GAITRite Electronic Walkway Technical Reference
Contents
1. 4 3 12 Length of Foot It is calculated by multiplying the midline of the footprint connecting point C1 to point C2 in Figure 6 by 1 5 The unit of measure is cm 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 34 of 50 4 3 13 Width of Foot It is measurement of Point Q to Point F in Figure 6 The unit of measure is cm 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 35 of 50 4 4 TEMPORAL DEFINITIONS DS1 Right Single Left Single en E Support I Support Left Step Time ight Step Time No Contact Left Swing Left Stance Floor Contact No Contact Right Swing Right Stance Right Floor Contact y Right Cycle A TIME Figure 9 4 4 1 First Contact It is the time that the first sensor appears in any quadrilateral It is expressed in seconds sec 4 4 2 Heel Contact It is the time that the first sensor appears in the heel quadrilateral of the foot It is expressed in seconds sec 4 4 3 Last Contact It is the time that the last sensor goes off in any quadrilateral It is expressed in seconds sec 4 4 4 Toe Off It is the time that the last sensor turns off in the forefoot quadrilateral of the foot It is expressed in seconds sec 4 4 5 Step Time It is the time elapsed from first contact of one foot to first contact of the opposite foot It is measured2. 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 50 of 50 Source Data Field Name set Description Heel Off Detail Heel Off Mid On Detail Mid On Mid Off Detail Mid Off Toe On Detail Toe On Toe Off Detail Toe Off Heel off on Detail Heel off on Double Support Loading Detail Double Support Loading Double Support Unloading Detail Double Support Unloading
3. Figure 11 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 41 of 50 4 6 Switching Level Parameters 1 P t for a section is the sectional integrated pressure over time expressed as a percent of the overall integrated pressure over time The overall P t can be found by summing the P t of each sensor sectional P t can be found by summing the P t of the sensors included in the particular section also expressed as a percent of the overall P t As illustrated in Figure 12 P t for sensor 1 is the total area under the curve calculated by 2 P t s1 020 010 1 030 020 2 070 060 6 140 130 1 3 Peak Time for a section is the first time point that one or more sensors within a section was at the maximum switching level Assume that a section included only the two sensors illustrated in Figure 12 the peak time is at 060 seconds Time count begins from first contact of the footprint 4 Area of asection is expressed in centimeters squared cm and represents the sum of the active sensor areas within a section Each sensor has an area of 5 in x 5 in or 1 27 cm x 1 27 cm 5 Peak P ressure for a section is the maximum sectional switching level expressed as a percent of the overall maximum switching level Sectional switching level occurs at the peak time of the section Assume that a section included only the two sensors illustrated in Figure 12 then peak time is at 060 secon
4. 61cm square and contains 2 304 sensors arranged in 48x48 grid pattern The sensors are placed on 5 inch 1 27cm centers Multiple sensor pads are connected to form the desired length of the walkway Measurements are provided using x y coordinates of sensors with distance converted to cm and time in seconds up to an accuracy of 6dp Distance may be either the distance travelled along the plane of the walkway or the calculated distance between locations on the walkway 000000 200000000000000 009000000000 000000000000 O 000000000000 20000000 200000000000 9000000000C poc anos aS 660600600 00000000000000000000 0000000000000000000000 000000 00000 OG 000000000000 000000000000 o000 00900000 00000000000 000000000000 00000P10000000000 og 000000000 00000000 0000 600000000000 00000 9000000000 00000000000000000 00000000 O 00000000000 6000000000000000000000 4 1 1 GAITRite displays and exports As the subject ambulates across the walkway the pressure exerted by the feet onto the walkway activates the sensors The walkway does not only sense the geometry of the activating objects but also the relative arrangement between them in a two dimensional space In addition the walkway senses the vertical component of the relative pressure exerted by the objects What makes the walkway valuable for gait analysis are the special algorithms built into the system The algorithms isolate the objects and ident
5. 1ST SENSOR ACTIVITY TOGGLE SYNCOUT SYNCOUT low to high trigger on first active sensor 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 23 of 50 3 7 SYNC Input Connection Errata 04 20 2011 This section applies to Interface Devices with Orange label and version numbers F or greater For all other versions please contact our Support Department The SYNC INPUT connection is utilized to capture the logic state of an external signal identified as an event by the GAITRite system Events are inserted in the data stream of the GAITRite walkway as they occur in real time Later these events will appear as time marks in the temporal parameters review Antenna Optional Internal SPEAKER METRONOME STATUS aer SYNC INPUT O Aw SYNC OUTPUT lt a Connector Connector INPUT ze O my a GAITRite POWER USB cable Firewire cable Connect to GAITRite System Connect to Host PC USB port POWER INPUT Connector 3 7 1 SYNC Input Light A Yellow light marked SYNC INPUT is employed as a visual indicator for the functions associated with this connection Lit ON signal at connector input is logic level low Not Lit OFF signal at connector input is logic level high Default 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 24 of 50 3 7 2 SYNC Input Software Controls The functionality of the SYNG INPUT port i
6. 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 1 of 50 GAITRite Electronic Walkway Technical Reference Document Number WI 02 15 Document Filename WI 02 15 Rev L 05 06 2013 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 2 of 50 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 3 of 50 CONTENTS LU PRODUCT INFORMATION usanne de 5 20 The GARE VS 6 2L Intended Us E E E E EE 6 222 Safety Instruccional RU 7 2 3 Connecting the Walkway oseiro eie bees epe UR e EEE ROES NE OKOE EEEN AES S OEE EE Si 8 24 Connection Problems e Eee iria EE ias 8 2 5 SSELVICE PLOCEOUIC O O eve ee 8 2 6 Cl ning InstFuCllofis ee eiecti eee yere rte pee NT e e RN Re ERE Uer VERRE IUe as 9 DE Storage and transporting decide deett rene eec eere rue le pre eee Eee A eerte Pep rv eed ede 9 2 8 Environmental Specifications for the GAITRite System eese 10 2 9 Classification of the GAITRite System eese esee enne eene enne nemen nnne nene nne 10 2 10 GAITRite Walkway Technical Specifications errrronnvnvorrvennnnerrrvennenerrrnennnnerrrnennnnerrrvennenesrssennesee 11 2 11 GATTRite Electrical Ratings tr tere tee eee ee b re 12 2 12 Blectromagnetic compatibility nete rette ette areas rende 12 2 13 Electromagnetic Emissions Guidance and manufacturer s declaration sues 12 2 14 Walk
7. GAITRite walkway data with the data of the external system 3 7 8 SYNC Input Electrical Characteristics The SYNC INPUT signal includes an internal pull up resistor 2 2KOhm and has the following electrical characteristics Input Low Voltage lt 1 V Input High Voltage gt 2 0V Max Input Voltage 5V Delay from trigger 1 frame of sampling rate 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 25 of 50 External signal must be able to sink 4 ma Minimum time low state 18 msec Minimum time high state 18 msec Max Input Frequency 30Hz ESD protected to 15KV The diagram below provides a detailed view of the connections required at the SYNC INPUT connector Users can make their own interface cable to use between two systems or our company can provide you one Please call our Technical Support Department METRONOME STATUS o SYNC INPUT connection 3 5mm Stereo Plug SYNC WI INPUT 10 SYNC signal OUTPUT OND SYNC y INPUT e Oo o GAITRite POWER COMPUTER 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 26 of 50 3 7 4 SYNC INPUT Reporting The following diagram represents the reporting activities of the Sync Input port The state of the SYNC INPUT A and A1 gets reported on the First Frame always Subsequent changes of the SYNC INPUT get reported within one frame of occurrence SYNC INPUT FIRST FRA
8. GAITRite Test Tray inclinometer Inclin Avg Tilt LR GAITRite Test Tray Inclinometer Average Tilt Left to Right Inclin Avg Tilt FB GAITRite Test Tray Inclinometer Average Tilt Front to Back Inclin Min Tilt LR GAITRite Test Tray Inclinometer Minimum Tilt Left to Right Inclin Max Tilt LR GAITRite Test Tray Inclinometer Maximum Tilt Left to Right Inclin Max Tilt FB GAITRite Test Tray Inclinometer Maximum Tilt Front to Back Inclin Min Tilt FB GAITRite Test Tray Inclinometer Minimum Tilt Front to Back Inclin Veloc Tilt LR GAITRite Test Tray Inclinometer Velocity Tilt Left to Right Inclin Veloc Tilt FB GAITRite Test Tray Inclinometer Velocity Tilt Front to Back 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 49 of 50 Source Data Field Name set Description Inclin SD Tilt LR GAITRite Test Tray Inclinometer Standard Deviation Tilt Left to Right Inclin SD Tilt FB GAITRite Test Tray Inclinometer Standard Deviation Tilt Front to Back Inclinometer2 GAITRite Test Cup inclinometer Inclin2 Avg Tilt LR GAITRite Test Cup Inclinometer Average Tilt Left to Right Inclin2 Avg Tilt FB GAITRite Test Cup Inclinometer Average Tilt Front to Back Inclin2 Min Tilt LR GAITRite Test Cup Inclinometer Minimum Tilt Left to Right Inclin2 Max Tilt LR GAITRite Test Cup Inclino
9. RF Inclinometer and Coffee Cup equipped with XBEE RF Inclinometer Each utility connection will be examined separately 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 15 of 50 3 2 Power Input Connection This input connection is designed to accept an external transformer The AC Adaptor provides power to the Interface Module and to the GAITRite walkway and was selected with very specific characteristics Do not use power adapters and or cables other than those supplied with your WARNING GAITRite equipment If AC Adaptor failure is suspected please call our Technical Support Department for a replacement To apply power first connect the AC plug of the external transformer to the AC wall outlet mains and then insert the other end 2 1 mm plug to the Interface Module Power Input connector When these connections are done correctly the green light marked POWER will be lit ON and power is available for the GAITRite Interface Module and the GAITRite electronic walkway Specifications and certifications for the specified AC Adaptor can be furnished upon request Antenna Optional Internal SPEAKER METRONOME STATUS s SSS SYNC INPUT O q SYNC SYNC OUTPUT Connector D OUTPUT Connector SYNC A INPUT G y o r GAITRite POWER Firewire cable COMPUTER USB cable Connect to GAITRite System Connect to Host PC USB port POWER INPUT Co
10. Reference WI 02 15 Rev L Page 21 of 50 3 6 3 SYNC Output Port Electrical Characteristics The SYNC OUTPUT signal has the following electrical characteristics Output Voltage Low 1V 5ma 5V 15ma Output Voltage High 5V 5ma 4V 15ma ESD protected to 15KV Connector 3 5mm Stereo Jack The diagram below provides a detailed view of the connections required at the SYNC OUTPUT connector Users can make their own interface cable to use between two systems or our company can provide you one Please call our Technical Support Department METRONOME STATUS O SYNC OUTPUT connection 3 5mm Stereo Plug SYNC Ww OUTPUT Oo og signal 4 D OUTPUT SYNC 4 A INPUT U gt Oo 2 o GAITRite POWER COMPUTER 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 22 of 50 3 6 4 SYNC Output Timing Diagrams START TEST K UNDETERMINED DELAY SYNCOUT SCAN TIMER START SCAN TIMER TOGGLE SYNCOUT END OF TEST END OF SCAN1 TOGGLE SYNCOUT SYNCOUT low to high default trigger on first scan START TEST K UNDETERMINED DELAY SYNCOUT SCAN TIMER START SCAN TIMER TOGGLE SYNCOUT END OF TEST END OF SCAN1 TOGGLE SYNCOUT SYNCOUThigh to low trigger on first scan START TEST k UNDETERMINED DELAY SYNCOUT J SCAN TIMER START SCAN TIMER END OF TEST END OF SCAN1 TOGGLE SYNCOUT
11. or repaired at the discretion of CIR Systems Inc Warranty will be voided by the limitations listed in this document 5 5 PROOF OF WARRANTY Please retain your invoice delivery note as proof of warranty 5 6 EXTENDED WARRANTY Extended warranty may be purchased separately by conducting our sales office 5 7 SALES AND SERVICE CIR Systems Inc 8 John Walsh Blvd Suite 429 Peekskill NY 10566 Phone 914 734 8178 FAX 914 734 8179 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 43 of 50 47DevM2 6 0 DOCUMENT UPDATES GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 44 of 50 Revision Revision Revision Level Date Description of Revision Author DRAFT 01 22 2003 Draft A 04 22 2003 Initial Release B 06 22 2008 Results of independent laboratory testing C 02 11 2010 ISO 14971 2007 risk analysis D 02 11 2011 Inserted SYNCH INPUT diagram E 04 20 2011 SYNC INPUT Errata and definitions for foot width length F 02 12 2011 Corrected Step Length Definition ECN 02122011 G 1 10 2012 GC Editorial update of technical manual and additional sections describing temporal values 4 3 21 23 H 2 24 12 GC 4 1 1 added displays and exports of right amp left and non foot specific fields noted I 4 27 12 GC 4 4 24 added definitions for SD amp CV J 6 11 2012 GC Updated definitions Ft Length amp Width SD s by R amp Lnot calculated K 6 13 12
12. 35 444 Toe Off seueco ome oe pep Rd T 35 445 Step Time co ius DOT Don Heine pondre 35 44 67 Stride Lime meet ek mee bore pue dete 35 441 Gat Cycle Tie etae REI i eek ea ee te ees 35 44 8 Ambulation Time sei 36 449 A o ese tene Reese eter 36 4 4 10 Mean Normalized Velocity sese nee arco nee neen eene 36 44 11 Stride Velocity needed mt Redeem peer 36 4 4 12 Single Support and Single Support sese 36 4 4 13 Initial Double Support and Initial Double Support oooonccnnncnocncononcccnancnancono canon nocnnocnnos 36 4 4 14 Terminal Double Support and 6 Terminal Double Support sess 36 4 4 15 Total Double Support and Total Double Support esee 36 4 4 16 Stance Time and Stance sse nenne E een neon arenas 36 4 4 177 Contact phase use eet ke it e aN 37 4 4 18 Midstance phase or Foot Flat sees nennen nennen rennen 37 44 19 Propulsive ph se tere e Beste ett Dee docta 37 4 4 20 Swing Time and 96S wing essen enne nennen tren trennen nera nennen 37 4421 Heekoff on ss soo aon Cae etr e rete Ir dicis 37 44 22 Walk Ratios aree tee hee AER ee etre id idas 37 4 4 23 Heel mid foot and toe temporal values sss 37 4 4 24 Means and Standard Deviations essen eene ener 37 45 SWITCHING LEVEES i netter oec dee ete te es Atl ei tette 39 4 6 Switc
13. AITRite System has been tested and found to comply with the limits for medical devices in IEC 60601 1 2 These are designed to provide reasonable protection against harmful interference in a typical medical installation In the event of interference power devices from separate mains supplies and or increase physical distance between devices Contact CIR Systems Inc Customer Service if you have any questions 2 13 Electromagnetic Emissions Guidance and manufacturer s declaration The Gaitrite Walkway System is intended for use in the electromagnetic WARNING environment specified below The customer or the user of the Gaitrite Walkway System should assure that it is used in such an environment Emissions Test Compliance Electromagnetic environment guidance RF Emissions CISPR 11 Group 2 The Gaitrite Walkway System must emit electromagnetic energy in order to perform its intended function Nearby electronic equipment may be effected RF Emissions CISPR 11 Class A Ble a Class B The Gaitrite Walkway System is suitable for Gul use in all establishments other than domestic Voltage fluctuations flicker Complies and those directly connected to the public low emissions voltage power supply network that supplies buildings used for domestic purposes Immunity test IEC60601 test Complian Electromagnetic environment level ce level guidance 47DevM2 GAITRite Electronic Walkway Technical Ref
14. AMMABLE ANESTHETIC MIXTURE WITH AIR OXYGEN NITROUS OXIDE WHERE SUCH GASES MAY ACCUMULATE IN CONCETRATION CLOSED SPACE 2 9 Classification of the GAITRite System Regulatory information Classification Specification Classification According to Directive 93 42 EEC as amended by Directive 2007 47 EC Class I Annex V Rule 1 Technical amp Quality Assurance IEC 60601 1 ISO 13485 2003 Classification of equipment per IEC 606011 24881 Degree of Protection Against Electric Shock per IEC 60601 1 1YPe B Degree of Protection Against Ingress of Water IPXO per IEC 60601 1 Mode of operation per IEC 60601 1 Continuous Electromagnetic Compatibility and Electromagnetic Emissions Compliance see attached tests EN 60601 1 2 2002 EN 61000 3 2 2000 EN 61000 3 3 1995 Country of Manufacture USA 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 11 of 50 2 10 GAITRite Walkway Technical Specifications Parameter Walkway Specification Walkway Overall Dimensions for 10 pad walkway 35 25 x 276 x 125 250 height of electronics box 90cm x 700 cm x 3 2 mm 6 mm height of electronics box Custom lengths are available Active Area for 10 pad walkway 24 4 015 x 240 15 60 96cm x 609 6cm Spatial Resolution 5 1 27cm Spatial Resolution Accuracy 5 1 27cm Sample R
15. GC Additional clarification of measurements definitions added based on client request Export fields appendix included L 5 6 2013 GC Updated addtess of manufacturer GC Correction to field name listing for Supp Base On Std Dev Right to Supp Base Std Dev Right matches updated language mdb 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 45 of 50 7 0 Appendix Export fields All measured and calculated fields are available for export from within the GAITRite software It is not recommended that clients manipulated the gaitrite database but rather they export the data to excel Source Data Field Name set Description Pt Record Patient GAITRite Patient Record number Patient Id Number Patient Patient Id Number Medical Record Patient Medical Record Number Last Name Patient Last Name First Name Patient First Name Middle Initial Patient Middle Initial Gender Patient Gender Birthdate Patient Birth date Age Patient Age Height Patient Height Weight Patient Weight Primary Doctor Id Patient Primary Doctor Id Primary Doctor Name Patient Primary Doctor Name Secondary Dr Code Patient Secondary Dr Code Secondary Dr Name Patient Secondary Dr Name Leg Length Left Patient Leg Length Left Leg Length Right Patient Leg Length Right Problem Id Code Patient Problem Id Code Proble
16. Gait Cycle time for the same foot Refer to Figure 9 the sum DS1 DS2 is the Total Double Support for the right foot while the sum DS2 DS3 is the Total Double Support for the left foot 4 4 16 Stance Time and Stance The stance phase is the weight bearing portion of each gait cycle It is initiated by heel contact and ends with toe off of the same foot It is the time elapsed between the First Contact and the Last Contact of two consecutive footfalls on the same foot It is also presented as a percentage of the Gait Cycle time 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 37 of 50 4 4 17 Contact phase It begins with heel strike and continues until about 22 of the stance phase Forefoot loading terminates contact phase Toe Off Last Contact Heel Off 4 4 18 Midstance phase or Foot Flat It begins with the first sign of forefoot loading The end of midstance is heel lift of the support limb This occurs at about 50 of the stance Forefoot First Contact Heel Strike First Contact 4 4 19 Propulsive phase This is the final 50 of the stance phase It begins heel lift until toe off i i CONTACT EE i i MID i 4 4 20 Swing Time and Swing PHASE STANCE EE FOOT It is initiated with toe off and ends with heel strike ERE It is the time elapsed
17. ME STATE REPORTING ONLY ON FIRST TEST AFTER POWER UP 11213 141516 7 18 9 10 11 12 13 14 15 16 C FRAME COUNTER SYNC INPUT STATE A X 11213 4 5 6 7 18 19 110111112113114 115 16 D1 C1 E1 FRAME COUNTER SYNC INPUT STATE A1 X 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 27 of 50 3 8 Metronome The Metronome function of the GAITRite Interface Module provides an audible tone at pre selected rates beats minute A yellow light labeled METRONOME is associated with this function and blinks at the rate beats minute The audible tone is generated by an internal speaker located above the metronome yellow light Please avoid covering this area of the Interface Module enclosure You can enable the metronome and select the beat rate through the GAITRite Software By default the metronome function is disabled Antenna Optional Internal SPEAKER METRONOME STATUS SYNC OUTPUT Connector SYNC INPUT Connector av Se GAITRite COMPUTER USB cable Connect to Host PC USB port Bia Firewire cable Connect to GAITRite System POWER INPUT Connector 47DevM2 4 0 GAITRite MEASUREMENTS amp DEFINITIONS GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 28 of 50 Encapsulated within the electronic walkway are sensor pads Each sensor pad has an active area of 24 inches square
18. T O Jor d I eas Firewire cable GAITRite POWER COMPUTER USB cable Connect to GAITRite System Connect to Host PC USB port POWER INPUT Connector 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 17 of 50 3 4 GAITRite Connection The GAITRite walkway is considered an ESD Electrostatic Discharge sensitive ESD device Electrostatic discharge as high as 4000V readily accumulate on the human CAUTION body and can discharge without detection Although the GAITRite walkway features protection circuitry permanent damage may occur when subjected to high energy electrostatic discharges Therefore proper ESD precautions are recommended to avoid performance degradation or loss of functionality A cable nine feet long has one end hard wired with the GAITRite Interface Module the other end has a Firewire connector ready to plug to a Platinum Gaitrite System An approved extension cable can be utilized to extend the range of this connection Note The total length should not exceed 48 feet Approved cables are available from our Technical Support Department With power applied to the GAITRite Interface Module connect this cable to the walkway The red light associated with this connection marked GAITRite indicates the status of the connection between the Interface Module and the walkway The light will not be lit OFF if the connection is successful The light w
19. adrilateral ssronoronoronrrvrorvrnvvrnvnnnvnnnnnnrnnvennvennvenneenarevasvrnevensnenvnnsvvesvesse 29 4 2 20 Identify Heel Mid and Toe areas sse eene 29 42 3 Identity the centroid zs etie tte eee tete er et 30 4 2 44 Identify the twelve quadrilaterals eese nennen 31 4 3 SPATIAL PARAMETERS amp DEFINITIONS eene nennen eene ener 32 43 1 HeelCenter onere Et tia 32 4 32 Eine of Progression ie eene trteecteci Pete ete tei Ie recibe eee itte E 32 433 Stride Length censes ad ne eed ibt Leche 32 4 3 4 Step Length eae tete hetero I dit Saas 32 4 3 5 H H Base of Support or Base Width sss 33 ABO Toe In TOS QUU eet acea ete Le eases TM n dais 33 43 73 Distance Traveled see eet ee ER GREGG tke es Redalen 33 4 3 8 Feg Eength EI id dite pers 33 4 3 9 Step Extremity Ratio ione eee tert ettet Pre dire e Eo ooi 33 4 3 10 Step Width cease A eat he Sat NE teak e me obe ei bui Pes 33 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 4 of 50 43 11 Stride width pepe Dur tas 33 4 3 12 Length of Eoot neget eerte moe oberen bene 33 43 13 Wadth OF Foot smt e poReD etel piens 34 44 TEMPORAL DEFINITIONS rrt rrt tete eer e Dur rrt ree ke nds 35 44 1 FurstContact ine eee ooo D onere DOR T tte p ees 35 442 Heel Contactos DOOR TRO pH 35 44 3 Woast Contacts cansas staat eee Deep ORC ds
20. ate 60 80 100 120 180 240Hz Temporal Accuracy 1 sample Quality Test Method Each Walkway is placed over existing walkway previously calibrated and compared against 3D Video System The Ambulation Time Velocity between the two systems are compared Expected Ambulation time within 1 sample rate Expected Ambulation Velocity within 2 Walkway to Walkway Spatial Accuracy 5 1 27cm Walkway to Walkway Temporal Accuracy 1 sample Walkway to Walkway Switching Level Accuracy 5 switching level Walkway Top Cover Flame retardant anti slip vinyl Walkway Bottom Cover Open cell neoprene rubber Internal Materials Uncoated polyesters 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 12 of 50 2 11 GAITRite Electrical Ratings Mains power quality should be that of a typical commercial or hospital environment If the user of the Gaitrite Walkway System requires continued operation during power mains interruptions it is recommended that the Gaitrite Walkway System be powered from an uninterruptible power supply or battery Certifications for the specified AC Adaptor can be furnished upon request Rating Specification WARNING UTILIZE ONLY THE AC ADAPTOR SUPPLIED WITH YOUR EQUIPMENT AC Adapter 100 240V 8 4A Input Voltage AC Adapter 9 VDC 3 0A Output Voltage 2 12 Electromagnetic compatibility The G
21. between the Last Contact of the current footfall to the First Contact of the next Fue 10 footfall on the same foot It is expressed in seconds sec and it is also presented as a percent of the Gait Cycle of the same foot The Swing Time is equal to the Single Support time of the opposite foot 4 4 21 Heel off on This is the heel on time for the next foot minus the heel off time for this foot 4 4 22 Walk Ratios Currently the GC is calculated by producing a ratio based on the mean values of the variable and the mean value of the gait cycles 4 4 23 Heel mid foot and toe temporal values The percentage time Heel only toe only and mid foot values are determined from heel on to toes off and the mid section temporal values These values are displayed in the temporal data and are different to the contact mid stance and propulsive phases described above Heel only is that time that only the heel is on the floor Heel only Mid On Heel On Mid section is the time when the foot mid section is on the floor excludes heel toe only Mid section Mid Off Mid On Toe only is the time that only the toe is on the floor Toe Only Toe Off Mid Off Percentage values can only be calculated correctly for walks where the heel contact is the earliest foot event and the toe off the last event 4 4 24 Means and Standard Deviations Means and standard deviation of Footfall measured events are calculated at the footfall level Mea
22. ds and a peak switching level of 6 then expressed as a percent of the overall maximum switching level A ay s a EA A O wk pp Am pf pp SSS mar pcr EA AP B c OEE E sepE S j p a e y EG ETE p apu qr o AAA AAA EAST a EE Table 2 Switching Levels by Section Sensor 1 Switching Levels ose NWHRLOAAN Sensor 2 Switching Levels ose NWROAOAN 010 020 030 040 050 060 070 080 090 100 110 120 130 140 150 Figure 12 Time in Seconds 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 42 of 50 5 0 WARRANTY INFORMATION 5 1 Software The software is licensed to the end user for use with the GAITRite System It may be installed on any number of computers within the purchasing organization for this application without any additional fee Copies of the software may not be resold No transfer of copyright is granted or implied by this agreement 5 2 License Key As shipped the software can run basic functions In order to access advanced functions a license key generated based on your purchase information is sent separately via carrier or email 5 3 Software Updates To obtain the latest software release please visit www gaitrite com 5 4 WARRANTY This product is warranted for 12 twelve months from date of shipment for manufacturing defects and or component failures Defective equipment will be replaced
23. e Support and elnitial Double Support The two periods when both feet are on the floor are called initial double support and terminal double support Initial double support occurs from heel contact of one footfall to toe off of the opposite footfall It is measured in seconds sec and also expressed as a percent of the Gait Cycle time for the same foot Refer to Figure 9 DS1 is the Initial Double Support for the right foot while the DS2 is the Initial Double Support for the left foot 4 4 14 Terminal Double Support and Terminal Double Support The two periods when both feet are on the floor are called initial double support and terminal double support Terminal double support occurs from opposite footfall heel strike to support footfall toe off It is measured in seconds sec and also expressed as a percent of the Gait Cycle time for the same foot Refer to Figure 9 DS2 is the Terminal Double Support for the right foot 4 4 15 Total Double Support and Total Double Support The two periods when both feet are on the floor are called initial double support and terminal double support Initial double support occurs from heel contact of one footfall to toe off of the opposite footfall Terminal double support occurs from opposite footfall heel strike to support footfall toe off Total double support is the sum of the initial double support added to the terminal double support It is measured in seconds sec and also expressed as a percent of the
24. e sec L GAITRite Test Double Support Time sec Left Double Supp Time sec R GAITRite Test Double Support Time sec Right Step Time Differential GAITRite Test Left Right foot Step time ratio Step Length Differential GAITRite Test Left Right foot Step Length ratio Cycle Time Differential GAITRite Test Left Right foot Cycle time ratio Functional Amb Profile GAITRite Test FAP score Treatment Count GAITRite Test Treatment Count Footfalls GAITRite Test Footfalls Comments GAITRite Test Comments Normalized Velocity GAITRite Test Velocity normalized using leg length 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 47 of 50 Source Data Field Name set Description Leg Length cm L GAITRite Test Leg Length cm Left Leg Length cm R GAITRite Test Leg Length cm Right Number of Passes GAITRite Test Number of Passes Ambulatory Devices GAITRite Test User defined Ambulatory Aids GAITRite Test User defined User GAITRite Test User Toe In Out L GAITRite Test Angle of toe Toe In Out R GAITRite Test Angle of toe Heel Off On Time L GAITRite Test Heel Off On Time Left Heel Off On Time R GAITRite Test Heel Off On Time Right Heel Off On Perc L GAITRite Test Heel Off On Percent Left Heel Off On Perc R GAITRite Test Heel Off On Percent Right Double Support L
25. ect of neutral position foot orthoses on gait of children with down syndrome Doctoral Thesis PA 1993 Hahnemann University 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 30 of 50 4 2 3 Identify the centroid So far the footprint was divided into three quadrilaterals with the intention of identifying the sensors for the heel mid foot and toe areas Figure 4 illustrates the heel area quadrilateral ALNC in this case a trapezoid and the sensors included in the heel area of the footprint Point C1 the centroid represents the center of the heel area The centroid is the pivot point of the two dimensional sensor structure shown in gray Figure 4 Figure 5 illustrates the toe area quadrilateral EPRG in this case a trapezoid and the sensors included in the toe area of the footprint Point C2 the centroid represents the center of the toe area The centroid is the pivot point of the two dimensional sensor structure shown in gray Figure 5 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 31 of 50 4 2 4 Identify the twelve quadrilaterals As illustrated in Figure 6 in this specific footprint the quadrilaterals form trapezoids but in other cases the quadrilaterals could form rectangles Point C1 the centroid of trapezoid ALNC represents the heel center of the footprint Point C2 the centroid of trapezoid EPRG represents the toe metata
26. ecting the Walkway To connect the GAITRite walkway follow these steps 1 Make sure the computer is turned on 2 Unroll the electronic walkway 3 Utilize ESD cautionary procedures and connect the USB plug of the Interface Cable to an available USB port on the PC 4 Utilize ESD cautionary procedures and connect the fire wire connector of the Interface Cable to the GAITRite walkway 5 Plug the AC Adaptor into a mains and connect the other end to the Power Input of the Interface Cable Do not use power adapters and or cables other than those supplied with your CAUTION garrRite equipment The GAITRite walkway is considered an ESD Electrostatic Discharge sensitive ESD device Electrostatic discharge as high as 4000V readily accumulate on the human CAUTION body and can discharge without detection Although the GAITRite walkway features protection circuitry permanent damage may occur when subjected to high energy electrostatic discharges Therefore proper ESD precautions are recommended to avoid performance degradation or loss of functionality 2 4 Connection Problems If the walkway is not working properly follow these steps to determine the area of the problem 1 Check the power light on the Interface Module if it is ON lit go to step 2 If the light is not on check the wall outlet if determined that it is working properly then contact our Customer service department 2 Check the Green power light located on the Master cove
27. equirements of the local authorities The materials included in the walkway are listed in the GAITRite Materials Specifications section of this document Local Authorities may require separation of the electronic devices and recycling during disposal 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 14 of 50 3 0 The GAITRite Platinum Interface This document describes the use and specifications for the GAITRite Interface Module The Interface Module is not an accessory it is an integral part of the GAITRite System It supplies power to the GAITRite walkway provides the communications cabling between the GAITRite walkway and the host personal computer and provides means to interface and synchronize with external systems 3 1 Interface Utilities The GAITRite Interface Module includes standard utilities which are hard wired always enabled and available to communicate with all GAITRite software modules and versions of the GAITRite Electronic Walkway The standard utilities are Power Input connection Cable to connect to host Computer Cable to connect to the GAITRite walkway and Status indicator The GAITRite Interface Module includes optional utilities Optional utilities must be purchased separately and are enabled from the GAITRite Software The optional utilities are SYNC OUTPUT interface SYNC INPUT interface METRONOME XBEE RF peripheral Interface Food carrying tray equipped with XBEE
28. erence WI 02 15 Rev L Page 13 of 50 interrupts and voltage variations on power supply input lines IEC 61000 4 1 1 6096 dip 5 cycles 7096 dip 25 cycles 95 dip 5 sec Electrostatic discharge 6kV Contact Complies ESD IEC 61000 4 2 8kV Air Floors should be wood concrete or ceramic tile If floors are covered with synthetic material the relative humidity should be at least 30 Radiated RF IEC 3 V m 80MHz Complies 61000 4 3 to 2 5GHz Field strengths outside the shielded location Conducted RF 3Vrms 150kHz Complies from fixed RF transmitters as determined IEC 61000 4 6 to 80MHz by an electromagnetic site survey should be less than 3 V m Interference may occur in the vicinity of equipment marked with the following symbol e Electrical fast transient 2kV power line 1kV Complies IEC 61000 4 4 I O lines Surge 1kV differential 2kV Complies Mains power quality should be that of a IEC 61000 4 5 common typical commercial or hospital environment Voltage dips short gt 95 dip 0 5 cycle Complies Mains power quality should be that of a typical commercial or hospital environment If the user of the Gaitrite Walkway System requires continued operation during power mains interruptions it is recommended that the Gaitrite Walkway System be powered from an uninterruptible power supply or battery 2 14 Walkway Disposal Disposal of the walkway should be done according to the r
29. hing Level Parameters osornnrvnrrnnrrvnvrnnvenvvennvennvernrvrnevrnennnvvnnvnnnvnnrnnesvnvvnvensvevaserasvrasvresvnssnen 41 50 WARRANTY INFORMATION a qct daua 42 5L SOLO EE EE Re e Rte ar es ee E A ei e Ate ese 42 23 2 License Keys eate D OU e ER e oec Et eei reins 42 Did Software Updates tiere libri toe en 42 54 WARRANTY etn iota eet aus eite Utile Re teniente 42 23 09 PROOF OF WARRANTY ctetuer ibid 42 3 6 EXTENDED WARRANTY iet Rn toti UR RR Uie n EO Er deeds 42 245 SAEBS AND SERVICE tie ettet tae iet bett E eei eet 42 60 DOCUMENT UPDATES vasene ope qoc e Uode epp ee ee dnne 44 7 0 Appendix Export fields 6 seen ie opel o ed hoe pda pd une 45 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 5 of 50 1 0 PRODUCT INFORMATION Product Name The GAITRite Electronic Walkway Manufacturer CIR Systems Inc Name Address 376 Lafayette Rd Sparta NJ 07871 Country of United States Manufacture Certifications ISO 13485 2012 AC 2012 ISO 13485 2003 CE SNCH 0499 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 6 of 50 2 0 The GAITRite Walkway 2 1 Intended Use The GAITRite System is an electronic walkway utilized to measure the temporal timing and spatial two dimension geometric position parameters of its pressure activated sensors The GAITRite system s intent is to be utilized as a measuring device for the events
30. ht Step Extremity ratio L GAITRite Test Step Extremity ratio Left Step Extremity ratio R GAITRite Test Step Extremity ratio Right Cycle Time sec L GAITRite Test Cycle Time seconds Left Cycle Time sec R GAITRite Test Cycle Time seconds Right Stride Length cm L GAITRite Test Stride Length cm Left Stride Length cm R GAITRite Test Stride Length cm Right HH Base Support cm L GAITRite Test Heel Heel Base Support cm Left HH Base Support cm R GAITRite Test Heel Heel Base Support cm Right Swing of Cycle L GAITRite Test Swing percent of Cycle Left Swing of Cycle R GAITRite Test Swing percent of Cycle Right Swing Time sec L GAITRite Test Swing Time seconds Left Swing Time sec R GAITRite Test Swing Time seconds Right Stance of Cycle L GAITRite Test Stance percent of Cycle Left Stance of Cycle R GAITRite Test Stance percent of Cycle Right Stance Time sec L GAITRite Test Stance Time seconds Left Stance Time sec R GAITRite Test Stance Time seconds Right Single Supp Cycle L GAITRite Test Single Support percent Cycle Left Single Supp Cycle R GAITRite Test Single Support percent Cycle Right Single Supp Time sec L GAITRite Test Single Support Time sec Left Single Supp Time sec R GAITRite Test Single Support Time sec Right Double Supp Cycle L GAITRite Test Double Support percent Cycle Left Double Supp Cycle R GAITRite Test Double Support percent Cycle Right Double Supp Tim
31. ify them as footprints As a convention all fields that are computed independently of right left foot result in a single number that will normally appear in the column labeled left in the grid numbers computed independently for each foot will appear labeled as left or right 4 2 FOOTPRINT ANALYSIS The software utilizes special algorithms to automatically group sensors and form footprints Once a footprint has been formed it will be divided and the following areas will be identified A quadrilateral that encloses the footprint 2 The heel mid and toe areas of the footprint 3 The centroid geometric center of each area and Each area will be examined separately Each quadrilateral is divided into four equal quadrilaterals 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 29 of 50 4 2 1 Identify the quadrilateral The method for defining the quadrilateral of a footprint was first developed by Shores and later improved upon by Lisa Selby Silverstein while an automated improved version of the algorithm has been implemented by the GAITRite system The following steps refer to Figure 3 1 4 2 2 Identify the two most outer sensors on the medial side of the footprint sensor 1 and sensor 3 Draw the medial line the line that connects sensor 1 to sensor 3 Identify the two most outer sensors on the lateral side of the footprint sensor 5 m and sensor 6 Draw the lateral
32. ill be lit ON if the connector is not plugged into the walkway or the Interface Module can not communicate with the walkway Antenna Optional Internal SPEAKER METRONOME STATUS AAA Q KA EEE SYNG INPUT O Y SYNC SYNC OUTPUT Connector ad OUTPUT Connector I 4 G Gr r a av ms Firewire cable GAITRite POWER COMPUTER USB cable Connect to GAITRite System Connect to Host PC USB port POWER INPUT Connector 47DevM2 3 5 Status Indicator GAITRite Electronic Walkway Technical Reference WI 02 15 Page 18 of 50 A yellow light marked STATUS is utilized to display errors It blinks when a problem is encountered The blinking rate and the number of blinks are utilized by our Technical Support Department to identify the problem You are encouraged to call our Technical Support Department if you observe a blinking status light after you start a test SYNC INPUT Connector em Firewire cable Connect to GAITRite System Antenna Optional Internal SPEAKER INPUT OUTPUT GAITRite POWER COMPUTER POWER INPUT Connector SYNG OUTPUT Connector E USB cable Connect to Host PC USB port 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 19 of 50 3 6 SYNC Output Connection The SYNC OUTPUT connection is utilized to synchronize external systems with the GAITRite walk
33. in seconds sec 4 4 6 Stride Time It is the time elapsed between the first contacts of two consecutive footfalls of the same foot It is measured in seconds sec 4 4 7 Gait Cycle Time It is the elapsed time between the first contacts of two consecutive footfalls of the same foot It is measured in seconds sec 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 36 of 50 4 4 8 Ambulation Time It is the time elapsed between first contact of the first and the last footfalls It is measured in seconds sec 4 4 9 Velocity It is obtained after dividing the Distance Traveled by the Ambulation time It is expressed in centimeters per second cm sec 4 4 10 Mean Normalized Velocity It is obtained after dividing the Velocity by the Average Leg Length and it is expressed in leg length per second LL sec The average Leg Length is computed left leg length right leg length 2 4 4 11 Stride Velocity It is obtained after dividing the Stride Length by the Stride Time It is expressed in centimeters per second cm sec 4 4 12 Single Support and 96 Single Support It is the time elapsed between the Last Contact of the current footfall to the First Contact of the next footfall of the same foot Refer to Figure 9 Single Support time is equal to the Swing Time of the opposite foot It is measured in seconds sec and expressed as a percent of the Gait Cycle time of the same foot 4 4 13 Initial Doubl
34. irst footprint to the heel center of the last footprint The unit of measure is centimeters 4 3 8 Leg Length LL It is measured in centimeters from the greater trochanter to the floor bisecting the lateral Malleolus Each leg should be measured separately The unit of measure is centimeters 4 3 9 Step Extremity Ratio It is defined as the Step Length divided by the Leg Length of the same leg The result is an absolute number 4 3 10 Step Width It is measured from the Q midline midpoint of the NN current footprint to the ZN LEK midline midpoint of the i previous footprint on the iic Th MM up y opposite foot In Figure 8 amp BL XD cdi puse Et Ge E OL distance XY is the right Aa i HS step width while distance AK X Right Stride Width YZ is the left step width The unit of measure is NG s Y P centimeters 4 3 11 Stride width Right Step Width E It is the vertical distance gt i E Left Step Width from midline midpoint of one footprint to the line 3 formed by midline to midpoints of two footprints of the opposite foot In Figure 8 the height of the triangle XYZ is YP which is the stride width of the right foot The unit of measure is centimeters Figure S
35. line the line that connects sensor 5 to sensor 6 4 Identify the rear most outer sensor s p sensor 2 From sensor 2 draw a line Nx P perpendicular to the medial line The N two lines intercept at point A Extend XE eg the line to intercept the lateral side at m d oint L 5 Az i Ds N ee X eS Identify the front most outer sensor s 2 EH sensor 4 From sensor 4 draw a line N AA perpendicular to the medial line The wor two lines intercept at point G Extend the N d line to intercept the lateral side at point R Figure 3 The formed quadrilateral ALRG in this case a trapezoid encloses the footprint efficiently Identify Heel Mid and Toe areas Refer to Figure 3 and identify points C and E these two points divide the medial line AG into three equal spaces From point C draw a line perpendicular to the medial line and extended it in order to intercept the lateral line at point N Similarly from point E draw a line perpendicular to the medial line and extended it in order to intercept the lateral line at point P Quadrilateral ALNC contains the Heel area sensors CNPE contains the mid foot area sensors and EPRG contains the toe area sensors 1 Shores M Footprint analysis in gait documentation an instructional sheet format Phys Ther 60 1163 1980 2 Silverstein LS the eff
36. m Description Patient Problem Description Registered on Date Patient Registered on Date Last Tested On Date Patient Last Tested On Date Last FAP score Patient Last FAP score Prime Contact Name Patient Prime Contact Name Phone number Patient Phone number Fax Number Patient Fax Number Address line 1 Patient Address line 1 Address Line 2 Patient Address Line 2 City Patient City State Patient State Zip Patient Zip Country Patient Country Location Patient Location Discharge Date Patient Discharge Date Discharge Flag Patient Discharge Flag Footfall Id Pattern Code Patient Footfall Id Pattern Code Test Record GAITRite Test GAITRite Test Record number Pt Record GAITRite Test GAITRite Patient Record number 47DevM2 GAITRite Electronic Walkway Technica Reference WI 02 15 Rev L Page 46 of 50 Source Data Field Name set Description Date Time of Test GAITRite Test Date Time of Test Distance GAITRite Test Distance Ambulation Time GAITRite Test Ambulation Time Velocity GAITRite Test Velocity Step Count GAITRite Test Step Count Cadence GAITRite Test Cadence Step Time sec L GAITRite Test Step Time seconds Left Step Length cm L GAITRite Test Step Length cm Left Step Time sec R GAITRite Test Step Time sec Right Step Length cm R GAITRite Test Step Length cm Rig
37. meter Maximum Tilt Left to Right Record Detail GAITRite Record Number Test Record Detail GAITRite Test Record Number Pt Record Detail GAITRite Patient Record Number FootFall Object 4 Detail Foot Fall Object Number Date Time Stamp Detail Date Time Stamp Heel X Detail Sensor Location Heel Y Detail Sensor Location Toe X Detail Sensor Location Toe Y Detail Sensor Location relative to pressure Lowest X Detail Sensor Location relative to pressure Highest X Detail Sensor Location relative to pressure Lowest Y Detail Sensor Location relative to pressure Highest Y Detail Sensor Location relative to pressure First Contact Time Detail First Contact Time Last Contact Time Detail Last Contact Time Foot Flat Time Detail Foot Flat Time Begin Time Detail Begin Time End Time Detail End Time Left Right Foot Detail Left Right Foot Step Length Detail Step Length Stride Length Detail Stride Length Base of Support Detail Base of Support Step Time Detail Step Time Stride Time Detail Stride Time Swing Time Detail Swing Time Stance Time Detail Stance Time Single Support Time sec Detail Single Support Time sec Double Support Time sec Detail Double Support Time sec Stride Velocity Detail Stride Velocity Real Foot Flag Detail Real Foot Flag Pass Number Detail Pass Number Toe In Out Detail Toe In Out Step Width Detail Step Width Stride Width Detail Stride Width Heel On Detail Heel On
38. nge SYNCOUT form High to Low At end of test change SYNCOUT back to high When this option is selected the SYNCOUT starts at level high SYNCOUT light ON During the first scan the SYNCOUT signal changes state to level low the light turns OFF not lit It continues on this state until an end of test the SYNCOUT signal will go back to level high and the light will turn ON Start with SYNCOUT low Upon detecting first sensor activity change SYNCOUT form Low to High At end of test change SYNCOUT back to low When this option is selected SYNCOUT starts at level low SYNCOUT light OFF The SYNCOUT will remain low until the first sensor change is detected during this scan the SYNCOUT signal will change state to level high the light will turn ON and will continue on this state until an end of test the output signal will go back to level low and the light will turn OFF Start with SYNCOUT high Upon detecting first sensor activity change SYNCOUT form High to Low At end of test change SYNCOUT back to high When this option is selected SYNCOUT starts at level high SYNCOUT light ON The SYNCOUT will remain high until the first sensor change is detected during this scan the SYNCOUT signal will change state to level low the light will turn OFF and will continue on this state until an end of test the output signal will go back to level high and the light will turn ON 47DevM2 GAITRite Electronic Walkway Technical
39. ngth Left Foot Width Left GAITRite Test Foot Width Left Foot Length Right GAITRite Test Foot Length Right Foot Width Right GAITRite Test Foot Width Right Step Len Std Dev Left GAITRite Test Step Length Standard Deviation Left Step Len Std Dev Right GAITRite Test Step Length Standard Deviation Right 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 48 of 50 Source Data Field Name set Description Step Time Std Dev Left GAITRite Test Step Time Standard Deviation Left Step Time Std Dev Right GAITRite Test Step Time Standard Deviation Right Stride Length Std Dev Left GAITRite Test Stride Length Standard Deviation Left Stride Length Std Dev Right GAITRite Test Stride Length Standard Deviation Right Stride Time Std Dev Left GAITRite Test Stride Time Standard Deviation Left Stride Time Std Dev Right GAITRite Test Stride Time Standard Deviation Right Swing Time Std Dev Left GAITRite Test Swing Time Standard Deviation Left Swing Time Std Dev Right GAITRite Test Swing Time Standard Deviation Right Stance Time Std Dev Left GAITRite Test Stance Time Standard Deviation Left Stance Time Std Dev Right GAITRite Test Stance Time Standard Deviation Right Stride Velocity Std Dev Left GAITRite Test Stride Velocity Standard Deviation Left Stride Velocit
40. nnector 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 16 of 50 3 3 Computer Connection The GAITRite walkway is considered an ESD Electrostatic Discharge sensitive ESD device Electrostatic discharge as high as 4000V readily accumulate on the human CAUTION body and can discharge without detection Although the GAITRite walkway features protection circuitry permanent damage may occur when subjected to high energy electrostatic discharges Therefore proper ESD precautions are recommended to avoid performance degradation or loss of functionality A cable six feet long has one end hard wired with the GAITRite Interface Module the other end has a USB connector ready to plug to a standard USB 2 0 port of a host computer Note An extension cable can be utilized to extend the range of this connection The total length of this connection should not exceed 12 feet With power applied to the GAITRite Interface Module connect this cable to the USB port of your GAITRite computer The red light associated with this connection marked COMPUTER will be not lit OFF if the computer has successfully communicated with GAITRite Interface Module The red light will be lit ON if the computer can not successfully communicate with the GAITRite Interface Module Antenna Optional Internal SPEAKER METRONOME STATUS e SYNC INPUT Oo qe SYNC SYNC OUTPUT Connector q n OUTPUT Connector SYNC 4 A INPU
41. ns and Standard deviations SD Coefficient of Variance CV of Gait Cycle events are calculated using the summary data The SD is determined as the sample SD the root of the sums of variance s from the mean divided by n 1 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 38 of 50 CV x100 Y SD calculations of foot width or foot length by Left amp Right feet are not implemented 47DevM2 4 5 SWITCHING LEVELS GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 39 of 50 The GAITRite walkway s unique and patented sensor avoids false peripheral activation Each sensor has been constructed with two flexible elements riding on a pivot point When pressure is applied to the sensor both elements must flex around the pivot point to initiate activation otherwise the pivot point will toggle the sensor in either side without activation After activation the sensor begins to change its value linearly with the vertical component of pressure exerted upon it Yellow Table 1 Switching Levels Color Assignment behavior of the section The walkway contains thousands of sensors therefore calibration of each and every sensor is not impossible but cost prohibitive Pressure values are normalized and expressed as a percent of the maximum pressure and then divided into levels Currently there are seven switching levels illustrated in Table 1 The walkway does not only sen
42. o not fold crease or puncture the walkway as this will void the warranty e Never move the walkway without first rolling it up on the supplied drum e f you decide to allow the walkway to permanently lay on the floor then make sure you WARNING provide adequate protection from rolling heavy equipment over the walkway e f you decide to allow the walkway to permanently lay on the floor then make sure you provide adequate signs to warn the floor cleaning personnel to keep a distance while mopping the floors e f you decide to allow the walkway to permanently lay on the floor then make sure that the area will not flood during storms If uncertain please remove the AC Adapter from the mains when the walkway is not in use 47DevM2 2 8 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 10 of 50 Environmental Specifications for the GAITRite System Condition Specification Storage amp Transportation Temperature Humidity 29 to 50 degrees C 20 to 122 degrees F Relative humidity up to 80 up to 31 degrees C decreasing linearly to 50 at 40 degrees C Operating Temperature Humidity 10 to 40 degrees C 40 to 104 degrees F Relative humidity up to 80 up to 31 degrees C decreasing linearly to 50 at 40 degrees C General Use WARNING INDOOR USE ONLY Not suitable for wet locations Flammable Gases WARNING NOT SUITABLE FOR USE IN THE PRESENCE OF FL
43. oad Time L GAITRite Test Double Support Load Time Left Double Support Load Time R GAITRite Test Double Support Load Time Right Double Support Load GC L GAITRite Test Double Support Load Percent Gait Cycle Left Double Support Load GC R GAITRite Test Double Support Load Percent Gait Cycle Right Double Support Unload Time L GAITRite Test Double Support Unload Time Left Double Support Unload Time R GAITRite Test Double Support Unload Time Right Double Support Unload GC L GAITRite Test Double Support Unload Percent Gait Cycle Left Double Support Unload GC R GAITRite Test Double Support Unload Percent Gait Cycle Right Asst Ortho etc 1 GAITRite Test User defined Asst Ortho etc 2 GAITRite Test User defined Asst Ortho etc 3 GAITRite Test User defined Asst Ortho etc 4 GAITRite Test User defined Asst Ortho etc 5 GAITRite Test User defined Type of Test GAITRite Test User defined Software Version GAITRite Test Software Version Number of Pads GAITRite Test Number of Pads Normal Group Code GAITRite Test Normal Group Code Standard Walk Steps GAITRite Test Standard Walk Steps Standard Amb Time GAITRite Test Standard Ambulation Time Stride Velocity Left GAITRite Test Stride Velocity Left Stride Velocity Right GAITRite Test Stride Velocity Right Shoe Flag GAITRite Test Shoe Flag Expected Foot Length GAITRite Test Expected Foot Length Expected Foot Width GAITRite Test Expected Foot Width Foot Length Left GAITRite Test Foot Le
44. occurring during biped and quadruped locomotion Inferred parameters are easily obtained by applying common physics and math formulas to the directly measured temporal and spatial data i e calculate velocity relationships between spatial and temporal events etc GAITRite Walkway A AC Adaptor N aster Labe GAITRite connection Computer USB Port H connection AG Master Power Indicator Green GAITRite f Platinum Electronic Interface amp Metronome 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 7 of 50 2 2 Safety Instructions WARNING Make sure you have read and understood all the information listed in this document and the User s Manual If you require additional information and or training please contact our Customer Service The company assumes that the user is trained in relevant professional fields or is familiar with the measurements provided by the GAITRite system The company assumes that you have read and understood the intended use of the GAITRite system and the safety instructions Before allowing subjects to ambulate across the GAITRite walkway the subjects must be given adequate support based on an assessment of their gait and balance abilities Barefoot testing is not recommended If the protocol requires you to test barefoot
45. r of the GAITRite Electronic Walkway if it is not ON lit then be sure the cables are securely attached If you determined that all cables are secured then the problem is a failure of the Interface Cable contact our Customer service department 2 5 Service Procedure The GAITRite does not contain any serviceable parts Please contact our Technical Support department 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 9 of 50 2 6 Cleaning Instructions The walkway requires periodic cleaning in order to prevent a build up of dirt and contaminants The correct cleaning procedures are e Before cleaning ensure that the GAITRite equipment is disconnected from the mains power outlets and any peripheral devices e The walkway may be cleaned with a damp cloth using any proprietary solution of mild detergent or disinfectant Do not use solvents or abrasives Afterwards moisten a clean cloth with clear cold water and wipe the walkway surface WARNING e Allow the walkway to dry completely before use e Do not place the walkway near any flame or ignition sources and do not drop lighted cigarettes matches on or near the walkway 2 7 Storage and transporting For storage or transporting the walkway must be properly rolled round the cardboard cylinder and placed in the storage container provided e Always lay the container on its side As indicated by the labels do not stand it on end e D
46. rsal center point This footprint is geometrically represented by twelve trapezoids six medial and six lateral area Quadrilaterals are formed in the two dimensional representation of the footprint in order to isolate the sensors and later perform calculations based on the isolated sensors of each quadrilateral The line that connects point C1 to point C2 is the midline of the footprint Figure 6 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 32 of 50 4 3 SPATIAL PARAMETERS amp DEFINITIONS The walkway does not only sense the geometry of the activating footprints but also the relative arrangement between them in a two dimensional space Figure 7 illustrates three footprints Figure 7 4 3 1 Heel Center Points A D and G are the heel centers of each footprint 4 3 2 Line of Progression It is defined as the line connecting the heel centers of two consecutive footfalls of the same foot Illustrated in Figure 7 the line of progression is formed by connecting point A to point G 4 3 3 Stride Length It is measured on the line of progression between the heel points of two consecutive footprints of the same foot left to left right to right In Figure 7 AG is the stride length of the left foot The unit of measure is centimeters 4 3 4 Step Length I
47. s configured and enabled from your GAITRite Software The SYNC input port can be configured for the following ADDITIONAL HARDWARE FUNCTION REQUIRED RESULTS Mark Event GAITRite Event When the switch gets pressed the yellow light will Switch with wires or go ON and a mark will be placed on the current wireless frame of the GAITRite data When the switch gets released default state the yellow light will go OFF and another mark will be placed on the current frame of the GAITRite data Mark Event with audible GAITRite Event When the switch gets pressed the yellow light will tone Switch with wires or go ON a mark will be placed on the current frame wireless of the GAITRite data and an audible tone will be generated by the GAITRite Interface Module When the switch gets released normal state the yellow light will go OFF and another mark will be placed on the current frame of the GAITRite data without generating an audible tone External System Trigger External system To synchronize the GAITRite System with an compatible with the external system the signal of the external system electrical must meet the electrical characteristics described characteristics of the below Sync Input Port detailed below On every logical transition signal edge of the signal at the SYNC INPUT the GAITRite walkway will insert a mark in the GAITRite data stream Upon review of the temporal parameters you can use the inserted marks to align the
48. se the geometry of the activating footprints but also the relative arrangement between them in a two dimensional plane and the relative vertical component of pressure exerted by each footprint The pressure is represented by a switching level As discussed earlier the division of the footprint provides us with twelve sections six sections are located in the medial side of the footprint and six in the lateral Each section contains a number of activated sensors enclosed within a trapezoid The GAITRite algorithms utilize the sectional division to identify the activated sensors included within each quadrilateral and then perform calculations to objectively describe the 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 40 of 50 As illustrated in Figure 11 medial trapezoid AHIB includes the following sensors 1 2 3 4 6 and 7 Lateral trapezoid HLMI includes the sensors 5 10 11 15 and 16 A sensor can be claimed by only one trapezoid and not shared by others Sensor 4 has most of its surface area within trapezoid AHIB and will be claimed only by this trapezoid If the surface area of a sensor is equally divided among two or more quadrilaterals i e sensor 12 then the sensor will be claimed by the first trapezoid in the algorithm The results of the switching parameters are presented in the format illustrated in Table 2
49. t is measured along the length of the walkway from the heel center of the current footprint to the heel center of the previous footprint on the opposite foot In Figure 7 the length of line AX is the step length of the right foot while the length of line YG is the step length of the second left foot The step length can be a negative value if the subject fails to bring the landing foot heel point forward of the stationary foot heel point The unit of measure is centimeters 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 33 of 50 4 3 5 H H Base of Support or Base Width It is the vertical distance from heel center of one footprint to the line of progression formed by two footprints of the opposite foot In Figure 7 the height of the triangle ADG is DL which is the base width of the right foot The unit of measure is centimeters 4 3 6 Toe In Toe Out It is the angle between the line of progression and the midline of the footprint In Figure 7 theta is the angle between the mid line of the right footprint and the line of progression Angle theta is zero if the geometric mid line of the footprint is parallel to the line of progression positive toe out when the mid line of the footprint is outside the line of progression and negative toe in when inside the line of progression The unit of measure is degrees 4 3 7 Distance Traveled It is measured on the horizontal axis from the heel center of the f
50. then you will have to setup your own quality procedure that follows the disinfection rules per our cleaning instructions and accounts for allergy irritation produced on the bare feet from the walkway s top surface The GAITRite equipment should be installed and set up in the test area prior to the arrival of any Subjects Cables must be routed in a safe manner to avoid any risk of tripping Subjects and users Adhesive tape can be utilized to affix cables on the floor For safety prepare the subjects by pointing out the tripping hazards posed by the perimeter height of the walkway and the routed cables For safety Subjects should stand on the dead area of the walkway before beginning a test thus avoiding to trip at the entry point of the walkway The test area must be large enough for a fully unrolled walkway and also provide ample space at the beginning and end of the walkway for the Subjects to safely start and finish their walk When lifting packing or relocating the GAITRite walkway make sure that you observe proper lifting for heavy items 60 120 Lbs The floor of the test area must be clean and completely dry prior to unrolling the walkway Before testing Subjects make sure their shoes do not have points or sharp edges that can damage the surface of the walkway Do not use damaged or frayed GAITRite equipment 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 8 of 50 2 3 Conn
51. way Disposals pete e eiecit ese pere eret e pese ree te eue divecgentu E e ia a a 13 3 0 The GAITRite Platinum nterfaee sete e oo Ea e Ernte i t Det eee t Pet ect utes 14 34 Intertace Utiles inei tere bee reete deno t etre stride 14 3 2 Power Input Connection a sni ete ra Hd epe oet n eere Heredes dence 15 3 3 Computer Connection ope RA 16 3 4 GALTRite Connection O OT RISUS EE ERU eaa REESE RATEALE ARER i 17 3 5 Status Indicator e et RU dAkke AASE ER iia 18 3 6 SYNE Output Connection nie eer ea EEES EEEo e t HOT DR attt eren 19 3 6 1 SYNC Output Lights mr opener DD RT Rd 19 3 6 2 SYNC Output Software Controls esses nennen eene eene enne 20 3 65 SYNC Output Port Electrical Characteristics eese 21 3 6 4 SYNC Output Timing Diagrams sees nennen nennen rene eene enne 22 3 7 SYNE Input Connection esce sese epo pr He rt tede etre 23 3 4 SYNC Toput A Dette re pt I Rh 23 3 52 SYNC Input Software Controls tt eei cem there tetti 24 3 7 5 SYNC Input Electrical Characteristics eese 24 3 74 SYNC INPUT Reporting eese REDI sri 26 3 8 Metronome uns eR Ee Re areas Graden rea 27 4 0 GAITRite MEASUREMENTS amp DEFINITIONS een 28 4 1 1 GAITRite displays and exports ccooccnoccconnconcnononononnnonnnnononononnncn nono tne tenete 28 42 FOOTPRINT ANALYSIS vetet mre eter erede eripe esee e er Rete 28 4 2 1 Identify the qu
52. way such as Electromyography equipment etc Antenna Optional Internal SPEAKER METRONOME STATUS NE SYNC INPUT O SYNC SYNC OUTPUT Connector a OUTPUT Connector SYNC INPUT Oo Mas m Firewire cable GAITRite POWER COMPUTER USB cable Connect to GAITRite System Connect to Host PC USB port POWER INPUT Connector 3 6 1 SYNC Output Light A Yellow light marked SYNC OUTPUT is employed as a visual indicator for the functions associated with this connection Lit ON signal at connector output is logic level high Not Lit OFF signal at connector output is logic level low Default 47DevM2 GAITRite Electronic Walkway Technical Reference WI 02 15 Rev L Page 20 of 50 3 6 2 SYNC Output Software Controls Logic transitions for the SYNC OUTPUT signal can be selected from a list included in the GAITRite Software The options are shown below Signal at SYNC OUTPUT connector Description Default Start with SYNCOUT low During the first scan change SYNCOUT form Low to High At end of test change SYNCOUT back to low When this option is selected SYNCOUT starts at level low SYNCOUT light OFF During the first scan the SYNCOUT signal changes state to level high the light turns ON It continues on this state until an end of test the SYNCOUT signal will go back to level low and the light will turn OFF Start with SYNCOUT high During the first scan cha
53. y Std Dev Right GAITRite Test Stride Velocity Standard Deviation Right Single Supp Time Std Dev Left GAITRite Test Single Support Time Standard Deviation Left Single Supp Time Std Dev Right GAITRite Test Single Support Time Standard Deviation Right Double Supp Time Std Dev Left GAITRite Test Double Support Time Standard Deviation Left Double Supp Time Std Dev Right GAITRite Test Double Support Time Standard Deviation Right Heel Off On Std Dev Left GAITRite Test Heel Off On Standard Deviation Left Heel Off On Std Dev Right GAITRite Test Heel Off On Standard Deviation Right Supp Base Std Dev Left GAITRite Test Support Base Standard Deviation Left Supp Base Std Dev Right GAITRite Test Support Base Standard Deviation Right Foot Length Std Dev Left GAITRite Test Foot Length Standard Deviation Left Foot Length Std Dev Right GAITRite Test Foot Length Standard Deviation Right Foot Width Std Dev Left GAITRite Test Foot Width Standard Deviation Left Foot Width Std Dev Right GAITRite Test Foot Width Standard Deviation Right Computer Time MSec GAITRite Test Computer Time MSec Trigger 10 GAITRite Test Metronome first beep time Trigger 1 1 GAITRite Test Not used Trigger 2 0 GAITRite Test Switch first time pressed Trigger 2 1 GAITRite Test Not used Trigger 1 E GAITRite Test Metronome last beep time Trigger 1E 1 GAITRite Test Not used Trigger 2 E GAITRite Test Switch last time pressed Trigger 2 E 1 GAITRite Test Not used Inclinometer1
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