Advanced Troubleshooting Guide
Contents
1. 3 Ifthe alarm persists there may be a problem with the pressure switch in the LifePulse in which case you will have to switch to another Life Pulse ventilator If the alarm persists call the Bunnell Hotline 800 800 4358 HFJV 7 Cannot Meet PIP Definition The Cannot Meet PIP alarm indicates that the monitored PIP has not been stable within 2 0 and 1 5 cm H20 of the Now PIP setting while the servo pressure has risen to its maximum output of 20 psi or The monitored PIP has not stabilized within 2 0 and 1 5 cm H20 of the Now PIP for 20 seconds within three minutes of pressing the Enter or Reset buttons Checks 1 Examine the patient for spontaneous breathing crying coughing hiccups seizures bronchospasm or the need for suctioning Calm medicate sedate or suction the patient 2 Has the servo pressure reached the maximum output of 20 psi before reaching the Now PIP The patient is too large to be ventilated by the Life Pulse at the current settings 3 Over humidification of Life Pulse circuit is causing water droplets to interfere with pressure monitoring Check the LifePort adapter orientation to make sure the pressure monitoring tube is pointed up Adjust humidifier temperature settings to minimize rainout see Appendix A Note Keep circuit temperature at 40 degrees C 4 Inspect the breathing circuit and humidifier cartridge for leaks or poor connections 5 Check the pinch valve for possible malfunction2. by more than 3 degrees C and remained there for more than 3 minutes Place the humidifier in Wait mode Open the cartridge door and check the spring loaded contact pins to make sure they spring in and out and that all the pins are at about the same level If any pins look stuck trying pulling them back out to the level of the other pins Close the cartridge door press the Wait button and see if the alarm has cleared If the alarm persists press the Standby button and replace the humidifier cartridge circuit Press the Enter button to resume normal operation If the alarm does not go away it is likely that the humidifier module has failed internally and the Life Pulse will need to be changed out Note If the circuit has been in use for less than seven days call Bunnell for a Return Authorization number and return the circuit for a credit If the alarm persists call the Bunnell Hotline 800 800 4358 HFJV 14 High and Low Water Level Alarms Definition The Level High alarm indicates that the water in the humidifier cartridge has reached Checks the highest water level sensor The Level Low alarm indicates the water in the humidifier cartridge has not reached the lowest water level sensor 1 High Water Level Alarms a b Make sure sterile H20 was used to fill the humidifier cartridge Make sure the water inlet tube is installed properly in the water pump housing Was the humidifier manually filled to the high level
3. possible problem with the Life Pulse electronics or valves Checks 1 Inspect the purge tubing for disconnections or kinks at the front panel and patient box purge connectors 2 Inspect the LifePort pressure monitoring tube for disconnections or kinks at the patient box pressure monitoring tube connector 3 Replace the patient box to determine if the purge valve or some other component in the patient box is the cause of the alarm Ventilator Fault Codes 01 A D converter failure 02 Test of purge valve airway transducer 03 Test of PWM valve servo transducer 04 Test of watchdog 05 RAM failure 06 ROM check sum error 07 NMI failure to execute 08 IRQ failure to execute 09 Both IRQ and NMI failure to execute 10 Significant and rapid rise in servo pressure During Self Test Code s 02 04 The 02 code is related to the purge system It can be caused by a lack of purge gas supply from the Life Pulse a failure of the purge valve in the patient box or the pressure transducer in the patient box The 02 code will appear if a test lung is not attached to the Life Pulse circuit or if the pressure monitoring line is not attached to the patient box The 03 code is related to the servo control valves or the servo pressure transducer The 03 code will appear if any of the valves do not open during the test or if the servo transducer does not recognize respond to the opening of the servo control va
4. resulting in fluctuating pressures Replace the patient box while the Life Pulse is in the Standby mode If the alarm persists call the Bunnell Hotline 800 800 4358 HFJV 8 Loss of PIP Definition The Loss of PIP alarm is activated by one or more of the following conditions The monitored PIP has dropped below 25 of the Now PIP or The monitored PIP is less than 3 cm H20 or Monitored value for delta P is lt 2 cm H30 Checks Warning If pinch valve is not cycling during Loss of PIP alarm put the Life Pulse in Standby mode before troubleshooting 1 Examine the patient for spontaneous breathing crying coughing hiccups seizures bronchospasm or the need for suctioning Calm medicate sedate or suction the patient 2 Over humidification of the Life Pulse circuit may be causing water droplets to interfere with pressure monitoring Check LifePort adapter orientation to make sure the pressure monitoring tube is pointed up Adjust the humidifier temperature settings i e lower the Cartridge Temperature in 1 degree increments to minimize rainout see Appendix A Note Keep circuit temperature at 40 degrees C 3 Inspect the breathing circuit and humidifier cartridge for leaks or poor connections 4 Inspect the pinch valve for possible malfunctions resulting in low PIP Replace the patient box while the Life Pulse is in the Standby mode Note Ifa Loss of PIP occurs in the Non Ready condition the servo control valves are t
5. FJV 12 Circuit Temp High Definition The Circuit Temp High alarm indicates the temperature in the patient breathing circuit as measured proximal to the patient box has exceeded the circuit temperature setting by more than 3 degrees C and remained there for more than 1 minutes or The measured temp is 44 degrees C which is the upper allowable limit Checks 1 Place the humidifier in Wait mode Open the cartridge door and check the spring loaded contact pins to make sure they spring in and out and that all the pins are at about the same level If any pins look stuck or damaged trying pulling them back out to the level of the other pins Close the cartridge door press the Wait button and see if the alarm has cleared 2 Ifthe alarm persists press the Standby button and replace the humidifier cartridge circuit Press the Enter button to resume normal operation If alarm does not go away it is likely that the humidifier module has failed internally and the Life Pulse will need to be changed out Note If the circuit has been in use for less than seven days call Bunnell for a Return Authorization number and return the circuit for a credit If the alarm persists call the Bunnell Hotline 800 800 4358 HFJV 13 Circuit Temp Low Definition The Circuit Temp Low alarm indicates the temperature in the patient breathing Checks circuit as measured proximal to the patient box has dropped below the circuit temperature setting
6. J bunnell INSPIRED INFANT CARE Life Pulse High Frequency Ventilator Alarms and Advanced Troubleshooting Guide 02684 01 1 Bunnell Incorporated Salt Lake City Utah 84115 Phone 801 467 0800 Fax 801 467 0867 Hotline 800 800 4358 Website www bunl com 02683 01 1 CONTENTS Servo Pressure Alarms 1 MAP Alarms 2 Jet Valve Fault Alarm 3 Ventilator Fault Alarms 4 Low Gas Pressure Alarm 5 Cannot Meet PIP Alarm 6 Loss of PIP Alarm 7 High PIP Alarm __8 Humidifier Temperature Alarms 9 Humidifier Water Level Alarms 10 Circuit Fault Alarms 11 Appendix 12 Introduction Successful troubleshooting combines a thorough knowledge of the ventilator with a systematic approach to problem solving In general troubleshooting should start with the patient and work back to the ventilator Is the patient s interaction with the vent or the patient s condition causing the alarm Is the ET tube in good position and clear of secretions Is there moisture excess humidity interfering with the pressure signal Is the LifePort adapter properly connected and is the pressure monitoring tube up between 10 to 2 o clock Did changing the LifePort adapter correct the problem Is the circuit installed properly Are there any kinks or poor connections Is the Patient Box running properly Has the sound or rhythm changed Is the ventilator running or has it been affected by electrical fluctuations Is it plugged i
7. e Life Pulse is in the Standby mode 5 Ifthe alarm persists it could be a stuck servo pressure valve Change out the Life Pulse ventilator 6 Never connect the Life Pulse to the patient s LifePort adapter while it is running the servo pressure may be higher than what is needed to achieve the set PIP for the patient a high PIP and large tidal volumes may be delivered Warning Connections to patient s LifePort should only be made while the Life Pulse is in Standby mode If the alarm persists call the Bunnell Hotline 800 800 4358 HFJV 10 Cartridge Temp High Definition The Circuit Temp High alarm indicates that the temperature measured in the humidifier cartridge of the breathing circuit has exceeded the cartridge temperature setting by more than 3 degrees C and has remained high for 10 minutes or The measured temp is 44 degrees C which is the upper allowable limit Checks 1 Place the humidifier in Wait mode Open the cartridge door and check the spring loaded contact pins to make sure they spring in and out and that all the pins are at about the same level If any pins look stuck or damaged trying pulling them back out to the level of the other pins Close the cartridge door press the Wait button and see if the alarm has cleared 2 Ifthe alarm persists press the Standby button and replace the humidifier cartridge circuit Press the Enter button to resume normal operation If the alarm does not go away it is li
8. e conventional ventilator for changes in setting or performance Inspect the pressure monitoring tube of the LifePort adapter for excess condensation or plugging If necessary reduce the humidifier cartridge temperature to reduce water condensation see Appendix A Note Keep circuit temperature at 40 degrees C Inspect the tracheal tube or airway for obstruction Inspect the WhisperJet patient box pinch valve for complete closure 2 Low MAP alarms Inspect the conventional ventilator for changes in settings or performance Inspect the pressure monitoring tube of the adapter for excess condensation or plugging If necessary reduce the cartridge temperatures to reduce condensation see Appendix A Note Keep circuit temperature at 40 degrees C Inspect the tracheal tube for positioning Inspect the breathing circuit and humidifier cartridge for leaks poor connections or kinks If the alarm persists call the Bunnell Hotline 800 800 4358 HFJV 3 Jet Valve Fault Definition The Jet Valve Fault alarm indicates that the pinch valve timing is out of synchrony with the Life Pulse s drive signal Checks 1 Replace the patient box to determine if it is the cause of the alarm 2 Ifthe alarm continues after changing the patient box change out the Life Pulse ventilator If the alarm persists call the Bunnell Hotline 800 800 4358 HFJV 4 Ventilator Fault Alarm Definition The Ventilator Fault alarm indicates a
9. ional tests fail call the Bunnell Hotline at 800 800 4358 for technical assistance If the alarm persists call the Bunnell Hotline 800 800 4358 HFJV 18
10. ioning properly is to run it on a test lung The test lung should consist of a 2 5 or 3 5 mm LifePort adapter connected to a 2 5 3 5 mm standard ET tube with a model lung on the patient end a finger from a surgical glove or a finger cot taped in place work fine If you have a test lung that incorporates a Hi Lo Jet ET triple lumen Jet tube discard the Hi Lo Jet tube and replace it with a standard tube and LifePort adapter The pressure monitoring tube of an old Hi Lo ET tube can become compressed over time and result in erroneous pressure information Note The conventional ventilator is not needed for testing the Life Pulse The 15 mm connection of the LifePort adapter is left open to the room during both test procedures The first procedure is to run an internal test by pressing the Test button This test checks all of the primary functions of the Life Pulse If a problem is detected the test sequence will stop and a code will be displayed in the ON OFF ratio display in the Control section If this internal test is passed run an operational test by pressing the Enter button If the set PIP is reached the Ready light is activated indicating the alarms have been activated and the PEEP is zero 0 1 cm H20 the operational test has been passed If both tests are passed the Life Pulse is functioning normally and can be placed into service This test sequence should only take 5 minutes to perform If either the internal test or the operat
11. kely that the humidifier module has failed internally and the Life Pulse will need to be changed out Note If the circuit has been in use for less than seven days call Bunnell for a Return Authorization number and return the circuit for a credit If the alarm persists call the Bunnell Hotline 800 800 4358 HFJV 11 Cartridge Temp Low Definition The Cartridge Temp Low alarm indicates that the temperature measured in the humidifier cartridge of the breathing circuit has dropped below the cartridge temperature setting by 3 degrees C and remained there more than 30 minutes Checks 1 Place the humidifier in Wait mode Open the cartridge door and check the spring loaded contact pins to make sure they spring in and out and that all the pins are at about the same level If any pins look stuck or damaged trying pulling them back out to the level of the other pins Close the cartridge door press the Wait button and see if the alarm has cleared 2 Ifthe alarm persists press the Standby button and replace the humidifier cartridge circuit Press the Enter button to resume normal operation If the alarm does not go away it is likely that the humidifier module has failed internally and the Life Pulse will need to be changed out Note Ifthe circuit has been in use for less than seven days call Bunnell for a Return Authorization number and return the circuit for a credit If the alarm persists call the Bunnell Hotline 800 800 4358 H
12. lve Sometimes running the Life Pulse on a test lung for 5 minutes will correct this alarm condition If the alarm persists call the Bunnell Hotline 800 800 4358 HFJV 5 The 04 code is related to the electronic watchdog circuit that monitors certain electronic functions in the Life Pulse If this code is activated during the test and stops the test from proceeding it is likely due to an electronic failure in the Life Pulse If any of these codes appear during the self test call the Bunnell Hotline Turn the main power button off and back on to clear the failed test so you can retry the self test when troubleshooting with the Bunnell clinical specialist During Run Code s 01 amp 05 10 If the Vent Fault alarm does not force the Life Pulse into Standby there will be no code displayed and the problem is likely due to a faulty purge valve or purge tube connections If purge tubing is connected at both the Purge fitting on the Life Pulse front panel and the From Purge fitting on the patient box the patient box will likely need to be replaced The 01 amp 05 09 are all related to microprocessor or electronic problems These codes place the Life Pulse in Standby mode where you have to turn off the power to reset the microprocessor Run the operational test on a test lung before restarting on a patient Ventilator Fault alarms are frequently caused by electrical fluctuations at hospital electrical outlets including those labeled a
13. nd see if the alarm has cleared If the alarm persists replace the humidifier cartridge circuit as described above If the alarm persists call the Bunnell Hotline 800 800 4358 HFJV 15 Circuit Fault Alarm Temp or Level Definition The Circuit Fault alarm Temp indicates an electrical fault is present in either the Checks humidifier cartridge or patient breathing circuit or Circuit Fault alarm Level indicates that the humidifier cartridge did not fill to the normal operating level in 86 seconds Ifthe alarm occurs within the first 2 minutes after the Enter button was pushed check the water reservoir to see if it is empty or disconnected Also inspect the water supply tubing coming from the water reservoir to see if it is clamped off or disconnected Inspect the cartridge housing door to make sure it is closed properly Place the humidifier in Wait mode Open the cartridge door and check the spring loaded contact pins to make sure they spring in and out and that all the pins are at about the same level If any pins look stuck or damaged trying pulling them back out to the level of the other pins Close the cartridge door press the Wait button and see if the alarm has cleared Press the Standby button and replace the humidifier cartridge circuit Press the Enter button to resume normal operation If the alarm does not go away it is likely that the humidifier module has failed internally and the Life Pulse
14. nto a UPS Is the humidifier running Are the contact pins o k Are the temperature controls set properly Is there water available for the humidifier To be effective at troubleshooting you have to understand how the Life Pulse works what the alarms are telling you and what can be done to correct the situation As always if you can t resolve the alarm quickly call the Hotline 800 800 4358 and have one of our clinical specialists help you If the alarm persists call the Bunnell Hotline 800 800 4358 HFJV 1 Upper and Lower Servo Pressure Alarms Definition The Servo Press alarm alerts the user to changes in the internal driving pressure or flow rate required to deliver breaths at the Now PIP rate and jet valve on time Servo Pressure Alarm Window Approx Patient Size lt 1 psi 0 2 psi lt 700 gm l 5 psi 20 0 2 1 0 psi 701 4000 gm gt 5 psi 1 0 psi gt 4001 gm Checks 1 High Servo Press alarms a Examine the patient for spontaneous breathing crying coughing hiccups seizures bronchospasm or the need for suctioning Calm medicate sedate or suction the patient Inspect LifePort adapter and connections for any leaks or cracks If the adapter integrity is in question replace the LifePort adapter with a new one Inspect the breathing circuit for leaks poor connections or occlusions Correct these conditions if present Inspect the Life Pulse circuit between the humidifier and patien
15. s protected by emergency backup generators Plugging the Life Pulse into a high quality Uninterruptible Power Supply will prevent such problems If power fluctuations are internal the Life Pulse will have to be switched out to remedy the problem Code 10 indicates a significant and rapid rise in Servo Pressure which can be caused by a dramatic change in ventilator settings such as changing Rate from 480 to 240 bpm If this alarm arose shortly after making such a dramatic setting change you should check for mechanical problems such as tubing disconnects then press the Enter button to restart the Life Pulse If no such ventilator setting changes were made just prior to this alarm support the patient with the conventional ventilator while you disconnect the Life Pulse from the patient connect it to a test lung and press TEST If the Life Pulse passes the TEST successfully verify its operation by running it on the test lung for a few minutes then reconnect the Life Pulse to the patient and resume operation from the Standby mode If the alarm persists call the Bunnell Hotline 800 800 4358 HFJV 6 Low Gas Pressure Alarm Definition The Low Gas Pressure alarm indicates that the pressure of the gas supply to the Life Pulse is below 30 psi Checks 1 See ifa gas supply is connected 2 Is the gas supply pressure less than 30 psi Check high pressure supply hoses for leaks Change the gas source blender or high pressure hoses as needed
16. sensor Was the water supply clamp opened prior to closing the water inlet tube in the water pump housing so that the humidifier cartridge over filled by gravity Place the humidifier in Wait mode Open the cartridge door and check the spring loaded contact pins to make sure they spring in and out and that all the pins are at about the same level If any pins look stuck or damaged trying pulling them back out to the level of the other pins Close the cartridge door press the Wait button and see if the alarm has cleared If the alarm persists press the Standby button and replace the humidifier cartridge circuit Press the Enter button to resume normal operation If the alarm does not go away it is likely that the humidifier module has failed internally and the Life Pulse will need to be changed out 2 Low Water Level Alarms Inspect the water supply tubing from the water reservoir to see if it is clamped off or disconnected Unclamp or reconnect the supply tubing Inspect the water reservoir to see if it is empty Replace the reservoir if necessary Make sure that sterile H20 was used to fill the humidifier cartridge Place the humidifier in Wait mode Open the cartridge door and check the spring loaded contact pins to make sure they spring in and out and all at about the same distance out If any pins look stuck or damaged trying pulling them back out to the level of the other pins Close the cartridge door press the Wait button a
17. t box for signs of over humidification droplets of water Adjust the circuit and cartridge temperature setting to minimize rainout see Appendix A Note Keep circuit temperature at 40 degrees C Evaluate the WhisperJet patient box for abnormal function odd sounds or visible problem with pinch valve operation Change the patient box if necessary Examine the patient for re expansion of the lung due to evacuation of an air leak such as pneumothorax bronchopleural fistula or for improved lung volume following recruitment 2 Low Servo Press alarms a Inspect the tracheal tube for improper position plugging or occlusion Correct these conditions if present Examine the patient for signs of airway obstruction Inspect the exhalation limb of the conventional breathing circuit for kinks Examine the patient for a tension pneumothorax or atelectasis Evaluate conditions a e listed under High Servo Press alarm If the alarm persists call the Bunnell Hotline 800 800 4358 HFJV 2 Upper amp Lower MAP Alarms Definition The MAP alarm alerts the user to changes in the mean airway pressure as monitored Checks by the Life Pulse High Limit MAP value at the time the Ready light comes on 1 5 cm H20 Low Limit MAP value at the time the Ready light comes on 1 5 cm H20 1 High MAP alarms Inspect the exhalation limb of the conventional breathing circuit and get rid of any kinks or water Inspect th
18. urned off and the dump valve will open to decrease servo pressure and protect the patient The alarm is activated if the PIP is lt 3 cm H20 ora delta P is lt 2 cm H20 12 seconds after the Enter button is pressed No other alarms are active in the Non Ready condition Pressing the Enter button will clear the alarm and allow the Life Pulse another attempt to reach the Now settings If the alarm persists call the Bunnell Hotline 800 800 4358 HFJV 9 High PIP Definition The High PIP alarm indicates that the monitored airway pressure has exceeded the Now PIP setting by 5 cm H20 continuously for 1 second or The monitored PIP for all breaths delivered in the last 30 seconds have exceeded the Now PIP by 10 cm H20 or The monitored PIP is 30 cm H20 above the Now PIP during any 0 75 sec period or The monitored PIP is gt 65 cm H 0 at any time Checks 1 Excessive pressure is being delivered by the conventional ventilator due to failure or an occluded exhalation limb of conventional ventilator circuit 2 Inspect the tracheal tube for improper position kinking or occlusion 3 Inspect the pressure monitoring tube of LifePort for excess condensation or kinking Check the LifePort adapter orientation to make sure the pressure monitoring tube is pointed up The LifePort adapter may need to be replaced to correct the situation 4 Inspect the pinch valve for possible malfunction resulting in high PIP Replace the patient box while th
19. will need to be changed out If the alarm persists call the Bunnell Hotline 800 800 4358 HFJV 16 Appendix A Proper Control of Humidification For Bunnell Life Pulse HFV Humidification on the Life Pulse may need to be adjusted for different environmental conditions Where is the patient s bed relative to air conditioning or heating vents doorways traffic patterns Is the patient in an open intensive care bed or a closed bed The humidifier is programmed so that the circuit air temperature is set at 40 degrees C and the cartridge water temperature is set at 38 degrees C In many situations these settings work fine but that doesn t mean they are always appropriate The circuit temperature should always remain at 40 degrees because the gas temperature cools as it accelerates through the patient box and the LifePort adapter We know from our testing that the delivered temperature at the ET tube is 37 degree C or less To control humidity minimize rain out you have to adjust the cartridge temperature The first step is to lower the temperature one degree clear the excess water from the Life Pulse circuit and wait 20 30 minutes to see if the situation improves If it does not drop the cartridge temperature 0 5 degrees and repeat the process Your goal is to have the clear portion of the circuit between the humidifier and the patient box dry small packs of mist or fog are ok but no droplets and the green portion between the patient bo
20. x and the patient covered in mist so that if you tapped the circuit droplets would immediately form Again we can help you with this process over the hotline 800 800 4358 Water droplets that get pushed through the LifePort adapter from the circuit or secretions that come up and out of the patient from the ET tube cause the same symptoms with respect to pressure monitoring They cause the PIP to drop and the PEEP to rise simultaneously Once the moisture moves through the LifePort the pressures move back the PIP rises and the PEEP drops This is always characteristic of moisture interference If the patient is causing the pressure to fluctuate it is usually isolated to the PIP dropping with the PEEP staying relatively constant in comparison Additional information on humidification control can be referenced on the Bunnell website www bunl com under the Clinical menu Clinical Directory Support Materials In service Manual Chapter 5 page 25 Identifying Proper Humidification If the patient on the Life Pulse is in one of the new closed style ICU beds e g Giraffe the easiest way to control over humidification is to put as much of the Life Pulse circuit inside the closed hood as possible The shorter the circuit is outside the bed the less rainout will occur If the alarm persists call the Bunnell Hotline 800 800 4358 HFJV 17 Appendix B Test Procedure for Bunnell HFJV The fastest way to determine if the Life Pulse is funct
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