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Datex-Ohmeda Aespire 7900, User'S Reference Manual

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6 Specifications and Theory of Operation

1009-0633-000 

6-21

At the specified time interval, the ventilator will wait for the next inspiratory 
effort from the patient. The sensitivity of this effort is adjusted using the flow 
trigger level. When the ventilator senses the beginning of inspiration it 
synchronously delivers a volume breath using the set tidal volume, and 
inspiratory time that is set on the ventilator. If the patient fails to make an 
inspiratory effort during the trigger window time interval, the ventilator will 
deliver a machine breath to the patient. The ventilator will always deliver the 
specific number of breaths per minute that the clinician has set.

In SIMV, the spontaneous breaths can be pressure supported to assist the 
patient in overcoming the resistance of the patient circuit and the artificial 
airway. When the Psupport level is set, the ventilator will deliver the pressure 
support level to the patient during inspiration. PEEP can also be used in 
combination with this mode.

 SIMV mode settings

PSVPro mode

Figure 6-8 • PSVPro diagram

PSVPro is pressure supported ventilation with apnea backup.

PSVPro is a spontaneous mode of ventilation that provides a constant 
pressure once the ventilator senses that the patient has made an inspiratory 
effort. The ventilator identifies an inspiratory effort using a flow trigger that is 
user adjustable. In this mode, the user sets the Pressure Support (Psupport) 
and PEEP levels. The patient establishes the frequency, inspiratory flow and 
inspiratory time. The tidal volume is determined by the pressure, lung 
characteristics and patient effort.

PSVPro uses an inspiration termination level that establishes when the 
ventilator will stop the pressure supported breath and cycle to the expiratory 
phase. The inspiration termination level is user adjustable from 5% - 50%. 
This parameter sets the percent of the peak inspiratory flow that the ventilator 
uses to end the inspiratory phase of the breath and to cycle into the expiratory 
phase. If the inspiration termination is set to 30% then the ventilator will stop 
inspiration when the flow decelerates to a level equal to 30% of the measured 
peak inspiratory flow. The lower the setting the longer the inspiratory time and 
conversely, the higher the setting the shorter the inspiratory phase.

•

VT

•

Rate

•

Tinspired •

Psupport •

PEEP

PEEP

T

I

Time

P

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Summary of Contents for Aespire 7900

Page 1: ...Aespire 7900 User s Reference Manual Part 2 Setup Cleaning and Sterilization Maintenance and Troubleshooting ...

Page 2: ...ithout the prior written approval of Datex Ohmeda The user of this Product shall have the sole responsibility for any malfunction which results from improper use faulty maintenance improper repair damage or alteration by anyone other than Datex Ohmeda w CAUTION U S Federal law restricts this device to sale by or on the order of a licensed medical practitioner Outside the U S A check local laws for...

Page 3: ...otes 1 11 How to attach equipment to the top shelf 1 12 2 Cleaning and Sterilization Breathing system cleanable parts 2 3 Special requirements 2 4 How to clean and disinfect the flow sensors 2 4 CIDEX sterilization 2 4 Procedure 2 5 Remove the breathing system bag hose 2 6 Remove the breathing system 2 7 Disassemble the breathing system 2 8 Disassemble the Bellows assembly 2 12 Assemble the Bellow...

Page 4: ...tion 3 5 100 O2 sensor calibration 3 9 Flow sensor zeroing 3 11 How to prevent water build up 3 12 4 Alarms and Troubleshooting About alarms 4 2 Alphabetical list 4 4 Breathing system problems no alarm 4 15 Electrical problems power failure etc 4 16 Pneumatic problems 4 18 Alarm settings range and default values 4 19 5 Parts Flow sensor module 5 2 Breathing circuit module 5 3 Bellows 5 4 Absorber ...

Page 5: ...12 Figure 6 2 legend 6 14 Physical specifications 6 15 System 6 15 Casters 6 15 Drawers 6 15 Ventilator display 6 15 Environmental requirements 6 15 Temperature 6 15 Humidity 6 15 Altitude 6 15 Breathing system specifications 6 16 General 6 16 Gas scavenging 6 17 Ventilator theory 6 18 6 18 Modes 6 19 Minimum monitoring 6 22 Ventilation operating specifications 6 23 Ventilator accuracy data 6 26 D...

Page 6: ...S 5 Aespire iv 1009 0633 000 Continuous suction regulator 6 28 Auxiliary O2 flowmeter optional 6 28 Warranty ...

Page 7: ...e equipment or in Datex Ohmeda manuals No one device or manual uses all of the symbols These symbols include øøøø On power Í Í Í Í Not autoclavable O Off power m m m m Type B equipment o Standby µ µ µ µ Type BF equipment q Standby or preparatory state for part of the equipment H H H H Type CF equipment p ON only for part of the equipment w w w w Caution ISO 7000 0434 œ OFF only for part of the equ...

Page 8: ... N Movement in one direction Isolation transformer ˆ Movement in two directions Low pressure leak test z Lock r Mechanical ventilation Z Unlock UClose drain 1 1 1 13 3 3 34 4 4 4 C C C C Autoclavable Q Expiratory flow uOpen drain remove liquid Alarm silence touch key q Inspiratory flow Menu touch key t O2 sensor connection Alarm silence touch key Tec 6 Volume alarms On Off touch key End case touch...

Page 9: ...h the European Council Directive 93 42 EEC for Medical Devices when they are used as specified in their Operation and Maintenance Manuals The xxxx is the certification number of the Notified Body used by Datex Ohmeda s Quality Systems European Union Representative XXXX ...

Page 10: ...Aespire 7900 viii 1009 0633 000 ...

Page 11: ...etup and Connections In this section Canister setup 1 3 Pneumatic and electrical connections 1 7 How to install gas cylinders high pressure leak test 1 8 Installation notes 1 11 How to attach equipment to the top shelf 1 12 ...

Page 12: ... toxic and will not Cause an allergic reaction in the patient React with the anesthetic gases or agent to produce dangerous by products w To prevent incorrect values or equipment malfunction use only Datex Ohmeda cables hoses and tubing w Desiccated absorbers can be hazardous in the presence of anesthetic agents Adequate precautions should be taken to ensure that soda lime in absorbers does not be...

Page 13: ... absorber In the event of skin or eye contact immediately rinse the affected area with water and seek medical assistance w Do not change the absorber during ventilation w Inspect absorbent color at the end of a case During non use absorbent can go back to the original color Refer to the absorbent labeling for more information about color changes w Desiccated dehydrated absorbent material may produ...

Page 14: ...bsorber The absorber canister is available in two versions Disposable Multi Absorber and Reusable Multi Absorber Both are removed and installed on the breathing system in the same way Each canister holds 800 g of loose absorbent Datex Ohmeda recommends Medisorb absorbent Both absorber versions should only be used with air oxygen nitrous oxide halothane enflurane isoflurane desflurane and sevoflura...

Page 15: ...i Absorber and Disposable Multi Absorber Both are removed and installed on the breathing system in the same way 1 Disposable Multi Absorber canister 2 System canister release latch 3 System canister support pin 4 Canister handle 5 Absorbent 6 Reusable Multi Absorber canister 7 Water reservoir Figure 1 1 Canister 3 1 2 4 5 6 7 ...

Page 16: ... Absorber canister filling 1 Turn the canister upside down and using your thumbs turn the cover locking ring counterclockwise to unlock it 2 Push up with your thumbs to release the seal 3 Lift off the cover to remove it 4 Remove and discard the foam filters 1 the absorbent and any water in the reservoir 5 To clean and disinfect the canister see Absorber canister in section 2 Cleaning and Steriliza...

Page 17: ...cover is properly sealed to prevent leaks and spillage Alignment of the arrows helps to indicate correct assembly 7 When replacing the canister make sure it is resting on both support pins before latching it into place Pneumatic and electrical connections wWARNING Equipment connected to the electrical outlets can increase the leakage current Regularly test the leakage current An optional isolation...

Page 18: ... ventilator has an RS 232C electrical interface The RS 232C connector allows serial input output of commands and data RS 232C signal standards 15 pin Female D connector Data Communications Equipment configuration DCE Pin 1 Monitor On Stby Pin 5 Signal ground Pin 6 Receive data Pin 9 Monitor On Stby Rtn Pin 13 Transmit data How to install gas cylinders high pressure leak test Pin indexed cylinder y...

Page 19: ...inder outlet away from all items that can be damaged by a release of high pressure gas 8 Quickly open and close the cylinder valve This removes dirt from the cylinder outlet wWARNING No gasket or more than one gasket can cause a leak 9 Install a new gasket 10 Align the cylinder post with the index pins 11 Close the yoke gate and tighten the tee handle 12 Install a cylinder plug and gasket in all e...

Page 20: ...ylinder valves open if the pipeline supply is in use Cylinder supplies could be depleted leaving an insufficient reserve supply in case of pipeline failure DIN cylinder connections 1 Close the cylinder valve on the cylinder to be replaced 2 Loosen the adapter and remove the cylinder 3 Remove the cap from the cylinder valve on the new cylinder 4 Point the cylinder outlet away from all items that ca...

Page 21: ... the leak continues do not use the system wWARNING Do not leave gas cylinder valves open if the pipeline supply is in use Cylinder supplies could be depleted leaving an insufficient reserve supply in case of pipeline failure Installation notes When the system is installed the Datex Ohmeda representative will check the following settings and change them if necessary wWARNING Thesesettingscanonlybec...

Page 22: ... wWARNING The top shelf has a weight limit of 34 kg 75 lb Place the equipment between the straps Fold the straps over each other and fully tighten and fasten them with the hook and loop surfaces wWARNING If you do not fully tighten the strap equipment can fall off the shelf ...

Page 23: ... 4 Remove the breathing system bag hose 2 6 Remove the breathing system 2 7 Disassemble the breathing system 2 8 Disassemble the Bellows assembly 2 12 Assemble the Bellows assembly 2 14 Bellows assembly tests 2 15 Assemble the breathing system 2 18 Install the breathing system 2 22 Remove the AGSS receiver 2 23 Remove the AGSS receiver filter 2 24 Absorber canister 2 25 ...

Page 24: ...damage Refer to the manufacturer s data if you have questions about a cleaning agent Do not use organic halogenated or petroleum based solvents anesthetic agents glass cleaners acetone or other harsh cleaning agents Do not use abrasive cleaning agents such as steel wool silver polish or cleaner Keep all liquids away from electronic parts Do not permit liquid to go into the equipment housings Do no...

Page 25: ...r Module plastic flow sensors not autoclavable 8 Exhalation Valve assembly Figure 2 1 Autoclavable assemblies Parts marked 134 C are autoclavable or washable by hand or machine mild detergent pH 10 5 Rinse and dry completely All parts except the O2 sensor and disposable flow sensors can be washed If the flow sensors are plastic refer to the How to clean and disinfect the flow sensors procedure If ...

Page 26: ... airways and cause irritation or injury wCAUTION Do not put the circuit O2 sensor or flow sensor connector in liquid w Do not autoclave the circuit O2 sensor or the plastic flow sensors w Do not clean the interior surfaces of the flow sensors Use a damp cloth on external surfaces only Inspect all parts for deterioration Replace them if necessary The Preoperative Tests section in Part 1 of the User...

Page 27: ... module from the breathing system 2 Pull the flow sensor module from the breathing system 3 Remove the flow sensors from the module Completely loosen the thumbscrew 1 Pull off the flow sensor cover 3 from the flow sensor holder 2 Remove the flow sensor connectors 4 from the flow sensor holder Pull the flow sensors 5 from the flow sensor holder 1 2 3 4 5 ...

Page 28: ...liquid from the sensor sensor tubes and connector wCAUTION Dry for 1 min with these precautions Maximum flow 10 L min Maximum pressure 100 cmH2O 10 Reverse steps 2 and 3 to reassemble the flow sensor module Be sure to align the flow sensor tubes with the grooves in the flow sensor holder 11 Before you use the system complete the Preoperative Tests in section 4 of the User Reference Manual Part 1 R...

Page 29: ...unlock the canister 2 Remove the canister by tilting it downward and off the two support pins 3 Push the release button 3 and gently pull the latch handle 4 to release the breathing system 4 Lightly grasp the rear handle 5 to support the breathing system Slide the breathing system away from the workstation pulling with the latch handle 1 2 3 4 5 ...

Page 30: ...t 1 Remove the breathing system and place on a flat surface 2 Pull the latch to unlock the flow sensor module from the breathing system 3 Pull the flow sensor module from the breathing system 4 Unscrew the sensor counterclockwise and remove it To remove the sensor cable from the breathing system press on the connector button 1 while pulling the connector out 1 ...

Page 31: ...w 1 Pull off the cover 2 from the Flow Sensor Holder 3 Remove the flow sensor connectors 4 from the Flow Sensor Holder Pull the flow sensors 5 from the Flow Sensor Holder 6 Rotate the breathing circuit module at the point shown by the dotted line 7 After rotating separate the two sections by pulling them apart 1 2 3 4 5 ...

Page 32: ...bly remove the check valves circuit lens 1 by squeezing the latches 2 together and pulling up on the lens 9 Press at 2 to unlock the ramp 1 Rotate the ramp and remove the tabs from the slots 3 to remove the ramp 10 Lift the diaphragm to remove it 2 1 2 1 3 ...

Page 33: ...2 Cleaning and Sterilization 1009 0633 000 2 11 11 Turn over the bellows base assembly grasp the bellows boot with three fingers in the openings at the points shown and pull straight away to remove it ...

Page 34: ...ved for cleaning if desired Loosen the two thumbscrews indicated and lift the assembly off Disassemble the Bellows assembly The bellows assembly can be disassembled for cleaning sterilization and part replacement 1 Turn the housing counter clockwise and lift 2 Remove the bottom edge of the bellows from the rim ...

Page 35: ...d the center and remove the rim 4 Remove the pressure relief valve wWARNING Do not disassemble the pressure relief valve This can damage the seat or diaphragm and cause injury to the patient 5 Push the latch toward the center and remove the locking tabs 6 Remove the seal ...

Page 36: ...Install the seal Verify the arrow on the seal points up 2 Push the latch toward the center and attach the locking tabs 3 Install the pressure relief valve 4 Push the latch toward the center and install the rim Verify you hear a double click when you install the rim ...

Page 37: ...g Make sure the lubricant is applied smoothly and there are no lumps 8 Perform the Bellows assembly tests before completing the assembly of the breathing system Bellows assembly tests wWARNING Objects in the breathing system can stop gas flow to the patient This can cause injury or death Do not use a test plug that is small enough to fall into the breathing system Make sure that there are no test ...

Page 38: ...thing system If there is a problem disassemble the bellows assembly Look for and replace damaged parts 1 Hold the bellows assembly vertical and close the ports 1 and 2 2 Invert the bellows assembly The bellows must not fall within one minute If it does The ports are not tightly sealed The bellows is incorrectly installed The seal inside the bellows is not correctly installed with its groove pointe...

Page 39: ... Permit the bellows to fully extend 4 Close port 3 5 Hold the bellows assembly upright The bellows must not fall past the guide line within one minute If it does The port is not tightly sealed The bellows or the pressure relief valve is not correctly installed Parts are damaged 3 3 ...

Page 40: ...g system Assemble the breathing system 1 Replace the exhalation valve assembly as shown Tighten the two thumbscrews 2 Turn over the bellows base assembly Replace the boot Be sure to insert it correctly into the ports as shown by the arrows Then press on the center of the boot arrow to snap it into place on the bellows base assembly ...

Page 41: ...9 0633 000 2 19 3 Replace the diaphragm 4 Insert the ramp tabs 1 into the slots 2 Rotate the ramp until it locks at 3 5 On the manifold assembly press the check valves circuit lens 1 down onto the latches 2 to lock the lens 3 2 1 2 1 ...

Page 42: ...sembly 8 Make sure the o ring 3 is on the O2 sensor Replace the sensor 1 by screwing it in clockwise Replace the O2 sensor cable connector 2 9 Attach the flow sensors to the module Insert the flow sensors 1 into the flow sensor holder Note the groove locations Attach the flow sensor connectors 2 to the flow sensor holder Attach the cover 4 to the flow sensor holder 3 Tighten the thumbscrew 5 to fa...

Page 43: ...2 Cleaning and Sterilization 1009 0633 000 2 21 10 Attach the flow sensor module to the breathing system 11 Push the latch 1 to lock the flow sensor module onto the breathing system 1 2 3 4 5 1 ...

Page 44: ...900 2 22 1009 0633 000 12 This is assembled breathing system Install the breathing system 1 Locate guide pin openings 1 and 2 2 Align opening 1 onto the guide pin 1 then align opening 2 onto guide pin 2 2 1 1 2 ...

Page 45: ...sh the breathing system in fully until it latches firmly 5 Install the absorber canister and bag hose 6 Before you use the system complete the Preoperative Tests in section 4 of the User Reference Manual Part 1 Remove the AGSS receiver The AGSS receiver may be removed for cleaning and sterilization 1 On the back of the system loosen the two thumbscrews 1 to release the system side panel 2 1 2 2 1 ...

Page 46: ...ve it 5 Replace the filter as necessary See following steps 6 Do these steps in the opposite order to replace the receiver and the side panel 7 Before you use the system complete the Preoperative Tests in section 4 of the User Reference Manual Part 1 Remove the AGSS receiver filter The AGSS receiver may be autoclaved To autoclave AGSS receivers which have a filter the filter must be removed becaus...

Page 47: ...ou use the system complete the Preoperative Tests in section 4 of the User Reference Manual Part 1 Absorber canister The absorber canister is available in two versions Disposable Multi Absorber and Reusable Multi Absorber Both are removed and installed on the breathing system in the same way Refer to Removing a canister in section 1 Setup and Connections Only the Reusable Multi Absorber canister m...

Page 48: ...es The water temperature should be approximately 40 C 104 F 3 Flush the canister and lid with fresh running water 4 When dry place a new filter in the bottom of the canister pour soda lime into the canister and place a new filter over the soda lime before closing and locking the cover Wipe off any soda lime dust 5 Align the cover slots with the canister locking tabs and press the cover down into p...

Page 49: ...materials Static electricity can cause fires wWARNING Obey infection control and safety procedures Used equipment may contain blood and body fluids wWARNING Movable part and removable components may present a pinch or a crush hazard Use care when moving or replacing system parts and components In this section Repair policy 3 2 Maintenance summary and schedule 3 2 Breathing system maintenance 3 4 O...

Page 50: ...air of devices of this nature Replace damaged parts with components manufactured or sold by Datex Ohmeda Then test the unit to ascertain that it complies with the manufacturer s published specifications Contact your local Datex Ohmeda Field Service Representative for service assistance In all cases other than where Datex Ohmeda s warranty is applicable repairs will be made at Datex Ohmeda s curren...

Page 51: ... 1 year Replace the disposable flow sensors plastic Under typical use the sensor meets specifications for a miminum of 3 months Replace the autoclavable flow sensors metal Under typical use the sensor meets specifications for a minimum of 1 year Replace the receiver filter active gas scavenging only Minimum Frequency Maintenance Minimum Frequency Planned Maintenance 12 months Have a qualified serv...

Page 52: ...assembly and tests O2 sensor replacement wWARNING Handle and dispose of sensors according to your biohazard policies Do not incinerate 1 Pull the latch 1 to unlock the flow sensor module from the breathing system 2 Pull the flow sensor module from the breathing system 3 Remove the O2 sensor cable connector 2 from the O2 sensor 1 and unscrew the sensor counterclockwise Don t lose the sensor o ring ...

Page 53: ...it is connected to a patient w The O2 sensor must be calibrated at the same environment pressure at which it will be used to monitor oxygen delivery in the patient circuit w Operation at pressures other than the pressures present during calibration may result in readings outside of the stated monitoring accuracy 21 O2 sensor calibration This procedure takes three minutes or less You must do the 21...

Page 54: ...tep 1 Push the Menu key to see the main menu Step 2 Turn the knob to select the Calibration screen Step 3 Push the knob to show the next screen Step 4 Turn and push the knob to select O2 Sensor Cal Step 5 Select 21 then push the knob ...

Page 55: ...teps shown on the screen To remove the O2 sensor from the circuit Pull the latch 1 to unlock the flow sensor module from the breathing system Pull the flow sensor module 2 from the breathing system Remove the O2 sensor 3 and leave it exposed to room air 2 1 3 ...

Page 56: ... Fa a a aii i ill l lu u u ur r r re e e e If the calibration fails Do the calibration again If it still fails do a 100 O2 sensor calibration step 11 If 100 O2 sensor calibration passes calibrate at 21 again After repeated failures replace the O2 sensor and re calibrate at 21 Step 8 To exit select Go to Cal Menu and push the knob You can also press the menu key to exit to the normal screen Select ...

Page 57: ...ration wWARNING Do not perform calibration while unit is connected to a patient Step 11 Turn then push the knob to select O2 Sensor Cal Step 12 Select 100 then push the knob Step 13 With the O2 sensor in the circuit fill the circuit with 100 O2 Push the flush button Then flow 100 O2 at 5L min Circuitshould be open Step 14 Select Start Cal Then push the knob to start calibration ...

Page 58: ...sensor and re calibrate at 21 Continue with steps 14 through 16 to exit to a normal screen Step 15 To exit select Go to Cal Menu and push the knob You can also press the menu key to exit to the normal screen Step 16 Select Go to Main Menu and push the knob Step 17 Select Exit to Normal Screen and push the knob Step 18 Do a breathing circuit leak test before using the system Go to Cal Menu Go to Ma...

Page 59: ...he flow sensor module from the breathing system Step 2 Pull the flow sensor module from the breathing system Step 3 When zeroing is complete the screen shows No Insp flow sensor and No Exp flow sensor Step 4 Install the flow sensor module Step 5 Do a breathing circuit leak test before using the system Refer to Breathing system tests in section 4 Preoperative Tests of the User Reference Manual Part...

Page 60: ...nd the absorbent in the absorber At lower fresh gas flows more water builds up because less gas is scavenged and More CO2 stays in the absorber to react and produce water More moist exhaled gas stays in the absorber Solutions Empty the water reservoir in the canister when changing the soda lime Ensure that water condensing in the breathing circuit tubes is kept lower than the flow sensors and is n...

Page 61: ...empted by anyone not having experience in the repair of devices of this nature In this section About alarms 4 2 Alphabetical list 4 4 Breathing system problems no alarm 4 13 Electrical problems power failure etc 4 14 Pneumatic problems 4 16 Alarm settings range and default values 4 17 ...

Page 62: ...malfunctions that prevent mechanical ventilation and or monitoring the area under the waveform shows minimum system messages During normal operation this area shows instructions push the knob etc Alarm priority depends on the level of danger to the patient High priority alarms require immediate attention AB 90 025 Alarms Priority Alarm tone Alarm silence Note High 10 tones 10 second pause repeat 1...

Page 63: ...on for example no PEEP Others prevent mechanical ventilation Minimum shutdown Patient monitoring These are high and low limit settings that you adjust Informational Control settings or system conditions can change operation For example if the audible circuit leak alarm is Off the screen shows Circuit Leak Audio Off as a low priority alarm ...

Page 64: ...w System in use for more than 12 hours without a power up self test To do the test move the system switch from Standby to On Not necessary informational A D Converter Failure Min shutdown High Ventilator malfunction Ventilate manually Monitoring is not reliable Contact a qualified service representative Absorber panel open Medium The top panel is not completely closed Push the breathing system int...

Page 65: ...fail Contact a qualified service representative Battery Failure High Low Battery voltage 16 V for 10 seconds Thesystemcontinuestooperate but may fail Contact a qualified service representative Battery Failure Low Low The battery voltage is too low 7 V to supply the system if power fails The battery does not have enough charge to power the equipment if power fails Leave the system plugged in to cha...

Page 66: ...able Contact a qualified service representative Display Voltage Out Of Range Minimum shutdown High Ventilator malfunction Ventilate manually Monitoring is not reliable Contact a qualified service representative Exp Flow Sensor Fail Low The system cannot read the calibrationdatastoredinthe sensor Operation continues with default values Replace the flow sensor Exp Reverse Flow Medium low after ackno...

Page 67: ...Flow Sensor Fail Low The system cannot read the calibrationdatastoredinthe sensor Operation continues with default values Replace the flow sensor Inspiration Stopped High Drive gas safety switch activated high internal pressure Adjust controls Check systems for blockages Insp Reverse Flow Medium low after acknowledged Flow through the inspiratory sensor during expiration for 6 breaths in a row Loo...

Page 68: ...tting Is the limit set correctly Is the O2 flow sufficient Does the sensor see 21 O2 in room air Calibrate O2 sensor Replace O2 sensor As sensors wear out the measured O2 decreases Low Paw Medium Paw does not rise at least 4 cm from the lowest pressure measured during the last 20 seconds Are circuit connections OK Look at the Paw gauge on the absorber Look for circuit disconnection Low Ve Medium E...

Page 69: ...n If the alarm clears restart mechanical ventilation Contact a qualified service representative No Circuit Module Low Ventilator malfunction Ventilate manually Opticalsensorslookfor tabs on the back of the module Is the module assembled are the sensors dirty No CO2 Absorption Medium low after acknowledged The absorber canister is open out of the circuit but the bypass mechanism prevents a leak opt...

Page 70: ...s activity Increase fresh gas flow Look for high flow through gas scavenging Calibrate the flow sensors b With active scavenging check the negative relief valve on the receiver PEEP Not Achieved Low Pmin does not reach within 2 cmH2O of PEEP by the end of mechanical expiration for 6 consecutive breaths Check tubing connections Rate and or I E ratio may prevent ventilator from reaching desired PEEP...

Page 71: ...qualified service representative Software Error Minimum shutdown High Ventilator malfunction Ventilate manually Monitoring is not reliable Contact a qualified service representative Software Watchdog Failure Minimum shutdown High Ventilator malfunction Ventilate manually Monitoring is not reliable Contact a qualified service representative Sustained Airway Pressure Minimum shutdown High Paw 100 cm...

Page 72: ...a When power is first turned on b Flow sensors are also used to measure pressures c The sustained pressure threshold is calculated from the pressure limit setting When mechanical ventilation is on the sustained limit is calculated as follows for pressure limits 30 cmH2O the sustained pressure limit is 6 cmH2O for Plimit between 30 and 60 cmH2O the sustained limit is 20 of the pressure limit Plimit...

Page 73: ...and Strerilization The bellows fills when the Bag Vent switch is set to Bag or the bag fills when the switch is set to Vent Leak through Bag Vent switch Ask a qualified service representative to repair the system The ventilator does not read the position of the Bag Vent switch Use manual ventilation if necessary Ventilator or absorber malfunction Ventilate manually Ask a qualified service represen...

Page 74: ...electrical socket An internal fuse is open Have a qualified service representative repair the system One electrical outlet does not have power The outlet circuit breaker is open Close the circuit breaker A circuit breaker opens frequently Equipment connected to the outlet s figure 4 1 uses more current than the circuit breaker rating Use a different power supply for some of the equipment The equip...

Page 75: ... Troubleshooting 1009 0633 000 4 15 1 Inlet Circuit Breaker 2 Mains Indicator 3 Outlet CIrcuit Breakers 4 Open No power 5 Closed OK Labels show ratings Figure 4 1 Circuit breakers and the mains indicator 1 2 3 5 4 ...

Page 76: ...ut is tight Low pressure leak test fails with a vaporizer on The vaporizer is not correctly installed Correctly install the vaporizer The vaporizer filler is loose fill port type vaporizer Tighten the filler Vaporizerporto rings external aredamaged or not installed Install new o rings A vaporizer malfunction the leak stops if you use a different vaporizer in the same position Send the vaporizer to...

Page 77: ...t Default Low O2 18 99 1 21 High O2 21 99 Off 1 Off Low VE Off 0 1 10 L min 0 1 L min 2 0 L High VE 0 5 30 off L min 0 5 L min 10 0 L Low VTE Off 5 1500 mL 5 mL if 20 mL 20 otherwise Off High VTE 20 1600 mL off 20 mL 1000 mL Circuit leak Audio on or Audio off n a Audio on Cardiac bypass No or In Progress n a No ...

Page 78: ...Aespire 7900 4 18 ...

Page 79: ...on lists user replaceable parts only For other components refer to the Technical Reference manual Flow sensor module 5 2 Breathing circuit module 5 3 Bellows 5 4 Absorber canister 5 5 Exhalation valve assembly 5 6 AGSS 5 7 Test tools and system parts 5 8 ...

Page 80: ... 82 019 Item Description Stock number Flow sensor module does not include flow sensors 1407 7001 000 1 Flow sensor cover 1407 3000 000 2 Flow sensor cuff 1407 3004 000 3 Flow sensor disposable plastic 1503 3856 000 Flow sensor autoclavable metal 1503 3244 000 ...

Page 81: ...ing circuit module does not include O2 cell O ring or cable 1407 7002 000 1 Check valves circuit lens 1407 3101 000 2 Check valve assembly 1406 8219 000 3 O ring for O2 cell 1406 3466 000 4 O2 cell 6050 0004 110 5 Cable O2 cell 1009 5570 000 Plug without O2 sensing 1407 3111 000 O ring for plug 1407 3112 000 ...

Page 82: ...500 3117 000 2 Bellows 1500 3378 000 3 Rim 1500 3351 000 4 Pressure relief valve assembly 1500 3377 000 5 Latch rim 1500 3352 000 6 Manifold bellows base 1407 3702 000 7 Bellows base with latch 1407 7006 000 8 Seal base 1500 3359 000 Diaphragm APL 1406 3331 000 Poppet APL valve 1406 3332 000 Cage APL 1406 3333 000 ...

Page 83: ...es 40 pack of foam does not include absorbent 1407 7004 000 2 Cover assembly CO2 canister 1009 8240 000 3 Foam CO2 canister pack of 40 1407 3201 000 4 O ring 1407 3204 000 5 Canister CO2 with handle 1407 3200 000 Multi absorber disposable white to violet pack of 6 8003138 Multi absorber disposable pink to white pack of 6 8003963 ...

Page 84: ...Aespire 7900 5 6 1009 0633 000 Exhalation valve assembly AB 82 035 Description Stock number Exhalation valve assembly 1407 7005 000 ...

Page 85: ... Thumbscrew M6 X 28 5 1406 3305 000 Thumbscrew M6 X 43 1406 3304 000 Valve unidirectional complete assembly 1406 8219 000 Passive AGSS Adapter outlet 30 mm female to 19 mm male pack of 5 1500 3376 000 Exhaust hose 8004461 Plug assembly 30 mm ISO 1407 3909 000 Screw shoulder 4 dia X 4 L M3 X 0 5 sst 1407 3915 000 Active AGSS adjustable flow Bag with 30 mm male connector 8004460 Plug assembly 30 mm ...

Page 86: ...19 800 Positive low pressure leak test device BSI 1001 8975 000 Positive low pressure leak test device ISO 1001 8976 000 Positive pressure leak test adapter 1009 3119 000 Ring sealing gasket for DIN 477 and O2 high pressure hose 1001 3812 000 Ring sealing gasket for N2O high pressure hose 1202 3641 000 Test lung 0219 7210 300 Test plug 2900 0001 000 Touch up paint Neutral Gray N7 Medium Dark 18 ml...

Page 87: ...System pneumatic circuits 6 2 System specifications 6 5 Electrical power 6 6 Electromagnetic compatibility 6 8 Physical specifications 6 15 Environmental requirements 6 15 Breathing system specifications 6 16 Ventilator theory 6 18 Ventilation operating specifications 6 23 Ventilator accuracy data 6 26 Suction regulators optional 6 28 Auxiliary O2 flowmeter optional 6 28 ...

Page 88: ...Pneumatic circuit diagram P P P 1 P P P P P P P P P DPL S 3 2 4 3 14 14 14 3 8 3 10 11 3 13 12 3 3 9 6 7 6 5 15 16 17 18 20 19 25 26 37 36 39 41 33 35 34 27 28 29 30 31 32 42 43 44 45 58 57 61 60 62 46 48 47 49 65 50 51 52 53 54 55 56 59 63 64 71 66 67 68 69 70 40 40 38 ...

Page 89: ...5 Vent to ambient 36 Balance regulator 37 Link 25 38 Air optional 39 Selectatec manifold 40 Vaporizer 41 5 5 psi pressure relief valve 42 Popoff valve 43 Exhalation valve 2 0 cm H2O bias 44 10 cm H2O 45 0 10 LPM drive gas 0 10 LPM patient and fresh gas 0 20 LPM total typical flow 46 200 mL reservoir 47 Negative pressure relief valve 48 Control bleed to ambient approximately 1 0 L min at 0 29 kPa 3...

Page 90: ...h uses pressure changes to monitor the position of the flush valve A message on the ventilator tells you when Flush is ON When the system switch is ON O2 flows to the rest of the system and there is a minimum flow through the O2 flowmeter A secondary regulator supplies a constant O2 pressure to the flow control valve An electrical switch monitors the O2 supply pressure If the pressure is too low a...

Page 91: ...r r r re e e eg g g gu u u ull l la a a at t t to o o or r r r o o o ou u u ut t t tp p p pu u u ut t t t p p p pr r r re e e es s s ss s s su u u ur r r re e e e Pin indexed The primary regulator is set to pressure less than 345 kPa 50 psi DIN 477 The primary regulator is set to pressure less than 414 kPa 60 psi P P P Pr r r re e e es s s ss s s su u u ur r r re e e e r r r re e e ell l lii i ie ...

Page 92: ...on 2 Cleaning and Sterilization Electrical power Supply voltage 100 120 or 220 240 Vac 10 at 50 or 60 Hz Inlet Circuit Breakers Outlet Circuit Breakers System leakage current limit do not exceed UL and CSA rated systems USA and Canada 300 µamps for the system and all systems connected to electrical outlets IEC rated systems Not USA and Canada 500 µamps for the system and all systems connected to e...

Page 93: ... charge state most of the time Batteries meet the following 1 Capacity to operate for 90 minutes under typical operating conditions 30 minutes under extreme conditions 2 Unit functions to specifications through the transition to battery power 3 Long float charge life 4 Battery pack has an auto resettable thermal fuse 5 Battery terminals and connecting wires are protected against short circuits Onl...

Page 94: ...signal input signal output cable must be supplied from an AC power source which uses a separating transformer in accordance with IEC 60989 or be provided with an additional protective earth conductor If a portable multiple socket outlet assembly is used as an AC power source it must comply with IEC 60601 1 1 The assembly must not be placed on the floor Using more than one portable multiple socket ...

Page 95: ...C 60601 1 2 test level Compliance level Electromagnetic environment guidance Electrostatic discharge ESD IEC 61000 4 2 6 kV contact 8 kV air 6 kV contact 8 kV air Floors should be wood concrete or ceramic tile If floors are covered with synthetic material the relative humidity should be at least 30 Electrical fast transient burst IEC 61000 4 4 2 kV for power supply lines 1 kV for input output line...

Page 96: ...re Anaesthetic System further from sources of power frequency magnetic fields or to install magnetic shielding The power frequency magnetic field should be measured in the intended installation location to assure that it is sufficiently low Note UT is the AC mains voltage before application of the test level Immunity test IEC 60601 1 2 test level Compliance level Electromagnetic environment guidan...

Page 97: ... 283 MHz and 40 66 MHz to 40 70 MHz The compliance levels in the ISM frequency bands between 150 kHz and 80 MHz and in the frequency range 80 MHz to 2 5 GHz are intended to decrease the likelihood that a portable communications device could cause interference if it is inadvertently brought into patient areas For this reason an additional factor of 10 3 is used in calculating the recommended separa...

Page 98: ...er not listed above the recommended separation distance D in meters m can be determined using the equation applicable to the frequency of the transmitter where P is the maximum output power rating of the transmitter in watts W according to the transmitter manufacturer Note 1 At 80 MHz to 800 MHz the separation distance for the higher frequency range applies Note 2 The ISM Industrial Scientific and...

Page 99: ...6 Specifications and Theory of Operation 1009 0633 000 6 13 Figure 6 2 Electrical block diagram 17 16 15 14 11 8 12 13 9 10 1 7 6 5 4 3 2 35 36 34 26 27 28 29 30 33 32 31 25 23 24 22 18 21 ...

Page 100: ...tch 14 Task light switch 15 Task light 16 RS232 port 17 Ventilator display module 18 Display connector board 19 EL display 20 Keyboard membrane switch 21 ComWheel 22 Ventilator engine board 23 Gas inlet valve 24 Flow control valve 25 Breathing system 26 Bag Ventilator switch 27 ABS on switch 28 Canister switch optional 29 CO2 bypass switch optional 30 Bulkhead connector 31 Expiratory flow sensor 3...

Page 101: ...cm D 9 in H x 13 in W x 10 6 in D Ventilator display 146 x 73 mm EL display 480 x 240 pixel Environmental requirements Temperature Humidity Altitude Height 136 cm 53 5 in Width 72 5 cm 28 5 in Depth 73 5 cm 28 9 in Weight 136 kg 300 lb Top shelf weight limit 35 kg 75 lb Operation 10 to 40 C Oxygen cell operates to specifications at 10 to 40 C Storage 25 to 65 C Oxygen cell storage is 5 to 50 C 10 ...

Page 102: ...ag g g ge e e e These values are for continuous pressure and are higher than those expected during mechanical ventilation 300 mL min total at 3 kPa 0 4 psi 75 ml min for all connectors and two part tubes and 225 mL min for all other breathing system assemblies S S S Sy y y ys s s st t t te e e em m m m c c c co o o om m m mp p p pll l lii i ia a a an n n nc c c ce e e e Volume of gas lost due to i...

Page 103: ...nging Particle filter at the outlet has a pore size of 225 microns All flow data uses a new filter Other market specific connectors may be available Pressure Bag Mode mL min Vent Mode mL min 30 cm H2O 50 50 60 cm H2O N A 106 90 cm H2O N A 163 Flow L min Flow L sec APL Pressure cm H2O 3 0 05 78 10 0 17 1 14 20 0 34 30 0 51 1 43 40 0 68 50 0 83 60 1 0 2 61 70 3 21 Disposal System Type Outlet Connect...

Page 104: ...n upstream of the breathing circuit There is no adjustment for compression in the patient circuit If necessary add the compression loss to the tidal volume setting volume control mode The average volume changes from compression in the breathing circuit is small 0 5 to 1 25 mL cmH2O For better precision When the fresh gas mixture includes Heliox use the Heliox mode Ventilation setup menu Heliox use...

Page 105: ...culates a flow based on the set tidal volume and the length of the inspiratory time T I to deliver that tidal volume It then adjusts that output by measuring delivered volumes at the inspiratory flow sensor Since the ventilator adjusts output it can compensate for breathing system compliance fresh gas flow and moderate breathing system leaks A typical volume controlled pressure waveform increases ...

Page 106: ...t airway pressure The ventilator automatically adjusts the flow to maintain the set inspiratory pressure Pressure control mode settings Pinspired control pressure Rate I E Plimit pressure limit PEEP SIMV mode 1 1 Mandatory SIMV breath 2 2 Spontaneous pressure supported breath Figure 6 7 SIMV diagram Synchronized Intermittent Mandatory Ventilation SIMV is a mode in which periodic volume breaths are...

Page 107: ... pressure supported ventilation with apnea backup PSVPro is a spontaneous mode of ventilation that provides a constant pressure once the ventilator senses that the patient has made an inspiratory effort The ventilator identifies an inspiratory effort using a flow trigger that is user adjustable In this mode the user sets the Pressure Support Psupport and PEEP levels The patient establishes the fre...

Page 108: ...e that the user has set If during this mode the patient takes spontaneous breaths in between the machine breaths the patient will receive pressure supported breaths 1 Mandatory pressure control breath 2 Spontaneous pressure supported breath Figure 6 9 SIMV PC PSV backup mode When the ventilator switches to the backup mode the alarm text Backup Mode Active will be displayed and will remain in the l...

Page 109: ...create the breathing profile PEEP is available and is additive Pressure mode settings Pinsp control pressure Rate I E Plimit pressure limit PEEP Minimum Monitoring Shows data No mechanical ventilation Monitoring Only alarm message Ventilate Manually and specific failure message The software goes to minimum monitoring when a non recoverable error occurs in boot up or normal operations Ventilation o...

Page 110: ...o 120 cm H2O Patient airway display range 20 to 120 cm H2O High pressure alarm set range 12 to 100cm H2O 1 cm increment Sustained pressure alarm range 6 to 30 cm H2O 1 cm increment Tidal volume display range 5 to 9999 mL 1 mL resolution Setting range 20 to 1500 mL Minute volume 0 0 to 99 9 liters Breath rate 4 to 100 bpm breaths per minute 1 bpm resolution Volume sensor type Variable flow orifice ...

Page 111: ...tored gas mixture A thermistor in the sensor s housing automatically compensates for temperature changes in the sensor The O2 monitor uses signal processing and analyzing circuitry to convert the sensor signal into a corresponding oxygen value The system displays this value and compares it to saved alarm limits If the value falls outside the limits the monitor produces the appropriate alarms Displ...

Page 112: ... provided on the next page The minimum detectable breath size is 5 0 mL Delivery accuracy Monitoring accuracy Measured values are taken at ambient temperature and pressure and are not corrected when displayed Volume control 210 mL tidal volume Better than 7 of set VT 100 O2 60 to 210 mL tidal volume Better than 15 mL 60 mL tidal volume Better than 10 mL Pressure mode Inspiratory pressure 2 0 cm H2...

Page 113: ...rors by approximately 0 95 volume agent When subjected to gas mixtures containing the following concentrations of gases the oxygen monitor has been tested to be within 5 of the actual gas concentration Gas mixtures other than the ones listed below may result in an accuracy of the oxygen monitor outside of the 5 V V 0 10 20 30 40 50 60 70 80 20 30 40 50 60 70 80 90 100 O2 N 2 O 10 5 10 Gas At conce...

Page 114: ...mm Hg with pipeline drive gas at 345 kPa 50 psi Minimum flow 20 L min Accuracy 5 of full scale Continuous suction regulator Supply External vacuum Vacuum levels 0 200 mm Hg and full line vacuum Maximum flow 20 L min Accuracy 5 of full scale Auxiliary O2 flowmeter optional Supply O2 from system gas supply Flow rates 0 10 L min Accuracy 5 of full scale not pressure compensated ...

Page 115: ...romagnetic interference 6 12 F filters 1 6 flow sensor module 3 4 flush valve 6 4 H high level disinfection 2 26 high pressure gas 1 9 K Krytox 3 3 2 15 L leakage current 1 7 M Malfunctions 4 3 mechanical ventilation 6 19 medical grade gas supplies 1 7 Medisorb 1 4 modifications to this equipment 6 8 O O2 sensor 6 25 O2 sensor cable connector 3 4 P patient leakage currents 6 7 Patient monitoring 4...

Page 116: ...Aespire 7900 I 2 1009 0633 000 ...

Page 117: ...ranties shall not apply if the Product has been repaired other than by Datex Ohmeda or in accordance with written instructions provided by Datex Ohmeda or altered by anyone other than Datex Ohmeda or if the Product has been subject to abuse misuse negligence or accident Datex Ohmeda s sole and exclusive obligation and Buyer s sole and exclusive remedy under the above warranties is limited to repai...

Page 118: ...Aespire 7900 User s Reference Manual English Part 2 1009 0633 000 10 04 A 01 21 03 Printed in USA Datex Ohmeda Inc All rights reserved ...

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