Dräger MIcroVent User manual

Operating Instructions MicroVent
MicroVent
Ventilator
Operating Instructions
Software 1.n
2-680-95
D

Operating Instructions MicroVent
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NOTICE
Proprietary Information
This document contains information in which Dräger, Inc. claimed proprietary
rights. The information may not be reproduced in whole or in part except as
authorized in writing by Dräger. This information is the property of Dräger, Inc.,
it is provided solely for the use intended.
Repairs/Modifications
Repairs on this device shall be performed only by DrägerService or its Authorized
Service Centers. Information about repairs can be obtained from Dräger or Au-
thorized Dealers. Dräger, Inc. will not be responsible for injury to persons or
damage to property arising directly or indirectly out of unauthorized repairs or
modifications to this device. Furthermore, any unauthorized repairs or modifica-
tions void any warranty extended by Dräger.
This document is provided for your information only. It will not be exchanged or updated
without request.
Trademarks
The Dräger name and logo are registered trademarks of Drägerwerk Aktienge-
sellschaft. The name MicroVent is a trademark of Drägerwerk Aktiengesellschaft.
Drägerwerk Aktiengesellschaft,1995
All rights reserved, Subject to modifications
Operating Instructions MicroVent

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Operating Instructions MicroVent
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Contents
5
Operating Instructions MicroVent
Page
Pressure-limited ventilation 35
Displaying Measured Ventilation Parameters 36
End of Operation 37
In Case of Loss of Electric Power 38
Time Limits for Battery Powered Operation 39
Alarms 41
Care 42
Disassembly 42
Disassembling the Patient Valve 43
Disassembling the Humidifier 43
Disinfecting/Sterilizing 44
Inspection and Maintenance 45
Preventive Maintenance 45
Changing a Fuse 46
In Case of Ventilator Malfunction 46
Extended Storage 46
Customer Service Mode 47
Troubleshooting 47
What's What 53
Front View 53
Rear View 54
Side View 55
Technical Data 56
Ambient Conditions 56
Performance Data 56
Alarms 57
Operating Data 57
Physical Characteristics 58
Certificates 58
Theory of Operation 59
Symbols for Pneumatic Components 59
Gas Supply 59
CMV/SIMV 59
CPAP 60
Parts List 61
Glossary 62
Ordering Information 63
Index 64
Contents
Page
Introduction READ THIS FIRST 6
Operator's Responsibility for Patient Safety 6
Limitation of Liability 6
Warranty 7
Definitions 8
General WARNINGS and CAUTIONS 8
Precautions During Preparation 9
Precautions During Operation 10
Precautions During Care 10
Precautions During Maintenance 11
Intended Use 12
Medical Attention 12
Ventilation With an Independent Manual
Ventilation Device 12
Overview 13
Front Panel 14
Preparation 15
Installing the Patient Valve 15
Pneumatic Connections 16
Electrical Supply 17
Gas Supply 21
Tests of Readiness for Operation 23
MicroVent Checklist 23
Connecting a Test Lung 24
Testing Ventilator Function 25
Testing O2Concentration 26
Testing Minute Volume Monitoring 26
Testing PEEP 27
Testing »Paw high« Alarm 27
Testing »Paw low« Alarm 28
Testing »Main supply« Alarm 28
Testing SIMV Synchronization 28
Testing Pressure Support Ventilation 29
Operation 30
Controlled Mandatory Ventilation (CMV) 30
Assist Control Ventilation 32
Synchronized Intermittent Mandatory
Ventilation (SIMV) 32
Continuous Positive Airway Pressure
(CPAP) / Pressure Support 34

Limitation of Liability
Dräger, Inc.'s liability, whether arising out of or related to
manufacture and sale of the goods, their installation,
demonstration, sales representation, use, performance,
or otherwise, including any liability based upon Dräger,
Inc.'s Product Warranty, is subject to and limited to the
exclusive terms and conditions as set forth, whether
based upon breach of warranty or any other cause of ac-
tion whatsoever, regardless of any fault attributable to
Dräger, Inc. and regardless of the form of action (inclu-
ding, without limitation, breach of warranty, negligence,
strict liability, or otherwise).
THE STATED EXPRESSED WARRANTlES ARE IN LlEU
OF ALL OTHER WARRANTIES, EXPRESSED OR
IMPLIED, INCLUDING, WITHOUT LIMITATION,
WARRANTlES OF MERCHANTABILITY, FITNESS FOR
ANY PARTICULAR PURPOSE, OR NONINFRINGE-
MENT.
Dräger, Inc. shall not be liable for, nor shall buyer be enti-
tled to recover any special incidental, or consequential
damages or for any liability incurred by buyer to any third
party in any way arising out of or relating to the goods.
Introduction
Operator's Responsibility for Patient Safety
For correct and effective use of the product and in
order to avoid hazards it is mandatory to carefully
read and to observe all portions of this manual.
The design of the equipment, the accompanying litera-
ture, and the labeling on the equipment take into con-
sideration that the purchase and use of the equipment
are restricted to trained professionals, and that certain
inherent characteristics of the equipment are known to
the trained operator. Instructions, warnings, and cau-
tion statements are limited, therefore, largely to the spe-
cifics of the Dräger design. This publication excludes
references to various hazards which are obvious to a
medical professional and operator of this equipment, to
the consequences of product misuse, and to potentially
adverse effects in patients with abnormal conditions.
Product modification or misuse can be dangerous.
Dräger, Inc. disclaims all liability for the consequences
of product alterations or modifications, as well as for
the consequences which might result from the combi-
nation of this product with other products whether sup-
plied by Dräger or by other manufacturers if such a
combination is not endorsed by Dräger, Inc..
The operators of the ventilator system must recognize
their responsibility for choosing appropriate safety mon-
itoring that supplies adequate information on equipment
performance and patient condition. Patient safety may
be achieved through a wide variety of different means
ranging from electronic surveillance of equipment per-
formance and patient condition to simple, direct obser-
vation of clinical signs. The responsibility for the selec-
tion of the best level of patient monitoring lies solely
with the equipment operator. (See also page 12, "Medi-
cal Attention").
Introduction Operator's Responsibility for Patient Safety
Limitation of Liability
6
Operating Instructions MicroVent

Application of this warranty is subject to the following
conditions:
1. Dräger, Inc. or its authorized representative must
be promptly notified, in writing, upon detection of
the defective material or equipment.
2. Defective material or equipment must be returned,
shipping prepaid, to Dräger or its authorized repre-
sentative.
3. Examination by Dräger, Inc. or its authorized repre-
sentative must confirm that the defect is covered
by the terms of this warranty.
4. Notification in writing, of defective material or
equipment must be received by Dräger, Inc. or its
authorized representative no later than two (2)
weeks following expiration of this warranty.
In order to assure complete protection under this
warranty, the Customer Registration Card and/or Peri-
odic Manufacturer's Service Record (if applicable)
must be returned to Dräger within ten (10) days of re-
ceipt of the equipment.
The above is the sole warranty provided by Dräger, Inc.
No other warranty expressed or implied is intended.
Representatives of Dräger are not authorized to modify
the terms of this warranty.
Dräger, Inc., Telford, PA
Warranty
All Dräger products are guaranteed to be free of defects
for a period of one year from date of delivery. The follow-
ing are exceptions to this warranty:
1. The defect shall be a result of workmanship or mate-
rial. Defects caused by misuse, mishandling, tam-
pering, or by modifications not authorized by Dräger,
Inc. or its representatives are not covered.
2. Rubber and plastic components and materials are
warranted to be free of defects at time of delivery.
3. Oxygen sensors capsules have a six-month limited
warranty from the date of delivery.
Any product which proves to be defective in workman-
ship or material will be replaced, credited, or repaired
with Dräger, Inc. holding the option. Dräger, Inc. is not
responsible for deterioration, wear, or abuse. In any
case, Dräger, Inc. will not be liable beyond the original
selling price.
Warranty Introduction
7
Operating Instructions MicroVent

General WARNINGS and CAUTIONS
WARNING !
If a fault is detected in the ventilator and its life-
support functions are in doubt, ventilation must
be started without delay with an independent
ventilation device (resuscitation bag) - using
PEEP and/or increased inspiratory O2concen-
tration where necessary and appropriate. The
unit should then be removed from use and ser-
viced by an authorized service technician.
WARNING !
Whenever a patient is connected to the ventila-
tor, constant attention by qualified medical staff
is required in order to provide immediate cor-
rective action in case of a malfunction.
The operator shall not rely on the built- in moni-
toring of the ventilator and must always assume
full responsibility for proper ventilation and pa-
tient safety in all situations.
WARNING !
DANGER, risk of explosion if used in the pres-
ence of flammable anesthetics.
This device is neither approved nor certified for
use in areas where combustible or explosive
gas mixtures with air or with nitrous oxide are
likely.
WARNING !
Strictly follow this Operator's Instruction Manual
Any use of the product requires full under-
standing and strict observation of all portions of
these instructions. The equipment is only to be
used for the purpose specified under "Intended
Use" (see page 12) and in conjunction with
appropriate airway monitoring (see page 6).
Observe all WARNINGS and CAUTIONS as ren-
dered throughout this manual and on labels on
the equipment.
Definitions
NOTE: A NOTE provides additional information
intended to avoid inconveniences during operation.
Inspection = examination of actual condition
Service = measures to maintain specified
condition
Repair = measures to restore specified
condition
Maintenance = inspection, service, and repair,
where necessary
Preventive = Maintenance measures at regular
Maintenance intervals
Typing conventions in this manual
Controls are designated as »Control Name« , e.g:
»PEEP«
Screen messages are printed in a window, e.g:
Self test O.K.
CAUTION !
A CAUTION statement designates the possibility of
damage to equipment if disregarded.
WARNING !
A WARNING statement refers to conditions with
a possibility of personal injury if disregarded.
Introduction Definitions
General WARNINGS and
CAUTIONS
8
Operating Instructions MicroVent

CAUTION !
Always use elbow connector for accurate flow
measurement.
WARNING !
Always use medical grade oxygen and air that is
dry and free from dust and oil. Contaminated gas
may cause ventilator malfunction.
WARNING !
Do not install flow restricting valves or flow me-
ters into the high pressure gas supply. Equip-
ment malfunction might result.
WARNING !
• Always use extreme caution when using oxygen!
• Oxygen intensely supports any burning!
No smoking, no open fire in areas where oxygen
is in use!
• Always provide adequate ventilation in order to
maintain ambient O2concentrations < 24 %
• Always secure O2cylinders against tipping, do
not expose to extreme heat.
• Do not use oil or grease on O2equipment such as
tank valves or pressure regulators. Do not touch
with oily hands. Risk of fire!
• Open and close valves slowly, with smooth turns.
Do not use any tools.
WARNING !
Treatment of batteries:
Do not throw into fire! Do not force open!
Do not attempt to recharge alkaline batteries!
Danger of bodily injury.
Follow all local, state, and federal regulations
with respect to environmental protection when
disposing of batteries.
WARNING !
Do not use antistatic (electrically conductive)
patient circuits or tubing.
Precautions During Preparation
WARNING !
Always use an independent oxygen analyzer to
monitor inspiratory oxygen concentrations.
WARNING !
Always verify that valve membrane is installed in
correct orientation. Ventilator malfunction will
occur if silicone membrane is reversed.
CAUTION !
Maintenance
In case of malfunction of this device, contact your
local DrägerService or our Factory Authorized
Technical Service Center.
The device must be inspected and serviced (pre-
ventive maintenance) by competent and factory au-
thorized technical service representatives at regu-
lar 6 month intervals. A record must be kept on this
preventive maintenance. We recommend obtaining
a service contract through your vendor.
Maintenance or repair of the MicroVent shall be per-
formed only by Dräger authorized technical service
representatives.
CAUTION !
Traceability
Federal Law in the United States requires tracea-
bility of this equipment. Please return the self ad-
dressed registration card included with the product
and fill in the required information.
CAUTION !
Restriction of Distribution
Federal Law and Regulations in the United States
and Canada restrict this device to sale by or on the
order of a physician.
General WARNINGS and
CAUTIONS (cont'd)
Precautions During Preparation
Introduction
9
Operating Instructions MicroVent

Precautions During Care
WARNING !
Water remaining in the ventilator valve or in the
pressure sensing lines for flow measurement
may cause ventilator malfunction.
WARNING !
Always follow accepted hospital procedures for
handling equipment contaminated with body
fluids.
WARNING !
Do not block air intake. Ventilator malfunction
will result.
WARNING !
Continuous or intermittent audible alarms re-
quire immediate operator attention to avert or to
prevent development of situations with the pos-
sibility of patient injury.
WARNING !
Automatic patient ventilation, volume measure-
ment, and alarms are not functional in case of a
loss of electric power!
Spontaneous breathing through the integrated
demand valve, however, is still possible in that
situation,
Immediately start ventilating patient with inde-
pendent manual ventilation device (resuscita-
tion bag) using PEEP and/or increased inspira-
tory oxygen concentration where necessary and
appropriate.
Precautions During Operation
WARNING !
Use CPAP mode only for patients who have suffi-
cient spontaneous breathing.
WARNING !
Observe pressure gauge in order to identify im-
proper ventilation. Operator must always be
ready to intervene if alarm indicates a situation
dangerous to the patient.
WARNING !
Always use ventilator that has been cleaned and
disinfected and has been successfully tested to
be ready for operation.
CAUTION !
For safety reasons, a battery pack must always be
installed, even when using external power sup-
plies!
CAUTION !
Do not pressurize the connector for pressure
sensing lines. It might destroy the internal sensor.
CAUTION !
Always use DC/DC converter 84 13 017 when
charging from a DC source.
CAUTION !
Always use AC adapter 84 12 709 for connecting
device to 120 V AC line voltage.
Introduction Precautions During Operation
Precautions During Care
10
Operating Instructions MicroVent

Precautions During Maintenance
WARNING !
If, in case of damage to the ventilator, the glass of
the LCD screen is broken, a liquid chemical may
be released that should not come into contact
with the skin. In case of contamination, wash off
with soap immediately.
WARNING !
Never operate the ventilator if it has suffered
physical damage or does not seem to operate
properly. In this case always refer servicing to
properly trained and factory authorized service
personnel.
WARNING !
Preventive Maintenance work on the MicroVent
ventilator may be performed by trained and fac-
tory authorized staff only.
WARNING !
To avoid any risk of infection, clean and disinfect
ventilator and accessories before any mainte-
nance according to established hospital proce-
dures - this applies also when returning ventila-
tors or parts for repair.
Precautions During Care (cont'd)
CAUTION !
Follow all accepted hospital procedures for disin-
fecting parts contaminated by body fluids (protec-
tive clothing, eyewear, etc.).
CAUTION !
Certain components of the ventilator consist of
materials that are sensitive to certain organic sol-
vents sometimes used for cleaning and disinfecting
(e.g., phenols, halogen releasing compounds,
oxygen releasing compounds, strong organic acids,
etc.). Exposure to such substances may cause
damage that is not always immediately recognized.
Sterilization of the ventilator itself with ethylene
oxide (EtO) is also not recommended.
CAUTION !
Do not use hard brush for cleaning.
Prevent any foreign objects from getting into the pa-
tient valve.
CAUTION !
Prevent any foreign objects from getting into the
ventilator valve.
Be careful not to damage the silicone membrane or
other disassembled parts.
CAUTION !
Prevent any foreign objects from getting into the flow
sensor.
Do not use pressurized air for cleaning, the orifice
membrane inside the flow sensor may become
damaged.
CAUTION !
When removing patient circuits, always handle at
end fittings! Otherwise, support helix may be torn at
end fitting or hose and fitting could come apart.
Precautions During Care (cont'd)
Precautions During
Maintenance
Introduction
11
Operating Instructions MicroVent

Medical Attention
Ventilation With an Independent Manual
Ventilation Device
WARNING !
If a fault is detected in the ventilator and its life-
support functions are in doubt, ventilation must
be started without delay with an independent
ventilation device (resuscitation bag) - using
PEEP and/or increased inspiratory O2 concen-
tration where necessary and appropriate. The
unit should then be removed from use and ser-
viced by an authorized service technician.
WARNING !
Whenever a patient is connected to the ventila-
tor, constant attention by qualified medical staff
is required in order to provide immediate cor-
rective action in case of a malfunction.
The operator shall not rely on the built- in moni-
toring of the ventilator and must always assume
full responsibility for proper ventilation and pa-
tient safety in all situations.
Intended Use
MicroVent – time-cycled, volume-constant ventilator for
patients with a body weight of at least 15 kg (33 lbs) up
to 150 kg (330 lbs).
Ventilation modes:
– controlled ventilation, CMV
– synchronised, controlled ventilation, Assist Control
– synchronised, intermittent mandatory ventilation, SIMV
– spontaneous breathing with positive airway pressure,
CPAP - with optional pressure- supported PS during
spontaneous breathing
With monitoring of:
– airway pressure, Paw
– expiratory minute volume, MV
– electrical power supply
– gas supply
The monitoring of inspiratory O2partial pressure must be
safeguarded with an independent O2monitor.
Areas of use:
– intensive care wards
– recovery rooms
– patient transports
Intended Use Medical Attention
Ventilation With an Independent
Manual Ventilation Device
12
Operating Instructions MicroVent

Overview
13
Operating Instructions MicroVent
2-682-95

➄On/off switch, ON/OFF
➅Pressure gauge for continuous display of airway
pressure
➆Liquid crystal display for
– measured parameter values (MV, PEEP,
Peak, Mean, I:E, Insp. flow)
– Alarms and advisory messages
with lkey to switch on display backlighting
and to display measured parameter values.
➇gkey to temporarily silence audible alarms and
to reset alarm messages after correcting the cause
of an alarm.
Overview
Front Panel
➀The knobs in the center of the front panel set:
–ventilator rate f
–tidal volume VT
–inspiratory time Tinsp.
➁Below, grouped together in one field, are the
knobs for:
–max. airway pressure Pmax Y
–minute volume alarm limits, MV Y
➂Next to this field, the knob for settting
– pressure support during spontaneous
breathing
– endexpiratory pressure, PEEP and positive
airway pressure, CPAP
➃Next to it, the switch for ventilation modes
–CMV / A/C or SIMV / CPAP
Overview Front Panel
14
Operating Instructions MicroVent
2-679-95

Preparation
Installing the Patient Valve
1Insert silicone membrane into open patient valve -
watch for correct orientation of membrane
2Put on lid and turn clockwise 90oto lock.
3Push expiratory valve into the opening on the
ventilator = nozzle pointing downwards.
4Screw or push O2sensor firmly into the O2sensor
adapter.
5Attach O2sensor adapter to nozzle.
●Connect ventilator circuit to nozzles.
Note suggested length of circuit segments
(in meters).
●Make sure watertraps are positioned vertically.
●Prepare humidifier according to its Operating
Instructions.
WARNING !
Do not use antistatic (electrically conductive)
patient circuits or tubing.
WARNING !
Always use an independent oxygen analyzer to
monitor inspiratory oxygen concentrations.
WARNING !
Always verify that valve membrane is installed in
correct orientation. Ventilator malfunction will
occur if silicone membrane is reversed.
Take care not to damage or bend rubber disc
inside patient valve. Ventilator malfunction will
occur.
Assembly Preparation
15
Operating Instructions MicroVent
2
1
3
D

1Attach flow sensor to wye.
2Push elbow connector onto flow sensor.
When using a bacterial filter
●Always connect bacterial filter to elbow connector as
shown.
●Push pressure sensing lines for flow measurement
onto flow sensor nipples – note different diameters of
hose ends and respective nipples.
Pneumatic Connections
1Attach gas supply line and tighten.
2Attach pressure sensing lines for flow measurement
to connector on MicroVent.
CAUTION !
Do not pressurize this connector for pressure
sensing lines. It might destroy the internal sensor.
CAUTION !
Always use elbow connector for accurate flow
measurement
Preparation Assembly
16
Operating Instructions MicroVent
12
4
3

Electrical Supply
The MicroVent ventilator is designed for different
types of electrical supply.
Internal supply
with either rechargeable (NiCd) or non-rechargeable
(alkaline) internal battery pack.
External supply
with AC adapter (part no. 84 12 709) from 120 V AC
line voltage for recharging of battery pack and for ex-
tending operation when using battery packs.
Use with internal rechargeable battery pack or alka-
line batteries
CAUTION !
For safety reasons, a battery pack must always be
installed, even when using external power supply!
CAUTION !
Always use AC adapter 84 12 709 for connecting
device to 120 V AC line voltage.
Electrical Supply Preparation
17
Operating Instructions MicroVent
CAUTION !
The internal battery pack will last for up to 2 hours
of operation. Keep additional, fully charges battery
packs on hand for backup if external sources might
not be available for more than 2 hours
CAUTION !
When exchanging the internal battery pack during
operation, always assure that ventilation can be
provided with an independent ventilation device
(resuscitation bag)while the MicroVent is discon-
nected from power.

Installation
- before first use
- when, during charging NiCds, the display shows
- and as part of preventive maintenance
every 2 years.
NOTE: Always use battery holder, part no. 18 35 505,
in battery compartment
• Undo screw in lid of battery compartment (use
coin) and remove lid.
CAUTION !
Always use alkaline batteries, type IEC LR6
(AA batteries).
Defective NiCd
Preparation Electrical Supply
18
Operating Instructions MicroVent

• Remove and disconnect defective or discharged
battery pack.
• Remove used alkaline batteries from battery holder
and replace with 6 new batteries (where applicable).
NOTE: Watch for correct polarity when inserting new
batteries.
• Attach plug of fresh battery pack to receptacle in
battery compartment and insert pack.
• Install lid and tighten screw
The ventilator can be operated for about 2 hours with a
fresh set of batteries.
For advisory or alarm messages, see table
"Troubleshooting" on pages 50-52.
Charging NiCd batteries
NOTE: NiCd batteries will slowly discharge even while
connected to an external power supply. It takes about
2 years for batteries to discharge completely under
those circumstances
NOTE: Always charge at ambient temperatures of
32 ºF to 95 ºF (0 ºC to 35 ºC)!
CAUTION !
Always use AC adapter 84 12 709 for connecting
device to 120 V AC line voltage.
WARNING !
Treatment of batteries:
Do not throw into fire! Do not force open!
Do not attempt to recharge alkaline batteries!
Danger of bodily injury.
Follow all local, state, and federal regulations
with respect to environmental protection when
disposing of batteries.
PreparationElectrical Supply
19
Operating Instructions MicroVent
+ +
–
– –
+

When external voltage is connected:
• the green status light = "DC power available"
will be on, independent of whether the ventilator is
turned »On« or »Off«. The internal battery pack is
now being charged.
• Display while ventilator is turned off:
• It takes about 5 hours to recharge a completely
discharged NiCd battery pack.
• Display while ventilator is turned off:
At room temperature, the ventilator can be operated
for about 2 hours with a fully charged NiCad battery
pack.
• Near the end of battery capacity,
the ventilator displays
Approximately 10 minutes of operation remain at
the time of this message.
NOTE: Low ambient temperatures and the actual
condition of the rechargeable batteries may reduce
operating times.
Use with external DC supply
Voltage fluctuations in on-board supplies can be sig-
nificant, e.g. due to varying load conditions. They may
exceed the input tolerances specified for MicroVent .
The DC/DC converter conditions these types of sup-
plies to provide a constant voltage of approximately
12 V DC.
• Attach cigarette lighter adapter plug to DC source,
plug other end into external DC input jack on top
of ventilator.
CAUTION !
Always use DC/DC converter 84 12 017 when
using a DC source.
Charge NiCd
Stand-by
NiCd charged
Stand-by
NiCd charging
Electrical Supply
Preparation
20
Operating Instructions MicroVent
D
1
12 V DC
24 V DC
28 V DC