Getinge Flow-i Bedienungsanleitung

mars 25, 2020

Stockholm, Sweden

To whom it may concern

Maquet Critical Care AB

Röntgenvägen 2

S-17154 Solna

Sweden

www.getinge.com

CUSTOMER NOTIFICATION LETTER

COVID-19 Pandemic

Ventilating ICU patients using Flow-i, Flow-c and Flow-e

anesthesia machines

Dear all,

In view of the situation with the coronavirus, Novel Coronavirus (2019-nCoV), and the possibility to

repurpose Flow-i, Flow-c and Flow-e anesthesia machines for use in the ICU as a ventilator only,

Getinge would like to draw your attention to important information in the following three sections:

1. General information and warnings

2. Preparations for use

3. Key system differences (between Flow anesthesia machines and ICU-ventilators)

Rebreathing

Manual and automatic ventilation (MAN/AUTO) and APL

O2flush

Sampling line and watertrap

AGSS (Anesthesia Gas Scavenging System)

Emergency ventilation

Alarms and monitoring

System checkout

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1. General information and warnings

As outlined in the user manuals the Flow family systems are intended for use:

in administrating anesthesia while controlling the entire ventilation of patients with no

ability to breathe, as well as in supporting patients with a limited ability to breathe.

by healthcare professionals, trained in the administration of anesthesia

on neonate to adult patient populations.

hospital environments, except MRI environments.

When not in operation, the systems are designed for in-hospital transport.

The following information is being provided as a guidance. Using the anesthesia device outside of

the intended use as specified in the user manual and as noted above (e.g. long-term ventilation) is

considered off-label use. If the user (health care provider) decides to use the anesthesia device

off-label, he/she is responsible to make this determination and so at his/her own (liability) risk. The

risk benefit assessment has to be made by the responsible health care provider based on the

circumstances. Please also be aware that this information is only intended for the duration of the

COVID-19 emergency.

Maquet Critical Care AB is providing the following information for a better understanding of how the

anesthesia device functions so that the health care provider can make the decisions on how to

proceed when using a Flow-i, Flow-c and Flow-e anesthesia system for use in the ICU as a

ventilator only.

Please be specifically aware of the following:

-The devices are specified for a usage during surgical or diagnostic interventions under

constant supervision of a trained user. It is therefore important that the personnel using the

anesthesia device is familiar and well trained of the user interface, the controls and the

alarms of the machine or that the user is supervised by someone who is. This has to be

determined by the health care provider based on the situation on the site.

-Certain patients are susceptible to malignant hyperthermia and it is therefore important to

prepare the anesthesia device prior to treating such patients. Make sure to follow the

instructions in the Cleaning and Maintenance Manual (for US - MCV00011319_REVA).

-The User manual states that a resuscitator always must be available at the anesthesia

device to mitigate if any mal-functioning of the device should occur that disturbs the oxygen

intake of the patient.

-The anesthesia device is designed with alarms that are constantly supervised by the user

and safety measures that are dependent on user presence. The healthcare provider must

be aware of this and take appropriate actions so that it is always possible to react on

alarms perform safety measures.

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-Please be aware that nebulization of drugs is not approved with this anesthesia device.

Using aerosol therapy might affect the device negatively causing malfunctinon.

-The anesthesia device is not validated or intended for use with active humidication. Should

this nevertheless be used the HME filter at the y-piece cannot be connected to the system,

as the humidification created will be filtered by the HME filter and will thus not reach the

patient. This will most likely also result in excessive condensate in the anesthesia device. If

active humidification is used the system shall run with high fresh gas flows and be

equipped with filters on both the inspiratory and expiratory limbs and close monitoring of

the ventilatory and patient parameters is mandatory. Dual heated breathing circuits should

not be used.

-If inhalation anesthestic agents are used as sedation the user must be aware of that the

surplus of the agents could be transported out into the environment. It is therefore

important to connect an Anesthesia Gas Scavenging System (AGSS) to the system.

-Reprocessing of applicable parts of the the anesthesia device shall be performed

according to the information in the Cleaning and Maintenance Manual, ie between each

patient after treating a known carrier of pulmonary contagious agents.

-Please ensure that the system has the latest avaliable software installed.

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2. Preparations for use

For more detailed information see section 3 in this letter.

Check that the manual resuscitator is readily available and is working correctly.

Remove the vaporizers by lifting up the front and gently pulling outwards.

If the system is equipped with N2O gas module and/or with the alarm options Mute Apnea Alarms

and/or HLM/CPB (heart lung machine mode/cardio

pulmonary bypass) these should be turned off in the

Service & Settings menu. The alarm modes above will

silence and, for HLM/CPB, disable crucial alarms and

are not to be used in the ICU. Please contact a certified

Getinge trained service engineer to assist.

Connect breathing circuit according to user manual.

Use a high quality antiviral HMEF (heat and moisture

exchange filter) placed between the breathing circuit and the patient’s airway, this will protect the

machine from contamination.

The gas sampling line should be connected to the HMEF on the machine side of the filter to ensure

sampled gas is not contaminated as it enters the water trap.

Make sure to use an expiratory bacterial/viral filter, to minimize cross-contamination. Make sure to

follow the filter manufacturer’s recommendations for exchange interval of the filters.

Perform a system checkout (SCO) according to instructions on screen.The test will take 6-8 minutes.

Back-up gas cylinders are included in the check out procedure should they be connected.

Set alarm sound level to 100% and modify alarm limits accordingly

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3. Key system differences

Rebreathing

The most significant difference between intensive care ventilators anesthesia devices is that

anesthesia ventilators are based on a rebreathing system and adjustable fresh gas flows. This

means that depending on the set fresh gas flow, expired gases will be rebreathed.

If non-rebreathing is desired, we recommend the user to set the fresh gas flow higher than the

patients expired minute volume. If the user to set the fresh gas flow to 20 l/min, the system is

designed to automatically adjust the fresh gas flow to just above the patient’s minute volume and

thus guarantee a non-rebreathing system.

If the fresh gas flow is set to less than expired minute volume, part of the expired gas will be

returned to the inspiratory limb.

In a circlular system, expiratory gas is purified in the CO2 absorber before it is mixed with fresh gas

and delivered to the patient. This requires the use of a CO2absorber to prevent high CO2levels in

the circuit.

Please be aware that if high fresh gas flows are used, the CO2 absorber will not be part of the

breathing circuit and thus not be consumed.

When the gas passes through the soda lime, CO2is absorbed and water and heat are produced. A

higher rebreathing fraction could thus humidify and warm inspiratory gases and may make active

humidification redundant.

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Anesthesia machine operators should change the absorber when the absorption material changes

from white to pink/violet as the measured inspired CO2increases (indicating no more CO2can be

absorbed). The activation of an inspiratory CO2-high alarm limit helps to directly inform the user

about undesired levels of inspiratory CO2 (FiCO2).

Another very important aspect of using rebreathing is that due to patient oxygen consumption and

dilution effects within the circle system, the inspired O2-level might differ to that of the set O2

concentration in the fresh gas delivered from the system. Make sure to continuously

monitor inspired and expired values of O2, (FiO2, EtO2) and CO2(FiCO2and EtCO2).

Should the FiO2decrease below 21% the Flow anesthesia system has a built in safety feature,

O2Guard, that will automatically set the O2setting to 60% and, if set lower, raise the fresh gas flow

to 1 l/min. Please see the User Manual for further information.

Manual and automatic ventilation (MAN/AUTO) - APL

Manual ventilation is carried out using a traditional breathing

bag connected to the patient cassette through a breathing

bag tube. During manual ventilation the ventilator is passive

which means that the patient is not ventilated unless the

manual bag is pressed and the APL is set accordingly.

The MAN/AUTO ventilation switch is an electrical switch

used to select manual or automatic ventilation. The APL

(adjustable pressure limit) valve relieves the patient circuit of

excess pressure at user defined values and ventilates the

gas into the Anesthetic Gas Scavenging System (AGSS).

When the MAN/AUTO switch is set to “MAN” the manual

ventilation valve opens and the manual ventilation bag is

connected to the breathing system.

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O2flush

Pressing the O2flush button manually supplies the system with an additional gas flow of approx. 50

l/min from the O2gas supply. The flow will continue as long as O2flush button is depressed. During

the O2flush activation, the system will hold the set PEEP.

Sampling line and water trap

Always connect the sampling line to the HME-filter located on the endo-tracheal tube, this will

minimize the risk of contaminating the anesthesia machine.

The Flow anesthesia machines are equipped with a side-stream multigas analyzer with an

integrated O2sensor. The length and inner diameter of the sampling line determine how long time it

will take before the gas data and curves information is displayed on the screen. There will, in

other words, be a delay in values and waveforms of several seconds compared to the ICU-

ventilators. Connection of several sampling lines in order to extend the line’s reach will increase

this time.

The water trap, sampling line and connectors are all part of a system optimized for the patient gas

analyzer to protect it from condensed water, secretions, bacterial contamination and dust. The

water trap comprises a filter housing (with hydrophobic anti-bacterial filter), and a water container

for separated waste. The filter housing has one gas sampling inlet that is connected to the

sampling tube.

The sampling line is not reusable and must be replaced between patients or when the cleanliness

of the tubing or connector is compromised.

Check the water trap and sampling line regularly and discard/empty any water present in the water

trap. Empty or discard the water trap after 17 hours of active use, or when half full. The content of

the water trap should be handled as as biological hazardous waste.

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AGSS (Anesthesia Gas Scavenging System)

Caution: If inhalational anesthetic agents are used it is important to ensure that the machine is

connected to a scavenging system as describe in the manual.

When the AGSS is connected to the rear of the system, the flowmeter on the front indicates the

rate of evacuation.The minimum level of evacuation flow is indicated by the floater being above the

dashed area, corresponding to a flow of approx. 25 l/min. If the central scavenging system is

inactive, the gases will be emitted into the room.

Emergency ventilation

Allows patient to be manually ventilated in case of system failure

(i.e mains power and battery) or other electronic failure and is

accessible behind cover on front of machine. Replaces fresh gas

flow (with 100% O2) and electronic APL function.

During emergency ventilation the system cannot deliver anesthetic

agents.

Alarms and monitoring

An anesthesia machine is designed for presence of a trained specialist by it´s side.

There are no lamps or remote monitoring, once an alarm is no longer valid it is not audible

or visible anymore and the sound of the alarms in general are lower than an ICU-ventilator.

Taking this into consideration it is crucial that the clinician in charge has full control of the screen

for the visual alarms and the sound turned up to 100%.

Alarm limits will need to be adapted for each patient.

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The alarm area on the screen can display up to three alarms, listed in order of severity.Should

there be more ongoing alarms a number will be visible to the right (in this case 4). Pressing the

number shows up to 10 ongoing alarms.For previous alarms press “trends” on the same page.

Leakage

Should a leakage occur an alarm will be activated. In general the leakage will not be compensated.

This is especially important during volume controlled ventilation modes. It´s important to find the

source of leakage in order to rectify it as well as following of the patient´s vital signs and ventilation

metrics.

System checkout

To ensure correct system functionality, optimal performance and patient safety, the System checkout

procedure must be performed once a day, or before connecting the first patient within a running 24 hour

period. Should the duration of the treatment exceed this period a message prompting the user to perform a

new system checkout will appear. The system will continue to ventilate independent of this message that will

remain as a reminder. With risk for minor device malfunctiong after 24 h, such as drifting values, it is

possible to continue ventilation for 72 h before conducting System checkout. In order to perform a new

system checkout the system needs to be in Standby and thus the patient needs to be disconnected from the

ventilator and manually ventilated with a resuscitator. The test will take 6-8 minutes Make sure to document

the settings before going to Standby as the machine will reset to startup configurations.

If you have any questions or remarks to this topic, please do not hesitate to contact your local

Getinge representative.

Yours sincerely,

Miray Kärnekull, MD Lena Evander

Medical Director Product Management Anesthesia

Maquet Critical Care AB Maquet Critical Care AB

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