Mindray VS-800 User manual

WATO EX-65 Anesthesia Machine

Quick Guide

Shenzhen Mindray Bio-Medical Electronics Co., Ltd.

This guide contains the basics necessary to operate the product safely and quickly. For details, refer to the Operator's Manual.

Notes:

Observance of this guide is a prerequisite for proper product performance and

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correct operation and ensures patient and operator safety.

This guide is based on the maximum conﬁ guration and therefore some contents

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may not apply to your product. If you have any question, please contact us.

The product bears CE mark indicating its conformity with the provisions of the Council Directive 93/42/EEC concerning medical

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devices.

rights reserved. Contents of this guide are subject to change without prior notice.

Product Introduction

1.Brake

Pipeline pressure gauge

3.Total ﬂ owmeter

4.Flow control

5.Electronic ﬂ owmeter

6.Ventilator control panel

7.Control knob

8. Display

9.Vaporizer

10.Gas supply connector

11.System switch

12.Cylinder pressure gauge

13.O2 ﬂ ush button

14.

Auxiliary electrical outlet

15.Drawer lock

16.Worktable (with drawer)

Product Introduction

1.O2 sensor connector

Inspiration connector

3.Expiration connector

4.Inspiratory check valve

5.Expiratory check valve

6.Bellows housing

7.Sample gas return port

8.Manual bag port

9.Bag/mechanical ventilation switch

10.APL (Airway Pressure Limit) valve

11.O2 sensor connector

12.Rotary handle

13.Sodalime canister

Product Introduction

1.Cylinder connector

2.Equipotential stud

3.Fan

4.Mains inlet

5.Network connector

CIS 12 V power supply

6. connector

7.Speaker

8.Auxiliary O2 supply

9.ACGO (Auxiliary Common Gas Outlet) switch

10.Module slot

11.AGSS outlet

12.AGSS Transfer and Receiving System

Control Panel

The control panel is located beneath the ventilator display, as shown below:

123 4 5 6 7 8

1. Battery LED

2. AC power LED

3. Operating state LED

4. Alarm silence key To set alarm silence state, push this key to enter 120 s alarm silenced

status. The alarm silence symbol and 120 s countdown time appear in

the upper right corner of the screen. To clear alarm silence, push this key again.

5. Standby key

Push to enter or exit standby mode.

6. Normal screen key

Push to clear all menus popping up on the screen and return to the normal screen.

7. MV&TVe alarm key

In case of manual ventilation mode: Push the key to switch off MV and TVe overrange alarms and apnea alarm. Push the key again to switch on MV and TVe overrange alarms and apnea alarm.

In case of mechanical ventilation mode: Push the key to switch off MV and TVe overrange alarms. Push the key again to switch on MV and TVe overrange alarms.

8. Control knob

Push the control knob to select a menu option or conﬁ rm your setting. Turn the control knob clockwise or counterclockwise to scroll through the menu options or change your settings.

Display Screen

This anesthesia machine adopts a high-resolution color TFT LCD to display various parameters, spirometry loops and waveforms (airway pressure, flow, volume, EtCO2, etc).

The following is a standard display screen. For descriptions of other screens, refer to Operator's Manual.

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1. Ventilation mode prompt area

Displays the current ventilation mode. If manual ventilation is selected for the bag/mechanical ventilation switch, the currently selected mechanical ventilation mode is displayed.

2. Lung icon

The icon is displayed when SIMV-VC or SIMV-PC mode is selected and inspiration triggering action is done currently.

is displayed in this area. Otherwise,

Display Screen

3. MV&TVe alarm off icon

4. Physiological alarm area

5. Apnea alarm off icon

6. Alarm silence icon area

7. System time

8. Technical alarm area

9. Power supply state icon area

Displays power source or battery icon. The icon

the anesthesia machine is powered by AC power source. The battery icon is displayed when the anesthesia machine is battery powered to indicate battery capacity.

10.[Vent Mode] shortcut key

Used to select mechanical ventilation mode.

11.[Alarm Setup] shortcut key

Used to change the alarm settings for the anesthetic ventilator, gas module or BIS module.

12.[Screens] shortcut key

Used to set user screen.

13.[User Setup] shortcut key

Used to change the settings for TV compensation, O2 monitoring source, gas module, BIS module, screen, sound etc.

14.[Maintenance] shortcut key

Used to perform leak test, calibrate O2 sensor and ﬂ ow sensor, view trend graph, trend table and alarm logbook, and set language, system time, pressure unit, IP address etc.

15. Timer Setup shortcut key

16. Parameter Setup shortcut keys area

Used to set the parameters related to mechanical ventilation mode. Shortcut keys arrangement is subject to speciﬁ c mechanical ventilation mode.

17. System prompt message area

18. Parameter & graph area

Displays the parameters, waveforms, spirometry loops, or electronic ﬂ owmeter graphs which the anesthetic ventilator, gas module, or BIS module monitors. Different types of screens are displayed based on the actual system conﬁ guration or screen layout settings.

is displayed when

Inspect the System

Make sure that:

The anesthesia machine is undamaged.

All components are correctly attached.

The breathing system is correctly connected, and the breathing tubes are undamaged.

The vaporizers are locked in position and contain sufﬁ cient agent.

The gas supplies are connected and the pressures are correct.

Cylinder valves are closed on models with cylinder supplies.

The necessary emergency equipment is available and in good condition.

Equipment for airway maintenance and tracheal intubation is available and in good condition.

Applicable anesthetic and emergency drugs are available.

10.

The casters are not damaged or loose and the brake is set and prevents movement.

11.

The breathing system is locked (in the

12.

The AC mains indicator and the battery indicator come on when the power cord is connected to the AC power source. If the indicators are not on, the system does not have electrical power.

13.

The anesthesia machine is switched on or off normally.

NOTE

Make sure that the breathing system is correctly connected and not

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damaged. The top shelf weight limit is 30 kg.

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position).

Preoperative Test

Test Intervals

Perform the preoperative tests listed below at these events:

1.Before each patient.

2.When required after a maintenance or service procedure.

The following table indicates when a test must be done.

Test Item Test Intervals

Pipeline tests

Every day before the ﬁ rst patientCylinder tests

Flow control system tests

Inspect the system

Alarm tests

Power failure alarm test

Before each patient

Breathing system tests

O2 Flush Test

Preoperative preparations

NOTE:

Read and understand the operation and maintenance of each component

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before using the anesthesia machine. Do not use the anesthesia machine if a test failure occurs. Contact us

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immediately. Within the warranty period, check the sealing condition only. When a great

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deviation occurs to the pressure value or the ﬂ ow value that is measured, contact the authorized engineer for calibration service.

Turn on the System

Connect the power cord to the AC power source.Make sure that the AC power LED is illuminated.

Set the system switch to ON.Make sure that both the operating state LED and battery LED are illuminated (the battery is being charged or fully charged).

The alarm lamp ﬂ ashes yellow and red once in turn and then a beep is given.

The display shows the start-up screen and then enters the standby screen after half a minute.

WARNING

Do not use the anesthesia machine if it generates alarms when turned on, or

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can not operate normally. Contact your service personnel or us.

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Input Fresh Gas

Connect the gas supplies correctly and ensure adequate gas pressure.

You can control the O2, N2O and AIR ﬂ ows in the fresh gas through the O2, N2O and AIR ﬂ ow controls. Readings of the gas ﬂ ows can be seen on the respective ﬂ owmeters.

If inspiratory anesthetic agent is used, ensure that the vaporizer is correctly mounted onto the anesthesia machine and the vaporizer conforms to the the anesthetic agent to be used. Fill the vaporizer with the anesthetic agent properly.

Push and turn the concentration control on the vaporizer to set the appropriate concentration of anesthetic agent.

NOTE

This anesthesia machine can be mounted with vaporizers corresponding with

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halothane, enﬂ urane, isoﬂ urane, sevoﬂ urane and desﬂ urane. Only one of the ﬁ ve vaporizers can be opened at a time because the vaporizers are featured

with interlock.

Mechanical Ventilation Mode

Ventilation Mode

Make sure that the system is Standby.

Set the appropriate Plimit value in the parameter setup shortcut keys area.

Check the ACGO switch to make sure that it is OFF .

Set the bag/mechanical ventilation switch to the position.

Push the O2 ﬂ ush button to inﬂ ate the bag if it collapses.

Select the [Vent Mode] shortcut key to open the [Vent Mode Setup] menu. Select ventilation mode.

Set Ventilator Parameters

Select the parameter setup shortcut key to set the parameters related to mechanical ventilation mode.

Set Alarm Limits

Select the [Alarm Setup] shortcut key and then [Ventilator >>].

Set [High Limit] and [Low Limit] respectively for each parameter.

Select the [Alarm Setup] shortcut key and then [Gas Module >>].

Set [High Limit] and [Low Limit] respectively for each parameter.

Start Mechanical Ventilation

After settings of the related parameters are already made, you can enter

mechanical ventilation mode by pushing the Standby key and then selecting

[Ok] from the pop-up menu to exit the standby status. The system will work in the selected mechanical ventilation mode.

NOTE

Before starting a new mechanical ventilation mode, make sure that all related

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parameters are set to the appropriate values.

Mechanical Ventilation Mode

Stop Mechanical Ventilation

Make sure that the APL valve is set properly before stopping mechanical ventilation. The APL valve adjusts the breathing system pressure limit during manual ventilation. Its scale shows approximate pressure.

Set the bag/mechanical ventilation switch to the position. This selects

manual ventilation and stops mechanical ventilation (ventilator).

NOTE

Before applying mechanical ventilation, check the sodalime in the canister. If

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sodalime color changes signiﬁ cantly, replace the sodalime promptly.

Manual Ventilation Mode

Start Manual Ventilation

Turn the APL valve control to adjust the pressure in the breathing system within the appropriate range.

Set the bag/mechanical ventilation switch to the position. The ventilation

mode prompt area displays the icon for manual ventilation mode. Besides, the system prompt message area displays [Manual Vent.].

Press the O2 ﬂ ush button to inﬂ ate the bag if necessary.

Set Alarm Limits

Select the [Alarm Setup] shortcut key and then [Ventilator >>].

Set [High Limit] and [Low Limit] respectively for each parameter.

Select the [Alarm Setup] shortcut key and then [Gas Module >>].

Set [High Limit] and [Low Limit] respectively for each parameter.

Turn off the System

To turn off the system, do as follows:

Conﬁ rm that system use is ﬁ nished.

Set the system switch to OFF.

Cleaning and Disinfection

WARNING

Obey applicable safety precautions.

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Read the material safety data sheet for each cleaning agent.

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Read the operation and service manual for all disinfection equipment.

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Wear gloves and safety glasses. A damaged O2 sensor can leak and cause

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burns (contains potassium hydroxide).

Reuse of undisinfected breathing system or reusable accessories may cause

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cross-contamination.

Preoperative tests must be performed before patient use every time the

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anesthesia machine has been disassembled for cleaning and disinfection, or has been reassembled.

To prevent leaks, avoid damaging any component in case of disassembling

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and reassembling the breathing system. Ensure the correct installation of the system, especially of the seal. Make sure of the applicability and correctness of the cleaning and disinfection methods.

Disassemble and reassemble the breathing system as described in this guide.

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For further disassembly and reassembly, contact us. Improper disassembling and reassembling may cause breathing system leak and compromise normal system use.

NOTE

To help prevent damage, refer to the manufacturer’s data if you have questions

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about a cleaning agent.

Do not use organic, halogenated, or petroleum based solvents, anesthetic agents,

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glass cleaners, acetone, or other harsh cleaning agents.

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Do not use abrasive cleaning agents (such as steel wool, silver polish or cleaner).

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Keep all liquids away from electronic parts.

Do not permit liquid to go into the equipment housings.

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Do not soak synthetic rubber parts for more than 15 minutes. Otherwise swelling

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or faster aging may occur.

Only autoclave parts marked 134ºC.

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Cleaning solutions must have a pH of 7.0 to 10.5.

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Cleaning and Disinfection

All parts of the breathing system can be cleaned and disinfected. The cleaning and disinfection methods are different for different parts. You need to select the appropriate method to clean and disinfect the parts based on the actual situations to avoid cross-contamination.

This table is our recommended cleaning and disinfection methods for all parts of the breathing system.

Parts

Breathing tubes and Y piece

Breathing mask

Flow sensor

Bellows assembly

Inspiratory and expiratory check valves assembly

O2 sensor

Canister assembly

Canister connection block assembly

Water collection cup

Bag arm

BYPASS assembly

Breathing System

Manual bag

AGSS assembly

Intermediate level disinfection

High level disinfection

A* B* C*

★★

★

★★

★

★★

★

Indicates that this disinfection method is applicable.

A* Clean with a damp cloth soaked in mild detergent and then wipe off the remaining detergent with a dry lint free cloth.

B* Flush with water ﬁ rst; then soak in water and cleaning solution (water temperature 40ºC recommended) for approximately three minutes and wipe with 70% ethanol.

C* Steam autoclave at maximum 134ºC.

Cleaning and Disinfection

Clean and Disinfect the Anesthesia Machine Housing

Clean the surface of the anesthesia machine housing with a damp cloth soaked in mild detergent (such as 70% ethanol).

After cleaning the housing, remove the remaining detergent by wiping with a dry lint free cloth.

WARNING

Seeping liquid into the control assembly can damage the equipment or cause

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personal injury. When cleaning the housing, make sure that no liquid ﬂ ows into the control assembly and always disconnect the equipment from the AC mains. Reconnect the AC mains after the cleaned parts are fully dry.

NOTE

Use only soft dry and lint free cloth to clean the display. Do not use any liquid

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for display cleaning.

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Disassemble the Breathing System Cleanable Parts

You need to disassemble the breathing system cleanable parts first before cleaning the system.

O2 Sensor

1.Remove one end of the O2 sensor cable from the connector on the anesthesia machine. Unplug the other end of the cable

from the O2 sensor.

Turn the O2 sensor counterclockwise to

take it out.

Cleaning and Disinfection

Breathing Tubes and Y Piece

Remove the filter from the Y piece. Disconnect the breathing tubes from the inspiration/expiration connectors on the breathing system.

WARNING

When installing the breathing tube, hold the tube connector at both ends of the

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tube to prevent damage of the tube. Do not reuse the ﬁ lter to prevent cross-contamination. Follow local regulations

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regarding disposal of hospital waste when the ﬁ lter is discarded. Install the ﬁ lter as described in this guide to prevent dust and particles from

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entering the patient’s lungs and prevent cross-contamination.

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Flow Sensor

1.Turn the locking nuts counterclockwise.

Pull out the inspiration/expiration connectors

and their locking nuts.

WARNING

Tighten the locking nuts when installing the ﬂ ow sensor. Failure to do so may

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result in invalid measurement. The end of inspiration/expiration connectors which connect the breathing tube

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shall be kept downward to prevent condensed water from entering the breathing system.

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Cleaning and Disinfection

3.Pull out the ﬂ ow sensors horizontally.

Check Valve Assembly

Turn the check valve

cover counterclockwise to remove it.

2.Pull out the check valve.

WARNING

Do not separate the check valve diaphragm from the valve cover.

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When installing the check valve, depress the valve forcibly to make sure that it

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is installed in position.

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Water Collection Cup

Hold the water

collection cup and turn it clockwise.

Remove the water collection cup.

Cleaning and Disinfection

Sodalime Canister

1.Hold and pull up the rotary handle for 90 degrees.

2.Turn the rotary handle for 90 degrees counterclockwise.

WARNING

Sodalime is a caustic substance and is a strong

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irritant to eyes, skin and respiratory system. Affected parts should be ﬂ ushed with water. If irritation continues after ﬂ ushed by water, seek medical assistance immediately. Before installing the sodalime canister, inspect

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the canister mouth, canister support and seal for sodalime particles. If there is, clear it to prevent breathing system leakage.

Clean the sodalime canister and change the

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sodalime canister sponge regularly. Otherwise, the sodalime powder built up inside the canister will go into the breathing system.

The sodalime canister sponge must be in place

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to prevent dust and particles from entering the breathing system.

Do not reuse the sodalime canister sponge,

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which must be replaced every time the sodalime canister is replaced.

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the slot.

Pull out the sodalime canister from

Canister seal

Canister support

Canister mouth

Cleaning and Disinfection

Airway Pressure Gauge

Pull off the airway pressure gauge as shown below

Manual Bag

Remove the manual bag from the manual bag port on the breathing system as shown below.

The anesthesia machine is conﬁ gured with bag arm:

The anesthesia machine is not conﬁ gured with bag arm:

Bag Arm

Loosen the locking nut counterclockwise.

2.Remove the bag arm from the breathing system.

Cleaning and Disinfection

Bellows Assembly

1.Turn the bellows housing counterclockwise.

2.Remove the housing.

3.Remove the folding bag from the bellows base.

Incorrect installation causes the folding

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as shown in the ﬁ gure, which leads to the breathing system leakage. Reinstall the bellows housing.

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NOTE

Before installing the bellows housing,

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check that the sealing component on the breathing system is in position. If not, you must install the sealing component properly before installing the bellows housing. When installing the bellows housing,

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align the bellows housing bayonet tabs with the slots on the breathing system and then lower the bellows housing. Make sure that the housing is depressing the seal evenly. Hold the bellows housing tightly and turn it clockwise until it stops. Make sure that the side of the housing marked with scale is facing the operator.

Cleaning and Disinfection

Breathing system

Remove the breathing system assembly

according to the aforementioned procedures.Hold the breathing system with one hand. Pull up the locking catches on the breathing system adapter with the other hand to unlock it.

3.Ensure that the breathing system assembly has been removed correctly. Disinfect the breathing system assembly.

2.Remove the breathing system from the breathing system adapter with both hands.

WARNING

Disassemble and reassemble the breathing system as described in this guide.

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For further disassembly and reassembly, contact us. Improper disassembling and reassembling may cause breathing system leak and compromise normal system use.

After the breathing system assembly is cleaned and disinfected, reinstall the

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assembly when it is fully dry.

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Maintenance

Do not use malfunctioning anesthesia machine. Have all repairs and service

done by an authorized service representative. Replacement and maintenance of tube parts listed in this manual may be undertaken by a competent, trained individual having experience in the repair of devices of this nature.

After repair, test the anesthesia machine to ensure that it is functioning

properly, in accordance with the speciﬁ cations.

WARNING

Only use lubricants approved for anesthesia or O2 equipment.

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Do not use lubricants that contain oil or grease. They burn or explode in high

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O2 concentrations.

Obey infection control and safety procedures. Used equipment may contain

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blood and body ﬂ uids.

Movable parts and removable components may present a pinch or a crush

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hazard. Use care when moving or replacing system parts and components.

NOTE

No repair should ever be attempted by anyone not having experience in the

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repair of devices of this nature.

Replace damaged parts with components manufactured or sold by us. Then

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test the unit to make sure that it complies with the manufacturer’s published speciﬁ cations.

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Maintenance

：

NOTE

These schedules are the minimum frequency based on typical usage of 2000

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hours per year. You should service the equipment more frequently if you use it more than the typical yearly usage.

Maintenance Schedule

Minimum

frequency

Daily

Biweekly Drain the vaporizers and discard the agent.

Monthly

During cleaning and setup

Annually

Every three years

As necessary

Maintenance

Clean the external surfaces. 21% O2 calibration (O2 sensor in breathing system).

100% O2 calibration (breathing system O2 sensor).

Clear water built up inside the waterstraps of CO2 module and AG module.

Inspect the parts and O-rings for damage. Replace or repair as necessary.

Replace the seal on the vaporizer manifold and that on the breathing system port. Contact us for details.

CO2 module calibration. AG module calibration.

Replace the built-in lithium-ion batteries. Contact us for details.

Before installing the cylinder, use a new cylinder gasket on cylinder yoke. Empty the water collection cup If there is water built up in it.

Replace the sodalime in the sodalime canister if sodalime color changes. Replace the breathing system O2 sensor if it is damaged (Under typical use the sensor meets speciﬁ cations for one year.). Replace the ﬂ ow sensor if it is damaged.

Calibrate the ﬂ ow sensor when any of the following occurs:

1) the ﬂ ow sensor is changed; 2) the tidal volume set is not consistent with that displayed when no leakage occurs;

3) there is a great difference between the tidal volume measured and that displayed by the bellows scale when fresh gas is very small.

Flow Sensor Calibration

：

NOTE

Do not perform calibration while the unit is connected to a patient.

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During calibration, do not operate the pneumatic parts. Do not move or press

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the breathing tubes especially. During calibration, the drive gas pressure must be kept above 0.3 MPa.

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Otherwise calibration failure may result.

To calibrate the ﬂ ow sensor, do as follows:

1.Before calibration, ensure that the supply gas pressure is normal.

2.Turn all ﬂ owmeter controls to 0. Turn off all

3.Make sure that the bag/mechanical ventilation switch is set to the position.

4.Remove the folding bag from the bellows and reinstall the bellows housing.

5.Plug the Y piece into the leak test plug to close the breathing system.

fresh gas inputs.

Make sure that the system is Standby. If not, press the

7. [Ok] from the pop-up menu to enter standby status.

8.Select the [Maintenance] shortcut key and then select [Flow Sensor Cal. >>] to open the [Flow Sensor Cal.] menu. Select [Start] from the menu to start to calibrate the ﬂ ow sensor. The screen prompts [Calibrating].

9.During calibration, if you select [Stop], calibration is stopped. Then the message [Calibration Stopped! Calibration is unﬁ nished.] is displayed. This indicates invalid calibration instead of calibration failure.

10.After a successful calibration, the screen shows [Calibration Completed!]. Otherwise, the message [Calibration Failure! Please try again.] is displayed. In this case, you need to do the calibration again.

key and then select

Flow Sensor Calibration

In case of ﬂ ow sensor calibration failure, refer to the following table for troubleshooting.

Failure description Possible cause Recommended action

1. Check the supply pressure and ensure that it is not lower than 0.2 MPa.

2. Check the bag/mechanical ventilation switch and ensure that it is set to the mechanical position.

3. In case that the supply pressure is normal but the alarm [Drive Gas Pressure Low] is still on, contact us.

4. Switch over the bag/ mechanical ventilation switch but the ventilation status displayed in the screen upper left corner keeps unchanged. In this case, contact us.

1. Check the ﬂ ow sensor and the related sealing components for improper installation.

2. Check the check valve assembly and the related sealing components for improper installation.

3. Replace the ﬂ ow sensor and calibrate again.

4. If the problem persists after taking all the mentioned measures, contact us.

1. Remove the problem that the tubes are pressed. Calibrate the ﬂ ow sensor again by following calibration procedures.

2. If the problem persists after multiple calibrations, contcact us.

After the calibration is started, the message of calibration failure is displayed before ventilation sound is heard.

After the calibration is started, the message of calibration failure is displayed shortly after ventilation sound is heard.

After the calibration is started, the ventilation sound is heard. After the calibration lasts about 3 minutes, the system prompts calibration failure.

1. The pipeline supply pressure is too low.

2. The bag/mechanical ventilation switch is not set to the mechanical position.

3. The supply pressure switch malfunctions.

4. The bag/mechanical ventilation switch malfunctions.

1. The ﬂ ow sensor in the breathing system is not installed properly.

2. The check valve assembly in the breathing system is not installed properly.

3. The ﬂ ow sensor malfunctions.

During calibration, the gas supply or the breathing tubes are interfered so that the calibration data are not correct.

Commonly-encountered Problems

Failure description Possible cause Recommended action

In case of this problem, judge the actual gas delivery volume to the patient by observing the graduation on the bellows housing. If it is abnormal, apply manual ventilation. After the operation, take the measures below to remove the problem.

1. Clear water or other liquids built up inside the ﬂ ow sensor in the breathing system.

2. Check if the ﬂ ow sensor is installed properly and if its sealing components are in good condition.

3. Recalibrate the ﬂ ow sensor.

4. Check the membrane inside the ﬂ ow sensor for distortion. If there is, replace the ﬂ ow sensor and calibrate again.

5. Check if the expiratory/ inspiratory check valve and its seal are installed properly. If necessary, use a new one and reinstall it.

6. If the problem persists after taking all the mentioned measures, apply manual ventilation and contact us promptly.

The

alarm

[Check Flow Sensors] is displayed.

1. The expiratory/ inspiratory check valve and its seal are not installed properly.

2. The ﬂ ow sensor is installed improperly or damaged.

3. Other part of the anesthesia machine malfunctions.

The alarm [Volume Monitoring Disabled] occurs.

1.ACGO is switched on.

2. The ﬂ ow sensor malfunctions.

1. Switch off ACGO.

2. If the sensor malfunction related alarm is detected, apply manual ventilation and contact us promptly.

Commonly-encountered Problems

Failure description

The alarm [Paw Too High] or [Pressure Limiting] occurs.

The alarm [Paw Too Low] occurs.

Possible cause Recommended action

1 Check if the breathing tubes 1 The breathing tubes are occluded.

2 Patient airway is occluded. 3 Paw high alarm setting is

too low or Plimit setting is too low.

4 Ventilation parameters are changed.

5 The value measured by the airway pressure sensor is a bit high.

Any of the above reasons may cause Paw to be higher than Paw high alarm limi the alarm [Paw Too High] is triggered, or cause Paw to exceed the Plimit setting so that the alarm [Pressure Limiting] is triggered.

1 The breathing tubes leak. 2 Paw low alarm limit is set too high. 3 The breathing system is not installed properly. 4 The value measured by the pressure sensor is a bit low. Any of the above reasons may cause the Paw to be lower than the Paw low alarm limit for consecutive 20 seconds.

t so that

are pressed or bent. Check if the

ﬁ lter connected to the Y-piece is

ﬁ lled with patient secretions and

replace it if necessary.

2 Check if the patient tracheal

intubation is in good condition.

If necessary, clear excessive

patient secretions in the airway.

3 Increase Paw high alarm setting

or Plimit setting.

4 Re-set the ventilation

parameters.

5 Compare the Ppeak displayed

on the screen with the reading

on the airway pressure gauge. If

the Ppeak is signiﬁ cantly different

from the maximum reading on

the airway pressure gauge, apply

manual ventilation and contact us

promptly.

1 Check for tube leakage,

especially when the disposable

breathing tubes are used. Replace

them promptly in case of leakage.

2 Set Paw low alarm limit to a

lower value.

3 Check if the breathing system

is installed properly. If necessary,

reinstall it.

4 Compare the Ppeak displayed

on the screen with the reading

on the airway pressure gauge. If

the Ppeak is signiﬁ cantly different

from the maximum reading on

the airway pressure gauge, apply

manual ventilation and contact us

promptly.

Commonly-encountered Problems

Failure description

The alarm [Sustained Airway Pressure] occurs.

The alarm [Pinsp Not Achieved] occurs.

Possible cause Recommended action

1. TV is set too high. Rate or I:E setting is too high, which disables complete expiration and results in sustained airway pressure.

2. The airway resistance inside the patient expiratory pipeline in the breathing system is too high.

3. The airway resistance inside the AGSS is so high that the expiratory pressure cannot be released timely.

1 Decrease TV or the respective

settings for Rate and I:E to

lengthen expiratory duration.

2. Check if the expiratory pipeline

is pressed or distorted. Check if

the ﬁ lter connected to the Y-piece

is ﬁ lled with patient secretions and

replace it if necessary.

3. Check if the AGSS is blocked.

4. If the problem persists

after taking all the mentioned

measures, apply manual

ventilation and contact us

promptly.

1. Adjust pressure control

parameters.

2. If the acutal gas delivery volume

1. In the PCV mode, Pinsp is set too high or RR is too high.

2. Patient complicance is too high.

3. The folding bag collapses or does not reach the top of the bellows housing.

4. The breathing system or patient tracheal intubation leaks.

detected is too high, switch to VCV.

3. Push the O2 ﬂ ush button to ﬁ ll

the folding bag. Increase the fresh

gas ﬂ ow appropriately to ensure

the folding bag reaches the top of

the bellows housing each time.

4. Check the breathing system

and patient tracheal intubation for

leakage.

If the problem persists after taking all the mentioned measures, apply manual ventilation and contact us promptly.

Commonly-encountered Problems

Failure description

The alarm [Paw < -10cmH2O] occurs

The alarm [TV Not Achieved] occurs.

Possible cause Recommended action

1.Check if the patient is in good condition. According to patient physiological status, increase

1 Patient spontaneous breathing is so strong that Paw is less than -10 cmH2O. 2 The value measured by the pressure sensor is not correct.

1 TV is set too high, RR too high or PEEP too high.

2. Paw is higher than Plimit so that gas delilvery stops in advance.

3. The folding bag collapses or does not reach the top of the bellows housing.

4. The breathing system or patient tracheal intubation leaks.

TV delivery or fresh gas ﬂ ow, or check if patient tracheal intubation is in good condition.

2. Compare the value measured by the pressure sensor with the reading on the airway pressure gauge. If the difference is signiﬁ cant, apply manual ventilation and contact us promptly.

1. Adjust the breathing parameter settings.

2. Change the Plimit setting and check if the breathing tubes are blocked.

Push the O2 ﬂ ush button to ﬁ ll the

3. folding bag. Increase the fresh gas ﬂ ow appropriately to ensure the folding bag reaches the top of the bellows housing each time.

Check the breathing system and patient tracheal intubation for leakage.

5.If the problem persists after taking all the mentioned measures, apply manual ventilation and contact us promptly.

Commonly-encountered Problems

Failure description

The alarm [TV Comp Disabled] occurs.

Possible cause Recommended action

1. Switch on TV compensation.

2. Decrease the fresh gas ﬂ ow appropriately.

Check the breathing system and patient tracheal intubation for leakage.

1. TV compensation is switched off.

2. The ﬂ ow of fresh air is too high.

3. There is signiﬁ cant leakage in the breathing system.

4. The measured value by the ﬂ ow sensor in the breathing system is inaccurate.

4. During ventilation, observe the graduation on the bellows housing and the fresh gas volume. If necessary, change the parameter setting to ensure that the gas delivery volume meets the patient requirements or apply manual ventilation. After the operation, check the sensor measurement and perform calibration at the user-end. If necessary, replace the ﬂ ow sensor and calibrate again.

5.If the problem persists after taking all the mentioned measures, apply manual ventilation and contact us promptly.

The alarm [Pressure Monitoring Channel Failure] occurs.

1. The measured value by the pressure sensor exceeds the range.

2. The pressure sensor malfunctions.

1. Observe if the anesthesia machine operates normally. If yes, switch it to VCV. If not, apply manual ventilation and restart the machine.

2. If the measured value is signiﬁ cantly different from the reading on the airway pressure gauge, contact us promptly.

Commonly-encountered Problems

Failure description

The alarm [Apnea Alarm] occurs

The alarm [TVe>TVi] occurs.

Possible cause Recommended action

1 The ventilator fails to detect changes of ﬂ ow and presssure. 2 If the backup ventilation time in PSV mode is set to be longer than 20 s, this alarm occurs when the backup ventilation mode is started.

1. The value measured by the expiratory ﬂ ow sensor is a bit high or that meausred by the inspiratory ﬂ ow sensor is a bit low.

2. The expiratory valve assembly is not installed properly.

1. Check if the breathing system is installed properly or leaks signiﬁ cantly. Check if the ﬂ ow sensor is in good condition or installed properly. In case that parts are damaged or failures cannot be removed, apply manual ventilation and contact us promptly.

2. Set the backup ventilation time to be shorter than 20 s in PSV mode if necessary.

1. Clear water or other liquids built up inside the ﬂ ow sensor in the breathing system.

2. Check if the ﬂ ow sensor is installed properly and if its sealing components are in good condition.

3. Re-calibrate the ﬂ ow sensor.

4. Check the membrane inside the ﬂ ow sensor for distortion. If there is, replace the ﬂ ow sensor and calibrate again.

5. Check if the expiratory/inspiratory check valve and its seal are installed properly. If necessary, use a new one and reinstall it.

6. If the problem persists after taking all the mentioned measures, apply manual ventilation and contact us promptly.

Commonly-encountered Problems

Failure description

The alarm [O2 sensor Unconnected] occurs.

The alarm[Low Battery Voltage!] occurs.

Possible cause Recommended action

1. Connect the O2 sensor. If it is not conﬁ gured, select [User Maintenance >>] → [Set O2 Sensor Monitoring >>]. Then

1. The O2 sensor is not connected.

2. The O2 sensor cable is not connected properly.

The battery voltage is too low.

select [OFF] from the pop-up menu.

2. Check if the O2 sensor cable is connected properly. If not, reconnect the O2 sensor and its cable.

3. If the problem persists after taking all the mentioned measures, contact us promptly.

1. Reconnect the AC mains. In case of power failure, use manual ventilation mode.

2. Reconnect the AC mains and charge the battery. After 30 minutes, disconnect the AC mains. If this alarm is still on, the battery has been damaged. promptly.

The alarm[XX Comm Error] or [XX Comm Stop] ocurs (XX represents Power System, Auxi Ctrl Module, Flowmeter, CO2, AG or BIS).

The alarm [Heating module Failure] occurs.

1. Software occasional error.

2. Ventilator hardware error.

1. The heating voltage of the heathing module malfunctions.

2. The temperature test malfunctions.

1. Apply manual ventilation and restart the machine.

2. If the problem persists after taking all the mentioned measures, contact us promptly.

Commonly-encountered Problems

Failure description

The breathing system leaks, or the leak test of the breathing system is not passed.

Possible cause Recommended action

1. Loose connections between the breathing tubes and the connectors occur. Patient tracheal intubation leaks.

2. The POP valve and its seal inside the bellows assembly are installed improperly or damaged. The folding bag is improperly installed, aged or distorted. The bellows housing is improperly installed.

3. The expiratory/ inspiratory check valve assembly is not installed properly.

4. The sodalime canister assembly and its sealing components are not installed properly. Soda powder falls into the breathing system.

5. The breathing system is not installed properly.

6. APL valve pressure is insufﬁ ent or APL valve malfunctions (in manual ventilation mode).

1. Check for loose connections between the breathing tubes and the connectors. If the disposable tubes are used, replace them timely. During an operation, check patient tracheal intubation for leakage.

2. Check the POP valve, folding bag, the bellows housing and the sealing components for improper installation. If necessary, use a new seal and install it. If the folding bag aging or distortion is detected, apply manual ventilation and contact us promptly.

3. Check the expiratory/inspiratory check valve cover and its seal for improper installation. If necessary, use a new seal and install it.

4. Check the sodalime canister and its seal for improper installation. If necessary, use a new seal and install it. If soda powder falls into the breathing system, remove it. Follow the procedures speciﬁ ed in the Operator's Manual to change the sodalime. 5 Check if the breathing system is installed properly. If necessary, reinstall it.

6. Increase the APL valve pressure.

7.If the problem persists after taking all the mentioned measures, apply manual ventilation and contact us promptly.

Commonly-encountered Problems

Failure description

In mechanical ventilation mode, the folding bag of the bellows is basically disabled. The machine seemingly stops operation.

The alarm [O2N2O Ratio Error] occurs.

Possible cause Recommended action

1. Switch on the ACGO.

2. TV or pressure level is set too low, which causes low gas delivery ﬂ ow. TV setting is not high but the fresh gas is set too high, which causes fresh gas volume to reach the TV setting and the folding bag to remain unmoved.

3. The sensor or the valve malﬂ unctions, or other software/hardware system malfunctions.

The O2-N2O cut-off valve or the O2-N2O chain linkage malfunctions.

1. Switch off the ACGO.

2. Decrease the fresh gas and increase the TV appropriately to increase Rate.

3. Apply manual ventilation and restart the machine.

4. If the problem persists after taking all the mentioned measures, contact us promptly.

Refer to other O2 concentration monitoring when adjusting O2 ﬂ ow and N2O ﬂ ow. Ensure that the O2-N2O ratio meets the actual patient requirement. Contact us promptly.

www.mindray.com

Shenzhen Mindray Bio-Medical Electronics Co., Ltd.

Mindray Building, Keji 12th Road South, Hi-tech Industrial Park, Nanshan, Shenzhen 518057 P.R. China

Tel: +86 755 26582888 Fax: +86 755 26582680

Mindray VS-800 User manual

Specifications and Main Features

Frequently Asked Questions

User Manual