C500 , VN500 and GS500 Technical Documentation IPM Rev 2.0

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Table of contents

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Table of contents General General notes... Abbreviations List of abbreviations... Function descriptions General points about the workstation... Function descriptions pneumatic assembly Pneumatic assembly... Gas metering module M1.3... Basics of flow measurement... Explanation of the terms NTPD, BTPS and NTPS... Inspiratory unit/safety valve unit... Neonatal expiratory valve... Calibration unit... PATO O2 sensor M12.4... Nebulizer/ejector option... Blower adapter... Function descriptions electronics Electronic assembly... Battery NiMH M7... Power supply unit M7.3... Fan unit fan... Power PCB... Therapy Control Unit PCB M16... SysCon PCB... Main PCB... „Connector” PCB... OLED-Contact PCB... OLED Controller PCB... PVT Monitoring PCB M4.1... RFID PCB M21... Valve drive M15.1... Lift magnet M15.2... MCable-Mainstream CO2 sensor M11.1... Heating fan... Nurse call... Neo Flow PCB... Function description Infinity C500 Infinity C500 function description... Function description GS500 Gas supply unit GS500... Annex

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Table of contents

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General

This chapter contains general notes and definitions that are important for the use of this documentation. 6

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General notes ...

General General notes

General notes

Notes on use

Read through the following notes thoroughly before applying this documentation. Dräger reserves the right to make changes to the device and/or to this documentation without prior notice. This documentation is intended solely as an information resource for experts, and will be updated only at their request.

Copyright and other protected rights

The content of this documentation, in particular its design, text, software, technical drawings, configurations, graphics, images, data and their selection and its composition and any amendments to it ("content") are protected by copyright. The content must not (in whole or in part) be modified, copied, distributed, reproduced, republished, displayed, transmitted or sold without the prior written consent of Dräger.

Definitions WARNING! An important advisory indicating a potentially hazardous situation which may result in death or serious injury if not prevented. CAUTION An important advisory indicating a potentially hazardous situation which may result in minor or moderate injury to the user or to patients or in damage to the device or to other assets if not prevented. NOTE An additional advisory intended to avoid problems in using or servicing the device. =

Identification of actual condition

Maintenance

=

Measures to maintain the specified condition

Repair

=

Measures to restore specified condition

Servicing

=

Inspection, maintenance, repair

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Inspection

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General General notes

Notes

Read through each section thoroughly before beginning servicing. Always use the correct tools and the specified test equipment. Otherwise the device may not work correctly or may be damaged. WARNING! – Dräger recommends using original Dräger parts for servicing. Otherwise the device's correct functioning could be compromised. –

Pay attention to the „Servicing“ section of the Instructions for Use.

CAUTION Improper servicing. Device not working or working incorrectly. –

Servicing may only be carried out by experts.

NOTE Where reference is made to legislation, regulations and standards, in respect of devices used and serviced in Germany they are based on the laws of Germany. Users and technicians in other countries must comply with their national laws and/or international standards. CAUTION Non-conforming test values. Device not working or working incorrectly. –

Do not put the device into operation.

–

Contact your local service organization.

CAUTION

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Before carrying out any servicing, check that the device and its components have been handed over by the user cleaned and disinfected.

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General General notes

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Abbreviations

This section contains a list of the abbreviations used in this document. 10

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List of abbreviations ...

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Abbreviations List of abbreviations

List of abbreviations

Abbreviations

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Explanation

ADC

Analog/Digital Converter

APRV

Airway Pressure Release Ventilation

ATC

Automatic Tube Compensation

autoPPS

automatic Proportional Pressure Support

bpm

breaths per minute

BSP

Board Support Package

BTPS

Body Temperatur Pressure Saturated, measurements referred to conditions of the patient's lung, body temperature 37 °C, ambient pressure, water vapor saturated gas

C

Compliance

CDPOC

Cross Domain Point of Care Application

' Psupp

Pressure support Psupp setting relative to PEEP

DAC

Digital/Analog Converter

dynamic PEEPi

Positive end-expiratory pressure

EAST

Electronic Accessory Signature Technology

EEPROM

Electrically Erasable Programmable Read Only Memory

EMC

Electro Magnetic Compatibility

f

Respiratory rate

fEIT

functional Electrical Impedance Tomography

FiO2

Inspiratory O2 concentration

FPGA

Field Programmable Gate Array

FRC

Free Residual Capacity

Heliox

Gas mixture, mostly 79% helium, 21% oxygen

I: E

Inspiratory-to-expiratory time ratio

ILV

Independent Lung Ventilation

LVDS

Low Voltage Differential Signaling

MEDIBUS

Dräger communications protocol for medical devices

MMV

Mandatory Minute Volume Ventilation

MV

Minute Volume = product of the VT and f settings (VT x f)

MVi

Inspiratory minute volume

NIF

Measurement of Negative Inspiration Force

NIV

Non-Invasive Ventilation (mask ventilation)

NTPD

Normal Temperature Pressure Dry

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Abbreviation

Abbreviations List of abbreviations

Abbreviation

Explanation Operational amplifier

Pa

Pascal, unit of pressure; 1 mbar = 100 Pa = 1 hPa; 1 bar = 100 kPa = 1000 hPa

PAN

Patient Area Network

Paw

Airway pressure

PI

Product Integration

Pinsp

Setting of the upper pressure level in Pressure Control mode

PIP

Measured inspiratory peak pressure

Pmax

Setting of the maximum permitted airway pressure

Pmean

Mean airway pressure

PPS

Proportional Pressure Support

R

Resistance

RFID

Radio Frequency Identification

SC

System Cable

SPI

Serial Peripheral Interface

VG

Volume Guarantee

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OP

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Abbreviations List of abbreviations

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Function descriptions

This chapter contains descriptions of the device's technical functions. 14

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General points about the workstation ...

Function descriptions General points about the workstation

General points about the workstation

Introduction

The following provides a brief introduction to the workstation. The detailed functionality of the electronic and pneumatic components is set out in the function description Electronic assembly and Pneumatic assembly.

Design

Front view of workstation Item

14

Designation

1

Display unit

2

Ventilation unit

3

Trolley option

4

Gas supply unit option

5

Power supply unit option

6

Nebulizer option

7

Humidifier option

8

Other devices and accessories from Dräger or third parties (see accessories list)

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Fig. 1

Function descriptions General points about the workstation

The modular workstations permit implementation of standardized treatment processes and procedures in all areas of care. All functional units of a workstation can be deployed in different care environments. The workstations are configured according to customer requirements. They comprise monitoring and control displays as well as additional units, devices or accessories.

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Functional principle

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Function descriptions General points about the workstation

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Function descriptions pneumatic assembly

This chapter contains descriptions of the pneumatic components and of the device's technical functions.

Pneumatic assembly ... Gas metering module M1.3... Basics of flow measurement ... Explanation of the terms NTPD, BTPS and NTPS ... Inspiratory unit/safety valve unit... Neonatal expiratory valve ... Calibration unit ... PATO O2 sensor M12.4... Nebulizer/ejector option ... Blower adapter...

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Function descriptions pneumatic assembly Pneumatic assembly

Pneumatic assembly

Introduction

The pneumatic components are actuated by the electronics and regulate the ventilation pressure and ventilation flow to the patient. The following details the design and function of the pneumatic assembly.

Design

The pneumatic assembly consists of the following main components:

Main pneumatic components

Item

18

Designation

Design

A

Gas metering module M1.3

For a detailed description see Gas metering module M1.3

B

Inspiratory unit/safety valve unit module

For a detailed description see Inspiratory unit/safety valve unit

C

Neonatal expiratory valve module

For a detailed description see Neonatal expiratory valve

D

Silencer

The sound absorber is an integral part of the neonatal expiratory valve module

E

Barometric pressure sensor

The barometric pressure sensor is located on the PI Main PCB. For a detailed description see Main PCB

F

Pressure measurement module, PVT Monitoring PCB M4.1

For a detailed description see PVT Monitoring PCB M4.1

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Fig. 2

Function descriptions pneumatic assembly Pneumatic assembly

Item

Designation

Design

G

Calibration unit module

For a detailed description see Calibration unit

H

PATO-O2 sensor module M12.4

The PATO O2 sensor M12.4 is pneumatically connected via an attenuator (1) to the calibration unit (G). For a detailed description see PATO O2 sensor M12.4

I

Nebulizer/ejector option

For a detailed description see Nebulizer/ejector option

J

Attenuator

The attenuator provides a laminar flow of the mixed gas to the PATO O2 sensor M12.4.

K

Blower adapter

This blower adapter is only installed if the gas supply unit option is fitted. For a detailed description see Blower adapter

Functional principle

Fig. 3

Functional principle of the pneumatics

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Item

Designation

Item

Designation

1

Gas inlet - Air

15

Neonatal flow sensor (S4)

2

Gas inlet - O2

16

Barometric pressure sensor (S8)

3

Air non-return valve (M1_3_CV1)

17

Calibration valve (V8) for inspiratory pressure sensor (S9)

4

O2 non-return valve (M1_3_CV2)

18

Inspiratory pressure sensor (S9)

5

Air metering valve (M1_3_V1)

19

Calibration valve (V6) for expiratory pressure sensor (S6)

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Function descriptions pneumatic assembly Pneumatic assembly

Item

Designation

Item

Designation

6

O2 metering valve (M1_3_V2)

20

Expiratory pressure sensor (S6)

7

Gas mixing tank

21

PATO O2 sensor (S1)

8

Mixed gas metering valve (M1_3_V3)

22

Nebulizer outlet

9

Safety valve (V5)

23

Air pressure regulator (PR1)

10

Emergency expiratory valve (SV2)

24

O2 pressure regulator (PR2)

11

Emergency respiratory valve (SV3)

25

Nebulizer mixing valve (V10)

12

Patient's lung

26

Nebulizer switching valve (V9)

13

Expiratory valve (V16)

27

Ejector switching valve

14

Non-return valve (CV5)

28

Ejector

29

Silencer

30

CO2 sensor (optional) (S5)

The gas metering module M1.3 (A) delivers the timed variable flow of a gas mixture with adjustable O2 and air content. Gas from the (central) supply system enters the device via the gas inlet ports for O2 and air (1, 2). Two nonreturn valves (3, 4) prevent each gas from flowing back into the supply line of the other. The gases are mixed in the tank (7), and the mixing process is controlled by way of two regulated valves (5, 6). The delivered inspiratory flow is controlled by way of a third regulated valve (8). The inspiratory unit/safety valve unit module (B) comprises the safety valve (9) and two non-return valves (10, 11). In normal operation the safety valve is closed, so that the inspiratory flow passes from the gas mixing and metering module to the patient (12). In the other operating states, such as when the Babylog VN500 is in Standby mode, the safety valve is open and permits spontaneous inspiration through the emergency respiratory valve (11). The emergency expiratory valve (10) provides a second channel for spontaneous expiration if the expiratory branch is blocked. The Neonatal expiratory valve module (C) consists of the expiratory valve (13) and a non-return valve (14). The expiratory valve is a proportional valve, and its purpose is to adjust the pressure in the respiratory system. The nonreturn valve (14), in conjunction with the emergency air outlet valve (10), prevents rebreathing during spontaneous breathing. The neonatal flow sensor (D, 15) measures the inspiratory and expiratory flow based on the hot-wire anemometry measuring principle. Therefore the measured flow is a mass flow (NTPD).

The ejector (28) of the drug nebulizer / ejector drive assembly (I) generates the negative pressure required for the HFO mode. The ejector valve (27) supplies the required driving gas. In order to reduce disturbing noise, the flow downstream of the expiratory valve (13) is vented to atmosphere via the sound absorber (D, 29).

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Conversion of the mass flow into a volumetric flow (BTPS) requires knowledge of the ambient pressure. The ambient pressure is measured with the barometric pressure sensor (E, 16).