Air Shields
Babylog and Neonatal Ventilator Series
C500 , VN500 and GS500 Technical Documentation IPM Rev 2.0
Technical Documentation
244 Pages
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Technical Documentation IPM Workstation Neonatal Care C500, VN500, GS500, Trolley
Warning All servicing and/or test procedures on the device require detailed knowledge of this documentation. Use of the device requires detailed knowledge and observance of the relevant Instructions for Use.
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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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Workstation Neonatal Care
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
10
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).