Datex-Ohmeda MRI Technical reference manual

MRI Monitor

Technical Reference Manual

CAUTION: U.S. Federal law restricts this device to sale by or on the order of a licensed medical practitioner.

Datex-Ohmeda Inc.

P.O. Box 7550

Madison, WI 53707-7550, USA

Tel: [phone]

Fax: [phone]

All specifications are subject to change without notice.

Outside the USA, check local laws for any restriction that may apply.

Order Code M1079546

September, 2006

GE Healthcare Finland Oy

FI-00031 GE, FINLAND

Tel: [phone]

Fax: [phone]

www.gehealthcare.com

© 2005, 2006 Copyright General Electric Company

nd

2

edition

Helsinki, Finland

P.O. Box 900

Intended purpose (Indications for use)

The MRI Monitor with L-CANE05 or L-CANE05A software, module options E-MRIPSN, E-MRICAiOV, E-MRICAiO,
E-MRICO and accessories is indicated for monitoring of hemodynamic (comprising ECG (including heart rate,
ST-segment and arrhythmia), NIBP, SpO

agents, anesthetic agent identification, and respiration rate) and ventilatory (comprising airway pressure,
volume and flow) status of hospital patients during magnetic resonance scanning.
The NIBP measurement is indicated for patients who weigh 5kg (11 lb) and up. The MRI Monitor with L-CANE05
or L-CANE05A software is also indicated for documenting patient care related information.
The MRI Monitor with L-CANE05 or L-CANE05A software, module options E-MRIPSN, E-MRICAiOV, E-MRICAiO,
E-MRICO and accessories is indicated for use in the MR environment up to 300 Gauss with static magnets up to

3.0 Tesla. SpO
environment.

The MRI Monitor with L-CANE05 or L-CANE05A software is indicated for use by qualified medical personnel
only.

and ECG monitoring is indicated only with accessories specifically designed for the MR

2

, and invasive blood pressure), respiratory (CO2, O2, N2O, anesthetic

2

Classifications

In accordance with IEC 60601-1

Class I and internally powered equipment – the type of protection against electric shock.
Type BF or CF equipment. The degree of protection against electric shock is indicated by a symbol on each
parameter module.
Equipment not suitable for use in the presence of a flammable anesthetic mixture with air or with oxygen or
nitrous oxide.
Continuous operation according to the mode of operation.

In accordance with IEC 60529

IPX1 - degree of protection against harmful ingress of water.

In accordance with EU Medical Device Directive

The MRI Monitor is classified as IIb.

In accordance with CISPR 11:

Group 1, Class B

• Group 1 contains all ISM (Industrial, scientific and medical) equipment in which there is intentionally

generated and/or used conductively coupled radio-frequency energy which is necessary for the internal
functioning of the equipment itself.

• Class B equipment is suitable for use in domestic establishments and in establishments directly connected

to a low voltage power supply network which supplies buildings used for domestic purposes.

Responsibility of the manufacturer

GE Healthcare Finland Oy (GE) is responsible for the effects on safety, reliability and performance of the
equipment only if:

• assembly, extensions, readjustments, modifications, servicing and repairs are carried out by personnel

authorized by GE.

• the electrical installation of the monitor room complies with appropriate requirements.

• the equipment is used in accordance with the "User's Guide."

• manufacturer approved MRI Monitor system components are used.

Trademarks

Datex, Ohmeda, S/5, D-lite, D-lite+, Pedi-lite, Pedi-lite+, D-fend, D-fend+, Mini D-fend, OxyTip+, MemCard,
ComWheel, ComBar, EarSat, FingerSat, FlexSat, PatientO

trademarks of GE Healthcare Finland Oy. All other product and company names are property of their respective
owners.

, Patient Spirometry, Entropy and Tonometrics are

2

Technical Reference Manual, Order code: M1079546

Document No. Updated Description

Master table of contents

MRI Monitor

nd

edition

2

Part I, General Service Guide

M1041746-2 Introduction, System description, Installation,

Interfacing, Functional check, General troubleshooting

M1041747-1 Planned Maintenance Instructions 2

Part II, Product Service Guide

Document No. Updated Description

M1056423 MRI Service Menu 1

M1084164-1 MRI Shield N-MRI2 Rev. 01, incl. ECG measurement

unit, Network option for MRI Monitor, N-MRINET,

Active Remote Screen Option, N-MRIREMOTE

Command Bar for MRI2, K-MRIANEB,

LCD Display, D-LCC19-01,

Remote screen and sound converter

M1056422-2 MRI Monitor Frame F-MRICM1, Display Unit

Software Licenses, L-CANE05, L-CANE05A

MRI Monitor Frame F-MRICM1, Frame Unit,

AC/DC Power Supply Unit

Options N-CMMEM, N-CMW and N-MRIREC1

1

2

3

M1041750-1 Hemodynamic MRI Module, E-MRIPSN 4

M1041752-2 Airway Gas Module, E-MRICAiOV 5

M1027838-5 S/5 Remote Controller, K-CREMCO 6

M1072254-1 Recordkeeping keyboard, K-ARKB 7

M1056425-1 S/5 Device Interfacing Solution, N-DISVENT 8

M1041753-2 Spare parts 9

Table of contents

Table of contents

Table of contents i

Table of figures iii

List of tables iv

About this manual 1

1Introduction 3

1.1 System introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.1.1 MRI Monitor system components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

1.1.2 Monitoring in MR room . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.1.3 Monitoring in control room . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

1.1.4 MR monitoring in network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.1.5 Monitoring in wireless network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

1.2 MRI Monitor introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

1.2.1 MRI Monitor parts and connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

1.2.2 MRI Monitor frame options and modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1.2.3 Connector panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

1.2.4 MRI Cart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

1.3 Symbols. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

1.3.1 Symbols on transport packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

1.3.2 Symbols on equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

1.3.3 Equipment safety symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

1.3.4 Other symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

1.4 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

1.4.1 Safety precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

1.4.2 ESD precautionary procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

1.4.3 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

2 System description 20

2.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

2.2 Bus structure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

2.3 Distributed processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

2.4 Module communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

2.5 Software loading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

2.6 Parameter modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

2.7 High magnetic field alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

3 System installation 24

3.1 Unpacking instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

3.2 Choosing location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

3.3 Installing and mounting the monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

3.3.1 MRI Monitor parts and connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

3.3.2 Monitor distance from the magnet bore. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

3.3.3 Connecting to mains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

3.3.4 Mounting the MRI Monitor to MRI Cart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

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3.3.5 Connecting to Datex-Ohmeda Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

3.3.6 Connecting to Wireless LAN network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

3.3.7 Device Interfacing Solution, N-DISVENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

3.3.8 Remote Screen installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

3.3.9 Parameter modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

3.3.10 Downloading Monitor Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

3.3.11 Performing Factory Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

3.3.12 Performing Service Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

3.4 S/5 Remote Controller, K-REMCO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

3.5 Anesthesia Record Keeping Keyboard, K-ARKB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

3.5.1 Connection to MRI Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

3.6 MRI Airway Module gas scavenging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

3.6.1 Sample gas exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

3.7 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

4 Interfacing 43

4.1 Interfaced parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

4.2 Interfacing external bedside devices via Device Interfacing Solutions, N-DISxxx . . . . . . . . . . . . . . . . .43

4.2.1 Device Interfacing Solution components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

4.2.2 Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

4.2.3 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

4.2.4 Selecting the external device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

4.2.5 Functional check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

4.2.6 Selecting the parameter data source. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

4.3 Interfacing printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

4.4 Interfacing computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

4.5 Output signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

5 Functional check 48

5.1 Recommended tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

5.2 Visual inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

5.3 Functional inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

6 General troubleshooting 55

Appendix A: Functional check form, MRI Monitor A-1

Appendix B: 1ElectroMagnetic Compatibility B-1

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Table of figures

Table of figures

Figure 1 MRI monitoring system components in MR room ...................................................................................4

Figure 2 MRI monitoring system components when using Active Remote Screen..................................................5

Figure 3 MR monitoring in network ..................................................................................................................... 6

Figure 4 MRI monitoring in wireless network .......................................................................................................7

Figure 5 MRI Monitor parts and connections.......................................................................................................8

Figure 6 MRI Cart.............................................................................................................................................10

Figure 7 General bus structure of MRI Monitor ..................................................................................................20

Figure 8 Principle of UPI section operation........................................................................................................21

Figure 9 General structure of parameter modules with patient isolation ............................................................. 22

Figure 10 Example of 300 Gauss line distance with a MR scanner. ......................................................................25

Figure 11 MRI Monitor parts and connections.....................................................................................................27

Figure 12 Field strength in MR room ...................................................................................................................28

Figure 13 MRI Cart............................................................................................................................................. 29

Figure 14 ‘Do not place any non-MR compatible items’ symbol ...........................................................................30

Figure 15 MRI Monitor connected to network......................................................................................................31

Figure 16 WLAN Acces Point in Control room ......................................................................................................33

Figure 17 MRI Monitor connected to wireless network .........................................................................................34

Figure 18 Control room installation ....................................................................................................................35

Figure 19 Exhaust to reservoir tube.....................................................................................................................41

Figure 20 Connection cables and LED indicators ................................................................................................44

Figure 21 An example of interfacing external devices with Device Interfacing Solution ..........................................45

Figure 22 MRI general troubleshooting flowchart ................................................................................................56

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MRI Monitor

List of tables

Table 1 Guidance and manufacturer’s declaration – electromagnetic emissions ................................... 1

Table 2 Guidance and manufacturer’s declaration – electromagnetic immunity .................................... 2

Table 3 Guidance and manufacturer’s declaration – electromagnetic immunity .................................... 3

Table 4 Recommended separation distances between portable and mobile RF communications equip-

ment and the MRI Monitor......................................................................................................................... 5

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Document no. M1041746 -1

About this manual

Intended audience

This Technical reference manual is meant for service representatives and technical personnel who
install, configure, maintain, administer, troubleshoot or repair MRI Monitor running the software
license L-CANE05 or L-CANE05A.

Notes to the reader

As the monitor setup may vary, some functions described may not be available in the monitor you are
using.

• The order code for the manual is M1079546. This is the second edition.

• Part I gives the reader an overview of the MRI Monitor. It contains the information needed to

install, interface and troubleshoot the monitors. Instructions for functional check and planned
maintenance are also included. Read the manual through and make sure that you understand
the procedures described before the installation of the monitor. To avoid risks concerning safety
or health, strictly observe the warning indications. If you need any assistance concerning the
installation, please do not hesitate to contact your authorized distributor.

• Part II contains detailed descriptions of each component of the MRI Monitor system, such as

MRI Monitor frame, shield, parameter modules and Active Remote Screen. Service check for
each product, service menus and all the spare parts information for MRI Monitor is included.

The manufacturer reserves the right to change product specifications without prior notice. Although
the information in this manual is believed to be accurate and reliable, the manufacturer assumes no
responsibility for its use.

Installation and service are allowed by authorized service personnel only.

GE Healthcare Finland Oy (GE) assumes no responsibility for the use or reliability of its software in
equipment that is not furnished by GE.

Related documentation

For instructions for daily use including cleaning and daily maintenance, clinical aspects and basic
methods of measurement see:
MRI Monitor, User’s Guide
MRI Monitor, User’s Reference Manual

For more information about the iCentral and anesthesia record keeping solution, see the “Technical
Reference Manuals” and “User’s Reference Manuals” for these products.

Software options and default settings are described in the “Default Configuration Worksheet”
delivered with each monitor.

Available accessories are described in the User’s Guide in “MRI accessories” section.

Conventions used

To help you find and interpret information easily, the manual uses consistent text formats:

Sign the check form after performing the procedure.

"

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MRI Monitor

Hard Keys Names of the hard keys on the Remote Controller, Command Board, Active Remote Screen

Command Bar and side panel are written in the following way:

Menu Items Software terms that identify window parts or menu items are written in bold italic: ECG Setup.

Menu access is described from top to bottom. For example, the selection of the
key, the Screen 1 Setup menu item and the Waveform Fields menu item would be shown as

Others.

Monitor Setup hard

Monitor Setup - Screen 1 Setup - Waveform Fields.

‘Messages’ Messages (alarm messages, informative messages) displayed on the screen are written inside single

quotes: ‘Please wait’.

“Sections” When referring to different sections in this manual or to other manuals, manual names and section

names are enclosed in double quotes:
See section "Cleaning and care."
Please refer to "iCentral User's Reference Manual: Alarms."

Hypertext links Hypertext links on PDF versions are written in blue color.

WARNING Warnings are written in the following way:

WARNING This is a WARNING.

CAUTION Cautions are written in the following way:

CAUTION This is a CAUTION.

NOTE Notes are written in the following way:

NOTE: This is a NOTE.

In this manual, the word “select” means choosing and confirming.

Illustrations and names

All illustrations in this manual are only examples, and may not necessarily reflect your system
settings or data displayed in your system. If a particular selection is not available in your system, the
selection is shown grayed.

In this manual, the concept MRI Monitor always refers to the MRI Monitor labeled as N-MRI2.

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Document no. M1041746 -1

1 Introduction

1.1 System introduction

The MRI Monitor is a modular multiparameter patient monitor. The monitor is especially designed for
multiparameter patient monitoring in MR environment. It can also be used during transportation
within the hospital, for example, when transporting the patient from induction to the MR environment.

The modular design makes the system flexible and easy to upgrade. In addition to patient parameter
modularity and easy upgrades, the monitor can be upgraded to anesthesia record keeping, wired
and wireless networking and memory card operation. Your system may also include Active Remote
Screen allowing full remote control over the MRI Monitor. Additionally, external devices can be
interfaced to the monitor with interface modules.

NOTE: Your system may not include all these components. Consult your local representative for the
available components.

1.1.1 MRI Monitor system components

Options for the MRI Monitor system

− Built-in recorder, N-CMREC1

− Wireless network option, N-CMW

− Active Remote Screen, N-MRIRemote (includes a fiber optic cable and Remote screen

converter)

− Network option, N-MRINET (includes a fiber optic Network cable and a fiber optic converter
board, B-FOC)

Introduction

Possible software options for the MRI Monitor

− MemCard option, N-CMMEM

MRI Monitor frame options

− N-SN (for ECG, SpO2, NIBP)

− N-PSN (for ECG, SpO2, NIBP, InvBP)

− N-PSNG (for ECG, SpO2, NIBP, InvBP, CO2, Patient O2 and N2O)

− N-SNG (for ECG, SpO2, NIBP, CO2, Patient O2 and N2O)

− N-PSNGV (for ECG, SpO2, NIBP, InvBP, CO2, Patient O2, N2O, anesthetic agents, agent

identification and patient spirometry)

− N-SNGV (for ECG, SpO2, NIBP, InvBP, CO2, Patient O2, N2O, anesthetic agents, agent
identification and patient spirometry)

MR compatible modules

− Hemodynamic MRI Module E-MRIPSN

− MRI Compact Airway Modules E-MRICO, E-MRICAiO and E-MRICAiOV

Active Remote Screen display option with built-in loudspeakers

− 19" LCD display, D-LCC19 - 01

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MRI Monitor

1.1.2 Monitoring in MR room

The MRI Monitor system in the MR room may consist of the elements shown in the picture below.

12

11

2

3

1

4

5

6

10

9

Figure 1 MRI monitoring system components in MR room

(1) MRI Monitor with MR compatible modules inside

(2) MRI Cart. You can also use a wall mount.

(3) Device Interfacing Solution, DIS

(4) Active Remote Screen fiber optic cable

(5) Fiber optic network cable

(6) Remote Controller, K-CREMCO

(7) MR scanner specific cardiac gating cable

8

7

(8) Anesthesia record keeping keyboard

(9) Mains power cable

(10) MR-specific SpO2 accessories (OXY-FMR, OXY-WMR)

(11) MR-specific ECG cable

(12) Datex-Ohmeda Wireless Network (WLAN) Access

Point, N-WAP, and WLAN antenna

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1.1.3 Monitoring in control room

Active Remote Screen is an external surveillance monitor for MRI Monitor. While the MRI Monitor is
placed inside the MR examination room, the Active Remote Screen is used outside the MR
environment in the control room to monitor the patient. The connection between the MRI Monitor and
Active Remote Screen is done over on fiber optic cable, which ensures safe and undisturbed data
transmission. The Active Remote Screen has the same functionality as the MRI Monitor and it allows
full remote control over the MRI Monitor. However, the MRI Monitor can not be turned on or to standby
through the Active Remote Screen.

The possible components are described below.

1

Introduction

4

3

2

6

5

Figure 2 MRI monitoring system components when using Active Remote Screen

(1) Active Remote Screen with built-in loudspeakers.

(2) Remote screen converter. Contains connectors for Active Remote Screen and anesthesia record

keeping keyboard or Command Bar K-MRIANEB.

(3) Fiber optic cable

(4) MRI Monitor

(5) Command Bar

(6) Anesthesia record keeping keyboard K-ARKB

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MRI Monitor

1.1.4 MR monitoring in network

1

5

2

4

3

Figure 3 MR monitoring in network

(1) MRI Monitor

(2) Fiber optic Network cable

(3) Fiber optic converter, N-FOC, which connects the monitor to the Datex-Ohmeda Network (wired

or wireless)

(4) Network printer

(5) Monitor-Network cable

Communication between monitors

You can use the MRI Monitor as a stand-alone monitor or for

− viewing and receiving data (alarms, vital signs) from other patient monitors

− gathering and storing data during intrahospital transportation.

To view other patient monitors, the monitor needs to be connected to network. To gather, store, and
transfer data between different monitors, use the Data Card or network communication.

NOTE: You cannot transfer data to the MRI Monitor from the Data Card; use network for this purpose.
The Data Card is for storage and transfer of patient data from the MRI Monitor. The Menu Card is used
for storing the anesthesia record keeping menus and configurations, and for loading and storing user
modes.

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1.1.5 Monitoring in wireless network

1

2

3

Introduction

1

Figure 4 MRI monitoring in wireless network

(1) Antennas

(2) Network cable

(3) Access point.

NOTE: Before installing the wireless monitoring network in the MR environment, the system must be
tested to avoid all the interference that it may cause to the MR pictures.

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MRI Monitor

1.2 MRI Monitor introduction

1.2.1 MRI Monitor parts and connections

5

6

7

8

9

10

11

12

4

3

2

1

13

14

15

1

17

18

19

20

6

21

Figure 5 MRI Monitor parts and connections

(1) Frame for MRI Monitor, F-MRICM1

(2) MRI Shield for MRI Monitor, N-MRI2

(3) Hemodynamic MRI module, E- MRIPSN

(4) Slot for memory cards (PCMCIA)

(5) D-fend

(6) Spirometry connectors

(7) NIBP connector

(8) ECG connector

(9) InvBP connector

(10) SpO2 connector

(11) Air filter

(12) MRI Compact Airway Module E-MRICxx

22

23

24

(13) Air filter

(14) Recorder, N-CMREC1

(15) Connectors for Active Remote Screen

(16) Connector for Device Interfacing Solution, DIS

(17) Cardiac (ECG) gating connector

(18) Network connectors

(19) Mains power inlet

(20) Connector for anesthesia record keeping keyboard

or K-CREMCO

(21) Side panel keys

(22) ComWheel

(23) Command Board

(24) High magnetic field alarm led

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1.2.2 MRI Monitor frame options and modules

The MRI Monitor has the following frame and module options available.

Parameter Frame options and modules

Introduction

ECG, SpO2 and NIBP

• N-SN, N-SNG, N-SNGV, N-PSN, N-PSNG or N-PSNGV

• E-MRIPSN module

InvBP (up to 2)

• N-PSN, N-PSNG or N-PSNGV

• E-MRIPSN module

, Patient O2 and N2O

CO

2

• N-PSNG, N-SNG, N-PSNGV or N-SNGV

• E-MRICO, E-MRICAiO or E-MRICAiOV

Anesthetic agents, agent identification

• N-PSNG, N-SNG, N-PSNGV or N-SNGV

• E-MRICAiO or E-MRICAiOV

Spirometry

• N-PSNGV or N-SNGV

• E-MRICAiOV

− Hemodynamic MRI Module E-MRIPSN measures ECG, SpO2, NIBP and InvBP (two pressures,
optional).

− MRI Compact Airway Modules E-MRICO, E-MRICAiO and E-MRICAiOV measure CO2 (C), O2 (O),
Spirometry (V), anesthetic agents (A) and agent identification (i).

NOTE: The modules are preinstalled inside the shield and they can only be changed by authorized
service personnel.

1.2.3 Connector panel

The connectors for the different parameter accessories are located on the connector panel on the left
side of the shield. The frame option determines the connectors included in the panel. Below is an
example of the connector panel in the frame option N-PSNGV.

1

3 4 5

2

(1) Spirometry connectors (optional)

(2) D-Fend with sampling line connector (optional)

(3) ECG connector

(4) NIBP connector

(5) InvBP connector (optional)

(6) SpO2 connector

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MRI Monitor

1.2.4 MRI Cart

MRI Cart has been designed for MR environment. It allows you to move the monitor around the MR
room, if necessary.

1

2

3

Figure 6 MRI Cart

(1) Mounting plate for the MRI Monitor

(2) Drawer for small MR compatible accessories

NOTE: The maximum load of the MRI Cart drawer is 400 g (0.9 lb).

(3) Compartment for the manuals

(4) Caster brakes

NOTE: The maximum load of the MRI Cart monitor arm is 25 kg (55.12 lb).

4

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1.3 Symbols

1.3.1 Symbols on transport packaging

The contents of the transport package are fragile and must be handled with care.

Indicates the correct upright position of the transport package.

The transport package must be kept in a dry environment.

Indicates the temperature limitations within which the transport package should be
stored.

Introduction

1.3.2 Symbols on equipment

1.3.3 Equipment safety symbols

- Attention, consult accompanying documents.

- When displayed next to the O2 value, indicates that the FiO2 low alarm limit is set
below 21%.

- On the connector panel this symbol indicates that for pulse oximetry (SpO
invasive pressures (P1-P2), the patient isolation and protection against cardiac

defibrillator discharge are based on the SpO
accessories.

- On the rear panel this symbol indicates the following warnings and cautions:
* Electric shock hazard. Do not open the cover or the back. Refer servicing to
qualified service personnel.
* For continued protection against fire hazard, replace the fuse only with one of
the same type and rating.

* Do not touch a battery-operated monitor during defibrillation procedure.

* Disconnect from the power supply before servicing.
* Do not use the monitor without manufacturer approved mounting attached.
* Lithium battery on the CPU board: follow the regional regulations for disposal.

and invasive blood pressure

2

) and

2

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MRI Monitor

Type BF (IEC 60601-1) protection against electric shock.

Type BF (IEC 60601-1) defibrillator-proof protection against electric shock.

Type CF (IEC 60601-1) defibrillator-proof protection against electric shock.

When displayed in the upper left corner of the screen, indicates that the alarms are
silenced. When displayed in the menu or digit fields, indicates that the alarm source
has been turned off or alarm does not meet the alarm-specific activation criteria.

ESD warning symbol for electrostatic sensitive devices. Pins of connectors identified
with the ESD warning symbol should not be touched. Connections should not be
made to these connectors unless ESD precautionary procedures are used. For
details, see section “1.4.2. ESD precautionary procedures”.

1.3.4 Other symbols

Symbol for non-ionizing electromagnetic radiation. Interference may occur in the
vicinity of equipment marked with this symbol.

Symbol on the led on the front panel of the shield. The led indicates if the magnetic
field is too strong.

Symbol on the MRI Cart drawer cover. Do not place any non-MR-compatible items in
the MRI Cart.

Equipotentiality. Monitor can be connected to potential equalization conductor.

Alternating current

Fuse. Replace the fuse only with one of the same type and rating.

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Introduction

SN, S/N

Serial Number

Battery operation and remaining capacity (green bar)

Battery charging (white bar)

Submenu. Selecting an alternative marked with this symbol in a menu opens a new
menu.

The monitor is connected to the Datex-Ohmeda Network (LAN).

The monitor is connected to the Datex-Ohmeda Network (WLAN).

Data Card (green) and/or Menu Card (white) is inserted.

WLAN signal strength. The number of segments corresponds to the signal strength:
four segments indicate strong signal, one segment weak signal. When connection to
access point is being searched, the segments scroll from zero to four and back.

A blinking heart next to the heart rate or pulse rate value indicates the beats
detected.

Do not reuse.

Use by. Indicates the last use day.

Date of manufacturer

Does not contain Latex.

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MRI Monitor

Do not immerse the sensor in liquids.

IPX class:

IPX0
IPX1
IPX2
IPX3
IPX4
IPX7
IPX8

Degree of protection against harmful ingress of water as detailed in the
IEC 60529:

- Ordinary equipment

- Protection against vertically falling water drops.

- Protection against vertically falling water drops when enclosure tilted up to 15 °.

- Protected against spraying water.

- Protected against splashing water.

- Protected against the effects of temporary immersion in water.

- Protected against the effects of continuous immersion in water.

This symbol indicates that the waste of electrical and electronic equipment must not
be disposed as unsorted municipal waste and must be collected separately. Please
contact an authorized representative of the manufacturer for information concerning
the decommissioning of your equipment.

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Introduction

1.4 Safety

The following list contains general warnings and cautions you should know before installing,
maintaining or servicing the system. Warnings and cautions specific to the use of the system can be
found in the User’s Guide and User’s Reference Manual.

1.4.1 Safety precautions

Warnings

WARNING A WARNING indicates a situation in which the user or the patient may be in

danger of injury or death.

Power connection

Use only hospital-grade grounded power outlets and power cord. Do not remove the grounding

•

pin from the power plug.

• The Active Remote Screen and printer must be supplied from an additional transformer

providing at least basic isolation (isolating or separating transformer).

• Use only an intact power cord. Replace the power cord if it is cracked, frayed, broken or

otherwise damaged.

• Do not apply tension to the power cord otherwise the cord may get damaged.

• Do not use an additional multiple socket outlet, extension cord or adapters of any kind.

• Before starting to use the system, ensure that the whole combination complies with the

international standard IEC 60601-1-1 and with the requirements of the local authorities. Do
not connect any external devices to the system other than those specified.

• If the integrity of the external protective earth conductor arrangement is in doubt, use the

monitor with battery operation.

• To avoid the risk of electric shock, this equipment must only be connected to a supply mains

with protective earth.

Installation

The monitor contains some ferromagnetic material.

•

• Do not install or use the monitor inside the 300 Gauss line. Verify the 300 G line from the safety

instructions of the MRI imaging equipment.

• Inside the 300 G line the monitor is subject to the attraction of the magnetic field.

• The MRI Monitor has been designed for MR environment. The MR scanners, however, may be

capable of causing injury if the given instructions are not followed, especially with respect to
electrically conducting lead positioning and safety distance from the magnet.

• The MRI Monitor has been designed to tolerate high magnetic field strengths over short-term

periods. High magnetic field strengths may, however, be destructive to the MRI Monitor
electronics. Always keep the MRI Monitor outside the 300 G line.

• The MRI Monitor parameters will be shut down if MRI Monitor is taken to higher magnetic field

strengths than 400 G to protect the MRI Monitor electronics. No parameter information can be
seen on the monitor screen during this time.

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MRI Monitor

• The MRI Monitor has been validated to tolerate up to 300 G magnetic field strength. Higher field

strengths may interfere with the MRI Monitor parameter measurements. Always keep the MRI
Monitor outside the 300 G line.

• Use the monitor during Magnetic Resonance Imaging (MRI) only together with MR compatible

modules E-MRIPSN, E-MRICO, E-MRICAiO, and E-MRICAiOV.

• Only personnel who are aware of possible risks involved with patient monitoring in the MR

environment should perform the monitoring.

• Do not use the system with the MRI devices with static magnetic field stronger than 3 T.

• Do not place the system closer than the 300 G line to the MRI device.

• MRI Monitor is intended to be mounted to a fixed structure if the MRI Cart is not used. Do not

use the monitor without manufacturer approved mounting attached.

• Do not tilt the MRI Cart more than 10°.

• The MRI Cart is intended to be used only for the MRI Monitor (labeled as N-MRI2) that can

tolerate 300 G magnetic field or less.

• Do not place any non-MR-compatible items in the MRI Cart and not more than 400 g (0.9 lb) of

weight in the MRI Cart drawer.

• Keep the MRI Cart outside 300 G line.

• Always keep the caster breaks locked when you are not moving the MRI Cart.

• MRI Cart has been designed for MR environment. The MRI Cart allows you to move the monitor

around the MRI room, if necessary. Tie the cart with an inelastic, strong rope to the MR room
wall to avoid moving the MRI Monitor unintentionally too close to the magnet.

• The monitor or its components should not be used adjacent to or stacked with other equipment.

If adjacent or stacked use is necessary, the monitor and its components should be observed to
verify normal operation in the configuration in which it will be used.

• Pins of connectors identified with the ESD warning symbol should not be touched. Connections

should not be made to these connectors unless ESD precautionary procedures are used. For
details, see section “1.4.2. ESD precautionary procedures”

• After transferring or reinstalling the monitor, always check that it is properly connected and all

parts are securely attached. Pay special attention to this in case of stacked mounting.

• If you accidentally drop the monitor, modules or frames, have them checked by authorized

service personnel prior to clinical use.

External connection

Do not connect any external devices to the monitor other than those specified.

•

Fuse replacement

Replace a fuse only with one of the same type and rating.

•

Explosion hazard

To avoid explosion hazard do not use the monitor in the presence of flammable anesthetics. The

•

monitor measures only non-flammable anestethics.

Patient safety

Do not perform any testing or maintenance on the monitor while it is being used on a patient.

•

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Introduction

• Never install the monitor so that it is above the patient.

• The monitor must not be used without manufacturer approved mounting attached.

• Operation of the monitor outside the specified values may cause inaccurate results.

• Never turn the volume off from Active Remote Screen display. If the volume is silenced from the

display, all patient alarms will be silenced and there will be no visible indication of the silenced
state.

• If you are using a display that does not have built-in speakers, use external loudspeakers.

• If you are using external loudspeakers, always make sure that audio cables are properly

connected.

Cleaning and service

Only trained personnel with proper tools and test equipment should perform the tests and

•

repairs described in this manual. Unauthorized service may void the monitor warranty.

• Always unplug the monitor before cleaning or service. After cleaning or service ensure that every

part of the monitor is dry before reconnecting it to the power supply.

• Do not touch any exposed wire or conductive surface while any cover is removed and the

monitor is energized. The voltages present can cause injury or death.

• Pins of connectors identified with the ESD warning symbol should not be touched. Connections

should not be made to these connectors unless ESD precautionary procedures are used. For
details, see section “1.4.2. ESD precautionary procedures”.

• Always perform an electrical safety check and a leakage current test on the monitor after

service.

• Handle the water trap and its contents as you would any body fluid. Infectous hazard may be

present.

Accessories

Use only approved cables, mounts, batteries, invasive pressure transducers and MR

•

compatible accessories. For a list of approved supplies, accessories and mounts, see section
“MRI accessories” in the User’s Guide or User’s Refence Manual and the "Supplies and
Accessories" catalog. Other cables, transducers and accessories may cause a safety hazard,
damage the equipment or system, result in increased emissions or decreased immunity of the
equipment or system or interfere with the measurement.

• ECG and SpO

made of non-metallic materials, either fiber optic or silicon plastic, and can safely be used in
MR environment. All other listed accessories are non-ferrous and designed so that they can be
safely used in MR environment. The accessories designed for use with this device are made of
biocompatible materials conforming to requirements of the standard EN 30993 Biological
Evaluation of Medical Devices and therefore do not contain toxic ingredients or primary skin
irritants. The conformity is based either on laboratory testing or material knowledge and the long
history of the materials used.
Please note that some products are not available worldwide. You can check the availability with
your local GE Healthcare representative.

monitoring requires specific MR compatible accessories. These accessories are

2

• Single use accessories are not designed to be reused. Reuse may cause a risk of contamination

and/or affect the measurement accuracy.

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MRI Monitor

Cautions

CAUTION A CAUTION indicates a condition that may lead to equipment damage or malfunction.

Installation

Leave space for air circulation to prevent the monitor from overheating.

•

• Before connecting the power cord to the power supply, check that the local voltage and

frequency correspond with the rating stated on the device plate.

• Various MRI systems and RF coils feature significant differences in their technical design. The

ability of the RF coil and MRI system to tolerate external RF interference may differ from that of
the environment where the MRI Monitor was tested. Thus it is recommended that the users run
interference tests before taking the MRI Monitor in use to recognize the potential RF interference
caused by the MRI Monitor.

Before use

Allow two minutes for warm-up and note any error messages or deviations from normal

•

operation.

MRI Cart

Rough use of the MRI Cart may cause damage to the Cart. If damage is found, the Cart must be

•

removed from use until it has been serviced by authorized service personnel.

Autoclaving and sterilizing

Do not autoclave any part of the monitor.

•

• Do not gas sterilize the modules.

Cleaning and service

Do not use hypoclorite, ammonia-, phenol-, or acetone based cleaners. These cleaners may

•

damage the monitor surface.

• Do not immerse any part of the device in any liquid, or allow liquid to enter the monitor or

modules.

• Do not apply pressurized air to any outlet or tubing connected to the monitor.

• Electrostatic discharge through the PC boards may damage the components. Before handling

PC boards, wear a static control wrist strap. Handle all PC boards by their non-conductive edges
and use anti-static containers when transporting them.

• Do not break or bypass the patient isolation barrier when testing PC boards.

• If liquid has accidentally entered the system or its parts, disconnect the power cord from the

power supply and have the equipment serviced by authorized service personnel.

Special components

Special components are used in these monitors that are vital to assure reliability and safety. GE

•

Healthcare assumes no responsibility for damage, if replacement components not approved by
GE Healthcare are used.

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Introduction

• A lithium battery on the CPU Board. Dispose of the faulty IC containing the battery according to

local regulations.

Batteries

To replace the batteries safely, please refer to the service instructions in this manual.

• Do not short-circuit the battery terminals, this may produce a very high current, which will

damage the battery.

• Do not dispose of the battery into open flame, nor put the battery near fire, as it may explode.

• Do not dismantle the battery.

See also section “Symbols”.

Storage and transport

Do not store or transport the monitor outside the specified temperature, pressure and humidity
ranges:

Temperature -10...+50 °C/14...122 °F

Atmospheric pressure 660...1060 hPa/500...800 mmHg/660...1060 mbar

Relative humidity 10...90% noncondensing

1.4.2 ESD precautionary procedures

To avoid electrostatic charges building up, it is recommended to store, maintain and use the

•

equipment at a relative humidity of 30% or greater. Floors should be covered by ESD dissipative
carpets or similar. Non-synthetic clothing should be used when working with the component.

• To prevent applying a possible electrostatic discharge to the ESD sensitive parts of the

equipment, one should touch the metallic frame of the component or a large metal object
located close to the equipment. When working with the equipment and specifically when the
ESD sensitive parts of the equipment may be touched, a grounded wrist strap intended for use
with ESD sensitive equipment should be worn. Refer to the documentation provided with the
wrist straps for details of proper use.

ESD precautionary procedure training

It is recommended that all potential users receive an explanation of the ESD warning symbol and
training in ESD precautionary procedures.

The minimum contents of an ESD precautionary procedure training should include an introduction to
the physics of electrostatic charge, the voltage levels that can occur in normal practice and the
damage that can be done to electronic components if they are touched by an operator who is
electrostatically charged. Further, an explanation should be giv en o f m e th o ds to p re v en t b u il d -u p o f
electrostatic charge and how and why to discharge one’s body to earth or to the frame of the
equipment or bond oneself by means of a wrist strap to the equipment or the earth prior to making a
connection.

1.4.3 Disposal

Dispose of the whole device, parts of it and its packing material in accordance with local
environmental and waste disposal regulations.

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2 System description

2.1 Introduction

MRI Monitor is based on the same system architecture as other modular Datex-Ohmeda monitors.
The architecture is designed to enable different module combinations so that the user is able to get
the desirable parameter and feature set. This modular approach makes it possible to add new
features when they are needed.

2.2 Bus structure

Patient

Patient

Patient

Modules

Module

Module

MODULE-BUS

PCMCIA Serial

Non-

Volatile

Memory

Reset

Logic

Boot

Memory

Ethernet Sound UPI

ISA-BUS

Code

Memory

Display

Controller

Chipset

486 LOCAL BUS

DRAM

486

Processor

cam_p1_gnrl_bus_strctr_cm.vsd

Figure 7 General bus structure of MRI Monitor

The CPU bus is a communication channel used only for internal data transfer. It is based on the ISA
bus used in IBM PC computers. Data is transferred on this 16 bit wide bus using the CPU clock
frequency.

The module bus is for the parameter modules. The bus is based on the industry standard RS-485,
which uses a differential serial method to transfer data. This type of bus is robust and it allows
parameter modules to be inserted or removed while the power is on. The module bus uses a 500 kbps
data transfer rate.

The RS-485 type of serial communication supports so-called multidrop or party line connections. This
means that all parameter modules connected to the module bus use exactly the same lines for
communication.

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2.3 Distributed processing

The system is a multiprocessor system. All parameter modules have their own microprocessor, which
performs functions such as module key control, waveform filtering, parameter related computing and
pneumatic control, etc. At the same time the main CPU performs higher level tasks such as trending
and alarm control. While the parameter modules and CPU are performing their tasks, the UPI
(Universal Peripheral Interface) microprocessor handles all functions needed to transfer data
between the parameter modules and the CPU.

This kind of parallel processing gives one major advantage to centralized processing. When new
parameter modules are added to the system, the processing power is increased. As a result, the
system does not slow down when new features are added.

2.4 Module communication

The communication master controlling data transfers between the CPU and parameter modules is
called UPI processor. It sends data to each connected module 100 times a second. Modules respond
to each data request immediately by sending a data package, whose length depends on the type of
the module. This communication protocol ensures that each module receives and sends data every
10 ms. If a module does not respond to data requests, the UPI processor presumes that the module is
disconnected.

Parameter modules may hold a static (fixed) or dynamic address, which the UPI processor uses when
sending out data. Two parameter modules of the same type must not be fitted onto the same monitor
since they might reply to a data request simultaneously, thus causing communication errors.

System description

Voltage

Temp

Meas

Meas

Shared

SRAM

Control

ISA-BUS

Logic

Processor

UPI

Analog & Digit al outputs

Module Bus

ComWheel I nterface

Keypad Interface

cam_p1_prncpl_UPI_operation.vsd

Figure 8 Principle of UPI section operation

The UPI processor collects and stores all data that is received from the parameter modules into a
shared SRAM, which is mapped directly to the address space of the main CPU. The main CPU reads
data from the memory while the UPI processor guarantees that the data is up to date. This operation
also works in the other direction. In this the main CPU fills the shared SRAM with data and the UPI
processor distributes it to the parameter modules.

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MRI Monitor

2.5 Software loading

The program memory on the CPU board is loaded with monitor software at the factory. The software is
used for running all the functions that are integrated into the PC board. For service and upgrade
procedures, the CPU board is fitted with a PCMCIA card drive through which new software can be
loaded.

2.6 Parameter modules

PATIENT

Module

keys

Analog

electronics

Peripheral

drivers

A/D

converter

RAM

EEPROM

+5 V

+12 V

CPU

Isolation

transformer

Patient isolation

Opto

isolation

+13...16 V

VMOD

Data

RS485
drivers

Module Bus

Figure 9 General structure of parameter modules with patient isolation

The detailed structure of a parameter module depends on the specific needs for each individual
parameter. However, some common parts are used in the parameter modules. The electronics inside
the module is usually divided into isolated (floating) and non-isolated sections. Typically, the
non-isolated section consists of buffers to interface the parameter module to the module bus while
the rest of the electronics is located in the isolated section. The isolated section includes the
microcontroller together with memory components, the front-end analog electronics (amplifiers, etc.)
and sensor drivers.

eneral_struct_of_parm_mod.vsd

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