Table of Contents
Advertisement
Quick Links
Datex-Ohmeda
TM
S/5
NeuroMuscular Transmission Module, M-NMT (Rev. 02)
Technical Reference Manual Slot
All specifications are subject to change without notice.
Document No. 800 1018-1
June 2001
Datex-Ohmeda Inc.
Datex-Ohmeda Division,
3030 Ohmeda Drive
Instrumentarium Corp.
53707-7550 MADISON, WIS
P.O. Box 900, FIN-00031
DATEX-OHMEDA, FINLAND
USA
Tel. +358 10 394 11 Fax +358 9 146 3310
Tel. +1-608-221 1551, Fax +1-608-222 9147
www.datex-ohmeda.com
www.us.datex-ohmeda.com
Instrumentarium Corp. All rights reserved.
Advertisement
Table of Contents
Troubleshooting
Subscribe to Our Youtube Channel
Related Manuals for Datex-Ohmeda M-NMT
Summary of Contents for Datex-Ohmeda M-NMT
- Page 1 Datex-Ohmeda NeuroMuscular Transmission Module, M-NMT (Rev. 02) Technical Reference Manual Slot All specifications are subject to change without notice. Document No. 800 1018-1 June 2001 Datex-Ohmeda Inc. Datex-Ohmeda Division, 3030 Ohmeda Drive Instrumentarium Corp. 53707-7550 MADISON, WIS P.O. Box 900, FIN-00031 DATEX-OHMEDA, FINLAND Tel.
-
Page 3: Table Of Contents
Service Menu 5.1 NMT menu..............................17 Spare parts 6.1 Spare part list............................19 6.1.1 NMT Module, M-NMT rev. 00......................19 6.1.2 NMT Module, M-NMT rev. 01......................19 6.1.3 NMT Module, M-NMT rev. 02......................19 6.1.4 Front panel stickers for AS/3 modules (square buttons) ..............20 6.1.5 Front panel stickers for S/5 modules (round buttons)...............20... -
Page 4: Table Of Figures
Datex-Ohmeda S/5 monitors Service check form TABLE OF FIGURES Figure 1 NeuroMuscular Transmission Module, M-NMT ..................1 Figure 2 Principle of response measurement ...................... 4 Figure 3 Serial communication and opto isolation....................5 Figure 4 Stimulator block diagram........................5 Figure 5 Module troubleshooting flowchart .......................15... -
Page 5: Introduction
INTRODUCTION This section provides information for the maintenance and service of the NeuroMuscular Transmission Module, M-NMT. The M-NMT module is a single width plug-in module designed for use with the S/5 Anesthesia and Compact Anesthesia Monitors. The module contains peripheral nerve stimulation and response measurement which supports electromyography EMG. -
Page 6: Specifications
Datex-Ohmeda S/5 monitors SPECIFICATIONS 1.1 General specifications Module size, W × D × H 37 × 180 × 112 mm / 1.5 × 7.1 × 4.4 in Module weight 0.37 kg /0.8 lbs Power consumption 3.3 W 1.2 Technical specifications 1.2.1 NMT... -
Page 7: Functional Description
NeuroMuscular Transmission Module, M-NMT FUNCTIONAL DESCRIPTION 2.1 Measurement principle 2.1.1 Nerve stimulation There are three stimulus modes in the NeuroMuscular Transmission Module: Train of Four (TOF), Double Burst 3,3 (DBS) and Single Twitch (ST). In the Train of Four stimulus mode, four stimulation pulses are generated at 0.5 second intervals. -
Page 8: Response
Datex-Ohmeda S/5 monitors 2.1.2 Response Before each stimulation, the sequence offset, noise and threshold for the response detection is measured. Offset is a baseline of the noise measurement. Noise is calculated by the same algorithm as the response signal itself. The response detection threshold is calculated based on the noise, and if the response is not greater than the threshold then it is interpreted as no response. - Page 9 NeuroMuscular Transmission Module, M-NMT microprocessor for the stimulation and measuring control, and for counting the measuring • results serial communication • The serial bus speed is 500 kbps and the bus itself is half duplex, i.e. data can be transferred in both directions but only one way at a time.
-
Page 10: Connectors And Signals
Datex-Ohmeda S/5 monitors 2.3 Connectors and signals 2.3.1 Module bus connector Table 1 Module bus connector (X1) Pin No. Signal RESET_RS485 -15 VDC +15 VDIRTY +15 VDC -DATA_RS485 DATA_RS485 Ground & Shield -RESET_RS485 CTSB RTSB RXDB TXDB Ground & Shield... -
Page 11: Front Panel Connector
NeuroMuscular Transmission Module, M-NMT 2.3.2 Front panel connector NMT connector (NMT) Pin No. Signal EMG Signal + EMG Signal - Not Used Stimulus + Stimulus - Ground Not Connected Sensor Identification +5 V Mechanical Signal Document No. 800 1018-1... -
Page 12: Service Procedures
Datex-Ohmeda S/5 monitors SERVICE PROCEDURES 3.1 General service information Field service of the NeuroMuscular Transmission Module, M-NMT, is limited to replacing faulty circuit boards or mechanical parts. Faulty circuit boards should be returned to Datex-Ohmeda for repair. Datex-Ohmeda is always available for service advice. Please provide the unit serial number, full type designation, and a detailed description of the fault. -
Page 13: Service Check
NeuroMuscular Transmission Module, M-NMT 3.2 Service check These instructions include complete procedures for a service check. The service check is recommended to be performed after any service repair. However, the service check procedures can also be used for determining possible failures. - Page 14 Datex-Ohmeda S/5 monitors Turn the monitor on and wait until the normal monitoring screen appears. • Configure the monitor screen so that information regarding the NMT measurement is shown, • for example: Monitor Setup - Screen 1 Setup - Digit Fields - Field 4 - Nmt Preset the NMT measurement settings: •...
- Page 15 ComWheel. Check that the test was successful with all three test currents, i.e. the “Current test (mA):” on the menu states 30 OK, 50 OK and 70 OK. Connect the M-NMT ElectroSensor leads to the NMT simulator. Set the switch on the •...
- Page 16 Check that the NMT measurement stops and the message “Measurement OFF” appears in the digit field for NMT five minutes after the start of the ST stimulation. Replace the M-NMT ElectroSensor with the M-NMT MechanoSensor and check that “Cable” on the service menu states PIEZO.
-
Page 17: Disassembly And Reassembly
Fill in all necessary documents. • 3.3 Disassembly and reassembly Disassemble the NeuroMuscular Transmission Module, M-NMT, in the following way. See the exploded view of the module. Remove the two screws from the back of the module. Pull the module box slowly rearward and detach it from main body. Be careful with the loose latch and spring locking pin. -
Page 18: Troubleshooting
Datex-Ohmeda S/5 monitors TROUBLESHOOTING 4.1 Troubleshooting chart Trouble Cause Treatment Check the stimulus electrodes. Loose electrodes or loose stimulus Change or attach the electrodes or clip. clip. EMG electrode off. Supramax. not found. Loose electrodes or loose stimulus Change or attach the electrodes or clip. -
Page 19: Troubleshooting Flowchart
NeuroMuscular Transmission Module, M-NMT 4.2 Troubleshooting flowchart Possible fault in NMT module Open NMT Service Menu Check Timeouts, Bad checksums, Bad c-s by mod Does another module Replace NMT board work in the same slot? Fault not in NMT module... -
Page 20: Service Menu
Datex-Ohmeda S/5 monitors SERVICE MENU Monitor Setup Press the key. Select Install/Service (password 16-4-34). Select Service (password 26-23-8). Select Parameters. Select NMT. Document No. 800 1018-1... -
Page 21: Nmt Menu
T1%/ref T1% / ref gives a selection for changing settings related to the M-NMT MechanoSensor. A setting of 3 should always be used for normal monitoring. The settings 1 and 2 are for research purposes only. - Page 22 Datex-Ohmeda S/5 monitors Absolute T1, T2 shows the voltage measured from the A/D converter. Noise indicates the interference just before the measurement. A typical value is <10. Offset is an average of the noise measurement. A typical value is 510.
-
Page 23: Spare Parts
NeuroMuscular Transmission Module, M-NMT SPARE PARTS 6.1 Spare part list NOTE: Accessories are listed in the Patient Monitor Supplies and Accessories. 6.1.1 NMT Module, M-NMT rev. 00 Item Description Order No. Item Description Order No. Module box (single width) 886167 NMT board, M-NMT (Rev. -
Page 24: Front Panel Stickers For As/3 Modules (Square Buttons)
6.1.4 Front panel stickers for AS/3 modules (square buttons) Front panel stickers that are related to the Compact Module type and adaptation: Adaptation codes: DA=Danish, DE=German, EN=English, ES=Spanish, FI=Finnish, FR=French, IT=Italian, JA=Japanese, NL=Dutch, NO=Norwegian, PT=Portuguese, SV=Swedish Item 13. M-NMT (rev. 00-01) Adaptation Order No. 892217 886003 886002... -
Page 25: Earlier Revisions
NeuroMuscular Transmission Module, M-NMT EARLIER REVISIONS This manual also supports earlier module revision 00. Document No. 800 1018-1... - Page 26 Datex-Ohmeda S/5 monitors Document No. 800 1018-1...
- Page 27 APPENDIX A, Service Check Form, M-NMT APPENDIX A Document No. 800 1018-1...
- Page 28 Datex-Ohmeda S/5 monitors Document No. 800 1018-1...
- Page 29 APPENDIX A, Service Check Form, M-NMT SERVICE CHECK FORM NeuroMuscular Transmission Module, M-NMT Customer Service Module type Service engineer Date OK = Test OK N.A. = Test not applicable Fail = Test Failed N.A. Fail N.A. Fail 1. Internal parts 2.
- Page 30 Datex-Ohmeda S/5 monitors 13. Stimulus pulse width 100 µs 300 µs Allowed range TOF% 95-105 Count 95-105 N.A. Fail 14. No response 15. DBS measurement with NMT simulator 950-1059 950-1059 Ratio% 950-1059 DBS% 95-105 Count 95-105 16. ST measurement with NMT simulator...
Need help?
Do you have a question about the M-NMT and is the answer not in the manual?
Questions and answers