Braun Stimuplex HNS 12 Operating manual

Regional Anesthesia
Stimuplex®HNS 12
Nerve Stimulator for
Peripheral Regional Anesthesia
Technical Service Manual
0366
hns12_stim_techn_16s_gb 26.07.2006 14:47 Uhr Seite 1

Manufacturer: Distributor:
STOCKERT GMBH B. Braun Melsungen AG
Bötzinger Straße 72 Hospital Care Division
79111 Freiburg 34209 Melsungen
Germany Germany
Phone: [phone] Phone: [phone]
Fax: [phone] Fax: [phone]
E-mail: [email protected] E-mail: [email protected]
http://www.stockert.de http://www.bbraun.com
In the US and Canada distributed by:
B. Braun Medical Inc.
824 Twelfth Avenue
P.O. Box 4027
Bethlehem, PA 18018
Phone: [phone]
Fax: [phone]
E-mail: [email protected]
http://www.bbraunusa.com/stimuplex
CCaauuttiioonn::
TThheeSSttiimmuupplleexx®®HHNNSS1122mmaayyoonnllyybbeeuusseeddiinnaapppplliiccaattiioonnssffoorrwwhhiicchhtthhiisspprroodduuccttiiss
iinntteennddeedd..
FFeeddeerraall((UUSS))llaawwrreessttrriiccttsstthhiissddeevviicceettoossaalleebbyyoorroonntthheeoorrddeerrooffaapphhyyssiicciiaann..
Stimuplex® HNS 12 Technical Service Manual
Order number: 604 3572 – Rev. A – valid for software version 1.002.x
Meliseptol® and Stimuplex® are registered trademarks of B. Braun Melsungen AG
hns12_stim_techn_16s_gb 01.08.2006 9:20 Uhr Seite 2

3
Contents
Contents Page
1. Technical data................................................................................................................................................5
1.1 Battery ..............................................................................................................................................................5
1.2 Cleaning and disinfecting the Stimuplex® HNS 12..............................................................................6
2. Maintenance and technical safety checks (with battery installed) ........................................7
2.1 Visual inspection of Stimuplex® HNS 12 including accessories ......................................................7
2.2 Functional check of Stimuplex® HNS 12 ................................................................................................7
3. Instructions for technical safety checks ............................................................................................9
3.1 Visual inspection of Stimuplex® HNS 12 and accessories ................................................................9
3.2 Functional check of Stimuplex® HNS 12 ................................................................................................9
3.3 Checking the operating controls and monitoring equipment ..........................................................9
3.4 Checking the accessories ..........................................................................................................................10
3.5 Checking the stimulation signal ..............................................................................................................11
4. Replacing the electrode cables ............................................................................................................12
5. Repairs............................................................................................................................................................13
hns12_stim_techn_16s_gb 26.07.2006 14:47 Uhr Seite 3

4
The Stimuplex® HNS 12 is a nerve stimulator used for locating peripheral nerves in regional anes-
thesia and pain therapy.
The Stimuplex® HNS 12 is a class lla medical device according to Council Directive 93/42/EEC.
The device should not be used until it has been subjected to an on-site function test and the persons
responsible for operating the device are instructed now to use the device with the aid of the user
manual.
hns12_stim_techn_16s_gb 02.08.2006 7:28 Uhr Seite 4

5
1. Technical data
Type: Stimuplex® HNS 12
Instrument type: BF
Battery: 9 V (alkaline)
Power consumption: 6 mA (8 mA maximum)
Stimulation current: = 5 mA (maximum) (0-12 kΩ)
Stimulation voltage: U
^= 95 V (maximum)
Stimulation frequency: 1 Hz / 2 Hz +/- 1%
Stimulus duration:
0.05 ms – 0.10 ms – 0.30 ms – 0.50 ms – 1.00 ms +/- 1%
Allowable load impedance: 0 kΩ– 12 kΩ
Current measuring accuracy: +/- 0.02 mA
Impedance measuring range: 1 kΩ– 90 kΩfor target stimulation current > 0.5 mA
Impedance measuring accuracy: +/- 10 % for stimulation current > 1 mA
+/- 20 % for stimulation current <= 1 mA
Sound pressure level: 51 dB / 54 dB / 63 dB for stimulation/warning/ error
Weight: 250 g
Ambient conditions during operation: 0 – 50 °C, maximum 90 % relative humidity,
no condensation
1.1 Battery
The battery charge status must be checked regularly (MENU info = state of charge indicated in
“percent” and “volt”). Whenever the battery symbol is flashing, the current application can be com-
pleted without problems, but the battery should be replaced afterwards.
Please do not replace the battery when the device is switched on. This may damage the LCD
display.
If the voltage is less than 6.00 V, an error message will be displayed and the device will switch off
automatically. Replace battery.
If the Stimuplex® HNS 12 nerve stimulator is not intended to be used for a long period of time, the
battery must be removed to prevent leakage.
The battery compartment is located in the base of the nerve stimulator. When installing the battery,
ensure correct polarity and that the battery contacts are not pressed too tightly together to ensure
solid contact.
Only use 9 V alkaline manganese batteries – e.g. VARTA 4922, DURACELL MN 1604.
These will provide you with an optimum operating time.
hns12_stim_techn_16s_gb 26.07.2006 14:47 Uhr Seite 5

6
WARNING!
If the battery is leaking, Stimuplex® HNS 12 should no longer be operated for reasons of safety.
It must be returned to the manufacturer for correct cleaning and a safety check.
1.2 Cleaning and disinfecting Stimuplex® HNS 12
Use only soft, damp cloths to clean and disinfect Stimuplex® HNS 12 and electrode cables. Water
and soap are especially suited for this purpose. Ensure that no moisture penetrates Stimuplex ® HNS 12.
Use only wipe disinfection, no spray disinfection! Avoid condensation!
For disinfection, you can use Meliseptol®.
hns12_stim_techn_16s_gb 26.07.2006 14:47 Uhr Seite 6

7
2. Maintenance and technical safety checks (with battery installed)
We recommend running the following simple checks before starting up operation for the first time
and then regularly (e.g. before daily use):
--Visual inspection of device and accessories
--Functional check of device
2.1 Visual inspection of Stimuplex® HNS 12 including accessories
The following components must be clean and undamaged and not show any contamination:
• Housing
• Labels
• Operating controls (instant set keys)
• Keypad
• LCD display
• Controller dial (digital control knob)
• Connecting ports
• Electrode cable (e.g. insulation or electrodes not broken)
• Test resistor
If included:
• Stimuplex® Remote Control
• Stimuplex® Pen
Never use damaged equipment or accessories!
After visual inspection is successful, carry out the function test.
2.2 Functional check of Stimuplex® HNS 12
Switch on the nerve stimulator. Target stimulation current = 0.00 mA, LED is not flashing, and no
sound is audible. Battery symbol may not be flashing (battery voltage > 7 V).
• Connect electrode cable to the front of Stimuplex® HNS 12 (to the middle 4-polar plug).
The plug connector configuration prevents wrong polarity connection. – Leave the circuit open.
• Use the mA function key to set the current range to 5.00 mA – Appears in display.
hns12_stim_techn_16s_gb 26.07.2006 14:47 Uhr Seite 7

8
• Use the ms function key to set the stimulus duration to 0.30 ms – Appears in display.
• Use the Hz function key to set stimulation frequency to 1 Hz – Appears in display.
• Using the control knob, slowly increase the target stimulation current from 0.00 mA to 5.00 mA.
Throughout the entire procedure, warning display must read “Patient current lower than your setting”
and patient current = “0.00 mA”. The LED flashes red in a 1-Hz rhythm and the warning signal is
audible in a 1-Hz rhythm.
• Close the circuit using the 10 kΩtest resistor supplied as an accessory. All warnings (display, LED,
sound) must disappear. The display reads 10 kΩ± - tolerance. If the warnings do not disappear,
briefly connect the electrode cable to the contacts at the ends of the cable in order to rule out
that test resistor is defective.
• Using the digital control knob, slowly reduce the target stimulation current from 5.00 mA to 0.00
mA. Throughout the entire procedure, the warning display must not read “Patient current lower
than your setting”, and the LED must be flashing green in a 1-Hz rhythm (if applicable yellow for
target stimulation current < threshold current if option is activated).
In the event that the nerve stimulator does not behave as described, its use must be discontinued.
The nerve stimulator and the electrode cable must be technically inspected.
Switch off the nerve stimulator so that any configured settings (from the medical team) are avail-
able when the device is switched back on.
hns12_stim_techn_16s_gb 26.07.2006 14:47 Uhr Seite 8

9
3. Instructions for technical safety checks
These tests may be performed by qualified staff only and in accordance with the following test
instructions (Section 6, para. 4 MPBetreibV). An equipment logbook of the technical safety checks
must be kept (see appendix) and filed for the next safety inspection (Section 6, para. 3 MPBetreibV).
The following measuring and testing equipment is required:
Oscilloscope (storage oscillograph) for checking the output signal
Settings: -
Time base = 20 µs/div (500 ms/div) for stimulation frequency measurement
- Resolution = 500 mV, 1 V, 2 V, 10 V/div (full screen)
- Mode = High resolution is recommended for maximum accuracy (HiRes) or
sample
- Trigger = falling slope, e.g. 30 %
Ohmmeter for checking test resistance
Test resistor 10 kΩ+/- 1%
9 V battery alkaline, battery voltage > 7 V (a fresh battery is recommended).
3.1 Visual inspection of Stimuplex® HNS 12 and accessories
See Section 2.1. – Enter results in equipment logbook.
3.2 Functional check of Stimuplex® HNS 12
See Section 2.2. – Enter results in equipment logbook.
3.3 Checking the operating controls and monitoring equipment
• Check instant set keys (keypad)
mA key: Press the mA key repeatedly. In the display, the value is highlighted by a border for approx.
3 seconds. Only a value highlighted by a border can be changed by repeatedly pressing the key.
Adjustable current range settings are 1.00 mA or 5.00 mA.
ms key: Press the ms key repeatedly. In the display, the value is highlighted by a border for approx.
3 seconds (see above). Adjustable settings are 0.10 ms, 0.30 ms, 1.00 ms stimulus duration (0.05 ms
and 0.50 ms, if applicable).
Hz key: Press Hz key repeatedly. In the display, the value is highlighted by a border for approx. 3
seconds (see above).
Adjustable stimulation frequency settings are 1 Hz or 2 Hz.
hns12_stim_techn_16s_gb 26.07.2006 14:47 Uhr Seite 9

10
MMEENNUUand OONN//OOFFFFkkeeyyss:
When the stimulation screen is displayed, press I䊳arrow key ➝Main Menu is displayed.
Use 䊲to select “Setup” menu.
Press 䊳key. “Setup” menu is displayed.
Press 䊴key. Main menu reappears in the display.
Press ON/OFF key briefly. The stimulation screen reappears.
• Check digital control knob
In the stimulation screen turn control knob clockwise; this increases the target stimulation current;
turn knob counter clockwise to reduce target stimulation current.
•LCD display: Readability check. If necessary, increase contrast by selecting Contrast menu.
Using the digital control knob, set target stimulation current = 5.00 mA.
• Check LED display with open circuit – LED lights up red.
• Check LED display with closed circuit – LED lights up green.
• Check Sound with open and closed circuit. If necessary, increase volume by selecting Volume
menu.
Enter results in equipment logbook.
3.4 Checking the accessories
• Measure 10 kΩ± 1 % test resistance with the ohmmeter. Enter results in equipment logbook.
• Check electrode cable as described in Section 2.2. Enter results in equipment logbook.
If available:
• Connect Stimuplex® Remote Control to front of Stimuplex® HNS 12 (3-polar plug on left). The
plug connector configuration prevents any wrong polarity connection.
• Use the remote control buttons to increase target stimulation current and reset to 0.00. Enter
results in equipment logbook.
hns12_stim_techn_16s_gb 26.07.2006 14:47 Uhr Seite 10