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Neuro Technology, Inc.

Instruction Manual for DigiStim III Peripheral Nerve Stimulator

Part Number: 8-1002-10

TABLE OF CONTENTS

1. INTRODUCTION

2. SETUP

3. FAMILIARIZATION WITH CONTROLS

4. INDICATORS

5. OUTPUT JACKS

6. BATTERY REPLACEMENT

7. APPLICATION NOTES

8. SPECIAL CONSIDERATIONS AND CONTRAINDICATIONS

9. SPECIFICATIONS

1.0 INTRODUCTION

This manual is provided to aid the Anesthesiologists/CRNA in the operation of a Peripheral Nerve Stimulator

(PNS).

1.1 The DIGISTIM III Peripheral Nerve Stimulator is a constant voltage stimulator for monitoring neuromuscular

block and evaluating muscle relaxant dosage during surgery and recovery. The instrument can also be used as an aid

in accurately locating nerves when performing nerve block procedures. A digital display provides an accurate

readout of the current delivered to the patient.

2.0 SETUP

2.1 Location of the instrument should be within six to twelve feet of the patient (depending on leadwire length) and

approximately five feet above the floor to provide easy viewing of the touch switches and indicators. The stimulator

may be placed on an instrument shelf or attached to an IV pole or anesthesia machine using an optional mounting

bracket.

2.2 The leadwires should be attached to the instrument while the numbered control knob is in the OFF position. See

Section 7.1 for instructions on the use of gelled electrodes.

3.0 FAMILIARIZATION WITH CONTROLS

Power is applied to the instrument by rotating the control knob located on the left side of the case in a clockwise

direction until an audible click is heard. When the unit is first turned ON, a random number will appear on the digital

display. The instrument is now in the standby mode and no pulses will be generated. When stimulus pulses are

generated, the digital display will indicate the amplitude of the current in milliamperes (mA). The numbered control

knob is used to adjust the amplitude of the output current. The numbers on the knob serve as a convenient reference

for remembering the approximate settings of the output amplitude.

3.1 The eight membrane touch-switches (buttons) located on the front panel provide a convenient means of

controlling the functions of the instrument. They are operated by using a finger to depress the desired function

designated under each of the eight buttons. Each time a pulse is generated, the Pulse LED will flash and an audible

click will be heard.

3.2 The STANDBY button puts the instrument in standby mode in which no stimulus pulses are generated.

3.3 The TEN SEC button when depressed will generate one pulse every 10 seconds continuously. The 10 second

pulses can be stopped by depressing the STANDBY button or selecting another function.

3.4 The ONE SEC button when depressed will generate one pulse every second continuously. The 1 second pulses

can be stopped by depressing the STANDBY button or selecting another function.

3.5 The TWO HZ button, which is used primarily for nerve location, will cause a pulse to be generated at ½ second

intervals continuously. The 2 Hz pulses can be stopped by depressing the STANDBY button or selecting another

function.

3.6 The 100 HZ TETANUS button is momentary and will deliver 100 pulses per second as long as the button is

depressed.

3.7 The 50 HZ TETANUS button is momentary and will deliver 50 pulses per second as long as the button is

depressed.

3.8 The TOF (Train-Of-Four) button when depressed will automatically generate four pulses in a period of two

seconds. The train-of-four pulses will be repeated every ten seconds until the STANDBY button is depressed or

Summary of content (5 pages)

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Neuro Technology, Inc. Instruction Manual for DigiStim III Peripheral Nerve Stimulator Part Number: 8-1002-10 TABLE OF CONTENTS 1. INTRODUCTION 2. SETUP 3. FAMILIARIZATION WITH CONTROLS 4. INDICATORS 5. OUTPUT JACKS 6. BATTERY REPLACEMENT 7. APPLICATION NOTES 8. SPECIAL CONSIDERATIONS AND CONTRAINDICATIONS 9. SPECIFICATIONS 1.0 INTRODUCTION This manual is provided to aid the Anesthesiologists/CRNA in the operation of a Peripheral Nerve Stimulator (PNS). 1.
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another function is selected. The train-of-four pulses can be repeated as often as one wishes without waiting for ten seconds. Immediately after the train-of-four pulses, depress the STANDBY button and then the TOF button again. This cycle can be repeated as often as needed. 3.9 The BATTERY button when depressed will display the voltage of the battery on the digital display. This enables the user to check the condition of the battery before using the instrument.
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7.2 BASELINE ADJUSTMENT Before any muscle relaxant is administered, the instrument should be adjusted to provide Supramaximal Stimulation (SMS). SMS is defined as the level at which additional stimulation current does not increase twitch response. This setting can be approximated by adjusting the control knob to the level where any further increase in stimulus current would not increase the level of the twitch response.
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muscles. Following local anesthetic infiltration of the skin, the needle should be inserted in the normal manner for the particular block being performed. Begin advancing the needle, and if necessary, readjust the current to within the 2 to 3 mA range. Continue advancing the needle until a motor response is obtained. Reduce the current until the motor response is barely perceptible and then advance or withdraw the needle to maximize the response.
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Pulse LED: Flashes RED each time a pulse is generated. Stimulus Pulse: An audible click will be heard each time a stimulus pulse is generated. 9.5 POWER: One nine volt alkaline battery. 9.6 POWER CONSUMPTION: Approximately 7.6 mA 9.7 CASE: High impact ABS plastic 9.8 SIZE: 2.09”H x 3.60”W x 5.75”D 9.9 WEIGHT: 11 oz. Including battery. 10.0 STERILITY: Non-Sterile 11.0 SERVICE LIFE: The service life of this device is 3 years from date of purchase. Limited Warranty Neuro Technology, Inc.