Amrex MS322 User Manual
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Amrex MS322 User Manual

Low volt ac muscle stimulator
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MS322
*
Low Volt AC Muscle Stimulator
User's Guide
Amrex
®
electrotherapy equipment
a division of Amrex-Zetron, Inc.
*Federal law (USA) restricts this device to sale by or on the order of a licensed practitioner licensed by the law of the state in which
he practices to use or order the use of this device.

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  • Page 1 ® electrotherapy equipment a division of Amrex-Zetron, Inc. *Federal law (USA) restricts this device to sale by or on the order of a licensed practitioner licensed by the law of the state in which he practices to use or order the use of this device.
  • Page 2 MS322 User's Guide Low Volt AC Muscle Stimulator Revised February 2014 Copyright © Amrex-Zetron, Inc. 1995. All rights reserved. Printed in the United States of America The following are registered or trademarked by Amrex: Amrex ® SynchroSonic ® Flextrode ®...
  • Page 3 The MS322 is designed for the application of low volt ac muscle stimulation. The Amrex MS322 Low Volt AC Muscle Stimulator is a single channel, two pad, low voltage electrical muscle stimulator that produces pulsation, tetanize and surge output.
  • Page 4 Amrex strongly recommends that servicing be referred to the factory. Call toll free (800) 221-9069. Save the original shipping carton and all packing materials to safely return Amrex equipment to the factory for service; repair; annual calibration, electrical and mechanical safety check. All accessories, including the ac line cord, must be included with the returned instrument.
  • Page 5 Important AMREX Intensity Reset Circuit: The Amrex Low Volt AC Muscle Stimulator incorporates a unique safety reset function as part of the intensity control. This is to prevent any sudden or...
  • Page 6 Electrical Muscle Stimulation—Contraindications Contraindicated for patients with cardiac demand pacemakers. Should not be used on cancer patients. Electrical Muscle Stimulation—Warnings Long term effects of chronic electrical stimulation are unknown. Safety has not been established for the use of electrical muscle stimulation during pregnancy.

  • Page 7: Table Of Contents

    Power Section ........................5 Part 3 Low Volt AC Stimulator Modality ..................9 Part 4 MS322 General Operation and Application Procedures ..........13 General Operation ........................13 Application of Electrical Muscle Stimulation ................. 15 Adverse Effects - Shortwave Diathermy Indications ............16 Electrical Muscle Stimulation—Indications ................

  • Page 9: Part 1 Overview

    Part 1 AMREX Overview The layout of the MS322 panel consists of controls, indicator lights, and output jacks. TETANIZE PULSATION SURGE O F F PU LSE / SURGE RA TE INTENSITY TIME IN MINUTES 0 / RESET S L O W...
  • Page 10 Part 1 In the illustration below, dashed lines surround each of the MS322's sections. A brief description of each section follows the illustration, and Parts 2 and 3 of this manual contain detailed descriptions. Power/ Timer TETANIZE PULSATION SURGE O F F...
  • Page 11 Select either pulsation, tetanize, or surge output using the Output Mode control. Regulate the frequency of the pulses, or adjust the duration of the surge, with the Pulse/Surge Rate control. MS322 User's Guide...
  • Page 12 Part 1 MS322 User's Guide...

  • Page 13: Power Section

    Part 2 AMREX Power Section In the illustration below, dashed lines surround the MS322's power section. Power/ Timer TETANIZE PULSATION SURGE O F F PU LSE / SURGE RA TE INTENSITY TIME IN MINUTES 0 / RESET S L O W...
  • Page 14 Part 2 The power section of the MS322 panel is depicted below. Items referenced with circled numbers (1 – 2) are explained on the following page. TETANIZE PULSATION SU R G E PULSE / SURGE RATE INTENSITY TIME IN MINUTES...
  • Page 15 To initiate early shut off, turn the Power/Timer knob counterclockwise to the Off position. The ac power will shut off and a bell will sound. 2. ON INDICATOR LIGHT: Will illuminate when the Power/Timer is activated. MS322 User's Guide...
  • Page 16 Part 2 MS322 User's Guide...

  • Page 17: Low Volt Ac Stimulator Modality

    Part 3 AMREX Low Volt AC Stimulator Modality In the illustration below, dashed lines surround the MS322's low volt ac stimulator section. TETANIZE PULSATION SURGE O FF PU LSE / SURGE RA TE INTENSITY TIME IN MINUTES 0 / RESET...
  • Page 18 Part 3 The low volt ac stimulator section of the MS322 panel is depicted below. Items referenced with circled numbers (3 – 8) are explained on the following page. TETANIZE PULSATION SURGE PULSE / SURGE RATE INTENSITY TIME IN MINUTES...
  • Page 19 When power is restored within ten (10) seconds after being interrupted or turned off, or within ten (10) seconds after the treatment period has been completed and the bell has sounded, the AMREX Reset Circuit will be bypassed and the Reset Intensity indicator light will not illuminate. This will allow the continuation or extension of the patient's treatment period.
  • Page 20 Part 3 MS322 User's Guide...

  • Page 21: Ms322 General Operation And Application Procedures

    MS322 General Operation and Application Procedures General Operation 1. Connect the MS322's ac power cord to the MS322's ac receptacle and plug the "Hospital Grade" connector to a properly grounded 120Vac, 60Hz receptacle. 2. Reduce the Low Volt AC Intensity control to the 0/Reset position enabling the audible "click".
  • Page 22 Timer knob counterclockwise to the Off position. The ac power will shut off and a bell will sound. Reduce the Intensity control to the 0/Reset position enabling the audible "click". Thoroughly clean pad(s) with warm water and dispose of the used cloth cover(s). MS322 User's Guide...

  • Page 23: Application Of Electrical Muscle Stimulation

    Apply a generous amount of Flextrode Conductive Spray to the moistened cloth cover. If the Flextrode Conductive Spray is not desired, apply a generous amount of Amrex Conductance and Coupling Gel to the thoroughly moistened Flextrode cloth cover. A generous amount of Flextrode Conductive Spray or Amrex Conductance and Coupling Gel is required to insure good conductivity.

  • Page 24: Adverse Effects - Shortwave Diathermy Indications

    In all cases, it would be very dangerous to give shortwave diathermy and low volt ac stimulator treatment to a patient simultaneously. Any patient who reports a sudden, unexplainable "surge" in output may be experiencing the effects of shortwave interference. MS322 User's Guide...

  • Page 25: Electrical Muscle Stimulation-Indications

    MS322 General Operation and Application Procedures Electrical Muscle Stimulation—Indications Relaxation of muscle spasms Prevention or retardation of disuse atrophy Increased local blood circulation Muscle reeducation Maintenance of or increase in range of motion Immediate postsurgical stimulation of calf muscles to prevent venous...

  • Page 26: Electrical Muscle Stimulation-Precautions

    The irritation can usually be reduced by use of an alternate conductive medium or alternate electrode placement. Skin irritation and burns beneath the electrodes have been reported with the use of electrical muscle stimulators. MS322 User's Guide...

  • Page 27: Specifications

    Pulse Width ..........200 µs at 50% V maximum Frequency Pulsation Mode ....... 1 to 80 pps Tetanize Mode ........80 pps Surge Mode ..........80 pps Surge Duration (seconds) ....variable from 3.75 on/off to 0.375 on/off MS322 User's Guide...
  • Page 28 To maintain original design specifications, your Amrex stimulator must be calibrated and safety tested on an annual basis. Amrex strongly recommends that servicing be referred to the factory. Call toll free (800) 221-9069.

  • Page 29: Appendix B References

    Springer-Verlag, Berlin, West Germany, 1986. Nyborg, W.L. and M.C. Ziskin, ed. Biological Effects of Ultrasound. Vol. 16 of Clinics in Diagnostic Ultrasound. Churchill Livingstone, New York, 1985. Peat, Malcolm, ed. Current Physical Therapy. B.C. Decher, Inc., Philadelphia, Pennsylvania, 1988. MS322 User's Guide...
  • Page 30 Appendix B MS322 User's Guide...

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