Amrex Z-STIM IF150 Series User manual

*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.
User's Guide
Amrex
®
electrotherapy equipment
a division of Amrex-Zetron, Inc.
Z-STIM™ IF150*
Interferential Stimulator

AMREX®electrotherapy equipment
a division of Amrex-Zetron, Inc.
7034 Jackson Street
Paramount, California 90723
[phone]
Toll Free Customer Service [phone]
Fax [phone]
E-mail [email protected]
Web Site http://www.amrexusa.com
IF150 User's Guide
Interferential 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®
Z-Stim™
Flextrode®

i
Thank you. . .
for selecting the Amrex Z-StimIF150 Interferential Stimulator. We believe that you
will find this instrument to be versatile, dependable and user friendly. The IF150
provides the widely used modality of Quad-Polar True Interferential stimulation.
Your IF150 has been manufactured by a group of dedicated, highly trained
employees who exemplify the sixty year Amrex tradition of manufacturing
therapeutic equipment of the highest quality while supporting you with prompt,
courteous customer service.
Upon receipt of your IF150, verify your accessories against the enclosed check list.
Promptly return the postage paid Registration Card to Amrex. Save the original
shipping carton and all packing materials.
Please carefully review this User’s Guide prior to operating the Amrex Z-Stim IF150
Interferential Stimulator. Should you have questions regarding your new purchase,
or need assistance, telephone Amrex Technical Services [phone].

ii
Limited Warranty
Amrex-Zetron, Inc. (Manufacturer) warrants each instrument it manufactures to be free from
defects in material and workmanship under normal use and service for a period of two (2) years
from the date of purchase. This two year warranty extends only to the original purchaser and
shall not apply to batteries, fuses, accessories or any instrument which has been subjected to
misuse, neglect, accident or abnormal conditions of operation.
The Manufacturer's obligation under this warranty is limited to repairing or replacing, at the
Manufacturer's option, any instrument returned to the factory within two (2) years from the date
of purchase. If the Manufacturer determines that the product fails to conform to this warranty
dueto misuse,alteration orabnormal conditionof operation,including evidencethat nonauthorized
personnel have attempted to repair the device, the instrument will be repaired at customers
expense. This warranty is exclusive and in lieu of all other warranties, expressed or implied,
including but not limited to any other warranty of merchantability or fitness for any particular
purpose. Manufacturer shall not be liable for any special, incidental or consequential damages,
whether in contract, tort or otherwise.
Service and Shipping Information
Amrex Technical Services has a representative to assist you should your equipment require service
or repair. It is necessary to obtain a Return Merchandise Authorization (RMA) number before
returning equipment to the factory for warranty repair. Call our representative toll free (800) 221-
9069. Damage, resulting from repairs made outside the factory, is not covered under the warranty.
To maintain original design specifications, your Amrex IF150 must be calibrated and safety tested
on an annual basis. Amrex strongly recommends that servicing be referred to the factory. Call
toll free [phone].
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 theac linecord, must beincludedwith thereturnedinstrument. The customer
is responsible for all freight charges. The Manufacturer shall assume NO responsibility for damage
in transit.

iii
Contraindications—Warnings—Precautions
THIS INSTRUMENT OPERATES ON 120 VOLTS AC 60 Hz. (unless otherwise indicated on the
unit) AND MUST BE PROPERLY GROUNDED FOR SAFETY. The three wire power cord with
"hospital grade" plug should be connected to a GROUNDEDAC wall receptacle. It is the personal
responsibility and obligation of the user to insure that this instrument is properly connected to
the AC POWER source before use.
Warning–Risk of burns and fire. DO NOT use near conductive
material such as metal bed parts or innerspring mattresses. Renew
electrode cables upon evidence of deterioration. Use of controls,
adjustment,or performanceofprocedures,otherthan those specified
herein, may result in hazardous exposure to electrical energy.
Important
AMREX Intensity Reset Circuit: The Amrex IF150 incorporates a unique safety reset function as
part of the Intensity controls. This is to prevent any sudden or inadvertent stimulation output to
the patient in the event that:
• at power on, the Intensity controls are not rotated counterclockwise enabling
the audible "clicks".
• the treatment period has ended.
• the Reset Functions control is pressed.
• the ac power is interrupted.
TheIntensity Resetindicatorlight willflashand anaudiblesignal willbeemitted fromthe generator.
The Intensity controls must be rotated counterclockwise enabling the audible "clicks ". Select a
treatment time and press the Timer Start control before setting the output for Channel 1 and
Channel 2.
Note: The generator will default to factory settings unless the treatment period has ended
without interruption .
Note: When the treatment period has ended without interruption, all generator settings are
maintained except the treatment time which reverts to the factory default setting of fifteen
minutes.

iv
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.
Adequateprecautions shouldbe takenin thecase ofpersonswith suspectedheart problems.
Adequate precautions should be taken in the case of persons with suspected or diagnosed
epilepsy.
Do not stimulate over the carotid sinus nerves, especially in patients with a known
sensitivity to the carotid sinus reflex.
Severe spasm of the laryngeal and pharyngeal muscles may occur when the electrodes
are positioned over the neck or mouth. The contractions may be strong enough to close
the airway or cause difficulty in breathing.
Electrical muscle stimulators should not be applied transcerebrally.
Electrical muscle stimulators should not be used over swollen, infected or inflamed areas
or skin eruptions.
Caution should be used in the transthoracic application of electrical muscle stimulators in
that the introduction of electrical current into the heart may cause arrhythmias.
Electrical muscle stimulators should be kept out of the reach of children.
Electrical Muscle Stimulation—Precautions
Precautions should be observed:
When there is a tendency to hemorrhage following acute trauma or fracture.
Following recent surgical procedures when muscle contraction may disrupt the healing
process.
Over the menstruating uterus.
Where sensory nerve damage is present by a loss of normal skin sensation.
Some patients may experience skin irritation or hypersensitivity due to the electrical
stimulation or the conductive medium. The irritation can usually be reduced by use of an
alternate conductive medium or alternate electrode placement.
Skinirritation andburns beneaththe electrodeshave beenreportedwiththe useof electrical
muscle stimulators.

v
Table of Contents
Part 1
Overview................................................................................................................................. 1
Part 2
Power/Timer Section ............................................................................................................. 5
Part 3
Quad-Polar Interferential Modality.................................................................................. 9
Part 4
IF150 General Operation and Application Procedures ................................................. 17
General Operation of Quad-Polar Interferential Modality .................................................. 17
Application of Electrical Muscle Stimulation Quad-Polar ................................................... 20
Interferential Burns .................................................................................................................... 21
Adverse Effects - Shortwave Diathermy Interference .......................................................... 22
Electrical Muscle Stimulation—Indications............................................................................ 23
Electrical Muscle Stimulation—Contraindications................................................................ 23
Electrical Muscle Stimulation—Warnings .............................................................................. 23
Electrical Muscle Stimulation—Precautions........................................................................... 24
Appendix A
Specifications ....................................................................................................................... 25
Appendix B
References.............................................................................................................................. 27

vi

The layout of the IF150 panel consists of an analog meter, controls, indicator lights,
digital displays and output jacks.
IF150 User's Guide 1
Overview
Part 1
AMREX

2IF150 User's Guide
Part 1
In the illustration below, dashed lines surround each of the IF150's sections.
A brief description of each section follows the illustration, and Parts 2 and 3
of this manual contain detailed descriptions.

IF150 User's Guide 3
Overview
Power /Timer Section
Use Power/Timer Section to activate the main ac power, set the treatment
duration and activate the timer. When the treatment is complete, the
generator will emit an audible signal and the Intensity Reset indicator light
will flash.
Quad-Polar Interferential Modality Section
Select the beat frequency, set the intensities and monitor the output of the
Quad- Polar Interferential mode with the controls, digital displays and
analog meter.

4IF150 User's Guide
Part 1

Power/Timer Section
IF150 User's Guide 5
In the illustration below, dashed lines surround the IF150's power/timer section.
Part 2
AMREX

6IF150 User's Guide
Part 2
The power/timer section of the IF150 panel is depicted below. Items referenced
with circled numbers (1 – 5) are explained on the following page.

IF150 User's Guide 7
Power/Timer Section
1. POWER CONTROL: Controls the main ac power. When the power is turned
on, an audible signal will be emitted and the generator will default to factory
settings. If the Intensity controls are not rotated counterclockwise enabling the
audible "clicks", the generator will emit a series of audible signals and the
Intensity Reset indicator light will flash. The Intensity controls for Channel 1
and Channel 2 must be rotated counterclockwise enabling the audible "clicks",
which will turn off the Intensity Reset indicator light, Intensity control indicator
lights, and the audible signal. The generator will default to factory settings.
2. TIME INMINUTESCONTROL(downward arrow): Ranges from 99 minutes
to 1 minute. The default setting is 15 minutes. To adjust in one minute
increments, press and release. Time in Minutes setting may be reduced during
the treatment period.
3. TIME IN MINUTES CONTROL (upward arrow): Ranges from 1 minute to
99 minutes. The default setting is 15 minutes. To adjust in one minute
increments, press and release. Time in Minutes setting may be increased during
the treatment period.
4. TIMER START CONTROL: Activates treatment timer when pressed. A
flashing decimal point on the Time display indicates timer countdown.
5. TIME DISPLAY: Digital display of treatment duration. Ranges from 1 to 99
minutes. A flashing decimal point indicates timer countdown in 1 minute
increments.

8IF150 User's Guide
Part 2

IF150User'sGuide 9
In the illustration below, dashed lines surround the IF150's Quad-Polar
Interferential section.
Quad-Polar Interferential Modality
Part 3
AMREX

10 IF150User'sGuide
Part 3
The Quad-Polar Interferential section of the IF150 panel is depicted below. Items
referenced with circled numbers (6 – 10) are explained on the following page.

IF150User'sGuide 11
Quad-Polar Interferential Modality
6. SWEEP MODE AND CONTINUOUS MODE INDICATOR LIGHTS
7. SWEEP CONTINUOUS CONTROL: Selects a Sweep or Continuous mode.
The Sweep mode provides a preset beat frequency range and the Continuous
mode provides a preset beat frequency. The indicator light for the selected
mode will illuminate. The Sweep or Continuous mode can be changed during
the treatment period.
Note: Before changing the Sweep or Continuous mode during the treatment
period, rotate the Intensity control for Channel 1 and Channel 2
counterclockwise enabling the audible "clicks".
8. SELECT CONTROL: Selects a Sweep beat frequency range or a Continuous
beat frequency. The indicator light for the selected beat frequency will
illuminate. The output frequency of Channel 2 is 4000 Hz less the selected
Sweep mode beat frequency range or Continuous mode beat frequency. The
output frequency of Channel 1 is 4000 Hz.
• Sweep Mode – Selects a preset beat frequency range of:
(80-150 Hz) Pain, (1-10 Hz) Edema, (1-150 Hz) Rehab,
0-15 Hz, 10-100 Hz, or 80-120 Hz.
• Continuous Mode – Selects a preset beat frequency of:
1, 10, 30, 80, 130 or 150 Hz.
The Sweep mode beat frequency range or the Continuous mode beat frequency
can be changed during the treatment period.
Note: Before changing the Sweep mode beat frequency range or the
Continuous mode beat frequency during the treatment period, rotate the
Intensity control for Channel 1 and Channel 2 counterclockwise enabling
the audible "clicks".
9. FREQUENCY INDICATOR LIGHT ARRAY: Indicates the selected Sweep
mode beat frequency range or the Continuous mode beat frequency.
10. FREQUENCY DISPLAY: Digital display of the selected Sweep mode beat
frequency range or Continous mode beat frequency. Digital display ranges
from 0 to 150 hertz in one hertz increments.

12 IF150User'sGuide
Part 3
The Quad-Polar Interferential section of the IF150 panel is depicted below. Items
referenced with circled numbers (11 – 18) are explained on the following page.