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MyoTrac Infiniti

™

User Guide

37

Chapter 4

EMG-STIM on your MYOTRAC IN

FINITI™ Encoder

EMG-Stim Sessions

EMG-Stim sessions are conducted in a Script format only. A script session is a session where the
type, number and duration of steps within the session are pre-defined. A simple example would be
a work/rest script that may contain five interspaced work and rest steps each ten seconds in length.
This would give the script a duration of 100 seconds. The work segment of the stim script will
deliver stimulation at the preset pulse frequency and duration for a predetermined amount of time,
at an intensity that you set. This stimulation will occur either above or below the set threshold after
a predetermined delay time.

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Summary of Contents for MYOTRAC INFINITI

Page 1: ...MYOTRAC INFINITI User Guide ...

Page 2: ...MyoTrac Infiniti User Guide 2 ...

Page 3: ... Ltd 2180 Belgrave Avenue Montreal Quebec Canada H4A 2L8 Product Name MyoTrac Infiniti System Product T9800 Device Name MyoTrac Infiniti Encoder Device SA9800 EC REP EMERGO EUROPE Molenstraat 15 2513 BH The Hague The Netherlands Tel 31 70 345 8570 Fax 31 70 346 7299 ...

Page 4: ...sk of cross infection especially when used on abraded skin unless they are restricted to a single patient or sterilized between patients If sterilizing electrodes employ only gas sterilization Radiated radio frequency electromagnetic fields can cause performance degradation in the MyoScan EMG sensor In the worst case an RF field strength of 22mV M can cause an increase of 1 V in the signal reading...

Page 5: ...for use during pregnancy has not been established Caution should be used for patients with suspected or diagnosed heart problems Caution should be used for patients with suspected or diagnosed epilepsy Caution should be used in the presence of the following 1 When there is a tendency to hemorrhage following acute trauma or fracture 2 Following recent surgical procedures when muscle contraction may...

Page 6: ... of stress urge or mixed urinary incontinence and where the following results may improve urinary control Inhibition of the detruser muscle through reflexive mechanisms Incontinence treatment for assessing EMG activity of the pelvic floor and accessory muscles such as the abdominal or gluteal muscles Powered muscle stimulators should only be used under medical supervision for adjunctive therapy fo...

Page 7: ...ment Surge IEC 61000 4 5 1 kV differential mode 2 kV common mode 1 kV differential mode 2 kV common mode Mains power quality should be that of a typical commercial or hospital environment Voltage dips short interruptions and voltage variations on power supply input lines IEC 61000 4 11 5 UT 95 dip in UT for 0 5 cycle 40 UT 60 dip in UT for 5 cycles 70 UT 30 dip in UT for 25 cycles 5 UT 95 dip in U...

Page 8: ...etres m Field strengths from fixed RF transmitters as deter mined by an electromagnetic site survey a should be less than the compliance level in each frequency range b Interference may occur in the vicinity of equipment marked with the following symbol NOTE 1 At 80 MHz and 800 MHz the higher frequency range applies NOTE 2 These guidelines may not apply in all situations Electromagnetic propagatio...

Page 9: ... maximum output power rating of the transmitter in watts W according to the transmitter manufacturer NOTE 1 At 80 MHz and 800 MHz the separation distance for the higher frequency range applies NOTE 2 These guidelines may not apply in all situations Electromagnetic propagation is affected by absorption and reflection from structures objects and people Guidance and manufacturer s declaration electro...

Page 10: ...ions 30 Chapter 3 32 Stim sessions on your MYOTRAC INFINITI Encoder 32 Open Stim Session 33 Script Stim Sessions 36 Chapter 4 37 EMG STIM on your MYOTRAC INFINITI Encoder 37 Chapter 5 41 Data Management on your MYOTRAC INFINITI Encoder 41 MyoTrac Infiniti Review 42 Chapter 6 43 Display Options on your MYOTRAC INFINITI Encoder 43 Displays 43 Chapter 7 47 Flow on your MYOTRAC INFINITI Encoder 47 Cha...

Page 11: ... the encoder and how it interfaces to the host personal computer PC It walks you through Physical Operation of the encoder EMG Stimulation and EMG STIM sessions Data management Display options After you have become familiar with the key concepts of your new encoder you can use the rest of this guide as a reference for less common tasks and also as a source of information if you have problems opera...

Page 12: ...s of SEMG and STIM in a single device provides a third modality of treatment SEMG STIM with features such as EMG Triggered Stimulation and Alternating EMG and STIM Note EMG triggered STIM is not available for incontinence application A simple first approach has been adopted in the design of the MyoTrac Infiniti to make it as easy and fast as possible to get the clinical results desired from this p...

Page 13: ...nly Webcam 30 frames per second for video purposes only NOTE When using certain more complex screens you must adhere to the Recommended Computer Requirements IBM PC compatible Intel Pentium Celeron family or AMD K6 Athlon Duron family CPU P3 speed 1 8 GHz Desktop or Laptop Windows 2000 XP Professional or Home edition 10 20 gigabytes hard disk space The software needs 2 5 gigabytes to install and r...

Page 14: ...ion through the software Rugged Ergonomic Case easy to hold or attach to the subject and will withstand the rigors of daily use Battery Charging jack for wall connection enables fast built in battery charging Headphone Jack for stereo sound feedback or use the built in speaker Push button On Off switch to prevent accidental switching 2 Channels of Surface EMG and stimulation through the same elect...

Page 15: ...ry compartment cover slides open by pushing up using the notch provided Place four AAA batteries in the slots observing the polarity as illustrated Please note that a diagram of the correct battery polarity is embossed on the inside surface of the compartment Alternatively it is possible to use a rechargeable battery pack Thought Technology Part Number MI1028 This battery pack is plugged into the ...

Page 16: ...vice It indicates the current mode of power and whether the unit is currently charging the batteries Note The rechargeable batteries must be fully charged prior to initial use In order for the batteries to reach full capacity it may be necessary to charge them several times 2 8 after initial use Memory Recorded data can be saved using three methods choose the one which most closely matches your us...

Page 17: ...r handheld unit or if the power has been disconnected for a while you will be guided through a set of welcome screens including calibration time and date setting The calibration aligns the internal circuitry of the encoder with its touch sensitive screen so that when you tap a button on the screen the handheld unit can detect exactly which button is being pressed Note Always use a stylus for tappi...

Page 18: ...that the intensity is set below the maximum for the selected electrode size This is assuming an electrode impedance of 500 or 1k respectively 1 Round Max 69mA 49mA 2 x 2 Square Max 100mA 100mA 3 x 4 Rectangle Max 100mA 100mA St Cloud Vaginal Max 100mA 74mA Femelex Max 100mA Note If an external pre amplifier is connected to the device all stim settings are disabled to protect the circuitry of the a...

Page 19: ...ation on electrode selection for different placements The illustration below shows the division of the body into six areas of treatment Arms and Shoulders Head and Neck Abdominals Back and Buttocks Legs and Hips Incontinence When connecting a sensor or extender cables be sure to properly line up the guiding dot on the top of the plug with the notch in the encoder s input socket Forcing the plug in...

Page 20: ...n the wall plug and you have a grounded outlet 3 pin wall sockets with a working ground plug the ac adapter into the MyoTrac Infiniti and into the grounded outlet to provide a ground for the system If you have no opportunity to ground either the PC or the AC adapter use the following electrode placement tips If the EMG site is located on an extremity or limb be sure to place the REF black colored ...

Page 21: ...f the PC is portable running the MyoTrac Infiniti unit off of the PC s battery via the USB cable with the PC and the MyoTrac s AC adapters both unplugged Recharging using the AC adapter may be necessary when the MyoTrac is not in use ...

Page 22: ... is played This sound is also played to alert the user that the USB cable has been disconnected Once connected to the PC the encoder is available to the BioGraph Infiniti software In other words the MyoTrac Infiniti becomes a slave device and is controlled from the PC When you have selected the screens you wish to record the BioGraph Infiniti software will establish a connection When the connectio...

Page 23: ...Support Thought Support is a help feature that is available in every screen of the MyoTrac Infiniti To access Thought Support tap the question mark in the top left corner of every screen This will present you with screen specific assistance explaining the buttons and their functions Clicking anywhere on the screen when the help is displayed will remove it and return you to the original screen As a...

Page 24: ...t selections It favors Compact Flash Saving over Internal Memory Information on the amount of memory used is also displayed in this menu Power Using the power menu it is possible to view the current power settings including the battery level and charging state Lock The lock feature enables you to lock the user interface limiting the ability to change clinical parameters This gives you the ability ...

Page 25: ...rac Infiniti User Guide 25 Sound The sound setting screens allow you to set up the types of sound feedback that the device provides The three settings that can be modified are Volume Mini Pause and Feedback ...

Page 26: ...level can be controlled Mini Pause Mini pause is used to monitor the behavior of a patient during regular activity hence enabling the reduction of muscle fatigue The Mini Pause button allows the user to set up parameters which will alert the user to relax their muscles during an Open SEMG session Feedback The Feedback button allows you to change the style of sound feedback for each of the two chan...

Page 27: ...the audio feedback Used for muscle control Proportionally Decreasing Below Threshold The lower the EMG signal falls below the set threshold the slower the tone of the audio feedback Used for muscle control Single sound when threshold is crossed above A tone is heard at the moment the EMG signal crosses above the threshold Used for muscle strength Single sound when threshold is crossed below A tone...

Page 28: ...d script sessions and furthermore allows for creation of customized script sessions Features of an SEMG session Sound Options During the free running portion before recording begins of both Open and Script SEMG sessions the sound options can be modified Since the Mini Pause alarm is only activated during an Open session it is only modifiable during that session The other sound options are Volume a...

Page 29: ...raph bar graph or digital display Select Client to record this session for if recording to On Board Memory or Compact Flash Card Press the Record button having verified the signal if session is not being saved then it is just running When the session has been completed tap the Stop button and you will be returned to the main menu ...

Page 30: ...uctions It is possible to save up to five custom SEMG scripts on board the device Scripts specific to the following parts of the body are included in the device Arm and Shoulder Head and Neck Abdominal and Chest Back and Buttocks Hip and Leg Incontinence To start an Script SEMG session Select New Session Script from the main menu Select EMG and a client if you wish to save the data Select a body a...

Page 31: ...d for example statistics are available for the entire collection of work segments If this session is subsequently transferred to the host PC running BioGraph Infiniti then the information corresponding to the script that was used to record the session will also be transmitted even if it was a unique custom script For more information see Chapter 5 ...

Page 32: ...cript Pulse Width The duration of each individual pulse Pulse Rate The rate at which a number of pulses are delivered Intensity The intensity in mA that is delivered by each pulse The maximum available intensity is 100mA determined with an input impedance of 500 The maximum intensity that you could use is determined by the electrode size that you are using and may be less than 100mA Ramp The time ...

Page 33: ...nce Depending on the type of incontinence the pulse rate will vary When setting the current intensity for incontinence it should be noted that the increment step is 0 5mA and stimulation is only possible on one channel Open Stim Session To start an Open Stim session New Open Session from the main menu Select Stim or U Stim for treatment of incontinence Confirm Settings to be used during this sessi...

Page 34: ... Up Down Time is the amount of time it takes the stimulation to ramp up to full intensity at the beginning of the work period and to ramp down at the end of the work period respectively The pulse rate is the frequency of the individual pulses that go to make up the total stimulation The pulse width is the duration of each of these individual pulses To make changes to any of these settings press th...

Page 35: ...ods but not the ramp times The maximum current set for the work period is displayed for each channel in the diagram in the middle of the screen The actual supplied current is shown as the larger numbers at the top of the control arrows This supplied current reading will display the max mA during work 0mA during rest and an increasing and deceasing value during the ramps If you keep your finger on ...

Page 36: ... applicable to that body area Alternatively use the Custom Wizard to define your own script following the on screen instructions It is possible to save up to five custom Stim scripts on board the device Please consult the clinical guide for further information To start a Script Stim session Select New Session Script from the main menu Select Stim Select a body area from the illustration to be pres...

Page 37: ...e defined A simple example would be a work rest script that may contain five interspaced work and rest steps each ten seconds in length This would give the script a duration of 100 seconds The work segment of the stim script will deliver stimulation at the preset pulse frequency and duration for a predetermined amount of time at an intensity that you set This stimulation will occur either above or...

Page 38: ...reshold it can be referred to as reward mode When the target threshold has been reached an electrical impulse is delivered to the patient in order to complete the contraction This mode motivates the patient and involves them in the rehabilitation process When the trigger is set to activate below threshold it can be referred to as assistance mode When the patient is unable to hold the contraction f...

Page 39: ...ternating EMG Stim sessions automatic threshold mode is used to determine the value of the threshold This works in the same was as for script SEMG sessions Auto threshold mode allows for the system as opposed to the clinician to determine the threshold value This means that during the first 3 activities of a session i e work or fast flick the threshold that the patient is able to reach is automati...

Page 40: ... the custom design Wizard covered later in the chapter Threshold Setting Confirm or change the threshold that will be used to determine if the stimulation should be triggered Set Stim Intensity The intensity that is set here will be delivered if the correct criteria are met in the recording phase Use the up and down arrows to set the intensity When this is set move forward to the recording screen ...

Page 41: ...t to its internal memory full sessions to the Compact Flash Card or full sessions via live acquisition directly transmitted to the host PC via the USB cable This leads to a need to centralize data for long term storage archiving and further analysis The host PC handles this central storage Data saved on the MyoTrac Infiniti Compact Flash Card can be transferred to the PC When this data is download...

Page 42: ...n gives you information on when the session was recorded and for which client As you can see in the illustration below there are three choices Replay When selecting to replay a session it gives you further information on the recorded Script and asks if you wish to replay it in the same screen type or change between the line graph and bar graph This feature is only available if the session was save...

Page 43: ...e signal is required It is the most comprehensive of the display choices showing in real time up to two signals on a single set of axis Some of the key features of the line graph are the thresholds gain and sweep controls Bar Graph The bar graph display is designed to give a clear indication of the relative levels of each channel It can also be used in ratio mode to give information on the interpl...

Page 44: ...menu The first button on the sub menu is used to select a threshold for Channel A or B With either A or B selected use the and buttons to move the position of the threshold up or down on the range The button below depicts an eye either open or closed This is used to show or hide the selected threshold Line Display This button enables you to select whether Channel A should be filled or unfilled Her...

Page 45: ...button changes focus from the top of the gain to the bottom number for the gain Then use the and buttons to increase or decrease the gain Threshold Set one threshold per channel and move it up and down the scale Tapping the threshold button displays a sub menu enabling you to choose bar graph A or B to adjust and hide reveal the thresholds Bar Displays This button changes the bars displayed in the...

Page 46: ...uring refresh period Mean value of signal during refresh period above is the percentage of time the signal was above the threshold during the refresh period vs T T being threshold value is comparing the signal against the threshold as if the threshold is 100 in real time Zero Xing Abbreviated from Zero Crossings is the number of times the raw signal crosses from a negative value to a positive valu...

Page 47: ...MyoTrac Infiniti User Guide 47 Chapter 7 Flow on your MYOTRAC INFINITI Encoder New Open Session ...

Page 48: ...F Compact Flash T Template A Channel A B Channel B REC Record ve Negative ve Positive Scripts Session A Script is a sequence of events in a pre determined session duration Open Session An open session is defined on the fly by the clinician Its length is governed by the Record and Stop buttons Zero X ing Zero Crossings Then number of times the raw signal crosses from positive to negative or the rev...

Page 49: ...address Provide a detailed description of the problem you are experiencing and your telephone fax number and email see form on the last page of this manual In the USA ship insured to Thought Technology Ltd Cimetra LLC 8396 State Route 9 West Chazy New York 12992 USA In Canada and all other countries contact your dealer or ship insured to Thought Technology Ltd 2180 Belgrave Avenue Montreal Quebec ...

Page 50: ...HREE PACK SA5000 14 AQUASENSE SMALL ARM PROTECTOR SA5000 16 AQUASENSE MEDIUM ARM PROTECTOR SA5000 18 AQUASENSE LARGE ARM PROTECTOR SA5010 14 AQUASENSE SMALL LEG PROTECTOR SA5010 16 AQUASENSE MEDIUM LEG PROTECTOR SA5010 18 AQUASENSE LARGE LEG PROTECTOR SA7713 USB CABLE 1 8M SA9801 Sensor DIN Adaptor Cable SA9804 06 11 STIMULATION ELECTRODES SA9810 MYOTRAC INFINITI USER GUIDE T3402M TRIODE DISPOSABL...

Page 51: ...MyoTrac Infiniti User Guide 51 10 20 PASTE Placing Orders Outside USA Tel 514 489 8251 Fax 514 489 8255 In USA Toll Free Tel 1 800 361 3651 E Mail mail thoughttechnology com ...

Page 52: ...m 4 x 6 x 2 Weight approx 330 g 11oz with Batteries Power Source 4AAA batteries single use alkaline or Rechargeable battery pack 6V Medical Grade AC wall adaptor 5V USB Battery Life Alkaline cells 1200mAh 3 4h typical Battery Life Battery Pack 700mAh 3 4h typical Low battery warning Before shut down ADC output 14bits Encoder sample rate 2048 samples second nominal Encoder channel bandwidth 3dB Int...

Page 53: ... its sensors are sensitive electronic instruments and should be handled as such Be especially careful to avoid both pulling on the electrode cable and getting moisture or electrode gel on the sensor snaps If necessary wipe the surface with a damp cloth or use a moistened Q tip to remove gel from inside the sensor snaps Wipe with a dry cloth ...

Page 54: ...od Thought Technology will not be responsible for items not received We will repair or replace your unit s free of charge This warranty does not apply to damage incurred through accident alteration or abuse nor to sensor damage created by static electricity or to screen damage resulting from misuse Do not use this equipment in dry static area unless using an anti static mat or anti static spray on...

Page 55: ...tion before returning any equipment Remove or copy this form and include it with the unit s Include copy of original invoice and return to the address in the Returning Equipment section Name Company Address Phone No Fax No Date Purchased From Whom Model Name Serial Number Problem ...

Page 56: ...ormation and intellectual property contained herein is confidential between Thought Technology Ltd and the client and remains the exclusive property of Thought Technology Ltd If you find any problems in the documentation please report them to us in writing Thought Technology Ltd does not warrant that this document is error free No part of this publication may be reproduced stored in a retrieval sy...

Page 57: ...MyoTrac Infiniti User Guide 57 ...

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