Innovation in Muscle Strength and Fatigue Assessment & Reporting
 Some of our Clients



A FIXED MYOMETRY system normally consists of an electric HIGH/low examination table, an  orthopedic frame, pc or notebook computer with the QMA program, an analog/digital acquisition device, and various input instruments.  The examination table is placed within and surrounded by the orthopedic frame.
An in-line force transducer (load cell) is secured to the frame, and a strap or cable is extended to a cuff.  The cuff is worn by the patient (subject), and the the patient is positioned on the examination table in such a way as to isolate a muscle or muscle group to test.   The test is started, the patient is directed to exert effort, and the resultant data is displayed as a trace (force/time curve).   The analog signal received from the force transducer is digitized by the acquisition converter in the pc and converted to data within a usable file structure.  Over time additional data may be acquired for longitudinal comparative analysis.  Progress of the patient may be fully documented with   reports that are automatically generated from the information you request.

Fixed Myometry testing permits stronger extremities, that may exceed 200 lbf, to be assessed without compromise.  Mechanical compromises of testing may occur when the effort exceeds either the maximum capacity of the instrument, or the effort permits the fixed point (plane of resistance) to be moved.  Another mechanical compromise of testing may occur when the effort is small, and the upper capacity of the instrument large.  The maximum error (accuracy) of the instrument may exceed the effort measured.  It is recommended to utilize instruments (force transducer) that compliment (slightly exceed) the anticipated efforts of the patient.  Instruments are normally ailable in a range from 1.1 lbf to 1000 lbf.

Hand and pinch strength and fatigue, and release Myotonia data may also be assessed and documented.  

Critical criteria for test validity is that the acquisition of the data be accurate and repeatable.   Accuracy of an input instrument may be easily confirmed or improved with "Check & Tweak" - a sub-routine within QMA.  Repeatability or inter-rater reliability may be improved when each member of a study group is trained and utilize the same techniques and methodology when testing a patient.

The following are photos of QMA basic setup, assessing equipment and various tests in process.


      QMA Testing Area Setup     /            Double Click on Photo to Enlarge            WalSlide / Wall Mount Unit


         Testing Elbox Extension                  Testing Elbox Extension Stablized                Testing Elbow Flexion


       Testing Knee Flexion Stabilized                        Testing Ankle Dorsiflexion Stabilized

   The QMA System utilizes a remote switch that permits the testing healthcare professional to remain in contact with the patient, to stabilize the
 patient during testing; moving from test to test as each test is concluded satisfactorily.

   Instruments are available to assess hand grip, pinch (key, tip and palmar, and specialty tests; such as tongue strength, Lip bite and Jaw / Bite Strength 
  for Speech Pathology or the   diagnosis of Bulbar ALS.

   When the visit is finished, a report may be generated that documents the efforts of the patient, compares previous muscles tested in a previous visit, and calculates an expected amount for each muscle - based on age, gender and BMI.

   Click for an example of a  Patient Progress & Evaluation Report.

   Other Input Instruments include:
   1. Hand Held Myometry with integrated Remote Switch
   2. Hand Dynamometer with analog output - Grip Strength
   3. Pinch Dynamometer with analog output - Pinch - Tip, Key, Palmar
   4. IOPI Tongue Strength Appliance - integrated into QMA

      Contact us for additional information - click here !!

  Quantitative Muscle Assessment, "QMA" and LifeForce are trademarks of AEVERL MEDICAL, LLC.
     All other products mentioned are registered trademarks of their respective companies.    
Questions or problems regarding this web site should be directed to
Copyright 2010  AEVERL MEDICAL, LLC  
All rights reserved.    Last modified: Wednesday March 15, 2017













Back to Top
Return to Home 
  Vertical Length - 6 Ft
  Horizontal Unit Over Head
  May attach S hooks to testing
  Instruments for testing

  Primarily utilized with Hand Held
  Myometry, non-ambulatory patients
  or restricted space areas.
WallSlide Fixed Station -
Vertical length - 6 ' with Horizontal unit over head.   May attach S hooks for testing to Sliding Anchors.