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Lafayette Hand-Held Dynamometer

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Lafayette Hand-Held Dynamometer is a device for objectively quantifying muscle strength. It records the peak force and time required to achieve a "break" in resistance. The test is performed with the clinician applying force to the limb of a patient. The objective of the test is for the clinician to overcome or break the resistance of the patient. It provides reliable, accurate, and stable muscle strength readings that conform to most manual muscle testing protocols.

What does Lafayette Manual Muscle Tester measure?

  • Peak force
  • Time to reach peak force
  • Total test time
  • Time within selectable ranges
  • Average force

Why to choose Lafayette Dynamometer for Manual Muscle Testing

  • This Handheld dynamometer features a wide range of customizable options for data storage, preset test times, and force thresholds
  • Three (3) easy to change molded plastic stirrups with pads
  • Data storage for up to 150 tests in on-board memory
  • Automatic or manual storage of data
  • Measurement range 0-300 lbs (136.1 kg/1335 N)
  • Selectable test time from 1 – 10 seconds
  • Tone to indicate start, stop, and entering within a range
  • Microprocessor controlled
  • Built-in stored data browsing capability
  • Easy to read graphical LCD display
  • Automatic shutoff after 5 minutes of inactivity
  • Battery indicator on LCD display
  • Interactive menus allowing users to select device options
  • Battery powered: (1) rechargeable lithium-ion battery
  • Designed for high inter and intra instrument reproducibility


Lafayette Hand-Held Dynamometer User Manual



What to buy with Hand Held Dynamometer by Lafayette


How to operate Lafayette Hand-Held Muscle Tester?

  • The Lafayette HHD (Hand-heldDynamometer) is small enough to be held in one hand and easily read.
  • The size and weight of the unit permit the examiner to use the same procedures and break test techniques described in the literature and taught by academic institutions without any modification of technique or positioning.
  • The unit is simply placed between the examiner’s hand and the limb being tested. The examiner’s downward force is transmitted to the limb through the HHD unit.
  • The HHD is designed for one hand operation. It can comfortably fit in the right or left hand, with settings for both dexterities. The hand is placed under the strap and around the body of the HHD. This allows easy access to the TOP buttons with the thumb. All of the other buttons are pressed using the opposite hand.
  • The HHD is activated by pressing the Menu/Select button.
  • Measurements are taken by pressing the padded stirrup against the muscle being tested on the subject.
  • The force and time data are displayed on the LCD screen.
  • To conserve battery life, the HHD will deactivate itself when not in use for five minutes. All data on the main screen at power down is saved and will be shown when the HHD is activated again.


Precautions

  • When performing repeated tests, inconsistent placement of the MMT will adversely affect scores.
  • Extreme temperature, especially heat, may affect the values obtained.
  • The MMT cannot tolerate the stress of being used as a floor scale.
  • Care should be taken not to drop the MMT, as it may affect the calibration.
  • Exceeding the force limit (300lbs/136kg/1335N) may permanently damage and/or invalidate the calibration of the MMT. 
  • Upon initial receipt of MMT, charge for 2 hours.
  • Stirrup should be rotated clockwise on and off to reduce friction on O-ring.
  • This device uses a Lithium-Ion battery as a power source. It is recommended that the battery be charged at least once every six months. Failure to periodically charge the battery may result in battery damage or device malfunction.


Lafayette Hand-Held Dynamometer User Manual



How to clean Muscle Strength Testing Equipment?



  • Hard surfaces can be cleaned with a bleach-free sanitizing wipe. Alcohol wipes may also be used. Cloth or foam surfaces can be cleaned with anti-bacterial soap and water and allowed to air dry.
  • Care must be taken to not allow water to penetrate the enclosure as damage to the circuit may occur. 
  • Disposable sanitary covers are available on the stirrup pad that comes into direct contact with the patient’s skin. 
  • Do not reuse disposable covers.

Lafayette Dynamometer Specifications

Particulars Specifications
Size 3.16" x 5.11" x 1.6" (8.03 cm x 12.98 cm x 4.1 cm)
Range 0 - 300 lbs (136.1kg) (1335 N)
Accuracy ±1% over full scale or ± 0.2lbs
Resolution 0.1lbs (0.1kg) / 0.1 N (0 to 999.9 N) / 1 N(1000 N to 1335 N)
Battery Life 6 hrs powered on, 30 minutes after low battery condition
Charge Time 80% charge => 45 minutes / Full charge => 2 hours
Data Storage Capacity 150 tests
Calibration Points 31 point (Every 10 lbs, 0 to 300)
Preset Test Length 0.5 to 10 seconds, in 0.1 second increments

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