LOINC long common name : PhenX - muscle strength protocol 150301;
LOINC short name : Muscle strength proto;
LOINC description : Hand grip strength is measured with a device called a hand-held dynamometer. The technician
follows a script and asks the participant about hand surgery or pain that may influence
the results. The technician asks the participant to sit in a chair and rest his/her
arm on the table with the elbow on top of a mouse pad and arm held at a right angle.
The technician adjusts the grip size of the dynamometer to the participant's hand
size and explains how the device works. The participant squeezes the dynamometer twice
during practice trials. Now, starting with the right hand the participant is asked
to squeeze as hard as possible. Two trials are attempted with each hand with all results
recorded on a form. Results should be recorded to the nearest 2 kilograms. This protocol
is specific to the Jamar dynamometer. The following dynamometers have also produced
valid and reliable hand grip test results: Takei Grip A dynamometer, Model 68812,
Lafayette Instruments 50//100 and 100 kg / 220lb Hand Grip Dynamometer set, and TKK
digital hand dynamometer (TKK 5101 Grip-D Model). The grip setting on the dynamometer
(adjustment for hand size) should be recorded, especially for repeated (longitudinal)
measurements. The technician should utilize the dynamometer manufacturer's user manual
for proper use and maintenance of the dynamometer and check the calibration of the
device with known weights once a week.;