The SS21L twin-axis goniometer is a dual output device that can provide simultaneous measurements around two orthogonal rotational axes (e.g., wrist flexion/extension and radial/ulnar deviations). Goniometers attach to the body using TAPE2 medical adhesive tape. The units have a telescopic endblock that compensates for changes in distance between the two mounting points as the limb moves. The gauge mechanism allows for accurate measurement of polycentric joints. One MP3X/45 channel is required for each output; this twin-axis goniometer will require two MP3X/45 channels to measure both axes simultaneously.
The SS21L and SS20L goniometers measure limb angular movement.
See SS22L and SS23L single output devices to measure axial rotation about a single plane (e.g., forearm pronation/supination).
See SS24L single axis goniometer to measure finger joint movement.
Suggested reading for additional information on goniometry:Legnani G, Zappa B, Casolo F, Adamini R, Magnani PL. A model of an electro-goniometer and its calibration for biomechanical applications. Med Eng Phys. 2000 Dec;22(10):711-22.
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