The SS21 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. A TEL100C channel is required for each output; accordingly, this twin-axis goniometer will require two TEL100C channels to measure both axes simultaneously.
The SS21 and SS20 series goniometers measure limb angular movement.
The SS22 and SS23 are single output devices used to measure axial rotation about a single plane (e.g., forearm pronation/supination).
The SS24 is used to measure finger joint movement (single axis goniometer).
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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