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Biomechanical hand-functionality measurement system
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Image of FIG. 1.
FIG. 1.

Block diagram representing the data collection, processing, and retrieval.

Image of FIG. 2.
FIG. 2.

Generic cross section of the load cells on the strongback showing the relative positions of the applied forces. Not to scale.

Image of FIG. 3.
FIG. 3.

Handset is held vertically, chest high.

Image of FIG. 4.
FIG. 4.

Field verifier detent in place on the thumb button of the hand set. The verifier can be lifted, rotated 180° and replaced onto the hand set to allow for any offset due to a nonlevel table.

Image of FIG. 5.
FIG. 5.

Signal effects seen by nonloaded cells due to weight loading of the cited cell. Largest effect (0.44% of max load) is seen by the index cell when the thumb cell is loaded. No effect is seen by the thumb and index when the small cell is loaded (bottom graphs).

Image of FIG. 6.
FIG. 6.

SensoKinetoGram evaluation output for subject with known diagnosis of carpal tunnel syndrome. Left hand is tested prior to endoscopic carpal tunnel release surgery. The right hand is three weeks after 2-portal endoscopic carpal tunnel release.


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Table I.

Sensitivity and specificity values for clinical diagnostic methods.

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Table II.

Combinational probabilities.

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Table III.

Sensor calibration results.

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Table IV.

Verifier data in counts.

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Table V.

Observed noise levels at load in counts.

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Table VI.

Normal test scores.

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Table VII.

Repeat measurements.

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Table VIII.

Functionality improvement after carpal tunnel release surgery.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Biomechanical hand-functionality measurement system