The Splayometer is the first commercial instrument purpose-built for measuring finger and hand extension and abduction strength, providing objective and repeatable measurements for making confident diagnoses and tracking rehabilitation.
Instruments for measuring grip and pinch strength have been in clinical use for decades. But no commercial tool exists for the opposite motion — the force generated when fingers extend, spread, or open the hand against resistance.
Without an objective instrument, clinicians are forced to rely on manual muscle testing: a subjective, examiner-dependent method that produces only an ordinal grade (0–5). The resulting variability undermines the reliability of serial measurements across sessions and limits the defensibility of clinical documentation.
Read more about the clinical conditions relevant to extension and abduction assessment.
"Although often neglected, finger extension force is of great importance for developing grip strength."
—Brorsson et al. (2008), Technology and Health Care 16(4):283–292
Therapists resist motion with their own hands and assign a grade — introducing variability and limiting detection of subtle changes.
The Splayometer delivers a precise, reproducible numerical force reading in pounds or kilograms — the same standards used for grip and pinch assessment.
Baseline documentation, progress tracking, outcome measurement, and medico-legal reporting — all grounded in quantitative evidence.
The Splayometer measures the tensile force generated when a patient spreads fingers apart, extends a finger away from the thumb, or opens the hand against a resistance band.
More details on the Standard Use Procedures page.
Compare typical measurements against published Reference Values.
The Splayometer combines advanced load cell technology with a rechargeable, battery-powered display module to deliver precise force measurement for clinical assessment.
Have questions about the device? Read our FAQs.