The PollexBox™ is a NEW!!! measurement device with a protractor divided in increments of 2 degrees that allows you to quickly and accurately measure thumb abduction on BOTH right and left hands for ACTIVE & PASSIVE:

• Palmar abduction of the 1st metacarpal.
• Full thumb palmar abduction.

This is the only thumb measurement device with reliability and normative data.

Measurement box stores:

• Laser line light
• Red safety goggles
• Instructions

PollexBox™ Instructions:

Click here to download a printable instruction sheet.

Measurement Recording Forms:

For your convenience, recording forms may be downloaded:

PDF for 8.5 x 11 in. paper

PDF for A4 paper

JPEG for any paper

Normative & Reliability Data

The Department of Plastic and Reconstructive Surgery and the Department of Rehabilitation Medicine at Erasmus University MC in Rotterdam, the Netherlands, developed the Pollexograph® to reliably measure palmar abduction of the thumb. The device, now called PollexBox™, is available from HandLab.

Normative data is available on the patient measurement form. Both normative data and intra-rater reliability data can be found in the published articles below. The following publications on PollexBox™(Pollexograph®) can be downloaded:

1. De Kraker M, Selles RW, Schreuders TA, Hovius SE, Stam HJ. The Pollexograph: a new device for palmar abduction measurements of the thumb. J Hand Ther. 2009 Mar 9.
2. De Kraker M, Selles RW, Schreuders TA, Stam HJ, Hovius SE. Palmar abduction: reliability of 6 measurement methods in healthy adults. J Hand Surg [Am]. 2009 Mar;34(3):523-30.
3. Kraker MD, Selles RW, Molenaar TM, Schreuders TA, Hovius SE, Stam HJ. Palmar Abduction Measurements: Reliability and Introduction of Normative Data in Healthy Children. J Hand Surg Am. 2009 Sep 15. Nov;34(9):1704-1708.