TITLE:
Function Assessment for Rheumatoid Thumb Deformity
AUTHORS:
Ryo Oda, Daigo Taniguchi, Hiroyoshi Fujiwara, Shogo Toyama, Daisaku Tokunaga, Toshikazu Kubo
KEYWORDS:
Rheumatoid Arthritis, Thumb Deformity, Function Assessment
JOURNAL NAME:
Open Journal of Rheumatology and Autoimmune Diseases,
Vol.5 No.3,
August
28,
2015
ABSTRACT: Objective: Nalebuff’s type I deformity of the rheumatoid thumb, which is the most common thumb deformity with rheumatoid arthritis, can be classified into three stages according to the range of motion of the thumb. However, a functional assessment for each stage has never been undertaken. Methods: The ranges of motion of the thumb metacarpophalangeal and interphalangeal joints were evaluated to determine Nalebuff’s clinical stage, and both the Modified Kapandji Index (MKI) and the simple test for evaluating hand function (STEF) were used to evaluate hand function in 32 rheumatoid arthritis patients with type I deformity. We assessed hand function in each stage, and examined the relationship between the three clinical stages and dysfunction of the hand. Results: The scores for both MKI and STEF were significantly reduced in parallel with advancing stage of thumb deformity. Conclusion: Nalebuff’s staging system is also useful for reflecting the level of thumb function.