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The validity and reliability of the Klaue device
Carroll P Jones1, Michael J Coughlin, Ramon Pierce-Villadot
1Charlotte, NC, USA.
Foot & Ankle International
|November 29, 2005
Summary
The Klaue device accurately measures first ray mobility, a key factor in forefoot abnormalities. This study confirms its validity and reliability for clinical use.
Area of Science:
- Orthopedics
- Biomechanics
- Podiatry
Background:
- Excessive first ray mobility is linked to forefoot abnormalities, but quantifying it is challenging.
- Manual examinations for first ray motion are unreliable.
- The Klaue device was developed to objectively measure first ray mobility.
Purpose of the Study:
- To evaluate the validity and reliability of the Klaue device for measuring first ray mobility.
Main Methods:
- The study used 16 cadaver specimens with hallux valgus.
- Part I: Compared Klaue device measurements to radiographic measurements of first ray dorsal displacement.
- Part II: Assessed intraobserver and interobserver agreement using the Klaue device on cadaver limbs.
Main Results:
- The Klaue device measurements (mean 7.5 mm) closely matched radiographic measurements (mean 7.4 mm), with no significant difference (p = 0.83).
- The device demonstrated excellent interobserver and intraobserver reliability, with identical mean measurements (10.5 mm) between two clinicians.
Conclusions:
- The Klaue device is a valid and reliable tool for objectively measuring first ray mobility.
- Measurements obtained with the Klaue device show minimal variability among experienced users.