Reliability of Digital Compass Goniometer in Knee Joint Range of Motion Measurement
Nammond Yaikwawongs MD*, Noppachart Limpaphayom MD*, Vajara Wilairatana MD*
Affiliation : * Department of Orthopedic, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
Objective : To compare the reliability of range of motion measurement in the knee joint using a digital compass
goniometer combined with inclinometer with standard range of motion measurement from roentgenographic
picture.
Material and Method: Range of flexion and extension of the knee joint in volunteer participants was measured
by the newly developed digital compass goniometer combined with inclinometer (DCG). The results were
compared with range of knee joint motion obtained from standard roentgenographic picture by intraclass
correlation coefficient.
Results : Range of motion of knee joint measured by DCG correlated very well with the data obtained from
standard knee roentgenographic picture. The intraclass correlation coefficient equals 0.973.
Conclusion : The digital compass goniometer was a reliable tool to measure knee joint range of motion in
flexion and extension plane.
Keywords : Arthrometry articular, Instrumentation, Equipment and supplies, Knee joint, Range of motion articular
