The ischial spine sign: does pelvic tilt and rotation matter?

Kakaty, DK; Fischer, AF; Hosalkar, HS; Siebenrock, KA; Tannast, M (2010). The ischial spine sign: does pelvic tilt and rotation matter? Clinical orthopaedics and related research, 468(3), pp. 769-74. Heidelberg: Springer-Verlag 10.1007/s11999-009-1021-5

Preview

Text 11999_2009_Article_1021.pdf - Published Version Available under License Publisher holds Copyright. Download (391kB) | Preview

Although the ischial spine sign (ISS) has been advocated to detect acetabular retroversion, it is unknown whether the sign is valid on anteroposterior (AP) pelvic radiographs with tilted or rotated pelves. We therefore evaluated reliability of the ISS as a tool for diagnosing acetabular retroversion in the presence of considerable pelvic tilt and/or malrotation. We obtained radiographs of 20 cadaver pelves in 19 different malorientations resulting in 380 pelvis images (760 hips) for evaluation. In addition, 129 clinical radiographs of patients' hips that had varying pelvis orientations were reviewed. We found an overall sensitivity of 81% (90%), specificity of 70% (71%), positive predictive value of 77% (80.7%), and negative predictive value of 75% (85%) in the cadaver (patient) hips. Our data suggest the ISS is a valid tool for diagnosing acetabular retroversion on plain radiographs taken using a standardized technique regardless of the degree of pelvic tilt and rotation.

Interest & Impact

Downloads

367 since deposited on 04 Oct 2013
39 in the past 12 months

Citations

5 Citations in Web of Science ®
6 Citations in Scopus

Search

in Google Scholar™

Services

Actions (login required)

Edit item

Actions (login required)

Edit item