title: Predicting femoral head diameter and lesser trochanter to center of femoral head distance: a novel method of templating hip hemiarthroplasty.
abstract: Lesser-trochanter-to-center-of-femoral-head-distance (LTCHD) is commonly used in hip reconstruction. Demographic and radiographic variables were analyzed to predict the LTCHD and femoral head size (FHS). Two hundred twenty six patients after hip arthroplasty and 136 patients after hip hemiarthroplasty (HA) were retrospectively reviewed. Five variables significantly affected the LTCHD and four affected the FHS. For LTCHD, it was relative neck length (RNL), gender, height, race, age and weight. For FHS it was gender, height, age and race. The average predicted LTCHD was within 2.86 mm, and the FHS was 1.63 ± 1.10mm of the intra-operative measurements. By using our regression formulas the LTCHD and FHS can be calculated preoperatively to help improve precision in leg length and offset reconstruction.
authors.affiliation: Department of Orthopaedic Surgery, Center for Hip and Knee Replacement (CHKR), New York-Presbyterian Hospital at Columbia University, New York, New York.
authors.forename: Daniil L
authors.initials: DL
authors.lastname: Polishchuk
authors.forename: David A
authors.initials: DA
authors.lastname: Patrick
authors.forename: Borys V
authors.initials: BV
authors.lastname: Gvozdyev
authors.forename: Jonathan H
authors.initials: JH
authors.lastname: Lee
authors.forename: Jeffrey A
authors.initials: JA
authors.lastname: Geller
authors.forename: William
authors.initials: W
authors.lastname: Macaulay
mesh_terms: D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation / Q000379:methods*; D001837:Body Weights and Measures; D005260:Female; D005269:Femur / Q000000981:diagnostic imaging*; D005270:Femur Head / Q000000981:diagnostic imaging; D062785:Hemiarthroplasty / Q000295:instrumentation / Q000379:methods*; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012189:Retrospective Studies
keywords: demographic; formula; hemiarthroplasty; planning; templating