We assessed the reproducibility and accuracy of four ratios used to measure patellar height, namely the Blackburne-Peel, Caton-Deschamps, Insall-Salvati and modified Insall-Salvati, before and after total knee arthroplasty. The patellar height was measured, by means of the four ratios, on the pre- and post-operative lateral radiographs of 44 patients (45 knees) who had undergone total knee arth...

Robert Insall was born in London in 1965, into a family of architects, musicians and historians. To their great surprise, he was obviously scientifically inclined from an early age. He did a B.A. at Cambridge University, then stuck around in Cambridge for a Ph.D., where he got interested in Dictyostelium, followed by a postdoc in Johns Hopkins, where he got interested in chemotaxis and cell mov...

The effect of weight-bearing on the height of the patellar using four radiological indices was studied in 25 healthy men using lateral radiographs of the knee in 30 degrees of flexion non-weight-bearing and weight-bearing. The position of the patella was quantified using the Insall-Salvati, the modified Insall-Salvati, the Blackburne-Peel and the Caton indices. The contraction of the quadriceps...

PURPOSE To assess the Insall-Salvati ratio in normal Indian adults to determine its applicability and the incidence of patella alta and baja in Indian populations. METHODS 800 knees in 200 men and 200 women aged 18 to 50 (mean, 30) years were evaluated using lateral radiographs. The knee was set in semi-flexion (30º) to enable good visualisation of the patellar tendon and its insertion into t...

OBJECTIVE To analyze the most common methods for measuring patellar height and the impact of observer experience in correlations with the other observers using digital radiography. METHODS Sixty digital radiographs of the knee in lateral view were analyzed by four observers: a physician in the second year of medical residence in orthopedics (R2); a physician in the third year of medical resid...

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OBJECTIVE To compare the plateau-patella angle method to the methods already established for patellar height measurement in patients undergoing high tibial osteotomy. METHODS This is a retrospective study of 13 patients undergoing medial opening tibial osteotomy. The patellar height was measured in pre and post-operative radiographs by the methods from Insall-Salvati, Caton-Deschamps, Blackbu...

background: abnormal patellar height is associated with anterior knee pain and several conditions that affect the patellofemoral joint. the aim of this study was to 1) report the incidence of patella alta and patella baja and 2) investigate whether the normal limits of the insall-salvati ratio is applicable in adult middle-easterners. methods: a radiographic review of the lateral radiographs of...