Correlation of intra-operative hamstring autograft size with pre-operative anthropometric and MRI measurements

Abstract

The purpose of this study was to compare various pre-operative methods of estimating intra-operative hamstring autograft size. A retrospective review was completed on 74 patients who had an anterior cruciate ligament reconstruction performed using a quadruple-looped hamstring autograft from July 2007-April 2015 at a single institution. A positive correlation was observed between intra-operative graft size and pre-operative imaging using two methods of MRI measurements. Correlation existed between hamstring size and patient height and weight, but not age or BMI. Thus, pre-operative MRI and anthropometric measurements can be used to estimate intra-operative hamstring graft size.

Keywords: Anthropometric measurements; Hamstring autograft size; MRI measurements.

Fig. 1

Measurements of the same individual using the Grawe method (A) where the freeform region of interest tool is utilized to measure the semitendinosus and gracilis tendons at the widest portion of the distal femur. The Zakko method (B) uses the region of interest tool to measure the semitendinosus and gracilis tendons where they appear the largest and most circular.