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Purpose

To evaluate the effects of rectus femoris intramuscular lengthening, a novel procedure to treat stiff-knee gait in ambulatory patients with cerebral palsy, using preoperative and postoperative 3-dimensional gait analysis.

Methods

This study was a retrospective data review of ambulatory patients with a diagnosis of cerebral palsy who had undergone rectus femoris intramuscular lengthening. The indications for rectus femoris intramuscular lengthening were identical to those of rectus femoris transfer. Patients must have had preoperative and postoperative gait analyses at our institution. Three-dimensional kinematic and kinetic data was collected using a VICON 512 motion measurement system (VICON Motion Systems, Inc, Lake Forest, CA) after standard techniques. A representative trial was selected for analysis both preoperatively and postoperatively. Preoperative to postoperative differences were measured …