PERCS is a lengthening surgery. Children with spasticity often have shortened muscles because the bones and muscles don’t grow at the same rate. Caitlin has short heel cords. SDR if performed early enough saves children from needing orthopaedic surgery. Caitlin will possibly need PERCS but not yet. The casting and night splints has helped her to get a good range in her heel cords. She should not need any other surgeries. Without SDR she’d have needed a greater number of operations.