Peroneal nerve paralysis: a complication of extensor reconstruction of the knee.

Adequate hemostasis is extremely important in extensor reconstruction of the knee and possibly all knee injury. Hemarthrosis postoperatively contributes to postoperative discomfort and may increase the risk of infection. Hematoma formation is also responsible for neurovascular complications. Peroneal nerve palsies were associated with hematoma formation in this series and probably represented a pressure palsy. Release of the tourniquet with good hemostasis and a pressure dressing prior to cast application will aid in the prevention of hemarthroses and consequent neurovascular complications. Peroneal nerve palsy is probably more common in reconstruction of the extensor mechanism of the knee than has previously been reported.