The Endo-Exo-Prosthesis - about an intramedullary, osseointegrated, percutaneous attachment for above- and below-knee amputees

Horst - Heinrich Aschoff, MD

Patients with above- or below- knee amputation (AKA/BKA) face many challenges to mobility including difficulty with socket fit and fatigue due to high energy consumption. The aim of the Endo-Exo-Prosthesis (EEP) is to avoid problems at the interface between the sleeve of the socket-prosthesis and the soft tissue coat of the amputation stump which often impedes an inconspicuous and harmonic gait. In 1999 we began using a transcutaneous, press-fit distal femoral intramedullary device whose most distal external aspect serves as a hard point for AKA prosthesis attachment. The bone guided prosthesis enables an advanced gait via osseoperception and leads to a decreased oxygen consumption of the patient.

In Lübeck 51 patients underwent the procedure between 1999 and 2010 (48 AKA, 3 BKA). Their indication for surgery was persistent AKA/BKA prosthesis difficulties with a history of AKA/BKA for trauma, tumor or chronicle infection. The paper presents the patient data regarding the design of the implant, the operative procedure, patient satisfaction, gait analysis and oxygen consumption.

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Last modified: December 22, 2010 14:51:14