title: Comparative study between patellar-tendon-bearing and pressure cast prosthetic sockets.
abstract: This study compared the pressure distribution at the residual limb and socket interface in amputees wearing a pressure cast (PCast) socket system with amputees wearing the patellar-tendon-bearing (PTB) socket. The PCast system requires the subject to place his or her residual limb in a pressure chamber. Pressure is applied to the residual limb while the subject adopts a normal standing position. Four unilateral male amputees were fitted with both PTB and PCast sockets. Using a specially built strain-gauge-type pressure transducer, we recorded residual limb and socket pressure profiles for each subject wearing the two types of sockets during standing and walking. While some subjects exhibited similar anterior-posterior or medial-lateral pressure profiles for both prostheses, especially during push-off, other subjects exhibited high pressure distally in the PCast socket or higher-pressure concentration at the proximal region in the PTB socket.
authors.affiliation: Department of Orthopaedic Surgery, National University of Singapore, 5 Lower Kent Ridge Road, Singapore 119074, Singapore. dosgohj@nus.edu.sg
authors.forename: James Cho Hong
authors.initials: JC
authors.lastname: Goh
authors.forename: Peter Vee Sin
authors.initials: PV
authors.lastname: Lee
authors.forename: Sook Yee
authors.initials: SY
authors.lastname: Chong
mesh_terms: D000328:Adult; D000671:Amputation, Surgical / Q000534:rehabilitation*; D000672:Amputation Stumps / Q000503:physiopathology*; D001186:Artificial Limbs; D006801:Humans; D007866:Leg; D008297:Male; D008875:Middle Aged; D017060:Patient Satisfaction; D011187:Posture / Q000502:physiology; D011474:Prosthesis Design; D016138:Walking / Q000502:physiology; D016474:Weight-Bearing / Q000502:physiology*