Journal of Rehabilitation Research & Development (JRRD)

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Volume 50 Number 10, 2013
   Pages 1423 — 1434

Abstract — Vibrotactile evaluation: Osseointegrated versus socket-suspended transfemoral prostheses

Eva Häggström, CPO;1–2* Kerstin Hagberg, PT, PhD;1–2 Björn Rydevik, MD, PhD;2 Rickard Brånemark, MD, PhD2

Departments of 1Prosthetics and Orthotics, and 2Orthopaedics, University of Gothenburg, Sahlgrenska University Hospital, Gothenburg, Sweden

Abstract — This study investigated detection thresholds of vibrometric stimuli in patients with transfemoral amputation supplied with osseointegrated (OI) and socket-suspended prostheses. It included 17 patients tested preoperatively with socket-suspended prostheses and after 2 yr with OI prostheses and a control group (n = 17) using socket-suspended prostheses, evaluated once. Assessments on the prosthetic and intact feet were conducted at six frequencies (8, 16, 32, 64, 125, and 250 Hz). Furthermore, measurements were conducted to investigate how vibrometric signals are transmitted through a test prosthesis. The results showed that the OI group had improved ability to detect vibrations through the prosthesis at 125 Hz (p = 0.01) at follow-up compared with the preoperative measurement. Compared with the control group, the OI group at follow-up had better ability to detect high frequency vibrations through the prosthesis (125 Hz, p = 0.02; 250 Hz, p = 0.03). The vibrometric signal transmitted through the test prosthesis was reduced at 8, 125, and 250 Hz but was amplified at 16, 32, and 64 Hz. Differences between the OI and the control groups were found in the highest frequencies in which the test prosthesis showed reduction of the vibrometric signal. The study provides insight into the mechanisms of vibration transmission between the exterior and bone-anchored as well as socket-suspended amputation prostheses.

Key words: artificial limb, osseointegration, osseoperception, prosthesis, prosthetic foot, prosthetic knee, sensibility test, transfemoral amputation, vibrometric measurement, vibrotactile sensibility.


View HTML  ¦  View PDF  ¦  Contents Vol. 50, No.10
This article and any supplementary material should be cited as follows:
Häggström E, Hagberg K, Rydevik B, Brånemark R. Vibrotactile evaluation: Osseointegrated versus socket-suspended transfemoral prostheses. J Rehabil Res Dev. 2013;50(10):1423–34.
http://dx.doi.org/10.1682/JRRD.2012.08.0135

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