Journal article

Monitoring of the load regime applied on the osseointegrated fixation of a trans-femoral amputee: A tool for evidence-based practice

Frossard L, Stevenson N, Smeathers J, H??ggstr??m E, Hagberg K, Sullivan J, Ewins D, Gow D, Gray S, Br??nemark R ...see all

Prosthetics and Orthotics International, vol. 32, issue 1 (2008) pp. 68-78

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This study aimed to provide a description of the continuous recording of the true load regime experienced during daily living by the abutment of a trans-femoral amputee fitted with an osseointegrated fixation. The specific objectives: (i) To present an apparatus and a procedure allowing recording of the load regime, and (ii) an example of the raw data and six performance indicators of the usage of the prosthesis obtained with this method. A subject was monitored for a period of 5 hours as he went about his daily activities. The load regime was directly measured and recorded using a commercial transducer and data logger. The overall load profile presented alternative periods of variable length of inactivity (64%) and activity (36%), respectively. The maximum load applied on the mediolateral, anteroposterior and the long axes represented 21%, 21% and 120% of the body weight, respectively. The anteroposterior, mediolateral and long components of the impulse were 395 kN.s, 359 kN.s and 2,323 kN.s, respectively. The amputee generated a total of 2312 gait cycles of the prosthetic leg, giving an approximate overall cadence of 8 stride/min. Preliminary outcomes indicated that the proposed method was an improvement on the current techniques as it provided the true loading and actual usage of the prosthesis during daily living. This study is a stepping stone in the development of future affordable, on-board and user-friendly load recording systems that can be used in evidence-based practice.

Author-supplied keywords

  • Activities of daily living
  • Evidence-based practice
  • Force sensor
  • Lower limb amputation
  • Osseointegration

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  • Laurent Frossard

  • Nathan Stevenson

  • James Smeathers

  • Eva H??ggstr??m

  • Kerstin Hagberg

  • John Sullivan

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