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Published on: September 22, 2020
Is skin pressure a relevant factor for socket assessment in patients with lower limb amputation?
Nawfal Dakhil1, Morgane Evin1, Maxime Llari1
1Aix-Marseille University, IFSTTAR, Laboratoire de Biomécanique Appliquée, Marseille, France.
Background:
Prosthetic rehabilitation improves the overall quality of life of patients, despite discomfort and medical complications. No quantitative assessment of prosthesis-patient interaction is used in routine protocols and prosthesis quality still results from the manufacturer's know-how.
Objective:
Our objective is to investigate whether pressure can be a relevant factor for assessing socket adequacy.
Methods:
A total of 8 transtibial amputee volunteers took part in this experimental study. The protocol included static standing and 2 minutes walking tests while the stump-to-socket interface pressures were measured. Questionnaires on comfort and pain were also conducted.
Results:
During static standing test, maximum pressures were recorded in the proximal region of the leg, with a peak value reaching 121.1 ± 31.6 kPa. During dynamic tests, maximum pressures of 254.1 ± 61.2 kPa were recorded during the loading phase of the step. A significant correlation was found between the pain score and static maximum recorded pressure (r= 0.81).
Conclusions:
The protocol proposed and evaluated in this study is a repeatable, easy-to-set quantified analysis of the patient to socket interaction while standing and walking. This approach is likely to improve feedback for prosthesis manufacturers and consequently the overall design of prostheses.
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