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ORIGINAL ARTICLE
Year : 2020  |  Volume : 9  |  Issue : 4  |  Page : 332-336

Designing and evaluation of new dynamic prosthetic foot on transtibial amputees in a low resource setup


1 Department of Multiple Disabilities and Rehabilitation, Faculty of Special Education, DSMNR University, Lucknow, Uttar Pradesh, India
2 Department of Prosthetics and Orthotics, ISIC-Institute of Rehabilitation Sciences, New Delhi, India

Correspondence Address:
Mr. Achintya Prakash
Room No. 108, A2 Block, DSMNR University, Mohaan Road, Lucknow - 226 017, Uttar Pradesh
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijhas.IJHAS_41_20

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BACKGROUND: Foot as an essential part in lower extremity, serves for variety of purposes in daily life. Complex anatomy and biomechanics of normal foot makes its prosthetic replacement quite challenging. Technological boom in prosthetic industries has somehow improved the performance of prosthetic foot but also hike the cost, resulting in limited accessibility to majority of prosthetic user. In this study, we have designed a new dynamic prosthetic foot at low cost and compare its efficacy from the traditional solid-ankle, cushion-heel (SACH) foot. MATERIALS AND METHODS: The current prototype presented is a dynamic foot design consisting of commercially available thermoplastic materials that resembles a hybrid model with true ankle articulation and a flexible keel in order to mimic motion in all cardinal planes. A posttest experimental study has been conducted with fifteen individuals selected purposively. The gait parameters with current prototype and SACH foot were analyzed in conventional way by using 10 meter walk test and energy cost was estimated by calculating physiological cost index (PCI). The correlation between gait variables and PCI were analyzed through a paired t-test. RESULTS: Data analysis shows significant differences in the gait characteristics as stride length (P = 0.000), cadence (P = 0.001), velocity (P = 0.000), and PCI (P value 0.001), comparing the SACH foot and current foot prototype. CONCLUSION: The study outcome reveals the advantage of current prototype over conventional SACH foot in terms of gait characteristic and energy cost at self-selected walking speed.


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