Ectrodactyly: A rare anomaly of limbs

Nirmala, S V S G; Chilamakuri, Sandeep; Pavuluri, Chaitanya; Nuvvula, Sivakumar; Veluru, Sindhuri

doi:10.4103/2277-8632.153329

Cited by 1 publication

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“…This disorder causes anomalies in the human limbs involving the central rays of the autopod and it is observed as: partial or total absence of the fingers, syndactyly, or finger or toe fusing; often described as "claw-like or lobster claw hand", with greater incidence in the upper limbs compared to the lower ones (Nunes, Jadan, & Bello, 2014), (Jindal et al, 2009). The hand malformation is classified in two basic subtypes: typical form (1 in 90,000) in which the metacarpal bones and phalanges are absent, dividing the hand into ulnar and radial portion (V-shaped defect); and atypical (1 in 150,000) where the metacarpal bones generate a wide fissure (U-shaped defect) (Nirmala, Sandeep, Chaitanya, Nuvvula, & Veluru, 2015), (Bharati et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Kinematic model of bar mechanism for ectrodactyly applications

Caicedo¹,

Valencia²,

Sánchez³

et al. 2022

Acta Sci Technol

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This document describes the design and construction of a mechanical device that allows a subject with ectrodactyly to perform a power grip. For this purpose, the coupled bar mechanism for the emulation of a finger is presented, and a system that allows, from a single movement, to perform a large diameter grip, considering design variables obtained from anthropometric and goniometric measurement techniques. This is complemented by kinematic and static analysis, in which the position and force behaviours required in the design are verified. Then, the final construction scheme is carried out by means of computer-assisted design (CAD) software, in which the position behaviour of the distal phalanx end is obtained and compared with the models obtained in Linkage and Matlab. Finally, the work conclusions are presented.

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Section: Introductionmentioning

confidence: 99%