Assessment of severity of clubfoot in walking children by combined multiple tools: A new classification system

Abstract

Introduction: Clubfoot is one of the most common congenital deformities that cause mobility impairment. In developing countries, however, due to lack of appropriate medical care, treatment is either not initiated or incompletely performed. Due to lack of consensus for evaluation of deformities in such patients, there is no standardized treatment protocol yet developed. So, a new evaluation system is devised to assess the deformity in untreated or previously managed conservatively clubfoot of walking children.

Methods: It was a prospective, observational study, conducted from December 2017 to July 2019. Patients from age 1-5 years, with unilateral deformity and previously managed conservatively were included. Patients having atypical clubfoot, syndromic clubfoot, or previously surgically intervened were excluded. Pre-treatment severity was graded with Diméglio score. Anthropometric, Foot Imprinting, Radiographic angles, and Ultrasonographic measurements were taken. Parameters taken were assessed and correlated with gradings of Diméglio score.

Results: 37 patients with mean age of 2.14 ± 0.87 years were included. Diméglio score was 11.57 ± 2.15 with 28 patients in 'severe' category. Talocalcaneal index and Tibiocalcaneal angle were correlating with the equinus whereas Bean shape ratio and Talocalcaneal index were correlating with varus deformity. Derotation of calcaneoforefoot block gradings correlating with Foot bimalleolar angle, Talo-first metatarsal angle, and MMN (medial malleolus to navicular distance) Ratio. FBM (Foot Bimalleolar) Angle, Talo-first metatarsal angle, MMN Ratio, and Medial soft tissue thickness were correlating with forefoot adduction. Following the correlation, a new classification system was devised to assess the severity of deformity at presentation.

Conclusion: It is essential to develop an objective methodology to evaluate the severity of the clubfoot; whether the foot is responding to manipulation and casting; to detect the early signs of recurrences and predict the outcomes. The evaluation system should take into consideration the complex characteristics of the deformity and its three-dimensional aspects.

Keywords: Classification; Clubfoot; Radiography; Ultrasonography; Untreated.