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Journal of Foot and Ankle Research

, 10:30

First Online: 17 July 2017Received: 28 March 2017Accepted: 26 June 2017

Abstract

BackgroundThe Footscan® platform system is one of the most commonly used clinical tools for the measurement of the foot pressure. The present study was designed to assess the repeatability of the system and identify the range of loading parameters observed in the normal foot.

MethodsMeasurements were collected from 32 healthy participants, 15 females and 17 males, twice at an interval of 1 week. Peak pressure PP, contact time CT, contact area CA, pressure-time integral PTI, and maximum force MaF were recorded; these parameters were investigated in 10 areas of the foot: medial heel, lateral heel, midfoot, first to fifth metatarsals, hallux, and toes 2–5. The intra-session repeatability was evaluated by calculating the intraclass correlation coefficients ICCs and coefficients of variation CVs across the three repeated trials within the same session. The inter-session repeatability was assessed using the average of the three trials in each session to determine the ICCs and CVs.

ResultsThe ICCs showed moderate to good repeatability for every variable of interest, and the CVs were all <28%. The highest zones of PP were found under the second and third metatarsals, followed by the medial heel. The CT was 68.5–82.8% of the total stance time under the metatarsal heads. CA was highest under the midfoot, PTI was highest under the second metatarsal, and MaF was highest under the medial heel.

ConclusionsFootscan® platform system was found to be repeatable. Thus, it can be used as a valuable tool in the assessment of plantar pressure distribution, and the normal values of the foot loading parameters identified in this study can be employed to provide a reference range for the gait analysis performed by the Footscan® system.

KeywordsFootscan® Plantar pressure Repeatability Intraclass correlation coefficients Coefficients of variation Normal AbbreviationsBMIbody mass index

CAcontact area

CIconfidence intervals

CTcontact time

CVscoefficients of variation

ICCsintraclass correlation coefficients

LHlateral heel

M1first metatarsal

M2second metatarsal

M3third metatarsal

M4fourth metatarsal

M5fifth metatarsal

MFmidfoot

MaFmaximum force

MHmedial heel

PPpeak pressure

PTIpressure-time integral

SDstandard deviation

T1hallux

T2–5toes 2–5

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Autor: Chao Xu - Xin-Xin Wen - Lu-Yu Huang - Lei Shang - Xi-Xia Cheng - Ya-Bo Yan - Wei Lei

Fuente: https://link.springer.com/







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