Bhatia M M, Patil K M
Department of Applied Mechanics, Indian Institute of Technology, Madras.
J Rehabil Res Dev. 1999 Jul;36(3):264-72.
Pressures on the foot during walking are affected by the weight of the person and the walking velocity. It is also found that both the magnitude and duration of the dynamic foot pressures are important in ulcer formation in the neuropathic feet of persons with Hansen's disease (HD). Therefore, new parameters, Normalized Peak Pressure (NPP) and Pressure Contact Ratio (PCR), are calculated from dynamic foot pressure data in 10 defined areas of the feet of 52 nonimpaired controls and 108 persons with HD with different pathologies, using a long barograph that could accommodate at least two foot prints in one walking cycle. Statistical study of these new parameters, for various classes of HD subjects, shows significantly different mean values in the foot areas and hence could aid the clinician in better diagnosis and therapy planning. The second part of the article deals with on-line calculations and gray scale display of these parameter transforms for all the points on the plantar surfaces of both feet in a way that could help the clinician in quick analysis and better management and care of neuropathic feet.
行走时足部所受压力受人体重量和行走速度影响。研究还发现，动态足部压力的大小和持续时间对于汉森病（HD）患者神经病变足部溃疡的形成至关重要。因此，使用一种在一个行走周期中至少能容纳两个脚印的长条形压力记录器，从52名非受损对照者以及108名患有不同病变的HD患者足部10个特定区域的动态足部压力数据中计算出新参数，即归一化峰值压力（NPP）和压力接触率（PCR）。对这些新参数针对各类HD受试者进行的统计研究表明，足部各区域的平均值存在显著差异，因此有助于临床医生进行更好的诊断和治疗规划。文章的第二部分涉及对双脚足底表面所有点的这些参数变换进行在线计算和灰度显示，这有助于临床医生对神经病变足部进行快速分析以及更好地管理和护理。
