RESUMEN
Eighteen children with 26 idiopathic talipes equinovarus deformities were treated by postermedial release (PR) in the interval between 1975 and 1980 and investigated retrospectively. Evaluations included physical examination, functional evaluation, roentgenographic evaluation, and evaluation of foot track tracing pattern. The average follow-up period was 8.2 years. Thirty percent had had previous tendo Achilles lengthenings and 15% had had previous lengthenings plus posterior capsulotomies. Based on Turco's criteria, the results of PR were graded 38.9% excellent, 26.9% good, 15.6% fair, and 18.6% failure.
Asunto(s)
Pie Equinovaro/cirugía , Tendones/cirugía , Tendón Calcáneo/cirugía , Preescolar , Pie Equinovaro/diagnóstico por imagen , Pie Equinovaro/fisiopatología , Humanos , Lactante , Movimiento , Examen Físico , Radiografía , Estudios RetrospectivosRESUMEN
A multichannel biotelemetry system using pulse-width modulation-frequency modulation (PWM-FM) is described in detail for laboratory construction. Its application in a kinematic gait-analysis system is demonstrated, employing minimally encumbering electrogoniometry and foot-contact switches. The triaxial electrogoniometers sense rotational joint motion, and four foot-switches under the sole of each foot provide information on placement and temporal contact. Signals from the multiple sensors are amplified, encoded by pulse-width modulation, and transmitted at an FM radio frequency of 107 MHz. Received data are decoded and then sampled by a minicomputer for analysis. Results from a comparative study of kinematic gait in five normal subjects and five children with cerebral palsy demonstrate system effectiveness in providing quantitative data and various intrasubject and intersubject gait differences. Factors reviewed in the analysis include swing and stance times; cadence; hip-joint motion in sagittal, coronal, and transverse planes; and sequence of foot placement.