RESUMEN
This study presents a technique for gait analysis, developed for the assessment of footfall timing and speed. The system in question consists of a transmitter, a receiver, a conductive walkway and a PC with the appropriate software. The technique was first tested for accuracy and repeatability with known signals, and was validated with a group of 20 healthy male adults (mean age = 34 years, S.D. = 5.5). The results thus obtained were similar to those reported in the literature for corresponding groups. Then, measurements on 10 children suffering from cerebral palsy (spastic hemiplegia) were performed. Gait analysis was carried out just before surgery and one year post-operatively. The results confirm the validity of the technique for measurements on orthopedic patients and its efficiency for functional evaluation of gait improvement after surgery.
Asunto(s)
Marcha , Telemetría/economía , Telemetría/métodos , Adolescente , Adulto , Parálisis Cerebral , Niño , Humanos , Masculino , Factores de TiempoRESUMEN
OBJECTIVE: This study attempts to identify temporal gait parameters, which characterize the pre- and postoperative course of hip monoarthritic patients who undergo cementless hip replacement. BACKGROUND AND METHODS: Twenty-five female hip monoarthritic subjects (mean age 51, SD 5.0) were studied preoperatively; 20 out of them were studied at 1 and 8-10 years after the operation with a 22-m conductive walkway system using telemetry. A gender-matched control group was also studied (mean age 60, SD 2.0). The assessed parameters are the gait cycle duration, the single and double support, the single step duration and the gait speed. RESULTS: The results indicate that improvement in patients' conditions following the operation occurs rapidly during the first postoperative year. Yet the hip has not reached optimal performance 1 year postoperatively; 8-10 years later it seems to have reached its optimal performance and remains in good condition. However, it still is below that of the controls. CONCLUSIONS: Single support duration and speed are crucial in characterizing the functional restitution of patients after hip replacement. RELEVANCE: An orthopaedic surgeon who attempts to quantify the postoperative course of hip monoarthritic patients after cementless hip replacement can focus at those temporal factors, which are typical of the functional restitution after the operation, without losing any valuable information given by other values.
Asunto(s)
Artroplastia de Reemplazo de Cadera/métodos , Artroplastia de Reemplazo de Cadera/rehabilitación , Marcha/fisiología , Osteoartritis de la Cadera/fisiopatología , Osteoartritis de la Cadera/cirugía , Aceleración , Anciano , Análisis de Varianza , Cementos para Huesos , Femenino , Estudios de Seguimiento , Humanos , Persona de Mediana Edad , Periodo Posoperatorio , Cuidados Preoperatorios , Probabilidad , Estudios Prospectivos , Rango del Movimiento Articular/fisiología , Valores de Referencia , Muestreo , Factores de Tiempo , Resultado del TratamientoRESUMEN
An easy-to-use, low cost, portable system is presented. It consists of a transmitter, four electrical sensors, a receiver and a PC with the appropriate software. The system can assess footfall timing, that is the single limb support, double limb support, single step duration values, and the gait cycle duration. This system has been tested for its accuracy with known signals. Then, measurements on a group of twenty (20) healthy adults were performed, with statistically insignificant (p>0.2) results to those reported in the literature. The above prove the system's validity for temporal gait analysis.