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PubMed1978

[Rehabilitation of haemiplegic lower limb amputated patients (author's transl)].

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Aged↗

PubMed1985

Swing phase control with knee friction in juvenile amputees.

Above-knee amputees have a slower than normal walking velocity. In conventional prostheses the solution has been to apply knee friction to attempt to match the cadence of the prosthetic limb to the sound limb. Using kinematic data, we investigated the effect of variable knee friction on the swing phase of gait in juvenile amputees. The subjects were instructed to walk at a comfortable pace and were tested repeatedly with varying amounts of knee friction. We found that the excursion of the prosthetic shank as measured by knee range of motion was altered by changing the amount of knee friction. The period of the prosthetic shank remained constant when measured as a physical pendulum and when measured dynamically during gait. Therefore, knee friction is an effective means of providing the amputee with a more symmetrical appearing gait by matching the heel rise of the prosthetic limb to the sound limb. It is not an effective means, however, of matching the cadence of the prosthetic limb to the sound limb.

Artificial Limbs↗

PubMed2005

Acroangiodermatitis (pseudo-Kaposi sarcoma) associated with verrucous hyperplasia induced by suction-socket lower limb prosthesis.

Increasing use of suction-socket lower limb prostheses has been associated with an increased frequency of dermatological manifestations, linked to the fact that the skin of the amputation stump must adapt to an entirely new environment. In particular, verrucous hyperplasia and rare cases of acroangiodermatitis (pseudo-Kaposi sarcoma) have been described. We report a case of amputation stump dermatitis, clinically resembling verrucous hyperplasia, but with predominant histological aspects of acroangiodermatitis in a patient with a suction-socket lower limb prosthesis.

Acrodermatitis↗

PubMed1982

Angular displacements in the upper body of AK amputees during level walking.

The angular displacements of the longitudinal axis of the trunk, and of the latero-lateral axes of pelvis and shoulder girdle were measured in five normal subjects and four AK amputees during level walking at different speeds. Amputees used single axis prostheses with the SACH foot. Spatial measurements were carried out in three dimensions by means of a photogrammetric technique. The time functions of the target angles underwent harmonic analysis. Based on the Fourier coefficients, comparison was made between normal subjects' and amputees' angular displacements. Relevant findings permitted the identification of compensatory mechanisms adopted by amputees at trunk level as well as the assessment of the relationship between these latter mechanisms and those put into action at lower limb level.

Amputation, Surgical↗

PubMed1981

Training program for a myo-electrically controlled prosthesis with sensory feedback system.

A myo-electrically controlled prosthesis that incorporates a sensory feedback mechanism to provide the wearer with a sense of touch or gripping force in the prosthetic hand was developed for patients with below-elbow amputations. A training protocol was established in which patients were taught to produce myo-electric control signals and to interpret the sensory feedback. The protocol includes functional training in daily living skills. The experiences of four patients trained with these limbs are described.

Activities of Daily Living↗

PubMed1999

Test of a vertical scan mode in 3-D imaging of residual limbs using ultrasound.

We have developed a new ultrasound system for imaging residual limbs that employs two scan modes: a vertical scan mode (VSM) primarily used for capturing the skin surface, and a horizontal compound scan mode (HCSM) primarily used for imaging the internal tissue structures. Since the HCSM was described previously (J Rehabil Res Dev 1997;34(3):269-78), the main purpose of this article is to elucidate the principle of reconstructing the skin surface using the new VSM and to report the accuracy of volumetric measurement based on this reconstruction method. For a residual limb with a length of up to 26 cm, the vertical scan takes about 80 s. The acquired skin surface has a resolution of 144 points per circumference in the transverse direction and a resolution of 28 points per cm in the longitudinal direction. The measurement accuracy of the system is tested using a cylindrical phantom and a custom-made limb model. The diameter of the phantom measured by the ultrasound method is 113.8 +/- 0.23 mm, compared with a value of 113 mm measured by a caliper. For the limb model, cumulative segment volumes measured by the ultrasound method are compared with those measured by the hydrostatic weighing method. The relative errors are <1%. This study demonstrates the feasibility of using ultrasound to perform limb measurement for prosthetic CAD/CAM applications.

Artificial Limbs↗

PubMed1969