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Biomedical subjects

J W Michael

Publications and source records attributed to J W Michael.

5 recordsLinked to original sources
PubMed1999

Modern prosthetic knee mechanisms.

The plethora of presently available prosthetic knee components can be divided into two groups based on how they are controlled: recent innovations that incorporate an onboard computer and the more familiar purely mechanical devices. These categories then can be subdivided into generic functional classes based on the degree of stance phase stability and swing phase responsiveness offered by each type of knee mechanism. This article summarizes the key advantages and limitations of available prosthetic knee systems and suggests a simple method to match the biomechanical capabilities of specific prosthetic knee components to the individual functional capabilities and goals of the person with an amputated limb.

Amputation, Surgical↗
PubMed1990

Current concepts in above-knee socket design.

To review the fundamental tenets of above-knee socket design proposed by Radcliffe nearly 40 years ago, sockets must be designed to achieve vertical support of body weight, stabilization of the residual skeleton in both the coronal and sagittal planes, accommodation of functioning muscles, voluntary control of the prosthetic knee, individualized design, and an optimum balance of comfort, function, and appearance, both statically and dynamically. Contemporary approaches represent enhancements and refinements toward these ends, but each of these fundamental goals must be satisfied no matter what socket design is selected.

Artificial Limbs↗
PubMed1990

New developments in recreational prostheses and adaptive devices for the amputee.

Regardless of age, conventional prostheses and traditional rehabilitation programs no longer meet the needs and expectations of active amputees. The emphasis on fitness, the availability of stronger and lighter materials, and strong consumer demand have led to plethora of new prosthetic designs by progressive prosthetists and engineers. Prosthetic training techniques now take into account the amputee's recreational and sports needs and desires, using advanced athletic training concepts to achieve superior performance in a wide variety of activities. The surgeon, as a key member of the amputee team, should be aware of these profound changes so that they may contribute his or her skill in surgically crafting an optimally functional residual limb. This will allow the amputee to reach for the maximum in cardiopulmonary fitness while achieving social reintegration after amputation. The combination of skills, concepts, and techniques of the amputation surgeon, prosthetist, and therapist/trainer has led to a unique situation, in which for the first time, amputees are able to successfully compete in sports because of their prostheses, rather than in spite of them.

Amputation, Surgical↗