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Biomedical subjects

P A Laura

Publications and source records attributed to P A Laura.

14 recordsLinked to original sources
PubMed1990

Dynamic analysis of a simplified bone model during the process of fracture healing.

The dynamic analysis of fracture healing is tackled numerically by means of a bone model which uses the finite element method. The model is of non-uniform cross-sectional area and moment of inertia. Shear and rotatory inertia are taken into account. Considerable variation of the upper natural frequencies is observed as the healing process progresses. The practical implications, as well as present limitations, of the technique are examined.

Algorithms↗
PubMed1988

Dynamic analysis of leaflet stresses and application to heart valve design.

The problem is approached using an approximate and simple variational procedure. A comparison with results obtained by means of the finite element method reveals that the analytical solution is convenient from a practical engineering viewpoint. It is hoped that biomedical researchers and designers will find the present approach useful when dealing with more complex structural dynamic situations.

Heart Valve Prosthesis↗
PubMed1985

Design and use of improved walking aids.

The design of crutches and walking sticks to assist the disabled has not varied much since their original conception, some 5000 years ago. From an engineering viewpoint one must consider crutches and walking sticks as dynamic mechanical systems which alleviate a disability; they may act as supports, help the user to recover from stumbling, or transmit from the arms, the energy required to lift the feet from the ground, an action not provided by artificial ankle joints. We describe some dynamic walking aids recently developed at the Instituto de Mecánica Aplicada, and discuss their design and our experience with their use. They are adjustable in height, shock absorbing and have non-slipping tips. Specially developed aids have been designed for children; they are versatile and their use has been made psychologically attractive.

Biomedical Engineering↗