Biomedical subjects

P S Kaiker

Publications and source records attributed to P S Kaiker.

3 recordsLinked to original sources

PubMed1987

Two factors critical in the pressure response of the impacted head.

The response of the head to blunt impact in the posterior-to-anterior direction (+Gx) was investigated using anesthetized Macques (Macaca mulatta). Three-dimensional motion and epidural pressures were measured. The data were analyzed in the time domain using time histories and auto- cross-correlation functions; in the frequency domain, transfer functions were used. The results of the tests demonstrate that: 1) the thermodynamic response (fluid vaporization) of the cerebrospinal system is an important consideration when the impact produces significant tension, and 2) the interaction of the neck and the skull affects both the stresses produced in the brain and the injury response. These results are important for both the mathematical modeling of head trauma and establishing the injury tolerance of the head.

Acceleration↗

PubMed1986

Use of quadruped models in thoraco-abdominal biomechanics research.

Pigs and dogs have become common models of human thoraco-abdominal impact response. This paper summarizes a comparative analysis of the dog and pig to the live human accomplished through a series of necropsies performed on pigs and dogs. The results are summarized below. Emphasis is placed on specific aspects which are felt to be important for impact biomechanics. In particular, emphasis is placed upon the effect of tethering structures because of their potential in explaining mechanisms of injury for specific types of trauma such as aortic and certain liver injuries. Some aspects of tethering in the pig and dog are significantly different from that of the live human so care should be taken when using these animals in thoraco-abdominal biomechanics experiments.

Abdomen↗

PubMed1986

Pelvic stress.

Biomechanics testing simulated stress concentrations in the acetabulum resulting from a blow to the right trochanter, as commonly occurs in recreational and passenger contexts. Developing tolerance criteria for the pelvis is addressed in this paper in terms of the load distribution and energy transmission to the pelvis via both soft tissues and the femur, the instability of the femur-pelvis complex, and the difficulty of predicting stress using simple, experimentally derived, parameters.

Biomechanical Phenomena↗