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Biomedical subjects

V H Frankel

Publications and source records attributed to V H Frankel.

83 records · Page 5Linked to original sources
PubMedDate not supplied

Biomechanics of hyperextension injuries to the cervical spine in football.

The biomechanics of cervical spine hyperextension injuries in football players were assessed by using quasi-static-free body analyses. Three situations, i.e., "cases," corresponding to the loading conditions created by three different helmet designs, were examined with the following assumptions: (1) the helmet rim is cut high enough posteriorly so that it does not impinge upon the posterior cervical spine, (2) the helmet rim impacts at the level of the fourth cervical vertebra, and (3) the posterior rim of the helmet strikes the shoulder pads. The results of the analyses suggest that the most dangerous hyperextension situation is Case 1 which leads to high forces and possibly serious injury to the upper cervical spine. The impact of the posterior rim of the helmet at the fourth cervical vertebra (Case 2) significantly reduces these forces. This finding directly conflicts with the so-called "guillotine" mechanism of injury. The impact of the posterior rim of the helmet on the shoulder pads (Case 3) creates the least hazardous loading conditions.

Athletic Injuries↗
PubMedDate not supplied

Trauma on eight wheels. A study of roller skating injuries in Seattle.

Thirty-five fractures secondary to roller skating accidents from March 15 to October 1, 1979 were treated in the University of Washington-affiliated hospitals. Twenty-eight involved the wrist and elbow. Only three were in skeletally immature individuals. Sixty-three percent of the patients were female with the 20- to 34-year-old age group the most commonly involved. A fall, usually backwards, onto outstretched arms and hands was the most frequent mechanism of injury. A detailed study of the popular outdoor skating area in Seattle, Green Lake, indicated that more than 75% of the injuries occurred on sloped surfaces with otherwise favorable environmental conditions. Most people were either first time skaters or had not skated since childhood. Based on our study, we recommend: (1) skating on level, familiar terrain; (2) learning to skate in a sparsely congested area; (3) skating with experienced partners who can give instructions; and (4) using protective equipment, such as knee and elbow pads and rigid wrist splints.

Adolescent↗
PubMedDate not supplied

Early experience with the Autophor prosthesis using a posterior approach.

Twenty-eight Autophor hip prostheses have been implanted in 25 patients, using primarily a posterior approach. Complications have included two dislocations and two femoral shaft fractures. One dislocation required reoperation. The shaft fractures healed in three months with bone grafting and cerclage wiring. There were no infections and no cases of loosening or component failure. Radiological follow-up including bone scan suggests implant boney stabilization at six months. Our early experience suggests that this implant is quite successful, especially in the young patient and the patient with significant loss of bone stock from protrusio or revision surgery.

Adult↗