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Femoral Head Prostheses Include Strain Gauges

JAMA. 1966;195(7):38. doi:10.1001/jama.1966.03100070022009.
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Femoral head prostheses accompanied by tiny strain gauges have been successfully implanted in two patients for biomechanical studies of hip pain, a Swedish investigator reports.

The intramedullary prostheses have allowed Carl Hirsch, MD, and colleagues to record the direction and size of forces exerted on the femoral head. They also continue to serve the patients well, two years after surgery.

Dr. Hirsch, head of the Department of Orthopaedics, University of Gothenburg, recently delivered the biennial Arthur Steindler Award Lecture at a combined program of the Orthopaedic Research Society and the American Academy of Orthopaedic Surgeons.

More than 700 persons crowded the red and gold-lacquered hall of a Chicago convention hotel to hear the Swedish clinician describe current progress against a question that puzzled Steindler, his former mentor, and everyone else:

What forces produce hip pain, particularly in osteoarthritis?

To date, investigators have largely used autopsy specimens for experimental studies. This


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