Method for determining the stability of an orthopedic device com

Details Method for determining the stability of an orthopedic device com Method for determining the stability of an orthopedic device com

1984-01-10

1986-03-18

Swiatek, Robert P.

Surgery

Truss

Perineal

128 92A, A61F 504

Patent

active

045761582

ABSTRACT:
The stability of an orthopedic assembly characterized by external fixation means in the form of a fixation bar provided with five assemblies of strain gauges having at least one gauge each, involves the measuring the amount of torsion of the bar by one of the assemblies and measuring of two perpendicular components of the amount of bending of the bar at two points of the bar via the remaining two pairs of assemblies and determining by means of the strain gauges of the amount of torsion and the amount of bending at the level of the clamps which connect the fixation bar to the pins and by the comparison of the determined levels of the torsion and bending with those capable of causing sliding of the clamps, the extent of stability of the orthopedic assembly.

REFERENCES:
J. Biomed. Engng., 1980, vol. 2, Oct., pp. 265-271, Ma et al., "Tibial Lengthening Apparatus with Distractive Force Measurement System".
Acta Orthopedica Belgica, Tome 42, Suppl. 1, 1976, "Method Objective d'Appreciation des Deformations du Complexe os-Implant (In Vivo) Par Telemesure", by Sommelet et al.
Originalarbeiten, Helv. Chir. Acta 41, 455-457, 1974, "In Vivo Messung der Belastungsabhangangigen Knochendehnung", by Brennwald et al.
Quatrieme Symposium de Biomecanique Osseuse, CIBO, 21 Mai 1976, "Problemes Poses par l'utilisation des Jauges de Contraintes (In Vivo)", by R. Bourgois et al.

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