Inventors:
Michael John Warner - Johnstown PA
James Allan Mertz - Bricktown NJ
Assignee:
Cambria Medical Science, Inc. - Johnstown PA
International Classification:
A61B 5103
Abstract:
An anatomic torsion monitor includes an examination table (A) equipped with forcibly extendable pads (54, 56) which are utilized to rotationally displace a patient (P) about the patient's transverse axis. A laser (84), or other such pointer, is disposed on a platform (90) which rests across the abdomen of the patient (P) to measure the rotational displacement. The output of the laser (84) is projected onto a scaled chart (100). Clockwise and counterclockwise rotational displacements of the patient (P) as a function of applied forces are obtained by reading the projection of the laser (84) on the scaled chart (100) as the forces are applied and withdrawn. Plotting the rotational displacement versus force on a Cartesian coordinate system produces a continuous, bounded, four quadrant hysteresis loop (116). The data obtained and the hysteresis loop (116) produced therefrom provide a quantitative measure of the motion quality and the motion quantity of the lower back and is subject to detail analytic and medical application.