. The principles and practice of surgery. Dislocation into the ForamenThyroideum. 336 DISLOCATIONS OF THE PATELLA. little to disengage the head of the bone; then rotate the thigh strong-ly inward, adducting it, and carrying the knee to the floor. Thetrochanter is then fixed by the Y (ileo-femoral) ligament and theobturator muscle, which serve as a fulcrum. While these are wound Fig. Reduction of a Thyroid Dislocation—Bigelow. up and shortened by rotation, the descending knee pries the head up-ward and outward to the socket. In this manoeuvre, Dr. Bigelowadds, the action of the ligament m
. The principles and practice of surgery. Dislocation into the ForamenThyroideum. 336 DISLOCATIONS OF THE PATELLA. little to disengage the head of the bone; then rotate the thigh strong-ly inward, adducting it, and carrying the knee to the floor. Thetrochanter is then fixed by the Y (ileo-femoral) ligament and theobturator muscle, which serve as a fulcrum. While these are wound Fig. Reduction of a Thyroid Dislocation—Bigelow. up and shortened by rotation, the descending knee pries the head up-ward and outward to the socket. In this manoeuvre, Dr. Bigelowadds, the action of the ligament may be aided, if necessary, by atowel passed round the head of the femur to draw it upward and out-ward. Kotation outward may be substituted for inward rotation. Dislocations of the Patella. The patella may be dislocated outwards, inwards, upwards, or it maybe dislocated upon its own axis. Dislocation Outwards is the most frequent. Eeduction is ef-fected by laying the patient upon the floor, while the surgeon, liftingthe leg and thigh, places the heel upon his own shoulder, so as to relaxcompletely the quadriceps femoris, and then pushes the patella withhis hand toward its natural position. Inward Dislocation is reduced by the same manoeuvre. Dislocation Upwards can only occur as a consequence of a rwp-ture of the Mgamentum patellar. The treatment of this accident is thesame as f
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