Improvements in surgical apparatus

Abstract

Abstract 634,460. Bone setting appliances. EIJKMAN, A. J. Oct. 18, 1947, No. 27941. [Class 81(ii)] A device for determining the correct direction for drilling the neck of the femur in a case of fracture comprises a guiding tube and a positioning rod at right angles to each other, the latter being adjustable in the common plane passing through the former. In one form the guide tube 3 is secured perpendicularly to a hollow guide member 1 holding one limb 13 of a square 12, while the other limb 15 carries an adjustable slide 16 to which is attached a chuck 20 holding a positioning rod 18. Using a locating pin the guide tube 3 is placed against, or screwed slightly, into the bone at the point of penetration, and the square 12 and slide 16 are set up so that the rod 18 bears against a point directly over the centre of the head of the femur, as determined radiographically. The device is levelled, using a spirit level 21, and the wire 10 is drilled in a distance determined by the setting of the slide 16 on the arm 15. The bone around the point of penetration is recessed by a milling cutter, passed over the guide wire 10, and finally a ribbed pin of known type is driven in over the wire. In cases where the neck of the femur does not lie horizontally, an attachment, see Fig. 4 (not shown) is fitted over the arm 15 and provides a spirit level the inclination of which to the arm 15 may be set to any desired angle. In a modified form of the apparatus the limbs of the square 12 are replaced by two individual arms, the upper one of which is longitudinally adjustable across the top of the other and at one end has a guide in which the rod 18 is longitudinally adjustable. The whole device may be supported by a ball 8 held in a clamp mounted on the operating table. Specification 482,268 is referred to.

Inventors

No inventors recorded.

Bibliographic Details