METHOD OF MINIMALLY INVASIVE EXTERNAL FIXATION OF LONG BONES AND EXTERNAL FIXATION DEVICE Russian patent published in 2011 - IPC A61B17/56 A61B17/80 

FIELD: medicine.

SUBSTANCE: invention refers to medicine. It involves a closed reduction of fragments of an injured bone. The injured bone is approached from an incision approximately 3-5 cm long above a distal fragment. A bed is formed for the following introduction of a bone portion of the device. The device is assembled by parallel connection of two opposed longitudinal identical plates - bone and external - movable relatively to each other by a hollow rod through their border holes. The latter have extended lines of threaded tapered holes of the same size. Along the full length, the rod has an external thread which comprises movable fixation elements to fix a position of the plates in the form of conical nuts aligning the rod in the holes of the plates. A distal working end of the rod has a flange in the form of a truncated cone with its greater base directed towards a proximal end of the rod and having the sizes and an external thread provided on an external surface, matched with those of the holes of the plates. The bone plate is introduced into the formed bed. The bone plate is fixed to a distal fragment of the injured bone with a wire inserted through a rod cavity. The assemblage process is finished by coupling the free ends of the plates by a second similar hollow core in their matched holes through a puncture above the proximal fragment. The bone plate is fixed to the proximal fragment of the injured bone by another wire through a cavity of the second rod. Then using the holes of the external and bone plates as a navigation system, the holes are formed of skin punctures up to 1 cm in the injured bone, and the bone plate is screwed therethrough to the fragments of the injured bone. Then the external plate, the rod and the wires are removed. Fixation of the bone plate is finished by screw insertion in the empty holes.

EFFECT: invention reduces blood loss, risk of infectious complications, a number of intraoperative X-ray examinations and X-ray action on the personnel and the patient, reducing thereby length of the surgical intervention.

2 cl, 1 ex, 1 dwg