SU1181653A1 - Fixative for osteosynthesis of interochanteric area of the thighbone - Google Patents

Abstract

CLAMP FOR OSTEOSYNTHESIS OF THE INTERJECTIVE AREA OF THE FEMORAL BONE, containing a two-bladed nail with a bearing pad and a bony plate with holes, so that, in order to reduce the trauma of a surgical intervention, a two-bladed nail and a layer of a maritime layer, a two-bladed layer, and a layer of a maritime layer, is applied to a two-bladed plate with a hole, and a layer of a dormant layer is applied. moreover, one end of a two-bladed nail is provided with a shank having jagged protrusions, and one end of the outboard plate is made with a serrated groove under the serrated lugs of the shank, while the serrated lugs and serrated grooves are made with the possibility of relative longitudinal movement and fixation according to the principle of a bayonet connection. (L

Description

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(Rig. 1 The invention relates to medical technology, and more specifically to traumatology and orthopedics; the aim of the invention is to reduce the trauma of surgical intervention. Fig. 1 shows a fixture for osteosynthesis of the invertal bone marrow, frontal projections; Fig. 2 - the same, horizontal, is shown in Fig. 3 - section A-A in Fig. 2; on A is an anterior plate of the retainer; in Fig. 5 is section B-B and .-. Fig. 4; in Fig. 6 - bipedal nail, frontal projection; in Fig. 7 - the same, horizontal projection .. The fixative contains a two-blade a nail 1 provided at one end with a support platform 2 with a hole 3 in it for a knocking tool (not shown). On the side of the bearing pad 2 to the two-blade nail 1 there is a rigidly attached shank 4 having serrated projections 5 along its side walls. Transverse The cross section of the shank 4 at the location of the jagged protrusions 5 can be made in the form of a dovetail tail, with an acute angle facing the opposite direction of the supporting platform 2. The cross section of the shank 4 is made rectangular. The retainer also contains an outboard plate 6, at one end of which there is a jagged groove 7 parallel to the axis of the outer plate 6. Moreover, the side walls at the location of the depressions 8 of the toothed groove 7 are perpendicular to the plane of the outer plate 6. The distance between the opposite walls of the toothed groove 7 the location of the depression 8 is greater than the external dimensions in the cross section of the serrated projections 5 of the shank 4, and the length of the depression 8 is greater than the length of one tooth of the axial protrusion 5. Each of the inner side walls of the serrated groove 7 in the month e positioning teeth 9 disposed at an acute angle to the plane of plate of the plate 6, i.e. The cross section of the toothed groove 7 at the location of the teeth 9 has the shape of a dovetail and corresponds to the cross section of the toothed projections 5 of the shank 6. At the end of the outboard plate 6, at the location of the toothed groove 7, there is a stop 10 that can interact with the tooth of the toothed protrusion 5 located close to supporting platform 2. In the overlay plate 6 there are holes for screws 11, one of which is located at the location of the gear groove 7, which is installed with the possibility of coaxial arrangement with hole 12 on the shank 4 at the moment when the toothed protrusion 5 of the shank 4 is located near the supporting platform 2 close to the stop 10. The latch works as follows. First, a longitudinal section of soft tissues is made along the outer surface of the thigh from the base of the greater trochanter along the longitudinal axis of the limb up to the bone with a size corresponding to the size of the outboard plate (BO-90 mm). According to the generally accepted methodology, intertrochanteric osteotomy is performed (operation Mac Merre). The upper end of the distal femur fragment is moved inwards to a distance of at least half the diameter of the diaphysis. Through the end of the central fragment, the two-bladed nail 1 is injected intraoscopy by abutting the knocking tool inserted into the hole 3 of the support pad 2 until the support pad 2 is pressed against the bone. Then the shank 4 is placed in the notched groove 7 of the outboard plate 6 as follows. The outboard plate 6 is placed on the lateral surface of the peripheral fragment of the femur so that the notched groove 7 faces the notched shank 5. By longitudinally moving the outer plate 6, the teeth of the toothed protrusion 5 and the cavity 8 of the toothed groove 7 of the outboard plate 6 are aligned. Put the shank 4 in the toothed groove 7 on the plane of the outboard plate 6, after which the longitudinal movement of the outboard plate 6 in the direction from the shank 4 reaches the abutment of the tooth. The tooth protrusion 5, p Placed close to the support pad 3, the anvil 10. The aperture 12 of the shank 4 and one of the apertures 11 placed in the location of the gear groove 7 are aligned, and the tooth projections 5 of the shank 4 are placed between the plane of the outboard plate 6 and the teeth 9. After that The tailings 4 and the bone plate 6 are fixed to the bone by inserting screws (not shown) through the holes, starting from the holes 12, into the bone. The wound is sutured in layers, tightly,. If it is necessary to remove the retainer, a surgical incision is made, similar to the previous one, so that the bone plate 6, the shank 4 and the supporting platform 2 of the two-bladed nail 1 are separated from the scars. A screw (not shown) from the hole 12 of the shank 4 is inserted into the hole. the support pad 2 is inserted a knocking tool, by means of which a double vane nail 1, a slipper in the groove 7 is pulled out of the bone before the projections 5 are aligned with the valleys 8. Then, the remaining screws (not shown) from the hole 11 and extramedullary plate 6 is removed. After this, the Double Blade Nail 1 is removed completely from the bone. The wound is sutured in layers, tightly. The use of the proposed device allows reducing the invasiveness of surgical interventions, due to the reduction of soft tissue incisions four times to the outer plate, which is caused by the dislocation of the fixer and the sequential introduction during osteosynthesis or removal when removing it in parts (the external plate and the two-blade nail), greatly simplifies the technique of performing a surgical intervention, since osteosynthesis and removal of the fixator are performed in stages, without compromising the achieved interposition sore bone fragments.

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Claims (1)

FIXER FOR OSTEOSYNTHESIS OF THE FEMORAL INTERFEROUS AREA, containing a two-bladed nail with a support pad and a bony plate with holes, which is made in order to reduce the surgical trauma of the surgical intervention, a two-bladed nail and a bonded plate moreover, one end of the two-bladed nail is equipped with a shank having serrated protrusions, and one end of the osseous plate is made with a serrated groove under the serrated protrusions of the shank, while the serrated protrusions and serrated grooves are made They are capable of relative longitudinal · displacement and fixation according to the principle of bayonet coupling. > 1181653 2