CN2281160Y - External fixer for holding needles in multi-direction on single side - Google Patents

Abstract

The utility model belongs to the clinical appliance for the wound in the orthopaedics, mainly comprising a hollow shaft whose one end is provided with a regulating nut, an axial power mechanism composed of a screw thread connecting rod, a frame supporting meter composed of two U-shaped racks, a direction regulating block and a needle holding bolt. The two U-shaped racks are respectively connected with the hollow shaft and the screw thread connecting rod, the direction regulating block is connected with the two inner sides of the two U-shaped racks, and the needle holding bolt is connected with a bar-shaped hole groove of the direction regulating block and can move fore-and-aft and rotate freely. The utility model has the efficacy of penetrating the needle from a plurality of directions, and has the functions of axial compression and opening, and the structural design of the utility model can adapt to the angle change of a plurality of steel needles and the spacing change between steel needles.

Description

The one-sided multidirectional pin external fixer of holding

This utility model belongs to the orthopaedic trauma clinical device, mainly proposes a kind of one-sided multidirectional pin external fixer of holding.

Utilize external fixer treatment limb fracture, be acknowledged as a kind of effective method for treatment at present, it is to utilize biomechanical principle to reach bone stump to reset and purpose fixing and promotion knitting and functional rehabilitation.The bone external fixer is the machinery mount structure, it is by being connected with bone photo with many draw points in percutaneous penetrates bone, constitute a new spatial stability system, and by pressurization or drawing-off between mechanism's effect row bone stump of external fixer, the purpose that reaches fixing fracture or prolong limbs, the major advantage of bone external fixer is to be easy to loading and unloading, blood to bone and surrounding tissue thereof is little for disturbing, can take into account the needs of fracture fixation and treatment of wounds, and fixedly rigidity can be adjusted, the activity of the last hypozygal of permission fracture and exercise etc.Be used for the treatment of the external fixation of fracture frame at present one-sided, bilateral, annular, various ways such as semi-circular are arranged.

Axial external fixation has its unique distinction, simple in structure, easy to operate, volume is little, in light weight, particularly be little to tissue injury, can not damage the nervus vasculairs (because its inserting needle terminates in the cortical bone of offside) of offside, but on the mechanics angle, the fixedly rigidity of axial external fixation is stable not as good as bilateral or annular etc.

The purpose that the utility model proposes mainly is to make full use of on the distinct advantages basis of axial external fixation, by the angle of conversion draw point and the position of connecting rod, make it to realize that real nonparallel inserting needle is to fixation of fractures, improve fixed stability, thereby overcome the relatively poor shortcoming of one-sided fixedly rigidity.

This utility model takes following technical scheme to finish its invention task: it mainly is made up of axial actuating unit and frame type needle holder, and axial actuating unit is had adjusting nut by an end hollow axle constitutes with the threaded rod that is positioned at hollow axle.Adjusting nut and threaded rod are threaded engagement, hollow axle cooperates by the rotation of adjusting nut double thread connecting rod, screw motion is to adjust the distance of positions relatively, when promptly rotating adjusting nut, threaded rod is just moved as linear telescopic along axis direction in hollow axle, thereby can change the distance between the frame type needle holder that is connected with its two ends, make it to drive draw point and bone stump is played mechanical traction, pressurization; The frame type needle holder that is connected in axial actuating unit two ends is made of with being connected the direction adjustment piece on U type support two inner side edges and holding the pin bolt U type support, hold pin bolt sleeve Inbound and adjust in the bar shaped hole slot of piece and can and can do rotation at any angle, can penetrate when guaranteeing the non-parallel inserting needle of spicule fixing along the groove translation.Direction is adjusted the piece two ends and is connected on two inner side edges of U type support, loosening fastening bolt, and direction is adjusted piece and can be driven and hold the pin bolt and make tilt adjustments with the relative framework of the angle of threading a needle.Wherein the direction of front end is adjusted piece and is connected in the bar shaped hole slot that U type support dual-side front end sets, and loosening fastening bolt can move in the scope of hole slot restriction, and the distance that direction is adjusted between the piece can be adjusted, and adapts to needle gage and changes.Spicule penetrates in the hole of holding the pin bolt and by pressing the oncomelania mother that it is fastened on direction and adjusts on the piece.

This utility model has solved multidirectional usefulness and axial compression and strut function of threading a needle preferably on structural design.By mechanical test and calculating, this utility model possesses corresponding strength and rigidity, and it is respectively adjusted the joint and also can firmly be locked.Especially at the design aspect of holding pin mechanism, adopt U type support and direction adjustment piece and held the version that can change mutually between the pin bolt, make it not only can be adapted to the angle variation of many draw points, and can be adapted to the variation of the spacing in opposite planar between the draw point, improved the motility that fixed mount uses, need use mould to determine the operating procedure of position between the draw point thereby reduced or remitted other similar fixed mount.

Accompanying drawing 1 is this utility model example structure sketch map.

As shown in drawings, axial actuating unit of the present utility model is had adjusting nut 4 by an end hollow axle 3 constitutes with the threaded rod 5 that is positioned at hollow axle 3, adjusting nut 4 is a threaded engagement with threaded rod 5,4 (uniform distribution) threaded pin 8 is set on adjusting nut 4, and pin 8 front ends snap in the annular groove that the hollow axle relevant position sets.Make adjusting nut hollow axle rotation and can not moving forward and backward relatively, be connected in the guiding lock-screw 2 of threaded rod 5 other ends, under the restriction of the bar-shaped trough that hollow axle sets, play anti-rotation effect, tighten lock-screw 2 and just can make the length adjustment locking.The high adjusting nut 4 of turn can be adjusted the distance between the frame type needle holder that is connected to the hollow axle 3 and screw rod 5 other ends.The frame type needle holder that is connected to axial actuating unit two ends is by U type support 9, direction is adjusted piece 7 and is held pin bolt 1 formation, on direction adjustment piece 7, be milled with a bar shaped hole slot, hold that pin bolt 1 is inserted in the groove and can be along the groove translation and the anglec of rotation arbitrarily, the flanging that direction is adjusted piece 7 two ends is connected on two inner side edges of U type support 9 by fastening screw inspection 10, unclamp the fastening bolt 10 that direction is adjusted the piece two ends, it can drive holds pin bolt 1 and makes tilt adjustments with the angle of threading a needle, the front end of U type support 9 dual-sides has the bar shaped hole slot, the direction adjustment piece 7 that connects by hole slot can move (when unclamping clamp nut) along the scope of groove, making the direction of itself and U type support 9 rear ends adjust distance between the piece 7 can adjust to adapt to needle gage and change, in the time of in spicule penetrates the hole of holding pin bolt 1, tighten pressing nut 6, just it can be fastened on direction and adjust on the piece 7.

This utility model can adopt hard metal and stainless steel material processing to manufacture, and it is half screw needle of 4-6mm rustless steel that spicule adopts diameter, pierces in the body, is difficult for skidding off.

The using method of this utility model external fixer generally adopts epidural or local anesthesia.By C arm X-ray TV or determine the suitable inserting needle position of fracture end according to the X-ray sheet., displacement heavier person overlapping to fracturing, traction makes it tentatively to reset in advance.According to the performance of this fixed mount, that four spicules can be selected within the specific limits is non-parallel, the intersection inserting needle of multi-faceted angle, every side two pins are advisable at a distance of 2-4cm.After waiting to accomplish fluently draw point, fixed mount is adjusted.At first unclamping " guiding lock-screw " rotation " adjustment nut " with spanner exposes the pin hole of holding on " holding the pin bolt ", " hold the pin bolt " and make according to the position of each draw point and angle adjustment and hold the pin hole correspondence and be inserted in every draw point, adjust fixed mount apart from the about 2-3cm of skin.Under the X-ray TV, fracture end is done the adjustment that further resets then.Each Movable joint on fastening frame needle holder after the satisfaction, the rotation adjusting nut makes it to produce certain pretightning force and imposes on the suitable pressure of fracture face, tightens " guiding clamping screw " at last.

Claims (4)

1, a kind of one-sided multidirectional pin external fixer of holding, it is characterized in that mainly forming by axial actuating unit and frame type needle holder, axial actuating unit has the hollow axle (3) of adjusting nut (4) by an end and is positioned at threaded rod (5) formation of hollow axle, adjusting nut (4) is a threaded engagement with threaded rod (5), the frame type needle holder that is connected in axial actuating unit two ends is mainly by U type support (9), direction is adjusted piece (7) and is held pin bolt (1) and constitutes, hold that pin spiral shell inspection (1) is inserted in direction is adjusted bar shaped hole slot on the piece (7) and can be along groove translation and any anglec of rotation, direction is adjusted piece (7) two ends and is connected on U type support (9) two inner side edges, wherein the direction of front end adjustment piece (7) is connected in the bar shaped hole slot of U type support (9) dual-side front end, and can move forward and backward along hole slot, spicule penetrates in the hole of holding pin bolt (1) and by pressing nut (6) it is fastened on direction and adjusts on the piece (7).

2, according to the described one-sided multidirectional pin external fixer of holding of claim 1, it is characterized in that adjusting nut (4) is provided with pin (8), pin (8) front end snaps in the annular groove that hollow axle sets, and the cylindrical void that threaded rod (5) and hollow axle (3) set is provided with guiding lock-screw (2).

3,, it is characterized in that two U type supports (9) are connected with threaded rod (5) with the hollow axle (3) of axial actuating unit respectively according to the described one-sided multidirectional pin external fixer of holding of claim 1.

4,, it is characterized in that the two ends of direction adjustment piece (7) are connected on two inner side edges of U type support (9) by fastening bolt (10) according to the described one-sided multidirectional pin external fixer of holding of claim 1.

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