CN201537132U - Hollow screw guiding pin positioning device for femoral neck fractures - Google Patents

Abstract

The utility model relates to a hollow screw guiding pin positioning device for femoral neck fractures, comprising a wedge bolt, a first sleeve ring, a second sleeve ring, a sleeve ring washer, a hand lever, an inner sleeve barrel, an outer sleeve barrel, a top rod, an extension rod, a guiding seat and a Stenvers pin seat, wherein the first sleeve ring, the second sleeve ring and the sleeve ring washer are all sheathed on the wedge bolt and can rotate around the wedge bolt; the hand lever is connected with the wedge bolt through threads; the inner sleeve barrel and the extension rod are respectively fixed on the peripheral faces of the first sleeve ring and the second sleeve ring, the outer sleeve barrel is sheathed outside the inner sleeve barrel and can rotate around the inner sleeve barrel; the top rod is arranged in central through holes of the outer sleeve barrel and the inner sleeve barrel and can be wedged by the wedge bolt; and the guiding seat is rotationally connected with the outer sleeve barrel through a universal sphere embedded in the outer sleeve barrel, at least three guiding holes for guiding a hollow sleeve pipe of a hollow screw guiding pin to pass through are arranged on the guiding seat, and the Stenvers pin seat is sheathed on the extension rod and can move along the extension rod. The hollow screw guiding pin positioning device can rapidly realize the imbedding of the hollow screw guiding pin to avoid the pin being repeatedly penetrated.

Description

Fracture of femoral neck hollow screw guide pin locator

Technical field

This utility model relates to medical apparatus and instruments, relates in particular to the hollow screw guide pin positioner that is used for the fracture of femoral neck operative treatment.

Background technology

At present, adopt the method for closed reduction hollow screw internal fixation to treat usually to fracture of femoral neck.Before implanting hollow screw, three guide pins must be inserted the correct position of neck of femur.To be that the doctor is earlier free-hand insert first guide pin with electric drill to present method, inserts second and the 3rd guide pin according to the position of first guide pin by means of parallel guider again.Owing to do not appear neck of femur in the art, when inserting first guide pin, be difficult for obtaining satisfied position because of lacking necessary reference, often needing repeated multiple times to thread a needle could be successful, the person of lacking experience even put on tens of pins and also guide pin can't be inserted a more satisfactory position.Though inserting of second, third root guide pin wanted with respect to first guide pin easily, also usually can not guarantee once success.The time of repeatedly thread a needle and not only caused operating time prolongation, hemorrhage increase, tissue injury increasing the weight of and doctors and patients are exposed under the X line increases, more, thread a needle repeatedly and also may cause fracture fixation not firm because the Most patients neck of femur exists osteoporosis more or less.The present method of threading a needle is very high to the experience requirement of operator, and concerning most doctors, the success of accomplishing once to thread a needle hardly may.

Summary of the invention

Technical problem to be solved in the utility model is to provide a kind of fracture of femoral neck hollow screw guide pin locator that can realize accurately and quickly that the hollow screw guide pin is inserted.

The technical scheme that this utility model adopted is: a kind of fracture of femoral neck hollow screw guide pin locator comprises voussoir bolt, first lasso, second lasso, lasso packing ring, handle, inner sleeve, outer sleeve, push rod, extension rod, guide holder and steinman pin seat; The voussoir bolt is made up of a wedge portions and a threaded shank, and the peripheral outer wall of wedge portions is provided with first inclined-plane; First lasso, second lasso and lasso packing ring all are set on the voussoir bolt, and can rotate around this voussoir bolt; The lasso packing ring is arranged between the two opposite end faces of first lasso and second lasso; The threaded shank of voussoir bolt is stretched out second lasso, and is threaded with handle; Inner sleeve is fixed on the outer peripheral face of first lasso, and outer sleeve is set in outside this inner sleeve, and can rotate around inner sleeve; Push rod is arranged in the central through hole of outer sleeve and inner sleeve, and the lower end of push rod is provided with second inclined-plane that is complementary with first inclined-plane, and contacts with first inclined-plane of voussoir bolt by this second inclined-plane, and the upper end of push rod is provided with a ball and socket base; Guide holder is rotationally connected by a universal spheroid and an outer sleeve that is embedded in the outer sleeve, universal spheroid is supported on the ball and socket base, and link to each other with guide holder by a connecting rod, on guide holder, being provided with the pilot holes that at least three confession hollow sleeves pass, this hollow sleeve is used to guide the hollow screw guide pin; Extension rod is fixed on the outer peripheral face of second lasso, and the steinman pin cover for seat is located on this extension rod, and can move along extension rod, and this steinman pin seat is provided with a plurality of steinman pin holes that supply steinman pin to pass.

After adopting the technical solution of the utility model, the doctor can have an X-rayed by the X line, entry point and direct of travel to three guide pins assessed quickly and easily and adjusted simultaneously before guide pin penetrates skeleton, thereby realize three guide pin one-time positioning successes, effectively avoid the harm of having an X-rayed repeatedly, threading a needle and being brought repeatedly.In addition, this utility model also can greatly reduce operation to the empirical requirement of patient.

Description of drawings

Fig. 1 is the cross-sectional view of a kind of embodiment of the present utility model;

Fig. 2 is that the A of Fig. 1 is to local enlarged diagram.

The specific embodiment

Below in conjunction with accompanying drawing this utility model is made and to be further specified.

As shown in Figure 1, fracture of femoral neck hollow screw guide pin locator of the present utility model comprises voussoir bolt 1, first lasso 2, second lasso 3, lasso packing ring 4, handle 5, inner sleeve 6, outer sleeve 7, push rod 8, extension rod 9, guide holder 10 and steinman pin seat 11.Wherein, voussoir bolt 1 is made up of a wedge portions 1a and a threaded shank 1b, and the peripheral outer wall of wedge portions 1a is provided with first inclined-plane 111.First lasso 2, second lasso 3 and lasso packing ring 4 all are set on the voussoir bolt 1, and can rotate around this voussoir bolt 1.Lasso packing ring 4 is arranged between the two opposite end faces of first lasso 2 and second lasso 3, and the threaded shank 1b of voussoir bolt stretches out second lasso 3, and is connected with handle screw thread 5.

Inner sleeve 6 is fixed on the outer peripheral face of first lasso 2, and outer sleeve 7 is set in outside this inner sleeve 6, and can rotate around inner sleeve 6.In a kind of better embodiment, inner sleeve 6 links to each other with first lasso 2 by the mode of welding.The lower end of outer sleeve 7 is provided with a thread bush 14, and this outer sleeve is enclosed within on the thread bush 14, and is threaded with this thread bush 14.Thread bush 14 is enclosed within on the inner sleeve 6, also is provided with the ring-shaped step 15 that stops thread bush 14 to move up on the peripheral outer wall of inner sleeve 6.Push rod 8 is arranged in the central through hole of outer sleeve 7 and inner sleeve 6, the lower end of push rod 8 is provided with second inclined-plane 801 that is complementary with first inclined-plane 111, and contact with first inclined-plane 111 of voussoir bolt by this second inclined-plane 801, the upper end of push rod 8 is provided with a ball and socket base 81.Guide holder 10 is rotationally connected with outer sleeve 7 by a universal spheroid 12 that is embedded in the outer sleeve 7, universal spheroid 12 is supported on the ball and socket base 81, and link to each other with guide holder 10 by a connecting rod 13, be provided with at least three pilot holes 101 that supply hollow sleeve to pass on guide holder 10, above-mentioned hollow sleeve is used to guide the hollow screw guide pin.As shown in the figure, the quantity of pilot hole 101 also can be greater than 3, so that adjust the position of hollow sleeve.Offer on the peripheral outer wall of the upper end of trocar sheath 7 one can ccontaining connecting rod 13 breach, thereby make guide holder 10 obtain the bigger anglec of rotation.

In conjunction with shown in Figure 2, extension rod 9 is fixed on the outer peripheral face of second lasso 3, and steinman pin seat 11 is set on this extension rod 9, and can move along extension rod 9.Steinman pin seat 11 is provided with a plurality of steinman pin holes that supply steinman pin to pass.In a kind of better embodiment, extension rod 9 links to each other with second lasso 3 by the mode that is welded to connect.Steinman pin seat 11 comprises a body 11a and a movable block 11b, and body 11a is set in outside the extension rod 9, and is locked on this extension rod 9 by a Lock Part.This Lock Part is a clamping screw 16, and clamping screw 16 is threaded with body 11a, and the end face of clamping screw 16 is against extension rod 9.Movable block 11b is locked on the body 11a by a locked component.This locked component comprises a bolt 19 and thread handle 17, and bolt 19 runs through body 11a and movable part 11b, and wherein, an end of bolt 19 is fixed on the body 11a, and the other end stretches out movable part 11b, and is threaded with thread handle 17.As shown in Figure 2, preferably, clamping screw 16 be arranged in parallel with thread handle 17, and clamping screw 16 is perpendicular to handle 5.Each steinman pin hole is limited jointly by the first groove 18a and the second groove 18b and forms, and the first groove 18a is arranged on the one side of movable block with respect to body, and the second groove 18b is arranged on the one side of body with respect to first groove.By regulating thread handle 17, can regulate the spacing between the first groove 18a and the 2nd 18b.When thread handle 17 lockings, movable block 11b tightly is pressed in the surface of body 11a.The shape of the first groove 18a and the second groove 18b is circular-arc, each other symmetry.A plurality of steinman pins hole is located on the same line.

Operation principle of the present utility model is: during use, earlier passing the steinman pin hole with 2 pieces of steinman pins is fixed on patient's the femoral shaft, unscrew handle 5 and clamping screw 16 then, thereby the inner sleeve 6 that is connected on first lasso 2 can be rotated around voussoir bolt 1, and guide holder 10 also can rotate in ball and socket base 81 by universal spheroid 12; In addition, steinman pin seat 11 can prolong extension rod 9 and moving freely.Adjust guide holder 10 and the position of hollow sleeve in guide holder 10, after the position of hollow sleeve under X line postero-anterior position and the side position perspective is satisfied, screw handle 5 and clamping screw 16 again.Owing to after handle 5 screws, can apply a pressure to second lasso 3, thereby increase the frictional force between lasso packing ring 4 and first lasso 2 and second lasso 3, this frictional force can't produce relative rotation win lasso 2 and second lasso 3 again.In addition, can make voussoir bolt 1 produce straight-line displacement owing to screw handle 5 to handle 5 directions, thereby make second inclined-plane 801 of first inclined-plane, the 111 wedging push rods of voussoir bolt 1, push rod 8 is by jack-up, ball and socket base 81 withstands universal spheroid 12, universal spheroid 12 can't be with respect to rotating in the ball and socket base 81, thereby with guide holder 10 lockings.Screwing handle 16 can be locked in the body 11a of steinman pin seat 11 on the extension rod 9, and steinman pin seat 11 can not be moved.Like this, whole localizer just has been fixed in place.

Claims (8)

1. a fracture of femoral neck hollow screw guide pin locator is characterized in that,

Comprise voussoir bolt, first lasso, second lasso, lasso packing ring, handle, inner sleeve, outer sleeve, push rod, extension rod, guide holder and steinman pin seat;

Described voussoir bolt is made up of a wedge portions and a threaded shank, and the peripheral outer wall of described wedge portions is provided with first inclined-plane; Described first lasso, second lasso and lasso packing ring all are set on the described voussoir bolt, and can rotate around this voussoir bolt; Described lasso packing ring is arranged between the two opposite end faces of first lasso and second lasso; The threaded shank of voussoir bolt is stretched out second lasso, and is threaded with described handle;

Described inner sleeve is fixed on the outer peripheral face of first lasso, and described outer sleeve is set in outside this inner sleeve, and can rotate around inner sleeve; Described push rod is arranged in the central through hole of outer sleeve and inner sleeve, and the lower end of push rod is provided with second inclined-plane that is complementary with described first inclined-plane, and contacts with first inclined-plane of voussoir bolt by this second inclined-plane, and the upper end of push rod is provided with a ball and socket base; Described guide holder is rotationally connected by a universal spheroid and an outer sleeve that is embedded in the outer sleeve, described universal spheroid is supported on the described ball and socket base, and link to each other with guide holder by a connecting rod, be provided with at least three pilot holes that supply hollow sleeve to pass on guide holder, described hollow sleeve is used to guide described hollow screw guide pin;

Described extension rod is fixed on the outer peripheral face of second lasso, and described steinman pin cover for seat is located on this extension rod, and can move along extension rod, and this steinman pin seat is provided with a plurality of steinman pin holes that supply steinman pin to pass.

2. guide pin locator as claimed in claim 1 is characterized in that,

Described steinman pin seat comprises a body and a movable block, and described body is set in outside the described extension rod, and is locked on this extension rod by a Lock Part; Described movable block is locked on the described body by a locked component;

Each steinman pin hole is limited jointly by first groove and second groove and forms, and described first groove is arranged on the one side of movable block with respect to body, and described second groove is arranged on the one side of body with respect to first groove.

3. guide pin locator as claimed in claim 2 is characterized in that, described Lock Part is a clamping screw, and this clamping screw is threaded with described body, and the end face of clamping screw is against extension rod; Described locked component comprises a bolt and thread handle, described bolt-through body and movable part, and wherein, an end of bolt is fixed on the body, and the other end stretches out movable part, and is threaded with described thread handle.

4. guide pin locator as claimed in claim 3 is characterized in that, first groove and second groove are circular-arc.

5. guide pin locator as claimed in claim 4 is characterized in that, a plurality of steinman pins hole is located on the same line.

6. guide pin locator as claimed in claim 3 is characterized in that, described clamping screw and described thread handle be arranged in parallel, and this clamping screw is perpendicular to handle.

7. guide pin locator as claimed in claim 1 is characterized in that, offer on the peripheral outer wall of the upper end of described trocar sheath one can ccontaining universal spheroid the breach of connecting rod.

8. guide pin locator as claimed in claim 1 is characterized in that the lower end of described outer sleeve is provided with a thread bush, and this outer sleeve is enclosed within on this thread bush, and is threaded with this thread bush; This thread bush is enclosed within on the described inner sleeve; On the peripheral outer wall of inner sleeve, also be provided with a ring-shaped step that stops thread bush to move up.

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