CN202497228U - Spiral blade type femur near-end minimally invasive lockplate - Google Patents

Abstract

The utility model relates to a spiral blade type femur near-end minimally invasive lockplate, comprising a femur near-end minimally invasive lockplate, a spiral blade main nail and a retreat-preventing screw. The femur near-end minimally invasive lockplate is provided with a main nail hole at an near-end; the lower end of the main nail hole is provided with a retreat-preventing screw hole, the middle lower part is provided with a plurality of locking holes; the near-end top of the lockplate is provided with a screw through hole and a far-end is provided with two aiming holes used for matching with minimally invasive operation tools. In operation the spiral blade main nail is matching with a non-cylindrical main nail hole on the femur near-end minimally invasive lockplate; the retreat-preventing screw is screwed into the retreat-preventing screw hole on the lockplate to prevent the main nail from retreating. The advantages are that the lockplate is cooperated with a spiral blade for use to realize slide pressurization; the lockplate is rotation-preventing and is especially suitable for osteoporosis patients, the operation being convenient and easy; the special design of the lockplate and hollow design of the spiral blade main nail and the retreat-preventing screw hole are in cooperation with operation tools to realize operation minimal invasion, notches and wound being small.

Description

A kind of circular knife chip near end of thighbone Wicresoft lockplate

[technical field]

This utility model relates to the orthopedic medical device technical field, specifically, is a kind of fixed circular knife chip of fractured near end of thighbone near end of thighbone Wicresoft internal fixation device that is used for.

[background technology]

Fractured near end of thighbone mainly involves the old people, and women's sickness rate is three times of male.No matter whether elderly patient has primary disease; Fracture back long-term bed expectant treatment all has fatal threat; Operative treatment can make each item complication of fractured near end of thighbone and mortality rate reduce, and therefore, operative treatment becomes the prefered method of present fractured near end of thighbone.

At present to fractured near end of thighbone, the therapeutic method of surgery of taking mainly contains: the marrow external fixation system, as near end of thighbone locking compression steel plate (Locking Compression Plate, LCP), dynamic hip screw (Dynamic Hip Screw, DHS) etc.; Intramedullary pin is fixed, as Gamma nail, PFN (Proximal Femoral Nail, PFN), near end of thighbone anti-revolve intramedullary pin (Proximal Femoral Nail Antirotation, PFNA) etc.

In the marrow external fixation system, DHS can make fracture end produce the power pressurization, promotes knitting; But its anti-rotation performance is not enough; To complicated fracture or the serious fracture of osteoporosis, DHS can not play strong fixation, is prone to cause complication such as screw cutting femoral head or steel plate fatigue break.Near end of thighbone LCP, through thread lock, a kind of frame structure that forms between nail-plate can be carried out effective support to fracture between its nail-plate, and the one-tenth angle between the stable dependence nail-plate of fracture end is stable, rather than the frictional force between steel plate and the surface of bone; Its near-end generally is angle distribution through many pieces of lock screw in neck of femur, better anti-turning effort is provided.

During intramedullary pin was fixing, from the Gamma nail, to PFN, to PFNA, product was updated.Fixedly the arm of force is short owing to it for the Gamma nail, and the load transmission is reasonable; But its anti-rotatory is poor, and distal locking nail is nearer with main nail distance between two tips simultaneously, is prone to produce stress concentration, causes fracture of shaft of femur.PFN has overcome the shortcoming of Gamma nail, and near-end has increased by 1 piece of anti-screw that revolves, and distal locking nail and the distance lengthening of following closely point have been realized flexible fastening simultaneously, have reduced complication such as fracture of shaft of femur; But squeeze into the design of 2 pieces of screws in the neck of femur, limited the slip between main nail and the forcing screw, fractional load is revolved the screw transmission through anti-, often occurs anti-ly revolving screw cutting, forcing screw and complication such as withdrawing from.PFNA is the improvement product of PFN; Its maximum characteristics are its screw blades, and in squeezing into process, screw blade rotates, tamps sclerotin; Form firm anchor between the contact area that it is most advanced and sophisticated roomy and the sclerotin of compacting and make a concerted effort, make the femur head and neck obtain strong internal fixation.The particular design of screw blade master nail has limited the rotary moveable of blade, and it can only be endwisely slipped along main nail, when accomplishing the fracture end pressurization, can obtain better anti-rotation and support effect.

Anti-rotational these characteristics of screw blade among the PFNA just; Impel the inventor to produce a kind of idea that screw blade is combined with lockplate; While is along with the continuous development of operation Wicresoft theory; Design a kind of circular knife chip near end of thighbone Wicresoft lockplate, can realize that operative incision is little, wound is little, patient's hospital stays short, very important meaning is arranged.

[utility model content]

The purpose of this utility model is to provide a kind of circular knife chip near end of thighbone Wicresoft lockplate; Be used near end of thighbone tuberosity part fracture fixation; Steel plate Wicresoft design otch is little, wound is little, facilitating operation; The use of screw blade simultaneously is specially adapted to sufferers of osteoporosis face, has the remarkable anti-characteristics of revolving simultaneously.

The purpose of this utility model realizes through following technical scheme:

A kind of circular knife chip near end of thighbone Wicresoft lockplate is characterized in that, is made up of near end of thighbone Wicresoft lockplate, screw blade master nail, anti-back screw; Screw blade master nail matees with the main nail hole of near end of thighbone Wicresoft lockplate; The anti-back screw be screwed on the near end of thighbone Wicresoft lockplate the anti-back screwed hole in case main nail withdraw from.

Described near end of thighbone Wicresoft lockplate, its cross section is except that the near-end top, and it is diminished by near-end to far-end gradually, and the far-end afterbody is shuttle type structure, so that plate is implanted.

Described near end of thighbone Wicresoft lockplate, its inboard is circular arc, so that fit with femur better when implanting; Outside near-end is circular arc, and its arc radius is less than the inner arc radius; Middle and lower part, the outside is provided with a plane, reduces incisura, simultaneously so that screw is implanted and the matching with micro-traumatic operation tool uses.

Described near end of thighbone Wicresoft lockplate, its proximal top is provided with a tapped through hole, in order to connect Wicresoft's diopter; Its near-end is provided with a main nail hole; Main nail lower end, hole is provided with an anti-back screwed hole; Its middle and lower part is provided with some lock holes successively, in order to implant locking nail; Its far-end is provided with two aiming through holes, in order to connect Wicresoft's diopter.

Described main nail hole, main nail hole axially and the inner arc axis of near end of thighbone Wicresoft lockplate in obtuse angle, can design different size according to femoral neck shaft angle; Main nail cross section, hole is non-circular, and after outer sleeve cooperated, outer sleeve can not axially rotate around the hole, can only move along its axis.

Described near end of thighbone Wicresoft lockplate, it designs for axial symmetry, and left and right sides femur all can use.

Described near end of thighbone Wicresoft lockplate, its near-end is provided with an end face, and engagement tool is squeezed into use in the time of can supplying to implant plate.

Described screw blade master nail, it is made up of circular knife lamellar body, screw, outer sleeve and nut.

Described circular knife lamellar body is characterized in that it totally is column, and is hollow design; The front end blade is shape in the shape of a spiral; The middle part is provided with the protrusion cylinder, in order to spacing, prevents that outer sleeve from skidding off; The rear end is provided with a U type groove, cooperates with head of screw; Rear end tails is provided with a U type groove, cooperates with the screw cervical region; Rear end tails is provided with a circle crown, in order to nut on crown cooperate screens.

Described screw, screw are hollow design; The screw head diameter is greater than recess diameter; The screw afterbody is provided with inner hexagonal hole, and the inner hexagonal hole opposite side distance leaves greater than the intermediate throughholes diameter; The screw cadre is provided with external screw thread.

Described outer sleeve, outer sleeve are hollow design, hypomere cylinder coupling in aperture and the circular knife lamellar body; Outer sleeve outer peripheral face non-cylindrical after main nail hole cooperates, can not axially rotate around the hole, can only move vertically; The tail end inwall is provided with two convexities, in order to hold-doun nut.

Described nut, nut is a hollow design, is provided with female thread, matees with the screw external screw thread; The nut head diameter is greater than the cadre; Cadre's diameter and outer sleeve hollow hole coupling are so that be inserted in; The cadre both sides are provided with one or two jump ring, are stuck in the high spot of outer sleeve tail end, in order to spacing fixing; The nut afterbody is provided with a circle crown, cooperates screens with crown on the circular knife lamellar body.

Described screw blade master nail, its assemble flow is: nut is inserted outer sleeve inwall two high spots through its jump ring, and so far nut and outer sleeve fixedly become one; Screw head is inserted in the circular knife lamellar body U moldeed depth groove, outer sleeve is enclosed within outside the screw again, through die nut screw and nut are tightened gradually, but not exclusively tightened, leave certain interval, for the pressurization of sliding, so far the screw blade master binds and joins completion.

Described screw blade master nail, it has the slip pressurization function, and through tightening of nut and screw, the main nail of control length diminishes, the function of pressurization thereby realization is slided.

Described anti-back screw, it is a hollow design; The nail body is provided with external screw thread, cooperates with anti-back screwed hole on the lockplate; Head of screw is provided with inner hexagonal hole or plum blossom hole etc., uses above nail; Head diameter is greater than the nail body, and behind the implantation lockplate, head has the overlapping region with main nail hole.

Compared with prior art, the good effect of this utility model is:

(1) lockplate cooperates screw blade to use, and can realize the pressurization of sliding, anti-revolving, and be specially adapted to sufferers of osteoporosis face, facilitating operation is easy to operate.

(2) hollow design of the unique design of lockplate and screw blade master nail and anti-back screw cooperates operation tool can realize the Wicresoft that performs the operation, and otch is little, and wound is little.

[description of drawings]

A kind of circular knife chip of Fig. 1 this utility model near end of thighbone Wicresoft lockplate schematic three dimensional views;

Fig. 2 this utility model assembly---near end of thighbone Wicresoft lockplate sketch map; Wherein, 2A is a front view, and 2B is a vertical view, and 2C is a cutaway view, and 2D is a side view, and 2E is a upward view, and 2F is a partial enlarged drawing;

Fig. 3 this utility model assembly---the screw blade master follows closely sketch map; 3A is an axonometric chart, the 3B enlarged drawing;

Fig. 4 this utility model assembly---anti-back screw sketch map; 4A is a left view, 4B left and right sides view;

Label in the accompanying drawing is respectively: 1, near end of thighbone Wicresoft lockplate, 2, screw blade master nail, 3, the anti-back screw, 11, the lockplate main body that diminishes gradually of cross section, 12, far-end shuttle type structure, 13, outer arc; 14, inner arc, 15, outer side plane, 16, tapped through hole, 17, main nail hole, 18, the anti-back screwed hole, 19, the aiming aperture; 110, lock hole, 111, proximal face, 21, the circular knife lamellar body, 22, screw, 23, outer sleeve, 24, nut; 211, screw blade, 212, cylinder, 213, the large U type groove, 214, little U type groove, 215, crown, 216, the through hole of circular knife lamellar body; 217, cylinder, 221, the ailhead cylinder, 222, inner hexagonal hole, 223, external screw thread, 224, the cervical region cylinder, 225, the through hole of screw; 231, outer peripheral face, 232, the through hole of outer sleeve, 233, inwall is protruding, 241, female thread, 242, jump ring, 243, crown; 244, head of a nail head, 31, external screw thread, 32, inner hexagonal hole, 33, screw head, 34, the through hole of anti-back screw.

[specific embodiment]

The specific embodiment of a kind of circular knife chip of this utility model near end of thighbone Wicresoft lockplate below is provided.

Embodiment 1

See also accompanyingdrawing 1,2A, 2B, 2C, 2D; 2E, 2F, 3A, 3B; 4A, 4B, a kind of circular knife chip near end of thighbone Wicresoft internal fixation device, by near end of thighbone Wicresoft lockplate 1, screw blade master follow closely 2, anti-back screw 3 forms; Be used near end of thighbone tuberosity part fracture fixation, marrow external fixation DHS different from the past or near end of thighbone locking steel plate, the hollow design of the unique design of this utility model lockplate and screw blade master nail and anti-back screw cooperates operation tool can realize the Wicresoft that performs the operation; Otch is little, wound is little, facilitating operation, and the use of screw blade master nail simultaneously is specially adapted to sufferers of osteoporosis face, has the remarkable anti-characteristics of revolving simultaneously, and slidably pressurization.

Accompanying drawing 1 is this utility model system schematic three dimensional views, accompanyingdrawing 2A, and 2B, 2C, 2D, 2E, 2F, 3A, 3B, 4A, 4B are this utility model assembly sketch map.

Described near end of thighbone Wicresoft lockplate, its cross section diminishes 11 by near-end to far-end gradually except that the near-end top, and the far-end afterbody isshuttle type structure 12, so that plate is implanted.

Described near end of thighbone Wicresoft lockplate, its inboard iscircular arc 14, so that fit with femur better when implanting; Outside near-end iscircular arc 13, and its arc radius is less than the inner arc radius; Middle and lower part, the outside is provided with aplane 15, reduces incisura, simultaneously so that screw is implanted and the matching with micro-traumatic operation tool uses.

Described near end of thighbone Wicresoft lockplate, its proximal top is provided with a tapped throughhole 16, and far-end is provided with two aiming throughholes 19, in order to connect Wicresoft's diopter; The near-end of plate is provided with amain nail hole 17; Main nail lower end, hole is provided with an anti-back screwedhole 18; The middle and lower part of plate is provided with somelock holes 110 successively, in order to implant locking nail.

Describedmain nail hole 17, its axially and plate inner arc axis in obtuse angle, can design different size according to femoral neck shaft angle; Main nail cross section, hole is non-circular, and the hole inwall is provided with respect to the symmetric both sides of axis concave edge.

Described near end of thighbone Wicresoft lockplate, for axial symmetry designs, left and right sides femur all can use.

Described far-end two aiming throughholes 19, with respect to plate central plane symmetry, with operation tool be used the realization Minimally Invasive Surgery.

Described near end of thighbone Wicresoft lockplate, its near-end is provided with anend face 111, and engagement tool is squeezed into use in the time of can supplying to implant plate.

Described screw blade master follows closely 2, is made up of circular knife lamellar body 21, screw 22, outer sleeve 23 and nut 24.

Described circular knife lamellar body 21 is column, and is hollow design, is the through hole 216 of circular knife lamellar body; The front end blade is shape 211 in the shape of a spiral; The middle part is provided with protrusion cylinder 212, in order to spacing, prevents that outer sleeve from skidding off; The rear end is provided with a U type groove 213, cooperates with head of screw; Rear end tails is provided with a U type groove 214, cooperates with the screw cervical region; Rear end tails is provided with a circle crown 215, in order to nut on crown cooperate screens.

Described screw 22 is hollow design, is the through hole 225 of screw; Screw head 221 diameters are greater than recess diameter 224; The screw afterbody is provided with inner hexagonal hole 222, and the inner hexagonal hole opposite side distance leaves greater than intermediate throughholes 225 diameters; The screw cadre is provided with external screw thread 223.

Described outer sleeve 23 is hollow design, is the through hole 232 of outer sleeve, hypomere cylinder 217 couplings in aperture and the circular knife lamellar body; Outer sleeve outer peripheral face 231 non-cylindricals are provided with respect to axis symmetry both sides chimb, after main nail hole cooperates, can not axially rotate around the hole, can only move along its axis; The tail end inwall is provided with two convexities 233, in order to hold-doun nut.

Described nut 24 is hollow design, is provided with female thread 241, with screw external screw thread 223 couplings; Nut head 244 diameters are greater than the cadre; Cadre's diameter and outer sleeve hollow hole 232 couplings are so that be inserted in; The cadre side is provided with jump ring 242, is stuck in the high spot 233 of outer sleeve tail end, in order to spacing fixing; The nut afterbody is provided with that crown 215 cooperates screens on circle crown 243 and the circular knife lamellar body.

Described screw blade master follows closely 2, and its assemble flow is: nut 24 is inserted outer sleeve 23 inwalls two high spots 233 through its side jump ring 242, and so far nut 24 fixedly becomes one with outer sleeve 23; Screw head 221 is inserted in the circular knife lamellar body U moldeed depth groove 213, again outer sleeve 23 is enclosed within outside the screw 22, screw 22 and nut 24 are tightened gradually through die nut; But not exclusively tighten; Leave certain interval, for the pressurization of sliding, so far the screw blade master follows closely 2 assembling completion.

Described screw blade master follows closely 2, has the slip pressurization function, and through tightening of nut 24 and screw 22, the main nail of control length diminishes, thereby realizes the function of slip pressurization.

Described anti-back screw 3 is hollow design, is the throughhole 34 of anti-back screw; The nail body is provided withexternal screw thread 31, cooperates with anti-back screwedhole 18 on the lockplate; Head of screw is provided with innerhexagonal hole 32, uses above nail;Head 33 diameters are screwed intoback screw head 33 and blockmain nail hole 17, with anti-back greater than the nail body.

The above only is the preferred implementation of this utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from this utility model design; Can also make some improvement and retouching, these improvement and retouching also should be regarded as in the protection domain of this utility model.

Claims (8)

1. a circular knife chip near end of thighbone Wicresoft lockplate is characterized in that, is made up of near end of thighbone Wicresoft lockplate, screw blade master nail, anti-back screw; Screw blade master nail matees with the main nail hole of near end of thighbone Wicresoft lockplate; The anti-back screw be screwed on the near end of thighbone Wicresoft lockplate the anti-back screwed hole in case main nail withdraw from.

2. a kind of circular knife chip near end of thighbone as claimed in claim 1 Wicresoft lockplate is characterized in that, described near end of thighbone Wicresoft lockplate, and its cross section is except that the near-end top, and it is diminished by near-end to far-end gradually, and the far-end afterbody is shuttle type structure;

Described near end of thighbone Wicresoft lockplate, its inboard is circular arc; Outside near-end is circular arc, and its arc radius is less than the inner arc radius; Middle and lower part, the outside is provided with a plane.

3. like claim 1 or 2 described a kind of circular knife chip near end of thighbone Wicresoft lockplates, it is characterized in that, described near end of thighbone Wicresoft lockplate, its proximal top is provided with a tapped through hole; Its near-end is provided with a main nail hole; Main nail lower end, hole is provided with an anti-back screwed hole; Its middle and lower part is provided with some lock holes successively; Its far-end is provided with two aiming through holes;

Described near end of thighbone Wicresoft lockplate, it designs for axial symmetry;

Described near end of thighbone Wicresoft lockplate, its near-end is provided with an end face.

4. like claim 1 or 2 described a kind of circular knife chip near end of thighbone Wicresoft lockplates, it is characterized in that, described main nail hole, main nail hole axially with the inner arc axis of near end of thighbone Wicresoft lockplate in obtuse angle, the main cross section, hole of following closely is non-circular.

5. a kind of circular knife chip near end of thighbone as claimed in claim 1 Wicresoft lockplate is characterized in that, described screw blade master nail, and it is made up of circular knife lamellar body, screw, outer sleeve and nut.

6. a kind of circular knife chip near end of thighbone as claimed in claim 5 Wicresoft lockplate is characterized in that, described circular knife lamellar body, and it totally is column, and is hollow design; The front end blade is shape in the shape of a spiral; The middle part is provided with the protrusion cylinder; The rear end is provided with a U type groove, cooperates with head of screw; Rear end tails is provided with a U type groove, cooperates with the screw cervical region; Rear end tails is provided with a circle crown, in order to nut on crown cooperate screens.

7. a kind of circular knife chip near end of thighbone as claimed in claim 5 Wicresoft lockplate is characterized in that described outer sleeve is a hollow design, hypomere cylinder coupling in aperture and the circular knife lamellar body; Outer sleeve outer peripheral face non-cylindrical; The tail end inwall is provided with two convexities.

8. a kind of circular knife chip near end of thighbone as claimed in claim 1 Wicresoft lockplate is characterized in that described anti-back screw is a hollow design; The nail body is provided with external screw thread, cooperates with anti-back screwed hole on the lockplate; Head of screw is provided with inner hexagonal hole or plum blossom hole; Head diameter is greater than the nail body.

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