CN202146355U - Femoral proximal triangular intramedullary nail - Google Patents

Abstract

The utility model relates to a femoral proximal triangular intramedullary nail which comprises a main nail entering from the peak of the greater trochanter; a proximal first locking nail, a proximal second locking nail and a distal locking nail are arranged on the main nail from the top down in sequence; from the side view, a proximal first round hole, a proximal second round hole and a distal tuning fork structure are arranged on the main nail from the top down in sequence, wherein the axle centers of the proximal first round hole, the proximal second round hole and the distal tuning fork structure are all on the center line of the side surface of the main nail; the distal locking nail is inserted in the distal tuning fork structure; the proximal second locking nail passes through the proximal second round hole; a second locking nail round hole is formed at the center of the front of the proximal second locking nail; the proximal first locking nail respectively passes through the proximal first round hole and the second locking nail round hole; and the distal first locking nail, the proximal second locking nail and the proximal main nail form a triangular structure. The femoral proximal triangular intramedullary nail adopts the principle of triangular stability, can increase the stability of a screw in the femoral head and the neck, has a reasonable structural design, and reduces that varus deformity of hip joints occurs in early times after hip fracture internal fixation of the old.

Description

Near end of thighbone triangle intramedullary pin

Technical field

This utility model relates to the field of medical science, especially a kind of near end of thighbone triangle intramedullary pin that is used for fixing the femoral bone tuberosity surrounding fracture.

Background technology

Along with the development of society, the improving constantly of living standards of the people, especially constantly perfect sanitary health career makes China get into aging society.Because the gerontal patient all has degrees of osteoporotic; Especially hip is osteoporotic predilection site; Slight wound or get injured by a fall and to cause Hip Fracture (comprising fracture of femoral neck, intertrochanteric fracture of the femur etc.); Therefore Hip Fracture is the fracture site of common in older people, and selecting correct Therapeutic Method is to improve the quality of living and the key point of rehabilitation.

At present, PFN is the ideal internal fixation material of treatment femoral intertrochanteric and subtrochanteric fracture, has successively experienced gamma nail, has rebuild serial differentiation such as nail, PFN, PFNA, Intertan; The internal fixation theory is more and more perfect; Effect is gradually desirable, but still the failure report is arranged, and main complication is that the interior talipes varus of generation hip joint, screw cut out (cut-out) from femoral head behind the internal fixation; Through long-term clinical empirical summary; The main cause of finding the PFN failure is that internal fixation is imprecise owing to gerontal patient's osteoporosis, fixedly due to the later stage stability deficiency.

The utility model content

The technical problem that this utility model will solve is: in order to overcome the above-mentioned middle problem that exists; A kind of near end of thighbone triangle intramedullary pin is provided; It utilizes the triangle stability principle; Increase the stability of screw in femoral head, neck, prevent to take place behind the early loading complication such as coxa vara deformity and femoral head cut out.

This utility model solves the technical scheme that its technical problem adopted: a kind of near end of thighbone triangle intramedullary pin; Comprise the main nail that advances nail from the greater trochanter summit; Described main nail is disposed with near section first pinning, nearly section second pinning and section pinning far away from top to bottom; Described main nail norma lateralis offers near section first circular hole, nearly section second circular hole and section tuning fork structure far away from top to bottom successively, and its three axle center all on the lateral centrage of main nail, is plugged with far away section pinning in the described far away section tuning fork structure; Described near section second pinning passes near section second circular hole; The front middle part of nearly section second pinning offers the second pinning circular hole, and described near section first pinning passes near section first circular hole and the second pinning circular hole respectively, and described near section first pinning, nearly section second pinning and the nearly section of main nail form triangular structure.

In order to make main nail be more prone to advance nail from the greater trochanter summit, have outer drift angle between described main nail anterior view nearly section axis and the section axis far away, its outer drift angle angle is 5～7 °.

Have outer drift angle between described main nail anterior view nearly section axis and the section axis far away, its outer drift angle angle is 6 °.

Pass in order to hold near section first pinning just, have angle between described second pinning circular hole axial line and the nearly section second pinning axial line, its angle is 45～55 °.

Angle is 54 ° between described second pinning circular hole axial line and the nearly section second pinning axial line.

Described near section first circular hole aperture is 6～8mm with the nearly section first pinning diameter; The nearly section second circular hole aperture is 10～12mm with the nearly section second pinning diameter; Section tuning fork structure spacing far away is 4～5mm; Use in order to adapt to different patients, according to patient's femoral bone cavitas medullaris diameter, near section diameter of main nail is 15～17mm, and section diameter far away is 8～12mm.

In order to make near section first pinning just in time pass near section first circular hole and to adapt to patient's sclerotin quality difference, described near section first pinning axial line is vertical each other with the nearly section of main nail axial line, and its front portion is screw thread or screw blade structure, and tail end is interior hexagonal structure; Angle is 150 ° between described near section second pinning axial line and the main nail section far away axial line; Its front portion is screw thread or screw blade structure; Tail end offers groove and is telescopic female thread structure, and the groove type design is into to follow closely sounding mark, also is the anterior circular hole of nearly section second pinning plane labelling; The sleeve design of female thread can realize the pressurization of fracture end; Described far away section pinning is the full thread structure, and its tail end is interior hexagonal structure.

Use in order to adapt to different patients; Thickness, length based on patient's neck of femur are different; Described near section first pinning axial line and the nearly section second pinning axial line are 4～6cm in the distance between on the main nail section far away axial line, and the described distance of this patent is 5cm; The second pinning circular hole distance of shaft centers is from being 5～7cm near section second pinning for described near section second pinning axial line and main nail section far away axial line intersection point, and the described distance of this patent is 6cm; Distance is 1～3cm between described near section first pinning axis and the main nail near-end summit, and the described distance of this patent is 2cm.

Use in order to adapt to different patients, and different according to patient's fracture site, described near section first pinning length is 70～100mm, and the nearly section second pinning length is 80～120mm, and main nail length is 170～320mm.

Use in order to adapt to different patients, different based on patient's fracture site, the length of main nail is 170,200,240,300, and the main nail length that this patent is selected for use is 170mm, and main nail needs lengthening, only need add long-range section pinning with part far away.

The material that described near section first pinning, nearly section second pinning, section pinning far away and main nail all adopt is medical stainless steel or titanium alloy.

For operation under the guide pin guiding that can be convenient, described main nail, nearly section first pinning and nearly section second pinning are hollow-core construction, and the guide pin diameter of its use is 2.8～3.2mm, and section pinning far away is solid nail.

For main nail operating grip is installed, described main nail near-end medial surface also is provided with screw thread and bayonet socket.

In order to increase the intensity of main nail, section far away pinning place, main nail section far away side is a tuning fork structure, and main nail section far away pinning place is positive for slotted hole designs, and without tuning fork structure.

The beneficial effect of the near end of thighbone triangle intramedullary pin of this utility model is: utilize main nail, nearly section first pinning and the nearly section second pinning three's combination, adopt the triangle stability principle, can increase the stability of screw in femoral head, neck; Be designed to screw thread or screw blade structure in nearly section first pinning and the nearly section second pinning front portion; The patient that can better adapt to all ages and classes and sclerotin; This reasonable in design has reduced the probability that talipes varus and screw cut out from femoral head in the hip joint has taken place behind the old Hip Fracture internal fixation.

Description of drawings

Below in conjunction with accompanying drawing and embodiment this utility model is further specified.

Fig. 1 is the axonometric chart of the nearly section of the described femur of this utility model triangle intramedullary pin;

Fig. 2 is the normotopia view of main nail in the nearly section of the described femur of this utility model triangle intramedullary pin;

Fig. 3 is the side position view of main nail in the nearly section of the described femur of this utility model triangle intramedullary pin;

Fig. 4 is the normotopia view of nearly section second pinning in the nearly section of the described femur of this utility model triangle intramedullary pin;

Fig. 5 is the side position view of nearly section second pinning in the nearly section of the described femur of this utility model triangle intramedullary pin

Fig. 6 is the structural representation of nearly section first pinning in the nearly section of the described femur of this utility model triangle intramedullary pin;

Fig. 7 is the structural representation of section pinning far away in the nearly section of the described femur of this utility model triangle intramedullary pin.

1. main nails among the figure, 11. nearly section first circular holes, 12. nearly section second circular holes, 13. far away sections tuning fork structures, 2. near section first pinning, 3. near section second pinning, 31. second pinning circular holes,section pinning 4. far away.

The specific embodiment

Combine accompanying drawing that this utility model is done further detailed explanation now.These accompanying drawings are the sketch map of simplification, the basic structure of this utility model only is described in a schematic way, so it only show the formation relevant with this utility model.

Like Fig. 1, Fig. 2 and near end of thighbone triangle intramedullary pin shown in Figure 3; Comprise that the material of advancing nail from the greater trochanter summit is themain nail 1 of medical stainless steel or titanium alloy; Near section diameter ofmain nail 1 is 16mm, diminishes to far-end, and section diameter far away is 10mm; Main nail length is 170mm; Have 6 ° of outer drift angles betweenmain nail 1 anterior view nearly section axis and the section axis far away,main nail 1 is provided with near sectionfirst pinning 2 that material is medical stainless steel or titanium alloy, nearly sectionsecond pinning 3 anddistal locking nail 4 from top to bottom successively, and nearly section first pinning 2 axial lines are vertical each other with 1 near section axial line of main nail; Angle is 150 ° between nearly section second pinning, 3 axial lines and 1 far away section axial line of main nail;Main nail 1 norma lateralis offers near section firstcircular hole 11, nearly section secondcircular hole 12 and sectiontuning fork structure 13 far away from top to bottom successively, and its three axle center all onmain nail 1 lateral centrage, is plugged with far awaysection pinning 4 in the sectiontuning fork structure 13 far away; Nearly sectionsecond pinning 3 passes near section secondcircular hole 12 ofmain nail 1 nearly section; The middle front part of nearly sectionsecond pinning 3 offers the second pinningcircular hole 31, and nearly section firstpinning 2 passes near section firstcircular hole 11 and the second pinningcircular hole 31 respectively, and nearly sectionfirst pinning 2, nearly sectionsecond pinning 3 and main nail form triangular structure for 1 near section in the femur head and neck; Increase fixation stability property, nearly section first pinning, 2 axial lines and nearly sectionsecond pinning 3 axial lines are 5cm in the distance between on 1 far away section axial line of main nail; Nearly section second pinning 3 axial lines and 1 far away section axial line intersection point of main nail near sectionsecond pinning 3 the second pinning circular hole, 31 distances of shaft centers from being 6cm; Distance is 2cm between nearly section first pinning, 2 axis and themain nail 1 near-end summit.

Like Fig. 4 and near end of thighbone triangle intramedullary pin shown in Figure 5; The middle front part of nearly sectionsecond pinning 3 is offered the second pinningcircular hole 31; The distance of the second pinning circular hole, 31 distance of shaft centers tail ends is 75mm, between the second pinning circular hole, 31 axial lines and nearly section second pinning 3 axial lines 54 ° angle is arranged, and nearly sectionsecond pinning 3 diameters are 12mm; In nearly sectionsecond pinning 3 front portions is screw thread or screw blade structure, and tail end offers groove and is telescopic female thread structure.

Near end of thighbone triangle intramedullary pin as shown in Figure 6, nearly section first pinning 2 front portions are screw thread or flight structure, and tail end is interior hexagonal structure, and its length is 70～100mm, and diameter is 7mm.

Near end of thighbone triangle intramedullary pin as shown in Figure 7, section pinning far away 4 front portions are the full thread structure, and tail end is interior hexagonal structure, and its length is 30～50mm, and diameter is 4.5mm.

The method for using of the near end of thighbone triangle intramedullary pin of this utility model:main nail 1 earlier from from the femoral greater trochanter summit after the far-end pulp cavity inserts; C arm machine perspective upper/lower positions is good; The outer guider of percutaneous is screwed near sectionsecond pinning 3 through near section secondcircular hole 12 to neck of femur; When the second pinningcircular hole 31 near sectionsecond pinning 3 during on same plane, is screwed near section firstpinning 2 through nearly section firstcircular hole 11 with nearly section firstcircular hole 11, this nearly section firstpinning 2 is simultaneously through the second pinningcircular hole 31; This moment,main nail 1, nearly section firstpinning 2, nearly sectionsecond pinning 3 constituted triangle near end of thighbone; In the far away sectiontuning fork structure 13 of section pinning 4 far away throughmain nail 1 section far away, if the upper limb that section pinning 4 far away is close to far away sectiontuning fork structure 13 is the static(al) locking, the upper limb that leaves far away sectiontuning fork structure 13 is the power pinning.

With above-mentioned desirable embodiment according to this utility model is enlightenment, and through above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this utility model technological thought.The technical scope of this utility model is not limited to the content on the description, must confirm its technical scope according to the claim scope.

Claims (10)

1. near end of thighbone triangle intramedullary pin; It is characterized in that: comprise the main nail (1) that advances nail from the greater trochanter summit; Described main nail (1) is disposed with near section first pinning (2), nearly section second pinning (3) and section pinning (4) far away from top to bottom; Described main nail (1) norma lateralis offers near section first circular hole (11), nearly section second circular hole (12) and section tuning fork structure (13) far away from top to bottom successively; Its three axle center is all on main nail (1) lateral centrage; Be plugged with far away section pinning (4) in the described far away section tuning fork structure (13), described near section second pinning (3) passes near section second circular hole (12), and the front middle part of nearly section second pinning (3) offers the second pinning circular hole (31); Described near section first pinning (2) passes near section first circular hole (11) and the second pinning circular hole (31) respectively, and described near section first pinning (2), nearly section second pinning (3) and the nearly section of main nail (1) form triangular structure.

2. near end of thighbone triangle intramedullary pin according to claim 1 is characterized in that: have outer drift angle between described main nail (1) anterior view nearly section axis and the section axis far away, its outer drift angle angle is 5～7 °.

3. near end of thighbone triangle intramedullary pin according to claim 1 is characterized in that: have angle between described second pinning circular hole (31) axial line and nearly section second pinning (3) axial line, its angle is 45～55 °.

4. near end of thighbone triangle intramedullary pin according to claim 1 is characterized in that: described near section first circular hole (11) aperture is 6～8mm with nearly section first pinning (2) diameter; Nearly section second circular hole (12) aperture is 10～12mm with nearly section second pinning (3) diameter; Section tuning fork structure (13) spacing far away is 4～5mm; Near section diameter of main nail (1) is 15～17mm, and section diameter far away is 8～12mm.

5. near end of thighbone triangle intramedullary pin according to claim 1 is characterized in that: described near section first pinning (2) axial line is vertical each other with the nearly section of main nail (1) axial line, and its front portion is screw thread or screw blade structure, and tail end is interior hexagonal structure; Angle is 150 ° between described near section second pinning (3) axial line and main nail (1) the section far away axial line, and its front portion is screw thread or screw blade structure, and tail end offers groove and is telescopic female thread structure; Described far away section pinning (4) is the full thread structure, and its tail end is interior hexagonal structure.

6. near end of thighbone triangle intramedullary pin according to claim 1 is characterized in that: described near section first pinning (2) axial line and nearly section second pinning (3) axial line are 4～6cm in the distance between on main nail (1) the section far away axial line; Described near section second pinning (3) axial line with main nail (1) section far away axial line intersection point near section last second pinning circular hole (31) distance of shaft centers of second pinning (3) from being 5～7cm; Distance between described near section first pinning (2) axis and main nail (1) near-end summit is 1～3cm.

7. near end of thighbone triangle intramedullary pin according to claim 1 is characterized in that: described near section first pinning (2) length is 70～100mm, and nearly section second pinning (3) length is 80～120mm, and main nail (1) length is 170～320mm.

8. near end of thighbone triangle intramedullary pin according to claim 1 is characterized in that: the material that described near section first pinning (2), nearly section second pinning (3), section pinning (4) far away and main nail (1) all adopt is medical stainless steel or titanium alloy.

9. near end of thighbone triangle intramedullary pin according to claim 1 is characterized in that: described main nail (1), nearly section first pinning (2) and nearly section second pinning (3) are hollow-core construction, and section pinning far away (4) is solid nail.

10. near end of thighbone triangle intramedullary pin according to claim 1 is characterized in that: described main nail (1) near-end medial surface also is provided with screw thread and bayonet socket, and section far away pinning place in described main nail (1) section far away side is a tuning fork structure.

Images