CN201551383U - Automatic pressurizing interlocking intramedullary nail - Google Patents
Automatic pressurizing interlocking intramedullary nail Download PDFInfo
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- CN201551383U CN201551383U CN2009201282917U CN200920128291U CN201551383U CN 201551383 U CN201551383 U CN 201551383U CN 2009201282917 U CN2009201282917 U CN 2009201282917U CN 200920128291 U CN200920128291 U CN 200920128291U CN 201551383 U CN201551383 U CN 201551383U
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- interlocking
- pressurizing
- fracture
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Abstract
The utility model provides an automatic pressurizing interlocking intramedullary nail which comprises a main nail, a pressurizing spring, a pressurizing screw, interlocking holes, interlocking nails and a biological artificial bone material, wherein a remote end of the main nail is radially provided with two interlocking holes, and two interlocking nails respectively and radially pass through the two interlocking holes to be fixed with the remote end of fracture; a near end of the main nail is provided with an outer pressurizing slotted hole which runs through radially, and the head of the near end is provided with a threaded hole; the outer pressurizing slotted hole is internally provided with the biological artificial bone material which is positioned among inner convex rings formed on the wall of a through hole at the lower surface of the interlocking nails and the lower end of the outer pressurizing slotted hole; the length of the biological artificial bone material is equivalent to the pressurizing micro-momentum needed by the fracture end; the pressurizing spring is pressed on the interlocking nails; and the pressurizing screw is pressed on the pressurizing spring. By adopting the automatic pressurizing interlocking intramedullary nail, the absorbable biological artificial bone material and the pre-pressing spring are added on the interlocking nails at the near end of the interlocking intramedullary nail, and the gradual absorption of the biological artificial bone is utilized to lead the pre-pressing spring stretch, so that the interlocking nails at the near end is pressurized, and pressure is transmitted to the fracture end by mechanical transmission so as to realize pressurizing micro-motion of the fracture end.
Description
Technical field
This utility model relates to a kind of medical apparatus and instruments, mainly apply to orthopaedic trauma treatment long bone of limbs fracture, as inside-fixture---automatic pressurization interlocking medullary needle internal fixation systems such as fracture of shaft of femur, fracture of shaft of tibia, humeral shaft fracture, and employed device, apparatus in fixing operation mode and the art.
Background technology
It is the commonly encountered diseases and the frequently-occurring disease of orthopaedic trauma that long bone of limbs is done fracture, and present therapeutic modality is divided into to be guarded and two kinds of operative treatments.Expectant treatment mainly refers to manual reduction, and operative treatment comprises open reduction internal fixation, external fixer fixation and intramedullary nailing etc., the purpose of each therapeutic modality all is to recover the line of force of fracture end as early as possible, and to line and para-position, strive for union of fracture, but can be perfect in every way without any a kind of mode, therefore, select the indication of operation just to seem particularly important.Since nineteen thirty-nine Germany professor G.Kuntscher designs, uses the intramedullary nail treatment fracture of shaft of femur first, for countless fracture patient has brought rehabilitation.Fixing interlocking intramedullary nail has the fracture of preventing and rotates, and keeps the length of bone, and vertical pressurization is arranged, and internal fixation is firm, and stability is high, does not need external fixation etc., can carry out hip, knee joint, ankle joint function exercise in early days, prevents joint function disturbance; Secondly operative incision is little, does not peel off periosteum when fracture is multiple, has reduced the destruction of fracture residual blood confession, makes union of fracture fast, reduces infection rate, shortens healing time, improves cure rate; In addition, when getting internal fixation after the union of fracture, plurality of advantages such as simple to operate has won attracting attention of outer scientific cirle, and has constantly been developed and extensive use.But in clinical use, we find that also its main shortcoming is effectively to pressurize to the fracture site agglutination, shorten the fracture site gap, may cause fracture delayed union or bone does not connect incidence rate higher, fixedly the delayed union or the disunion incidence rate of long bone fracture can reach 6.8%-21.4% according to domestic and foreign literature report fixing interlocking intramedullary nail, effectively realize the pressurization of fracture site, and the fine motion in the realization agglutination promotes growth of spur just to become one of the difficult point that must solve of fixing interlocking intramedullary nail treatment long bone fracture and key technology.
Traditional long bone of limbs fracture operation has manual reduction, open reduction internal fixation, external fixer fixation and intramedullary nailing etc., sketches with regard to common fixing interlocking intramedullary nail herein.The 1st generation intramedullary needle be representative with the rustless steel cloverleaf structure intramedullary needle of professor G.Kuntscher design, because can not lock, anti-rotation performance is poor, stability relies on fracture site to embed and operate relatively more tired energy mutually, add that the intramedullary needle manufacturing process is coarse, and the scope of application is extremely limited and superseded.At present widely used various fixing interlocking intramedullary nails belong to the 2nd generation product.Be characterized in having lock function, fuse, the stability of fracture fixation is provided, be applicable to comminuted shaft fracture treatment by intramedullary needle, bone and lock screw.
In use still there are a lot of problems in traditional common fixing interlocking intramedullary nail fixed system, if can cause malunion of fracture or bone does not connect etc.Joshi etc. followed up a case by regular visits to 56 routine fixing interlocking intramedullary nail treatment open tibial fracture nearly 2 years, and delayed union takes place 6 examples, 6 routine infectious bone does not connects, and the main nail fracture of 2 examples, 8 routine pinning fractures, fracture delayed union and bone does not connect incidence rate are 21.4%.The problems such as the reason that fracture delayed union or bone does not connect take place here is undesirable except infection control, soft tissue embeds and the operation technique skill is not in place, what is more important, common intramedullary needle can't be realized the fracture site pressurization, makes fracture site separate, and influences union of fracture.Promptly allow to realize the fracture end pressurization, also must take out screw realization activity pressurization, increase the weight of patient's pain and financial burden by modus operandi.
Summary of the invention
This utility model will be on the basis of original common fixing interlocking intramedullary nail, use modern biomaterial to learn a skill, bio-artificial bone and traditional fixing interlocking intramedullary nail science are combined, add absorbable biological artificial bone and pre-compressed spring at fixing interlocking intramedullary nail near-end pinning place, utilize the absorption gradually of bio-artificial bone, make pre-compressed spring stretch, enforcement is to the pressurization of near-end pinning, and, pressure is transmitted to fracture end by the mechanics conduction, realize the pressurization fine motion of fracture end.
The technical solution of the utility model is as follows:
A kind of automatic pressurization interlocking medullary needle that is used for orthopaedics therapy, it includes main pin (1), pressing spring (4), pressurization screw rod (5), interlocking hole (6) and self-locking nail (3); Described main pin (1) has the angle of bend according to the physiology angle decision of long bone of limbs, femoral shaft bone, shin diaphyseal bone or upper arm diaphyseal bone, and there is through hole at the center; Described main pin (1) distal radial has two interlocking holes (6), is radially passed respectively with the far-end of fracturing by two self-locking nails and fixes; The near-end of described main pin (1) has the outer pressurized tank hole (8) that radially connects, and the proximal head of main pin (1) is screwed hole (9); Be horizontally through outer pressurization self-locking nail (3) in the described outer pressurized tank hole (8), pressing spring (4) is packed into from the near-end of main pin (1) in the main pin (1), be pressed on the self-locking nail (3), pressurization screw rod (5) is screwed in by the proximal head screwed hole of main pin (1), is pressed on the pressing spring (4);
Improvement of the present utility model is, bio-artificial bone material (2) is set in pressurized tank hole (8) outside described, lower surface and outer pressurized tank hole (8) lower end position that bio-artificial bone material (2) is positioned at self-locking nail (3) are between the internal projecting ring (7) that forms on the through-hole wall, the required pressurization fine motion amount of the length of described bio-artificial bone material (2) and fracture end is suitable, and normal length is 2-3mm.
This utility model is primarily aimed at common fixing interlocking intramedullary nail can not realize the postoperative pressurization, the shortcoming that motorization is loaded down with trivial details and designing, its innovative point is to fill out in advance the degradable biological artificial bone in the intramedullary needle side channel, and redesigned the lock screw order of fixing interlocking intramedullary nail near-end, absorb by the dissolving gradually in vivo that utilizes the bio-artificial bone, implement the automatic pressurization of fracture site, fundamentally solved the problem that to pressurize automatically after the long bone of limbs fracture fixation, and the fine motion stress in the realization fracture healing process is regulated, can effectively reduce the post-operative complication of fixing interlocking intramedullary nail, reduce the incidence rate of postoperative fracture delayed union or bone does not connect, improve therapeutic effect and satisfaction.
Adopt this utility model, can design the intramedullary needle that can pressurize automatically of different size, emphasis solves the long bone of limbs fracture surgery and realizes axially fine motion pressurization automatically of fracture site, promotes growth of spur, thereby at utmost improves surgical result and satisfaction.
Description of drawings
Fig. 1 is the contour structures sketch map of this fixing interlocking intramedullary nail;
Fig. 2 is the cross-sectional view of this fixing interlocking intramedullary nail;
Fig. 3 is the cross-sectional view of the main pin near-end of this fixing interlocking intramedullary nail;
Fig. 4 is the interior cross-sectional view for parts such as installation pressing spring of the main pin near-end of this fixing interlocking intramedullary nail;
The specific embodiment
Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, this automatic pressurization interlocking medullary needle includes main pin 1, pressing spring 4, pressurization screw rod 5, two interlocking holes 6, one section outer pressurized tank hole 8, three self-locking nails 3 and save degradable biological artificial bone 2.Wherein, main pin 1 has the angle of bend according to the physiology angle decision of long bone of limbs, femoral shaft bone, shin diaphyseal bone or upper arm diaphyseal bone, and main pin center has through hole.Distal radial at main pin 1 has two interlocking holes 6, and during use, two self-locking nails 3 radially pass interlocking hole 6 respectively and fix with the fracture far-end.The near-end of main pin 1 has one section outer pressurized tank hole 8 that radially connects, and the proximal head of main pin 1 is a screwed hole 9.A joint degradable artificial bone material 2 is preset in pressurize the outside bottom of slotted eye 8, in order to guarantee the position of bio-artificial bone material 2 in groove, can pressurize outside and be formed with a circle internal projecting ring 7 on the through-hole wall at slotted eye 8 lower end position places, to hold the lower end of bio-artificial bone material 2, make it not to lower slider.Be used for being horizontally through outer pressurized tank hole 8 with the fixed self-locking nail 3 of fracture near-end, be pressed on the artificial bone 2, pressing spring 4 is packed into from the near-end of main pin 1 in the main pin, and the lower end is pressed on the outer pressurization self-locking nail 3, pressurization screw rod 5 is screwed in by the screwed hole of the head of main pin 1, is pressed on the pressing spring 4.
The length of the bio-artificial bone material 2 that this utility model adopts should be suitable with the required pressurization fine motion amount of fracture end, and normal length is 2-3mm.And adoptable existing various degradable biological artificial bones, as calcium sulfate, the hydroxyapatite of common employing, perhaps Dicon AS's poly-meso lactic acid of producing or the like.
The occupation mode (is example with the fracture of shaft of femur) of this fixing interlocking intramedullary nail below is described:
1. make Ipsilateral buttocks posterior incisions and be about 2cm
2. passivity is separated to piriformis fossa, touches neck of femur front and back cortex with thumb, first finger, and inclined to one side slightly therein rear is close to the greater trochanter inboard and is determined into the nail point.
With sharp vertebra going into the punching of nail point, penetrate cortical bone.
4. take advantage of a situation and put into guide pin, pass the fractured near end end.
5. in the fracture end level, big leg outer side is made 3-5cm, otch, and separating muscle touches the fracture end guide pin, and auxiliary its enters fracture far-end pulp cavity, reservation guide pin.
6. according to the pulp cavity internal diameter of measuring before the art, select suitable fixing interlocking intramedullary nail (be this utility model, preset bio-artificial bone material 2).
7. select to expand marrow than changeing in the marrow of selecting the big 1mm of intramedullary needle diameter for use.
8. be driven into selected fixing interlocking intramedullary nail along guide pin.
9. determine the fracture distal lockhole exactly by sight earlier, order withdraws from guide pin, and screws in the 1st piece of self-locking nail by first interlocking hole 6 of far-end.
10. determine and screw-in the 2nd piece of self-locking nail of far-end and 1 piece of self-locking nail 3 of near-end according to said process, remove sight.
11. put into pressing spring 4 at last, screw in pressurization screw rod 5 and pressurization.
12. successively close wound.
13. art finishes.
14. postoperative utilizes the absorption gradually of bio-artificial bone, implements the automatic pressurization of fracture site.4th, 8,12,24 weeks only need requirement patient periodic review X-ray sheet, determine growth of spur and the tree-like situation of fracture, need not operation and take out hold-down screw.
Claims (2)
1. automatic pressurization interlocking medullary needle, it includes main pin (1), pressing spring (4), pressurization screw rod (5), interlocking hole (6) and self-locking nail (3); Described main pin (1) has the angle of bend according to the physiology angle decision of long bone of limbs, femoral shaft bone, shin diaphyseal bone or upper arm diaphyseal bone, and there is through hole at the center; Described main pin (1) distal radial has two interlocking holes (6), is radially passed respectively with the far-end of fracturing by two self-locking nails and fixes; The near-end of described main pin (1) has the outer pressurized tank hole (8) that radially connects, and the proximal head of main pin (1) is screwed hole (9); Be horizontally through outer pressurization self-locking nail (3) in the described outer pressurized tank hole (8), pressing spring (4) is packed into from the near-end of main pin (1) in the main pin (1), be pressed on the self-locking nail (3), pressurization screw rod (5) is screwed in by the proximal head screwed hole of main pin (1), is pressed on the pressing spring (4);
It is characterized in that: bio-artificial bone material (2) is set in pressurized tank hole (8) outside described, lower surface and outer pressurized tank hole (8) lower end position that bio-artificial bone material (2) is positioned at self-locking nail (3) are between the internal projecting ring (7) that forms on the through-hole wall, and the required pressurization fine motion amount of the length of described bio-artificial bone material (2) and fracture end is suitable.
2. a kind of automatic pressurization interlocking medullary needle according to claim 1 is characterized in that, the length of described bio-artificial bone material (2) is 2-3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201282917U CN201551383U (en) | 2009-08-03 | 2009-08-03 | Automatic pressurizing interlocking intramedullary nail |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201282917U CN201551383U (en) | 2009-08-03 | 2009-08-03 | Automatic pressurizing interlocking intramedullary nail |
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| CN201551383U true CN201551383U (en) | 2010-08-18 |
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| CN2009201282917U Expired - Fee Related CN201551383U (en) | 2009-08-03 | 2009-08-03 | Automatic pressurizing interlocking intramedullary nail |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102813564A (en) * | 2012-08-23 | 2012-12-12 | 中国人民解放军第四军医大学 | Titanium alloy artificial bone/intramedullary nail compression fixation system and preparation method thereof |
| CN112294412A (en) * | 2020-10-29 | 2021-02-02 | 江苏安格尔医疗器械有限公司 | Humerus multidimensional locking intramedullary nail |
-
2009
- 2009-08-03 CN CN2009201282917U patent/CN201551383U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102813564A (en) * | 2012-08-23 | 2012-12-12 | 中国人民解放军第四军医大学 | Titanium alloy artificial bone/intramedullary nail compression fixation system and preparation method thereof |
| CN102813564B (en) * | 2012-08-23 | 2015-12-09 | 中国人民解放军第四军医大学 | A kind of preparation method of titanium alloy artificial bone/intramedullary nail compression fixation system |
| CN112294412A (en) * | 2020-10-29 | 2021-02-02 | 江苏安格尔医疗器械有限公司 | Humerus multidimensional locking intramedullary nail |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100818 Termination date: 20130803 |