CN202078383U - Internal fixator for pelvis - Google Patents
Internal fixator for pelvis Download PDFInfo
- Publication number
- CN202078383U CN202078383U CN2011201504816U CN201120150481U CN202078383U CN 202078383 U CN202078383 U CN 202078383U CN 2011201504816 U CN2011201504816 U CN 2011201504816U CN 201120150481 U CN201120150481 U CN 201120150481U CN 202078383 U CN202078383 U CN 202078383U
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- pelvis
- pipe box
- type pipe
- screw
- inner fixer
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Abstract
The utility model relates to an internal fixator for the pelvis, which consists of at least two internal fastening nails for the pelvis, a support rod and at least two fastening screw nuts. The internal fastening nail of the pelvis consists of a screw rod and a U-shaped pipe sleeve, and a full thread is arranged on the screw rod. The internal fixator for the pelvis has the following advantages: the operation procedures of the traditional internal fixation of fracture of the pelvis and the osteotomy correcting operation can be changed, so that the two operations are more convenient to operate; by using a nail-rod fixing system, the support rod can be bent freely, and the application range is widened; the support rod is not contacted with the pelvis directly, the blood supplied for the fracture part and the pelvis below the internal fixator can not be interfered, and the fracture healing is facilitated; the system is in angle fixation, the fixing effect is good, and the looseness due to the pulling of the screw and other possibilities can be avoided; the operation realizes the wiresoft by subcutaneous tunnel, the trauma is small, the bleeding amount is small, the recovery is rapid, and the complications can be reduced greatly.
Description
Technical field
This utility model relates to a kind of medical apparatus and instruments, specifically, is a kind of pelvis inner fixer.
Background technology
Fracture of pelvis is a kind of severe trauma, how by due to the extruding of direct violence pelvis.Be more common in vehicle accident and landslide.Then be firearm injury wartime.The fracture of pelvis wound is more than half with complication or multiple injury.The most serious is traumatic hemorrhagic shock, and the pelvic cavity viscera associated injury, and treatment is not as very high mortality rate.Fracture of pelvis accounts for nearly 3% of whole skeletal injuries.Adult's fracture of pelvis traumatogenic reason mainly comprises: collision of motor-driven vehicles, high falling and crush injury or the like.Adolescent patient fracture of pelvis incidence rate is lower, and greatly about 0.5%-7%, its reason of seeing at most is that motor vehicle accident, pedestrian are wounded by vehicle and high falling is hindered.Along with social development, the increase of unexpected injuries such as vehicle accident and industrial injury, the high-energy damage causes the fracture of pelvis incidence rate significantly increases, and wherein unstable fracture of pelvis accounts for 7-20%, serious threat patient life.The patients with pelvis fracture mortality rate is between 5-30%.The treatment of fracture of pelvis is emphasis and the difficult point that the orthopedist pays close attention to the patients with pelvis fracture emergency treatment treatment of hemodynamic instability especially always.
The patient of congenital dislocation of hip joint is congenital hip dysplasia, the change that is acetabular bone angle, the degree of depth causes acetabular bone can not fully cover femoral head, therefore increase with its age, the hip joint place stress concentration occurs and produces arthralgia, pelvis can be blocked in early days at PD, and the acetabular bone upset is fixing, acetabular bone is deepened, make femoral head and acetabular bone contact surface become big, and changed the cartilago acetabularis force part, reduce the speed of hip joint cartilage degeneration.The advantage of this operation is, do not need to carry out prosthetic replacement, because prosthetic replacement has infection risk, and approximately life cycle is 15 years; Significantly reduce medical expense in addition.
In fracture of pelvis internal fixation operation and the osteotomy orthopaedy, usually adopt steel plate that pelvis is fixed, the pitch of holes of steel plate is fixed, can not regulate voluntarily according to needs of patients, fixedly the time, need repeatedly pre-the placement to increase fixedly time, as the structural unstable shortcoming of the not good easy appearance of placement location, patient's clinical experience is had relatively high expectations; And usually need according to patient's pelvis structure steel plate to be carried out pre-bending fixedly the time, if pre-crook just in time is positioned at the screw place, then bend the rear bolt hole distortion, can not it use, and repeatedly later stage fracture possibility easily takes place in bending as fixing hole.The very big operative incision of fixedly needs of while general steel plate, and be close to fixed position after fixing, directly oppress pelvis easily, be unfavorable for that the patient recovers.The eighties in last century occurs using the pedicle nail technology and treat various spinal diseases, usually form by hold-down screw, hold-down bars and the fastening structure of band U type pipe box, and the spinal internal fixation system of progressively formation the whole series, but in view of spinal column and the structure of pelvis with fixedly require differently, the model and the structure of existing spinal column internal fixation device also is not suitable for fixing of pelvis.
Chinese patent literature CN:101601601A discloses a kind of dynamic spinal internal fixation system, this invention is made up of pitman, U type pedicle nail, lock-screw, bulb pedicle nail and stop screw, forms whole dynamic spinal internal fixation system by two groups of dynamic spinal pedicle nail groups.Chinese patent literature CN:201143228Y discloses a kind of spinal internal fixation nail rod, comprises uni-axial screws or multi-axial screws, hold-down bars, U type stern notch, inner bolt and cover medicated cap.Chinese patent literature CN:201356640Y discloses a kind of spinal fixation device, its structure comprises main shaft, everything screw and horizontal-associate device, 1-50 everything screw can be set on the main shaft, and two main shafts that are provided with the everything screw are fixed by the horizontal-associate device, and the horizontal-associate device axle on the horizontal-associate device is a bow-shaped structural.But the pelvis inner fixer of forming about the hold-down screw, hold-down bars and the fastening structure that adopt band U type pipe box yet there are no report.
Summary of the invention
The purpose of this utility model is that a kind of pelvis inner fixer is provided.
For achieving the above object, the technical scheme that this utility model is taked is: a kind of pelvis inner fixer, described pelvis inner fixer is made up of at least two pieces of pelvis internal fixation nails, a support stick and two clamp nuts at least, described pelvis internal fixation nail is made up of screw rod and U type pipe box, and described screw rod is provided with full thread.
The long 30-50mm of described screw rod, diameter 5.5-9.5mm.
The screw-internal thread fit of described clamp nut and U type pipe box is fixed on support stick in the U type pipe box.
Described U type pipe box has external screw thread.
Described U type pipe box top is provided with U type pipe box lengthening section, and the 1-5 that described U type pipe box lengthening section is a U type pipe box length times, two parts link to each other by cutting off groove, can U type pipe box lengthening section be removed along cutting off groove.
Described pelvis inner fixer also comprises adapter.
Described adapter is made up of adapter one, adapter two, holding screw and trip bolt, by holding screw fixed connector and support stick, by distance and fixed connector one and the adapter two between trip bolt adjusting support stick.
The centre endoporus of described clamp nut, holding screw and trip bolt can be hexagon, octagonal, quadrangle, triangle, in-line, cross, quincunx hole or groove.
This utility model advantage is:
1, changed the traditional fracture of pelvis internal fixation and the operating process of osteotomy orthopaedy, made these two operation techniques more simple; Use nail-bar fixed system, and support stick can arbitrarily bend the expansion range of application;
2, support stick does not directly contact with pelvis, can not disturb the blood confession of fracture and inner fixing device below pelvis, is more conducive to union of fracture;
3, this system is that the angle is fixed, good fixing effect, and avoiding screw to extract loosening the grade may;
4, operation can realize Wicresoft by hypodermic tunnel, and not only wound is little, goes out insufficiency of blood, recovers fast, and can also reduce complication significantly.
Description of drawings
Accompanying drawing 1 is the structural representation of a kind of pelvis inner fixer of this utility model.
Accompanying drawing 2 is STRUCTURE DECOMPOSITION sketch maps of a kind of pelvis inner fixer of this utility model.
Accompanying drawing 3 is plan views of the pelvis internal fixation nail of a kind of pelvis inner fixer of this utility model.
Accompanying drawing 4 is the structural representations that have the pelvis inner fixer external member of adapter.
Accompanying drawing 5 is STRUCTURE DECOMPOSITION sketch maps of pelvis inner fixer adapter.
Accompanying drawing 6 is assembling sketch maps of pelvis inner fixer adapter.
The specific embodiment
Below in conjunction with embodiment and with reference to accompanying drawing this utility model is further described.
The Reference numeral and the ingredient that relate in the accompanying drawing are as follows:
1. pelvis internal fixation nail 2. support sticks
3. clamp nut 4. adapters
11. screw rod 12.U type pipe box
121.U type pipe box lengthening section 122. arcuate grooves
123. external screw thread 124. female threads
125. cut off groove 31. clamp nut endoporus
41. adapter one 42. adapters two
43. holding screw 44. trip bolts
411. holding screw screw 412. adapters connect screw
421. adapter connects the duct
Please refer to accompanying drawing 1, accompanying drawing 1 is the structural representation of a kind of pelvis inner fixer of this utility model.Described pelvis inner fixer is made up of pelvis internal fixation nail 1, support stick 2 and clamp nut 3, and every group of inner fixer should comprise two pieces of pelvis internal fixation nails 1, support stick 1 and two clamp nuts 3 at least when operation was used.
Please refer to accompanying drawing 2, accompanying drawing 2 is STRUCTURE DECOMPOSITION sketch maps of a kind of pelvis inner fixer of this utility model.Described pelvis internal fixation nail 1 is made up of screw rod 11 and U type pipe box 12, described screw rod 11 long 30-50mm, and diameter 5.5-9.5mm is provided with full thread outside the screw rod 11, passes straight through to screw rod 11 tops, and similar is in the os integumentale screw lower end of full thread screw rod.Pelvis internal fixation nail 1 structure is similar to vertebral pedicle bolt structure commonly used, but being to use pedicle screw can not carry out pelvis fixes, because LOCATION OF PEDICLE SCREW FIXATION is in vertebral body, in the vertebral body is spongy bone, so pedicle screw lower end screw rod is similar to cancellous bone screw, and pelvis is cortical bone-spongy bone-cortical bone structure, as fixedly securing, this three-decker all need be penetrated just has hold preferably, therefore needs the screw rod of the present utility model 11 of similar os integumentale screw fixing.
Described U type pipe box 12 is the spacious logical hollow pipe boxes in a top, the bottom sealing fuses with screw rod 11 heads, be provided with one and traverse the arcuate groove 122 of bottom, please refer to accompanying drawing 3, accompanying drawing 3 is plan views of the pelvis internal fixation nail of a kind of pelvis inner fixer of this utility model, as shown in Figure 3, the width b of arcuate groove is 5.5-6.5mm, and is identical with the diameter of support stick 2.This arcuate groove 122 is divided into corresponding two arcwalls with female thread 124 with the tube wall of hollow pipe box, and the outside of these two arcwalls also all is provided with external screw thread 123.Operation for convenience, described U type pipe box 12 tops can be provided with U type pipe box lengthening section 121, U type pipe box lengthening section 121 is generally 1-5 times of U type pipe box 12 length, two parts link to each other by cutting off groove 125, cutting off groove 125 is to cut tube wall thin or pass through the some ways of connecting to connect a lengthening section, can U type pipe box lengthening section 121 be removed along cut-out groove 125 before operation finishes.
Described support stick 2 is elongated solid cylindrical metallic rod, long 100-200mm, and diameter 5.5-6.5mm has certain flexibility, can carry out pre-bending according to patient's pelvis shape, and the shape that can be maintained fixed after the pre-bending simultaneously reaches the effect of support.Support stick 2 can be placed on by the upper end open place of U type pipe box 12 on the arcuate groove 122, perhaps directly pierces in the U type pipe box 12 by arcuate groove 122.Described support stick 2 is placed in the arcuate groove 122 of U type pipe box 12 and after determining good relative position, can be with clamp nut 3 by female thread 124 precession U type pipe boxes 12, by the frictional force realization support stick 2 of clamp nut 3 and support stick 2 and arcuate groove 122 and fixing of pelvis internal fixation nail 1.After described clamp nut 3 was tightened and fixed support stick 2, cut-out groove 125 places that it highly can not surpass U type pipe box 12 made that clamp nut 3 upper ends can not given prominence to outside U type pipe box 12 behind the removal U type pipe box lengthening section 121.Described clamp nut 3 centres are clamp nut endoporus 31, and the trip bolt endoporus 31 that shows among Fig. 2 is hexagon, can also be octagonal, quadrangle, triangle, in-line, cross, quincunx hole or groove.
Need to prove that every group of inner fixer should comprise two pieces of pelvis internal fixation nails 1, support stick 1 and two clamp nuts 3 at least when operation was used, and as shown in Figure 1, also can increase many pieces of pelvis internal fixation nails 1 and clamp nut 3 on same support stick.When the structure of a support stick 2 can not play good fixation, can increase a support stick 2 and corresponding pelvis internal fixation nail 1.Please refer to accompanying drawing 4, accompanying drawing 4 is the structural representations that have the pelvis inner fixer external member of adapter.As shown in Figure 4, when two support sticks 2 are parallel placement, can be connected and fixed with adapter 4 between two support sticks 2, can improve the stability of whole fixed system after the use.Please refer to accompanying drawing 5, accompanying drawing 5 is STRUCTURE DECOMPOSITION sketch maps of pelvis inner fixer adapter.Described adapter is made up of adapter 1, adapter 2 42, holding screw 43 and trip bolt 44.Described adapter 1 and adapter 2 42 all are hook, are made up of flat segments and bending section, and the curved surface diameter of bending section is identical with support stick 2 diameters, is used to catch on support stick 2.Respectively be provided with a holding screw screw 411 near on the bending section on described adapter 1 and the adapter 2 42, the flat segments end of adapter 1 is provided with a connector and connects screw 412, and the flat segments end of adapter 2 42 is provided with an oblong adapter and connects duct 421.Please refer to accompanying drawing 5, accompanying drawing 5 is assembling sketch maps of pelvis inner fixer adapter.During assembling, the bending section of adapter 1 and adapter 2 42 is stuck on two support sticks 2, tighten two holding screws 43, the plane that makes the lower end of holding screw 43 stretch out adapter 4, support stick 2 is blocked in the lower end of holding screw 43, thereby play the effect of fixed connector 4 and support stick 2, please refer to accompanying drawing 6 figure below, accompanying drawing 6 figure below are adapter stationary state cutaway views.Adjust the relative position of adapter 1 and adapter 2 42, tighten trip bolt 44, thereby fix two parts of adapter 4.The centre of described holding screw 43 and trip bolt 44 can be hexagon, octagonal, quadrangle, triangle, in-line, cross, quincunx hole or groove.
Need to prove, when carrying out the pelvis fixing operation, at first pelvis internal fixation nail 1 is separately fixed on the fixed skeleton that to reset, supporting resetting means is installed, resetting means and inner fixer connecting portion are a tapped pipe box, the resetting means pipe box is enclosed within on the U type pipe box 12 of pelvis internal fixation nail 1, external screw thread 123 by pelvis internal fixation nail 1 be tightened (being screwed into U type pipe box 12 bottoms), make bone reduction by pulling adjustment resetting means drive pelvis internal fixation nail 1, external fixator is fixed on desired location, skeleton characteristics pre-bending support stick 2 according to the patient, and support stick 2 passed U type pipe box 12, tool using passes external fixator pipe box inside, in pipe box inside clamp nut 3 is screwed, and it is fixing with pelvis internal fixation nail 1 to be about to support stick 2.As a plurality of support sticks 2 have been adopted, mounted connector 4 at this moment then.After inner fixer fixes, resetting means is removed, along cutting off groove 125 U type pipe box lengthening section 121 is removed, can fix whole skeleton inner fixer by folding nail device.
Concrete operation process:
1) at first, cuts skin, subcutaneous tissue, muscle etc., will need fixed pelvis to appear.
2) on the pelvis of fracture line both sides or both sides, pre-osteotomy place, vertically respectively be screwed into 1 piece of pelvis internal fixation nail 1 of appropriate length respectively.The U-shaped outside of sleeve is tightened T shape and is lifted resetting means (not adding explanation in this patent) on staple.
3) when being operating as osteotomy, need above acetabular bone, pelvis to be blocked, and homonymy pubic branch and ramus of ischium are blocked, be convenient to the upset of acetabular bone top and correct; When being operating as fracture incision fixation, only needing exposure to intend fixed position and get final product.
4) use resetting means, by lift, method such as rotation, with fracture of pelvis the acetabular bone top outward turning after maybe will blocking etc. that resets, make acetabular bone obtain the satisfied degree of depth; And tighten each parts of resetting means, make pelvis temporary fixed.
5) on two pieces of pelvis internal fixation nail 1 lines of predetermined fixed, respectively be screwed into 0-3 piece of pelvis internal fixation nail 1(and can avoid the 2 excessive bendings of later stage support stick in fracture or osteotomy line both sides again).
6) whether by pre-bending device support stick 2 is bent into satisfied shape, puts into all U-shaped sleeve pipes 12, it is docile with each U-shaped sleeve pipe 12 to observe support stick 2.
7) by the resetting means of hollow, built-in clamp nut 3 and support stick 2 are locked.Tighten the interface of all clamp nuts 3 and support stick 2 successively.
8) resetting means is removed, U type pipe box lengthening section 121 unnecessary on the pelvis internal fixation nail 1 is fractureed and remove along cutting off groove 125 by folding nail device.
9) as fixing dissatisfied, can be according to capable again another group fixture of said method.
10) simultaneously, can two groups of fixtures be connected, increase its fix tightly soundness by adapter 4.
11) layer-by-layer suture.Art finishes.
The above only is a preferred implementation of the present 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 principle; can also make some improvement and replenish, these improvement and replenish and also should be considered as protection domain of the present utility model.
Claims (8)
1. pelvis inner fixer, it is characterized in that, described pelvis inner fixer is made up of at least two pieces of pelvis internal fixation nails, a support stick and two clamp nuts at least, and described pelvis internal fixation nail is made up of screw rod and U type pipe box, and described screw rod is provided with full thread.
2. pelvis inner fixer according to claim 1 is characterized in that, the long 30-50mm of described screw rod, diameter 5.5-9.5mm.
3. pelvis inner fixer according to claim 1 is characterized in that, the screw-internal thread fit of described clamp nut and U type pipe box is fixed on support stick in the U type pipe box.
4. pelvis inner fixer according to claim 1 is characterized in that, described U type pipe box has external screw thread, is convenient to the use of auxiliary resetting means.
5. pelvis inner fixer according to claim 1, it is characterized in that described U type pipe box top is provided with U type pipe box lengthening section, the 1-5 that described U type pipe box lengthening section is a U type pipe box length doubly, two parts link to each other by cutting off groove, can U type pipe box lengthening section be removed along cutting off groove.
6. pelvis inner fixer according to claim 1 is characterized in that, described pelvis inner fixer also comprises adapter.
7. pelvis inner fixer according to claim 5, it is characterized in that, described adapter is made up of adapter one, adapter two, holding screw and trip bolt, by holding screw fixed connector and support stick, by distance and fixed connector one and the adapter two between trip bolt adjusting support stick.
8. pelvis inner fixer according to claim 1, it is characterized in that the centre endoporus of described clamp nut, holding screw and trip bolt can be hexagon, octagonal, quadrangle, triangle, in-line, cross, quincunx hole or groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201504816U CN202078383U (en) | 2011-05-12 | 2011-05-12 | Internal fixator for pelvis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201504816U CN202078383U (en) | 2011-05-12 | 2011-05-12 | Internal fixator for pelvis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202078383U true CN202078383U (en) | 2011-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201504816U Expired - Fee Related CN202078383U (en) | 2011-05-12 | 2011-05-12 | Internal fixator for pelvis |
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| Country | Link |
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| CN (1) | CN202078383U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102178557A (en) * | 2011-05-12 | 2011-09-14 | 上海市第六人民医院 | Pelvic internal fixation unit and application thereof |
| CN103908330A (en) * | 2014-03-31 | 2014-07-09 | 广州医科大学附属第一医院 | Self-guide long-arm solid percutaneous pedicle screw |
| CN105125265A (en) * | 2015-07-14 | 2015-12-09 | 屈波 | Fixing method for pelvic posterior ring fracture and fixing device for pelvic posterior ring fracture |
| CN105943143A (en) * | 2016-06-30 | 2016-09-21 | 山东威高骨科材料股份有限公司 | Reduction and internal fixation device for injury of lumbar vertebra, sacrum and ilium pelvis |
-
2011
- 2011-05-12 CN CN2011201504816U patent/CN202078383U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102178557A (en) * | 2011-05-12 | 2011-09-14 | 上海市第六人民医院 | Pelvic internal fixation unit and application thereof |
| CN102178557B (en) * | 2011-05-12 | 2013-01-23 | 上海市第六人民医院 | Pelvic internal fixation unit and application thereof |
| CN103908330A (en) * | 2014-03-31 | 2014-07-09 | 广州医科大学附属第一医院 | Self-guide long-arm solid percutaneous pedicle screw |
| CN105125265A (en) * | 2015-07-14 | 2015-12-09 | 屈波 | Fixing method for pelvic posterior ring fracture and fixing device for pelvic posterior ring fracture |
| CN105943143A (en) * | 2016-06-30 | 2016-09-21 | 山东威高骨科材料股份有限公司 | Reduction and internal fixation device for injury of lumbar vertebra, sacrum and ilium pelvis |
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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: 20111221 Termination date: 20120512 |