CN220655627U - Adjustable retrograde intramedullary nail positioning split trephine - Google Patents
Adjustable retrograde intramedullary nail positioning split trephine Download PDFInfo
- Publication number
- CN220655627U CN220655627U CN202321364884.XU CN202321364884U CN220655627U CN 220655627 U CN220655627 U CN 220655627U CN 202321364884 U CN202321364884 U CN 202321364884U CN 220655627 U CN220655627 U CN 220655627U
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- CN
- China
- Prior art keywords
- drill pipe
- intramedullary nail
- inner core
- adjustable
- retrograde intramedullary
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 241000425571 Trepanes Species 0.000 claims abstract description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 8
- 206010017076 Fracture Diseases 0.000 abstract description 6
- 210000000689 upper leg Anatomy 0.000 abstract description 5
- 206010016454 Femur fracture Diseases 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 238000001125 extrusion Methods 0.000 abstract description 4
- 210000000988 bone and bone Anatomy 0.000 description 7
- 208000010392 Bone Fractures Diseases 0.000 description 5
- 238000005553 drilling Methods 0.000 description 5
- 210000000426 patellar ligament Anatomy 0.000 description 4
- 239000012634 fragment Substances 0.000 description 3
- 210000000629 knee joint Anatomy 0.000 description 3
- 208000008924 Femoral Fractures Diseases 0.000 description 2
- 208000019155 Radiation injury Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000845 cartilage Anatomy 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 210000000501 femur body Anatomy 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 210000003041 ligament Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Surgical Instruments (AREA)
Abstract
The utility model provides an adjustable retrograde intramedullary nail location split trepan, includes the drill pipe, and the detachable inner core that is provided with in the drill pipe, drill pipe one end are equipped with the sawtooth, and other one end fixedly connected with handle has offered a plurality of guiding holes on the inner core. The utility model does not generate extrusion effect in the annular sawing process, does not cause the loss of reduction of the intercondylar fracture of the femur, and can expand the indication of the retrograde intramedullary nail to the distal femur fracture of AO/OTA C3 type.
Description
Technical Field
The utility model relates to an adjustable retrograde intramedullary nail positioning open trephine.
Background
The retrograde interlocking intramedullary nail can be used for distal femur fracture of AO/OTA A A, C1 or C2, femoral fracture below the isthmus of femur, femoral shaft, supracondylar femoral fracture, intercondylar fracture and steel plate fixation failure person within 20CM of the knee joint. The method comprises the following steps: the standard midline longitudinal skin incision or the medial patellar side incision, the patellar ligament is split by the longitudinal row, or the patellar ligament is retracted to the outer side after the scissors are acutely separated on the medial side of the patellar ligament, and the patellar ligament enters the joint cavity to determine the nailing point. And driving a pressurizing thread guide needle corresponding to the long shaft of the femur in front of the upper dead center of the rear crossed ligament. Under the X-ray, the side image indicates a nail-in point by using an intercondylar fossa cortex line (Blumensaat line), the nail-in point is positioned in front of the tail end of the Blumessaat line, and is aligned with the central axes of the anterior and posterior femoral stems, and the nail-in point is positioned at the center of the intercondylar fossa in the anterior and posterior positions.
Before the intramedullary nail guide pin is placed into the intramedullary nail to expand the marrow, a bone reamer or a marrow expanding drill is conventionally used for completing the treatment of the intercondylar space of the femur to adapt to the proximal placement of the retrograde intramedullary nail. Drilling in this way has the following disadvantages: 1. the extrusion effect in the drilling process can possibly cause the increase of the displacement of the fracture end of the intercondylar fracture and the loss of the reduction; 2. in the process of drilling or reaming, partial bone fragments enter the joint cavity, and if the bone fragments are not completely cleaned, a knee joint free body is formed, so that the joint cartilage is damaged, pain is caused, and joint movement is limited; 3. if the positioning of the pressurized threaded guide needle is inaccurate, the needle insertion point and the angle are required to be adjusted through multiple perspective positioning, so that the radiation damage caused by the patient perspective is increased, and the operation time is prolonged.
Disclosure of Invention
The utility model mainly solves the technical problem of providing the adjustable retrograde intramedullary nail positioning opening trepan, which does not generate extrusion effect in the annular sawing process, does not cause the loss of reduction of the intercondylar fracture of femur, and can expand the indication of the retrograde intramedullary nail to the distal femur fracture of AO/OTA C3.
In order to solve the problems, the technical scheme of the utility model is as follows:
the utility model provides an adjustable retrograde intramedullary nail location split trepan, includes the drill pipe, and the detachable inner core that is provided with in the drill pipe, drill pipe one end are equipped with the sawtooth, and other one end fixedly connected with handle has offered a plurality of guiding holes on the inner core.
A plurality of pointed cone-shaped positioning gripping protrusions are arranged at one end of the inner core.
The plurality of guide holes include a center hole and a plurality of eccentric holes surrounding the center hole.
The drill pipe and the inner core are made of stainless steel.
The beneficial effects of the utility model are as follows:
1. after the pressurizing threaded guide needle is driven into the tube, through 1 perspective, the drill pipe is utilized, a plurality of guide holes of the inner core are used for flexibly adjusting the entry point of the drill pipe, so that errors generated by the guide needle with inaccurate positioning are compensated, the guide needle is not required to be driven into repeatedly, the perspective times are reduced, and radiation injury is greatly weakened;
2. the diameter of the drill pipe is the same as or slightly larger than the proximal end diameter of the retrograde intramedullary nail, the extrusion effect is not generated in the drilling process of the drill pipe, the loss of reduction of the intercondylar fracture of the femur is not caused, and the indication of the retrograde intramedullary nail can be expanded to the distal femur fracture of AO/OTA C3 type;
3. the drill pipe generates little bone fragments in the drilling process, the risk of knee joint freebody can not be formed, and simultaneously, the sawn cancellous bone plug can be used as an excellent bone grafting material.
Drawings
The utility model is further described with reference to the accompanying drawings:
figure 1 is a schematic perspective view of the present utility model,
figure 2 is a schematic perspective view of the present utility model,
in the figure: drill pipe 1, inner core 2, handle 3, sawtooth 4, centre bore 5, protrusion 6, eccentric hole 7.
Detailed Description
The utility model provides an open trepan of adjustable retrograde intramedullary nail location, includes drill pipe 1, and drill pipe 1 is long 140mm, external diameter 15mm, internal diameter 14mm, and separable inner core 2 that is provided with in the drill pipe 1, inner core 2 are long 80mm, the solid cylinder of diameter 13.8mm, and drill pipe 1 one end is equipped with sawtooth 4, other one end fixedly connected with handle 3, has seted up a plurality of guiding holes on inner core 2.
Four locating and gripping protrusions 6 with sharp conical shapes are arranged at one end of the inner core 2. The height of the positioning gripping protrusion 6 is 3mm. The positioning and gripping protrusions 6 can play a role in positioning and gripping anti-slip.
The plurality of guide holes include a center hole 5 and four eccentric holes 7 surrounding the center hole 5. The central hole 5 and the eccentric hole 7 are through holes with the diameter of 2.5 mm. The four eccentric holes 7 are located at three, six, nine and twelve points, respectively.
The drill pipe 1 and the inner core 2 are made of stainless steel. Stainless steel is firm and durable, and has good corrosion resistance.
The application method of the utility model comprises the following steps: 1. a pressurized threaded guide needle is driven into the middle of the intercondylar fossa of the patient, and the nailing point is determined through perspective. 2. Selecting a guide hole of the inner core 2 according to the perspective display nailing point, and selecting a central hole 5 of the inner core 2 if the nailing point is correct; if the nail feeding point is deviated, selecting eccentric holes 7 at twelve points of the inner core 2; if the nail feeding point is deviated, selecting an eccentric hole 7 at six points of the inner core 2; if the nail feeding point is out of the position of the nail feeding point, selecting an eccentric hole 7 at the position of nine points of the inner core 2; if the nailing point is eccentric, the eccentric holes 7 at three points of the inner core 2 are selected. 3. According to the selected eccentric hole 7, hammering the inner core 2, fixing the inner core on the intercondylar fossa through positioning the grasping protrusion 6, sleeving the drill pipe 1 until sawing the intercondylar intramedullary nail placement nail channel, and finally taking out the complete cancellous bone plug.
Claims (4)
1. An adjustable retrograde intramedullary nail positioning open trephine, which is characterized in that: the drill pipe comprises a drill pipe (1), an inner core (2) is detachably arranged in the drill pipe (1), sawteeth (4) are arranged at one end of the drill pipe (1), a handle (3) is fixedly connected with the other end of the drill pipe, and a plurality of guide holes are formed in the inner core (2).
2. An adjustable retrograde intramedullary nail positioning split trepan according to claim 1, wherein: a plurality of pointed cone-shaped positioning and gripping protrusions (6) are arranged at one end of the inner core (2).
3. An adjustable retrograde intramedullary nail positioning split trepan according to claim 1, wherein: the plurality of guide holes comprise a central hole (5) and a plurality of eccentric holes (7) encircling the central hole (5).
4. An adjustable retrograde intramedullary nail positioning split trepan according to claim 1, wherein: the drill pipe (1) and the inner core (2) are made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321364884.XU CN220655627U (en) | 2023-05-31 | 2023-05-31 | Adjustable retrograde intramedullary nail positioning split trephine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321364884.XU CN220655627U (en) | 2023-05-31 | 2023-05-31 | Adjustable retrograde intramedullary nail positioning split trephine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220655627U true CN220655627U (en) | 2024-03-26 |
Family
ID=90336194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321364884.XU Active CN220655627U (en) | 2023-05-31 | 2023-05-31 | Adjustable retrograde intramedullary nail positioning split trephine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220655627U (en) |
-
2023
- 2023-05-31 CN CN202321364884.XU patent/CN220655627U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |