CN204049814U - A kind of automatic dynamic compress intramedullary nail - Google Patents
A kind of automatic dynamic compress intramedullary nail Download PDFInfo
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- CN204049814U CN204049814U CN201420533328.5U CN201420533328U CN204049814U CN 204049814 U CN204049814 U CN 204049814U CN 201420533328 U CN201420533328 U CN 201420533328U CN 204049814 U CN204049814 U CN 204049814U
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- slotted eye
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Abstract
A kind of automatic dynamic compress intramedullary nail, belongs to technical field of medical instruments.It comprises the lock screw in the rectangular oval dynamic pressurized slotted eye of intramedullary pin rivet nut, the locking nail of near-end, the locking nail of far-end, the rectangular oval dynamic pressurized slotted eye of far-end, the locking nail of far-end and far-end, it is characterized in that between the rectangular oval dynamic pressurized slotted eye of far-end and lock screw, liner has Absorbable rod liner, Absorbable rod liner is shaped with the screwed hole that lock screw can be threaded through.This utility model is because its liner between rectangular oval dynamic pressurized slotted eye and lock screw has Absorbable rod liner, and lock screw still adopts existing screw, so before union of fracture, existing screw can ensure its intensity, and after union of fracture, Absorbable rod liner can be absorbed by the body, thus make lock screw automatically ineffective, realize the dynamic pressurized of intramedullary pin, promote union of fracture, exempt and carry out second operation, reduce and bring misery to patient.
Description
Technical field
This utility model belongs to technical field of medical instruments, is specifically related to a kind of automatic dynamic compress intramedullary nail.
Background technology
At present, intramedullary pin is the most frequently used internal fixtion of long bone fracture.Existing intramedullary pin nail composition: intra medullary nail far-end is provided with two groups of nail, one is elongated hole from the hole away from intramedullary pin near-end, and interlaced hole, another several positions of differing from intramedullary pin near-end distance is circular lock hole.The operation principle of intramedullary pin: during operation, the interlaced circular lock hole in several positions all sets up lock screw, and these lock screw fixedly prevent the rotation of intramedullary pin in pulp cavity and the slippage along pulp cavity direction.In elongated hole, also set up screw near circular locking nose end, this piece of screw allows intramedullary pin to have certain displacement along pulp cavity direction.Stop because the lock screw in circular lock hole exists stress, wait postoperative a period of time need remove lock screw in circular lock hole to realize the dynamic pressurized of intramedullary pin, certainly will second operation be carried out like this, bring misery to patient.As publication number: CN102551858A " a kind of femoral interlocking nail " and publication number: 101632600 " interlocking intramedullary nail preventing bone nonunions ", the other locking nail fixed position (6) of long oval dynamic pressurization groove (2) place locking nail, a spacing bioabsorbable interference screw (5) is disposed for unstable fracture, prevent locking nail from sliding in slotted eye, make unstable fracture be in steady statue, realize Self-pressurizing agri, promote union of fracture, reduce bone does not connect chance, exempt to unlock.But there is the disadvantage of intensity not as good as existing metallic screw intensity of " bioabsorbable interference screw " in technique scheme, worry union of fracture before six weeks " bioabsorbable interference screw " do not prop up fracture because of intensity or to shatter and ineffective, therefore, technique scheme dare not be applied in operation.
Summary of the invention
The purpose of this utility model is the intramedullary pin that will provide an automatic dynamic pressurization, it can overcome the disadvantage that existing intramedullary pin adopts " bioabsorbable interference screw " to exist, the intensity of lock screw in rectangular oval dynamic pressurized slotted eye before can ensureing union of fracture, after ensureing again union of fracture, lock screw is automatically ineffective, realize the dynamic pressurized of intramedullary pin, promote union of fracture, exempt and carry out second operation, reduce and bring misery to patient.
This utility model is achieved through the following technical solutions, a kind of automatic dynamic compress intramedullary nail, comprise the lock screw in the rectangular oval dynamic pressurized slotted eye of intramedullary pin rivet nut, the locking nail of near-end, the locking nail of far-end, the rectangular oval dynamic pressurized slotted eye of far-end, the locking nail of far-end and the far-end being shaped with cavity, its main points are that between the rectangular oval dynamic pressurized slotted eye of far-end and lock screw, liner has Absorbable rod liner, Absorbable rod liner is shaped with the screwed hole that lock screw can be threaded through.
As preferably, described rectangular oval dynamic pressurized slotted eye becomes stairstepping, and the shape of Absorbable rod liner is consistent with rectangular oval dynamic pressurized slotted eye.
The beneficial effects of the utility model: because its liner between rectangular oval dynamic pressurized slotted eye and lock screw has Absorbable rod liner, and lock screw still adopts existing screw and metallic screw, so before union of fracture, existing screw can ensure its intensity, and after union of fracture, Absorbable rod liner can be absorbed by the body, thus make lock screw automatically ineffective, realize the dynamic pressurized of intramedullary pin, promote union of fracture, exempt and carry out second operation, reduce and bring misery to patient.
Accompanying drawing explanation
Fig. 1: this utility model front view;
The assembling partial sectional view of Fig. 2: Fig. 1;
Rectangular oval dynamic pressurized slotted eye enlarged drawing in Fig. 3: Fig. 2;
In Fig. 1-3, the intramedullary pin rivet nut 1,2-that 1-is shaped with cavity locks nail, and 3-locks nail, the rectangular oval dynamic pressurized slotted eye of 4-, 5-lock screw, 6-Absorbable rod liner, 7-screwed hole.
Detailed description of the invention
Specific embodiment below just represented by Fig. 1-3 is further described this utility model, it comprises the lock screw 5 in the intramedullary pin rivet nut 1 being shaped with cavity, three of near-end locking nail 2, two locking nail 3 of far-end, a rectangular oval dynamic pressurized slotted eye 4 of far-end, the locking nail 3 of far-end and the rectangular oval dynamic pressurized slotted eye 4 of far-end, between the rectangular oval dynamic pressurized slotted eye 4 of far-end and lock screw 3, liner has Absorbable rod liner 6, Absorbable rod liner 6 is shaped with the screwed hole 7 that lock screw 3 can be threaded through.Described rectangular oval dynamic pressurized slotted eye 4 one-tenth stairsteppings, the shape of Absorbable rod liner 6 is consistent with rectangular oval dynamic pressurized slotted eye 4.
Claims (2)
1. an automatic dynamic compress intramedullary nail, comprise the lock screw in the rectangular oval dynamic pressurized slotted eye of intramedullary pin rivet nut, the locking nail of near-end, the locking nail of far-end, the rectangular oval dynamic pressurized slotted eye of far-end, the locking nail of far-end and the far-end being shaped with cavity, it is characterized in that between the rectangular oval dynamic pressurized slotted eye of far-end and lock screw, liner has Absorbable rod liner, Absorbable rod liner is shaped with the screwed hole that lock screw can be threaded through.
2. a kind of automatic dynamic compress intramedullary nail according to claim 1, is characterized in that: described rectangular oval dynamic pressurized slotted eye becomes stairstepping, and the shape of Absorbable rod liner is consistent with rectangular oval dynamic pressurized slotted eye.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420533328.5U CN204049814U (en) | 2014-09-17 | 2014-09-17 | A kind of automatic dynamic compress intramedullary nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420533328.5U CN204049814U (en) | 2014-09-17 | 2014-09-17 | A kind of automatic dynamic compress intramedullary nail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204049814U true CN204049814U (en) | 2014-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420533328.5U Active CN204049814U (en) | 2014-09-17 | 2014-09-17 | A kind of automatic dynamic compress intramedullary nail |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204049814U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105232135A (en) * | 2015-10-30 | 2016-01-13 | 天津市新中医疗器械有限公司 | Static-dynamic compression intramedullary nail |
| CN110215269A (en) * | 2019-06-14 | 2019-09-10 | 陈聚伍 | The miniature intramedullary nail of controllable rotating resistant to separation |
| CN110215269B (en) * | 2019-06-14 | 2024-07-16 | 陈聚伍 | Controllable rotary anti-separation miniature intramedullary nail |
-
2014
- 2014-09-17 CN CN201420533328.5U patent/CN204049814U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105232135A (en) * | 2015-10-30 | 2016-01-13 | 天津市新中医疗器械有限公司 | Static-dynamic compression intramedullary nail |
| CN110215269A (en) * | 2019-06-14 | 2019-09-10 | 陈聚伍 | The miniature intramedullary nail of controllable rotating resistant to separation |
| CN110215269B (en) * | 2019-06-14 | 2024-07-16 | 陈聚伍 | Controllable rotary anti-separation miniature intramedullary nail |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: ZHEJIANG CANWELL MEDICAL CO., LTD. Free format text: FORMER NAME: KEHUI MEDICAL EQUIPMENT CO., LTD., ZHEJIANG |
|
| CP03 | Change of name, title or address |
Address after: 321016 Zhejiang Province, Jinhua city Wucheng District Xianghua Street No. 466 Patentee after: Zhejiang Ke Hui Medical Treatment Equipment Co., Ltd Address before: 321016 Zhejiang city in Jinhua Province, Xinhua Street No. 466 Patentee before: Zhejiang Canwell Medical Co., Ltd. |