CN111345885A - Broken nail extractor for long bone intramedullary nail - Google Patents
Broken nail extractor for long bone intramedullary nail Download PDFInfo
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- CN111345885A CN111345885A CN202010372781.2A CN202010372781A CN111345885A CN 111345885 A CN111345885 A CN 111345885A CN 202010372781 A CN202010372781 A CN 202010372781A CN 111345885 A CN111345885 A CN 111345885A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/92—Impactors or extractors, e.g. for removing intramedullary devices
- A61B17/921—Impactors or extractors, e.g. for removing intramedullary devices for intramedullary devices
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/92—Impactors or extractors, e.g. for removing intramedullary devices
- A61B2017/922—Devices for impaction, impact element
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Abstract
The invention relates to a broken nail extractor for a long-bone intramedullary nail, belonging to the technical field of medical instruments. The grabbing device comprises a main rod and a grabbing head, wherein a handle is arranged at one end of the main rod, and the grabbing head is arranged at the other end of the main rod. When the long-bone intramedullary nail broken nail extractor is used, the left half part of the intramedullary nail in the bone cavity can be smoothly extracted through the grabbing head, and the problems that the difficulty is high, the operation time is long, the damage is large and unnecessary pain is caused to a patient in the existing operation of slotting on the bone and extracting the left intramedullary nail are solved. The broken nail extractor for the long-bone intramedullary nail has the characteristics of simple structure, good practicability and short operation time, does not increase operation incision and injury, and has positive significance for treating fracture.
Description
Technical Field
The invention relates to a broken nail extractor for a long-bone intramedullary nail, belonging to the technical field of medical instruments.
Background
Fracture refers to the continuous complete or partial breakdown of the bone structure of the human body. It is common to children and the elderly, and occurs in the middle-aged and young. Patients often have one site fractured and a few multiple fractures. When treating fracture, doctors usually reposition the fractured part and fix the repositioned fractured part by means of medical instruments; some medical fixation nails, such as intramedullary nails, are commonly used for fixation. The intramedullary nail is one of the commonly used internal fixation instruments in the orthopedic treatment and the operation of repairing the fracture of the femoral bone, the tibial bone and the humeral bone, reduces the stress directly born by the bone at the fracture part by bearing the stress of part of the leg of a patient, thereby being beneficial to accelerating the healing speed of the fracture part, simultaneously being capable of helping the patient to realize early functional exercise and weight training as soon as possible and being beneficial to the patient to recover the physiological function of the leg as soon as possible. One year to one and a half years after the fractured bone of the patient is healed. These staples need to be removed. At present, the intramedullary nail is extracted mainly by meshing the thread at the top end of the extractor with the thread on the inner wall at the tail part of the intramedullary nail, and the extractor is only suitable for the complete intramedullary nail.
However, in actual work, intramedullary nail fracture is a very common condition, once the intramedullary nail fracture (two-section) occurs, the fractured bone is often not healed, and a secondary operation is needed in the later period, and during the secondary operation, the existing extractor can only extract the upper half part of the fractured intramedullary nail, but cannot extract the lower half part of the intramedullary nail remained in a bone cavity; this situation can lead to the inability to re-operate. Generally, medical staff mostly open a groove on the bone to extract the lower half part of the residual intramedullary nail, and the operation is difficult, long in operation time and extremely harmful, and causes unnecessary pain to the patient. And therefore improvements thereof are necessary.
Disclosure of Invention
The invention aims to: the broken long-bone intramedullary nail extractor has the advantages of simple structure, good practicability, no increase of operation incision and injury, short operation time, convenient operation and effective reduction of pain of patients.
The technical scheme of the invention is as follows:
the utility model provides a long bone intramedullary nail extractor absolutely, it comprises mobile jib and snatchs head, its characterized in that: the handle is arranged at one end of the main rod, and the grabbing head is arranged at the other end of the main rod.
The grabbing head is composed of a plurality of elastic metal sheets fixedly arranged at the end of the main rod, and the elastic metal sheets are arranged on the circumference of the end of the main rod at intervals.
The elastic metal sheet is a rectangular body.
The grabbing head comprises an assembly disc, a telescopic plate and a spring, a mounting hole is formed in the center of the assembly disc, an assembly groove is formed in the assembly disc on the periphery of the mounting hole in a cross shape, the telescopic plate is mounted in the assembly groove through the spring, and the grabbing head is fixedly connected with the main rod through the mounting hole and the assembly disc.
The telescopic plate is provided with a compression rod, a compression ring is arranged above the assembling disc, and the compression rod is connected with the compression ring in a sliding mode.
The compression ring is provided with a traction rope. The pressing rod is L-shaped.
The utility model provides a broken nail extractor of long bone intramedullary nail, it comprises sleeve pipe, well core rod and snatchs head, its characterized in that: an assembly nut is fixedly arranged on a port at the top of the sleeve, a central rod is arranged in the sleeve through an assembly nut thread, the top of the central rod extends to the outer end of the assembly nut, and an operating handle is arranged at the top of the central rod extending to the outer end of the assembly nut; the bottom of the central rod extends to the lower part of the sleeve, and the bottom end of the central rod extending to the lower part of the sleeve is provided with a grabbing head.
The grabbing head consists of an upper rubber cylinder, a lower partition plate, a middle partition plate and an upper partition plate, the lower partition plate is fixedly connected with the central rod, the middle partition plate and the upper partition plate are movably mounted on the central rod above the lower partition plate, and the lower rubber cylinder is mounted on the central rod between the middle partition plate and the lower partition plate; an upper rubber cylinder is arranged on a center rod between the middle clapboard and the upper clapboard.
And an extrusion plate is fixedly arranged on the bottom port of the sleeve.
The lower partition plate, the middle partition plate and the upper partition plate are respectively in a disc shape.
The bottom of the lower clapboard is fixedly provided with an elliptical conical guide head.
The utility model provides a broken nail extractor of long bone intramedullary nail, it comprises sleeve pipe, well core rod and snatchs head, its characterized in that: an assembly nut is fixedly arranged on a port at the top of the sleeve, a central rod is arranged in the sleeve through an assembly nut thread, the top of the central rod extends to the outer end of the assembly nut, and an operating handle is arranged at the top of the central rod extending to the outer end of the assembly nut; the end of the center rod in the sleeve is movably provided with a grabbing head.
The grabbing head is composed of a grabbing block, a guide sleeve and an assembling rod, the guide sleeve is a conical body, the guide sleeve is installed on the assembling rod in a threaded mode, and the assembling rod is movably connected with the center rod. The circumference of the guide sleeve is axially and uniformly provided with sliding grooves, the sliding grooves are internally provided with grabbing blocks in a sliding mode, through holes are formed in the sleeves corresponding to the grabbing blocks, and the top ends of the grabbing blocks extend to the outer ends of the sleeves through the through holes.
A guide head is arranged at the port at the bottom of the sleeve in a threaded manner; the bottom of the grabbing block is an inclined plane, and anti-skidding teeth are arranged on the surface of the top of the grabbing block.
The invention has the beneficial effects that:
when the long-bone intramedullary nail broken nail extractor is used, the left half part of the intramedullary nail in the bone cavity can be smoothly extracted through the grabbing head, and the problems that the difficulty is high, the operation time is long, the damage is large and unnecessary pain is caused to a patient in the existing operation of slotting on the bone and extracting the left intramedullary nail are solved. The broken nail extractor for the long-bone intramedullary nail has the characteristics of simple structure, good practicability and short operation time (3-5 minutes), does not increase operation incision and injury, and has positive significance for fracture treatment.
Drawings
FIG. 1 is a schematic structural view of example 1;
FIG. 2 is a schematic structural view of the modified example 1;
FIG. 3 is a schematic structural view of the gripper head of FIG. 2;
FIG. 4 is a schematic structural view of embodiment 2;
FIG. 5 is a schematic structural view of example 3;
fig. 6 is an enlarged schematic view of a portion a in fig. 5.
In the figure: 1. the mobile jib, 2, the handle, 3, elastic metal piece, 4, the assembly dish, 5, the expansion plate, 6, the spring, 7, the mounting hole, 8, the oppression pole, 9, the compression ring, 10, the sleeve pipe, 11, well core rod, 12, the fitting nut, 13, operating handle, 14, go up the packing element, 15, lower packing element, 16, lower baffle, 17, the median septum, 18, go up the baffle, 19, the stripper plate, 20, toper guide head, 21, the haulage rope, 22, snatch the piece, 23, the uide bushing, 24, the assembly pole, 25, the fender ring.
Detailed Description
Example 1:
the broken nail extractor for the long intramedullary nail comprises a main rod 1 and a grabbing head, wherein a handle 2 is arranged at one end of the main rod 1, and the grabbing head is arranged at the other end of the main rod 1. The grabbing head is composed of a plurality of elastic metal sheets 3 fixedly arranged at the end of the main rod 1, the number of the elastic metal sheets 3 is 4, the elastic metal sheets 3 are obliquely arranged on the circumference of the end of the main rod 1 in a cross shape, and the elastic metal sheets 3 are rectangular bodies.
When the extractor for broken long-bone intramedullary nail is used, the transverse locking of the fixed intramedullary nail is firstly extracted, and if the intramedullary nail is not broken, the whole intramedullary nail can be extracted by the existing extractor. If the intramedullary nail is broken, only the broken upper half part of the intramedullary nail can be taken out by the prior extractor, and the broken lower half part of the intramedullary nail remained in the bone cavity can not be taken out. The main rod 1 and the grabbing head of the broken nail extractor of the long-bone intramedullary nail are inserted into a bone cavity, and the broken nail extractor continues to be inserted downwards to enter an upper port of a central hole of the intramedullary nail in the lower half part and extend downwards until the grabbing head extends out of a lower port of the intramedullary nail.
In the process, the grabbing head is the elastic metal sheet 3 obliquely arranged at the end of the main rod 1, and in the process of inserting the main rod into the central hole of the intramedullary nail, the central hole of the intramedullary nail exerts extrusion force on the elastic metal sheet 3, so that the elastic metal sheet 3 is in a shrinkage shape relative to the main rod 1, after the grabbing head extends out from the lower port of the intramedullary nail, the extrusion force exerted on the elastic metal sheet 3 by the central hole of the intramedullary nail disappears, each elastic metal sheet 3 resets and expands, and the expansion diameter is larger than the outer diameter of the intramedullary nail, therefore, the elastic metal sheet 3 can form a hook on the intramedullary nail by lifting the main rod 1, and further, the broken lower half part of the intramedullary nail remained in the bone cavity can be taken out along with the lifting of.
The broken nail extractor for the long-bone intramedullary nail has the characteristics of simple structure, good practicability and short operation time, and solves the problems that the operation caused by the fact that the residual intramedullary nail is extracted by slotting on the bone in the prior art is not only difficult, but also long in operation time and extremely damaged, and unnecessary pain is caused to a patient. The long-bone intramedullary nail broken nail extractor does not increase surgical incision and long-bone injury, and has positive significance for fracture treatment.
As an improvement of the grabbing head, the grabbing head is composed of an assembly disc 4, a telescopic plate 5 and a spring 6, and a mounting hole 7 is formed in the center of the assembly disc 4 and used for being connected and fixed with the main rod 1. The assembling disc 4 on the periphery of the mounting hole 7 is provided with an assembling groove in a cross shape, the assembling groove is a dovetail groove, an expansion plate 5 is arranged in the assembling groove through a spring 6, and a compression rod 8 is fixedly arranged on the expansion plate 5. The pressing rod 8 is L-shaped; a compression ring 9 is arranged above the assembling disc 4, and the compression rod 8 is connected with the compression ring 9 in a sliding insertion mode. A traction rope 21 is arranged on the compression ring 9, and one end of the traction rope 21 extends to the upper part of the handle 2.
When the improved grabbing head is used, the compression ring 9 is firstly sleeved on the main rod 1 through the handle 2, then the compression rods 8 are extruded inwards to enable the expansion plate 5 to contract inwards in the radial direction, and then the compression ring 9 slides downwards to enable the compression rods 8 to be inserted into inner holes of the compression ring 9, so that the expansion plate 5 is kept in a state of contracting inwards in the radial direction, and the end head of the expansion plate 5 is prevented from exceeding the outer diameter of the assembling disc 4.
After the preparation is completed, the main rod 1 and the grabbing head of the long-bone intramedullary nail broken nail extractor are inserted downwards along the bone cavity, so that the main rod and the grabbing head enter the upper port of the central hole of the intramedullary nail in the lower half part and extend downwards, and after the grabbing head enters the central hole of the intramedullary nail, the traction rope 21 is lifted upwards, so that the sliding insertion state of the compression ring 9 and the compression rod 8 is released.
After the sliding insertion state of the compression ring 9 and the compression rod 8 is released, the expansion plate 5 extends under the action of the spring 6, namely, the end of the expansion plate 5 exceeds the outer diameter of the assembling disc 4, at the moment, the end of the expansion plate 5 is in contact with the inner wall of the intramedullary nail, and under the separation of the inner wall of the intramedullary nail, the expansion plate 5 cannot continue to extend, and at the moment, the main rod 1 is continuously and slowly inserted downwards and the main rod 1 is rotated in the circumferential direction.
In the process, when the grabbing head moves to the position of the transverse locking nail hole of the intramedullary nail, and the expansion plate 5 is inosculated with the nail hole, the blocking force of the inner wall of the intramedullary nail on the expansion plate 5 disappears, and under the action of the spring 6, the expansion plate 5 stretches out again and enters the nail hole, so that the intramedullary nail is hooked, and then the broken lower half part of the intramedullary nail remained in the bone cavity can be taken out along with the upward lifting of the main rod 1 (see fig. 2 and 3).
Example 2:
the broken nail extractor for the long intramedullary nail comprises a sleeve 10, a central rod 11 and a grabbing head, wherein an assembly nut 12 is fixedly arranged on a top port of the sleeve 10, the central rod 11 is arranged in the sleeve 10 through threads of the assembly nut 12, the top of the central rod 11 extends to the outer end of the assembly nut 12, and an operating handle 13 is arranged at the top of the central rod 11 extending to the outer end of the assembly nut 12; the bottom of the center rod 11 extends to the lower part of the casing 10, and a pressing plate 19 is fixedly arranged on the bottom port of the casing 10. The bottom end of the center rod 11 extending below the casing 10 is provided with a gripping head.
The grabbing head is composed of an upper rubber cylinder 14, a lower rubber cylinder 15, a lower partition plate 16, a middle partition plate 17 and an upper partition plate 18, wherein the lower partition plate 16, the middle partition plate 17 and the upper partition plate 18 are respectively in a disc shape. An elliptical conical guide head 20 is fixedly mounted at the bottom of the lower partition 16. So as to facilitate the integral insertion of the grabbing head; the lower partition plate 16 is fixedly connected with the bottom end of the central rod 11, a middle partition plate 17 and an upper partition plate 18 are movably mounted on the central rod 11 above the lower partition plate 16, and a lower rubber cylinder 15 is mounted on the central rod 11 between the middle partition plate 17 and the lower partition plate 16; an upper rubber cylinder 14 is arranged on the central rod 11 between the middle partition plate 17 and the upper partition plate 18.
When in use, the grabbing head of the broken nail extractor of the long intramedullary nail is inserted downwards along the bone cavity to enter the central hole of the intramedullary nail at the lower half part, when the grabbing head enters a certain position of the central hole of the intramedullary nail, the central rod 11 is rotated by the operating handle 13 to move upwards relative to the sleeve 10, in the process, the lower clapboard 16 applies an upward extrusion force to the upper rubber cylinder 14 and the lower rubber cylinder 15, and as the extrusion plate 19 is fixedly arranged on the bottom port of the sleeve 10, under the action of the upward extrusion force of the lower partition plate 16, the extrusion plate 19 simultaneously applies a downward extrusion force to the upper rubber cylinder 14 and the lower rubber cylinder 15, and the upper rubber cylinder 14 and the lower rubber cylinder 15 are extruded in a double-force fit manner to force the upper rubber cylinder 14 and the lower rubber cylinder 15 to deform so as to expand and deform in the radial direction, thereby squeezing the intramedullary nail, the squeezing force is maintained through the thread fit of the central rod 11 and the assembly nut 12, and the purpose of grabbing the intramedullary nail is realized. The broken lower half of the intramedullary nail remaining in the bone cavity can be removed by lifting the central rod 11 upward (see fig. 4). The broken nail extractor for the long-bone intramedullary nail has the characteristics of simple structure, good practicability and short operation time, and solves the problems that the operation caused by the fact that the residual intramedullary nail is extracted by slotting on the bone in the prior art is not only difficult, but also long in operation time and extremely damaged, and unnecessary pain is caused to a patient. The long-bone intramedullary nail broken nail extractor does not increase surgical incision and long-bone injury, and has positive significance for fracture treatment.
Example 3:
the broken nail extractor for the long intramedullary nail comprises a sleeve 10, a central rod 11 and a grabbing head, wherein an assembly nut 12 is fixedly arranged on a top port of the sleeve 10, the central rod 11 is arranged in the sleeve 10 through threads of the assembly nut 12, the top of the central rod 11 extends to the outer end of the assembly nut 12, and an operating handle 13 is arranged at the top of the central rod 11 extending to the outer end of the assembly nut 12; the end of the central rod 11 in the sleeve 10 is movably provided with a grabbing head. Snatch the head and constitute by snatching piece 22, uide bushing 23 and assembly pole 24, uide bushing 23 is the conical body, and uide bushing 23 threaded mounting has spout (dovetail) on assembly pole 24, and the axial equipartition has on the circumference of uide bushing 23, and slidable mounting has and snatchs piece 22 in the spout, snatchs 22 bottoms and be the inclined plane, snatchs 22 top surfaces and is provided with anti-skidding tooth to increase frictional force at work, prevent to skid.
The sleeve 10 corresponding to the grabbing block 22 is provided with a through hole, and in operation, under the thrust action of the guide sleeve 23, the top end of the grabbing block 22 extends to the outer end of the sleeve 10 through the through hole. The grabbing head is movably connected with the central rod 11 through a bearing by an assembling rod 24, and during work, the grabbing head can move along with the up-and-down movement of the central rod 11 but cannot rotate along with the circumferential direction of the central rod 11. A guide head 20 is installed at the bottom port of the sleeve 10 in a threaded manner; to facilitate insertion during operation; the assembly rod 24 at the end of the guide sleeve 23 is provided with a stop ring 25 in a threaded manner to prevent the gripping block 22 from falling out of the chute.
When in use, the whole long-bone intramedullary nail broken nail extractor is inserted downwards along the bone cavity to enter the central hole of the intramedullary nail in the lower half part, and the grabbing block 22 is positioned at the top end of the grabbing block 22 and hidden in the through hole under the normal state and is not contacted with the intramedullary nail. When the guide head 20 enters a certain position of a central hole of the intramedullary nail, the central rod 11 is rotated through the operating handle 13 to enable the central rod to move downwards relative to the sleeve 10, in the process, the through hole plays an axial limiting role in the grabbing block 22, and the guide sleeve 23 and the assembling rod 24 are driven to move downwards along with the downward movement of the central rod 11; as the grabbing block 22 is in sliding connection with the guide sleeve 23, and the guide sleeve 23 is a conical body, the grabbing block 22 is pushed to radially extend out in the descending process of the guide sleeve 23, so that the intramedullary nail is squeezed, the extrusion force is kept through the threaded matching of the central rod 11 and the assembling nut 12, and the purpose of grabbing the intramedullary nail is achieved. At this time, the lower half of the broken intramedullary nail remaining in the bone cavity is removed by lifting the center rod 11 (see fig. 5 and 6).
The broken nail extractor for the long-bone intramedullary nail has the characteristics of simple structure, good practicability and short operation time, and solves the problems that the operation caused by the fact that the residual intramedullary nail is extracted by slotting on the bone in the prior art is not only difficult, but also long in operation time and extremely damaged, and unnecessary pain is caused to a patient. The long-bone intramedullary nail broken nail extractor does not increase surgical incision and long-bone injury, and has positive significance for fracture treatment.
Claims (10)
1. The utility model provides a long bone intramedullary nail extractor absolutely, it comprises mobile jib (1) and snatchs head, its characterized in that: the handle (2) is arranged at one end of the main rod (1), and the grabbing head is arranged at the other end of the main rod (1).
2. The extractor for broken nail of long intramedullary nail according to claim 1, wherein: the grabbing head is composed of a plurality of elastic metal sheets (3) fixedly arranged at the end of the main rod, and the elastic metal sheets (3) are arranged at intervals on the circumference of the end of the main rod (1); the elastic metal sheet (3) is a rectangular body.
3. The extractor for broken nail of long intramedullary nail according to claim 1, wherein: the grabbing head is composed of an assembly disc (4), a telescopic plate (5) and a spring (6), a mounting hole (7) is formed in the center of the assembly disc (4), an assembly groove is formed in the assembly disc (4) on the periphery of the mounting hole (7) in a cross shape, the telescopic plate (5) is installed in the assembly groove through the spring (6), and the grabbing head is fixedly connected with the main rod (1) through the mounting hole (7) by the assembly disc (4).
4. A broken long intramedullary nail extractor according to claim 3, wherein: a compression rod (8) is arranged on the expansion plate (5), a compression ring (9) is arranged above the assembly disc (4), and the compression rod (8) is connected with the compression ring (9) in a sliding and inserting manner; a traction rope (21) is arranged on the compression ring (9); the pressing rod (8) is L-shaped.
5. The utility model provides a broken nail extractor of long bone intramedullary nail, it comprises sleeve pipe (10), well core rod (11) and snatchs head, its characterized in that: an assembly nut (12) is fixedly arranged on a top port of the sleeve (10), a central rod (11) is arranged in the sleeve (10) through threads of the assembly nut (12), the top of the central rod (11) extends to the outer end of the assembly nut (12), and an operating handle (13) is arranged at the top of the central rod (11) extending to the outer end of the assembly nut (12); the bottom of the central rod (11) extends to the lower part of the sleeve (10), and the bottom end of the central rod (11) extending to the lower part of the sleeve (10) is provided with a grabbing head.
6. The extractor for broken long intramedullary nail according to claim 5, wherein: the grabbing head consists of an upper rubber cylinder (14), a lower rubber cylinder (15), a lower partition plate (16), a middle partition plate (17) and an upper partition plate (18), the lower partition plate (16) is fixedly connected with the central rod (11), the middle partition plate (17) and the upper partition plate (18) are movably mounted on the central rod (11) above the lower partition plate (16), and the lower rubber cylinder (15) is mounted on the central rod (11) between the middle partition plate (17) and the lower partition plate (16); an upper rubber cylinder (14) is arranged on a center rod (11) between the middle partition plate (17) and the upper partition plate (18); and a pressing plate (19) is fixedly arranged on the bottom port of the sleeve (10).
7. The extractor for broken long intramedullary nail according to claim 6, wherein: the lower partition plate (16), the middle partition plate (17) and the upper partition plate (18) are respectively in a disc shape; an elliptical conical guide head (20) is fixedly arranged at the bottom of the lower clapboard (16).
8. The utility model provides a broken nail extractor of long bone intramedullary nail, it comprises sleeve pipe (10), well core rod (11) and snatchs head, its characterized in that: an assembly nut (12) is fixedly arranged on a top port of the sleeve (10), a central rod (11) is arranged in the sleeve (10) through threads of the assembly nut (12), the top of the central rod (11) extends to the outer end of the assembly nut (12), and an operating handle (13) is arranged at the top of the central rod (11) extending to the outer end of the assembly nut (12); the end of the central rod (11) in the sleeve (10) is movably provided with a grabbing head.
9. The extractor for broken long intramedullary nail according to claim 8, wherein: the grabbing head consists of a grabbing block (22), a guide sleeve (23) and an assembling rod (24), the guide sleeve (23) is a conical body, the guide sleeve (23) is installed on the assembling rod (24) in a threaded mode, and the assembling rod (24) is movably connected with the central rod (11); the circumference of uide bushing (23) is gone up the axial equipartition and is had the spout, and slidable mounting has in the spout and snatchs piece (22), snatchs and is provided with the through-hole on the sleeve pipe (10) that piece (22) correspond, snatchs piece (22) top and extends to sleeve pipe (10) outer end through the through-hole.
10. The extractor for broken nail of long intramedullary nail according to claim 9, wherein: a guide head (20) is installed at the bottom port of the sleeve (10) in a threaded manner; the bottom of the grabbing block (22) is an inclined plane, and anti-skidding teeth are arranged on the surface of the top of the grabbing block (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010372781.2A CN111345885A (en) | 2020-05-06 | 2020-05-06 | Broken nail extractor for long bone intramedullary nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010372781.2A CN111345885A (en) | 2020-05-06 | 2020-05-06 | Broken nail extractor for long bone intramedullary nail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111345885A true CN111345885A (en) | 2020-06-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010372781.2A Pending CN111345885A (en) | 2020-05-06 | 2020-05-06 | Broken nail extractor for long bone intramedullary nail |
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| CN (1) | CN111345885A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111991069A (en) * | 2020-09-03 | 2020-11-27 | 河北春立航诺新材料科技有限公司 | PFNA intramedullary nail and system with short proximal end |
-
2020
- 2020-05-06 CN CN202010372781.2A patent/CN111345885A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111991069A (en) * | 2020-09-03 | 2020-11-27 | 河北春立航诺新材料科技有限公司 | PFNA intramedullary nail and system with short proximal end |
| CN111991069B (en) * | 2020-09-03 | 2022-04-12 | 河北春立航诺新材料科技有限公司 | PFNA intramedullary nail and system with short proximal end |
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