CN113813036A - Shape-fitting nail internal fixation system for intertrochanteric fracture - Google Patents
Shape-fitting nail internal fixation system for intertrochanteric fracture Download PDFInfo
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- CN113813036A CN113813036A CN202110967909.4A CN202110967909A CN113813036A CN 113813036 A CN113813036 A CN 113813036A CN 202110967909 A CN202110967909 A CN 202110967909A CN 113813036 A CN113813036 A CN 113813036A
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- nail
- intramedullary
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- pressure
- connecting rod
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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
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8685—Pins or screws or threaded wires; nuts therefor comprising multiple separate parts
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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
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/74—Devices for the head or neck or trochanter of the femur
Abstract
The invention discloses a femoral intertrochanteric fracture conformal nail internal fixation system which comprises a positioning handle, an intramedullary nail, a pressure nail, a tension nail and an anti-rotation locking nail, wherein the upper end of the positioning handle is provided with a connecting rod, the connecting rod is connected with the upper end of the intramedullary nail through a buckle type quick joint, the lower end of the intramedullary nail is inserted into a medullary cavity of a femur, the upper end of the intramedullary nail is positioned at the proximal end of the femur, the front end of the pressure nail penetrates through a pressure nail hole in the intramedullary nail and is inserted into a femoral head along the direction of a pressure bone trabecula, the front end of the tension nail penetrates through a pressure nail hole in the intramedullary nail and is inserted into the femoral head along the direction of a tension bone trabecula, the anti-rotation locking nail penetrates through an anti-rotation locking nail hole and a femoral shaft in the intramedullary nail, and a guiding device of the pressure nail, the tension nail and the anti-rotation locking nail is arranged on the positioning handle. The intramedullary nail is connected with the positioning handle through the buckle type quick connector, so that the assembly and disassembly are very convenient and quick, and the operation treatment efficiency of the intertrochanteric fracture of the femur can be effectively improved.
Description
Technical Field
The invention relates to a conformal nail internal fixation system for treating intertrochanteric fracture diseases, belonging to the technical field of medical instruments.
Background
The intertrochanteric fracture of femur, also called intertrochanteric fracture, is a common clinical orthopedic disease, the disease is frequently seen in the elderly population, the incidence rate of intertrochanteric fracture of femur also shows a trend of increasing year by year along with the continuous deepening of the aging degree of the population in China and the acceleration of the rhythm of social life, and the proportion of intertrochanteric fracture of femur in hip fracture can reach about 50%. If the patient with the disease is not treated and intervened timely and effectively, various structural dysfunctions can occur, and even the lower limb mobility is lost. Conservative treatment requires long-term bed rest, which can lead to more complications and threaten the life of patients in severe cases. Surgical treatment is therefore the best treatment for intertrochanteric femoral fractures.
The mainstream directions for treating the diseases by the operation comprise two types of steel plate internal fixation and shape-fitting nail internal fixation, the femoral head is a main stressed part of a human body, and the dynamic hip is fixed by the steel plate cortex, so that the femoral head is frequently repaired due to over-force when being applied to femoral end fracture, and the shape-fitting nail internal fixation mode is the mainstream solution for the diseases at present.
The conformal nail generally includes an intramedullary nail, a pressure nail, a tension nail and an anti-rotation locking nail (as shown in fig. 1), and in order to implant the conformal nail into the bone quickly and accurately, a medical staff needs to operate by means of a positioning handle and a guiding device arranged on the positioning handle. When the femur of a patient is internally fixed, the top end of the intramedullary nail 1 is connected with the positioning handle, then the intramedullary nail 1 is driven into the medullary cavity of the femur from the proximal end of the femur by knocking the hammering table on the positioning handle, the intramedullary nail 1 is in place and then the pressure nail, the tension nail and the anti-rotation locking nail are implanted into the bone by utilizing the guiding device on the positioning handle, and finally the positioning handle is detached to finish the internal fixation of the fractured bone. At present, a positioning handle is generally connected with an intramedullary nail through screws, and the defects of the positioning handle are that the operation is more complicated, the time consumption for dismounting is longer, and the operation efficiency is reduced.
The fracture line of many femoral intertrochanteric fracture patients passes through the top end of the tuberosity, and the area is the most preferable area for the intervention of intramedullary nails (see fig. 2), and as the tops of the existing intramedullary nails are all in a uniform cylindrical shape, the fracture line (bone seam) at the lesser trochanter is often spread after the implantation, so that the restoration of the biomechanical angle of the femoral neck and the femoral shaft is influenced, and even the affected part cannot be healed and finally necrotizes.
Before the pressure nail is implanted, a pressure nail drill sleeve 6 and a kirschner wire guide sleeve 7 are arranged on a positioning handle 5, then a kirschner wire 9 is driven into a human body under the guiding action of the kirschner wire guide sleeve 7, and the kirschner wire pointing to the center of the femoral head is used for guiding and implanting the pressure nail into a bone. However, in clinical use, due to the influence of the flexibility of the kirschner wire, the front end of the kirschner wire is often deflected upwards after entering the cortical bone, so that the direction of the kirschner wire is deviated from the preset direction, thereby causing great difficulty in installing the pressure nail. How to effectively prevent the kirschner wire from deviating is always a difficult problem which troubles medical personnel.
Disclosure of Invention
The invention aims to provide a quickly detachable internal fixing system of a femoral intertrochanteric fracture conformal nail aiming at the defects of the prior art so as to improve the operation efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a fracture is transferred to shape nail internal fixation system between femoral trochanter, includes location handle, intramedullary nail, pressure nail, pulling force nail and prevents revolving the locking nail, the upper end of location handle is equipped with the connecting rod, the connecting rod passes through the upper end of buckle formula quick-operation joint with the intramedullary nail and is connected, the lower extreme of intramedullary nail inserts in the medullary cavity of thighbone, and the upper end is located the thighbone near-end, the front end of pressure nail passes the pressure nail hole on the intramedullary nail and inserts the femoral head along the direction of pressure bone trabecula, the front end of pulling force nail passes the pressure nail hole on the intramedullary nail and inserts the femoral head along the direction of tension bone trabecula, prevent revolving the locking nail and pass on the intramedullary nail prevent revolving locking nail hole and femoral shaft, be equipped with the guider of pressure nail, pulling force nail and prevent revolving the locking nail on the location handle.
The snap-in type quick joint comprises two hooks, a key push rod, a connecting plate and two trigger ejector rods, wherein the key push rod, the connecting plate and the two trigger ejector rods are arranged in an inner hole of the connecting rod, hook handles of the two hooks are inserted into the inner hole of the connecting rod from bottom to top, hook heads respectively correspond to clamping grooves on the inner walls of two sides of a positioning hole on the upper end surface of an intramedullary nail, the middle part of each hook handle is rotatably connected with the connecting rod through a rotating shaft, the upper end of each hook handle is connected with the hole wall of the inner hole of the connecting rod through a spring, so that the hook heads of the hooks are clamped into the corresponding clamping grooves through the elasticity of the springs, one ends of the two trigger ejector rods are fixedly connected with the connecting plate, the other ends of the two trigger ejector rods are respectively in sliding contact with the inclined planes at the upper ends of the hook handles of the two hooks, thereby make the gib head of couple break away from the draw-in groove through triggering the ejector pin, the one end and the connecting plate of button push rod are connected, and the other end stretches out and is fixed with the button from the hole of connecting rod.
According to the internal fixation system for the intertrochanteric fracture conformal nail, one side of the upper end of the intramedullary nail, which is opposite to the femoral head, contracts towards the central line direction of the intramedullary nail.
According to the internal fixing system for the intertrochanteric fracture conformable nail, the cross section of the upper end of the intramedullary nail is D-shaped or oblate.
According to the internal fixing system for the intertrochanteric fracture conformal nail, the through hole is formed in the nail rod of the pressure nail, the tension nail penetrates through the through hole, the pressurizing threads are arranged at the front ends of the pressure nail and the tension nail, and the tension nail is in threaded fit with the intramedullary nail.
The fixing system comprises a positioning handle, a positioning handle and a fixing device, wherein the positioning handle is provided with a positioning hole, a positioning hole and a pressure nail, the positioning hole is arranged in the positioning handle, the fixing device is arranged in the positioning hole, the fixing device comprises a tension nail drill sleeve, a rotation-preventing locking nail guide hole and a pressure nail drill sleeve, the pressure nail drill sleeve is movably sleeved with a Kirschner wire guide sleeve, and a Kirschner wire for guiding a pressure nail to be implanted into a bone is driven into a femoral head through the Kirschner wire guide sleeve and a pressure nail hole in an intramedullary nail.
According to the internal fixing system for the intertrochanteric fracture conformable nail, the pressure nail drill sleeve and the tension nail drill sleeve penetrate through the through hole in the positioning handle and are in transition fit with the positioning handle, and the kirschner wire guide sleeve is in transition fit with the pressure nail drill sleeve.
The internal fixing system for the intertrochanteric fracture conformable nail further comprises a Kirschner wire calibrating rod, wherein the Kirschner wire calibrating rod penetrates through a through hole in the connecting rod and is matched with the connecting rod through threads, and the lower end of the Kirschner wire calibrating rod is inserted into a central hole of the intramedullary nail and abuts against a Kirschner wire which is driven into the pressure nail hole.
Above-mentioned fracture fit nail internal fixation system between femoral trochanter, the upper portion of connecting rod is equipped with the hammering platform, pass through slot connection between hammering platform and the connecting rod.
According to the internal fixing system for the intertrochanteric fracture conformal nail, the upper end of the Kirschner wire calibration rod is provided with the rotating handle.
The intramedullary nail is connected with the positioning handle through the buckle type quick connector, so that the assembly and disassembly are very convenient and quick, and the operation treatment efficiency of the intertrochanteric fracture of the femur can be effectively improved.
The invention improves the shape of the upper end of the intramedullary nail, can avoid the interference between the intramedullary nail and the fracture end without influencing the internal fixation strength, and ensures that the fracture line at the lesser trochanter is not spread, thereby promoting the recovery of the biomechanics angle of the femoral neck and the femoral shaft and avoiding the bone necrosis caused by the unhealed healing of the affected part.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic structural view of a conformable nail;
FIG. 2 is a schematic illustration of internal fixation of intertrochanteric fractures using a conventional intramedullary nail;
FIG. 3 is a schematic structural view of the present invention;
fig. 4 is a schematic structural view of the upper end of the intramedullary nail of the present invention, wherein fig. 4 (a) is an isometric view, fig. 4 (b) is a side sectional view, and fig. 4 (c) is a front sectional view;
fig. 5 is a cross-sectional view of the connecting rod.
The reference numbers in the figures are as follows: 1. the nail comprises an intramedullary nail, 1-1 parts of a positioning hole, 1-2 parts of a positioning notch, 1-3 parts of a clamping groove, 1-4 parts of a tension nail hole, 1-5 parts of a pressure nail hole, 1-6 parts of an anti-rotation locking nail hole, 2 parts of a pressure nail, 3 parts of a tension nail, 4 parts of an anti-rotation locking nail, 5 parts of a positioning handle, 5-1 parts of a connecting rod, 5-2 parts of a threaded hole, 6 parts of a pressure nail drill bushing, 7 parts of a Kirschner wire guide sleeve, 8 parts of a femoral shaft, 9 parts of a Kirschner wire, 10 parts of a femoral neck, 11 parts of a femoral head, 12 parts of a Kirschner wire calibration rod, 13 parts of a tension nail drill bushing, 14 parts of an anti-rotation locking nail guide hole, 15 parts of a key, 16 parts of a hammering table, 17 parts of a rotating handle, 18 parts of a key push rod, 19 parts of a connecting plate, 20 parts of a trigger push rod, 21 parts of a spring, 22 parts of a rotating shaft, 23 parts of a hook, 24 parts of a big rotor, 25 parts of a tuberosity, 26 parts of a small rotor.
Detailed Description
Referring to fig. 3 to 5, the invention mainly comprises an intramedullary nail 1, a pressure nail 2, a tension nail 3, a rotation-proof locking nail 4, a positioning handle 5, an intramedullary nail connecting rod 5-1, a pressure nail drill bushing 6, a kirschner wire guide sleeve 7, a kirschner wire 9, a kirschner wire calibration rod 12, a tension nail drill bushing 13, a hammering table 16, a rotating handle 17 and a snap-in quick connector, wherein the snap-in quick connector comprises a key 15, a key push rod 18, a connecting plate 19, a trigger ejector rod 20, a spring 21, a rotating shaft 22 and a hook 23.
The positioning handle 5 is fixedly connected with the upper end of the intramedullary nail 1 through an intramedullary nail connecting rod 5-1 arranged at the upper end of the intramedullary nail connecting rod, in order to prevent the relative rotation between the intramedullary nail 1 and the positioning handle 5, a positioning hole 1-1 is arranged on the upper end surface of the intramedullary nail 1, a positioning notch 1-2 matched with an anti-rotation clamping platform on the positioning handle 5 is arranged on the hole wall of the positioning hole 1-1, a threaded hole 5-2 opposite to a central hole at the upper end of the intramedullary nail 1 is arranged on the intramedullary nail connecting rod 5-1, and an external thread matched with an internal thread in the threaded hole 5-2 is arranged on the Kirschner wire calibrating rod 12. After the kirschner wire calibrating rod 12 is screwed into the threaded hole 5-2, the lower end of the kirschner wire calibrating rod can enter the pressure nail hole 1-5 on the intramedullary nail 1 through the central hole of the intramedullary nail 1. The positioning handle 5 is sequentially provided with a tension nail drill sleeve 13, an anti-rotation locking nail guide hole 14 and a pressure nail drill sleeve 6 from top to bottom, which are respectively opposite to the tension nail holes 1-4, the anti-rotation locking nail holes 1-6 and the pressure nail holes 1-5 on the intramedullary nail 1.
In order to improve the operation efficiency, the intramedullary nail connecting rod 5-1 is connected with the intramedullary nail 1 through a buckle type quick connector which mainly comprises two hooks 23, a key push rod 18, a connecting plate 19 and two trigger ejector rods 20 which are arranged in an inner hole of the intramedullary nail connecting rod 5-1, hook handles of the two hooks 23 are inserted into the inner hole of the intramedullary nail connecting rod 5-1 from bottom to top, hook heads respectively correspond to clamping grooves 1-3 on the inner walls of two sides of a positioning hole 1-1 on the upper end surface of the intramedullary nail 1, the middle part of each hook handle is rotatably connected with the intramedullary nail connecting rod 5-1 through a rotating shaft 22, the upper end of each hook handle is connected with the hole wall of the inner hole of the intramedullary nail connecting rod 5-1 through a spring 21, and in a natural state, the hook heads of the hooks 23 can rotate outwards around the rotating shaft 22 and are clamped into the corresponding clamping grooves 1-3 through the elasticity of the spring 21, one end of each of the two trigger ejector rods 20 is fixedly connected with the connecting plate 19, and the other end of each of the two trigger ejector rods is in sliding contact with the inclined surface at the upper end of the hook handle of each of the two hooks 23, so that when the trigger ejector rods 20 extrude the inclined surfaces at the upper ends of the hook handles under the action of external force, the hook heads of the hooks 23 rotate inwards and are separated from the clamping grooves 1-3, and meanwhile, the springs 21 are compressed. The key push rod 18 is parallel to the trigger push rod 20, one end of the key push rod is connected with the connecting plate 19, the other end of the key push rod extends out of the inner hole of the intramedullary nail connecting rod 5-1 and is fixed with a key 15, and the trigger push rod 20 can extrude the inclined plane at the upper end of the hook handle of the hook 23 by pressing the key 15, so that the hook head is separated from the clamping groove 1-3.
Referring to fig. 1 and 2, when the fracture line passes through the tuberosity top (lesser trochanter) of the femur, the fracture end and the diaphysis part are in a free state due to small binding force, and when the nail hole is formed at the proximal end of the femur, the hole-opening tool often cannot effectively cut the fracture end, so that the intramedullary nail 1 interferes with the fracture end after being implanted, the fracture end cannot be attached to the femoral shaft part, and the fracture line at the lesser trochanter is spread. The invention adopts cutting, grinding and other modes to ensure that one side of the upper end of the intramedullary nail 1 opposite to the femoral head is contracted towards the central line direction of the intramedullary nail 1, thereby avoiding the interference with the fracture end, ensuring that the fracture line at the lesser trochanter can not be propped open, and well solving the problem that the healing is influenced because the fracture line is propped open.
After the upper end of the intramedullary nail 1 is cut and ground, the cross section of the intramedullary nail can be D-shaped, namely, only one side corresponding to the femoral head is cut and ground; or oblate (as shown in fig. 4), that is, the side of the intramedullary nail 1 corresponding to the femoral head and the opposite side are cut and ground simultaneously, so that the upper end of the intramedullary nail 1 can be inclined towards one side of the femoral shaft, and the reduction of the fracture end is facilitated.
The screw rod of the pressure screw 2 is provided with a through hole matched with the tension screw 3. The front ends of the pressure nail 2 and the tension nail 3 are respectively provided with a pressurizing thread, so that the pressure nail 2 and the tension nail 3 can be firmly connected with the fracture broken end, and the tension nail 3 is matched with the intramedullary nail 1 through the threads, so that the connection reliability can be improved.
The lower end of the intramedullary nail 1 is tapered, which can disperse the stress borne by the femoral shaft and prevent the fracture of the femoral shaft due to overlarge local stress.
When the femur of a patient is internally fixed, firstly, the intramedullary nail 1 is connected with the intramedullary nail connecting rod 5-1 on the positioning handle 5, the hammering table 16 is arranged on the intramedullary nail connecting rod 5-1, and then the intramedullary nail 1 is hammered into the medullary cavity of the femur by hammering the hammering table 16.
When the intramedullary nail 1 is connected with the intramedullary nail connecting rod 5-1, the key 15 is pressed, the intramedullary nail 1 is butted with the intramedullary nail connecting rod 5-1, and then the key 15 is released, so that the rapid connection of the intramedullary nail 1 and the intramedullary nail connecting rod 5-1 can be realized; when the intramedullary nail 1 needs to be separated from the intramedullary nail connecting rod 5-1, the button 15 is pressed down, and the intramedullary nail 1 automatically falls off from the intramedullary nail connecting rod 5-1.
After the intramedullary nail 1 is implanted, the Kirschner wire guide sleeve 7 is inserted into the pressure nail drill sleeve 6, then the Kirschner wire 9 is driven into the human body under the guiding action of the Kirschner wire guide sleeve 7, then the Kirschner wire guide sleeve 7 is taken out, and the Kirschner wire 9 pointing to the center of the femoral head and the pressure nail drill sleeve 6 are used for guiding to implant the pressure nail into the bone. In order to prevent the kirschner wire 9 from deviating upwards in the process of driving into the cortical bone, the kirschner wire calibration rod 12 can be screwed into the threaded hole 5-2 on the intramedullary nail connecting rod 5-1, the lower end of the kirschner wire calibration rod 12 is inserted into the central hole of the intramedullary nail 1 and is propped against the upper part of the kirschner wire 9, the kirschner wire 9 is prevented from deviating upwards by the kirschner wire calibration rod 12, the front end of the kirschner wire 9 is ensured to point to the center of the femoral head, and the kirschner wire calibration rod 12 is immediately removed after the kirschner wire 9 is driven into the human body. When the tension nail 3 and the anti-rotation locking nail 4 are implanted, the femur can be drilled under the guiding action of the tension nail drill sleeve 13 and the anti-rotation locking nail guide hole 14, so that the accuracy of the drilling direction is ensured.
The hammering table 16 is connected with the intramedullary nail connecting rod 5-1 through a slot, and the assembly and disassembly are very convenient. The upper end of the kirschner wire calibration rod 12 is provided with a rotating handle 17, which is convenient for the operation of the kirschner wire calibration rod 12. In order to enhance the blocking effect of the kirschner wire calibration rod 12 on the kirschner wire 9, the lower end of the kirschner wire calibration rod 12 is designed to be round, and the diameter of the kirschner wire calibration rod 12 is at least twice of the diameter of the kirschner wire 9.
The lower part of the hook head of the hook 23 is provided with a sliding inclined plane corresponding to the inner edge of the hole opening of the positioning hole 1-1 on the upper end surface of the intramedullary nail 1, so that the connection between the intramedullary nail 1 and the intramedullary nail connecting rod 5-1 is facilitated.
The pressure nail drill bushing 6 and the tension nail drill bushing 13 both penetrate through a through hole in the positioning handle 5 and are in transition fit with the positioning handle 5, and the Kirschner wire guide sleeve 7 is in transition fit with the pressure nail drill bushing 6, so that the disassembly and the assembly are convenient, and the assembly precision can be ensured.
The invention can prevent the kirschner wire from upwardly deviating when being driven into the cortical bone, thereby improving the operation quality and the treatment effect, and can save the operation time and improve the operation efficiency while ensuring the connection firmness by arranging the buckle type quick connector.
Claims (10)
1. The utility model provides a fracture fitting nail internal fixation system between femoral trochanter, characterized by, including location handle (5), intramedullary nail (1), pressure nail (2), pulling force nail (3) and prevent revolving locking nail (4), the upper end of location handle (5) is equipped with connecting rod (5-1), connecting rod (5-1) is connected with the upper end of intramedullary nail (1) through buckle formula quick-operation joint, the lower extreme of intramedullary nail (1) inserts in the medullary cavity of thighbone, and the upper end is located thighbone near end, the front end of pressure nail (2) passes pressure nail hole (1-5) on intramedullary nail (1) and inserts femoral head (11) along the direction of pressure bone trabecula, the front end of pulling force nail (3) passes pressure nail hole (1-5) on intramedullary nail (1) and inserts femoral head (11) along the direction of tension bone trabecula, prevent revolving locking nail (4) pass on intramedullary nail (1) and prevent revolving locking hole (1-6) And the femoral shaft is provided with a pressure nail (2), a tension nail (3) and a guiding device of the anti-rotation locking nail (4) on the positioning handle (5).
2. The internal fixation system of the femoral intertrochanteric fracture conformal nail according to claim 1, characterized in that the snap-fit type quick connector comprises two hooks (23), a key push rod (18), a connecting plate (19) and two trigger push rods (20) which are arranged in an inner hole of the connecting rod (5-1), hook handles of the two hooks (23) are inserted into the inner hole of the connecting rod (5-1) from bottom to top, hook heads respectively correspond to clamping grooves (1-3) on inner walls on two sides of a positioning hole (1-1) on the upper end surface of the intramedullary nail (1), the middle part of each hook handle is rotatably connected with the connecting rod (5-1) through a rotating shaft (22), the upper end of each hook handle is connected with the hole wall of the inner hole of the connecting rod (5-1) through a spring (21), so that the hook heads of the hooks (23) are clamped into the corresponding clamping grooves (1-3) through the elasticity of the spring (21), one ends of the two trigger ejector rods (20) are fixedly connected with the connecting plate (19), the other ends of the two trigger ejector rods are respectively in sliding contact with inclined planes at the upper ends of the hook handles of the two hooks (23), so that hook heads of the hooks (23) are separated from the clamping grooves (1-3) through the trigger ejector rods (20), one end of the key push rod (18) is connected with the connecting plate (19), and the other end of the key push rod extends out of an inner hole of the connecting rod (5-1) and is fixed with a key (15).
3. The intramedullary fixation system of claim 1 or 2, wherein the intramedullary nail (1) is contracted in a direction of a central line of the intramedullary nail (1) on a side of an upper end of the intramedullary nail opposite to the femoral head (11).
4. The intramedullary fixation system of claim 3, characterized in that the cross-sectional shape of the upper end of the intramedullary nail (1) is D-shaped or oblate.
5. The intratrochanteric fracture conformal nail fixing system of claim 4, wherein the shank of the pressure nail (2) is provided with a through hole, the tension nail (3) passes through the through hole, the front ends of the pressure nail (2) and the tension nail (3) are provided with pressurizing threads, and the tension nail (3) is matched with the intramedullary nail (1) through threads.
6. The internal fixation system for the intertrochanteric fracture conformal nail according to claim 5, wherein the guiding device on the positioning handle (5) comprises a tension nail drill sleeve (13), an anti-rotation locking nail guiding hole (14) and a pressure nail drill sleeve (6) which are sequentially arranged from top to bottom, a Kirschner wire guiding sleeve (7) is movably sleeved in the pressure nail drill sleeve (6), and a Kirschner wire (9) for guiding the pressure nail (2) to be implanted into a bone is driven into a femoral head through the Kirschner wire guiding sleeve (7) and the pressure nail holes (1-5) on the intramedullary nail (1).
7. The internal fixation system for the femoral intertrochanteric fracture conformal nail is characterized in that the pressure nail drill sleeve (6) and the tension nail drill sleeve (13) both penetrate through a through hole in the positioning handle (5) and are in transition fit with the positioning handle (5), and the Kirschner wire guide sleeve (7) is in transition fit with the pressure nail drill sleeve (6).
8. The intramedullary fixation system of claim 7, further comprising a kirschner wire calibration rod (12), wherein the kirschner wire calibration rod (12) passes through the through hole of the connecting rod (5-1) and is matched with the connecting rod (5-1) through threads, and the lower end of the kirschner wire calibration rod (12) is inserted into the central hole of the intramedullary nail (1) and is pressed against the kirschner wire (9) driven into the pressure nail hole (1-5).
9. The internal fixation system for the femoral intertrochanteric fracture form-fitting nail according to claim 8, characterized in that the upper part of the connecting rod (5-1) is provided with a hammering table (16), and the hammering table (16) is connected with the connecting rod (5-1) through a slot.
10. The internal fixation system of the femoral intertrochanteric fracture profile screw of claim 9, characterized in that the upper end of the kirschner wire calibration rod (12) is provided with a rotating handle (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110967909.4A CN113813036A (en) | 2021-08-23 | 2021-08-23 | Shape-fitting nail internal fixation system for intertrochanteric fracture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110967909.4A CN113813036A (en) | 2021-08-23 | 2021-08-23 | Shape-fitting nail internal fixation system for intertrochanteric fracture |
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| Publication Number | Publication Date |
|---|---|
| CN113813036A true CN113813036A (en) | 2021-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110967909.4A Pending CN113813036A (en) | 2021-08-23 | 2021-08-23 | Shape-fitting nail internal fixation system for intertrochanteric fracture |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114392014A (en) * | 2021-12-31 | 2022-04-26 | 燕山大学 | Femoral stem, design method and installation tool |
| CN114392014B (en) * | 2021-12-31 | 2024-05-14 | 燕山大学 | Femur stem, design method and installation tool |
-
2021
- 2021-08-23 CN CN202110967909.4A patent/CN113813036A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114392014A (en) * | 2021-12-31 | 2022-04-26 | 燕山大学 | Femoral stem, design method and installation tool |
| CN114392014B (en) * | 2021-12-31 | 2024-05-14 | 燕山大学 | Femur stem, design method and installation tool |
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