Six-tip double-claw type reaming sleeve

Abstract

The utility model relates to the technical field of sleeves, in particular to a six-tip double-claw type reaming sleeve. According to the technical scheme, the tip part comprises a supporting cylinder, an outer claw and an inner claw, the supporting cylinder is fixedly installed at the end, away from an impacted part, of a main sleeve, the outer claw is fixedly installed at the end of the supporting cylinder, the inner claw is fixedly installed at the position, close to the outer claw, of the inner arc face of the supporting cylinder, and the outer claw and the inner claw form a double-claw structure. The outer claw and the inner claw are inserted into sclerotin by hammering the hit part, so that the stability of a fracture broken end can be kept in the insertion process of the marrow expanding device, the marrow expanding sleeve is simple in design and simple and convenient to operate, and extra complex surgical skills or equipment is not needed. Meanwhile, due to the fact that operation risks and complications such as infection and thrombosis caused by broken end separation are reduced, the operation safety of a patient is improved, the outer claw is matched with the anatomical features of femoral marrow cavities of different patients, and the universality and adaptability of the marrow expanding tool are improved.

Description

Technical Field

[0001] This utility model relates to the field of sleeve technology, and in particular to a six-pointed double-claw type reaming sleeve. Background Technology

[0002] Proximal femoral anteroposterior (PFNA) internal fixation is a common surgical method for treating intertrochanteric fractures of the femur. It is characterized by minimal trauma, secure fixation, and protection against rotation and cutting, making it suitable for elderly patients with osteoporosis. The surgery is usually performed on a traction bed with the patient in a supine position, the affected limb adducted and internally rotated, and the unaffected limb abducted and flexed at the knee for fixation.

[0003] Many types of fractures have fracture lines at the apex of the greater trochanter. When performing PFNA internal fixation, it is necessary to enlarge the hole and medullary cavity from that location or an adjacent site before inserting the main nail. This process often causes separation of the fracture ends, delays fracture healing, or even causes nonunion, preventing patients from engaging in early weight-bearing exercises.

[0004] Doctors have developed some surgical techniques, such as using hooks, towel clamps, or bone holders to maintain reduction, or indirectly maintaining reduction through external compression. However, these methods are complex, invasive, and high-risk, requiring multiple fluoroscopy sessions. Utility Model Content

[0005] The purpose of this invention is to address the problems of complex operation, significant trauma, and high risk in the prior art by proposing a six-pointed double-claw reaming sleeve.

[0006] The technical solution of this utility model is: a six-pointed double-claw type spinal cannula sleeve, including a main sleeve, a striking part is fixedly installed on the top of the main sleeve, and a handle is fixedly installed on the outer arc surface of the striking part;

[0007] The tip includes a support cylinder, an outer claw, and an inner claw. The support cylinder is fixedly installed at the end of the main sleeve away from the impacted part. The outer claw is fixedly installed at the end of the support cylinder. The inner claw is fixedly installed at the inner arc surface of the support cylinder and near the outer claw. The outer claw and the inner claw form a double claw structure.

[0008] A medullary expander is inserted through the center of the main sleeve, and both the outer and inner claws are inserted into the human bone.

[0009] Optionally, the outer claw is longer than the inner claw, there is an angle between the outer claw and the inner claw, and the ends of both the outer claw and the inner claw are pointed.

[0010] Optionally, six external claws are provided and are distributed in a ring at equal angles at the end of the main sleeve, and the number of internal claws is the same as the number of external claws.

[0011] Optionally, the length of the outer claw is set to be between . mm and . mm, and the length of the inner claw is between . mm and . mm.

[0012] Optionally, the support cylinder is provided with a separation prompting component, which includes an inner friction ring, a guide slider, a straight rod, and a prompting block. The inner friction ring slides up and down on the inner arc surface of the support cylinder. The guide slider is fixedly installed on the outer arc surface of the inner friction ring. The straight rod is fixedly installed on the top of the guide slider. The prompting block is fixedly installed on the top of the straight rod. The inner arc surface of the inner friction ring is in contact with the end of the spinal reamer.

[0013] Optionally, the straight rod extends from the support cylinder into the interior of the main sleeve, with the end of the straight rod protruding from the impacted part, and the indicator block sliding up and down on the outer arc surface of the impacted part.

[0014] Optionally, the inner arc surface of the support cylinder is provided with a guide groove, and the inner friction ring slides up and down in the guide groove.

[0015] Optionally, the reamer enters from the impacted area and exits from the support tube.

[0016] Compared with the prior art, this application includes at least one of the following beneficial technical effects:

[0017] This invention uses a hammer to insert the outer and inner claws into the bone by striking the impacted part, thus maintaining the stability of the fracture ends during the insertion of the reamer. The reamer sleeve has a simple design and is easy to operate, requiring no additional complex surgical techniques or equipment. At the same time, by reducing the surgical risks and complications caused by fracture end separation, such as infection and thrombosis, the patient's surgical safety is improved.

[0018] Furthermore, the outer claw adapts to the anatomical features of the femoral medullary cavity of different patients, improving the versatility and adaptability of the reaming tool, while also enhancing the stability of the interlocking. The inner claw reduces potential damage to sensitive tissues within the medullary cavity during reaming, while also enhancing the guidance and stability of the tip within the medullary cavity.

[0019] Furthermore, since the height of the guide groove is the same as the length of the reamer drill bit, when the inner friction ring moves from the lowest point to the highest point of the guide groove, the indicator block moves upward to indicate to the doctor that the reamer drill bit has completely detached from the bone, allowing the reamer to be quickly removed and the fixation post for fixing the bone to be inserted in time, reducing surgical risks. Attached Figure Description

[0020] Figure 1 A schematic diagram of the overall structure of one embodiment of the present invention is provided;

[0021] Figure 2A schematic diagram of the inner claw structure of one embodiment of the present invention is provided;

[0022] Figure 3 for Figure 2 A schematic diagram of the guide slider structure in part A;

[0023] Figure 4 A schematic diagram of a straight rod structure according to an embodiment of the present invention is provided.

[0024] Reference numerals: 1. Main sleeve; 2. Impacted part; 3. Grip; 4. Tip; 41. Support sleeve; 42. Outer claw; 43. Inner claw; 5. Separation indicator assembly; 51. Guide groove; 52. Inner friction ring; 53. Guide slider; 54. Straight rod; 55. Indicator block. Detailed Implementation

[0025] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0026] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0027] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] Example 1

[0031] This embodiment proposes a six-pointed double-claw type myeloid reamer sleeve, such as... Figure 1 As shown, it includes a main sleeve 1, a strike-receiving part 2 is fixedly installed on the top of the main sleeve 1, a handle 3 is fixedly installed on the outer arc surface of the strike-receiving part 2, and a spinal expander is inserted through the center of the main sleeve 1.

[0032] like Figure 2 and Figure 3 As shown, the tip 4 is provided at the end of the tip 4. The tip 4 includes a support cylinder 41, an outer claw 42 and an inner claw 43. The support cylinder 41 is fixedly installed at the end of the main sleeve 1 away from the impacted part 2. The reamer enters from the impacted part 2 and exits from the support cylinder 41. The main sleeve 1 and the support cylinder 41 provide support for the reamer and stabilize its position.

[0033] An outer claw 42 is fixedly installed at the end of the support cylinder 41, and an inner claw 43 is fixedly installed at the inner arc surface of the support cylinder 41 and near the outer claw 42. The outer claw 42 and the inner claw 43 form a double claw structure. The length of the outer claw 42 is longer than that of the inner claw 43. There is an included angle between the outer claw 42 and the inner claw 43. The ends of both the outer claw 42 and the inner claw 43 are made into pointed shapes. There are six outer claws 42, which are distributed in a ring at equal angles at the end of the main sleeve 1. The number of inner claws 43 is the same as the number of outer claws 42.

[0034] By hammering the impacted part 2, the outer claw 42 and inner claw 43 are inserted into the bone, thus maintaining the stability of the fracture ends during the insertion of the medullary reamer.

[0035] The length of the outer claw 42 is set between 4.0 mm and 7.0 mm. This design range is intended to broadly adapt to the femoral medullary cavity anatomy of different patients, improve the versatility and adaptability of the reaming tool, and also enhance the stability of the fit. The length of the inner claw 43 is finely controlled between 2.0 mm and 3.5 mm. This design is intended to reduce potential damage to sensitive tissues in the medullary cavity during reaming, while enhancing the guidance and stability of the tip in the medullary cavity.

[0036] By increasing the contact area between the sleeve and the proximal femur and adopting a bottom-pointed design, this invention ensures the continuous stability of the fracture ends during medullary reaming and main nail insertion, effectively preventing fracture end separation and providing a favorable environment for fracture healing.

[0037] Because the fracture ends are effectively stabilized during surgery, blood circulation to the fracture site is maintained, which is conducive to fracture healing. At the same time, it avoids delayed healing or even nonunion caused by fracture end separation, thus accelerating the patient's recovery process.

[0038] The stable reamer of this application features a simple design and is easy to operate, requiring no additional complex surgical techniques or equipment. At the same time, by reducing surgical risks and complications caused by fragment separation, such as infection and thrombosis, patient safety is significantly improved.

[0039] In this embodiment, the outer claw 42 and inner claw 43 are inserted into the bone by striking the impacted part 2, which can maintain the stability of the fracture ends during the insertion of the medullary reamer. The outer claw 42 is adapted to the femoral medullary cavity anatomy of different patients, which improves the versatility and adaptability of the medullary reamer tool, and also enhances the firmness of the interlocking. The inner claw 43 reduces the potential damage to sensitive tissues in the medullary cavity during medullary reaming, and at the same time enhances the guidance and stability of the tip in the medullary cavity.

[0040] Example 2

[0041] Based on Example 1, this example proposes a six-pointed double-claw type reamer sleeve, such as... Figure 3 and Figure 4 As shown, a separation prompting component 5 is provided inside the support cylinder 41. The separation prompting component 5 includes an inner friction ring 52, a guide slider 53, a straight rod 54, and a prompting block 55. The inner friction ring 52 slides up and down on the inner arc surface of the support cylinder 41. The guide slider 53 is fixedly installed on the outer arc surface of the inner friction ring 52. The straight rod 54 is fixedly installed on the top of the guide slider 53. The prompting block 55 is fixedly installed on the top of the straight rod 54. The inner arc surface of the inner friction ring 52 is in contact with the end of the spinal reamer.

[0042] Since the position of the reamer cannot be observed after the sleeve is inserted into the bone, the drill bit at the end of the reamer is thicker than the flexible rod. When the drill bit at the end of the reamer is pulled out of the bone, it will cause the internal friction ring 52 to move, which in turn causes the guide slider 53 and the straight rod 54 to move, thereby changing the position of the prompting block 55 to indicate that the reamer has been pulled out of the bone. This allows the reamer to be pulled out quickly, improving the reaming efficiency.

[0043] A straight rod 54 extends from the support cylinder 41 into the interior of the main sleeve 1, with its end protruding from the impact-receiving part 2. The indicator block 55 slides up and down on the outer arc surface of the impact-receiving part 2. The main sleeve 1, the support cylinder 41, and the impact-receiving part 2 guide the straight rod 54.

[0044] The inner arc surface of the support cylinder 41 is provided with a guide groove 51, and the inner friction ring 52 slides up and down in the guide groove 51. The height of the guide groove 51 is the same as the length of the reamer drill bit. When the inner friction ring 52 moves from the lowest point to the highest point of the guide groove 51, the reamer drill bit is completely detached from the bone.

[0045] In this embodiment, since the height of the guide groove 51 is the same as the length of the reamer drill bit, when the inner friction ring 52 moves from the lowest point to the highest point of the guide groove 51, the prompting block 55 moves upward to prompt the doctor that the reamer drill bit has completely detached from the bone, so that the reamer can be quickly removed and the fixation post for fixing the bone can be inserted in time.

[0046] The procedure is essentially the same as the original PFNA procedure. The original PFNA procedure is as follows: First, under spinal or general anesthesia, the fracture ends are tractioned and reduced on a traction bed; the position is confirmed to be good under C-arm fluoroscopy, then disinfected and draped; a lateral longitudinal incision is made centered on the tip of the greater trochanter as the PFNA insertion point, and then the guide needle is inserted from the tip of the greater trochanter into the distal femoral medullary canal, with good position confirmed under C-arm fluoroscopy; then the medullary canal is reamed, and the PFNA is implanted. After implantation, C-arm fluoroscopy is also required; then proximal and distal locking are performed. After locking, the fracture position and internal fixation position are confirmed to be good under C-arm fluoroscopy. If there are no problems, the skin can be sutured layer by layer. The difference is that during medullary canal reaming, a hammer is used to drive the reamer sleeve into the bone.

[0047] The above specific embodiments are merely several optional embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A six-pointed double-claw type reamer sleeve, characterized in that, include: Main sleeve (1), the top of the main sleeve (1) is fixedly installed with a strike-receiving part (2), and the outer arc surface of the strike-receiving part (2) is fixedly installed with a handle (3); The tip (4) includes a support cylinder (41), an outer claw (42) and an inner claw (43). The support cylinder (41) is fixedly installed at one end of the main sleeve (1) away from the impacted part (2). The outer claw (42) is fixedly installed at the end of the support cylinder (41). The inner claw (43) is fixedly installed at the inner arc surface of the support cylinder (41) and near the outer claw (42). The outer claw (42) and the inner claw (43) form a double claw structure. A medullary expander is inserted through the center of the main sleeve (1), and both the outer claw (42) and the inner claw (43) are inserted into the human bone.

2. The six-pointed double-claw type reamer sleeve according to claim 1, characterized in that: The outer claw (42) is longer than the inner claw (43), and there is an angle between the outer claw (42) and the inner claw (43). The ends of the outer claw (42) and the inner claw (43) are both pointed.

3. The six-pointed double-claw type reamer sleeve according to claim 1, characterized in that: The outer claws (42) are provided in six numbers and are distributed in a ring at equal angles at the end of the main sleeve (1). The number of inner claws (43) is the same as the number of outer claws (42).

4. The six-pointed double-claw type reamer sleeve according to claim 1, characterized in that: The length of the outer claw (42) is set to be between 4.0 mm and 7.0 mm, while the length of the inner claw (43) is between 2.0 mm and 3.5 mm.

5. A six-pointed double-claw type reamer sleeve according to claim 1, characterized in that: The support cylinder (41) is equipped with a separation prompting component (5). The separation prompting component (5) includes an inner friction ring (52), a guide slider (53), a straight rod (54), and a prompting block (55). The inner friction ring (52) slides up and down on the inner arc surface of the support cylinder (41). The guide slider (53) is fixedly installed on the outer arc surface of the inner friction ring (52). The straight rod (54) is fixedly installed on the top of the guide slider (53). The prompting block (55) is fixedly installed on the top of the straight rod (54). The inner arc surface of the inner friction ring (52) is in contact with the end of the spinal cord expander.

6. A six-pointed double-claw type reamer sleeve according to claim 5, characterized in that: The straight rod (54) extends from the support cylinder (41) into the interior of the main sleeve (1), and the end of the straight rod (54) extends from the impact part (2). The prompting block (55) slides up and down on the outer arc surface of the impact part (2).

7. A six-pointed double-claw type reamer sleeve according to claim 6, characterized in that: The inner arc surface of the support cylinder (41) is provided with a guide groove (51), and the inner friction ring (52) slides up and down in the guide groove (51).

8. A six-pointed double-claw type reamer sleeve according to claim 1, characterized in that: The spinal cord expander enters from the impacted part (2) and exits from the support tube (41).

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