Medical orthopedic nail extractor and nail extracting method thereof

Abstract

The invention discloses a medical nail extractor for the orthopedics department. The medical nail extractor comprises a claw rod, an ejector rod and a locking handle. A center hole is formed in the hook claw rod, the ejector rod is inserted into the center hole in a pulling-out mode, a plurality of elastic hook claws extending in the axial direction are distributed on the periphery of one end of the hook claw rod, claw heads are arranged on the outer wall faces of the elastic hook claws, and the locking handle is connected to the hook claw rod in a threaded mode and moves in the axial direction. The thread direction of the locking handle is opposite to the thread direction of the orthopedic screw, and a follow-up extrusion head is arranged at one end, facing the elastic claw, of the locking handle; the invention further discloses a nail taking method of the medical nail taking device for the orthopedics department. The screw extractor is simple in structure and high in specificity, and hollow medical screws remaining in bones can be extracted conveniently; the nail taking method is convenient to operate, simple in step, easy to master by surgeons, high in safety, complete in overall function and high in practicability.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and more specifically, to a medical orthopedic nail remover and a nail removal method thereof. Background Art

[0002] Bone screws used in orthopedic surgery are difficult to remove due to the long implantation time. If the bone screw breaks during removal, the remaining part cannot be removed with the same tool, which will result in the remaining part of the bone screw being unable to be removed. Figure 7 The figure shows a schematic diagram of the structure of an existing medical orthopedic screw. It is a standard hollow screw with a right-handed thread on the outer wall, a hollow rod, a self-tapping head end with three blades, and a blade groove formed between two adjacent blades. When the lower half of the screw is broken in the bone, it is extremely difficult to remove. Based on this, the present invention proposes a medical orthopedic screw remover and a method for removing the screw. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a medical orthopedic nail remover and a nail removal method thereof.

[0004] In order to solve the above technical problems, the purpose of the present invention is achieved as follows: the medical orthopedic nail remover involved in the present invention comprises a hook claw rod, a push rod and a locking handle; the hook claw rod is provided with a center hole, the push rod can be pulled out and inserted into the center hole, one end of the hook claw rod is provided with a plurality of elastic hook claws extending along the axial direction, the outer wall surface of the elastic hook claw is provided with a claw head, the locking handle is threadedly connected to the hook claw rod and moves axially, the thread direction on the locking handle is opposite to the thread direction on the orthopedic screw, and the end of the locking handle facing the elastic hook claw has an extrusion head for follow-up.

[0005] The present invention is further configured as follows: a first limiting portion for limiting rearward movement of the locking handle is provided on the hook rod, and a second limiting portion for limiting forward movement of the hook rod is provided on the locking handle, and the second limiting portion blocks the front of the first limiting portion.

[0006] The present invention is further configured such that: a hand-holding portion is provided at the tail of the push rod.

[0007] The present invention is further configured such that: the head of the extrusion head has a tooth-shaped protrusion.

[0008] The present invention is further configured such that the head of the claw head and the head of the push rod are both provided with a guide portion.

[0009] The present invention also relates to a method for removing nails using a medical orthopedic nail remover.

[0010] A method for removing nails from a medical orthopedic nail remover comprises the following steps:

[0011] S1. Insert the front section of the hook rod with the locking handle into the hole of the broken orthopedic screw until the elastic hook extends out of the hole of the orthopedic screw;

[0012] S2. Insert the push rod into the center hole of the hook rod until the head of the push rod extends into the elastic hook position;

[0013] S3. Rotate the locking handle relative to the claw rod, and rotate the locking handle to move toward the elastic claw until the broken orthopedic screw is locked by the extrusion head and the claw head, and the claw head is embedded in the cutting edge groove at the end of the orthopedic screw;

[0014] S4. Continue to rotate the locking handle in the same direction. The locking handle will drive the entire nail remover and the connected orthopedic screws to perform a nail removal operation to complete the removal of the broken orthopedic screws.

[0015] In summary, the present invention has the following beneficial effects:

[0016] 1. The medical orthopedic screw remover of the present invention has a simple structure, is convenient for removing hollow medical screws remaining in the bone, and has strong speciality.

[0017] 2. The nail removal method of the medical orthopedic nail remover involved in the present invention is easy to operate, has simple steps, is easy for surgeons to master, and is highly safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0020] Figure 3 yes Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0021] Figure 4 yes Figure 2 The enlarged structural diagram of the middle B part;

[0022] Figure 5 yes Figure 2 The enlarged structural diagram of the middle C part;

[0023] Figure 6 It is a partial structural schematic diagram of the present invention;

[0024] Figure 7 This is a schematic diagram of the structure of an existing medical orthopedic screw;

[0025] Figure 8 is a schematic diagram of step 1 of a nail removal method according to the present invention;

[0026] Fig. 9is a schematic diagram of step 2 of the nail removal method according to the present invention;

[0027] Fig.10 is a schematic diagram of step three of the nail removal method according to the present invention;

[0028] Fig.11 It is a schematic diagram of step 4 of the nail removal method according to the present invention. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the preferred embodiments of the present invention are described below in conjunction with specific embodiments, but it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the patent requirements of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0030] The present invention is further described below in conjunction with the accompanying drawings and preferred embodiments.

[0031] Example 1

[0032] See also Figures 1 to 7 As shown, a medical orthopedic nail remover involved in this embodiment includes a hook claw rod 100, a push rod 200 and a locking handle 300; the hook claw rod 100 is provided with a center hole 101, and the push rod 200 can be pulled out and inserted into the center hole 101, and one end of the hook claw rod 100 is arranged with a plurality of elastic hook claws 102 extending along the axial direction, and the outer wall surface of the elastic hook claw 102 is provided with a claw head 103, and the locking handle 300 is threadedly connected to the hook claw rod 100 and moves axially, and the thread direction on the locking handle 300 is opposite to the thread direction on the orthopedic screw, and the end of the locking handle 300 facing the elastic hook claw has an extrusion head 301 for follow-up.

[0033] Furthermore, the hook rod 100 is provided with a first limiting portion 104 for limiting the locking handle from moving backward, and the locking handle 300 is provided with a second limiting portion 302 for limiting the hook rod from moving forward, and the second limiting portion 302 blocks the front of the first limiting portion 104 .

[0034] Furthermore, a handle 201 is provided at the tail of the push rod 200 .

[0035] Furthermore, the head of the extrusion head 301 has a tooth-shaped protrusion 3011 .

[0036] Furthermore, the head of the claw head 103 and the head of the push rod 200 are both provided with a guide portion (not marked).

[0037] See also Figures 7 to 11As shown, this embodiment also relates to a nail removal method of a medical orthopedic nail remover, comprising the following steps:

[0038] S1. Insert the front section of the hook rod with the locking handle into the hole of the broken orthopedic screw until the elastic hook extends out of the hole of the orthopedic screw;

[0039] S2. Insert the push rod into the center hole of the hook rod until the head of the push rod extends into the elastic hook position;

[0040] S3. Rotate the locking handle relative to the claw rod, and rotate the locking handle to move toward the elastic claw until the broken orthopedic screw is locked by the extrusion head and the claw head, and the claw head is embedded in the cutting edge groove at the end of the orthopedic screw;

[0041] S4. Continue to rotate the locking handle in the same direction. The locking handle will drive the entire nail remover and the connected orthopedic screws to perform a nail removal operation to complete the removal of the broken orthopedic screws.

[0042] In this embodiment, when the screw (such as Figure 7 When a nail is broken and the remaining portion is below the bone surface and cannot be removed, the nail remover of the present invention can be used in combination with the nail removal method of the present invention to remove the broken nail with the remaining portion below the bone surface.

[0043] This technical solution provides a more reasonable solution to the technical problem of difficult removal of broken nails. This technical solution is mainly for the removal of broken nails with holes in the center of bone nails, and a set of non-standard medical orthopedic nail removers is designed. It first uses the front end of the hook claw rod with a locking handle threadedly connected to penetrate the hole of the broken nail until it penetrates, then takes out the top rod and inserts it into the hook claw rod to expand the front end of the hook claw rod, and then turns the handle to clamp the broken nail front and back, and finally drives the broken nail to be screwed off the bone by continuing to turn the handle to remove the broken nail.

[0044] The first limiting portion 104 cooperates with the second limiting portion 302 to provide a limiting function when the hook rod 100 moves axially relative to the locking handle 300 or the locking handle 300 moves axially relative to the hook rod 100 .

[0045] The hand-held portion 201 is provided to facilitate manipulation of the push rod 200 .

[0046] Among them, by setting the tooth-shaped protrusion 3011, the biting friction is increased, so that the broken nail is clamped more firmly.

[0047] Among them, the guide portion of the head of the claw head 103 is set to facilitate the insertion of the front section of the hook claw rod 100; the guide portion of the head of the push rod 200 is set to facilitate the insertion of the push rod 200.

[0048] The medical orthopedic nail remover involved in the present invention has a simple structure, is convenient for removing hollow medical screws remaining in the bone, and has strong specialization; the nail removal method of the medical orthopedic nail remover involved in the present invention is easy to operate, has simple steps, is easy for surgeons to master, has high safety, has complete overall functions, and is highly practical.

[0049] Unless otherwise specified, in the present invention, the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicating orientation or positional relationship are based on the orientation or positional relationship actually shown, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the orientation or positional relationship in the present invention are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood in combination with the embodiments and according to specific circumstances.

[0050] Unless otherwise clearly specified and limited, in the present invention, the terms "disposed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A medical orthopedic nail remover, characterized in that: It includes a hook claw rod, a push rod and a locking handle; the hook claw rod is provided with a center hole, the push rod can be pulled out and inserted into the center hole, one end of the hook claw rod is provided with a plurality of elastic hook claws extending along the axial direction, the outer wall surface of the elastic hook claw is provided with a claw head, the locking handle is threadedly connected to the hook claw rod and moves axially, the thread direction on the locking handle is opposite to the thread direction on the orthopedic screw, and the end of the locking handle facing the elastic hook claw has an extrusion head for follow-up.

2. The medical orthopedic nail remover according to claim 1, characterized in that: The hook claw rod is provided with a first limiting portion for limiting the locking handle from moving backward, and the locking handle is provided with a second limiting portion for limiting the hook claw rod from moving forward, and the second limiting portion blocks the front of the first limiting portion.

3. The medical orthopedic nail remover according to claim 2, characterized in that: A hand-holding portion is provided at the tail of the push rod.

4. The medical orthopedic nail remover according to claim 3, characterized in that: The head of the extrusion head has a tooth-shaped protrusion.

5. The medical orthopedic nail remover according to claim 4, characterized in that: The head of the claw head and the head of the push rod are both provided with a guide portion.

6. A method for removing nails using the medical orthopedic nail remover according to claim 5, characterized in that: The following steps are involved: S1. Insert the front section of the hook rod with the locking handle into the hole of the broken orthopedic screw until the elastic hook extends out of the hole of the orthopedic screw; S2. Insert the push rod into the center hole of the hook rod until the head of the push rod extends into the elastic hook position; S3. Rotate the locking handle relative to the claw rod, and rotate the locking handle to move toward the elastic claw until the broken orthopedic screw is locked by the extrusion head and the claw head, and the claw head is embedded in the cutting edge groove at the end of the orthopedic screw; S4. Continue to rotate the locking handle in the same direction. The locking handle will drive the entire nail remover and the connected orthopedic screws to perform a nail removal operation to complete the removal of the broken orthopedic screws.

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