CN221671802U - Nerve retractor assembly - Google Patents

Abstract

The utility model discloses a nerve retractor assembly, which is used for assisting in driving a Kirschner wire into a patient's bone. The utility model comprises a rod body, wherein two guide holes are arranged on the rod body, the two guide holes are parallel to the axis of the rod body, and the two guide holes are used for inserting the Kirschner wire; an oblique section is arranged at one end of the rod body; during use, the nerve retractor assembly provided by the utility model, on the one hand, provides a guiding effect for the use of the Kirschner wire while pulling the nerve apart by the nerve retractor, so as to facilitate accurate positioning; on the other hand, two parallel guide holes for inserting the Kirschner wire are provided on the rod body of the nerve retractor, so that when the Kirschner wire needs to be re-inserted and the position needs to be fine-tuned after passing through one of the guide holes and being inserted into the patient's bone, it is only necessary to use the inserted Kirschner wire as a rotating shaft, rotate the rod body, deflect and adjust the other guide hole to a suitable position, and then insert the second Kirschner wire through the other guide hole and be inserted into the patient's bone, so that the operation is convenient, and the adjustment process is stable and accurate.

Description

A nerve retractor assembly

Technical Field

The utility model relates to the technical field of surgical operations, in particular to a nerve retractor component.

Background Art

In orthopedics and surgery, medical workers often use Kirschner wires to fix the fracture ends when treating patients with fractures. The length of a Kirschner wire is generally about 20 centimeters, with a diameter ranging from 0.5 to 2 millimeters. It is mainly used to fix fractures with low stress, such as avulsion fractures or short fractures. In specific surgical operations, the insertion point and direction of the Kirschner wire depend entirely on the experience of medical workers, which leads to deviations in the perforation position during surgery and a low success rate of one-time needle insertion, which increases surgical risks and pain for patients. When using Kirschner wires to fix the fracture ends, it is often necessary to set a certain angle. In conventional treatment, the setting of different angles is often determined by the doctor's own experience and cannot be accurately positioned; and when the Kirschner wire is inserted into the patient's bone, it is difficult to add or fine-tune the position of the Kirschner wire near it.

Utility Model Content

In view of this, the purpose of the present invention is to overcome the deficiencies in the related art. The present invention provides a nerve retractor assembly.

The utility model provides the following technical solutions:

A nerve retractor assembly is used to assist in driving a Kirschner wire into a patient's bone, comprising a rod body, the rod body is provided with two guide holes, both of which are parallel to the axis of the rod body and are used to pass the Kirschner wire; one end of the rod body is provided with an oblique section.

As a further improvement of the above technical solution, the distance between the edges of the two guide holes is not less than 4 mm.

As a further improvement of the above technical solution, the end of the oblique section is bent in a direction away from the axis of the rod body and is provided with a hook.

As a further improvement of the above technical solution, one of the two guide holes is arranged close to the draw hook, and the other guide hole is arranged far away from the draw hook.

As a further improvement of the above technical solution, the edges of the oblique section and the hook are both provided with deburred edges.

As a further improvement of the above technical solution, an angle a is formed between the oblique section and the axis of the rod body, satisfying: 15°≤a≤25°.

As a further improvement of the above technical solution, a smooth layer is formed on the side surface of the rod body.

As a further improvement of the above technical solution, a clamping portion is provided on the peripheral side of the end of the rod body away from the oblique cross section.

As a further improvement of the above technical solution, the clamping portion is provided with anti-slip grooves.

As a further improvement of the above technical solution, the rod body is made of stainless steel or titanium alloy.

Compared with the related art, the beneficial effects of the utility model are:

During use, the nerve retractor assembly provided by the utility model can, on the one hand, provide a guide for the insertion of the Kirschner wire into the patient's bone while the nerve is being pulled away, by providing a guide hole on the rod body of the nerve retractor assembly, thereby facilitating accurate positioning, improving the insertion efficiency of the Kirschner wire, and reducing the pain of the patient during the operation; on the other hand, by providing two parallel guide holes for inserting the Kirschner wire on the rod body of the nerve retractor assembly, when the position of the Kirschner wire needs to be fine-tuned after passing through one of the guide holes and driving into the patient's bone, it is only necessary to use the inserted Kirschner wire as a rotating shaft, rotate the rod body, deflect and adjust the other guide hole to a suitable position, and then pass the second Kirschner wire through the other guide hole and drive into the patient's bone, thereby completing the insertion of the new Kirschner wire, with convenient operation and a stable and accurate adjustment process.

In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, preferred embodiments are given below and described in detail with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

FIG1 is a schematic structural diagram of a nerve retractor assembly from one perspective in one embodiment of the utility model;

FIG2 is a schematic diagram showing a front view of a nerve retractor assembly in one embodiment of the present invention;

FIG3 shows a schematic diagram of a test structure of a nerve hook assembly at one viewing angle in one embodiment of the utility model;

FIG. 4 is a schematic diagram showing a top view of the structure of a nerve retractor assembly in one embodiment of the utility model.

Description of main component symbols:

100-rod body; 110-guide hole; 120-oblique section; 130-retractor hook; 131-sharp edge removal; 140-clamping part; 150-smooth layer.

DETAILED DESCRIPTION

The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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 mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between 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.

In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

Example 1

As shown in FIG. 1 , this embodiment provides a nerve retractor assembly for assisting in driving a Kirschner wire into a patient's bone.

The nerve retractor assembly includes a rod body 100, on which two guide holes 110 are provided, both of which are parallel to the axis of the rod body 100, and both of which are used to insert the Kirschner wire. By opening two parallel guide holes 110 for inserting the Kirschner wire on the rod body 100, when the Kirschner wire needs to be fine-tuned after passing through one of the guide holes 110 and driving into the patient's bone, it is only necessary to use the inserted Kirschner wire as a rotating shaft, rotate the rod body 100, deflect and adjust the other guide hole 110 to a suitable position, and then pass the second Kirschner wire through the other guide hole 110 and drive into the patient's bone, so that the insertion of the new Kirschner wire can be completed, and the operation is convenient, and the adjustment process is stable and accurate; one end of the rod body 100 is provided with an oblique section 120, and by setting the end of the rod body 100 as the oblique section 120, it is more convenient and faster to penetrate into the patient's body close to the bone, reducing the patient's pain.

Optionally, the spacing between the edges of the two guide holes 110 is not less than 4 mm. This is because the minimum width required for the rongeur to clamp the patient's bone is 4 mm. Optionally, the spacing between the edges of the two guide holes 110 is 4 mm, which avoids the rongeur from pressing and colliding when inserting a new Kirschner wire by using the nerve retractor assembly, thereby reducing the patient's pain.

Optionally, the end of the oblique section 120 is bent in a direction away from the axis of the rod body 100 and is provided with a retractor 130, so as to facilitate the nerves near the patient's bone to be moved aside, so that the work of inserting the Kirschner wire into the patient's bone can be carried out smoothly.

It should be noted that the Kirschner wire is a commonly used internal fixation material in orthopedics. It is used to fix fractures with little stress, such as short fractures or avulsion fractures, and is also used to fix temporary fracture fragments in orthopedic surgery. Its original specifications are generally fixed at about 20 cm, with different specifications between 0.5-2 mm in diameter. The commonly used Kirschner wire diameters range from 0.8 mm, 1.0 mm, 1.4 mm, etc. It is used to fix fractures with little stress, such as short fractures or avulsion fractures, and is also often used to fix temporary fracture fragments in orthopedic surgery. Due to its wide application, the maximum diameter of the Kirschner wire has gradually increased to 4 mm. With the development of external fixators, it is used in conjunction with external fixation screws to fix emergency larger fractures such as pelvic fractures and calcaneal fractures. The use of the Kirschner wire generally refers to: First, according to your method, a Kirschner wire can be used to fix the fracture in the anatomical position; then, holes are drilled perpendicular to the longitudinal axis of the phalanx at the proximal and distal ends of the fracture, 0.5-1 cm away from the fracture line, through the bilateral cortical bone. The two Kirschner wires with a diameter of 1.5 mm should be in one plane, and this plane should be parallel to the longitudinal axis of the phalanx; finally, take out the two Kirschner wires, insert the injection needle as a guide tube at the needle channel, pass the 1 mm steel wire through and tighten it to apply pressure - equivalent to the tension band steel wire. This fixation is very reliable, and early exercise can be performed after surgery to facilitate functional recovery. This method can also be used for phalanx fusion. Specifically, when using Kirschner wires to fix the fracture ends, a certain angle often needs to be set. In conventional treatment, the setting of different angles is often determined by the doctor's own experience and cannot be accurately positioned; and when the Kirschner wire is inserted into the patient's bone, it is difficult to add or fine-tune the position of the Kirschner wire near it. The nerve retractor 130 is often used in spinal surgery. It is a thin steel needle with a hook at the end, which is used to gently pull the surrounding nerves and tissues to protect them from damage during surgery. In spinal surgery, the nerve retractor 130 can help surgeons move nerves, blood vessels and other tissues, and then operate and adjust structures such as intervertebral discs and vertebral bodies. The nerve retractor 130 has different shapes and sizes to suit different surgical needs. The use of the nerve retractor 130 requires caution, as any negligence or overstretching of the nerve may lead to nerve damage and sequelae. Therefore, before using the nerve retractor 130, the surgeon needs to conduct a thorough surgical plan and determine the goals and risks of the surgery, and ensure careful operation during the operation to ensure the safety and effectiveness of the final surgical effect; the nerve retractor 130 is a surgical instrument used to uncover or pull the nerve or nerve root during surgery. In spinal surgery, the nerve retractor 130 is mainly used to dissect the spinal nerve roots or pull the nerve roots to obtain a better field of view, so as to better perform surgical treatment. It can help surgeons perform delicate nerve operations, protect nerve roots and surrounding tissues, and reduce the incidence of surgical complications. Therefore, the nerve retractor 130 is often used in conjunction with the Kirschner wire. The nerve retractor 130 is first used to pull or pull the nerve or nerve root where the Kirschner wire needs to be inserted. The doctor then confirms the insertion position of the Kirschner wire based on his or her own experience and performs the operation. During this process, multiple steps such as nerve traction, position determination, and needle insertion are required in sequence. Moreover, the needle insertion position depends entirely on the doctor's experience. The position of the Kirschner wire is not easy to adjust in the later stage, which is not conducive to improving surgical efficiency and surgical results. Therefore, in the present embodiment, on the one hand, by providing a guide hole 110 on the rod body 100 of the nerve retractor assembly, a guide function can be provided for the insertion of the Kirschner wire into the patient's bone while the nerve is being pulled away, thereby facilitating accurate positioning, improving the insertion efficiency of the Kirschner wire, and reducing the patient's pain during the operation; on the other hand, by providing two parallel guide holes 110 for inserting the Kirschner wire on the rod body 100 of the nerve retractor 130, when the position of the Kirschner wire needs to be fine-tuned after passing through one of the guide holes 110 and being driven into the patient's bone, it is only necessary to use the inserted Kirschner wire as a rotating shaft, rotate the rod body 100, deflect and adjust the other guide hole 110 to a suitable position, and then pass the second Kirschner wire through the other guide hole 110 and be driven into the patient's bone, thereby completing the insertion of the new Kirschner wire, with convenient operation and a stable and accurate adjustment process.

As shown in Figure 4, optionally, one of the two guide holes 110 is arranged close to the retractor 130, and the other guide hole 110 is arranged away from the retractor 130. Through this arrangement, during the use of this embodiment, the first Kirschner wire is generally inserted into the patient's bone through the guide hole 110 away from the retractor 130. When the insertion position of the Kirschner wire needs to be fine-tuned, it is only necessary to use the inserted Kirschner wire as a rotating shaft, rotate the rod body 100, deflect and adjust the other guide hole 110 to a suitable position, and then pass the second Kirschner wire through the other guide hole 110 and drive it into the patient's bone to complete the insertion of the new Kirschner wire. During this period, as the rod body 100 rotates, the retractor 130 will push away the nerves near the rod body 100 as it rotates, so that the second Kirschner wire will not cause damage to the nerves near the rod body 100 when it is inserted into the patient's bone through the guide hole 110 away from the retractor 130, thereby improving safety.

Optionally, the edges of the oblique section 120 and the hook 130 are both provided with a sharp edge 131 to prevent the rod body 100 of this embodiment from causing harm to the patient when penetrating into the patient's body, and to prevent medical staff from getting hurt when taking and using this embodiment, thereby improving the safety of use of this embodiment.

As shown in Figure 2, optionally, an angle a is formed between the oblique section 120 and the axis of the rod body 100, satisfying: 15°≤a≤25°; the angle a between the oblique section 120 and the axis of the rod body 100 can effectively ensure that the rod body 100 of this embodiment is more convenient and quick when penetrating into the patient's body close to the bone without causing damage to the patient's body. When the angle a is greater than 25°, it is easy to make it difficult for the rod body 100 of this embodiment to extend into the patient's body, prolonging the operation time. When the angle a is less than 15°, it is easy to make the end of the oblique section 120 of the rod body 100 of this embodiment too sharp, causing damage to the patient's body when it penetrates deep into the patient's body.

Of course, in other embodiments, the angle a between the oblique section 120 and the axis of the rod body 100 can also be 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, etc., which are not listed here one by one.

Optionally, a smooth layer 150 is formed on the side surface of the rod body 100 to facilitate smoothness when the rod body 100 is inserted into the patient's body and reduce the friction between the rod body 100 and the patient's body; specifically, the side surface of the rod body 100 can be formed with the smooth layer 150 by polishing, or by spraying a smooth paint to form the smooth layer 150, which will not be described in detail here.

As shown in FIG3 , optionally, a clamping portion 140 is provided on the peripheral side of the end of the rod body 100 away from the oblique section 120 , so as to facilitate medical personnel to hold the rod body 100 or instruments to clamp the rod body 100 , wherein the clamping portion 140 is not smoothed.

Optionally, the clamping portion 140 is provided with anti-slip grooves to increase the surface friction of the clamping portion 140 and improve the reliability of the cooperation between the clamping portion 140 and the hand or instrument of the medical staff.

Optionally, the rod body 100 is made of stainless steel or titanium alloy; specifically, the specific model of stainless steel selected for the rod body 100 is 316L, which has extremely strong corrosion resistance and wear resistance, and can greatly improve the safety of the rod body 100; the specific model of titanium alloy selected for the rod body 100 is TC4, and TC4 titanium alloy has medium room temperature and high temperature strength, good creep resistance and thermal stability, high fatigue performance and crack extension resistance in seawater, as well as excellent fracture toughness and hot salt stress corrosion performance.

Specifically, the nerve retractor assembly provided in this embodiment has a rod body 100 with a diameter of 8 mm, an oblique section 120 is provided at one end of the rod body 100, and the angle between the oblique section 120 and the axis of the rod body 100 is 22°; a retractor 130 is provided at the end of the oblique section 120, and the retractor 130 is deflected in a direction away from the axis of the rod body 100, and the thickness of the retractor 130 is 1.2-1.5 mm, the width connected to the oblique section 120 is 4.7 mm, the width at a position away from the oblique section 120 is 3.8 mm, and the deflection distance of the retractor 130 relative to the side of the rod body 100 is 2.3 mm; together with the retractor 130, the total length of the rod body 100 is 145 mm, and the other end of the rod body 100 away from the oblique section 120 is 145 mm. A clamping portion 140 is provided on the side surface, the length of the clamping portion 140 is 30 mm, and the surface of the clamping portion 140 is provided with straight lines of m=0.6 mm; two guide holes 110 parallel to the axis of the rod body 100 are provided on the end face of the rod body 100 for Kirschner wires to pass through, and the two guide holes 110 are through holes with a diameter of 1.2 mm, and the spacing between the axes of the two guide holes 110 is 5 mm, one of the guide holes 110 is arranged at a position close to the retractor 130, and the other guide rod is arranged at a position away from the retractor 130; the edges of the oblique section 120 and the retractor 130 are both provided with a sharp edge 131, with a rounded corner of R0.3-0.5 mm, and the end edge line of the rod body 100 away from the oblique section 120 has a rounded corner of R0.5 mm.

When the nerve retractor assembly provided in this embodiment is used during surgery, the bone that needs to be connected to the patient's fractured bone is first clamped and fixed with a bone rongeur, and then the nerve retractor assembly is inserted into the patient's body. During the penetration process, the retractor 130 can push aside the nerves on the surface of the bone, and finally align the guide hole 110 away from the retractor 130 with the position where the Kirschner wire needs to be inserted, and the rod body 100 is held or clamped stably. Then, the Kirschner wire is passed through the guide hole 110 away from the retractor 130 through an instrument and finally inserted into the patient's bone. During this period, the rod body 100 provides a guide for the insertion of the Kirschner wire into the patient's bone while pushing aside the nerve. The operation is convenient and the positioning is accurate, which can effectively improve the insertion of the Kirschner wire. The insertion of the new Kirschner wire can be completed by rotating the rod body 100 with the inserted Kirschner wire as the shaft, rotating the rod body 100, adjusting the other guide hole 110 to a suitable position, and then inserting the second Kirschner wire into the patient's bone through the other guide hole 110. During this period, as the rod body 100 rotates, the retractor 130 will push aside the nerves near the rod body 100 as it rotates, so that the second Kirschner wire will not cause damage to the nerves near the rod body 100 when it is inserted into the patient's bone through the guide hole 110 away from the retractor 130, thereby improving safety and making the entire adjustment process smooth and precise.

In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims (10)

1. A nerve retractor assembly for assisting in driving a Kirschner wire into a patient's bone, comprising: The rod body is provided with two guide holes, both of which are parallel to the axis of the rod body and are used to pass the Kirschner wire; one end of the rod body is provided with an oblique section. 2. The nerve hook assembly according to claim 1, characterized in that the distance between the edges of the two guide holes is not less than 4 mm. 3 . The nerve retractor assembly according to claim 1 , wherein the end of the oblique section is bent in a direction away from the axis of the rod body to form a retractor. 4 . The nerve hook assembly according to claim 3 , wherein one of the two guide holes is disposed close to the hook, and the other guide hole is disposed away from the hook. 5. The nerve retractor assembly according to claim 3, characterized in that the oblique section and the edge of the retractor are both provided with a deburred edge. 6 . The nerve retractor assembly according to claim 1 , wherein an angle a is formed between the oblique section and the axis of the rod body, satisfying: 15°≤a≤25°. 7. The nerve retractor assembly according to any one of claims 1 to 6, characterized in that a smooth layer is formed on the side surface of the rod. 8 . The nerve retractor assembly according to claim 7 , wherein a clamping portion is provided on a peripheral side of the end of the rod body away from the oblique cross section. 9 . The nerve retractor assembly according to claim 8 , wherein the clamping portion is provided with anti-slip grooves. 10 . The nerve retractor assembly according to claim 1 , wherein the rod body is made of stainless steel or titanium alloy.