A finger joint k-wire fixation assisted inserter and method of use

Abstract

The application relates to the technical field of medical devices, and particularly discloses a finger joint Kirschner wire fixing auxiliary placement device and a use method. The finger joint Kirschner wire fixing auxiliary placement device comprises a bottom surface, a first side surface fixedly connected to the top of the bottom surface, a second side surface slidingly connected to the top of the bottom surface, wherein the second side surface is arranged opposite to the first side surface, the sliding direction of the second side surface is towards or away from the first side surface, an adjusting mechanism for adjusting the distance between the first side surface and the second side surface is installed on the first side surface, and an end surface is further fixedly connected to the end of the first side surface. The fixing box body composed of the bottom surface, the first side surface, the second side surface and the end surface and the adjusting mechanism realize mechanical fixation of fingers, replace traditional manual fixation, improve fixation stability, ensure needle placement accuracy, and solve the problems that needle placement points and directions cannot be determined in the prior art and needle placement success rate is low.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a Kirschner wire fixation auxiliary implantation device for finger joints and its usage method. Background Technology

[0002] In patients with hand injuries, due to conditions such as joint dislocation, joint instability, or tendon injury, Kirschner wire traction fixation is required for the distal interphalangeal joint (DIP) and proximal interphalangeal joint (PIP) of the fingers.

[0003] Current treatment methods or techniques involve a surgeon and an assistant performing the procedure together. The assistant manually fixes the finger joint in a specific position, and then the surgeon blindly inserts a Kirschner wire. Because the surgeon's insertion point and direction are uncertain, the success rate is low, sometimes requiring repeated insertions, which can easily damage surrounding blood vessels, nerves, and other tissues. Currently, there are no specialized auxiliary tools for inserting joint traction wires.

[0004] Current treatment methods rely entirely on the surgeon's experience to blindly insert traction pins into the joint without any auxiliary tools. The placement point and direction of the pins cannot be determined, and the success rate is low. The success rate varies greatly among different surgeons, and the success rate is directly proportional to the surgeon's experience. Furthermore, due to the poor fixation effect, repeated insertions can easily damage surrounding blood vessels, nerves, and other tissues. Summary of the Invention

[0005] The purpose of this invention is to provide a Kirschner wire fixation auxiliary implanter for finger joints and its usage method, so as to solve the technical problems mentioned in the background art, such as the inability to determine the needle placement point and direction, low needle placement success rate, and easy damage to surrounding tissues.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a Kirschner wire fixation auxiliary inserter for finger joints, comprising a bottom surface, a first side surface fixedly connected to the top of the bottom surface, a second side surface detachably connected to the top of the bottom surface, the second side surface being disposed opposite to the first side surface, the sliding direction of the second side surface being toward or away from the first side surface, an adjustment mechanism for adjusting the distance between the first side surface and the second side surface being installed on the first side surface, and an end face fixedly connected to the end of the first side surface, the end face being located between the first side surface and the second side surface, and multiple Kirschner wire insertion holes being provided on the first side surface, the second side surface and the end face.

[0007] The first side is vertically disposed on the bottom surface, and the second side is disposed parallel to the first side.

[0008] The adjustment mechanism includes an adjustment bolt mounted on a first side, and an adjustment nut threadedly connected to the adjustment bolt through a second side.

[0009] A top surface is provided above the bottom surface. One side of the top surface is fixedly connected to the first side surface, and the other side of the top surface is abutted and fixed to the second side surface.

[0010] The diameter of the needle inlet is the same as that of the Kirschner wire, and the axis of the needle inlet forms an inclination angle with the horizontal line of the bottom surface.

[0011] The tilt angle range is 0°-10°.

[0012] The end face is located between the first side and the second side, and the length of the end face is not greater than the minimum distance between the first side and the second side.

[0013] Compared with the prior art, the beneficial effects of the present invention are: This invention achieves mechanical fixation of the finger through a fixed housing composed of a bottom surface, a first side surface, a second side surface, and an end surface, along with an adjustment mechanism. This replaces traditional manual fixation, improves fixation stability, and ensures needle placement accuracy. By pre-setting a matrix arrangement of Kirschner wire insertion holes on the insertion surface and end surface, the insertion point and direction are defined, avoiding blind insertion and significantly improving the success rate of needle placement. This reduces the risk of damage to surrounding blood vessels and nerves from repeated needle insertions and decreases reliance on the operator's experience. The sliding adjustment of the second side surface is achieved through a groove and slider structure. Combined with the spacing adjustment function of the adjustment mechanism, it can adapt to the fixation needs of fingers of different thicknesses, achieving personalized adaptation. By setting insertion holes with the same diameter as the Kirschner wires and pre-setting an inclination angle, the accuracy and stability of the needle insertion direction are further ensured, reducing the number of repeated needle insertions and effectively avoiding damage to surrounding blood vessels, nerves, and other important tissues.

[0014] A method for using a Kirschner wire fixation auxiliary implant for finger joints includes the following steps: S1: Insert the injured finger into the finger insertion channel between the first and second sides, with the back of the finger facing up and laid flat on the bottom surface; S2: Medical staff apply downward force against the fingers while tightening the spacing adjustment mechanism on the first and second sides to keep the patient's fingers stable and not move. S3: Medical staff select the needle insertion point according to the type of joint that needs to be fixed, select a Kirschner wire of a certain length according to the selected needle insertion point, and insert the needle according to the pre-designed angle of the needle insertion point; S4: After the needle insertion operation is completed, loosen the adjustment mechanism of the distance between the first and second sides, remove the second side, and separate the finger from the auxiliary inserter.

[0015] The length of the selected Kirschner wire should be such that, after the insertion operation is completed, the length of the Kirschner wire protruding from the finger is no more than 2 cm, so as to facilitate the separation of the finger from the auxiliary inserter.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This invention achieves precise positioning of the needle placement point and direction through pre-set angled and positioned needle insertion holes, avoiding the uncertainty of traditional blind insertion; improves surgical success rate: mechanical fixation replaces manual fixation, resulting in better finger stability and significantly improved needle placement success rate, reducing reliance on surgeon experience; reduces tissue damage: precise needle placement positioning reduces the number of repeated needle insertions, effectively avoiding damage to surrounding blood vessels, nerves, and other important tissues; personalized adaptation: through an adjustable second side and a matrix arrangement of needle insertion holes, it can meet the needle placement needs of different fingers (thumb, index finger, middle finger, ring finger, little finger) and different joints (DIP, PIP, MP); simple operation: simple structure, easy to use, easy to disinfect and reuse, suitable for clinical application. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the auxiliary implant according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the second side structure of the auxiliary implant according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the bottom structure of the auxiliary implant according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the silicone pad structure according to an embodiment of the present invention.

[0018] In the diagram: 1. First side surface; 2. Second side surface; 3. Bottom surface; 4. End face; 5. Needle inlet; 6. Adjusting bolt; 7. Threaded hole; 8. Slide groove; 9. Slider; 10. Silicone gasket; 11. Top surface; 12. Bolt groove. Detailed Implementation

[0019] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0020] The following description, in conjunction with the accompanying drawings, describes an embodiment of a Kirschner wire fixation auxiliary implant for a finger joint according to the present invention.

[0021] Example 1 like Figures 1 to 4As shown, a Kirschner wire fixation auxiliary inserter for finger joints according to an embodiment of the present invention includes a bottom surface 3. A first side surface 1 is fixedly connected to the top of the bottom surface 3, and a second side surface 2 is detachably connected to the top of the bottom surface 3. The second side surface 2 is disposed opposite to the first side surface 1, and the sliding direction of the second side surface 2 is towards or away from the first side surface 1. Specifically, the first side surface 1 is vertically disposed on the bottom surface 3, and the second side surface 2 is parallel to the first side surface 1. A sliding groove 8 is formed on the bottom surface 3, and a slider 9 is fixedly connected to the bottom of the second side surface 2. The slider 9 is slidably connected within the sliding groove 8. An adjustment mechanism for adjusting the distance between the first side surface 1 and the second side surface 2 is installed on the first side surface 1. Specifically, the adjustment mechanism includes four adjusting bolts 6 installed on the first side surface 1, and the adjusting bolts 6 are threaded through the second side surface 2 and threaded with adjusting nuts. Specifically, a threaded hole 7 is formed on the second side surface 2. A bolt groove 12 is formed on the bottom surface 3, and the two adjusting bolts 6 at the lower part of the first side surface 1 are embedded in the bolt groove 12 to avoid the two adjusting bolts 6 at the lower part of the first side surface 1 from affecting the finger placement. In use, the distance between the first side 1 and the second side 2 is adjusted by turning the adjusting bolt 6 and the adjusting nut clockwise or counterclockwise, thereby achieving finger positioning and fixation. The sliding connection of the second side 2 and the adjusting mechanism achieve mechanical fixation of the finger, replacing traditional manual fixation methods, improving fixation stability, and ensuring needle placement accuracy.

[0022] An end face 4 is fixedly connected to the end of the first side surface 1. The end face 4 is located between the first side surface 1 and the second side surface 2, and the length of the end face 4 is not greater than the minimum distance between the first side surface 1 and the second side surface 2. Multiple Kirschner wire insertion holes 5 are provided on the first side surface 1, the second side surface 2, and the end face 4. The Kirschner wire insertion holes 5 are arranged in a matrix on the first side surface 1, the second side surface 2, and the end face 4. Specifically, ... Figure 1 Taking the central direction as an example, the end face 4 has 6 Kirschner wire insertion holes 5 in the center, with equal spacing in the vertical and horizontal directions. Fingers can enter through the finger insertion channel between the first side 1 and the second side 2, with the back of the finger extended and flat on the bottom surface 3. Both the first side 1 and the second side 2 have 20 insertion holes 5 arranged in a matrix of 10 columns and 2 rows to meet the insertion needs of different fingers and distal interphalangeal joints, proximal interphalangeal joints, and metacarpophalangeal joints.

[0023] The diameter of the needle insertion hole 5 is the same as that of the Kirschner wire, and the axis of the needle insertion hole 5 forms an inclination angle with the horizontal line of the bottom surface 3. The inclination angle ranges from 0° to 10°. Specifically, in this embodiment, the diameter of the needle insertion hole 5 is 1 mm, and the inclination angle is 10°. By pre-arranging the Kirschner wire needle insertion holes 5 in a matrix on the first side surface 1, the second side surface 2, and the end surface 4, the needle insertion point and direction are defined, avoiding blind insertion, significantly improving the success rate of needle placement, reducing the risk of damage to surrounding blood vessels and nerves from repeated needle insertions, and reducing reliance on the surgeon's experience. By setting the needle insertion hole 5 with the same diameter as the Kirschner wire and pre-setting the inclination angle, the accuracy and stability of the needle insertion direction are further ensured, reducing the number of repeated needle insertions and effectively avoiding damage to surrounding blood vessels, nerves, and other important tissues.

[0024] Example 2 The difference between this embodiment and Embodiment 1 lies only in that a top surface 11 is provided above the bottom surface 3. One side of the top surface 11 is fixedly connected to the first side surface 1, and the other side of the top surface 11 is tightly fixed to the second side surface 2. A silicone pad 10 is also provided on the bottom surface 3 to support the finger. In use, the silicone pad 10 is fixed to the bottom surface 3, located on the palmar side of the finger joint, to maintain the joint in a slightly flexed position. The silicone pad 10 provides auxiliary support for the finger during fixation, reducing patient discomfort.

[0025] Example 3 A method for using a Kirschner wire fixation auxiliary implant for finger joints includes the following steps: S1: Insert the injured finger of the patient into the finger insertion channel between the first side 1 and the second side 2, with the back of the finger facing up and placed flat on the bottom surface 3; S2: Medical staff apply downward force to resist the fingers, while tightening the spacing adjustment mechanism on the first side 1 and the second side 2 to keep the patient's fingers stable and not move. S3: Medical staff select the needle insertion hole 5 position according to the type of joint that needs to be fixed, select a Kirschner wire of a certain length according to the selected needle insertion hole 5 position, and insert the needle according to the pre-designed angle of the needle insertion hole 5. S4: After the needle insertion operation is completed, loosen the adjustment mechanism of the distance between the first side 1 and the second side 2, remove the second side 2, and separate the finger from the auxiliary inserter.

[0026] Example 4 The difference between this embodiment and Embodiment 3 is that it also includes the following steps: the length of the Kirschner wire used is such that, after the insertion operation is completed, the length of the Kirschner wire protruding from the finger is no more than 2 cm, so as to facilitate the separation of the finger from the auxiliary implant. Before inserting the patient's injured finger into the finger insertion channel of the auxiliary implant, a silicone pad 10 is installed on the bottom surface 3. After the patient's injured finger is inserted into the finger insertion port of the auxiliary implant, the silicone pad 10 is placed on the palmar side of the finger joint to maintain the joint in a slightly flexed position.

[0027] Specifically, let's take middle finger surgery as an example. Before the operation, medical staff prepare a suitable fixation device according to the patient's finger condition and place a silicone pad 10 on the bottom surface 3. Insert the patient's injured middle finger into the finger insertion channel of the device, with the back of the finger facing upward and placed flat on the bottom surface 3. Adjust the position so that the PIP joint is above the silicone pad 10. Place the silicone pad 10 on the palmar side of the middle finger's PIP joint, maintaining the joint in a slightly flexed position (about 20-30°). The assistant applies downward force against the middle finger while simultaneously tightening the adjusting nut 7 on the second side surface 2 clockwise to stabilize the middle finger. Select the needle insertion hole 5 according to the type of joint to be fixed, and insert a Kirschner wire with a diameter of 1.0 mm and a length of 2-3 cm into the selected needle insertion hole 5 at a pre-designed angle of 30°. Insert the second Kirschner wire in the same way to form a cross fixation or parallel fixation. After the operation is completed, loosen the adjusting bolt 6 counterclockwise, remove the second side surface 2, and separate the patient's middle finger from the device.

[0028] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

Claims

1. A Kirschner wire fixation auxiliary insertion device for finger joints, characterized in that, Includes a bottom surface (3), a first side surface (1) is fixedly connected to the top of the bottom surface (3), a second side surface (2) is detachably connected to the top of the bottom surface (3), the second side surface (2) is arranged opposite to the first side surface (1), the sliding direction of the second side surface (2) is towards or away from the first side surface (1), an adjustment mechanism for adjusting the distance between the first side surface (1) and the second side surface (2) is installed on the first side surface (1), an end face (4) is fixedly connected to the end of the first side surface (1), and multiple Kirschner wire insertion holes (5) are opened on the first side surface (1), the second side surface (2) and the end face (4).

2. The finger joint Kirschner wire fixation auxiliary implantation device according to claim 1, characterized in that: The first side (1) is vertically disposed on the bottom surface (3), and the second side (2) is disposed parallel to the first side (1).

3. The Kirschner wire fixation auxiliary implant for finger joints according to claim 2, characterized in that: The adjustment mechanism includes an adjustment bolt (6) mounted on the first side (1), and the adjustment bolt (6) is threaded through the second side (2) and connected to an adjustment nut.

4. The finger joint Kirschner wire fixation auxiliary implantation device according to claim 3, characterized in that: A groove (8) is provided on the bottom surface (3), and a slider (9) is fixedly connected to the bottom of the second side surface (2). The slider (9) is slidably connected in the groove (8).

5. The finger joint Kirschner wire fixation auxiliary implantation device according to claim 4, characterized in that: A top surface (11) is provided above the bottom surface (3). One side of the top surface (11) is fixedly connected to the first side surface (1), and the other side of the top surface (11) is abutted and fixed to the second side surface (2).

6. The finger joint Kirschner wire fixation auxiliary implantation device according to claim 1, characterized in that: The diameter of the needle inlet (5) is the same as that of the Kirschner wire, and the axis of the needle inlet (5) forms an inclination angle with the horizontal line of the bottom surface (3).

7. The Kirschner wire fixation auxiliary implant for finger joints according to claim 6, characterized in that: The tilt angle range is 0°-10°.

8. The Kirschner wire fixation auxiliary implant for finger joints according to claim 1, characterized in that: The end face (4) is located between the first side face (1) and the second side face (2), and the length of the end face (4) is not greater than the minimum spacing between the first side face (1) and the second side face (2).

9. A method of using a Kirschner wire fixation auxiliary implanter for finger joints, comprising the Kirschner wire fixation auxiliary implanter for finger joints according to any one of claims 1-8, characterized in that: Includes the following steps: S1: Insert the injured finger of the patient into the finger insertion channel between the first side (1) and the second side (2), with the back of the finger facing up and laid flat on the bottom surface (3); S2: Medical staff apply downward force against the fingers, while tightening the spacing adjustment mechanism on the first side (1) and the second side (2) to keep the patient's fingers stable and not move. S3: Medical staff select the position of the needle insertion hole (5) according to the type of joint that needs to be fixed, select a Kirschner wire of a certain length according to the selected needle insertion hole (5) position, and insert the needle according to the pre-designed angle of the needle insertion hole (5); S4: After the needle insertion operation is completed, loosen the adjustment mechanism of the distance between the first side (1) and the second side (2), remove the second side (2), and separate the finger from the auxiliary inserter.

10. The method of using the Kirschner wire fixation auxiliary implant for finger joints according to claim 9, characterized in that: The length of the selected Kirschner wire should be such that, after the insertion operation is completed, the length of the Kirschner wire protruding from the finger is no more than 2 cm, so as to facilitate the separation of the finger from the auxiliary inserter.

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