Sled needle plate and intraoperative bending tool

Abstract

The invention provides a sled needle plate and an intraoperative bending tool, the sled needle plate comprises a pair of needle bodies, the tail end of each needle body is used for being fixed to a skeleton through a screw, a needle tip is formed at the head end of each needle body, the pair of needle bodies sequentially form a connecting section, an extending section and an implanting section from the tail end to the head end, the needle bodies are connected with the screws through the connecting sections, and the extending sections are connected with the screws through the implanting sections. The connecting section of at least one needle body is arranged around the screw so as to be suitable for driving the corresponding needle body to integrally rotate around the screw in the center. According to the sled needle plate, the connecting section of at least one needle body is arranged to surround the screw, so that the connecting section can drive the whole needle body to rotate around the center of the screw only by applying a relatively light external force in an operation, the angle of the needle body can be accurately and quickly adjusted in the operation, and meanwhile, the service life of the sled needle plate is prevented from being influenced.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to a sled needle plate and an intraoperative bending tool. Background Art

[0002] In orthopedic repair surgeries, for fractures involving a large number of bone fragments or with prominent bony contours between fragments, such as in the repair of olecranon fractures, Kirschner screws and tension wires are typically used for fixation. However, this can lead to loosening of the tension wires during postoperative recovery. Existing techniques have developed sled pin plates, which have one end secured to one bone fragment with a screw and the other end secured to one or more other fragments with a pin, thus replacing both Kirschner screws and tension wires.

[0003] In order to adapt to the protruding bone surface contour and the position between the bone blocks, the angle between the needle body needs to be bent and adjusted. The sled needle plate of the existing technology is made of stainless steel, which has strong bending resilience and limited operating space during surgery. Therefore, the needle body can only be bent before the operation. The deviation between the bending angle and the actual required adjustment angle makes repeated bending inevitable, which increases the operation time, affects the service life of the needle body, and the operation process is cumbersome. Summary of the Invention

[0004] The invention provides a sled needle plate and an intraoperative bending tool.

[0005] Specifically, the present invention is achieved through the following technical solutions: In a first aspect, an embodiment of the present invention provides a sled needle plate for fixing bones, wherein the sled needle plate includes a pair of needle bodies, the tail end of each needle body is used to fix to the bone through a screw, and the head end of each needle body is formed with a needle tip. The pair of needle bodies are sequentially formed into a connecting section, an extension section and an implantation section from the tail end to the head end. The needle body is connected to the screw through the connecting section, and the connecting section of at least one needle body is arranged around the screw so as to be able to drive the corresponding needle body as a whole to rotate around the screw.

[0006] In some embodiments, a plate body is further included, the plate body is formed with a through hole extending toward the bone, the through hole is used for the screw to pass through, and an arc-shaped groove surrounding the screw is formed at the bottom of the plate body. The connecting sections of a pair of needle bodies are separately arranged, and the connecting section of each needle body is arranged at the bottom of the plate body. The connecting section of at least one needle body is formed into an arc that matches the shape of the groove, so that the connecting section can be embedded in the groove and can be guided and moved along the groove track in the groove, thereby driving the corresponding needle body as a whole to rotate around the screw.

[0007] In some embodiments, the grooves are configured as two arranged along the direction of the extension section, and the connecting sections of a pair of needle bodies are formed as arcs matching the shape of the grooves. The connecting section of one needle body is embedded in one groove and the extension section is led out from one side of the plate body, and the connecting section of the other needle body is embedded in another groove and the extension section is led out from the other side of the plate body.

[0008] In some embodiments, the connecting sections of the pair of needle bodies are integrally formed into a spiral shape, and the spiral center hole of the spiral extends toward the bone, and the spiral center hole is used for passing the screw.

[0009] In some embodiments, the helical formation is a 540 degree helix.

[0010] In the second aspect, an embodiment of the present invention provides an intraoperative bending tool for performing intraoperative bending on the sled needle plate as described in the first aspect, wherein the intraoperative bending tool includes a pair of tool bodies pivotally connected to each other, a pair of rotating modules symmetrically arranged at the head end of one tool body, and a fixed module arranged at the head end of the other tool body, the fixed module being located between the pair of rotating modules, the fixed module being provided with a fixed column, and each rotating module being provided with a rotatable turntable, and at least two adjustment columns of different diameters being arranged on the turntable around the rotation center line of the turntable.

[0011] In some embodiments, a mounting seat is provided at the head end of the tool body, a first accommodating cavity for setting a turntable is formed on both sides of the mounting seat, a second accommodating cavity is formed in the middle of the mounting seat, the fixing module is provided with a fixing seat, and a fixing column is provided on the fixing seat. The shape of the fixing seat matches that of the second accommodating cavity, so that when a pair of tool bodies are in the starting state of bending, the fixing seat can be embedded in the second accommodating cavity.

[0012] In some embodiments, each tool body is provided with a handle and a pivot seat, the pivot seat of the tool body corresponding to the rotating module is a double-plate structure, and the pivot seat of the tool body corresponding to the fixed module is a single-plate structure, and the single-plate structure is arranged between the double-plate structure.

[0013] In some embodiments, the pivot axis passes through both the single-plate structure and the double-plate structure.

[0014] In some embodiments, the rotating module is arranged in the lower area of the double-board structure head end, the upper area of the double-board structure head end is an open structure, and the fixed module is arranged in the upper area of the single-board structure head end, and the lower area of the single-board structure head end is a retracted structure.

[0015] According to an embodiment of the first aspect of the present invention, by configuring the connecting section of at least one needle body to surround the screw, only a relatively light external force is applied during surgery, and the connecting section can drive the entire needle body to rotate around the center of the screw, thereby enabling accurate and rapid adjustment of the needle body angle during surgery while avoiding affecting the service life of the sled needle plate. According to an embodiment of the second aspect of the present invention, by respectively configuring a fixing module and a rotating module at the head end of a pair of tool bodies of a bending tool during surgery, it is only necessary to rotate the turntable to select and replace an adjustment column with a suitable diameter to participate in the bending operation. The needle body of the embodiment of the first aspect of the present invention is wrapped around the fixing column and passed through the gap between the fixing column and the adjustment column. The pair of tool bodies are operated to pivot so that their head ends are separated from each other, thereby enabling accurate and rapid bending of the needle body during surgery.

[0016] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0018] Figure 1 is a schematic diagram of the assembled state of a sled needle plate in one embodiment of the present invention from a first perspective; Figure 2 is a schematic diagram of the assembled state of the sled needle plate in one embodiment of the present invention from a second perspective; Figure 3 is a schematic diagram of a disassembled state of a sled needle plate in one embodiment of the present invention from a second viewing angle; Figure 4 is a schematic diagram of a first perspective view of a sled needle plate in another embodiment of the present invention; Figure 5 is a schematic diagram of a second perspective of a sled needle plate in another embodiment of the present invention; Figure 6 is a schematic diagram of a first perspective of an intraoperative bending tool in one embodiment of the present invention; Figure 7 yes Figure 6 A partial enlarged view of point A in the middle; Figure 8 is a schematic diagram of a second viewing angle of an intraoperative bending tool in one embodiment of the present invention; Figure 9 It is a front view of an intraoperative bending tool in one embodiment of the present invention.

[0019] Reference numerals: 01: screw; 02: washer; 10: needle body; 11: connecting section; 12: extension section; 13: implantation section; 20: plate body; 21: first groove; 22: second groove; 23: through hole; 31: Handle; 32: First pivot seat; 321: Double-plate structure; 33: Second pivot seat; 331: Single-plate structure; 332: Fixed seat; 34: Pivot shaft; 35: Mounting seat; 351: First accommodating cavity; 352: Second accommodating cavity; 36: Turntable; 37: Fixed column; 38: Adjustment column. DETAILED DESCRIPTION

[0020] The present invention will now be discussed with reference to several embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present invention, rather than implying any limitation on the scope of the present invention.

[0021] As used herein, the term "including" and its variations are to be interpreted as open-ended terms meaning "including but not limited to," the terms "embodiment" and "one embodiment" are to be interpreted as "at least one embodiment," and the term "another embodiment" is to be interpreted as "at least one other embodiment." The terms "first," "second," and the like may refer to different or identical objects. The term "configured" is not limited to direct or indirect connections, nor is it limited to a specific method of connection. Other explicit and implicit definitions may be included below.

[0022] In the following description, some specific numerical values or numerical ranges may be involved. It should be understood that these numerical values and numerical ranges are merely exemplary, and they may be helpful in putting the idea of the present invention into practice. However, the description of these examples is not intended to limit the scope of the present invention in any way. According to specific application scenarios and requirements, these numerical values or numerical ranges can be set separately.

[0023] As mentioned above, the existing sled needle plate cannot be bent and adjusted during surgery, which increases the operation time, affects the service life of the needle body, and the operation process is cumbersome. The sled needle plate and intraoperative bending tool proposed in the embodiment of the present invention can at least solve some of the above problems. Figures 1 to 9 The structure and working principle of the sled needle plate and the intraoperative bending tool according to the exemplary embodiment of the present invention are described below. Figure 1-Figure 3 As shown, a sled needle plate according to an embodiment of the present invention generally comprises a needle body and a plate body 20. The needle bodies are a pair, and each of the pair of needle bodies is connected to the plate body 20. The plate body 20 is fixed to one bone block using a screw 01, and the needle tips at the front ends of the pair of needle bodies are used to fix the pair of needle bodies to another bone block or to two other bone blocks respectively. The elastic restoring force generated by the needle bodies is used to press the fractured bone blocks together.

[0024] Each of the pair of needle bodies has a head end and a tail end. The position where the needle tip is located is defined as the head end of the needle body, and the other end opposite to the needle tip is defined as the tail end of the needle body. Each needle body is formed with three sections with different functions, namely a connecting section 11, an extension section 12, and an implantation section 13. The three sections are arranged end to end in sequence from the tail end to the head end. Among them, the connecting section 11 is used to connect the needle body to the plate body 20, the implantation section 13 is used to extend into the pre-drilled hole of the bone block to fix the needle body to the bone block, and the extension section 12 is used to adjust the distance and position between the connecting section 11 and the implantation section 13. Exemplarily, the outer periphery of the implantation section 13 is formed with an external thread. The implantation section 13 can also be set as a split type. First, the implantation section 13 in the needle tip area is screwed into the pre-drilled hole using the external thread, and then the implantation section 13 portion adjacent to the extension section 12 is plugged into the external thread portion.

[0025] It should be noted that the boundaries between the connecting section 11, the extension section 12 and the implantation section 13 in the embodiment of the present invention do not need to be strictly defined. Those skilled in the art will understand that any needle section that can achieve the corresponding function will suffice. Figure 1-Figure 3 As shown, the extension section 12 and the implant section 13 form a bending angle at the adjacent region.

[0026] When using a sled needle plate, the distance between the needle tips of a pair of needle bodies needs to be adjusted. To do this, one or both needle bodies need to be bent horizontally during the operation. The horizontal direction is defined as Figure 1 The surface direction of the middle plate 20. Figure 2 and Figure 3 As shown, in an embodiment of the present invention, a first groove 21 and a second groove 22 are formed at the bottom of the plate body 20 , and the positions between the first groove 21 and the second groove 22 are arranged along the direction of the extension section 12 , wherein the second groove 22 is located closer to the extension section 12 .

[0027] The first groove 21 and the second groove 22 both have arc-shaped trajectories, and the connecting segments 11 of the pair of needle bodies also have arc-shaped trajectories that match the trajectories of the first groove 21 and the second groove 22, respectively. This arrangement allows the connecting segments 11 of the needle bodies to be embedded in the grooves and to be freely guided and moved within the grooves without deformation (without having to overcome deformation rebound forces). The connecting segment 11 of one needle body is embedded in one groove and extends from one side of the plate body 20 to the extending segment 12, while the connecting segment 11 of the other needle body is embedded in the other groove and extends from the other side of the plate body 20 to the extending segment 12. Therefore, by applying only a small external force, the entire needle body can be rotated about the center of the arc, which is equivalent to adjusting the angle of the needle body without bending the needle body, thereby adjusting the distance between the needle tips of the pair of needle bodies.

[0028] For example, only one groove may be provided at the bottom of the plate 20 , and one needle body is embedded in the groove by means of the arc-shaped connecting section 11 and can be freely guided and moved to adjust the angle, while the other needle body only needs to be fixedly connected to the bottom of the plate 20 by means of the connecting section 11 .

[0029] The plate 20 is also provided with a through hole 23 for inserting the screw 01. Figure 2 and Figure 3 As shown, the arc centers of the first groove 21 and the second groove 22 coincide with the centers of the two through holes 23 respectively, thereby ensuring that the connecting section 11 rotates around the center of the screw 01 passing through the through hole 23, that is, the needle body 10 as a whole rotates around the center of the screw 01.

[0030] like Figure 4 and Figure 5 As shown, the sled needle plate of another embodiment of the present invention does not need to be provided with a plate body 20, and the number of needle bodies is also set to a pair. The difference is that the connecting section 11 of the pair of needle bodies is formed as one body, and the connecting section 11 is formed into a spiral shape, and the spiral center hole of the spiral extends toward the bone, and the spiral center hole is used for the screw 01 to pass through. With such a configuration, since the spiral shape can absorb the deformation caused by the bending of the needle body, after the screw 01 is driven into the bone, the screw 01 fixes the connecting section 11 to the bone through the washer 02 and ensures that the spiral part does not rotate. At this time, only a small external force is applied to the needle body 10, and the spiral diameter of the connecting section can be increased and decreased without bending the extension section 12, thereby changing the angle between the extension sections 12 of the pair of needle bodies 10 and adjusting the distance between the needle tips of the pair of needle bodies 10. For example, as Figure 4 and Figure 5 As shown, the spiral is formed into a 540-degree spiral, that is, the arc of the connecting section 11 surrounds the screw 01 one and a half turns.

[0031] like Figure 6-Figure 9 As shown, in order to achieve intraoperative bending, the intraoperative bending tool of an embodiment of the present invention generally includes a pair of tool bodies pivotally connected to each other, each tool body is provided with a handle 31, and the front ends of the handles 31 of the pair of tool bodies are respectively provided with a first pivot seat 32 and a second pivot seat 33, which are connected to each other through a pivot shaft 34 at the first pivot seat 32 and the second pivot seat 33.

[0032] The first pivot seat 32 is formed with a double-plate structure 321, and the second pivot seat 33 is formed with a single-plate structure 331. The thickness of the single-plate structure 331 matches the gap size of the double-plate structure 321. When a pair of tool bodies are in the starting state of bending, the distance between the pair of handles 31 is at the minimum state. At this time, the single-plate structure 331 can be embedded in the double-plate structure 321, so that the first pivot seat 32 and the second pivot seat 33 are mutually limited along the direction of the pivot axis 34, thereby ensuring the symmetry of the bending deformation of the needle body 10.

[0033] A mounting seat 35 is provided at the head end of the first pivot seat 32. The mounting seat 35 forms a pair of symmetrical first accommodating cavities 351 at positions corresponding to the double-plate structure 321 of the first pivot seat 32, thereby enabling the double-plate structure 321 to support the bending load borne by the rotation module at the first accommodating cavity 351. The rotation module is composed of a turntable 36 and an adjustment column 38. The inner contour of the first accommodating cavity 351 is cylindrical. A turntable 36 with a matching outer contour is provided within the first accommodating cavity 351. The turntable 36 can rotate freely within the first accommodating cavity 351. Multiple adjustment columns 38 are distributed on the edge area of the end surface of the turntable 36. Each adjustment column 38 has a different diameter. By rotating the turntable 36, one of the adjustment columns 38 is brought closer to the fixed column 37, thereby determining the angle of the needle body 10 that can be bent. For example, the number of adjustment columns 38 provided on the end surface of each turntable 36 is three.

[0034] The lower region of the head end of the double-plate structure 321 of the first pivot seat 32 forms a closed structure, while the lower region of the head end of the single-plate structure 331 of the second pivot seat 33 is a retracted structure, causing the head end of the single-plate structure 331 to abut against the closed structure, thereby providing mutual position limiting in the direction of the line connecting the tail end and the head end between the first pivot seat 32 and the second pivot seat 33. The upper region of the head end of the double-plate structure 321 of the first pivot seat 32 is an open structure, while the upper region of the head end of the single-plate structure 331 of the second pivot seat 33 extends to form a fixed seat 332, allowing the fixed column 37 provided on the fixed seat 332 to extend between the pair of turntables 36, thereby cooperating with the adjustment columns 38 on both sides to achieve intraoperative bending.

[0035] Among them, the mounting seat 35 forms a second accommodating cavity 352 in the middle area between a pair of first accommodating cavities 351. The internal contour shape of the second accommodating cavity 352 matches the outer contour of the protruding structure in the upper area of the head end of the single-plate structure 331 of the second pivot seat 33. When a pair of tool bodies are in the starting state of bending, the protruding structure can be embedded in the second accommodating cavity 352, thereby providing mutual limitation along the direction of the pivot axis 34 between the first pivot seat 32 and the second pivot seat 33, which is used to ensure the bending angle accuracy of the needle body 10.

[0036] When using the intraoperative bending tool of the embodiment of the present invention, the extension section 12 of the needle body 10 and the adjacent area of the implantation section 13 are sleeved over the fixing column 37, and the extension section 12 and the implantation section 13 respectively pass downward from the gap between a pair of adjustment columns 38 and the fixing column 37, and the handle 31 is used to operate the fixing column 37 and the adjustment column 38 to move up and down respectively, so that the angle bending between the extension section 12 and the implantation section 13 can be easily completed during the operation; the spiral center hole of the spiral connecting section 11 of the needle body 10 of the embodiment of the present invention is sleeved on the fixing column 37, and a The extension section 12 of the needle body 10 passes downward through the gap between a pair of adjustment columns 38 and the fixed column 37, and the handle 31 is used to operate the fixed column 37 and the adjustment column 38 to move up and down respectively, so that the angle bending between the two implantation sections 13 can be conveniently completed during the operation; in the above-mentioned use process, before or after the needle body 10 is placed in the gap between the pair of adjustment columns 38 and the fixed column 37, the adjustment column 38 of appropriate diameter can be moved to a position close to the fixed column 37 by rotating the turntable 36, so as to realize flexible adjustment of any bending angle during the operation.

[0037] For example, the sled needle plate of the embodiment of the present invention can be made of a degradable magnesium alloy material, eliminating the need for a secondary surgery to remove the sled needle plate, thereby avoiding secondary injury to the patient and simplifying the treatment process.

[0038] The description of the embodiments herein and any references to directions and orientations are for ease of description only and are not to be construed as limiting the scope of the present invention. The description of the preferred embodiments may involve combinations of features, which may exist independently or in combination. The present invention is not specifically limited to the preferred embodiments. The scope of the present invention is defined by the claims.

[0039] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sled needle plate for fixing bones, the sled needle plate comprising a pair of needle bodies, the tail end of each needle body being fixed to the bone by a screw, the head end of each needle body being formed with a needle tip, characterized in that: A pair of needle bodies are formed into a connecting section, an extension section and an implantation section from the tail end to the head end. The needle body is connected to the screw through the connecting section. The connecting section of at least one needle body is arranged around the screw to be suitable for driving the corresponding needle body as a whole to rotate around the screw.

2. The sled needle plate according to claim 1, characterized in that It also includes a plate body, which is formed with a through hole extending toward the bone, and the through hole is used for the screw to pass through. An arc-shaped groove surrounding the screw is formed at the bottom of the plate body. The connecting sections of a pair of needle bodies are separately arranged, and the connecting section of each needle body is arranged at the bottom of the plate body. The connecting section of at least one needle body is formed into an arc that matches the shape of the groove, so that the connecting section can be embedded in the groove and can be guided and moved along the groove track in the groove, thereby driving the corresponding needle body as a whole to rotate around the screw.

3. The sled needle plate according to claim 2, characterized in that The grooves are arranged in two directions along the extension section, and the connecting sections of a pair of needle bodies are formed into arcs that match the shape of the grooves. The connecting section of one needle body is embedded in one groove and the extension section is led out from one side of the plate body, and the connecting section of the other needle body is embedded in the other groove and the extension section is led out from the other side of the plate body.

4. The sled needle plate according to claim 1, wherein: The connecting sections of the pair of needle bodies are integrally formed into a spiral shape, and the spiral center hole of the spiral extends toward the bone, and the spiral center hole is used for passing the screw.

5. The ski needle plate according to claim 4, characterized in that The spiral is formed into a 540-degree spiral.

6. An intraoperative bending tool for performing intraoperative bending on a sled needle plate according to any one of claims 1 to 5, the intraoperative bending tool comprising a pair of tool bodies pivotally connected to each other, characterized in that: A pair of rotating modules are symmetrically arranged at the head end of one tool body, and a fixed module is arranged at the head end of the other tool body. The fixed module is located between the pair of rotating modules, and the fixed module is provided with a fixed column. Each rotating module is provided with a rotatable turntable, and at least two adjustment columns of different diameters are arranged on the turntable around the rotation center line of the turntable.

7. The intraoperative bending tool according to claim 6, characterized in that: A mounting seat is provided at the head end of the tool body, and a first accommodating cavity for setting a turntable is formed on both sides of the mounting seat, and a second accommodating cavity is formed in the middle of the mounting seat. The fixing module is provided with a fixing seat, and a fixing column is provided on the fixing seat. The shape of the fixing seat matches that of the second accommodating cavity, so that when a pair of tool bodies are in the starting state of bending, the fixing seat can be embedded in the second accommodating cavity.

8. The intraoperative bending tool according to claim 6, characterized in that: Each tool body is provided with a handle and a pivot seat. The pivot seat of the tool body corresponding to the rotating module is a double-plate structure, and the pivot seat of the tool body corresponding to the fixed module is a single-plate structure. The single-plate structure is arranged between the double-plate structures.

9. The intraoperative bending tool according to claim 8, characterized in that: The pivot shaft is simultaneously provided through the single-plate structure and the double-plate structure.

10. The intraoperative bending tool according to claim 8, characterized in that: The rotating module is arranged in the lower area of the double-board structure head end, the upper area of the double-board structure head end is an open structure, the fixed module is arranged in the upper area of the single-board structure head end, and the lower area of the single-board structure head end is a retracted structure.

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