Synchronization symmetrical spine pre-bending rod tool

Abstract

The utility model relates to the technical field of medical instruments, and discloses a synchronous symmetrical spine pre-bending rod tool which comprises a base, a lower shaping seat, a door frame and a pressing rod. A lower shaping seat is arranged at the upper part of one end of the base; the end face of the lower shaping base is circular, and two inwards-sunken first groove bodies are formed in the circumferential face of the lower shaping base side by side. The door frame is obliquely and outwards arranged on the lower shaping seat; one end of the pressing rod is a handle, the other end of the pressing rod is provided with a pressing head matched with the lower shaping seat, and two sides of the pressing head are hinged with the lower shaping seat. According to the synchronous symmetrical spine pre-bending rod tool, the pressing rod is operated to drive the pressing head to rotate relative to the lower shaping base on the base, two titanium rods which penetrate through the portal frame and are located between the pressing head and the lower shaping base are bent at the same time according to the lever principle, and the purpose of simultaneously pre-bending the two titanium rods at a time is achieved. The two titanium rods are pre-bent at a time, the symmetry of the two titanium rods can be guaranteed, the two titanium rods have the same curvature, and pains of the chest, the waist and the back of a patient and failure of an internal fixing object after operation are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, and in particular to 1. a synchronous symmetrical spinal pre-bending rod tool. Background Art

[0002] Spinal pedicle screw rods are widely used in spinal surgery because they can meet the principle of three-column fixation of the spine. Spinal pedicle screw rods consist of pedicle screws and titanium rods connected at the back. Since the spine is not a straight line, but an S-shaped curve, the titanium rod needs to be bent into a curved shape according to the patient's spine shape. The spine is bilaterally symmetrical along the midline, and the pedicles are bilaterally symmetrical, so two titanium rods are generally required for fixation.

[0003] At present, the tools for bending titanium rods can only bend one metal rod at a time. After bending once, another metal rod needs to be bent again. In order to ensure that the two metal rods have the same curvature, the second rod can only be bent according to the curvature of the first bent rod. The operation is cumbersome and the curvature of the two metal rods cannot be guaranteed to be completely consistent, which may cause postoperative chest, waist and back pain in patients and failure of internal fixation. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a synchronous and symmetrical spinal pre-bending rod tool.

[0005] The technical solution adopted by the utility model is:

[0006] A synchronous symmetrical spinal pre-bending rod tool, which includes a base, a lower shaping seat, a door frame and a pressure rod; the base is in an elongated strip shape, and a lower shaping seat is provided on the upper part of one end of the base; the end face of the lower shaping seat is circular, and two inwardly recessed first grooves are arranged side by side on its circumferential surface; the door frame is in an N-shape as a whole, and is arranged on the lower shaping seat in an inclined manner outward; the pressure rod is a bent rod body, one end of the rod body is a handle, and the other end of the rod body is formed with a pressure head that cooperates with the lower shaping seat, and the two sides of the pressure head are hinged to the lower shaping seat.

[0007] Furthermore, two groups of auxiliary fixing plates extending outward are symmetrically arranged on both sides of the base, and the bottom surfaces of the auxiliary fixing plates and the bottom surface of the base are located on the same plane.

[0008] Furthermore, the auxiliary fixing plate is provided with a through hole for the matching screw to pass through.

[0009] Furthermore, the diameter of the first trough body is slightly larger than the diameter of the titanium rod.

[0010] Furthermore, the bottom of the lower shaping seat is fixedly connected to the base, or the lower shaping seat and the base are integrally formed.

[0011] Furthermore, the width of the door frame is sufficient for two titanium rods to pass through in parallel; the side rods on both sides of the door frame are fixedly connected to the lower shaping seat at the bottom and fixedly connected to the cross bar of the door frame at the top.

[0012] Furthermore, two inwardly recessed second slots are arranged side by side on the crossbar of the door frame, and the two second slots are in the same straight line as the two first slots.

[0013] Furthermore, connecting plates are installed on both sides of the pressure head through pins, and the end of the connecting plate away from the pressure head is rotatably installed at the center position of the lower shaping seat through a rotating shaft.

[0014] Furthermore, two inwardly recessed third grooves are arranged side by side on the bottom surface of the pressure head; the third grooves and the first grooves are on the same vertical plane.

[0015] Beneficial effects of the utility model:

[0016] The synchronous symmetrical spinal pre-bending rod tool drives the pressure head to rotate relative to the lower shaping seat on the base by operating the pressure rod, and uses the lever principle to simultaneously bend the two titanium rods passing through the door frame and between the pressure head and the lower shaping seat, so as to achieve the purpose of pre-bending two titanium rods at the same time. Since the two titanium rods are pre-bent at one time, the symmetry of the two titanium rods can be guaranteed, so that the two titanium rods have the same curvature, avoiding postoperative chest, waist and back pain and failure of internal fixation devices in patients. In addition, since the bending process of the titanium rod is performed according to the patient's actual spine during the operation, pre-bending two titanium rods at one time with the above tool can save precious operation time, shorten the patient's surgical anesthesia time, and reduce surgical risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the synchronous and symmetrical spinal pre-bending rod tool of the utility model;

[0018] Figure 2 This is a schematic diagram of the use state of the synchronous symmetrical spinal pre-bending rod tool of the utility model;

[0019] Figure 3 It is a schematic diagram of the cooperation between the pressing head and the lower shaping seat of the synchronous symmetrical spinal pre-bending rod tool of the utility model;

[0020] In the figure: 1. base; 2. lower shaping seat; 3. door frame; 4. pressure rod; 5. first trough body; 6. handle; 7. pressure head; 8. auxiliary fixing plate; 9. side rod; 10. cross rod; 11. second trough body; 12. connecting plate; 13. third trough body; 14. titanium rod. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] This embodiment provides a synchronous symmetrical spinal prebending rod tool, such as Figure 1 and Figure 2 As shown, the synchronous symmetrical spinal pre-bending rod tool includes components such as a base 1, a lower shaping seat 2, a door frame 3 and a pressure rod 4. Each component is made of metal materials, and the strength of each component is greater than titanium. Among them, the base 1 is the basic component of the pre-bending rod tool, which enables the device to be placed stably on a flat table or countertop; the base 1 is in the shape of a long strip, which ensures the stability of the pre-bending rod tool during the bending process of the titanium rod. Furthermore, as the preferred technical solution of this embodiment, in order to enhance stability and prevent the pre-bending rod tool from tipping over due to a slight deviation in the force applied during the bending process of the titanium rod; as Figure 1 As shown, in this embodiment, two groups of auxiliary fixing plates 8 extending outward are symmetrically arranged on both sides of the base 1, and the bottom surfaces of the auxiliary fixing plates 8 and the bottom surface of the base 1 are located on the same plane, so that the stability of the base 1 is increased by the auxiliary fixing plates 8; at the same time, the auxiliary fixing plates 8 are provided with through holes for matching screws to pass through, and the pre-bending rod tool can also be fixed on a desktop or tabletop by screws passing through the through holes.

[0023] like Figure 1 and Figure 2 As shown, the overall structure of the lower shaping seat 2 is similar to a wheel, and is located at the upper part of one end of the base 1; during production, the lower shaping seat 2 and the base 1 can be integrally processed and formed, or a split structure can be adopted; when a split structure is adopted, the bottom of the lower shaping seat 2 can be fixed to the base 1 by bolts. The lower shaping seat 2 is the main component for bending the titanium rod, and its end face is circular, and two inwardly concave first grooves 5 are arranged side by side on the circumferential surface. The diameter of the first groove 5 is slightly larger than the diameter of the titanium rod, and the two titanium rods can be bent along the circumferential surface of the lower shaping seat 2 through the first groove 5.

[0024] like Figure 1 and Figure 2 As shown, the door frame 3 is in an N-shape as a whole, and is tilted outwardly and arranged on the lower shaping seat 2; the width of the door frame 3 is sufficient for two titanium rods to pass through in parallel; the side bars 9 on both sides of the door frame 3 are fixedly connected to the lower shaping seat 2 at the bottom, and fixedly connected to the cross bar 10 of the door frame 3 at the top. Figure 2 As shown, the function of the door frame 3 is to limit the non-bent end of the titanium rod. Further, as a preferred technical solution of this embodiment, as Figure 1 and Figure 2As shown, in this embodiment, two inwardly recessed second grooves 11 are arranged side by side on the cross bar 10 of the door frame 3, and the two second grooves 11 are in the same straight line with the two first grooves 5. The second grooves 11 on the cross bar 10 of the door frame 3 can better limit the non-bending end of the titanium rod.

[0025] like Figure 1 and Figure 2 As shown, the pressure rod 4 is a bent rod body, one end of the rod body is a handle 6 for operation, and the other end of the rod body is formed with a pressure head 7 that cooperates with the lower shaping seat 2. The two sides of the pressure head 7 are retracted, and connecting plates 12 are installed on both sides of the pressure head 7 through pins. The connecting plate 12 is rotatably installed at the center position of the lower shaping seat 2 away from one end of the pressure head 7 through a rotating shaft. The pressure head 7 is the main component for bending the titanium rods. The pressure head 7 simultaneously rotates and presses down the two titanium rods that pass through the door frame 3 and are located between the pressure head 7 and the lower shaping seat 2, so that the titanium rods are bent downward along the first groove body 5 on the circumferential surface of the lower shaping seat 2. Furthermore, as the preferred technical solution of this embodiment, in order to ensure that the titanium rods are further limited during the rotation and downward pressing of the pressure head 7, as shown Figure 3 As shown, in this embodiment, two inwardly recessed third grooves 13 are arranged side by side on the bottom surface of the pressing head 7; the two third grooves 13 and the two first grooves 5 are on the same vertical plane, and the third grooves 13 cooperate with the first grooves 5 to ensure that the titanium rod is limited during the rotation and downward pressing process of the pressing head 7.

[0026] The use of the synchronous symmetrical spinal prebending rod tool is as follows Figure 2 As shown, first operate the handle 6 of the pressure rod 4 to rotate the entire pressure rod 4 counterclockwise until the connecting plate 12 is close to the door frame 3; at this time, the two titanium rods 14 are passed through the door frame 3 and then passed between the pressure head 7 and the lower shaping seat 2; operate the handle 6 of the pressure rod 4 again to rotate the entire pressure rod 4 clockwise, the lower shaping seat 2 forms a fulcrum for the two titanium rods 14, and the door frame 3 forms a limit for the non-bending ends of the two titanium rods 14. Using the principle of leverage, the pressure head 7 is rotated and pressed down relative to the lower shaping seat 2 on the base 1, and the two titanium rods 14 are bent at the same time, so as to achieve the purpose of pre-bending the two titanium rods 14 at the same time. Since the two titanium rods 14 are pre-bent at one time, the symmetry of the two titanium rods 14 can be guaranteed, so that the two titanium rods 14 have the same curvature.

[0027] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A synchronous symmetrical spinal prebending rod tool, characterized in that: The synchronous symmetrical spinal pre-bending rod tool comprises a base, a lower shaping seat, a door frame and a pressure rod; the base is in an elongated strip shape, and a lower shaping seat is provided on the upper part of one end of the base; the end face of the lower shaping seat is circular, and two inwardly recessed first grooves are arranged side by side on its circumferential surface; the door frame is in an N-shape as a whole, and is arranged on the lower shaping seat tilted outward; the pressure rod is a bent rod body, one end of the rod body is a handle, and the other end of the rod body is formed with a pressure head that cooperates with the lower shaping seat, and the two sides of the pressure head are hinged to the lower shaping seat.

2. The synchronous symmetrical spinal prebending rod tool according to claim 1, characterized in that: Two groups of auxiliary fixing plates extending outward are symmetrically arranged on both sides of the base, and the bottom surfaces of the auxiliary fixing plates and the bottom surface of the base are located on the same plane.

3. The synchronous symmetrical spinal prebending rod tool according to claim 2, characterized in that: The auxiliary fixing plate is provided with through holes for the matching screws to pass through.

4. The synchronous symmetrical spinal prebending rod tool according to claim 1, characterized in that: The diameter of the first trough body is slightly larger than the diameter of the titanium rod.

5. The synchronous symmetrical spinal prebending rod tool according to claim 1, characterized in that: The bottom of the lower shaping seat is fixedly connected to the base, or the lower shaping seat and the base are integrally formed.

6. The synchronous symmetrical spinal prebending rod tool according to claim 1, characterized in that: The width of the door frame is sufficient for two titanium rods to pass through in parallel; the side rods on both sides of the door frame are fixedly connected to the lower shaping seat at the bottom and fixedly connected to the cross bar of the door frame at the top.

7. The synchronous symmetrical spinal prebending rod tool according to claim 6, characterized in that: Two inwardly recessed second slots are arranged side by side on the crossbar of the door frame, and the two second slots are in the same straight line as the two first slots.

8. The synchronous symmetrical spinal prebending rod tool according to claim 1, characterized in that: Connecting plates are installed on both sides of the pressure head through pins, and one end of the connecting plate away from the pressure head is rotatably installed at the center position of the lower shaping seat through a rotating shaft.

9. The synchronous symmetrical spinal prebending rod tool according to claim 1, characterized in that: Two inwardly concave third grooves are arranged side by side on the bottom surface of the pressure head; the third grooves and the first grooves are on the same vertical plane.

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