CN215129957U

CN215129957U - Rod bending device for connecting rod for orthopedic spinal surgery

Info

Publication number: CN215129957U
Application number: CN202121544770.4U
Authority: CN
Inventors: 付兆宗; 司沙沙; 陈忠羡
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-07-07
Filing date: 2021-07-07
Publication date: 2021-12-14
Anticipated expiration: 2031-07-07

Abstract

The utility model discloses a rod bending device for connecting rod for orthopedic spinal surgery, which comprises a rigid frame bearing disc, a bending component, a sliding rod and sliding pieces, wherein the sliding rod is provided with a plurality of parallel rods which are erected in the rigid frame bearing disc, each sliding rod is provided with a group of sliding pieces, and each group of sliding pieces has the same length and are positioned on the same side to form an array; the press bending assembly comprises a top pressure plate and a driving mechanism; during bending, the distribution of the sliding piece array is changed, the sliding pieces are shifted along the sliding rod, a gap is formed between the sliding pieces on the two sides, and the radian required by the connecting rod is limited by the edge of the gap; the connecting rod blank is placed in the gap, the jacking plate pushes the sliding parts to synchronously move under the driving of the driving mechanism to realize the resetting of the sliding parts on the two sides, the bending radian is more accurately controlled through a multi-point rod bending principle, the sliding parts are directly pressed and molded at one time, and the operation is simple and convenient; the connecting rod bears on the rod bending device and is clamped by multiple points, so that the clamping effect is good, and the connecting rod is not easy to slide and pop up.

Description

Rod bending device for connecting rod for orthopedic spinal surgery

Technical Field

The utility model relates to the field of medical equipment, specifically be applied to the curved excellent ware that the connective bar was bent in orthopedics backbone operation.

Background

Rod and nail techniques (pedicle screw internal fixation, vertebral body screw internal fixation, etc.) are the most commonly used techniques in spinal surgery. After the screw implantation is completed, the physiological curvature of the spine is restored or the deformity is corrected by placing a connecting rod with a proper radian. Therefore, how to press the connecting rod into a proper arc by using the rod bender is very critical.

The most common prior art is the rod bender of the three-point principle, such as the rod bender disclosed in the utility model patent of patent publication No. CN205913389U, which comprises a pair of long arms, a pivot and a bending component, and on the basis of the three-point rod bender principle, an arc measuring scale and a measuring scale positioned at the end of the long arm are added, so that the radian of the rod bender can be displayed; for another example, patent publication is CN 212015745U's utility model patent discloses an adjustable curved excellent ware, including controlling binding clip and controlling the pincers handle, still include sliding plate and angular surveying ware simultaneously, be provided with the subassembly of buckling that gives the three point bending on the sliding plate, through dismantling binding clip portion and sliding plate, the subassembly of buckling about the curved excellent ware, realize different radian of buckling.

However, the rod bender has the following disadvantages: (1) the accuracy is poor, and because the stress points of the connecting rod are few, the bending back angle can be determined only by the experience of a doctor, so that the error is large; (2) the connecting rod bending device has no reproducibility and goodness of fit, and as the current radian cannot be controlled and measured in the bending operation, even if a preoperative doctor plans the radian of the rod according to imaging data, the traditional rod bending device cannot manufacture the connecting rod which conforms to the preoperative plan; (3) the device has the advantages that the continuity is not realized, the time and the labor are wasted, the longer connecting rod cannot be formed at one time due to the small opening of the rod bender, and the rod bender needs to be moved repeatedly when the operation range is large (more than 2 sections), so that the operation is complex and the time is wasted; (4) the S-shaped bent rod cannot be accurately realized, for a patient with scoliosis or severe osteoporosis, a long-segment operation usually involves two physiological curvatures, the connecting rod needs to be subjected to the S-shaped bending, the direction of the bent rod of the existing rod bender is single, even under the premise that a simulation rod is used for reference, the bent rod is difficult to be accurately bent to the required radian, repeated operation is needed, the rigidity of the connecting rod is reduced, and the risk of postoperative nail breakage, rod breakage or internal fixation loosening is increased; (5) the holding force is poor, the rod is easy to slide off, the existing rod bending device is easy to slide off when bending a short rod, and even pops up, so that an operating doctor can be injured, or the spinal cord and nerves of a patient can be injured, and the function is influenced.

Therefore, there is a need to design a rod bender capable of precisely bending a rod, continuously bending a rod, saving time and labor, being safe and forming at one time to overcome the defects of poor precision, repeated operation, easy slipping and the like in rod bending in the prior art.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides a rod bending device for an orthopedic spine operation connecting rod.

The utility model provides a technical scheme that its technical problem adopted is:

a rod bending device for connecting rods for orthopedic spinal surgeries comprises a rigid frame bearing disc, a bending component, sliding rods and sliding pieces, wherein the sliding rods are provided with a plurality of parallel sliding pieces which are erected in the rigid frame bearing disc to form a fence-like structure, each sliding rod is provided with a group of sliding pieces in a penetrating manner, the length of each group of sliding pieces is consistent, the sliding pieces are positioned on the same side of the rigid frame bearing disc to form an array, and the bending component is positioned on the other side of the rigid frame bearing disc; the press bending assembly comprises a top pressure plate and a driving mechanism, wherein the top pressure plate is vertically arranged with the sliding rod, and the driving mechanism drives the top pressure plate to slide towards the sliding piece; the distribution condition of the sliding part arrays is changed to form a gap matched with the radian of the connecting rod, and the sliding part arrays on the two sides of the gap clamp the connecting rod blank to realize the bending of the connecting rod under the pushing of the jacking plate.

The sliding part is a round ball.

The sliding pieces form concave surfaces along two opposite side surfaces on the axis of the through hole, and a space for clamping the connecting rod is formed between the concave surfaces of every two sliding pieces.

The driving mechanism comprises a link arm and a driving rod, the middle part of the link arm is hinged with the rigid frame bearing disc, the lower end part of the link arm is hinged with the end part of the driving rod, and the other end part of the driving rod is hinged with the jacking plate.

The link arm includes straight arm portion and curved arm portion, and the intersection of straight arm portion and curved arm portion is equipped with rigid frame bears the articulated joint of dish articulated, curved arm portion tip with the tip of actuating lever is articulated.

And the side part of the rigid frame bearing plate is provided with a clearance avoiding opening (31) corresponding to the swinging position of the link arm.

The top pressure plate penetrates through the sliding rod through a plurality of through holes formed in the top pressure plate and slides along the sliding rod.

The driving rod comprises a screw rod and a screwing sleeve, and the screwing sleeve can rotate relative to the screw rod to adjust the length of the driving rod.

The utility model has the advantages that:

(1) different from the traditional three-point rod bender, the utility model forms a plurality of stress points on the connecting rod by a plurality of groups of sliding parts to form an array, thereby realizing multi-point rod bending and more accurately quantifying and controlling radian;

(2) arranging the arc shape of the connecting rod by adopting a plurality of sliding part arrays of a sliding module; can adjust the array of slider according to experience, also can obtain individuation, accurate radian behind the preinstallation simulation stick, in the middle of impressing the slider with the good simulation stick that bends again, obtain required arc shape, form with internal 1: 1 arc; the latter is particularly safe and efficient in spinal orthopaedic surgery, or in patients with severe osteoporosis requiring long-segment in situ fixation;

(3) after the connecting rod is placed, the utility model is directly pressed and formed at one time through the sliding module, and the operation is simpler and more convenient;

(4) the utility model discloses a curved excellent ware is last and by the multiple spot centre gripping, the centre gripping is effectual and difficult landing and pop out.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a top view of FIG. 1;

fig. 3 is a schematic structural view of the split array of the sliding module of the present invention;

FIG. 4 is a top view of FIG. 3;

FIG. 5 is a schematic structural view of the present invention during bending;

FIG. 6 is a top view of FIG. 5;

fig. 7 is a schematic structural view of a first embodiment of the sliding member of the present invention;

fig. 8 is a schematic structural view of a second embodiment of the sliding member of the present invention;

fig. 9 is a schematic structural view of the press bending assembly of the present invention;

fig. 10 and 11 are schematic views of the bending assembly according to the present invention.

Detailed Description

Referring to fig. 1 and 2, the rod bending device for the connecting rod for the orthopedic spinal surgery comprises a rigid frame bearing disc 1, a bending assembly 2, a sliding rod 3 and a sliding part 4, wherein the rigid frame bearing disc 1 is provided with a rectangular metal frame, and the bending assembly 2 comprises a jacking plate 5 which is perpendicular to the sliding rod 3 and a driving mechanism 6 which drives the jacking plate 5 to slide towards the sliding part 4; the sliding rods 3 are metal rods with smooth surfaces and are provided with a plurality of parallel bars which are erected in the rigid frame bearing disc 1 to form a fence-like structure, a group of sliding pieces 4 are arranged on each sliding rod 3 in a penetrating mode, and when the size of each sliding piece 4 is smaller, the sliding rods 3 are more and more densely arranged, and the accuracy of the bent rods is higher.

Normally, the sliding members 4 are arranged on the same side of the rigid frame carrier plate 1 to form an array, and the bending members 2 are located on the other side of the rigid frame carrier plate 1.

As shown in fig. 3 to 6, when the connecting rod is formed by bending using the rod bender, firstly, the radian of the connecting rod is determined according to actual requirements, the distribution of the array of the sliding members 4 is changed, the sliding members 4 are pushed to be separated into left and right sides, a gap is formed between the sliding members on the separated sides, and the radian of the connecting rod is defined by the edge of the gap. At the moment, the connecting rod blank is placed in the gap, the jacking plate 5 is driven by the driving mechanism 6 to push the sliding piece 4 to move and reset along the sliding rod 3, meanwhile, the sliding pieces 4 on two sides are combined to clamp and extrude the connecting rod, multiple groups of sliding pieces apply force to realize multipoint bent rods, the radian of the bent rods can be controlled more accurately, and the connecting rod with the preset radian can be obtained at one time. Further, a dummy rod may be pressed into the slider 4, and the array distribution of the slider 4 may be adjusted according to the curvature of the dummy rod; the simulation stick is planned well in advance after obtaining accurate data according to individual disease's examination report, image data etc. consequently, can obtain individuation, more accurate radian through installing the simulation stick in advance, form with patient internal vertebra 1: 1, through which the connecting rod is bent, is particularly safe and efficient in spinal orthopedic surgery or patients with severe osteoporosis who require long-segment in-situ fixation.

As the preferred embodiment of the present invention, the sliding member 4 is a metal ball with a central circular hole (as shown in fig. 7), and the other preferred embodiment, the sliding member 4 is provided with arc-shaped grooves 41 (as shown in fig. 8) on the opposite surface between two pairs, and the central hole is penetrated between the arc-shaped grooves on both sides, so as to realize better fixation by blocking the surface of the connecting rod through the arc-shaped grooves, and to make the connecting rod more stably stressed and bent. In addition to the above embodiments, the sliding member 4 has many variations, such as the design of the opposite surfaces of the sliding member as flat surfaces, and the like, which are not described herein.

The driving mechanism 6 can be set to be semi-automatic or manual, the semi-automatic can be driven by the power supplied by the power element such as air rod or motor, and the preferred embodiment of the present invention adopts manual driving mechanism, as shown in fig. 9 to fig. 11, it includes a link arm 7 and a driving rod 8, the middle part of the link arm 7 is hinged with the side part of the rigid frame bearing plate 1 to form a lever structure, the lower end part is hinged with the end part of the driving rod 8, the other end part of the driving rod 8 is hinged with the top pressure plate 5; the link arm 7 comprises a straight arm part 71 and a bent arm part 72, a hinge joint hinged with the side part of the rigid frame bearing plate 1 is arranged at the intersection of the straight arm part 71 and the bent arm part 72, the end part of the bent arm part 72 is hinged with the end part of the driving rod 8, the other end part of the driving rod 8 is hinged with the top pressure plate 5, a user can grab the straight arm part 72 to apply force, the bent arm part 73 can better apply force and transmit the force to the driving rod 8, and the connecting rod blank can be more easily bent through the lever principle. And the side part of the rigid frame bearing plate 1 is provided with a clearance 11 corresponding to the swinging position of the link arm 7, so that the link arm 7 can swing more flexibly.

Preferably, the top pressure plate 5 is provided with a plurality of avoiding holes 61 corresponding to the sliding rod 3, the top pressure plate 5 is sleeved on the sliding rod 3 through the avoiding holes 61 and slides along the sliding rod 3, so that the top pressure plate 5 and the sliding part 4 are on the same level, and the sliding part 4 can be better pressed by applying force.

Preferably, the driving rod 8 includes a screw 81 and a screwing sleeve 82, and the screwing sleeve 82 can rotate relative to the screw 81 to adjust the length of the driving rod 8, and thus the moving distance of the top pressure plate.

The above-mentioned embodiment is only the utility model discloses a preferred embodiment can not be used for the restriction the utility model discloses a protection scope to this technical field's ordinary technical personnel, does not deviate from the utility model discloses under the prerequisite of principle, all realize with basically the same technical means the utility model discloses a technical purpose and technological effect all should belong to the utility model discloses a protection scope.

Claims

1. The utility model provides a curved excellent ware that is used for orthopedics backbone operation connective bar which characterized in that: the fence-like structure comprises a rigid frame bearing disc (1), a bending component (2), sliding rods (3) and sliding pieces (4), wherein the sliding rods (3) are provided with a plurality of parallel frames which are erected in the rigid frame bearing disc (1) to form a fence-like structure, each sliding rod (3) is provided with a group of sliding pieces (4) in a penetrating manner, the sliding pieces (4) are positioned at the same side of the rigid frame bearing disc (1) to form an array, and the bending component (2) is positioned at the other side of the rigid frame bearing disc (1); the press bending assembly (2) comprises a jacking plate (5) and a driving mechanism (6), wherein the jacking plate (5) is perpendicular to the sliding rod (3), and the driving mechanism drives the jacking plate (5) to slide towards the sliding piece (4); gaps matched with the radian of the connecting rods are formed by changing the distribution condition of the arrays of the sliding parts (4), and the sliding parts on the two sides of the gaps clamp the connecting rod blanks to realize the bending of the connecting rods under the pushing of the jacking plate (5).

2. The rod bender according to claim 1, wherein: the sliding part (4) is a round ball.

3. The rod bender according to claim 1, wherein: the sliding pieces (4) form inner concave surfaces (41) along two opposite side surfaces on the axis of the through hole, and a space for clamping the connecting rod is formed between the inner concave surfaces (41) of every two sliding pieces.

4. The rod bender according to claim 1, wherein: the driving mechanism (6) comprises a link arm (7) and a driving rod (8), the middle part of the link arm (7) is hinged with the rigid frame bearing disc (1), the lower end part of the link arm is hinged with the end part of the driving rod (8), and the other end part of the driving rod (8) is hinged with the jacking plate (5).

5. The rod bender according to claim 4, wherein: the link arm (7) comprises a straight arm part (71) and a bent arm part (72), a hinge joint hinged with the rigid frame bearing plate (1) is arranged at the intersection of the straight arm part (71) and the bent arm part (72), and the end part of the bent arm part (72) is hinged with the end part of the driving rod (8).

6. A rod bender according to claim 2 or 3, characterized in that: and a clearance avoiding opening (11) is formed in the side part of the rigid frame bearing plate (1) corresponding to the swinging position of the link arm (7).

7. A rod bender according to claim 1 or 2 or 3, characterized in that: the jacking plate (5) penetrates through the sliding rod (3) through a plurality of through holes (51) formed in the jacking plate and slides along the sliding rod (3).

8. The rod bender according to claim 4, wherein: the driving rod (8) comprises a screw rod (81) and a screwing sleeve (82), and the screwing sleeve (82) can rotate relative to the screw rod (81) to adjust the length of the driving rod (8).