CN205458838U - TLIF operation passageway intervertebral struts ware - Google Patents

Abstract

An intervertebral spreader for TLIF operation channel, which relates to the technical field of medical appliances, is provided with a spreader rack, and the spreader rack is provided with two spreader arms, of which at least one spreader arm can move along the spreader rack Sliding longitudinally, the spreading arm that can slide longitudinally along the spreading rack is provided with anti-reverse pawls that match the spreading rack, and the two spreading arms are respectively equipped with vertebral arches for connecting with pedicle screws A screw sleeve, a traction seat is provided on the spread rack between the two spread arms, a sliding hole is provided on the traction seat, a traction screw is arranged in the slide hole, and a traction screw is provided on the traction screw on the rear side of the traction seat. Nut, the traction screw front part of traction seat front side is provided with traction hook plate. The utility model has the advantages of simple structure and convenient use, does not affect the operation operation, and can quickly establish a stable operation channel.

Description

TLIF surgical channel intervertebral distractor

technical field

The invention relates to the technical field of medical appliances, in detail, it is a TLIF surgical channel intervertebral distractor that is simple in structure, easy to use, does not affect the surgical operation, and can quickly establish the surgical channel.

Background technique

We know that decompression, fixation, and fusion are the three principles of spinal internal fixation surgery. Intraoperative decompression and intervertebral treatment operations need to fully expose the decompression area as much as possible to stabilize the upper and lower vertebral bodies. At present, the clinical preoperative channel establishment method is: implant pedicle screws on the vertebral body that needs to be expanded, install connecting rods on the pedicle screws, and use distracting forceps to apply force through the connecting rods to support the vertebral body. Open, use top wire to fix; achieve the purpose of vertebral body distraction and stability. It has the following disadvantages: the connecting rod just blocks the surgical operation area, which affects the surgical operation, it is difficult to operate completely outside the nerve root, it is easy to cause damage to the cauda equina of the nerve root, and it is difficult to implant the fusion device. The top wire and pedicle screw need to be locked repeatedly, which is easy to damage the top wire and pedicle screw of the implant, and thus easily cause damage to the patient; it is impossible to establish a channel for minimally invasive operation of small incision; the skin and soft tissue at the incision need to use other The appliance is pulled and stretched, and the operation is cumbersome, time-consuming and labor-intensive.

Contents of the invention

The purpose of the present invention is to solve the above-mentioned deficiencies in the prior art, to provide a kind of intervertebral spacer with simple structure, easy to use, without affecting the operation operation, and quickly establishing TLIF (transforaminal intervertebral fusion) operation channel .

The technical solution adopted by the present invention to solve the deficiencies in the prior art is:

A TLIF operation channel intervertebral distractor, characterized in that: a distraction rack is provided, and two distraction arms are arranged on the distraction rack, at least one of which can slide longitudinally along the distraction rack , the spreader arm that can slide longitudinally along the spreader rack is provided with a non-return pawl that matches the spreader rack, and the two spreader arms are respectively equipped with pedicle screws for connecting with pedicle screws Sleeve, the stretching rack between the two stretching arms is provided with a traction seat, the traction seat is provided with a slide hole, a traction screw is arranged in the slide hole, and a traction nut is provided on the traction screw at the rear side of the traction seat. A traction hook plate is arranged on the front part of the traction screw on the front side of the traction seat.

The pedicle screw sleeve described in the present invention is arranged at the front end of the distracting arm.

The structure in which the spreading arm can slide longitudinally along the spreading rack in the present invention is: the spreading arm is provided with a chute, and the spreading rack is freely slidably mounted in the chute.

The structure of the non-return ratchet matched with the spread rack described in the present invention is: a hinge seat is provided on the spread arm, the middle part of the non-return ratchet is hinged with the hinge seat, and the front part of the non-return ratchet is The anti-reverse teeth matched with the spread rack, and the rear part of the anti-reverse ratchet are provided with a pressing handle, and a return spring is arranged between the pressing handle and the hinged seat.

The hinged seat described in the present invention is provided with a rotating shaft, and a spreading gear meshed with the spreading rack is arranged on the rotating shaft, and a rotating handle is provided at one end of the rotating shaft. During use, the rotating handle is manipulated to drive the rotating shaft to rotate, so that the spreading gear moves on the spreading rack, drives the hinged seat, and drives the spreading arm to move. The operation is simple, time-saving and labor-saving, and the spacing between the vertebral bodies can be quantified and gradually adjusted, which is beneficial to the operation.

The structure of the pedicle screw sleeve in the present invention is as follows: a cylindrical body is provided, and a longitudinal fitting hole is arranged in the cylindrical body to fit and connect with the head of the pedicle screw. The cylinder body on the opposite side of the two pedicle screw sleeves is provided with a viewing window with an open lower end, so as to increase the operating space as much as possible and facilitate intraoperative operation.

The two spreading arms described in the present invention are respectively hinged with connecting seats, and the two spreading arms are connected with the spreading racks through the connecting seats. The spreading arm and the connecting seat are relatively static and do not move in the longitudinal direction of the spreading rack. During use, the angle between the pedicle screw sleeve and the pedicle screw can be properly adjusted, so that the pedicle screw sleeve can be more easily sleeved on the pedicle screw, which is convenient to operate and saves operation time.

Among the two spreading arms described in the present invention, the connecting seat at the rear end of one of the spreading arms is fixedly connected with the spreading rack, and the connecting seat at the rear end of the other spreading arm is provided with a chute, and the spreading teeth The strips can slide freely in the chute.

When the present invention is in use, pedicle screws are implanted on the upper and lower vertebral bodies of the required operation segment through the surgical incision, and the pedicle screw sleeve is used to connect with the head of the pedicle screw; the traction hook plate is placed in the surgical incision . Separate the two spreading arms outward on the spreading rack, drive the pedicle screw sleeve and the pedicle screw to spread the vertebral body, and the separated spreading arms are in the contact between the anti-reverse pawl and the spreading rack. Under cooperation, it will not slide inward on the spreader rack due to the force; turning the traction nut drives the traction bolt and the traction hook plate to pull the skin and other soft tissues backward to establish a surgical channel. The invention has the advantages of simple structure and convenient use, does not affect the operation operation, and can quickly establish a stable operation channel.

Description of drawings

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

Fig. 2 is a bottom view of Fig. 1 .

Fig. 3 is a schematic diagram of the three-dimensional structure of the present invention.

detailed description

The TLIF surgical channel intervertebral distractor shown in Figure 1-3 is provided with a distraction rack 6, and the distraction rack 6 is provided with two mutually parallel distraction arms 11, at least one of which is a distraction arm. 11 can slide longitudinally along the stretching rack 6, as can be seen from the figure, the structure that the stretching arm can slide longitudinally along the stretching rack is: the stretching arm 11 is provided with a chute, and the stretching rack can be freely The sliding part is installed in the chute. The stretching arm 11 that can slide longitudinally along the stretching rack is provided with a non-return pawl 3 that cooperates with the stretching rack 6. The structure of the non-return pawl described in this embodiment is: the stretching arm 11 There is a hinge seat 2 on the top, the middle part of the non-return pawl 3 is hinged with the hinge seat 2 through the pin shaft, the front part of the non-return pawl 3 is a non-return tooth matched with the teeth of the rack, and the non-return pawl 3 The rear part is provided with a push handle 14, and a return spring is provided between the push handle 14 and the hinge seat 2; during use, the stretch arm 11 that can slide outwards along the longitudinal slide of the stretch rack makes the two stretch arms When the spacing is increased, the elastic force of the return spring makes the non-reverse teeth of the non-return pawl closely contact with the teeth of the spread rack, preventing the spread arm that can slide inwardly along the longitudinal slide of the spread rack due to external force. When the distance between the two spreading arms is reduced or disassembled, the pressing handle is pressed downwards, and the anti-reverse teeth of the non-return pawl are separated from the teeth of the spreading rack, and corresponding operations can be performed. The two spreading arms are respectively provided with pedicle screw sleeves 12 for connecting with the pedicle screws. The pedicle screw sleeves 12 are arranged at the front ends of the spreading arms. The midline of the open arm is vertical; the structure of the pedicle screw sleeve 12 is: a cylinder is provided, and a longitudinal sleeve hole is provided in the cylinder to be sleeved and connected with the head of the pedicle screw. The cylinder body on the opposite side of the two pedicle screw sleeves is provided with a viewing window with an open lower end, so as to increase the operating space as much as possible and facilitate intraoperative operation. The stretching tooth bar between two stretching arms is provided with traction seat 13, and traction seat 13 is provided with slide hole, is provided with the traction screw rod 9 that can slide freely in the slide hole, the traction screw rod 9 of traction seat 13 rear sides Be provided with traction nut 4 on, traction hook plate 10 is provided on the traction screw rod 9 front ends of traction seat 13 front sides, traction hook plate 10 is parallel with pedicle screw sleeve, vertical with strut arm and strut tooth bar.

The present invention is further improved, the hinged seat 2 is provided with a rotating shaft 1, the rotating shaft 1 is provided with a spreading gear meshed with the spreading rack, and one end of the rotating shaft is provided with a rotating handle 7. During use, control the rotating handle 7 to drive the rotating shaft 1 to rotate, so that the spreading gear moves on the spreading rack 6, drives the hinged seat, and drives the spreading arm to move. The operation is simple, time-saving and labor-saving, and the spacing between the vertebral bodies can be quantified and gradually adjusted, which is beneficial to the operation.

The present invention is further improved, the two spreading arms 11 are respectively hinged with connecting seats 8, and the two spreading arms are connected with the spreading racks through the connecting seats 8. As can be seen from the figure, among the two spreading arms described in this embodiment, the connecting seat 8 at the rear end of one of the spreading arms is fixedly connected with the spreading rack, and the connecting seat 8 at the rear end of the other spreading arm is 8 is provided with a chute, and the tooth bar can be freely slidable and set in the chute. The spreading arm and the connecting seat are relatively static and do not move in the longitudinal direction of the spreading rack. During use, the angle between the pedicle screw sleeve and the pedicle screw can be properly adjusted, so that the pedicle screw sleeve can be more easily sleeved on the pedicle screw, which is convenient to operate and saves operation time. The said stretching rack is provided with a chute 15 along its longitudinal direction, and the lower part of the traction seat is provided with a slide block 5 matched with the chute, and the slide block 5 can slide longitudinally along the chute 15 and is embedded in the chute; When in use, the traction seat can adjust its position on the spreading rack according to actual conditions, so as to be suitable for patients with different sizes of surgical incisions.

When the present invention is in use, a pedicle screw is implanted on the vertebral body to be stretched through an operation incision, and a pedicle screw sleeve is used to connect with the head of the pedicle screw; the traction hook plate is placed in the operation incision. Separate the two spreading arms outward on the spreading rack, drive the pedicle screw sleeve and the pedicle screw to spread the vertebral body, and the separated spreading arms are in the contact between the anti-reverse pawl and the spreading rack. Under cooperation, it will not slide inward on the spreader rack due to the force; turning the traction nut drives the traction bolt and the traction hook plate to pull the skin and other soft tissues backward to establish a surgical channel. The invention has the advantages of simple structure and convenient use, does not affect the operation operation, and can quickly establish a stable operation channel.

Claims (8)

1. A TLIF operation channel intervertebral distractor, characterized in that: it is provided with a distraction rack, and the distraction rack is provided with two distraction arms, wherein at least one of the distraction arms can be stretched along the stretcher rack. Sliding longitudinally, the spreading arm that can slide longitudinally along the spreading rack is provided with anti-reverse pawls that match the spreading rack, and the two spreading arms are respectively equipped with vertebral arches for connecting with pedicle screws A screw sleeve, a traction seat is provided on the spread rack between the two spread arms, a sliding hole is provided on the traction seat, a traction screw is arranged in the slide hole, and a traction screw is provided on the traction screw on the rear side of the traction seat. Nut, the traction screw front part of traction seat front side is provided with traction hook plate. 2. The TLIF surgical channel intervertebral distractor according to claim 1, wherein the pedicle screw sleeve is arranged at the front end of the distracting arm. 3. The TLIF surgical channel intervertebral distractor according to claim 1 or 2, characterized in that: the structure in which the distracting arm can slide longitudinally along the distracting rack is: the spreading arm is provided with a chute , the rack can be freely slidable and set in the chute. 4. The intervertebral distractor for TLIF operation channel according to claim 3, characterized in that: the structure of the non-return ratchet matched with the distracting rack is: the distracting arm is provided with a hinged seat, The middle part of the non-return pawl is hinged with the hinge seat, the front part of the non-return pawl is the non-return tooth matched with the spread rack, the rear part of the non-return pawl is provided with a pressing handle, and the pressing handle and the hinge seat are provided with a With return spring. 5. The TLIF surgical channel intervertebral distractor according to claim 4, characterized in that: the hinged seat is provided with a rotating shaft, and the rotating shaft is provided with a spreading gear meshed with the spreading rack, and the rotating shaft One end of the shaft is provided with a rotating handle. 6. The TLIF surgical channel intervertebral distractor according to claim 4 or 5, characterized in that: the structure of the pedicle screw sleeve is: a cylinder is provided, and a cylinder with a pedicle is provided. The screw head fits into the longitudinal fitting hole of the connection. 7. The TLIF surgical channel intervertebral distractor according to claim 6, characterized in that: the two spreading arms are respectively hinged with connecting seats, and the two spreading arms are connected to the spreading rack through the connecting seats connected. 8. The TLIF surgical channel intervertebral distractor according to claim 7, characterized in that: among the two spreading arms, the connecting seat at the rear end of one of the spreading arms is fixedly connected to the spreading rack, The connecting seat at the rear end of the other spreading arm is provided with a chute, and the spreading rack is freely slidably passed through the chute.