CN214907776U

CN214907776U - Posterior longitudinal ligament separating and breaking tool used in total spine monoblock resection

Info

Publication number: CN214907776U
Application number: CN202120534576.1U
Authority: CN
Inventors: 冯毅; 乔晓晨; 吕嘉; 白军军; 田志; 吕智; 王羽姗; 武太勇; 武壮壮
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-15
Filing date: 2021-03-15
Publication date: 2021-11-30
Anticipated expiration: 2031-03-15

Abstract

The utility model belongs to the technical field of the vertebra operation instrument technique and specifically relates to a be arranged in complete vertebra monoblock excision back longitudinal ligament to separate instrument, this instrument includes hilt portion, connecting portion and horn-shaped sharp blade, the both ends of connecting portion be connected with hilt portion and horn-shaped sharp blade respectively, horn-shaped sharp blade include neck and cutting edge portion, the upper end of neck be connected with connecting portion, the lower extreme of neck be 120 with cutting edge portion and 140 contained angles are connected, the cutting edge of cutting edge portion establish in the below, the front end of cutting edge portion establishes to round blunt form, has advantages such as simple structure, convenient to use, security height, operation risk reduction.

Description

Posterior longitudinal ligament separating and breaking tool used in total spine monoblock resection

Technical Field

The utility model belongs to the technical field of vertebra operation instrument technique and specifically relates to a posterior longitudinal ligament detacher for whole vertebra monoblock excision that simple structure, convenient to use, security are high, the operation risk reduces.

Background

It is well known that malignant spinal tumors are invasive and can erode surrounding bone and soft tissue, causing significant pain, pathological fractures, and neurological dysfunction. The current clinical treatment strategy for spinal tumors is surgical resection with adjuvant therapy. The total spine monobloc resection can effectively improve the overall survival rate and the tumor control rate of patients, becomes an effective mode for treating spinal tumors, and is gradually accepted and applied by extensive spinal surgeons. However, this is a technically demanding procedure requiring a great deal of experience and a thorough understanding of the local anatomy of the operator. The inventor finds in long-term clinical practice that the limitation of surgical instruments brings huge obstacles to the whole-block excision of the whole spine, and particularly, no special auxiliary tool is provided for the separation of the upper and lower posterior longitudinal ligaments adjacent to the diseased vertebra, thereby bringing huge difficulties and risks to the surgical operation.

Disclosure of Invention

The utility model aims at solving the defects of the prior art and providing a posterior longitudinal ligament separating and breaking tool for the whole spine resection with simple structure, convenient use, high safety and reduced operation risk.

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

the utility model provides a posterior longitudinal ligament breaks instrument in being used for whole block excision of vertebra entirely, this instrument includes hilt portion, connecting portion and horny sharp blade, the both ends of connecting portion be connected with hilt portion and horny sharp blade respectively, horny sharp blade include neck and sword portion, the upper end of neck be connected with the connecting portion, the lower extreme of neck be 120 with sword portion and 140 contained angles are connected, the cutting edge of sword portion establish in the below, the front end of sword portion establishes to be round blunt shape.

The included angle between the neck and the knife edge part of the utility model is 130 degrees.

The side of neck be equipped with the joint arch, the lower extreme of connecting portion be equipped with the inserting groove, be equipped with on the connecting portion of inserting groove side with the protruding complex joint hole of joint, the neck is connected with connecting portion through the protruding cooperation in joint hole and is connected, realizes the change of horn shape sharp blade.

The length of the knife handle of the utility model is 10-12cm, the length of the neck part is 1.2-1.8cm, and the length of the cutting edge of the blade part is 1.7-2.3 cm.

The lower extreme of connecting portion be equipped with the inserting groove, the upper end of inserting groove straightens handle portion, the handle portion of the upper end side of inserting groove is equipped with the slide opening of direction from top to bottom, the inserting groove in be equipped with the fixed cover of blade, the upper end of the fixed cover of blade be equipped with the slip arch, the bellied one end of sliding is connected with the fixed cover of blade, the bellied other end of sliding is stretched out by the slide opening of inserting groove side, the lower tip of the fixed cover of blade be equipped with lower extreme open-ended inflation strip hole, the neck of horn-shaped sharp blade stretch into in the fixed cover of blade again through the slip arch towards the top promote the neck that makes the fixed cover of blade and horn-shaped sharp blade take in the inserting groove together and lock tightly

The utility model has the advantages of simple structure, convenient use, high safety, reduced operation risk, etc. by adopting the structure.

Drawings

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

Fig. 2 is a schematic view of the structure of the tool shank of fig. 1.

Fig. 3 is a schematic view of the horn tip blade of fig. 1.

Fig. 4 is a schematic view of the structure of the middle-angle sharp blade of the present invention connected by the blade fixing sleeve.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

as shown in the attached drawings, the rear longitudinal ligament separating and breaking tool for the whole spondyle resection comprises a tool shank portion 1, a connecting portion 2 and a horn-shaped sharp blade, wherein two ends of the connecting portion 2 are respectively connected with the tool shank portion 1 and the horn-shaped sharp blade, the horn-shaped sharp blade comprises a neck portion 3 and a blade portion 4, the upper end of the neck portion 3 is connected with the connecting portion 2, the lower end of the neck portion 3 is connected with the blade portion 4 at an included angle of 120 degrees and 140 degrees, a blade of the blade portion 4 is arranged below, and the front end of the blade portion 4 is designed into a round blunt shape 7.

Furthermore, the included angle between the neck part 3 and the knife edge part 4 is 130 degrees.

Further, the side of neck 3 be equipped with joint arch 5, the lower extreme of connecting portion 2 be equipped with the inserting groove, be equipped with on the connecting portion 2 of inserting groove side with the protruding 5 complex joint holes 6 of joint, neck 3 is connected with connecting portion 2 through the protruding 5 cooperation in joint and joint hole 6, realizes the change of horn shape sharp blade.

Further, the length of the knife handle is 10-12cm, the length of the neck part 3 is 1.2-1.8cm, and the length of the blade part 4 is 1.7-2.3 cm.

Further, the lower extreme of connecting portion be equipped with the inserting groove, the upper end of inserting groove straightens handle portion 1, and handle portion 1 of the upper end side of inserting groove is equipped with the slide opening 8 of upper and lower direction, the inserting groove in be equipped with fixed cover 9 of blade, the upper end of the fixed cover 9 of blade be equipped with slip arch 10, the one end of slip arch 10 is connected with fixed cover 9 of blade, the other end of slip arch 10 is stretched out by the slide opening 8 of inserting groove side, the lower tip of the fixed cover 9 of blade be equipped with lower extreme open-ended inflation slotted hole 11, the neck of horn shape sharp blade stretch into in the fixed cover 9 of blade again through slip arch 10 upwards promote the neck that makes fixed cover 9 of blade and horn shape sharp blade retract the inserting groove together and lock.

The outer diameter of the neck of the horn-shaped sharp blade is slightly larger than the inner diameter of the blade fixing sleeve 9, the difference between the outer diameter and the inner strength is 1-2mm, the outer diameter of the lower end of the expanded blade fixing sleeve 9 is slightly larger than the inner diameter of the insertion groove, and the difference between the outer diameter and the inner diameter is 1-2mm, so that the neck of the horn-shaped sharp blade is easily inserted into the blade fixing sleeve 9, meanwhile, the neck of the horn-shaped sharp blade can be locked in the insertion groove when the blade fixing sleeve 9 is retracted, the horn-shaped sharp blade is connected, the horn-shaped sharp blade is prevented from being manually inserted into the insertion groove, and the blade edge of the horn-shaped sharp blade faces the hand during the insertion process of a person, so that the blade edge of the horn-shaped sharp blade can be prevented from hurting the hand, and potential safety hazards are avoided.

The utility model discloses when using, owing to be 120 between cutting edge portion 4 and the neck 3 and supplyes 140 degrees contained angles, this is a key place of design, and at the back longitudinal ligament abscission in-process, reduced the tractive to the dura mater sac, improved the area of contact of ventral cutting edge district and back longitudinal ligament, improved back longitudinal ligament abscission efficiency, shortened operation time. Meanwhile, the front end of the knife edge part 4 is designed into a round blunt shape 7, which is another key place of the design, so that the risk of damaging the front and back important tissue structures in the cutting process is avoided, in the whole spine resection, the conventional sharp knife is adopted to separate and break the posterior longitudinal ligament, and due to the limitation of the conventional sharp knife design, in the operation process, the dural sac is required to be drawn to a certain degree, so that the posterior longitudinal ligament can be fully exposed for cutting, and the risk of spinal cord injury is increased; secondly, the contact area of the conventional sharp knife and the posterior longitudinal ligament is limited, so that effective cutting cannot be performed, the operation time is prolonged, and the operation risk is increased; furthermore, the most distal end of the conventional sharp knife is in a sharp-pointed shape, so that the risk of damaging surrounding important tissue structures is increased in the process of cutting the posterior longitudinal ligament. In the operation of this kind of high difficulty of whole excision of vertebra entirely, the time is life promptly, consequently, the blunt design of the sword blade portion 4 and neck 3 in this patent be the angle and the cutting edge district distal end, can avoid the excessive tractive to the dura mater sac, has reduced spinal cord injury and important organizational structure damage risk on every side, can improve back longitudinal ligament cutting efficiency again, has shortened the operation time, has improved the operation success rate.

Claims

1. The utility model provides a posterior longitudinal ligament breaks instrument in being used for whole block excision of vertebra entirely, this instrument includes hilt portion, connecting portion and horny sharp blade, the both ends of connecting portion be connected with hilt portion and horny sharp blade respectively, horny sharp blade include neck and sword portion, the upper end of neck be connected with the connecting portion, the lower extreme of neck be 120 with sword portion and 140 contained angles are connected, the cutting edge of sword portion establish in the below, the front end of sword portion establishes to be round blunt shape.

2. The posterior longitudinal ligament severing tool of claim 1, wherein the angle between the neck and the blade portion is 130 °.

3. The tool according to claim 1, wherein the neck has a protrusion, the connecting portion has a slot, the connecting portion has a hole, and the neck is connected to the connecting portion via the protrusion and the hole.

4. The posterior longitudinal ligament separating tool for the total spine monobloc resection as claimed in claim 1, wherein the length of the handle is 10-12cm, the length of the neck is 1.2-1.8cm, and the length of the blade part is 1.7-2.3 cm.

5. The tool as claimed in claim 1, wherein the lower end of the connecting portion is provided with a slot, the upper end of the slot extends the handle portion, the handle portion on the side of the upper end of the slot is provided with a vertical sliding hole, the slot is provided with a blade fixing sleeve, the upper end of the blade fixing sleeve is provided with a sliding protrusion, one end of the sliding protrusion is connected with the blade fixing sleeve, the other end of the sliding protrusion extends out of the sliding hole on the side of the slot, the lower end of the blade fixing sleeve is provided with an expansion strip hole with an open lower end, and the neck of the horn-shaped sharp blade extends into the blade fixing sleeve and is pushed upwards by the sliding protrusion to enable the blade fixing sleeve and the neck of the horn-shaped sharp blade to be retracted into the slot and locked together.