CN219070537U

CN219070537U - Rotary cutter

Info

Publication number: CN219070537U
Application number: CN202222782424.0U
Authority: CN
Inventors: 张立; 喻青松; 姜帅
Original assignee: Peking University Third Hospital Peking University Third Clinical Medical College
Current assignee: Peking University Third Hospital Peking University Third Clinical Medical College
Priority date: 2022-10-21
Filing date: 2022-10-21
Publication date: 2023-05-26
Anticipated expiration: 2032-10-21

Abstract

The utility model discloses a rotary cutter which comprises a handle and a rod part which are connected with each other, wherein the front end of the rod part is connected with a working end. The working end is provided with at least one observation window, and the opening direction of the observation window comprises forward and upward; concave side edges are respectively arranged on two sides of the working end, and the side edges on two sides are provided with upward, thin and sharp scraping edges; the front end of the working end is provided with a blunt edge and a blunt end extending to two sides. The rotary cutter is a novel special under-the-lens treatment instrument for tissues such as ligamentum flavum and the like so as to realize rapid and complete excision of lesion and proliferation tissues, particularly has higher operation efficiency for the ligamentum flavum, correspondingly shortens operation time, reduces pain of patients and satisfies various treatment modes of the whole process of clinical spinal fusion operation.

Description

Rotary cutter

Technical Field

The utility model belongs to the field of medical instruments, and particularly relates to a novel rotary cutter for removing tissues such as ligamentum flavum and the like in a spinal endoscope fusion operation.

Background

With the rapid development of endoscope technology, the development of spinal surgery indication treatment by means of an endoscope has been further popularized and applied. Under the background of the aggravated aging of population, the incidence rate of spinal diseases such as herniated disk, hyperosteogeny, yellow ligament hypertrophy and the like is greatly increased. The prior art can only implement open surgery, the damage to muscle, fascia and bone tissues of a patient is serious, and the postoperative rehabilitation time of the patient is long, so that medical resources are excessively occupied. Therefore, minimally invasive surgery is extremely affordable to doctors and patients.

In the minimally invasive fusion operation process, no special tool for cutting tissues such as ligamentum flavum is available, other instruments are adopted, the efficiency is low, the risk of damaging the nerve dura is quite high, the operation process is complicated, a great amount of time is wasted, and the pain of a patient is obvious.

Disclosure of Invention

The object of the present utility model is to provide a rotary cutter which solves one or more of the above mentioned problems of the prior art.

According to an aspect of the present utility model, there is provided a rotary cutter including a handle and a lever portion connected to each other, a working end being connected to a front end of the lever portion; the working end is provided with at least one observation window, and the opening direction of the observation window comprises forward and upward; concave side edges are respectively arranged on two sides of the working end, and each side edge is provided with a thin and sharp scraping edge; the front end of the working end is provided with a blunt edge and a blunt end extending to two sides. The rotary cutter can realize rapid and complete excision of pathological change and proliferation tissues, has higher operation efficiency particularly for the ligamentum flavum, correspondingly shortens operation time and reduces pain of patients, and meets various treatment modes of the whole process of clinical spinal fusion operation.

In some embodiments, the handle of the present utility model has an implantation aperture for allowing the passage of a spinal endoscope, and the stem has a generally cylindrical cavity for receiving the body of the spinal endoscope; the implantation hole is communicated with the cylindrical cavity.

In some embodiments, the handle of the present utility model has an implant hole that allows the passage of a spinal endoscope; the rod part is provided with a half cavity which is cut along the longitudinal direction and is used for accommodating the through length of the backbone endoscope body, and the implantation hole of the handle is communicated with the half cavity of the rod part.

In some embodiments, the handle of the present utility model is provided with a dial at least on one side outer edge.

In some embodiments, both the blunt edge and the blunt end of the present utility model are arcuate.

In some embodiments, the working end and the rod part of the utility model are of an eccentric connecting structure, and the axial center line of the working end and the rod part is not coincident.

In some embodiments, the working end of the present utility model has two concave sides, with two concave sides and an upper concave side connected between the sides and the stem.

In some embodiments, the stem of the present utility model is inserted into the handle from front to back for a reverse-insertion secure connection.

In summary, the rotary cutting tool provided by the application has the following advantages:

1. the minimally invasive, visual and safe surgical requirements of clinical requirements are met, the minimally invasive surgical instrument has higher applicability and extensive compatibility of the endoscopic fusion surgery, the surgical efficiency is obviously improved and the time is shortened on the whole, and the stimulation to the nerve and dura mater in the vertebral canal of a patient and the pain of the patient are reduced.

2. By using the surgical operation device, a doctor can accurately guide the end plate device into an operation position by matching the surgical operation device with the spinal endoscope and various working sleeves, and the pathological tissues are efficiently and rapidly resected by rotating the handle to drive the scraping edge, so that the operation efficiency is remarkably improved.

3. This application has eccentric formula work end, can increase after the rotation and strike off the scope and improve and scrape the cutting strength, scrape and cut the operation and be accurate fast, reinforcing work end mechanical strength and increase of service life simultaneously can reduce patient's wound's size effectively, alleviates patient's painful sense and is favorable to the postoperative to resume.

4. The handle with the reverse insertion type has the advantages that the efficiency of combined use of various instruments is correspondingly improved, and the cost for developing operations and the burden of patients can be effectively reduced.

5. The surgical operation method and the surgical operation device are flexibly combined with the endoscope, can simplify the operation flow of doctors, are more suitable for clinical use and popularization of the existing spinal fusion surgery, and can be also expanded to other endoscopic surgeries for use.

Drawings

FIG. 1 is a schematic view showing the structure of a rotary cutter according to embodiment 1;

FIG. 2 is a schematic view of the working end structure of embodiment 1;

FIGS. 3-1 and 3-2 are schematic views showing a procedure using the rotary cutter of example 1;

FIG. 4 is a schematic view of the shank and working end of the rotary cutter of example 2;

FIG. 5 is a schematic view of the working end structure of embodiment 2;

FIG. 6 is a schematic view of a surgical procedure using the rotary cutter of example 2;

fig. 7 is a schematic view showing the structure of the rotary cutter according to embodiment 3.

Detailed Description

The present utility model is further illustrated by the following examples, but the scope of protection is not limited by these examples. Additional advantages and features of the present application can be derived from the following description, in which embodiments are set forth in detail with reference to the figures.

Fig. 1-2 schematically show the structure of a rotary cutter according to an embodiment of the present utility model.

Example 1, referring to fig. 1 to 2, the present application proposes an extra-corporal rotary cutter for resecting a ligamentum flavum in a spinal endoscopic fusion surgery, which includes a handle 1 and a rod 2 connected to each other, the handle 1 and the rod 2 being fixedly connected by welding.

Wherein the handle 1 has an implantation hole allowing the spinal endoscope 10 to pass through.

The rod part 2 is provided with a half cavity 21 which is cut along the longitudinal direction and is used for accommodating the through length of the endoscope body of the spinal endoscope 10, and the implantation hole of the handle 1 is communicated with the half cavity 21 of the rod part 2.

At the front end of the shaft 2, a working end 3 is provided, the working end 3 having at least one observation window 30, the opening direction of the observation window 30 including forward and upward.

The handle 1 is provided with a shifting block 11 at least at one side outer edge, and the shifting block 11 and the handle 1 body are processed into an integrated structure through stamping forming. By pulling the pulling block 11 by hand, the handle 1 can be conveniently rotated, and the handle 1 drives the rod part 2 to integrally rotate, so that the direction and angle of the observation window 30 of the working end 3 can be changed.

Both sides of the working end 3 are respectively provided with concave side edges, the side edges of both sides are respectively provided with an upward, thin and sharp scraping edge 31, and when the working end 3 rotates, the scraping edges 31 of both sides can simultaneously carry out circular cutting and scraping on pathological tissues such as ligamentum flavum along a circumferential track.

At the front end of the working end 3 are provided a blunt edge 32 and a bilaterally extending, arcuate blunt edge 33.

Therefore, in the process of extending the extra-specular rotary cutter into the intervertebral disc of the patient, the working end 3 is always in contact with each tissue of the intervertebral space, namely, the side edge, the blunt edge 32 and the arc-shaped blunt end 33 are all in contact with the blunt part, so that the working end 3 is ensured to protect the sensitive nerve dura mater in the implantation process. Only when rotating, the scraping edge 31 can contact the surface of the ligamentum flavum, has the cutting effect and the scraping function, and can rapidly cut and proliferate the tissues such as the thickened ligamentum flavum, and the like.

Fig. 3 schematically shows a use state of the rotary cutter shown in fig. 1.

Referring to fig. 3-1 and 3-2, using the exoscopic rotary cutter of the present embodiment, the spinal endoscope 10 is implanted from the implantation hole of the handle 1 into the half cavity 21 of the shaft portion 2, with the lens at the viewing window 30 of the working end 3.

In a direct view, the handle 1 is rotated to rotate the scraping edges 31 on both sides of the working end 3 in the circumferential direction, thereby cutting off the proliferated ligamentum flavum ring.

In the case of taking out the spinal endoscope 10, reserving the extra-specular rotary blade, other instruments such as forceps are used to extend into the half-cavity 21 of the shaft 2 to take out the cut ligament tissue, and the entire surgical procedure is efficient and safe.

Fig. 4 to 5 schematically show the structure of a rotary cutter according to another embodiment of the present utility model.

Embodiment 2, referring to fig. 4 to 5, the application provides an under-the-lens rotary cutter for removing a yellow ligament in a spinal endoscope fusion surgery, the under-lens rotary cutter comprises a handle 1 and a rod part 2 which are connected with each other, the rod part 2 is inserted into the handle 1 from front to back for reverse insertion type fixed connection, and a working end 3 is arranged at the front end of the rod part 2.

Unlike example 1, the shaft 2 is of a solid construction of full length, with a diameter significantly smaller than the handle 1 to minimize surgical trauma.

The working end 3 arranged at the front end of the rod part 2 is used for being matched with the spine endoscope 10 and the working sleeve 20 for accommodating the spine endoscope 10 to rapidly and effectively scrape off the ligamentum flavum which proliferates in the intervertebral space.

The working end 3 is provided with two concave side edges 34, the side edges 34 are provided with upward thin sharp scraping edges 31, and when the working end 3 rotates, the scraping edges 31 at the two sides can simultaneously cut and scrape pathological tissues such as ligamentum flavum along a circumferential track.

At the front end of the working end 3 are provided a blunt edge 32 and a bilaterally extending, arcuate blunt edge 33. The working end 3 always contacts with each tissue of the intervertebral space in the process of extending the rotary cutter under the lens into the intervertebral disc in the patient, namely the side edge 34, the blunt edge 32 and the arc blunt end 33 are all in blunt contact, so that the working end 3 is ensured to protect the sensitive nerve dura mater in the implantation process.

Unlike embodiment 1, the working end 3 and the rod 2 are of an eccentric connection structure, i.e. the axial center lines of the working end 3 and the rod 2 do not coincide, and the purpose of the structural improvement here is to increase the cutting angle and area of the scraping edge 31 when rotating, and the flared scraping edge 31 has a larger processing range and higher circumferential shearing force when rotating, so that the operation efficiency is higher.

Preferably, the axial center line of the working end 3 is lower than the axial center line of the shaft 2, so that the working end 3 is located vertically downward with respect to the shaft 2, which is advantageous for a doctor to grasp the center of gravity of the exertion to improve the accuracy of the scraping operation.

Further, two side concave surfaces 35 and an upper concave surface 36 are connected between the side edge 34 and the lever portion 2 to correspondingly reduce the overall weight of the working end 3 and the volume of the non-circular cut portion (relative to the scraping edge 31).

Fig. 6 schematically shows a use state of the rotary cutter shown in fig. 4.

Referring to fig. 6, in operation, the under-the-lens rotary cutter is implanted in the body of the spinal endoscope 10, and both are inserted together and accommodated in the working sleeve 20.

The doctor only needs to rotate the handle 1 to scrape the ligamentum flavum growing in the intervertebral disc by the scraping edges 31 at the two sides of the working end 3; after scraping, the under-the-lens rotary cutter is removed together with the spinal endoscope 10, leaving the working cannula 20, and finally, other instruments such as forceps are placed in order to remove the ring-cut tissue for rapid cleaning.

Fig. 7 schematically shows the structure of a rotary cutter according to still another embodiment of the present utility model.

Example 3, referring to fig. 7, differs from example 1 in that the stem portion 2 is a tubular cavity of a general length.

The foregoing are merely some embodiments of the utility model. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the utility model.

Claims

1. Rotary cutter, its characterized in that: the device comprises a handle and a rod part which are connected with each other, wherein the front end of the rod part is connected with a working end, the working end is provided with at least one observation window, and the opening direction of the observation window comprises forward and upward directions;

concave side edges are respectively arranged on two sides of the working end, and each side edge is provided with a thin and sharp scraping edge;

the front end of the working end is provided with a blunt edge and a blunt end extending to two sides.

2. A rotary cutter as defined in claim 1, wherein: the handle is provided with an implantation hole for allowing the spinal endoscope to pass through, and the rod part is provided with a tubular cavity with a through length for accommodating the endoscope body of the spinal endoscope; the implantation hole is communicated with the cylindrical cavity.

3. A rotary cutter as defined in claim 1, wherein: the handle has an implantation hole for allowing the spinal endoscope to pass through;

the rod part is provided with a half cavity which is cut along the longitudinal direction and is used for accommodating the through length of the backbone endoscope body, and the implantation hole of the handle is communicated with the half cavity of the rod part.

4. A rotary cutter according to any one of claims 1 to 3, wherein: the handle is provided with a shifting block at the outer edge of at least one side.

5. A rotary cutter according to any one of claims 1 to 3, wherein: the blunt edge and the blunt tip are arc-shaped.

6. A rotary cutter as defined in claim 1, wherein: the working end and the rod part are of an eccentric connecting structure, and the axial center lines of the working end and the rod part are not coincident.

7. A rotary cutter as defined in claim 6, wherein: the working end is provided with side edges with concave sides, and two side concave surfaces and an upper concave surface are connected between the side edges and the rod part.

8. The rotary cutting blade according to claim 6 or 7, wherein: the rod part is inserted into the handle from front to back for reverse insertion type fixed connection.