Handheld rotary cutter for breast vacuum rotary cutting system
By designing a bilayer tubular structure rotary incision needle, the problem of fixing the slot length and vulnerability to tissue in the breast vacuum rotary incision system is solved, and flexible tissue resection and breast tissue protection are achieved.
Patent Information
- Application Number
- CN202420874682.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-25
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-04-25
AI Technical Summary
The hand-held rotary cutter of the existing breast vacuum rotary cutting system is fixed when removing the bulk tissue, which may lead to the removal of normal tissue, and the sharp notch is likely to damage the breast tissue.
A double-layer tubular structure rotary cutting needle is designed, including a hollow inner needle and an outer sleeve, which can be positioned to expose notches of the expected length and completely block the notches in normal conditions to avoid Tissue injury.
By adjusting the position of the outer cannula, a specific length of mass tissue is achieved, avoiding the risk of resection of normal tissue and protecting breast tissue when inserting or withdrawing the rotary incision needle.
Smart Images
Figure CN222467044U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of medical equipment, and in particular relates to a handheld rotary cutting knife used in a breast vacuum rotary cutting system. Background Art
[0002] The breast vacuum excision system is a minimally invasive treatment and biopsy system for breast masses (lumps, tumors). It is carried out through a small puncture needle hole under the guidance of ultrasound stereotactic positioning to remove breast tumors. The handheld excision knife is one of the important components of the breast vacuum excision system.
[0003] The structure of a handheld rotary cutting knife generally consists of a handle and a vacuum rotary cutting needle. The vacuum rotary cutting needle is in the shape of a needle tube with a notch near the front end. The handle is connected to a negative pressure source. The edge of the notch is a knife edge, and the connecting part between the front end of the handle and the vacuum rotary cutting needle is a transition cavity. During normal use, the breast is punctured first, and then the rotary cutting needle is inserted into the puncture hole until the notch reaches the position of the mass tissue to be removed. The mass tissue is tightly adsorbed to the notch by negative pressure, and the notch is rotated to remove the mass tissue. The mass tissue will be adsorbed into the transition cavity along the inner cavity of the rotary cutting needle through negative pressure. The mass tissue can be removed by opening the transition cavity. Continuous resection operations can be performed.
[0004] The notch on the rotary cutting needle of the current rotary cutting knife is relatively long and fixed in length, so the length of the mass tissue removed each time is the same. However, in some cases, the diseased mass tissue may be small, and normal tissue will inevitably be removed. On the other hand, since the notch is always open and the edge of the notch is used as the cutting edge, the notch is very sharp, and the notch may injure normal breast tissue during the insertion or withdrawal of the rotary cutting needle. Utility Model Content
[0005] In view of the above problems, the purpose of the present utility model is to provide a handheld peeling knife for a breast vacuum peeling system, aiming to solve the above technical problems.
[0006] The utility model adopts the following technical solutions:
[0007] The handheld rotary cutter of the breast vacuum rotary cutting system includes a handle and a rotary cutting needle, the handle is connected to a negative pressure tube, the rotary cutting needle includes a hollow inner needle and an outer sleeve, the front end of the inner needle is a pointed tip, the front part of the inner needle is divided into a notch, the front end of the outer sleeve is formed with a matching arc-shaped opening at a position corresponding to the notch, the notch and the arc-shaped opening are both knife edges, and the handheld rotary cutter also includes an adjustment mechanism for adjusting the position of the outer sleeve.
[0008] Furthermore, the adjustment mechanism includes a fixed sleeve located at the front end of the handle, the tail end of the inner needle is fixed to the fixed sleeve, the rear part of the inner needle is also covered with a compression spring, and the tail end of the outer sleeve is integrally formed with a retaining ring, the retaining ring is located in front of the compression spring, and a guide groove is also opened on the fixed sleeve, and a threaded short column passing through the guide groove is provided on the retaining ring, and a threaded tight sleeve is screwed on the threaded short column.
[0009] Furthermore, a protruding layer matching the shape of the arc-shaped opening is formed on the rear side of the tip of the inner needle.
[0010] Furthermore, the edge of the protruding layer is blunt
[0011] The beneficial effects of the utility model are as follows: the rotary cutting needle of the structure is a double-layer tubular structure. Under normal conditions, the outer sleeve will completely cover the notch, and the rotary cutting needle will not damage the tissue during the insertion or withdrawal of the breast; in addition, when it is necessary to remove tissue, the position of the outer sleeve is adjusted to expose the notch of the expected length, so that the mass tissue of a specific length can be removed, and the removal of normal tissue can be avoided. The product has a simple structure and good use effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a three-dimensional diagram of a handheld rotary cutter provided by an embodiment of the utility model;
[0013] Figure 2 This is a partial enlarged view of the front position of the rotary cutting needle;
[0014] Figure 3 This is a partial enlarged view of the connection between the rotary cutting needle and the handle;
[0015] Figure 4 This is a diagram of the middle structure of a rotary cutting needle. DETAILED DESCRIPTION
[0016] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0017] In order to illustrate the technical solution of the present invention, specific embodiments are provided below for illustration.
[0018] like Figure 1-3As shown, the handheld peeling knife of the breast vacuum peeling system provided in this embodiment includes a handle 1 and a peeling needle 2, and the handle 1 is connected to a negative pressure tube 3. The peeling needle 2 includes a hollow inner needle 21 and an outer sleeve 22. The front end of the inner needle 21 is a pointed tip, and the front part of the inner needle 21 is divided into a notch 23, and the front end of the outer sleeve 22 is formed with a matching arc-shaped opening 24 at a position corresponding to the notch. The notch 23 and the arc-shaped opening 24 are both knife edges, and the handheld peeling knife also includes an adjustment mechanism for adjusting the position of the outer sleeve.
[0019] In this structure, before use, the outer sleeve is pushed forward by the adjustment mechanism until the notch is completely covered. During surgery, after breast puncture, the rotary cutting needle is inserted into the puncture hole. During the insertion process, since the notch is not exposed, the notch will not cause damage to the breast tissue. Then the outer sleeve is retracted, and the notch opening can be adjusted by distance control without exposing the entire notch. Therefore, the notch can be adjusted according to the size of the mass tissue to be removed from the breast to avoid removing normal tissue during removal.
[0020] As a specific adjustment method, the adjustment mechanism includes a fixed sleeve 11 located at the front end of the handle 1, the tail end of the inner needle 21 is fixed to the fixed sleeve 11, the rear part of the inner needle 21 is also covered with a compression spring 28, and the tail end of the outer sleeve 22 is integrally formed with a retaining ring 25, and the retaining ring 25 is located in front of the compression spring 28. A guide groove 12 is also opened on the fixed sleeve 11, and a threaded short column passing through the guide groove 12 is provided on the retaining ring 5, and a threaded tight sleeve 26 is screwed on the threaded short column.
[0021] The tail end of the inner needle is fixed in the fixed sleeve, and the outer sleeve is installed outside the inner needle in a forward and backward sliding manner. The threaded short column acts as a limit in the guide groove, so that the outer sleeve and the inner needle will not deflect relative to each other. In addition, a guide structure can be further provided between the outer sleeve and the inner needle to ensure movement limitation. For example, Figure 4 As shown, there is a strip groove in the middle of the outer sleeve, and a sliding plate is provided on the surface of the inner needle. The sliding plate is located in the strip groove, which can play a guiding role and an anti-deflection role.
[0022] Under normal conditions, under the force of the compression spring, the outer sleeve moves to the frontmost position. After being inserted into the puncture hole, the position of the outer sleeve is adjusted backwards, and the threaded sleeve is tightened to fix the outer sleeve. This adjustment method is simple and convenient. After the notch is adjusted, the mass tissue is adsorbed in the notch by negative pressure, and then the handle is turned to remove the mass tissue. Under the force of negative pressure, the cut tissue is sucked into the transition cavity 13, and the transition cavity is opened to be taken out.
[0023] Finally, if Figure 2As shown, a protruding layer 21 matching the shape of the arc-shaped opening 24 is formed at the rear side of the tip of the inner needle 21, and the edge of the protruding layer 21 is blunt. When inserting the rotary cutting needle, the edge of the protruding layer cooperates with the arc-shaped opening to prevent the arc-shaped opening from injuring the tissue. After the mass tissue is removed, the threaded sleeve is loosened, and the outer sleeve is advanced to cooperate with the protruding layer, which facilitates the removal of the rotary cutting needle without injuring the tissue.
[0024] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A handheld veneer for a breast vacuum veneer system, comprising a handle and a veneer needle, wherein the handle is connected to a negative pressure tube, characterized in that: The rotary cutting needle includes a hollow inner needle and an outer sleeve. The front end of the inner needle is a pointed tip. The front part of the inner needle is divided into a notch. The front end of the outer sleeve is formed with a matching arc-shaped opening at a position corresponding to the notch. The notch and the arc-shaped opening are both knife edges. The handheld rotary cutting knife also includes an adjustment mechanism for adjusting the position of the outer sleeve.
2. The handheld peeling knife for breast vacuum peeling system according to claim 1, characterized in that: The adjustment mechanism includes a fixed sleeve located at the front end of the handle, the tail end of the inner needle is fixed in the fixed sleeve, the rear part of the inner needle is also covered with a compression spring, and the tail end of the outer sleeve is integrally formed with a retaining ring, the retaining ring is located in front of the compression spring, and a guide groove is also opened on the fixed sleeve, and a threaded short column passing through the guide groove is provided on the retaining ring, and a threaded tight sleeve is screwed on the threaded short column.
3. The handheld peeling knife for breast vacuum peeling system according to claim 2, characterized in that: A protruding layer matching the shape of the arc-shaped opening is formed on the rear side of the tip of the inner needle.
4. The handheld peeling knife for breast vacuum peeling system according to claim 3, characterized in that: The edge of the protruding layer is blunt.