Rotary cutting needle body and rotary cutting needle device

Abstract

Provided in the present invention are a rotary cutting needle body and a rotary cutting needle device, capable of improving the clarity of development in the operation of removing, by means of a rotary cutting needle, tissue, and helping a doctor accurately determine the condition of a target tissue. The rotary cutting needle body comprises a hollow inner needle and an outer needle having a cutting groove at the distal end, and further comprises an ultrasonic probe. In addition, the ultrasonic probe is located inside the inner needle. The ultrasonic probe is in the shape of an elongated strip, and an ultrasonic generator at the distal end thereof is located at the position of the cutting groove. The rotary cutting needle device comprises a rotary cutting needle handle and a collection box, and further comprises the rotary cutting needle body of the present invention. The distal end of the rotary cutting needle device is the distal end of the outer needle, and the proximal end of the rotary cutting needle device is the collection box.

Description

Rotary cutting needle body and rotary cutting needle equipment Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a rotary cutting needle body and a rotary cutting needle device. Background Technology

[0002] A rotary biopsy needle device, also known as a rotary biopsy needle, consists of a handle and a collection box, with the needle body extending from the distal end of the handle. The needle body comprises a coaxial inner and outer needle. The outer needle has an opening near its tip, called a cutting groove. The distal end of the inner needle has a sharp cutting edge. If the tip of the inner needle is moved distally as close as possible to the tip of the outer needle, the inner needle blocks the cutting groove. If the inner needle is retracted a certain distance, the cutting groove becomes open.

[0003] During use, the outer and inner needles are inserted into the tissue together. After insertion, if the groove is open, negative pressure is generated by the rotary cutting needle handle to draw part of the tissue into the groove. Then, the inner needle is pushed forward to cut the tissue from the whole tissue. The cut tissue is then drawn into the collection box by negative pressure for further analysis.

[0004] The rotary cutting needle device can be used in conjunction with imaging techniques such as ultrasound and mammography for the detection and treatment of breast diseases. Compared with other surgical methods, it has the advantages of being minimally invasive and allowing for large sample volumes.

[0005] Compared to other imaging methods, ultrasound imaging offers advantages in terms of flexibility and ease of operation, making it the most commonly used imaging method in excision surgery. However, during breast tumor resection, the cavity left after tissue removal can obstruct ultrasound transmission, leading to unclear ultrasound imaging and making it difficult for surgeons to determine whether the tumor tissue has been completely removed. Summary of the Invention

[0006] In view of this, the present invention proposes a rotary cutting needle body and a rotary cutting needle device, which can improve the imaging clarity during surgery where the rotary cutting needle removes tissue, helping doctors to accurately determine the condition of the target tissue. The present invention proposes the following technical solution:

[0007] A rotary cutting needle body includes a hollow inner needle and an outer needle with a cutting groove at its distal end. The rotary cutting needle body also includes an ultrasonic probe, wherein: the ultrasonic probe is located inside the inner needle; the ultrasonic probe is elongated, and an ultrasonic generator at its distal end is located at the cutting groove.

[0008] Optionally, the ultrasonic probe is also equipped with a pulse generator.

[0009] A rotary cutting needle device includes a rotary cutting needle handle and a collection box. The cutting needle device also includes the rotary cutting needle body described in this invention. The distal end of the rotary cutting needle device is the distal end of the outer needle, and the proximal end of the rotary cutting needle device is the collection box.

[0010] Optionally, the ultrasonic probe passes through the collection box and the rotary cutting needle handle.

[0011] Optionally, it also includes a plug that is connected to the proximal end of the collection box, and the ultrasonic probe passes through the plug.

[0012] Optionally, the ultrasonic probe is fixedly connected to the plug; the plug is fixedly connected to the proximal end of the collection box.

[0013] Optionally, the inner wall of the near end of the collection box is provided with a plurality of protrusions, and a locking groove is formed between adjacent protrusions; the outer surface of the far end of the plug is provided with a plurality of locking blocks distributed circumferentially along the plug; during the process of the plug being inserted into the near end of the collection box, the locking block enters from the near end of the locking groove and moves to the far end of the locking groove; after the locking block moves out of the locking groove from the far end of the locking groove, in the case of relative rotation between the collection box and the plug about the axis of the plug, the locking block can reach the far end of the protrusion.

[0014] Optionally, the plurality of protrusions are of the same length; the plug is further provided with a plurality of locking ribs distributed along the circumference of the plug, each locking rib being aligned with a locking block on the circumference of the outer surface of the plug; each locking rib and its aligned locking block have a uniform spacing, which is equal to the length of the plurality of protrusions.

[0015] According to the technical solution of the present invention, the ultrasound probe is integrated into the rotary cutting needle device, which enables ultrasound examination from inside the body. By detecting the ultrasound at close range, the influence of the cavity position after resection can be avoided, the imaging clarity can be improved, and the surgery can be assisted to the greatest extent. Attached Figure Description

[0016] For illustrative and not limiting purposes, the invention will now be described with reference to preferred embodiments thereof, particularly the accompanying drawings, in which:

[0017] Figure 1 is a schematic diagram of the external appearance of the rotary cutting needle device in an embodiment of the present invention;

[0018] Figure 2A is a schematic diagram of the external shape of the rotary cutting needle body in an embodiment of the present invention;

[0019] Figure 2B is a partially enlarged schematic diagram of the NN cross section of Figure 2A;

[0020] Figure 2C is a schematic diagram of the external shape of the ultrasonic probe in an embodiment of the present invention;

[0021] Figure 3 is a schematic diagram of the ultrasonic probe passing through the plug according to an embodiment of the present invention;

[0022] Figure 4 is a schematic diagram of the connection structure between the plug and the collection box according to an embodiment of the present invention;

[0023] Figure 5 is a schematic diagram of the steps of using the rotary cutting needle device according to an embodiment of the present invention.

[0024] Among them: 100, rotary cutting needle device; 10, rotary cutting needle body; 11, outer needle; 111, cutting groove; 12, rotary cutting needle handle; 13, collection box; 131, proximal end of collection box; 1311, protrusion; 1312, locking groove; 1321, locking block; 1322, locking rib; 132, plug; 14, inner needle; 141, inner needle cutting edge; 2, ultrasonic probe; 21, ultrasonic generator; 22, wire. Detailed Implementation

[0025] The technical solution of the embodiments of the present invention will be described below with reference to the accompanying drawings. The terms "far end" and "proximal end" are based on the user of the rotary cutting needle device; therefore, the direction of the needle tip is far, and the opposite direction is near. Taking Figure 1 as an example, from the perspective of the figure, the upper left is the far end, and the lower right is the proximal end. Figure 1 is a schematic diagram of the external shape of the rotary cutting needle device in the embodiment of the present invention. As shown in Figure 1, the rotary cutting needle device 100 has an outer needle 11 (with a coaxial inner needle inside, not visible in the figure), a rotary cutting needle handle 12, a collection box 13, and a plug 132 connected to the proximal end 131 of the collection box. The plug 132 is a rotating body, that is, its cross-section is circular, and the axis of rotation is a through hole. In the embodiment of the present invention, it is proposed to integrate an ultrasonic device into the rotary cutting needle device. Specifically, an ultrasonic probe 2 with a wire 22 can be passed through the collection box 13 and the rotary cutting needle handle 12, and placed inside the inner needle 14. The distal end of the ultrasonic probe 2 has an ultrasonic generator 21. The figure shows the ultrasonic generator 21 protruding from the groove 111 of the outer needle 11, which can be an existing miniature high-frequency ultrasonic probe or a miniature high-frequency ultrasonic transducer.

[0026] Figure 2A is a schematic diagram of the external shape of the rotary cutting needle body in an embodiment of the present invention, and Figure 2B is a partially enlarged schematic diagram of the NN cross section of Figure 2A. Figure 2C is a schematic diagram of the external shape of the ultrasonic probe in an embodiment of the present invention. As shown in Figures 2A, 2B, and 2C, the rotary cutting needle body 10 has an outer needle 11, an inner needle 14 located within the outer needle 11, an ultrasonic probe 2 located within the inner needle 14, and an ultrasonic generator 21 located at the distal end of the ultrasonic probe 2. When the inner needle 14 is pulled down so that the inner needle cutting edge 141 is located near the proximal end of the cutting groove 111, the ultrasonic generator 21 is exposed from the cutting groove 111.

[0027] When assembling the rotary cutting needle device 100, the plug 132 and the collection box 13 are initially separated. At this time, the ultrasonic probe 2 is passed through the hole in the center of the plug 132, as shown in Figure 3. Figure 3 is a schematic diagram of the state of the ultrasonic probe passing through the plug according to an embodiment of the present invention. Then, the ultrasonic probe 2 is inserted from the proximal end 131 of the collection box and into the inner needle 14, finally forming the state shown in Figure 1. At this time, the plug 132 and the proximal end 131 of the collection box are fixedly connected, so that the ultrasonic generator 21 remains located at the cutting groove 111.

[0028] The plug 132 and the proximal end 131 of the collection box can be connected by locking grooves and locking blocks. Figure 4 is a schematic diagram of the connection structure between the plug and the collection box according to an embodiment of the present invention. As shown in Figure 4, the proximal end 131 of the collection box (shown as a partially cut-off portion in the figure) is provided with multiple protrusions 1311 (shown as a complete protrusion 1311 in the figure), and multiple locking grooves 1312 are formed between the multiple protrusions 1311. The outer surface of the distal end of the plug 132 is provided with multiple locking blocks 1321, and the middle part is provided with multiple locking ribs 1322. Each locking block 1321 and each locking rib 1322 are aligned in the circumferential direction of the plug 132, as shown in the figure. The distance between each locking block 1321 and the aligned locking rib 1322 is the same, which is the length of the protrusion 1311, that is, the distance from the distal end of the protrusion 1311 to the proximal end of the protrusion 1311.

[0029] When the plug 132 is connected to the proximal end 131 of the collection box, the locking block 1321 enters from the proximal end of the locking groove 1312 and then comes out from the distal end. At this time, the plug 132 is turned so that it rotates along its own axis, and the locking block 1321 moves to the distal end of the protrusion 1311. That is to say, the protrusion 1311 is stuck between the locking block 1321 and the locking rib 1322, thereby fixing the plug 132 to the proximal end 131 of the collection box.

[0030] When using the rotary cutting needle device 100 in this embodiment of the invention, tissue can first be aspirated in a conventional manner, and then internal ultrasound examination can be performed, as shown in Figure 5. Figure 5 is a schematic diagram of the steps of using the rotary cutting needle device in this embodiment of the invention.

[0031] Step 51: Perform rotary cutting. In this step, the ultrasound probe is not yet installed in the inner needle 14. At this time, following the standard procedure and referring to the ultrasound image, insert the rotary cutting needle, i.e., the inner needle 14 and the outer needle 11, into the target location on the human body. Pull the inner needle 14 back proximally to open the cutting groove. Use negative pressure to draw the tissue from the cutting groove 111. Push the inner needle 14 forward distally. The inner needle blade 141 cuts off the tissue that has entered the cutting groove 111, and uses negative pressure to draw the tissue into the collection box 13.

[0032] Step 52: Tissue Removal. In this step, the plug 132 of the collection box 13 is opened, and the tissue is removed from the collection box 13. Steps 51 and 52 above are standard operations, which can also be performed by existing rotary cutting needle devices. The following steps will utilize the new functions of the rotary cutting needle device 100 in this embodiment.

[0033] Step 53: Install the ultrasonic probe. In this step, first connect the ultrasonic probe 2 to the plug 132, forming the state shown in Figure 3. Then, insert the ultrasonic probe 2 from the proximal end of the collection box 13 until the ultrasonic generator 21 reaches the distal end of the inner needle 14, and move the inner needle 14 so that the ultrasonic generator 21 protrudes from the groove 111. At this time, the inner needle 14 and the outer needle 11 are still inserted in the target position.

[0034] Step 54: Internal ultrasound examination. Because the ultrasound probe 2 is connected to the display system via wires, and the ultrasound generator 21 is located at the target position, a clear ultrasound image of the target position can be obtained, helping the doctor determine whether further excision is necessary.

[0035] According to the technical solution of this invention, integrating an ultrasound probe into a rotary cutting needle device enables ultrasound examination from within the body. Close-range ultrasound detection avoids the influence of the cavity location after resection, improves imaging clarity, and maximizes surgical assistance. Generally, higher ultrasound frequencies result in higher imaging clarity; however, high-frequency ultrasound has poor penetration and can only be used to examine the skin or tissues close to the skin. Placing the ultrasound probe at the surgical site within the body allows for the selection of higher-frequency ultrasound, thereby obtaining clearer ultrasound images.

[0036] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can occur depending on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A rotary cutting needle body, comprising a hollow inner needle and an outer needle with a cutting groove at its distal end, characterized in that, The rotary cutting needle body also includes an ultrasonic probe, and: The ultrasonic probe is located inside the inner needle; The ultrasonic probe is elongated, with the ultrasonic generator at its distal end located at the groove.

2. The rotary cutting needle body according to claim 1, characterized in that, The ultrasonic probe is also equipped with a pulse generator.

3. A rotary cutting needle device, comprising a rotary cutting needle handle and a collection box, characterized in that, The cutting needle device further includes the rotary cutting needle body as described in claim 1 or 2; The distal end of the rotary cutting needle device is the distal end of the outer needle, and the proximal end of the rotary cutting needle device is the collection box.

4. The rotary cutting needle device according to claim 3, characterized in that, The ultrasonic probe passes through the collection box and the handle of the rotary cutting needle.

5. The rotary cutting needle device according to claim 4, characterized in that, It also includes a plug that is connected to the proximal end of the collection box, and the ultrasonic probe passes through the plug.

6. The rotary cutting needle device according to claim 5, characterized in that, The ultrasonic probe is fixedly connected to the plug; The plug is fixedly connected to the proximal end of the collection box.

7. The rotary cutting needle device according to claim 6, characterized in that, The inner wall near the collection box is provided with multiple protrusions, and a locking groove is formed between adjacent protrusions; The outer surface of the distal end of the plug is provided with multiple locking blocks distributed circumferentially along the plug. During the insertion of the plug into the proximal end of the collection box, the locking block enters from the proximal end of the locking groove and moves towards the distal end of the locking groove; After the locking block moves out of the locking groove from the far end of the locking groove, the locking block can reach the far end of the protrusion when there is relative rotation between the collection box and the plug about the axis of the plug.

8. The rotary cutting needle device according to claim 7, characterized in that, The multiple bumps are of the same length; The plug is also provided with a plurality of locking ribs distributed along the circumference of the plug. Each locking rib is aligned with a locking block on the circumference of the outer surface of the plug. There is a uniform distance between each locking rib and the locking block it is aligned with, which is equal to the length of the plurality of protrusions.

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