Automatic rotary cutting biopsy needle

Abstract

The utility model discloses an automatic rotary cutting biopsy needle which comprises a handle, an inner needle arranged in the handle, an outer sleeve, a needle seat fixed to the outer sleeve and a driving structure matched with the needle seat to drive the inner needle, the needle seat is fixedly installed on the handle, and the inner needle penetrates through the outer sleeve and then is connected with a limiting seat in the middle of the inside of the handle. A threaded groove is formed in the inner side of the handle, a compression spring is arranged through the threaded groove in a limiting mode, the inner side of the compression spring is fixed to the outer wall of the limiting base, and due to the fact that the compression spring is arranged in a spiral groove in the inner side of the handle in a limiting mode, the compression spring can be spirally output in the spiral direction of the spiral groove when reset, and then the limiting base is spirally output. And the inner needle in the limiting seat can be spirally excited along with the outer needle to complete puncture in a spiral forward form, so that the purposes of spirally cutting tissues and completing sampling are achieved, the coaxial rotary cutting function is realized, and different from tissue damage caused by a huge rebound structure of a traditional pull-out type puncture needle, rotary cutting is softer, and damage is smaller.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic rotary cutting biopsy needles, in particular to an automatic rotary cutting biopsy needle. Background Technique

[0002] An automatic rotary cutting biopsy needle is a medical device mainly used to obtain a small amount of tissue samples from diseased tissues or organs of the human body during medical diagnosis and treatment for pathological examination, so as to clarify the nature, type, and degree of the lesion, and provide a basis for the diagnosis of diseases, the formulation of treatment plans, and the prognosis assessment. It is often used in lesion biopsies of parts such as the breast, thyroid, prostate, liver, kidney, and lung. It usually consists of a needle core, an outer sleeve, a driving device, a sample collection device, and a handle. When in use, it is necessary to use the driving device to control the rotation, advancement, and retraction of the needle core and the outer sleeve to drive the needle core. The needle core and the outer sleeve start to rotate and advance. The side holes at the front end of the outer sleeve will cut the diseased tissue and roll the tissue sample into the outer sleeve. After obtaining enough tissue samples, stop the driving device and slowly withdraw the biopsy needle from the tissue. This biopsy method is a pull-push type puncture. The pull-push type puncture needle will cause tissue damage to the puncture site of the patient during rebound, bringing certain pain to the patient's puncture operation;

[0003] Therefore, the utility model provides an automatic rotary cutting biopsy needle with softer rotary cutting and less damage. Content of the Utility Model

[0004] The purpose of the utility model is to provide an automatic rotary cutting biopsy needle to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] An automatic rotary cutting biopsy needle includes a handle, an inner needle arranged in the handle, an outer sleeve, a needle seat fixed to the outer sleeve, and a driving structure for driving the inner needle in cooperation with the needle seat. The needle seat is fixedly installed on the handle, and the inner needle passes through the outer sleeve and is connected to a limit seat in the middle of the handle;

[0007] A threaded groove is provided on the inner side of the handle, and a compression spring is limited through the threaded groove. The inner side of the compression spring is fixed to the outer wall of the limit seat, and a sliding plate for driving the compression spring in cooperation is provided on the outer side of the compression spring;

[0008] A driving block connected to the front end of the sliding plate is provided on the outside of the handle.

[0009] Further, a laterally inclined inner needle core incision is provided at the front end of the inner needle, and an outer cannula incision aligned with the inner needle core incision is provided at the front end of the outer cannula. After the inner needle enters the puncture position, the inner needle core incision is used to perform rotary cutting and sampling on the puncture position, and the outer cannula incision is used to cooperate with the inner needle core incision for sampling and retaining samples.

[0010] Further, the buckle on the bottom surface of the driving block is slidably connected to the buckle groove on the sliding plate, and the driving block is limited in the waist-shaped limiting area outside the handle, and the waist-shaped limiting area limits the range of the driving block sliding the sliding plate.

[0011] Further, the compression spring is divided into two sections. The rear section of the compression spring is connected to the limiting seat. When the sliding plate slides to compress the compression spring, the rear section of the compression spring moves in cooperation with the limiting seat. When the compression spring rotates and resets, the inner needle fixed on the limiting seat is rotated and excited forward.

[0012] Further, the handle includes an inner shell and an outer sleeve. The inner shell is composed of an upper shell and a lower shell. The compression spring is arranged in the lower shell and is limited by docking the upper shell and the lower shell. The inner shell fixedly assembles the compression spring, the limiting seat and the needle seat.

[0013] Further, the outer sleeve is sleeved outside the inner shell, and the waist-shaped limiting area is arranged on the outer sleeve. The outer sleeve fixes the inner shell together again, improves the stability of limiting the compression spring in the inner shell, and the outer sleeve is cylindrical, making it more convenient to hold the handle during the puncture operation and more convenient to use.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] For this automatic rotary cutting biopsy needle, this technology designs an automatic rotary cutting biopsy needle. By setting a compression spring in the handle to cooperate with the rotation and excitation of the inner needle, when in use, the driving block drives the sliding plate to move, and the sliding plate compresses the compression spring. After releasing the driving block, the compression spring drives the limiting seat to move after losing the compression force. Since the compression spring is limited in the spiral groove inside the handle, when the compression spring resets, it will be spirally output along the spiral direction of the spiral groove, and then spirally output to the limiting seat, and the inner needle in the limiting seat will also be spirally excited, and the puncture is completed in a spiral forward form, achieving the purpose of spiral cutting of tissues and completing sampling, realizing the function of coaxial rotary cutting. Different from the large rebound structure of the traditional pull-push type puncture needle that causes tissue damage, the rotary cutting is softer and the damage is smaller. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a structural schematic diagram of the present utility model;

[0017] Figure 2 is of the present utility model Figure 1 exploded structural schematic diagram.

[0018] In the figure: 1. handle; 2. inner needle; 3. outer sleeve; 4. needle seat; 5. limit seat; 7. compression spring; 8. slide plate; 9. drive block; 10. buckle; 11. buckle groove; 12. waist-shaped limit area; 13. inner shell; 14. outer sleeve. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-2 , the utility model provides a technical solution:

[0021] An automatic rotary cutting biopsy needle comprises a handle 1, an inner needle 2 arranged in the handle 1, an outer sleeve 3, a needle seat 4 fixed to the outer sleeve 3, and a driving structure cooperating with the needle seat 4 to drive the inner needle 2. The needle seat 4 is fixedly mounted on the handle 1, and the inner needle 2 passes through the outer sleeve 3 and is connected to a limit seat 5 in the middle of the handle 1;

[0022] The inner side of the handle 1 is provided with a thread groove and a compression spring 7 is provided through the thread groove. The inner side of the compression spring 7 is fixed to the outer wall of the limiting seat 5 and the outer side of the compression spring 7 is provided with a slide plate 8 for driving the compression spring 7.

[0023] A driving block 9 connected to the front end of the slide plate 8 is disposed outside the handle 1 .

[0024] The front end of the inner needle 2 is provided with an inner needle incision that is inclined laterally, and the front end of the outer sleeve 3 is provided with an outer sleeve 3 incision that is aligned with the inner needle incision. The inner needle incision is used to achieve rotary cutting and sampling of the puncture position after the inner needle 2 enters the puncture position. The outer sleeve incision is used to cooperate with the inner needle core incision to take samples and retain samples.

[0025] The buckle 10 on the bottom surface of the driving block 9 is slidably connected to the buckle groove 11 on the slide plate 8, and the driving block 9 is limited to the waist-shaped limiting area 12 outside the handle 1, and the waist-shaped limiting area 12 limits the range of sliding the driving block 9 on the slide plate 8.

[0026] The compression spring 7 is divided into two sections. The rear section of the compression spring 7 is connected to the limit seat 5. When the slide plate 8 slides to compress the compression spring 7, the rear section of the compression spring 7 cooperates with the limit seat 5 to move. When the compression spring 7 rotates and resets, the inner needle 2 fixed on the limit seat 5 is stimulated to rotate forward.

[0027] The handle 1 includes an inner shell 13 and an outer sleeve 14. The inner shell 13 is composed of an upper shell and a lower shell. A compression spring 7 is arranged inside the lower shell and is limited by docking the upper shell and the lower shell, and the inner shell 13 fixedly assembles the compression spring 7, the limit seat 5 and the needle seat 4.

[0028] The outer sleeve 14 is sleeved outside the inner shell 13. A waist-shaped limit area 12 is arranged on the outer sleeve 14. The outer sleeve 14 fixes the inner shell 13 together again, improving the stability of the compression spring 7 limited in the inner shell 13. And the outer sleeve 14 is cylindrical, making it more convenient to hold the handle 1 during the puncture operation and more convenient to use.

[0029] For this automatic rotary cutting biopsy needle, this technology designs an automatic rotary cutting biopsy needle. By setting a compression spring 7 in the handle 1 that cooperates with the rotation and excitation of the inner needle 2, when in use, the driving block 9 drives the sliding plate 8 to move. The sliding plate 8 compresses the compression spring 7. After releasing the driving block 9, when the compression spring 7 loses the compression force, it drives the limit seat 5 to move. Since the compression spring 7 is limited in the spiral groove inside the handle 1, when the compression spring 7 resets, it will be spirally output along the spiral direction of the spiral groove, and then spirally output to the limit seat 5. And the inner needle 2 in the limit seat 5 will also be spirally excited, and complete the puncture in a spiral forward form, achieving the purpose of spiral cutting tissue and completing sampling, realizing the function of coaxial rotary cutting. Different from the large rebound structure of the traditional pull-push type puncture needle that causes tissue damage, the rotary cutting is softer and the damage is smaller.

[0030] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic rotary biopsy needle, comprising a handle (1), an inner needle (2) disposed in the handle (1), an outer sleeve (3), and a needle seat (4) fixed to the outer sleeve (3), characterized in that: The needle seat (4) is fixedly mounted on the handle (1), and the inner needle (2) is connected to the limit seat (5) in the middle of the handle (1) after passing through the outer sleeve (3); The inner side of the handle (1) is provided with a thread groove and a compression spring (7) is provided through the thread groove to limit the position; the inner side of the compression spring (7) is fixed to the outer wall of the limiting seat (5) and the outer side of the compression spring (7) is provided with a slide plate (8) for driving the compression spring (7); The outside of the handle (1) is provided with a driving block (9) connected to the front end of the slide plate (8).

2. The automatic rotary biopsy needle according to claim 1, characterized in that: The front end of the inner needle (2) is provided with an inner needle incision which is inclined laterally, and the front end of the outer sleeve (3) is provided with an outer sleeve incision which is aligned with the inner needle incision.

3. The automatic rotary biopsy needle according to claim 1, characterized in that: The buckle (10) on the bottom surface of the driving block (9) is slidably connected to the buckle groove (11) on the slide plate (8), and the driving block (9) is limited in a waist-shaped limiting area (12) outside the handle (1).

4. The automatic rotary biopsy needle according to claim 3, characterized in that: The compression spring (7) is divided into two sections, and the rear section of the compression spring (7) is connected to the limiting seat (5).

5. The automatic rotary biopsy needle according to claim 4, characterized in that: The handle (1) comprises an inner shell (13) and an outer sleeve (14); the inner shell (13) is composed of an upper shell and a lower shell; the compression spring (7) is arranged in the lower shell, and the compression spring (7) is limited by the upper shell and the lower shell being connected.

6. The automatic rotary biopsy needle according to claim 5, characterized in that: The outer sleeve (14) is mounted on the outside of the inner shell (13), and the waist-shaped limiting area (12) is arranged on the outer sleeve (14).

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