Rotary cutting and movable picking device

Abstract

The utility model discloses a rotary cutting and movable picking device which comprises a puncture guide sleeve and a biopsy assembly, the biopsy assembly comprises a biopsy needle sleeve and a biopsy needle, the biopsy needle sleeve can be inserted into the puncture guide sleeve from the tail end of the puncture guide sleeve and reaches a preset position to be locked, the biopsy needle can be inserted into the biopsy needle sleeve from the tail end of the biopsy needle sleeve and can spirally extend out of the head ends of the biopsy needle sleeve and the puncture guide sleeve relative to a biopsy needle sleeve knob after reaching a preset position, a conical needle head is arranged at the head end of the biopsy needle, a spiral groove is formed in the position, close to the conical needle head, of the biopsy needle, and the spiral groove is communicated with the biopsy needle sleeve. Compared with a traditional biopsy needle, less than half of the depth is needed to obtain tissues with the same length, the biopsy needle is easy to control, and the probability of injuring main blood vessels is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, concretely is a kind of rotary cutting and picking device. BACKGROUND

[0002] Liver biopsy is full name ultrasound-guided liver puncture histological biopsy, percutaneous liver puncture is according to the principle of negative pressure suction, using fast puncture method, from liver extraction small amount of liver tissue, directly observe its tissue morphology change under microscope, then combine clinical data, make the diagnosis of liver disease, but because the specimen is smaller, it is still difficult to completely represent the whole lesion of liver, but like viral hepatitis, fatty liver, various types of cirrhosis, etc., its liver lesion is diffuse, so although the liver tissue taken is smaller, the nature and degree of lesion can be accurately reflected.

[0003] When doing liver biopsy, patient is required to be in supine position, and the probe is used to check the patient's body to determine the next puncture site, then the liver biopsy needle is used to puncture into liver site to extract liver tissue, currently, in order to detect accurately, biopsy needle often needs to take out more tissue, then more tissue needs to be inserted into deeper position, which leads to easy injury to main blood vessels. SUMMARY

[0004] This section aims to outline some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the title of the utility model in order to avoid obscuring the purpose of this section, the abstract of the specification and the title of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] Therefore, the purpose of the utility model is to provide a rotary cutting and picking device, which only needs less than half of the depth to obtain the same length of tissue, and reduces the probability of injury to main blood vessels.

[0006] To solve the above technical problems, according to one aspect of the utility model, the utility model provides the following technical scheme:

[0007] A rotary cutting and picking device, comprising:

[0008] A puncture guide sleeve;

[0009] A biopsy assembly, comprising a biopsy needle sleeve and a biopsy needle, which can be inserted into the inside of the tail end of the puncture guide sleeve and locked at a predetermined position;

[0010] Wherein, after the biopsy needle is inserted into the inside of the tail end of the biopsy needle sleeve and reaches the predetermined position, the biopsy needle can be rotated relative to the biopsy needle sleeve to extend spirally from the head end of the biopsy needle sleeve and the puncture guide sleeve;

[0011] The biopsy needle has a tapered tip, and a spiral groove is provided near the tapered tip.

[0012] In a preferred embodiment of the rotary cutting and live picking device of this utility model, the tip of the puncture guide sleeve has multiple elastic plates, and the multiple elastic plates form a cone-shaped puncture needle in the initial state. When the puncture guide sleeve passes through the tip of the puncture guide sleeve, the puncture needle is opened.

[0013] In a preferred embodiment of the rotary cutting and live picking device described in this utility model, the inner wall of the tail end of the puncture guide sleeve has a first internal thread.

[0014] The outer wall of the biopsy needle cannula near the tail end is provided with a first external thread that matches the first internal thread.

[0015] In a preferred embodiment of the biopsy needle cannula described in this utility model, a first handle is provided at the tail end of the biopsy needle cannula.

[0016] As a preferred embodiment of the rotary cutting and biopsy device of this utility model, the inner wall of the tail end of the biopsy needle sheath has a second internal thread;

[0017] The biopsy needle has a second external thread near its tail end on its outer wall, which is adapted to the second internal thread.

[0018] In a preferred embodiment of the biopsy needle described in this utility model, a second handle is provided at the tail end of the biopsy needle.

[0019] As a preferred embodiment of the rotary cutting and live picking device of this utility model, it further includes a positioning component disposed on the outer wall of the puncture guide sleeve for positioning the puncture guide sleeve.

[0020] As a preferred embodiment of the rotary cutting and live picking device of this utility model, the positioning component includes a base with a guide block, a top seat that cooperates with the base, an elastic component disposed in the base and close to one side wall, and a button sleeved on the guide block and capable of sliding along the guide block to squeeze the elastic component.

[0021] The button extends from the side away from the elastic component, the inner wall of the guide block is provided with a first semi-circular groove, and the inner wall of the button opposite to the first semi-circular groove is provided with a second semi-circular groove.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting a spiral groove near the tip of the biopsy needle, the biopsy needle can be advanced relative to the biopsy needle cannula knob after reaching the predetermined position inside the biopsy needle cannula, and spirally exit from the tip of the biopsy needle cannula to sample tissue. Compared with traditional biopsy needles, obtaining the same length of tissue only requires less than half the depth, and it is easier to control, reducing the probability of damaging major blood vessels. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0024] Figure 1 This is a schematic diagram of the overall structure of a rotary cutting and live picking device according to the present invention;

[0025] Figure 2 This is a schematic diagram of the puncture guide sleeve of a rotary cutting and live-picking device according to the present invention;

[0026] Figure 3 This is a schematic diagram of the biopsy needle sheath of a rotary cutting biopsy device according to the present invention;

[0027] Figure 4 This is a cross-sectional structural diagram of the biopsy needle sheath of a rotary cutting biopsy device according to the present invention;

[0028] Figure 5 This is a schematic diagram of the biopsy needle of the rotary cutting biopsy device of this utility model;

[0029] Figure 6 This is a schematic diagram of the positioning component of a rotary cutting and live picking device according to the present invention. Detailed Implementation

[0030] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0031] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0033] This invention provides a rotary cutting and live-picking device that requires less than half the depth to obtain the same length of tissue, reducing the probability of damaging major blood vessels.

[0034] Figures 1-6 The diagram shown is a structural schematic of one embodiment of the rotary cutting and live-picking device of this utility model. Please refer to [link / reference]. Figures 1-6 The main body of the rotary cutting biopsy device of this embodiment includes a puncture guide cannula 100, a biopsy needle cannula 200, and a biopsy needle 300.

[0035] The puncture guide cannula 100 is used for pre-puncture guidance, providing a puncture channel for the biopsy needle assembly. In this embodiment, the tip of the puncture guide cannula 100 has multiple elastic pieces 110, and the multiple elastic pieces 110 form a cone-shaped puncture needle in the initial state. When the puncture guide cannula 100 is passed through the tip, the puncture needle is opened, replacing the traditional design of a detachable puncture catheter and puncture needle. This simplifies the cumbersome steps of removing the puncture needle from the puncture catheter and then inserting the biopsy needle 300 after puncture guidance. The puncture guide cannula 100 can be directly inserted into the biopsy assembly after puncture guidance.

[0036] The biopsy assembly includes a biopsy needle cannula 200 that can be inserted into the puncture guide cannula 100 from the tail end and locked in a predetermined position, and a biopsy needle 300. The tip of the biopsy needle 300 has a tapered needle tip 310, and a spiral groove 320 is provided on the biopsy needle 300 near the tapered needle tip 310.

[0037] In this embodiment, to facilitate biopsy sampling, the following structure is designed: the inner wall of the tail end of the puncture guide sheath 100 has a first internal thread 120, and the outer wall of the biopsy needle sheath 200 near the tail end has a first external thread 210 that matches the first internal thread 120, so that after the biopsy needle sheath 200 is inserted into the puncture guide sheath 100 and reaches the predetermined position, the biopsy needle sheath 200 is fixed. Preferably, the biopsy needle sheath 200 has a first handle 220 at the tail end.

[0038] In this embodiment, to avoid excessive puncture and damage to major blood vessels, the following structure is designed: the inner wall of the tail end of the biopsy needle cannula 200 has a second internal thread 230, and the outer wall of the biopsy needle 300 near the tail end has a second external thread 330 that matches the second internal thread 230. This allows the biopsy needle 300 to be spirally advanced during puncture, requiring less than half the depth to obtain the same length of tissue. Preferably, in this embodiment, the biopsy needle 300 has a second handle 340 at the tail end.

[0039] Combination Figures 1-5 The specific usage process of the rotary cutting and live-picking device in this embodiment is as follows:

[0040] S1. The probe examines the patient's body to determine the next puncture site, and then the puncture guide cannula 100 is inserted into the predetermined site in the liver.

[0041] S2. Then, the biopsy needle cannula 200 of the biopsy assembly is inserted into the puncture guide cannula 100. When it reaches the predetermined position, the first internal thread 120 and the first external thread 210 contact each other. Then, the biopsy needle cannula 200 is turned clockwise. At this time, due to the cooperation of the first internal thread 120 and the first external thread 210, the biopsy needle cannula 200 extends a short distance from the puncture needle tip of the puncture guide cannula 100. Then, the turning of the biopsy needle cannula 200 is stopped. At this time, the biopsy needle cannula 200 and the puncture guide cannula 100 are locked relative to each other.

[0042] S3. Insert the biopsy needle 300 into the biopsy needle cannula 200. When it reaches the predetermined position, the second internal thread 230 and the second external thread 330 contact each other. Then, turn the knob clockwise to insert the biopsy needle 300. At this time, due to the engagement of the second internal thread 230 and the second external thread 330, the biopsy needle cannula 200 spirally passes out from the biopsy needle cannula 200. The tissue is then spirally cut by feeding through the spiral. The cut tissue is located in the spiral groove 320.

[0043] S4. After obtaining tissue at the required depth, stop turning the biopsy needle 300 clockwise and turn it counterclockwise to return the biopsy needle 300 back into the biopsy needle cannula 200. When the second internal thread 230 and the second external thread 330 are separated by turning the knob counterclockwise, the biopsy needle 300 can be withdrawn.

[0044] S5. Then, withdraw the biopsy needle cannula 200 and the puncture guide cannula 100 in sequence to complete the biopsy of the tissue.

[0045] For preference, please refer to Figure 6In this embodiment, to position the guide cannula 100 when it is inserted into the predetermined location in the liver and to prevent it from moving, the present invention also provides a positioning component 400. The positioning component 400 is disposed on the outer wall of the puncture guide cannula 100 to position it. Specifically, the positioning component 400 includes a base 410 with a guide block 410a, a top seat 420 cooperating with the base 410, an elastic component 430 disposed within the base 410 and near one side wall, and a button 440 sleeved on the guide block 410a and capable of sliding along the guide block 410a to compress the elastic component 430. The button 440... The guide block 410a extends from the side away from the elastic member 430. The inner wall of the guide block 410a is provided with a first semi-circular groove 410a-1. The inner wall of the button 440 opposite to the first semi-circular groove 410a-1 is provided with a second semi-circular groove 440a. In actual use, the positioning member 400 is attached to the skin at the puncture site using medical adhesive. When the button 440 is pressed, the positioning member 400 releases its clamping on the puncture guide cannula 100, allowing the guide cannula 100 to be inserted into the predetermined site of the liver. After the guide cannula 100 is inserted into the predetermined site of the liver, the button 440 is released, and the positioning member 400 clamps the guide cannula 100.

[0046] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A rotary cutting and live-picking device, characterized in that, include: Puncture guidance cannula (100); The biopsy assembly includes a biopsy needle cannula (200) that can be inserted into the interior of a puncture guide cannula (100) and locked in a predetermined position, and a biopsy needle (300). The biopsy needle (300) can be inserted into the biopsy needle cannula (200) from the tail end and reach the predetermined position, and then be screwed out from the head end of the biopsy needle cannula (200) and the puncture guide cannula (100) by rotating the knob relative to the biopsy needle cannula (200). The biopsy needle (300) has a tapered needle tip (310) at its tip end, and a spiral groove (320) is provided on the biopsy needle (300) near the tapered needle tip (310).

2. The rotary cutting and live-picking device according to claim 1, characterized in that, The tip of the puncture guide cannula (100) has multiple elastic plates (110), and the multiple elastic plates (110) form a cone-shaped puncture needle in the initial state. When the puncture guide cannula (100) is passed through the tip of the puncture guide cannula (100), the puncture needle is opened.

3. The rotary cutting and live-picking device according to claim 1, characterized in that, The inner wall of the tail end of the puncture guide sleeve (100) has a first internal thread (120). The outer wall of the biopsy needle cannula (200) near the tail end is provided with a first external thread (210) that is compatible with the first internal thread (120).

4. The rotary cutting and live-picking device according to claim 3, characterized in that, The biopsy needle cannula (200) is provided with a first handle (220) at the tail end.

5. The rotary cutting and live-picking device according to claim 1, characterized in that, The inner wall of the tail end of the biopsy needle cannula (200) has a second internal thread (230). The biopsy needle (300) has a second external thread (330) near the tail end on its outer wall, which is adapted to the second internal thread (230).

6. The rotary cutting and live-picking device according to claim 5, characterized in that, The biopsy needle (300) is provided with a second handle (340) at the tail end.

7. The rotary cutting and live-picking device according to claim 1, characterized in that, It also includes a positioning component (400) disposed on the outer wall of the puncture guide cannula (100) for positioning the puncture guide cannula (100).

8. The rotary cutting and live-picking device according to claim 7, characterized in that, The positioning component (400) includes a base (410) with a guide block (410a), a top seat (420) that cooperates with the base (410), an elastic component (430) disposed in the base (410) and close to one side wall, and a button (440) that is sleeved on the guide block (410a) and can slide along the guide block (410a) to compress the elastic component (430). The button (440) extends from the side away from the elastic member (430), the inner wall of the guide block (410a) is provided with a first semi-circular groove (410a-1), and the inner wall of the button (440) opposite to the first semi-circular groove (410a-1) is provided with a second semi-circular groove (440a).

Images