Anti-blocking sleeve with double-layer anti-blocking structure for preventing blockage of knife tube air path in biopsy needle

Abstract

The utility model discloses an anti-blocking sleeve with a double-layer anti-blocking structure for blocking prevention of a knife tube air path in a biopsy needle, which belongs to the technical field of anti-blocking equipment of biopsy rotary cutting equipment and comprises an anti-blocking sleeve body, a vent hole is formed in the front end face of the anti-blocking sleeve body and communicated with a main air hole, and the main air hole is located at the rear end of the anti-blocking sleeve body. A blocking piece is arranged on the front side of the anti-blocking sleeve body and fixedly connected with the front end of the anti-blocking sleeve body. According to the utility model, the sample tissue is intercepted through the separation blade, and the gap formed between the separation blade and the inner knife tube is used as a gas path, so that the sample tissue can be effectively prevented from being separated under the pulling of vacuum negative pressure, and meanwhile, formed chips can be blocked by the gap, so that the gas path is prevented from being blocked.

Description

Technical Field

[0001] The utility model belongs to the technical field of anti-blocking equipment for biopsy rotary cutting equipment, in particular to an anti-blocking sleeve for preventing the blockage of the gas path of a knife tube in a biopsy needle with a double-layer anti-blocking structure. Background Art

[0002] In a biopsy needle, the anti-blocking sleeve is a very important component. First, it provides a vacuum negative pressure airflow path for the inner knife tube, which requires a certain flow area. Second, it pushes the sample tissue out of the inner knife tube when the inner knife tube is retracted, and prevents sample debris from entering the inner hole of the inner knife tube connecting the trachea to prevent air path blockage.

[0003] The existing anti-blocking sleeve is generally an arched structure, which has a better blocking effect on intact tissues with strong self-cohesion. However, the sample tissue structure in clinical practice is extremely complex, including glands, fat, cystic nodules, solid nodules, calcified nodules and other forms and combinations of forms. The sample tissue is pulled and sucked into the anti-blocking sleeve air path under vacuum negative pressure suction; due to the weak bonding between different tissue types, some diseased tissues are even separated from other tissues by membranes and have almost no bonding; they are very easy to separate under the pull of vacuum negative pressure, which can easily cause sample debris to block the air path. Utility Model Content

[0004] In view of the above problems, the utility model provides an anti-blocking sleeve for preventing blockage of the air path of the inner blade tube of a biopsy needle with a double-layer anti-blocking structure. The sample tissue is intercepted by a baffle and the gap formed between the baffle and the inner blade tube is used as the air path, which can effectively prevent the sample tissue from separating under the pull of vacuum negative pressure. At the same time, the debris formed can also be blocked by the gap to prevent the air path from being blocked.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A blocking sleeve for preventing blockage of the air path of a biopsy needle inner knife tube with a double-layer blocking structure comprises an blocking sleeve body, a front end surface of the blocking sleeve body is provided with an air vent, the air vent is connected with a main air hole, the main air hole is located at the rear end of the blocking sleeve body, and a blocking piece is provided on the front side of the blocking sleeve body, and the blocking piece is fixedly connected to the front end of the blocking sleeve body.

[0007] As a further improvement of the above technical solution, a concave surface is provided at the front end of the baffle.

[0008] As a further improvement of the above technical solution, the concave shape is a spherical shape, and the concave radius of the spherical shape is 4-10 mm.

[0009] As a further improvement of the above technical solution, the difference between the radius of the anti-blocking sleeve body and the radius of the baffle is 0.1-0.3 mm.

[0010] As a further improvement of the above technical solution, both sides of the baffle are connected to the front end of the anti-blocking sleeve body through connecting columns, and there is a gap between the baffle and the anti-blocking sleeve body, allowing airflow to flow into the vent hole through the gap.

[0011] As a further improvement of the above technical solution, the vent hole is located at the center of the front end surface of the anti-blocking sleeve body, wherein the diameter of the vent hole is less than 0.8 mm.

[0012] As a further improvement of the above technical solution, the distance between the baffle and the front end surface of the anti-blocking sleeve body is 2-3 mm.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model provides an anti-blocking sleeve for preventing blockage of the air path of the inner blade tube of a biopsy needle with a double-layer anti-blocking structure, which intercepts the sample tissue through the baffle and uses the gap formed between the baffle and the inner blade tube as the air path, which can effectively prevent the sample tissue from separating under the pull of vacuum negative pressure, and the debris formed can also be blocked by the gap to prevent the air path from being blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the cross-sectional structure of the anti-blocking sleeve of the utility model.

[0015] Figure 2 It is a schematic diagram of the three-dimensional structure of the anti-blocking sleeve of the utility model.

[0016] Figure 3 This is a schematic diagram of the working principle structure of the anti-blocking sleeve of the utility model.

[0017] Figure 4 This is a schematic diagram of the double-layer anti-blocking working state of the utility model.

[0018] In the figure: 1. Anti-blocking sleeve body; 2. Vent hole; 3. Main air hole; 4. Baffle; 5. Concave surface; 6. Connecting column. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model is described in detail below in conjunction with the embodiments. The description in this section is only exemplary and explanatory and should not have any limiting effect on the protection scope of the utility model. Example

[0020] A blocking sleeve for preventing blockage of the air path of a knife tube in a biopsy needle with a double-layer blocking structure comprises an blocking sleeve body 1, a vent hole 2 is arranged on the front end surface of the blocking sleeve body 1, the vent hole 2 is communicated with a main air hole 3, the main air hole 3 is located at the rear end of the blocking sleeve body 1, a baffle 4 is arranged on the front side of the blocking sleeve body 1, and the baffle 4 is fixedly connected to the front end of the blocking sleeve body 1.

[0021] like Figure 1-4 As shown, the anti-blocking sleeve has a double-layer anti-blocking structure. A vent hole 2 is arranged on the end face of the anti-blocking sleeve body 1, and a layer of baffle 4 is also arranged at the front end of the end face, wherein both sides of the baffle 4 are connected to the front end of the anti-blocking sleeve body 1 through connecting columns 6, and a gap is formed between the connecting columns 6 on both sides of the baffle 4. When the anti-blocking sleeve is placed in the inner knife tube, the gap connects the front end of the baffle 4 with the vent hole 2. The radius of the baffle 4 is smaller than the radius of the anti-blocking sleeve body 1, and the difference between the two is less than 0.3mm. The gap is the vacuum negative pressure flow section, as shown in FIG. Figure 3 As shown, when the anti-blocking sleeve is located in the inner knife tube, the gap between the baffle 4 and the inner knife tube is 0.3mm; the anti-blocking sleeve adopts a double-layer structure, and the top surface of the baffle 4 adopts a concave spherical design, and the spherical radius is preferably SR4~SR10m; when the anti-blocking sleeve pushes the sample tissue out of the inner knife tube, it is beneficial to maintain the integrity of the sample under vacuum negative pressure suction, avoid the sample tissue being pulled and separated by the vacuum negative pressure to produce larger and more sample debris, reduce the risk of sample debris blocking the air path, and also help to reduce the time required for cleaning the sample debris at the anti-blocking sleeve, thereby improving the sampling efficiency; as shown in FIG. Figure 4 As shown, there are four air holes with a diameter less than 0.8 mm in the middle of the anti-blocking sleeve, which are used to pass vacuum negative pressure and intercept sample debris; the distance between the baffle 4 and the front end surface of the anti-blocking sleeve body 1 is 3 mm.

[0022] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0023] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention.

[0024] The above is only a preferred embodiment of the present utility model. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the present utility model, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the protection scope of the present utility model.

Claims

1. An anti-blocking sleeve for preventing the air passage of the inner blade tube of a biopsy needle with a double-layer anti-blocking structure, characterized in that: The invention comprises an anti-blocking sleeve body (1), a front end surface of the anti-blocking sleeve body (1) is provided with a vent hole (2), the vent hole (2) is connected with a main air hole (3), the main air hole (3) is located at the rear end of the anti-blocking sleeve body (1), and a baffle (4) is provided on the front side of the anti-blocking sleeve body (1), and the baffle (4) is fixedly connected to the front end of the anti-blocking sleeve body (1).

2. The anti-blocking sleeve for preventing the air passage of the inner blade tube of a biopsy needle with a double-layer anti-blocking structure according to claim 1, characterized in that: The front end of the baffle (4) is provided with a concave surface (5).

3. The anti-blocking sleeve for preventing the air passage of the inner blade tube of a biopsy needle with a double-layer anti-blocking structure according to claim 2, characterized in that: The concave surface (5) is in a spherical shape, and the radius of the spherical concave surface (5) is 4-10 mm.

4. The anti-blocking sleeve for preventing the air passage of the inner blade tube of a biopsy needle with a double-layer anti-blocking structure according to claim 1, characterized in that: The difference between the radius of the anti-blocking sleeve body (1) and the radius of the baffle (4) is 0.1-0.3 mm.

5. The anti-blocking sleeve for preventing the air passage of the inner blade tube of a biopsy needle with a double-layer anti-blocking structure according to claim 1, characterized in that: Both sides of the baffle (4) are connected to the front end of the anti-blocking sleeve body (1) via connecting columns (6); a gap exists between the baffle (4) and the anti-blocking sleeve body (1), and airflow is allowed to flow into the vent hole (2) through the gap.

6. The anti-blocking sleeve for preventing the air passage of the inner blade tube of a biopsy needle with a double-layer anti-blocking structure according to claim 1, characterized in that: The vent hole (2) is located at the center of the front end surface of the anti-blocking sleeve body (1), wherein the diameter of the vent hole (2) is less than 0.8 mm.

7. The anti-blocking sleeve for preventing the air passage of the inner blade tube of a biopsy needle with a double-layer anti-blocking structure according to claim 6, characterized in that: The distance between the blocking piece (4) and the front end surface of the anti-blocking sleeve body (1) is 2-3 mm.

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