Reducing cytobrush

Abstract

The utility model discloses a diameter-variable cytobrush, which relates to the technical field of cytobrushes and comprises a sleeve, a containing bag arranged at the tail end of the sleeve and a pushing rod penetrating through the containing bag and extending into the sleeve, and limiting frames matched with the pushing rod are arranged at the two ends of the inner wall of the containing bag. Baffle rings are arranged on the surfaces, close to the opposite sides of the two limiting frames, of the pushing rod, bristles are arranged on the side, located between the two baffle rings, of the pushing rod, penetrating holes are formed in the side, close to the bristles, of the containing bag, the penetrating holes and the corresponding bristles are horizontally staggered in the axial direction of the containing bag, and it is ensured that the bristles and the corresponding penetrating holes incline; when the through hole is aligned with the bristles, the bristles of the inclined part can extend out of the through hole, so that the length of the part, outside the containing bag, of the bristles is increased, the bristles are inclined in the containing bag in the process that an operator sends the containing bag into the needed position, the part, located outside the containing bag, of the bristles is small, and the influence of non-sampling parts on the bristles is small; and the sampling result is more accurate.

Description

Technical Field

[0001] This utility model relates to the field of cell brush technology, and in particular to a variable diameter cell brush. Background Technology

[0002] A cell brush is a medical device primarily used to extract cell samples from the human body during endoscopic examinations. These brushes are typically made of soft fibrous materials to minimize damage to biological tissues, while the handle provides gripping and manipulation functions.

[0003] The Chinese invention patent / utility model patent (application number: CN202322390858.0) discloses a variable diameter cell brush, which expands the narrow section by introducing a medium through a balloon, and controls the conical bristles to extend out of the sheath through the through hole by a control mechanism, so as to facilitate the passage through the narrow section. This avoids the problems that conventional cell brushes have difficulty in sampling when encountering narrow sections or when large samples are required. They are not convenient to pass through narrow sections, resulting in small sample volume, low sampling efficiency, and increased surgical risks. The increased bristle sampling volume reduces surgical risks.

[0004] However, the length of the sampling bristles of the cell brush remains unchanged. Although the sample can be increased by approaching the sampling position through the narrow part, the insufficient length of the bristles limits the maximum sample size. Furthermore, the sample has limited adhesion to the surface of the bristles with insufficient length, which may cause the sample to detach during the subsequent removal process. Utility Model Content

[0005] To overcome the shortcomings of the existing technology, the purpose of this utility model is to solve the problem that the length of the sampling bristles of the cell brush remains unchanged. Although the sampling amount can be increased by approaching the sampling position through the narrow part, the insufficient length of the bristles themselves limits the maximum sampling amount of the bristles. Furthermore, the adhesion of the sample to the surface of the insufficiently long bristles is limited, which may cause the sample to detach during the subsequent retrieval process.

[0006] To solve the problems of the prior art, the technical solution of this utility model is as follows: it includes a sleeve, a receiving bladder disposed at the end of the sleeve, and a push rod extending through the receiving bladder into the inside of the sleeve. The inner walls of the receiving bladder are provided with limiting frames adapted to the push rod at both ends. A retaining ring is provided on the surface of the push rod near the two limiting frames facing each other. A brush is provided on the side of the push rod between the two retaining rings. A perforation is opened on the side of the receiving bladder near the brush. The brush extends outward along the perforation. A plug is provided at the end of the push rod near the receiving bladder.

[0007] Furthermore, the container is spindle-shaped, with both ends of the push rod extending to the end of the container, and the container is made of flexible rubber material to ensure that the container will not cause significant impact on the surroundings during movement.

[0008] Furthermore, the spacing between the retaining rings is smaller than the spacing between the two limiting frames, allowing the push rod to move between the two limiting frames, but the displacement distance is limited by the retaining rings.

[0009] Furthermore, there are multiple bristles and perforations, with each bristle extending outward through a perforation, ensuring that each bristle can extend outward to the outside of the receiving bladder and is restricted by the perforation.

[0010] Furthermore, the perforations and corresponding bristles are horizontally staggered along the axial direction of the receiving bladder, and the staggering direction is towards the side of the plug, ensuring that the bristles and the corresponding perforations are inclined.

[0011] Furthermore, the side of the plug near the push rod abuts against the end of the receiving bladder, so that the end of the push rod is in a closed state during movement.

[0012] Compared with the prior art, the advantages of this utility model are as follows:

[0013] The perforations and corresponding bristles are horizontally staggered along the axial direction of the container, with the staggering direction facing the end cap. This ensures that the bristles are inclined relative to the corresponding perforations. When the perforations and bristles are aligned, the inclined portion of the bristles extends beyond the perforations, increasing the length of the bristles outside the container. Furthermore, as the operator inserts the container into the desired position, the bristles are inclined inside the container, with less of the portion outside the container. This minimizes the impact of non-sampling portions on the bristles, resulting in more accurate sampling results. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 This is a cross-sectional schematic diagram of the containment capsule of this utility model.

[0016] Figure 3 This is a schematic diagram of the bristles of this utility model in the extended state.

[0017] Reference numerals: 1. Sleeve; 2. Receptacle; 3. Push rod; 4. Limiting frame; 5. Retaining ring; 6. Brush bristles; 7. Perforation; 8. Plug. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] like Figure 1-3As shown, a variable diameter cell brush includes a sleeve 1, a receiving bladder 2 disposed at the end of the sleeve 1, and a push rod 3 extending through the receiving bladder 2 into the inside of the sleeve 1. The receiving bladder 2 is generally spindle-shaped, and both ends of the push rod 3 extend to the end of the receiving bladder 2. The receiving bladder 2 is made of flexible rubber material to ensure that the receiving bladder 2 will not cause significant impact on the surroundings during movement. The inner wall of the receiving bladder 2 is provided with limiting frames 4 adapted to the push rod 3 at both ends. The surface of the push rod 3 near the two limiting frames 4 facing each other is provided with retaining rings 5. The spacing between the retaining rings 5 ​​is smaller than the spacing between the two limiting frames 4, so that the push rod 3 can be displaced between the two limiting frames 4, but the displacement distance is limited by the retaining rings 5.

[0020] The push rod 3 is provided with bristles 6 on one side between the two retaining rings 5. The receiving bladder 2 is provided with a perforation 7 on the side near the bristles 6. The bristles 6 extend to the outside along the perforation 7. There are several bristles 6 and perforations 7. Each bristle 6 extends to the outside through a perforation 7, ensuring that each bristle 6 can extend to the outside of the receiving bladder 2 and is restricted by the perforation 7. The perforation 7 and the corresponding bristle 6 are horizontally staggered along the axial direction of the receiving bladder 2, and the staggered direction is towards the side facing the plug 8, ensuring that the bristles 6 and the corresponding perforation 7 are inclined. The end of the push rod 3 near the receiving bladder 2 is provided with a plug 8. The side of the plug 8 near the push rod 3 abuts against the end of the receiving bladder 2, so that the end of the push rod 3 is in a closed state during movement.

[0021] Working principle explanation: First, the operator inserts the entire structure into the patient's body, close to the sampling position. During this process, the bristles 6 are tilted inside the receiving pouch 2, with a limited extension to the outside of the receiving pouch 2, reducing the maximum diameter of the entire structure to facilitate passage through narrow areas. Once the desired position is reached, the operator pushes the push rod 3 inside the cannula 1. The portion of the push rod 3 inside the receiving pouch 2 is displaced. During this displacement, the connection between the surface of the push rod 3 and the bristles 6 gradually approaches the perforation 7. In this process, the distance between the perforation 7 and the bottom of the bristles 6 shortens, and the bristles 6 protrude along the perforation 7, increasing the length of the bristles 6 on the outside of the receiving pouch 2, thereby increasing the maximum diameter of the entire structure.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A variable-diameter cell brush, comprising a cannula (1), a receiving sac (2) disposed at the end of the cannula (1), and a pusher (3) extending through the receiving sac (2) into the interior of the cannula (1), characterized in that: The inner wall of the containment bladder (2) is provided with limiting frames (4) that are adapted to the push rod (3) at both ends. The push rod (3) is provided with a retaining ring (5) on the surface of the push rod (3) near the two limiting frames (4) facing each other. The push rod (3) is provided with bristles (6) on the side between the two retaining rings (5). The containment bladder (2) is provided with a perforation (7) on the side near the bristles (6). The bristles (6) extend to the outside along the perforation (7). The end of the push rod (3) near the containment bladder (2) is provided with a plug (8).

2. A variable diameter cell brush according to claim 1, characterized in that: The container (2) is generally spindle-shaped, and both ends of the push rod (3) extend to the end of the container (2), and the container (2) is made of flexible rubber material.

3. A variable diameter cell brush according to claim 1, characterized in that: The spacing between the retaining rings (5) is less than the spacing between the two limiting frames (4).

4. A variable diameter cell brush according to claim 1, characterized in that: There are several bristles (6) and perforations (7), and each bristle (6) extends outward through a perforation (7).

5. A variable diameter cell brush according to claim 4, characterized in that: The perforations (7) and the corresponding bristles (6) are horizontally intersected along the axial direction of the receiving bladder (2), and the intersecting direction is towards the side facing the plug (8).

6. A variable diameter cell brush according to claim 1, characterized in that: The plug (8) abuts against the end of the receiving bladder (2) on the side near the push rod (3).

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