A cell brush
The cell brush, designed with a cannula and telescopic shaft, solves the problem of bristle bending, enabling efficient and accurate cell sampling and reducing insufficient sampling and patient irritation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FOSHAN DIHUA TECH CO LTD
- Filing Date
- 2025-06-20
- Publication Date
- 2026-06-30
AI Technical Summary
The bristles of existing cell brushes tend to bend when inserted into a patient, leading to insufficient sampling and incomplete samples, which affects the accuracy of the test.
Design a sleeve and telescopic shaft structure, in which the bristles can extend and retract inside and outside the sleeve. When inserted, the bristles retract to protect them, and when sampling, they extend to perform sampling. After sampling, the bristles are hidden to reduce friction and the risk of scraping.
It improves the efficiency and accuracy of cell sampling, reduces brush bristle bending and sample loss, and minimizes patient irritation.
Smart Images
Figure CN224421041U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, and in particular to a cell brush. Background Technology
[0002] In the field of medical testing, cell brushes are key tools for in vivo cell sampling. Their working principle involves inserting the brush into the patient's body, where bristles on the outer wall of the brush scrape against the inner wall of the sampling site to obtain cell samples, providing crucial information for disease diagnosis. Currently, most cell brushes on the market use a method of directly implanting bristles onto the brush body surface; this conventional structure has significant drawbacks in practical applications.
[0003] When a cell brush is inserted into a patient's body to scrape cells, the bristles are prone to bending due to the complex internal environment, confined space, and tissue resistance. Bending not only alters the original scraping angle and force, reducing cell collection efficiency, but can also lead to insufficient or incomplete sampling, affecting the accuracy and reliability of subsequent medical tests. Utility Model Content
[0004] The purpose of this invention is to provide a cell brush to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.
[0005] The solution to the technical problem of this utility model is:
[0006] A cell brush comprising:
[0007] The sleeve has a through hole on its side wall;
[0008] The telescopic shaft has bristles on its outer wall. The bristles can pass through the through hole and exit the sleeve. The telescopic shaft can slide and be positioned inside the sleeve along the axial direction of the sleeve. The telescopic shaft can be moved until the bristles extend out or retract into the sleeve.
[0009] This technical solution has at least the following beneficial effects: When a cell brush is needed to sample a patient, the telescopic shaft is first moved until the bristles are fully retracted into the cannula. At this time, the cell brush is rod-shaped and has a smooth surface, which can be smoothly inserted into the patient's body, such as the mouth, cervix, or urethra, reducing the friction of the bristles on the inner wall of the sampling site. After the cell brush cannula is inserted into the predetermined position, the telescopic shaft is pushed to move inside the cannula until the bristles extend out of the cannula to sample the cells. At this time, medical staff can slightly rotate the entire cell brush so that the bristles can fully contact the side walls of the sampling site. Then, the telescopic shaft is pulled out to return the bristles to the cannula, and then the entire cell brush is pulled out from the sampling site. At this time, the cannula can protect the bristles, so that the bristles retain as much tissue as possible from the sampling site, improving the accuracy of the test.
[0010] In summary, designing the brush bristles to extend and retract both inside and outside the cannula can protect the bristles before sampling begins, reducing friction between the bristles and the inside of the sampling site that could cause bending and thus improve sampling efficiency. It can also retract the bristles back into the cannula after sampling, reducing friction between the bristles and the inner wall when they exit the sampling site, thereby reducing the risk of scraping away the sampled tissue.
[0011] As a further improvement to the above technical solution, a drive assembly is also included. The drive assembly includes a mounting bracket and a knob. The mounting bracket is connected to the sleeve. One end of the knob is threaded into the mounting bracket. The telescopic shaft is connected to the end of the knob opposite to the threaded connection. The telescopic shaft and the knob rotate coaxially. The telescopic shaft is rotatably connected to the mounting bracket.
[0012] As a further improvement to the above technical solution, a locking part is provided at one end of the telescopic shaft connected to the knob. The locking part extends in a direction perpendicular to the axial direction of the telescopic shaft, and the end of the locking part away from the telescopic shaft is inserted into the knob.
[0013] As a further improvement to the above technical solution, the mounting bracket is provided with a handle, and an active space is formed inside the handle, and the knob is installed in the active space.
[0014] As a further improvement to the above technical solution, the handle and the mounting bracket are integrally formed.
[0015] As a further improvement to the above technical solution, the telescopic shaft is provided with multiple sets of bristles along the circumferential direction, and the sleeve is provided with multiple through holes along the circumferential direction. The multiple through holes correspond one-to-one with the multiple sets of bristles, and the multiple sets of bristles extend out of the sleeve through the corresponding through holes.
[0016] As a further improvement to the above technical solution, multiple bristles in the same group are arranged spirally at intervals along the axial direction of the telescopic shaft, and the through holes all extend along the corresponding bristle arrangement direction.
[0017] As a further improvement to the above technical solution, the distance between the ends of the multiple bristles arranged in the same group along the direction from away from to near the mounting frame and the telescopic shaft gradually decreases.
[0018] As a further improvement to the above technical solution, the sleeve includes a tube body and an insertion part connected to each other, the diameter of the tube body is larger than the diameter of the insertion part, and the through hole is opened at the insertion part.
[0019] As a further improvement to the above technical solution, the telescopic shaft is made of nickel-titanium alloy. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of this utility model, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the structure of the cell brush bristles of this utility model in the extended state;
[0022] Figure 2 yes Figure 1 Enlarged view of A in the middle;
[0023] Figure 3 This is a schematic diagram of the structure of the cell brush bristles of this utility model in the retracted state;
[0024] Figure 4 This is a partial structural cross-sectional view of the cell brush of this utility model from a side view perspective;
[0025] Figure 5 yes Figure 3 A magnified view of B in the middle. Detailed Implementation
[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0027] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0028] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.
[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0030] A cell brush is a tool used to insert into a patient's body and collect cells by scraping the inner wall of the sampling site with bristles on the outer wall. Existing cell brushes have bristles directly implanted on the surface of the brush body. When the brush is inserted into the patient's body to scrape cells, the bristles will bend, affecting the sampling effect of subsequent cell brush operations. Therefore, this application provides a cell brush that can reduce the bending of the bristles when entering the patient's body and improve the cell sampling effect of the cell brush.
[0031] Reference Figures 1 to 4 This application provides a cell brush comprising a sleeve 1, a telescopic shaft 2, and bristles 21 mounted on the telescopic shaft 2. A through hole 11 is provided on the outer wall of the sleeve 1. The bristles 21 are implanted on the outer wall of the telescopic shaft 2. The telescopic shaft 2 can move and be positioned within the sleeve 1 along its axial direction. The bristles 21 can move with the telescopic shaft 2 inside the sleeve 1. The through hole 11 is located on the movement path of the bristles 21, allowing the bristles 21 to pass through the through hole 11 and exit the sleeve 1.
[0032] As described above, when a cell brush is needed to sample a patient, the telescopic shaft 2 is first moved until the bristles 21 are fully retracted into the cannula 1. At this time, the cell brush is rod-shaped and has a smooth surface, which can be smoothly inserted into the patient's body, such as the mouth, cervix, or urethra, reducing the friction of the bristles 21 on the inner wall of the sampling site. After the cannula 1 of the cell brush is inserted into the predetermined position, the telescopic shaft 2 is pushed to move inside the cannula 1 until the bristles 21 extend out of the cannula 1 to sample the cells. At this time, the medical staff can slightly rotate the entire cell brush so that the bristles 21 can fully contact the side walls of the sampling site. Then, the telescopic shaft 2 is pulled out to reset the bristles 21 into the cannula 1, and then the entire cell brush is pulled out from the sampling site. At this time, the cannula 1 can protect the bristles 21, so that the bristles 21 retain as much tissue as possible from the sampling site, improving the accuracy of the test.
[0033] In summary, designing the brush bristles 21 to extend and retract within and outside the sleeve 1 not only protects the brush bristles 21 before sampling begins, reducing friction between the brush bristles 21 and the inside of the sampling area, thus improving the sampling effect, but also allows the brush bristles 21 to be retracted into the sleeve 1 after sampling, reducing friction between the brush bristles 21 and the inner wall when exiting the sampling area, thereby reducing the risk of scraping away the sampled tissue. Furthermore, the wall of the through hole 11 can limit the movement of the brush bristles 21, fixing their posture after extending out of the sleeve 1, resulting in more thorough sampling.
[0034] Furthermore, refer to Figure 5 The cell brush also includes a drive assembly 3, which includes a mounting bracket 31 and a knob 32. One end of the sleeve 1 is open, and the telescopic shaft 2 is installed inside the sleeve 1 through the opening. The mounting bracket 31 is connected to the opening of the sleeve 1. One end of the knob 32 is threaded to the mounting bracket 31. The telescopic shaft 2 passes through the mounting bracket 31 and is connected to the end of the knob 32 away from the threaded connection. The rotation axis and central axis of the telescopic shaft 2, the knob 32 and the sleeve 1 are all on the same straight line. The telescopic shaft 2 and the knob 32 rotate coaxially. The telescopic shaft 2 can rotate on the mounting bracket 31. Through the threaded connection between the knob 32 and the mounting bracket 31, after rotating the knob 32, the knob 32 can move linearly relative to the mounting bracket 31, thereby pushing the telescopic rod to move.
[0035] With the mounting bracket directly connected to the cannula 1, medical staff can drive the telescopic shaft 2 to move simply by turning the knob 32. This drive design is simple in structure, easy to operate, and suitable for cell sampling in different situations.
[0036] In other embodiments, the drive component 3 may be an electric cylinder connected to the sleeve 1, with the output end of the electric cylinder connected to the telescopic rod, thereby achieving precise movement by electrically controlling the telescopic rod.
[0037] Furthermore, one end of the telescopic shaft 2 inserted into the knob 32 is provided with a locking part 22, which extends in a direction perpendicular to the axial direction of the telescopic shaft 2, and the end of the locking part 22 away from the telescopic shaft 2 is inserted into the knob 32.
[0038] As can be seen from the above, when making the cell brush in this application, the knob 32 is first divided into two parts, then the snap-fit part 22 of the telescopic shaft 2 is inserted into one part of the knob 32, and then the two parts of the knob 32 are fitted together to form a complete whole. At this time, by inserting the snap-fit part 22 into one part of the knob 32, the telescopic shaft 2 and the knob 32 can be integrated into a whole, which provides a good foundation for turning the knob 32 to drive the telescopic shaft 2 and the bristles 21.
[0039] In other embodiments, to facilitate medical staff in separating the telescopic shaft 2 from the cannula 1 after using the cell brush and reapplying the drive assembly 3 to the next cannula 1 and telescopic shaft 2, the cannula 1 can be detachably connected to the mounting frame 31. The telescopic shaft 2 includes a first connecting part and a second connecting part that can be detachably connected to each other. The first connecting part passes through the mounting frame 31 and is connected to the knob 32. The second connecting part is the segment of the telescopic shaft 2 away from the mounting frame 31. The bristles 21 are disposed on the second connecting part. Specifically, the mounting frame 31 and the cannula 1 can be connected by a snap or a thread. The first connecting part and the second connecting part can be connected by internal and external threads. This application does not specifically limit this. As can be seen from the above, after completing one cell sampling, the medical staff separates the cannula 1 from the mounting frame 31 and then separates the first connecting part and the second connecting part. At this time, the second connecting part that exists alone can be taken for testing, while the drive assembly 3 and the first connecting part can continue to be connected to other second connecting parts and cannula 1. After disinfection, the next patient can be sampled, reducing the cost of use.
[0040] To enable medical staff to better rotate the knob 32, a handle 32 is provided on the side of the mounting bracket 31 along the axial direction of the sleeve 1. An active space is formed inside the handle 32, and the knob 32 is installed in the active space. With the above design, when driving the knob 32 to drive the telescopic shaft 2, the medical staff first grips the handle 32 as a fulcrum, and the other hand can easily turn the knob 32 to move the telescopic shaft 2.
[0041] Furthermore, a scale is provided on the handle 32. When medical staff turn the knob 32, they can observe the length position of the knob 32 relative to the scale and determine the moving distance of the telescopic shaft 2, thereby judging whether the bristles 21 have moved into place to extend through the through hole 11.
[0042] As a further embodiment of the above embodiments, the handle 32 and the mounting bracket 31 are integrally formed, and the two ends of the handle 32 are respectively connected to the two ends of the mounting bracket 31 along the axial direction of the sleeve, so that the knob 32 is surrounded in the moving space of the handle 32.
[0043] In order to achieve uniform sampling at all points on the inner wall of the sampling site, refer to Figure 2 Multiple sets of bristles 21 are arranged circumferentially on the telescopic shaft 2, and multiple through holes 11 are opened circumferentially on the sleeve 1. The multiple through holes 11 correspond one-to-one with the multiple sets of bristles 21. The multiple sets of bristles 21 extend out of the sleeve 1 through the corresponding through holes 11. After the cell brush is moved into place, the knob 32 is turned to extend the bristles 21 out of the sleeve 1. Then, by rotating a small angle, the multiple sets of bristles 21 on the telescopic shaft 2 can contact and scrape against the inner wall of the entire sampling site, thereby sampling cells. Compared with a single set of bristles 21, there is no need to make a large angle of rotation, which causes less stimulation to the patient and reduces the patient's pain.
[0044] To further reduce the angle that the cell brush needs to rotate, multiple bristles 21 in the same group are arranged spirally at intervals along the axial direction of the telescopic shaft 2. Each through hole 11 extends along the arrangement direction of multiple bristles 21 in the corresponding group. Through the multiple spirally arranged bristles 21 in each group, the projection density of the bristles 21 on the plane perpendicular to the axial direction of the sleeve 1 is increased. Secondly, the through holes 11 restrict the bristles 21 to sample within a predetermined trajectory, reducing the tangled bristles 21. Moreover, the spiral arrangement of the bristles 21 can adapt to the spiral upward driving mode of the telescopic shaft 2 and better extend out of the through holes 11.
[0045] As a further implementation, the ends of multiple bristles 21 arranged in the same group along the direction from away from to near the mounting bracket 31 are gradually reduced in distance from the tube body of the tube 1 in the direction perpendicular to the axial direction of the tube 1, that is, the length of the bristles 21 gradually becomes shorter. This design can cooperate with the gradually moving telescopic shaft 2, so that the shorter bristles 21 at the front can pass through the through hole 11 and protrude outside the tube 1. That is, the part of the bristles 21 protruding outside the tube 1 is shorter, which can be adapted to narrow sampling sites such as the urethra, reducing the possibility of damage caused by excessive protrusion of the bristles 21 irritating the sampling site.
[0046] As a further embodiment, the sleeve 1 includes a tube body 12 and an insertion part 13 connected to each other. The diameter of the tube body 12 is larger than the diameter of the insertion part 13. A through hole 11 is formed at the insertion part 13. Through the above technical solution, the insertion part 13 that can be inserted into the sampling part is designed to be smaller. After the larger diameter tube body 12 forms a stable support, the smaller diameter insertion part 13 can be more easily inserted into the sampling part in a smaller space.
[0047] As a further implementation, the telescopic shaft 2 is made of nickel-titanium alloy. The nickel-titanium alloy, which has good resilience, allows the bristles 21 to maintain a stable posture to sample the sampling area.
[0048] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.
Claims
1. A cell brush, characterized in that, include: The sleeve (1) has a through hole (11) on its side wall; The telescopic shaft (2) has bristles (21) on its outer wall. The bristles (21) can pass through the through hole (11) and exit the sleeve (1). The telescopic shaft (2) can slide and be positioned in the sleeve (1) along the axial direction of the sleeve (1). The telescopic shaft (2) can move until the bristles (21) extend or retract into the sleeve (1).
2. A cell brush according to claim 1, characterized in that, It also includes a drive assembly (3), which includes a mounting bracket (31) and a knob (32). The mounting bracket (31) is connected to the sleeve (1). One end of the knob (32) is threaded into the mounting bracket (31). The telescopic shaft (2) is connected to the end of the knob (32) away from the threaded connection. The telescopic shaft (2) and the knob (32) rotate coaxially. The telescopic shaft (2) is rotatably connected to the mounting bracket (31).
3. A cell brush according to claim 2, characterized in that, The telescopic shaft (2) is connected to the knob (32) at one end with a locking part (22). The locking part (22) extends in a direction perpendicular to the axial direction of the telescopic shaft (2). The end of the locking part (22) away from the telescopic shaft (2) is inserted into the knob (32).
4. A cell brush according to claim 3, characterized in that, The mounting bracket (31) is provided with a handle (32), and an active space is formed in the handle (32), and the knob (32) is installed in the active space.
5. A cell brush according to claim 4, characterized in that, The handle (32) and the mounting bracket (31) are integrally formed.
6. A cell brush according to claim 2, characterized in that, The telescopic shaft (2) is provided with multiple sets of bristles (21) along the circumferential direction, and the sleeve (1) is provided with multiple through holes (11) along the circumferential direction. The multiple through holes (11) and the multiple sets of bristles (21) correspond one-to-one, and the multiple sets of bristles (21) extend out of the sleeve (1) through the corresponding through holes (11).
7. A cell brush according to claim 6, characterized in that, Multiple bristles (21) of the same group are arranged spirally at intervals along the axial direction of the telescopic shaft (2), and the through holes (11) all extend along the corresponding arrangement direction of the bristles (21).
8. A cell brush according to claim 6, characterized in that, The distance between the ends of the multiple bristles (21) arranged in the same group along the direction from away from to near the mounting bracket (31) and the telescopic shaft (2) gradually decreases.
9. A cell brush according to claim 1, characterized in that, The sleeve (1) includes a tube body (12) and an insertion part (13) connected to each other. The diameter of the tube body (12) is larger than the diameter of the insertion part (13), and the through hole (11) is opened at the insertion part (13).
10. A cell brush according to claim 1, characterized in that, The telescopic shaft (2) is made of nickel-titanium alloy.