Cytology brush capable of being quickly exchanged

Abstract

The utility model relates to the technical field of medical instruments, in particular to a cytobrush capable of being quickly exchanged, which comprises a protective sleeve and an outer tube, and further comprises an end cap, a connecting block, a brush handle, a brush head, a guide wire, a scraping mechanism and a telescopic mechanism, the end cap comprises a sleeve and a cover plate, a first cavity channel is formed between the sleeve and the cover plate, and a second cavity channel is formed in the middle of the connecting block. The scraping mechanism comprises a connecting assembly and a plurality of cleaning assemblies, the telescopic mechanism comprises a strip-shaped groove, a sliding block, a moving assembly and a reset assembly, the first cavity and the second cavity are formed, so that the guide wire and the brush head have the rapid exchange function, and the cytobrush enters the natural cavity of the human body along with the endoscope; the guide wire is firstly used for dredging and expanding a narrow channel, a good instrument penetrating channel is established, at the moment, the guide wire does not need to be withdrawn, the cell brush can be directly arranged for tissue sampling, the time needed for withdrawing and inserting the guide wire and the brush head is shortened, and then the operation time is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a cell brush that can be quickly exchanged. Background Art

[0002] An endoscopic cytology brush is a tool used to collect tissue cell samples during endoscopic examinations. It is commonly used during endoscopic examinations such as gastroscopy and colonoscopy to obtain cell samples from the patient's body. When using an endoscopic cytology brush, the doctor usually inserts the brush head into the working channel of the endoscope and then gently brushes the surface of the tissue where cell sampling is required to collect the cell sample. The cell sample collected on the brush can be used for pathological examination, cytological analysis, or other related laboratory tests to help doctors diagnose or evaluate the patient's condition.

[0003] Existing cell brushes cannot be quickly exchanged. The endoscope has only one clamp channel hole. When the guide wire passes through the clamp channel hole and follows the endoscope lens to the vicinity of the target lesion tissue, the guide wire needs to be withdrawn and the cell brush needs to be inserted for tissue sampling. The lack of rapid exchange function will result in prolonged operation time. To address this problem, a quickly exchangeable cell brush is now provided. Utility Model Content

[0004] The purpose of the utility model is to provide a cell brush that can be quickly exchanged to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A rapidly exchangeable cell brush comprises a sheath tube and an outer tube, wherein the outer tube is fixed to one end of the sheath tube, a passage is opened between the outer tube and the sheath tube, and further comprises an end cap, a connecting block, a brush handle, a brush head, a guide wire, a scraping mechanism, and a telescopic mechanism;

[0007] The end cap includes a sleeve and a cover plate. The sleeve is fixed to the end of the outer tube away from the sheath tube. A first cavity for the brush handle to pass through is formed between the sleeve and the cover plate. The connecting block is fixed to the side of the sleeve away from the cover plate. A second cavity is opened in the middle of the connecting block. The guide wire is inserted into the interior of the second cavity. The end of the brush handle away from the sheath tube is inserted into the interior of the first cavity. The brush head is fixedly installed at the end of the brush handle away from the sheath tube.

[0008] The scraping mechanism includes a connecting component and multiple cleaning components. The connecting component is located between the sleeve and the cover plate. The multiple cleaning components are symmetrically installed on the inner walls of the sleeve and the cover plate. The brush handle is located between the multiple cleaning components.

[0009] The telescopic mechanism includes a strip groove, a slider, a moving assembly and a reset assembly. The strip groove is opened in the middle of the surface of the sheath tube, the strip groove and the channel are connected, the slider is slidably arranged inside the strip groove, the end of the brush handle away from the brush head is connected to the slider, the moving assembly is installed on the slider, and the reset assembly is located between the sheath tube and the moving assembly.

[0010] As a further solution of the present invention: each cleaning assembly includes an annular mounting rod and a plurality of scrapers, the annular mounting rod is fixedly mounted on the inner wall of the sleeve or the cover plate, and the plurality of scrapers are equidistantly fixed on the annular mounting rod.

[0011] As a further solution of the present invention: the multiple annular mounting rods located on the inner wall of the sleeve correspond to the multiple annular mounting rods located on the inner wall of the cover plate one by one, each scraper is made of elastic material, and the brush handle is located between the multiple scrapers.

[0012] As a further solution of the present invention: the connecting assembly includes multiple sockets and multiple rods, the multiple sockets are equidistantly arranged on the side of the sleeve close to the cover plate, and the multiple rods are equidistantly fixed on the side of the cover plate close to the sleeve, each rod is inserted into the inside of a socket, and each rod is interference fit with a socket.

[0013] As a further solution of the present invention: multiple elastic protrusions are symmetrically and equidistantly installed on both ends of the cover plate, and multiple positioning grooves matching the elastic protrusions are symmetrically opened on the inner walls of both ends of the sleeve, and each elastic protrusion is inserted into the inside of a positioning groove.

[0014] As a further solution of the present invention: both ends of the sleeve are provided with bevels on one side close to the elastic protrusion to facilitate the insertion of the elastic protrusion.

[0015] As a further solution of the present invention: the moving assembly includes a sliding sleeve and two handles 2, the sliding sleeve is arranged on the outside of the sheath tube, the sliding sleeve is fixedly connected to the slider, and the two handles 2 are symmetrically installed on both sides of the sliding sleeve.

[0016] As a further solution of the present invention: four guide grooves are symmetrically provided on the inner wall of the strip groove, a guide block is slidably provided inside each guide groove, and each guide block is fixed on the slider.

[0017] As a further solution of the present invention: the reset assembly includes two guide rods, two springs and four fixed blocks, the two guide rods are symmetrically inserted on the sliding sleeve, each guide rod slides on the sliding sleeve, both ends of each guide rod are fixedly connected to a fixed block, each fixed block is fixed on the sheath tube, each spring is sleeved on a guide rod, and both ends of each spring are respectively connected to the sliding sleeve and a fixed block.

[0018] As a further solution of the present invention: a handle for easy grasping is fixedly installed on one end of the sheath tube away from the outer tube.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. The utility model provides a quickly exchangeable cell brush. By setting a first lumen and a second lumen, the guide wire and the brush head have the function of quick exchange. The cell brush enters the natural cavity of the human body with the endoscope. The guide wire is first used to dredge and expand the narrow channel to establish a good instrument passage channel. At this time, there is no need to withdraw the guide wire. The cell brush can be directly arranged for tissue sampling, which is beneficial to shorten the time required for withdrawing and inserting the guide wire and brush head, thereby saving surgical time.

[0021] 2. The utility model provides a quickly exchangeable cell brush. By setting a scraping mechanism, when the telescopic mechanism drives the brush head to move in the natural cavity of the human body, the brush head can move into the first cavity in the middle of the sleeve and the cover plate, and the multiple scrapers inside the first cavity can be used to scrape the tissue sample collected on the brush head, so that the tissue sample can be stored inside the first cavity, avoiding the situation where the tissue specimen on the brush head is contaminated by the brush head entering and exiting multiple times, which affects the detection accuracy.

[0022] 3. The utility model provides a quickly exchangeable cell brush. By setting a connecting component, the sleeve and the cover plate can be quickly connected and disassembled, thereby facilitating the collection of tissue specimens stored in the first cavity after the cell brush is pulled out of the endoscope, and is convenient for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of the present utility model.

[0024] Figure 2 For this utility model Figure 1 Schematic diagram of the enlarged structure of part A.

[0025] Figure 3 For this utility model Figure 2 Schematic diagram of the enlarged structure of part B.

[0026] Figure 4 It is a structural diagram of the end cap of the utility model.

[0027] Figure 5 It is a cross-sectional view of the present invention.

[0028] Figure 6 For this utility model Figure 5 Schematic diagram of the enlarged structure of part C.

[0029] Figure 7 This is a schematic diagram of the disassembled structure of the sleeve and the cover plate in the present invention.

[0030] Figure 8 For this utility model Figure 7 Schematic diagram of the enlarged structure of part D.

[0031] Figure 9 It is a front view of the protective sheath tube in the present utility model.

[0032] Among them: 11. sheath tube; 12. outer tube; 13. end cap; 14. sleeve; 15. cover plate; 16. first cavity; 17. connecting block; 18. second cavity; 19. annular mounting rod; 20. scraper; 21. socket; 22. plug rod; 23. elastic protrusion; 24. positioning groove; 25. toggle area; 26. channel; 27. brush handle; 28. strip groove; 29. slider; 30. guide groove; 31. guide block; 32. handle 2; 33. sliding sleeve; 34. guide rod; 35. spring; 36. fixing block; 37. guide wire; 38. brush head; 39. handle 1; 40. bevel. DETAILED DESCRIPTION

[0033] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0034] The present invention provides the following preferred embodiments:

[0035] Example 1, as Figures 1-9 As shown, a quickly exchangeable cell brush includes a sheath tube 11 and an outer tube 12. The outer tube 12 is fixed to one end of the sheath tube 11. A channel 26 is opened between the outer tube 12 and the sheath tube 11, that is, the channel 26 passes through the outer tube 12 and the sheath tube 11. The brush also includes an end cap 13, a connecting block 17, a brush handle 27, a brush head 38, a guide wire 37, a scraping mechanism, and a telescopic mechanism.

[0036] The end cap 13 includes a sleeve 14 and a cover plate 15. The sleeve 14 is fixed to the end of the outer tube 12 away from the sheath tube 11. A first cavity 16 for the brush handle 27 to pass through is formed between the sleeve 14 and the cover plate 15. A connecting block 17 is fixed to the side of the sleeve 14 away from the cover plate 15. A second cavity 18 is formed in the middle of the connecting block 17. A guide wire 37 is inserted into the interior of the second cavity 18. The end of the brush handle 27 away from the sheath tube 11 is inserted into the interior of the first cavity 16. The brush head 38 is fixedly mounted on the end of the brush handle 27 away from the sheath tube 11.

[0037] When in use, one end of the guide wire 37 is inserted into the interior of the second lumen 18, so that the entire instrument is inserted into the endoscope channel along the guide wire 37. The cell brush follows the endoscope into the natural cavity of the human body. The guide wire 37 is first used to dredge and expand the narrow channel to establish a good instrument passage through the channel. At this time, there is no need to withdraw the guide wire 37, and the cell brush is directly arranged for tissue sampling;

[0038] That is, by providing the first lumen 16 and the second lumen 18, the guide wire 37 and the brush head 38 have the function of rapid exchange. The cell brush enters the natural cavity of the human body along with the endoscope, and the guide wire 37 is first used to dredge and expand the narrow channel to establish a good instrument passage channel. At this time, there is no need to withdraw the guide wire 37, and the cell brush can be directly arranged for tissue sampling, which is conducive to shortening the time required for withdrawing and inserting the guide wire 37 and the brush head 38, thereby helping to save surgical time.

[0039] The scraping mechanism includes a connecting assembly and multiple cleaning assemblies. The connecting assembly is located between the sleeve 14 and the cover plate 15. The multiple cleaning assemblies are symmetrically mounted on the inner walls of the sleeve 14 and the cover plate 15. The brush handle 27 is located between the multiple cleaning assemblies. The cleaning assembly can scrape the tissue sample collected on the brush head 38 to achieve the storage of the tissue sample. The connecting assembly can quickly connect and disassemble the sleeve 14 and the cover plate 15, thereby facilitating the collection of tissue specimens stored in the first lumen 16 after the cell brush is removed from the endoscope, making it easy to use.

[0040] The telescopic mechanism includes a strip groove 28, a slider 29, a moving assembly and a reset assembly. The strip groove 28 is opened in the middle of the surface of the sheath tube 11. The strip groove 28 is connected to the channel 26. The slider 29 is slidably arranged inside the strip groove 28. The end of the brush handle 27 away from the brush head 38 is connected to the slider 29. When the slider 29 slides inside the strip groove 28, the brush head 38 can be driven to move by the brush handle 27, so that the brush head 38 can continuously move in and out of the first cavity 16. When the brush head 38 moves out of the first cavity 16, the brush head 38 contacts the human tissue and collects the sample tissue. When the brush head 38 moves into the first cavity 16, the cleaning assembly can be used to collect the collected sample. The moving assembly is installed on the slider 29. The moving assembly facilitates the slider 29 to slide inside the strip groove 28. The reset assembly is located between the sheath tube 11 and the moving assembly. The reset assembly can quickly drive the slider 29 to reset, so that the slider 29 can better move back and forth inside the strip groove 28.

[0041] By providing a scraping mechanism, when the telescopic mechanism drives the brush head 38 to move in the natural cavity of the human body, the brush head 38 can move into the first cavity 16 in the middle of the sleeve 14 and the cover plate 15, and the multiple scrapers 20 inside the first cavity 16 can be used to scrape the tissue sample collected on the brush head 38, so that the tissue sample can be stored inside the first cavity 16, avoiding the situation where the tissue specimen on the brush head 38 is contaminated by the brush head 38 repeatedly entering and exiting, thereby affecting the detection accuracy;.

[0042] like Figures 1-9 As shown, each cleaning assembly includes an annular mounting rod 19 and a plurality of scrapers 20. The annular mounting rod 19 is fixedly mounted on the inner wall of the sleeve 14 or the cover plate 15. The plurality of scrapers 20 are equidistantly fixed on the annular mounting rod 19. Each scraper 20 is in an arc shape that is bent toward the side close to the brush handle 27.

[0043] like Figures 1-9 As shown, the multiple annular mounting rods 19 located on the inner wall of the sleeve 14 and the multiple annular mounting rods 19 located on the inner wall of the cover plate 15 correspond one to one, so that the two corresponding annular mounting rods 19 can form a circle, and then the multiple scrapers 20 on the corresponding two annular mounting rods 19 can wrap the brush handle 27, which is convenient for subsequent uniform scraping and cleaning of the tissue specimens on the brush head 38. Each scraper 20 is made of elastic material, and the brush handle 27 is located between the multiple scrapers 20. During use, when the brush head 38 moves into the first cavity 16, the scraper 20 is arc-shaped, so that the brush head 38 can quickly enter the first cavity 16. When the brush head 38 moves in the opposite direction and moves out of the first cavity 16, the arc-shaped scraper 20 can be used to scrape the tissue specimens on the brush head 38, thereby realizing the collection of tissue specimens, avoiding the situation where the tissue specimens on the brush head 38 are contaminated due to multiple entry and exit of the brush head 38, thereby affecting the detection accuracy.

[0044] like Figures 1-9 As shown, the connecting assembly includes a plurality of sockets 21 and a plurality of rods 22. The plurality of sockets 21 are equidistantly arranged on the side of the sleeve 14 close to the cover plate 15, and the plurality of rods 22 are equidistantly fixed on the side of the cover plate 15 close to the sleeve 14. Each rod 22 is inserted into the inside of a socket 21, and each rod 22 is interference fit with a socket 21. When in use, the connection and fixation between the sleeve 14 and the cover plate 15 can be achieved by sequentially inserting the plurality of rods 22 on the cover plate 15 into the plurality of sockets 21 on the sleeve 14.

[0045] like Figures 1-9As shown, multiple elastic protrusions 23 are symmetrically and equidistantly installed at both ends of the cover plate 15, and multiple positioning grooves 24 that cooperate with the elastic protrusions 23 are symmetrically opened on the inner walls of both ends of the sleeve 14. Each elastic protrusion 23 is inserted into the inside of a positioning groove 24. When the cover plate 15 is fixed on the sleeve 14, the elastic protrusion 23 can slide into the inside of the positioning groove 24, which can further improve the connection and fixing effect between the sleeve 14 and the cover plate 15.

[0046] like Figures 1-9 As shown, both ends of the sleeve 14 are provided with bevels 40 on one side close to the elastic protrusions 23 to facilitate the insertion of the elastic protrusions 23. The setting of the bevels 40 facilitates the elastic protrusions 23 at both ends of the cover plate 15 to be inserted into the interior of the positioning groove 24 more quickly, making it easier to use.

[0047] Specifically, the surfaces of the sleeve 14 and the cover plate 15 are both provided with a dialing area 25 for easy insertion and removal.

[0048] like Figures 1-9 As shown, the moving assembly includes a sliding sleeve 33 and two handles 2 32. The sliding sleeve 33 is sleeved on the outside of the sheath tube 11. The sliding sleeve 33 is fixedly connected to the slider 29. The two handles 2 32 are symmetrically installed on both sides of the sliding sleeve 33. During use, when the slider 29 needs to be moved, the sliding sleeve 33 can be driven to move on the outside of the sheath tube 11 by pulling the two handles 2 32. At this time, the sliding sleeve 33 can drive the slider 29 to slide inside the strip groove 28, thereby realizing the movement of the brush head 38, and then realizing the sampling of tissue samples.

[0049] like Figures 1-9 As shown, four guide grooves 30 are symmetrically provided on the inner wall of the strip groove 28, and a guide block 31 is slidably provided inside each guide groove 30. Each guide block 31 is fixed on the slider 29. When the slider 29 slides back and forth inside the strip groove 28, the guide block 31 can slide inside the guide groove 30, playing a guiding and limiting role, which is beneficial to improving the stability of the slider 29, and thus increasing the stability of the cell brush during use.

[0050] like Figures 1-9 As shown, the reset assembly includes two guide rods 34, two springs 35 and four fixed blocks 36. The two guide rods 34 are symmetrically inserted into the sliding sleeve 33, and each guide rod 34 slides on the sliding sleeve 33. Both ends of each guide rod 34 are fixedly connected to a fixed block 36, and each fixed block 36 is fixed to the sheath tube 11. Each spring 35 is sleeved on a guide rod 34, and both ends of each spring 35 are respectively connected to the sliding sleeve 33 and a fixed block 36.

[0051] It should be noted here that in the initial state, reference Figure 9The slider 29 is located near the middle of the strip groove 28, where each spring 35 is in a natural state, and the brush head 38 is located outside the first cavity 16. During use, after the brush head 38 collects a tissue sample, the handle 2 32 is pulled, and the spring 35 is stretched. After the scraper 20 scrapes the sample on the brush head 38, the spring 35 can be used to quickly move the brush head 38 out of the first cavity 16, which is more labor-saving and convenient to use.

[0052] like Figures 1-9 As shown, a handle 39 for easy grasping is fixedly installed on one end of the sheath tube 11 away from the outer tube 12. The setting of the handle 39 makes it convenient for the user to hold the cell brush tightly and operate it conveniently.

[0053] The beneficial effects of the present invention are specifically embodied in that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A rapidly exchangeable cell brush comprising a sheath tube (11) and an outer tube (12), wherein the outer tube (12) is fixed to one end of the sheath tube (11), and a channel (26) is provided between the outer tube (12) and the sheath tube (11), characterized in that: It also includes an end cap (13), a connecting block (17), a brush handle (27), a brush head (38), a guide wire (37), a scraping mechanism and a telescopic mechanism; The end cap (13) comprises a sleeve (14) and a cover plate (15), wherein the sleeve (14) is fixed to one end of the outer tube (12) away from the protective tube (11), and a first cavity (16) for the brush handle (27) to pass through is formed between the sleeve (14) and the cover plate (15), a connecting block (17) is fixed to the side of the sleeve (14) away from the cover plate (15), a second cavity (18) is opened in the middle of the connecting block (17), a guide wire (37) is inserted into the interior of the second cavity (18), an end of the brush handle (27) away from the protective tube (11) is inserted into the interior of the first cavity (16), and a brush head (38) is fixedly mounted on the end of the brush handle (27) away from the protective tube (11); The scraping mechanism comprises a connecting assembly and a plurality of cleaning assemblies, wherein the connecting assembly is located between the sleeve (14) and the cover plate (15), the plurality of cleaning assemblies are symmetrically mounted on the inner walls of the sleeve (14) and the cover plate (15), and the brush handle (27) is located between the plurality of cleaning assemblies; The telescopic mechanism comprises a strip groove (28), a slider (29), a moving assembly and a reset assembly. The strip groove (28) is opened in the middle of the surface of the protective tube (11), the strip groove (28) is communicated with the channel (26), the slider (29) is slidably arranged inside the strip groove (28), one end of the brush handle (27) away from the brush head (38) is connected to the slider (29), the moving assembly is installed on the slider (29), and the reset assembly is located between the protective tube (11) and the moving assembly.

2. A rapidly exchangeable cell brush according to claim 1, characterized in that: Each cleaning assembly comprises an annular mounting rod (19) and a plurality of scrapers (20). The annular mounting rod (19) is fixedly mounted on the inner wall of the sleeve (14) or the cover plate (15). The plurality of scrapers (20) are equidistantly fixed on the annular mounting rod (19).

3. A rapidly exchangeable cell brush according to claim 2, characterized in that: A plurality of annular mounting rods (19) located on the inner wall of the sleeve (14) and a plurality of annular mounting rods (19) located on the inner wall of the cover plate (15) correspond one to one, each scraper (20) is made of elastic material, and the brush handle (27) is located between the plurality of scrapers (20).

4. A rapidly exchangeable cell brush according to claim 3, characterized in that: The connecting assembly comprises a plurality of jacks (21) and a plurality of insertion rods (22). The plurality of jacks (21) are equidistantly arranged on a side of the sleeve (14) close to the cover plate (15). The plurality of insertion rods (22) are equidistantly fixed on a side of the cover plate (15) close to the sleeve (14). Each insertion rod (22) is inserted into a jack (21), and each insertion rod (22) is interference-fitted with a jack (21).

5. The rapidly exchangeable cell brush according to claim 4, characterized in that: A plurality of elastic protrusions (23) are symmetrically and equidistantly installed at both ends of the cover plate (15); a plurality of positioning grooves (24) matching the elastic protrusions (23) are symmetrically opened on the inner walls of both ends of the sleeve (14); and each elastic protrusion (23) is inserted into the interior of a positioning groove (24).

6. The rapidly exchangeable cell brush according to claim 5, characterized in that: Both ends of the sleeve (14) are provided with bevels (40) on one side close to the elastic protrusion (23) for facilitating the insertion of the elastic protrusion (23).

7. The rapidly exchangeable cell brush according to claim 6, characterized in that: The moving assembly comprises a sliding sleeve (33) and two handles (32). The sliding sleeve (33) is sleeved on the outside of the sheath tube (11). The sliding sleeve (33) is fixedly connected to the slider (29). The two handles (32) are symmetrically installed on both sides of the sliding sleeve (33).

8. The rapidly exchangeable cell brush according to claim 7, characterized in that: Four guide grooves (30) are symmetrically provided on the inner wall of the strip groove (28), a guide block (31) is slidably provided inside each guide groove (30), and each guide block (31) is fixed on the slider (29).

9. The rapidly exchangeable cell brush according to claim 8, characterized in that: The reset assembly comprises two guide rods (34), two springs (35) and four fixed blocks (36). The two guide rods (34) are symmetrically inserted on the sliding sleeve (33). Each guide rod (34) slides on the sliding sleeve (33). Both ends of each guide rod (34) are fixedly connected to a fixed block (36). Each fixed block (36) is fixed on the sheath tube (11). Each spring (35) is sleeved on a guide rod (34). Both ends of each spring (35) are respectively connected to the sliding sleeve (33) and a fixed block (36).

10. The rapidly exchangeable cell brush according to claim 9, characterized in that: A handle (39) for easy grasping is fixedly mounted on one end of the sheath tube (11) away from the outer tube (12).

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