Push-pull cytology brush for minimally invasive surgery
By designing a push-pull cell brush, using a separation rod to expand the sampling range and connecting airbags for fixation, the problem of insufficient brush bristle contact in existing technologies is solved, achieving sufficient sampling in a single session and improving sampling efficiency, while reducing tissue damage and process instability.
Patent Information
- Application Number
- CN202520961702.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-15
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-05-15
AI Technical Summary
In the current cell brush sampling process, the bristles do not make sufficient contact with the area of the patient to be sampled, resulting in insufficient sampled tissue. This requires repeated sampling, which reduces sampling efficiency and increases patient discomfort.
A push-pull cell brush is designed, including a push-pull ring, a connecting wire, a grip, a guide tube, and a sampling assembly. The sampling brush head is made of an elastic material. Adjacent sampling brush heads are separated by a separating rod to expand the sampling range. The guide tube is fixed in the body by a connecting airbag to ensure that the sampling brush head makes full contact with the tissue.
It achieves sufficient sampling in a single step, improves sampling efficiency, reduces the possibility of tissue damage, and ensures the stability of the sampling process by using an airbag for fixation.
Smart Images
Figure CN224671538U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of medical devices, and in particular to a push-pull cell brush for minimally invasive surgery. Background Technology
[0002] Endoscopic cell brushing is a detection method that uses endoscopic visualization to repeatedly brush the surface of lesions to obtain diseased cells. It can brush mucosal cells from lesions over a large area, complementing pathological examination and reducing the rate of missed diagnoses. It is of great value for disease diagnosis, especially for the initial screening of tumors.
[0003] Currently, the device includes a grip, a guide tube, a connecting wire, and a push-pull ring. The grip is connected to one end of the guide tube, and the connecting wire slides through the guide tube. The length of the connecting wire is greater than the length of the guide tube. One end of the connecting wire extends out of the grip and connects to the push-pull ring, while the other end is equipped with sampling bristles. During sampling, the doctor inserts the guide tube into the patient's body through the endoscope at the sampling location. Then, the push-pull ring is pushed, allowing one end of the connecting wire to extend into the patient's body. The sampling bristles contact the tissue of the lesion, and tissue cells are obtained by brushing. After sampling, the push-pull ring is pulled to retract the end of the connecting wire with the sampling bristles back into the guide tube. Finally, the entire guide tube is removed, completing the extraction.
[0004] Regarding the aforementioned technologies, the inventors believe that during the sampling process of the cell brush, the surface of the bristles may not be able to fully contact the area of the patient requiring sampling, resulting in insufficient tissue sampling. This necessitates repeated sampling, leading to reduced sampling efficiency and increased patient discomfort. Utility Model Content
[0005] In order to achieve sufficient sampling in a single cell brush and improve sampling efficiency, this application provides a push-pull cell brush for minimally invasive surgery.
[0006] The push-pull cell brush for minimally invasive surgery provided in this application adopts the following technical solution: A push-pull cell brush for minimally invasive surgery includes a push-pull ring, a connecting line, a grip, and a guide tube. The push-pull ring is connected to one end of the connecting line, and the grip is connected to one end of the guide tube. The connecting line passes through the grip and extends into the guide tube. The length of the connecting line is greater than the length of the guide tube. The brush also includes a sampling assembly, which includes a sampling brush head, sampling bristles, and a separating element. Several sampling brush heads are arranged at the end of the connecting line away from the push-pull ring. The sampling brush head is made of an elastic material, and in its natural state, the sampling brush heads are collinearly aligned and fitted together. The sampling bristles are located on the sampling brush head. The separating element is located at the end of the guide tube away from the grip. The separating element includes a separating ring and separating rods. The separating ring is located at the end of the guide tube, and several separating rods are arranged along the diameter of the separating ring.
[0007] By employing the above technical solution, the guiding tube is placed at a specific location within the patient's body using an endoscope. Pushing the push-pull ring moves the connecting wire into the patient's body, and a separating rod is inserted between adjacent sampling brush heads, separating them. Several adjacent sampling brush heads unfold and extend into the patient's body under the action of the separating rod. The unfolded sampling brush heads expand the sampling range of the tissue, helping to collect a sufficient amount of tissue cells. Through the coordinated operation of the push-pull ring, connecting wire, grip, guiding tube, and sampling components, the system achieves sufficient single-shot sampling of the cell brush and improves sampling efficiency.
[0008] Optionally, a plurality of the sampling brush heads are arranged circumferentially at the ends of the connecting line, and the ends of the plurality of sampling brush heads away from the connecting line together form a hemispherical end.
[0009] By adopting the above technical solution, since the ends of several sampling brush heads away from the connecting line together form a hemispherical end, the possibility of the ends of the sampling brush heads causing damage to the patient's internal tissues during the sampling process is reduced.
[0010] Optionally, the sampling assembly further includes a mounting ring, a mounting rod, a sliding rod, and a limiting block. The mounting ring is disposed on the side of the separating ring near the push-pull ring, and the mounting ring slides against the inner wall of the guide hose. The mounting rod is connected between the connecting line and the mounting ring. One end of the sliding rod is connected to the separating ring, and the other end passes through the mounting ring and slides against it. The limiting block is connected to the end of the sliding rod away from the separating ring. The intersection of several separating rods corresponds to the center contact position of several sampling brush heads. A limiting ring is connected to the inner ring wall of the guide hose away from the grip.
[0011] By adopting the above technical solution, as the connecting line approaches the limiting ring, the separating ring contacts the limiting ring, and the separating rod inserts into the joint of adjacent sampling brush heads, separating the adjacent sampling brush heads. At this time, the sliding rod slides relative to the mounting ring, limiting and guiding the sampling brush heads and the connecting line, so that the gap between the sampling brush heads always corresponds to the position of the separating rod, making it easier for the separating rod to separate the sampling brush heads.
[0012] Optionally, a return spring is fitted on the slide rod, with one end of the return spring in contact with the separation tube and the other end connected to the mounting ring. In its natural state, the end of the sampling brush head away from the connecting line is spaced apart from the separation ring.
[0013] By adopting the above technical solution, the reset spring facilitates the reset of the mounting ring and the separation ring, so that when the guide hose is pulled out, several sampling brush heads can be retracted and returned to the guide hose.
[0014] Optionally, a connecting rope is connected to the slide rod, one end of which extends out of the end of the guide hose where the grip is located. A hook is provided at one end of the connecting rope on the guide hose. When the hook is hung on the push-pull ring, the separation rod and the end of the connecting line connected to the sampling brush head abut against each other.
[0015] By adopting the above technical solution, when the sampling brush head is pushed out of the guide tube, the hook is hung on the push-pull ring, thereby fixing the relative position of the separation ring and the sampling brush head.
[0016] Optionally, the separating rod has a separating ridge on the side near the connecting line, and the ends of several sampling brush heads near the central axis of the connecting line have separating chamfers.
[0017] By adopting the above technical solution, the setting of the separation edge and separation chamfer facilitates the smooth separation of several sampling brush heads, allowing several sampling brush heads to unfold smoothly.
[0018] Optionally, the guide hose is provided with an annular connecting airbag on its outside, and an air supply tube is provided in the inner cavity of the guide hose. One end of the air supply tube is connected to the connecting airbag, and the other end passes through the grip and is connected to an air supply head.
[0019] By adopting the above technical solution, after the guiding tubing is placed in the appropriate position, air is inflated into the connecting airbag through the air inlet head and air inlet tube. The connecting airbag expands and fixes the guiding tubing in a specific position in the patient's body, reducing the possibility of the guiding tubing moving during the sampling process.
[0020] Optionally, the grip base includes two parallel grip plates and a connecting tube connecting the two. The connecting line passes through the connecting tube, and a guide tube is connected to one end of the connecting tube away from the push-pull ring. The guide tube is connected to one end of the guide hose.
[0021] By adopting the above technical solution, the guide tube provides support for the guide hose, reducing the possibility of bending and damage at the connection between the guide hose and the grip.
[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. Through the cooperation of the push-pull ring, connecting line, grip, guide tube and sampling components, it can achieve full sampling of cell brush in one go and improve sampling efficiency; 2. The connecting balloon secures the guiding tubing to a specific location within the patient's body, reducing the likelihood of the tubing shifting during sampling; 3. The separation edge and separation chamfer facilitate the smooth separation of several sampling brush heads, allowing them to unfold smoothly. Attached Figure Description
[0023] Figure 1 This is a schematic diagram illustrating the structure of a push-pull cell brush for minimally invasive surgery, as described in the embodiments of this application.
[0024] Figure 2 This is a partial cross-sectional view used to illustrate the grip base in the embodiments of this application.
[0025] Figure 3 This is a partial cross-sectional view used to illustrate the sampling component in the embodiments of this application.
[0026] Figure 4 yes Figure 3 Enlarged view of part A in the middle.
[0027] Explanation of reference numerals in the attached diagram: 1. Push-pull ring; 2. Connecting line; 3. Grip base; 31. Grip plate; 32. Connecting tube; 33. Guide tube; 4. Guide hose; 5. Sampling assembly; 51. Sampling brush head; 52. Sampling bristles; 53. Separation ring; 54. Separation rod; 55. Slide rod; 56. Limiting block; 57. Mounting ring; 58. Mounting rod; 59. Return spring; 6. Limiting ring; 7. Separation ridge; 8. Separation chamfer; 9. Connecting rope; 10. Hook; 11. Connecting airbag; 12. Gas delivery tube; 13. Gas delivery head. Detailed Implementation
[0028] The following is in conjunction with the appendix Figure 1-4This application will be further described in detail below. Embodiments of this application provide a push-pull cell brush for minimally invasive surgery, which achieves sufficient single-pass sampling of the cell brush and improves sampling efficiency.
[0029] Reference Figure 1-3 A push-pull cell brush for minimally invasive surgery includes a push-pull ring 1, a connecting wire 2, a grip 3, a guide tube 4, and a sampling component 5. The grip 3 includes a grip plate 31, a connecting tube 32, and a guide tube 33. Two grip plates 31 are ring plates arranged in parallel, and the connecting tube 32 is perpendicularly connected between the two grip plates 31. The guide tube 33 is connected to one end of the connecting tube 32, and the end of the guide tube 33 away from the grip plate 31 is connected to one end of the guide tube 4. The connecting wire 2, made of flexible metal wire, slides through the guide tube 4. The length of the connecting wire 2 is greater than the length of the guide tube 4, and one end of the connecting wire 2 extends out of the grip 3 and connects to the push-pull ring 1.
[0030] Reference Figure 3 and Figure 4 The sampling assembly 5 includes a sampling brush head 51, sampling bristles 52, a separation ring 53, a separation rod 54, a slide rod 55, a limiting block 56, a mounting ring 57, a mounting rod 58, and a return spring 59. Several sampling brush heads 51 are collinearly and closely attached to the end of the connecting line 2 away from the grip 3, and these brush heads 51 are arranged circumferentially at the end of the connecting line 2. The brush heads 51 together form a cylindrical sampling column, with sampling bristles 52 disposed on the brush heads 51. The end of the sampling column away from the connecting line 2 is hemispherically shaped. Two mounting rods 58 are connected to the connecting line 2, and are arranged along the radius of the guide hose 4. The end of the mounting rod 58 away from the connecting line 2 is connected to the mounting ring 57, which is slidably attached to the inner wall of the guide hose 4. The separating ring 53 is arranged parallel to the mounting ring 57 on the side away from the grip 3. The separating ring 53 is fitted against the inner wall of the guide hose 4. Two separating rods 54 are arranged inside the separating ring 53 along its diameter. Both the mounting ring 57 and the separating ring 53 are slidably disposed with the guide hose 4. A limit ring 6 is connected to the inner wall of the guide hose 4 at the end away from the grip.
[0031] Reference Figure 3 and Figure 4Two sliding rods 55 are vertically connected to the side of the separating ring 53 near the mounting ring 57. The sliding rods 55 pass through the mounting ring 57 and are slidably connected to it. The end of the sliding rod 55 away from the separating ring 53 is connected to the limiting block 56. A return spring 59 is sleeved on each sliding rod 55. One end of the return spring 59 abuts against the mounting ring 57, and the other end abuts against the separating ring 53. In its natural state, the separating ring 53 is spaced apart from the end of the sampling brush head 51 under the action of the return spring 59. The intersection of several separating rods 54 corresponds to the contact position of several sampling brush heads 51. A separating ridge 7 is provided on the side of the separating rod 54 near the sampling brush head 51, and a separating chamfer 8 is provided on the side of the end of the sampling brush head 51 near the central axis of the connecting line 2.
[0032] Reference Figure 2 and Figure 3 One of the sliding rods 55 is connected to a connecting rope 9. The connecting rope 9 extends through the guide hose 4 and the grip 3 and is connected to a hook 10. When the hook 10 is hooked on the push-pull ring 1, the separating rod 54 abuts against the end of the connecting line 2 away from the push-pull ring 1. A connecting airbag 11 is provided on the outer tube section of the guide hose 4 near the sampling brush head 51. An air delivery tube 12 is provided in the guide hose 4. One end of the air delivery tube 12 is connected to the connecting airbag 11, and the other end extends through the connecting tube 32 and is connected to the air delivery head 13.
[0033] Reference Figure 1 , Figure 3 and Figure 4 During sampling, the operator holds the grip 3 and places the guide tube 4 inside the patient's body at the sampling location through the endoscope. Pushing the grip ring inward moves the end of the connecting line 2 closer to the opening of the guide tube 4. The separating ring 53 moves accordingly until it abuts against the limiting ring 6. At this point, the sliding rod 55 and the mounting ring 57 move relative to each other, compressing the return spring 59 and accumulating elastic potential energy. The separating rod 54 contacts and separates the sampling brush head 51. Several sampling brush heads 51 extend from the guide tube 4 and unfold, allowing the sampling bristles 52 to fully contact the patient's internal tissues and achieve sampling, thus improving the accuracy and efficiency of sampling.
[0034] Reference Figure 2-4During sampling, the hook 10 is attached to the push-pull ring 1 to prevent the sampling brush head 51 from retracting back into the guide tube 4 and gathering together due to its own elasticity and the return spring 59. The mounting ring 57 and the slide bar 55 limit and guide the movement of the split ring, reducing the possibility that the split bar cannot be aligned with the sampling brush head 51. The separation ridge 7 and the separation chamfer 8 facilitate the smooth entry of the separation rod 54 between two adjacent sampling brush heads 51 to separate them. During sampling, gas is injected into the connecting air bag 11 through the gas inlet head 13 and the gas inlet tube 12, so that the guide tube 4 can be stably fixed in a specific position in the patient's body, achieving precise sampling of the affected tissue.
[0035] Reference Figure 2 and Figure 3 After sampling is completed, the connecting airbag 11 is deflated through the gas delivery tube 12, and the hook 10 is removed from the push-pull ring 1. The mounting ring 57 is reset by the action of the return spring 59, and the sampling brush head 51 reassembles and retracts into the guide tube 4, completing the collection of the sampled tissue. The guide tube 4 is then removed from the patient's body. The guide tube 33 provides support for the guide tube 4, reducing the possibility of bending of the guide tube 4 and the connecting line 2 passing through it during the sampling process.
[0036] The implementation principle of a push-pull cell brush for minimally invasive surgery in this embodiment is as follows: During sampling, the guide tube 4 is placed inside the patient's body. The grip 3 is pushed inward, and the connecting line 2 moves towards the opening end of the guide tube 4. The separation ring 53 moves accordingly, and the separation rod 54 contacts and separates the sampling brush head 51. Several sampling brush heads 51 unfold, and the sampling bristles 52 fully contact the patient's tissues to achieve sampling. During sampling, gas is injected into the connecting air bag 11 through the gas inlet head 13 and the gas inlet tube 12, fixing the guide tube 4 at a specific position inside the patient's body, achieving precise sampling of the affected tissue.
[0037] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A push-pull cell brush for minimally invasive surgery, comprising a push-pull ring (1), a connecting line (2), a grip (3), and a guide tube (4), wherein the push-pull ring (1) is connected to one end of the connecting line (2), the grip (3) is connected to one end of the guide tube (4), the connecting line (2) passes through the grip (3) and extends into the guide tube (4), and the length of the connecting line (2) is greater than the length of the guide tube (4), characterized in that: It also includes a sampling component (5), which includes a sampling brush head (51), sampling bristles (52) and a separator. The sampling brush head (51) has several bristles at one end of the connecting line (2) away from the push-pull ring (1). The sampling brush head (51) is made of elastic material. In its natural state, several sampling brush heads (51) are aligned and collinear with each other. The sampling bristles (52) are disposed on the sampling brush head (51). The separator is disposed at the end of the guide hose (4) away from the grip (3). The separator includes a separator ring (53) and a separator rod (54). The separator ring (53) is disposed at the end of the guide hose (4). The separator rod (54) has several branches arranged along its diameter in the separator ring (53).
2. The push-pull cell brush for minimally invasive surgery according to claim 1, characterized in that: Several sampling brush heads (51) are arranged circumferentially at the ends of the connecting line (2), and the ends of the several sampling brush heads (51) away from the connecting line (2) together form a hemispherical end.
3. A push-pull cell brush for minimally invasive surgery according to claim 2, characterized in that: The sampling assembly (5) further includes a mounting ring (57), a mounting rod (58), a sliding rod (55), and a limiting block (56). The mounting ring (57) is located on the side of the separating ring (53) near the push-pull ring (1). The mounting ring (57) slides against the inner wall of the guide hose (4). The mounting rod (58) is connected between the connecting line (2) and the mounting ring (57). One end of the sliding rod (55) is connected to the separating ring (53), and the other end passes through the mounting ring (57) and slides against it. The limiting block (56) is connected to the end of the sliding rod (55) away from the separating ring (53). The intersection of several separating rods (54) is corresponding to the center contact position of several sampling brush heads (51). A limiting ring (6) is connected to the inner ring wall of the guide hose (4) away from the grip (3).
4. A push-pull cell brush for minimally invasive surgery according to claim 3, characterized in that: A reset spring (59) is sleeved on the slide bar (55). One end of the reset spring (59) is in contact with the separation ring (53), and the other end is connected to the mounting ring (57). In its natural state, the end of the sampling brush head (51) away from the connecting line (2) is spaced apart from the separation ring (53).
5. A push-pull cell brush for minimally invasive surgery according to claim 4, characterized in that: A connecting rope (9) is connected to the slide rod (55). One end of the connecting rope (9) extends out of the end of the guide hose (4) where the grip seat (3) is located. A hook (10) is located at one end of the connecting rope (9) on the guide hose (4). When the hook (10) is hung on the push-pull ring (1), the separating rod (54) and the end of the connecting line (2) connected to the sampling brush head (51) abut against each other.
6. A push-pull cell brush for minimally invasive surgery according to claim 3, characterized in that: The separating rod (54) has a separating ridge (7) on the side near the connecting line (2), and the sampling brush head (51) has a separating chamfer (8) at the end near the central axis of the connecting line (2).
7. A push-pull cell brush for minimally invasive surgery according to claim 1, characterized in that: The guide hose (4) is provided with an annular connecting airbag (11) on its outside. An air supply tube (12) is provided in the inner cavity of the guide hose (4). One end of the air supply tube (12) is connected to the connecting airbag (11), and the other end passes through the grip (3) and is connected to an air supply head (13).
8. A push-pull cell brush for minimally invasive surgery according to claim 1, characterized in that: The grip base (3) includes two parallel grip plates (31) and a connecting tube (32) connecting the two. The connecting line (2) passes through the connecting tube (32). A guide tube (33) is connected to one end of the connecting tube (32) away from the push-pull ring (1). The guide tube (33) is connected to one end of the guide hose (4).