Cannula cytobrush for obtaining cervical fetus exfoliated cells
By optimizing the structural design of the cervical fetal cell brush and adopting a combination of threaded connections and soft and hard tubes, the problems of insufficient cell acquisition and inconvenient operation in the existing technology have been solved, achieving efficient and safe fetal cell acquisition and improving the reliability of prenatal diagnosis.
Patent Information
- Application Number
- CN202520318163.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-02-26
AI Technical Summary
Existing methods for obtaining fetal exfoliated cervical cells suffer from problems such as insufficient cell count, poor ease of operation, difficulty in ensuring safety, and insufficient protection of fetal cells. Furthermore, the structural design of the cell brush is unreasonable and cannot meet the needs of efficient cell collection.
A cannulated cell brush was designed, comprising a support plate, a guide sleeve, a sleeve rod, a brush handle, and a brush head. The connection between the brush head and the brush handle was optimized through structures such as threaded connection, spring buffer, and positioning ring. Combined with the design of soft and hard tubes, operational stability and safety were ensured.
It improves the efficiency of obtaining fetal exfoliated cells, enhances operational safety, reduces the risk of damage to the cervix and fetus, simplifies the operation process, reduces reliance on operator skills, and improves sampling success rate and sample purity.
Smart Images
Figure CN223746405U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to medical equipment technical field, specifically, relate to a sleeve cell brush of acquisition cervical fetus exfoliative cell. BACKGROUND
[0002] In the field of prenatal diagnosis, obtaining cervical fetal exfoliative cells is crucial for early detection of fetal genetic information. Currently, common cervical sampling methods such as mucus aspiration, intra-cervical lavage and cervical brushing have many problems. Although cervical swabs are safe, the number of fetal cells obtained is insufficient; although intra-cervical and intra-uterine lavage techniques are relatively effective in extracting fetal cells at 5 weeks of gestation, their success rates are affected by factors such as gestational age, operator skill, sample characteristics and detection method sensitivity, and the concentration of trophoblast cells obtained by intra-uterine lavage is low, making safety difficult to guarantee. In addition, these methods also have deficiencies in terms of operational convenience, cell acquisition rate and protection of fetal cells. The existing cell brush is not reasonable in structural design, especially the connection mode between the components, which cannot meet the demand of efficient and safe acquisition of fetal exfoliative cells, so an improved sleeve cell brush for obtaining cervical fetal exfoliative cells is urgently needed. SUMMARY
[0003] In order to make up for the above shortcomings, the utility model provides a sleeve cell brush for obtaining cervical fetal exfoliative cells, aiming at improving the unreasonable structure design of the existing cell brush, especially the connection mode between the components, which cannot meet the demand of high efficiency.
[0004] The utility model is realized as follows: a sleeve cell brush for obtaining cervical fetal exfoliative cells, comprising a support plate and a guide sleeve, the support plate is fixedly installed with a sleeve rod on one side, a circular plate is slidably installed on the inner wall of the sleeve rod, a pull rod is fixedly installed on the circular plate, one end of the pull rod is slidably penetrated into the sleeve rod and fixedly installed with a threaded rod, the threaded rod is threadedly installed with a brush handle at one end, the brush handle is fixedly installed with a brush head at one end, the support plate is clamped with the guide sleeve at one end, the guide sleeve is slidably sleeved with the brush handle and the brush head, the other end of the pull rod is slidably penetrated into the support plate and fixedly installed with a handle.
[0005] In the preferred technical scheme of the utility model, the brush handle has a wire, and one end of the wire is provided with a threaded groove matched with the threaded rod.
[0006] In the preferred technical scheme of the utility model, the guide sleeve is divided into a front soft tube and a lower hard tube, the soft tube and the hard tube are tightly connected by hot melt welding, the opening of the soft tube is smooth, the length of the soft tube is 5mm, and the length of the hard tube is 180mm.
[0007] The utility model discloses a technical scheme is preferred, the sleeve rod inner wall one side rotation installs the support ring, the support ring with the fixed mounting spring between the round plate, support ring inner wall with sleeve rod outer wall sliding connection.
[0008] The utility model discloses a technical scheme is preferred, the support ring one side fixed mounting multiple guide rod, the guide rod one end slidingly penetrates in the round plate and extends to the outside, multiple the guide rod annular equidistance is arranged in the support ring one side.
[0009] The utility model discloses a technical scheme is preferred, the hard pipe one end fixed mounting positioning ring, the sleeve rod one end is provided with the annular groove of matching with the positioning ring, the inner diameter of positioning ring is greater than the inner diameter of hard pipe.
[0010] The utility model discloses a technical scheme is preferred, the sleeve rod one end both sides respectively symmetrical fixed mounting side plate, between two the side plate of every side respectively fixed mounting round stick and two -way threaded rod, the two -way threaded rod is symmetrically screwed the arc clamping piece, the arc clamping piece is slidably installed on the round stick, the hard pipe outside is provided with the positioning groove of matching with the arc clamping piece, and the two -way threaded rod one end fixed mounting rotating shaft, and the rotating shaft one end penetrates the side plate and is fixedly installed the steering wheel, and the arc clamping piece with the sleeve rod between gap is provided with.
[0011] The utility model discloses a technical scheme is preferred, the arc clamping piece inner wall fixed mounting plug rod, the positioning groove inner wall is provided with the insertion slot of matching with the plug rod, and the plug rod is arranged at the center of the arc clamping piece inner wall.
[0012] The utility model discloses a technical scheme is preferred, the arc clamping piece inner wall fixed mounting plug rod, the positioning groove inner wall is provided with the insertion slot of matching with the plug rod, and the plug rod is arranged at the center of the arc clamping piece inner wall.
[0013] The utility model discloses a technical scheme is preferred, the arc clamping piece inner wall fixed mounting plug rod, the positioning groove inner wall is provided with the insertion slot of matching with the plug rod, and the plug rod is arranged at the center of the arc clamping piece inner wall.
[0014] The utility model discloses a technical scheme is preferred, the arc clamping piece inner wall fixed mounting plug rod, the positioning groove inner wall is provided with the insertion slot of matching with the plug rod, and the plug rod is arranged at the center of the arc clamping piece inner wall.
[0015] Guarantee the stability and precision of the connection of components: the combination structure of the support ring, the spring and the guide rod can not only buffer the movement of the pull rod to prevent excessive force during operation, but also enhance the stability of the connection between components. The cooperation design of the positioning ring and the annular groove, the arc clamping block and the positioning groove, and the plug rod and the plug groove ensures the accurate and firm position of the guide sleeve during installation and use, avoids displacement or shaking of the guide sleeve during sampling, and guarantees the accuracy and stability of sampling operation.
[0016] Convenient component replacement and equipment maintenance: the brush handle is connected with the threaded rod through the threaded groove. This detachable connection mode enables the brush head and the brush handle to be conveniently replaced after use, reduces the use cost of the equipment, and facilitates cleaning, disinfection and maintenance of the equipment, thereby improving the service life and hygiene standard of the equipment.
[0017] Reduce the influencing factors of operation: the structure of the utility model is reasonable in design and relatively simple to operate, which reduces the dependence on the skills of operators and reduces the fluctuation of sampling success rate caused by differences between operators. In different clinical environments, cervical fetal exfoliated cells can be relatively stably obtained, which provides a more reliable sample source for prenatal diagnosis. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment. It should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.
[0019] Figure 1 It is a structure schematic view of a sleeve cell brush for obtaining cervical fetal exfoliated cells provided by the embodiment of the utility model;
[0020] Figure 2 It is a disassembled structure schematic view of a sleeve cell brush for obtaining cervical fetal exfoliated cells provided by the embodiment of the utility model;
[0021] Figure 3 It is a side view structure schematic view of a sleeve rod provided by the embodiment of the utility model;
[0022] Figure 4 It is a partial structure schematic view of a sleeve cell brush for obtaining cervical fetal exfoliated cells provided by the embodiment of the utility model;
[0023] Figure 5 It is a connection structure schematic view of a guide sleeve provided by the embodiment of the utility model.
[0024] In the figure: 110 - support plate; 120 - guide sleeve; 1201 - hose; 1202 - hard tube; 121 - positioning ring; 130 - sleeve rod; 131 - round plate; 132 - pull rod; 133 - threaded rod; 134 -; 135 - support ring; 136 - spring; 137 - guide rod; 140 - brush handle; 141 - brush head; 150 - side plate; 151 - round rod; 152 - two-way threaded rod; 153 - arc clamping block. DETAILED DESCRIPTION
[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0026] Please refer to Figures 1-4 The present application provides a technical scheme: a sleeve cell brush for obtaining cervical fetal exfoliated cells, comprising a support plate 110 and a guide sleeve 120. The support plate 110 is fixedly installed on one side of the sleeve rod 130. The inner wall of the sleeve rod 130 is slidably installed with a round plate 131. The round plate 131 is fixedly installed with a pull rod 132. One end of the pull rod 132 is slidably penetrated through the sleeve rod 130 and fixedly installed with a threaded rod 133. One end of the threaded rod 133 is threadedly installed with a brush handle 140. One end of the brush handle 140 is fixedly installed with a brush head 141. One end of the support plate 110 is clamped with the guide sleeve 120. The guide sleeve 120 is slidably sleeved with the brush handle 140 and the brush head 141. The other end of the pull rod 132 is slidably penetrated through the support plate 110 and fixedly installed with a handle 134.
[0027] In some specific embodiments, the brush handle 140 has a wire, and one end of the wire is provided with a threaded groove matched with the threaded rod 133. In actual operation, the brush head 141 can be prevented from shaking or falling off due to loose connection during the process of obtaining cells, ensuring that the brush head 141 stably obtains cervical fetal exfoliated cells, thereby improving the accuracy and efficiency of cell acquisition. At the same time, the threaded connection facilitates the disassembly and replacement of the brush handle 140. When the brush handle 140 or the brush head 141 is damaged or contaminated, it can be conveniently replaced, reducing the use cost and improving the maintainability of the equipment.
[0028] In some specific embodiments, the guide cannula 120 is divided into a front section hose 1201 and a lower section hard tube 1202, the hose 1201 and the hard tube 1202 are tightly connected by hot melt welding, the opening of the hose 1201 is smooth, the length of the hose 1201 is 5 mm, and the length of the hard tube 1202 is 180 mm. The hose 1201 part can better fit the physiological structure of the cervix, reduce the friction and damage to the cervical tissue, and reduce the discomfort of pregnant women during sampling. At the same time, it also reduces the risk of potential harm to the fetus; the hard tube 1202 provides stable support for operation, ensuring the stability and accuracy of the sampling process. The smooth opening of the hose 1201 further avoids scratching the cervical tissue, enhancing the safety of the operation.
[0029] In some specific embodiments, the inner wall of the sleeve rod 130 is rotatably installed with a support ring 135, the support ring 135 and the circular plate 131 are fixedly installed with a spring 136, the inner wall of the support ring 135 is slidably connected with the outer wall of the pull rod 132, the support ring 135 is fixedly installed with a plurality of guide rods 137 on one side, one end of the guide rod 137 slidably penetrates the circular plate 131 and extends to the outside, the plurality of guide rods 137 are arranged in a ring shape and equidistantly on one side of the support ring 135, the hard tube 1202 is fixedly installed with a positioning ring 121 at one end, the sleeve rod 130 is provided with a ring-shaped groove matched with the positioning ring 121 at one end, and the inner diameter of the positioning ring 121 is greater than the inner diameter of the hard tube 1202. When the medical staff operates the pull rod 132, if the force is too large, the spring 136 can effectively alleviate the impact force of the pull rod, avoid excessive extrusion or damage to the cervical tissue by the brush head 141, and protect the safety of the cervix and the fetus. At the same time, the spring force makes the brush head 141 shrink in the hose 1201 when not in use.
[0030] Please refer to Figure 5 , the sleeve rod 130 is fixedly installed with a side plate 150 on both sides of one end, a circular rod 151 and a bidirectional threaded rod 152 are fixedly installed between the two side plates 150 on each side, an arc-shaped clamping block 153 is symmetrically screwed on the bidirectional threaded rod 152, the arc-shaped clamping block 153 is slidably installed on the circular rod 151, the outer side of the hard tube 1202 is symmetrically provided with a positioning groove matched with the arc-shaped clamping block 153, and the bidirectional threaded rod 152 is fixedly installed with a rotating shaft at one end. The rotating shaft penetrates the side plate 150 at one end and is fixedly installed with a rotating disc, and a gap is provided between the arc-shaped clamping block 153 and the sleeve rod 130.
[0031] In some specific embodiments, the inner wall of the arc-shaped clamping block 153 is fixedly installed with a plug rod, the inner wall of the positioning groove is provided with a plug groove matched with the plug rod, and the plug rod is arranged at the center of the inner wall of the arc-shaped clamping block 153. This design further enhances the connection tightness and stability between the arc-shaped clamping block 153 and the hard tube 1202. It prevents the guide cannula 120 from accidentally falling off or shaking during use, providing reliable protection for obtaining cervical fetal exfoliated cells.
[0032] Working principle: the medical staff holds the handle 134, drives the pull rod 132 to slide in the sleeve rod 130 by pushing the handle 134. The movement of the pull rod 132 drives the threaded rod 133 connected thereto to move, and since the brush handle 140 is screwed with the threaded rod 133 through the threaded groove on the iron wire, the brush handle 140 and the brush head 141 fixed at one end thereof are correspondingly moved to push out and retract the sleeve pipe, and the inner pipe 140 and the brush head 141 can also be driven to rotate so as to brush more cells, the operation is simple, the outer pipe 120 is ensured not to move, the discomfort of the pregnant woman is reduced, and the brush head 141 can be guided to protrude out of the guide sleeve pipe 120 or retract into the guide sleeve pipe 120 in the process of pulling or pushing the pull rod 132. The guide sleeve pipe 120 is clamped by the support plate 110 first, the opening of the front soft pipe 1201 is smooth and soft, can be inserted in accordance with the physiological curvature of the cervix, and reduces the damage to the cervical tissue. The lower rigid pipe 1202 provides stable support for operation, and facilitates the medical staff to hold and control. The positioning ring 121 at one end of the rigid pipe 1202 cooperates with the annular groove at one end of the sleeve rod 130 to preliminarily determine the installation position of the guide sleeve pipe 120. The rotation of the rotating disc drives the bidirectional threaded rod 152 to rotate and drives the arc-shaped clamping block 153 to relatively move, the arc-shaped clamping block 153 cooperates with the positioning groove on the outer side of the rigid pipe 1202 to realize the stable clamping of the guide sleeve pipe 120, and the insertion rod on the inner wall of the arc-shaped clamping block 153 cooperates with the insertion groove on the inner wall of the positioning groove to enhance the connection stability.
[0033] After adjusting the position of the brush head 141, the medical staff operates the handle 134 to make the brush head 141 contact the cervix under the guidance of the guide sleeve pipe 120 to obtain the fetal exfoliated cells. After the operation is completed, the brush head 141 can be removed from the cervix in the reverse direction, the brush head 141 is not pushed out of the pipe 120 at the vaginal position, the brush head is pushed out after entering the cervix, and after rotating for several times, the brush head is retracted into the pipe 120 first, and then the whole is withdrawn from the cervix and the vagina, so that the pollution of the maternal epithelial cells in the vagina is reduced, the fetal exfoliated cells with higher purity are obtained, and the sampling process is completed. Then, the brush handle 140 can be disassembled as needed for replacement or the equipment can be cleaned, disinfected and maintained.
[0034] The preferred embodiments of the utility model are described above only, and are not used for limiting the utility model, for the person skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A cannula cytobrush for obtaining cervical fetal exfoliative cells, characterized in that, Including support plate and guide sleeve, one side of the support plate fixedly installs sleeve rod, the inner wall of the sleeve rod slidably installs round plate, the round plate is fixedly installed on the pull rod, one end of the pull rod slidably penetrates the sleeve rod and is fixedly installed threaded rod, one end of the threaded rod is threadedly installed brush handle, one end of the brush handle is fixedly installed brush head, one end of the support plate is clamped with the guide sleeve, the guide sleeve is slidably sleeved with the brush handle and the brush head, the other end of the pull rod slidably penetrates the support plate and is fixedly installed handle.
2. The cannula brush for obtaining cervical cytobrush according to claim 1, wherein, The brush handle has a wire, and one end of the wire is provided with a threaded groove matched with the threaded rod.
3. The cannula brush of claim 1, wherein the brush is configured to obtain cervical exfoliated cells. The guide sleeve is divided into a front soft tube and a lower hard tube, the soft tube and the hard tube are tightly connected by hot melt welding, and the soft tube opening is smooth.
4. The cannula brush of claim 1, wherein the brush is configured to obtain cervical exfoliated cells. The inner wall of the sleeve rod is rotatably installed with a support ring, and the support ring is fixedly installed with a spring between the support ring and the round plate.
5. The cannula brush of claim 4, wherein the brush is configured to obtain cervical exfoliated cells. One side of the support ring is fixedly installed with a plurality of guide rods, and one end of the guide rod slidably penetrates the round plate and extends to the outside.
6. The cannula brush of claim 3, wherein the brush is formed of a plurality of bristles. One end of the hard tube is fixedly installed with a positioning ring, and one end of the sleeve rod is provided with an annular groove matched with the positioning ring.
7. The cannula brush of claim 3, wherein the brush is made of a material selected from the group consisting of nylon, polyester, polypropylene, polyethylene, and combinations thereof. Both sides of one end of the sleeve rod are respectively and symmetrically fixedly installed with side plates, a circular rod and a bidirectional threaded rod are respectively fixedly installed between the two side plates on each side, arc-shaped clamping blocks are symmetrically threadedly installed on the bidirectional threaded rod, the arc-shaped clamping blocks are slidably installed on the circular rod, the outer side of the hard tube is symmetrically provided with positioning grooves matched with the arc-shaped clamping blocks, one end of the bidirectional threaded rod is fixedly installed with a rotating shaft, and one end of the rotating shaft penetrates the side plate and is fixedly installed with a rotating disc.
8. The cannula brush of claim 7, wherein the brush is configured to obtain cervical exfoliated cells. The inner wall of the arc-shaped clamping block is fixedly installed with an insertion rod, and the inner wall of the positioning groove is provided with an insertion groove matched with the insertion rod.