Endometrial sampler with openable sheath head end

Abstract

The utility model is applicable to the technical field of medical instruments, and provides an endometrium sampler with an openable sheath head end, which comprises a tubular sheath, a plurality of arc-shaped curved surfaces, a plurality of arc-shaped curved surfaces and a plurality of arc-shaped curved surfaces, when the arc-shaped curved surfaces are folded inwards, the head end of the outer sheath is in a closed state; when the plurality of arc-shaped curved surfaces are opened outwards, the head end of the outer sheath is in an opened state; the negative pressure suction tube is in a circular tube shape, the outer diameter of the negative pressure suction tube is slightly smaller than the inner diameter of the outer sheath, and when the negative pressure suction tube is pushed towards the head end of the outer sheath, the head end of the negative pressure suction tube pushes the arc-shaped curved surfaces to expand outwards, and the head end of the negative pressure suction tube extends out of the head end of the outer sheath; a piston is arranged on the inner side of the front end of the handle and extends into the tail end of the negative pressure suction tube; when the handle is pulled away from the tail end of the negative pressure suction tube, negative pressure is generated in the negative pressure suction tube. Therefore, the endometrium sampler disclosed by the utility model can avoid the pollution of tissues, cells and microorganisms in the surrounding environment during sampling.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to an endometrial sampler with an openable and closable outer sheath head end. Background Art

[0002] In the prior art, disposable endometrial samplers are mainly used for auxiliary diagnosis and treatment of patients with abnormal uterine bleeding suspected of endometrial lesions and infertility. They are often used as tools for gynecology and obstetrics to absorb the contents of the uterine cavity and perform endometrial biopsy. The disposable endometrial samplers currently on the market enter the uterine cavity directly through the vagina and cervical opening, and after the sampling operation is completed, they are withdrawn to the vagina again through the cervix. During this process, the sampler will be exposed to the vaginal and cervical environment twice. The main disadvantages brought about by this are:

[0003] 1. It is unavoidable to mix vaginal and cervical cells during the operation, and it is impossible to clearly determine whether the obtained cells are from the uterine cavity, cervix or vagina, which may lead to misdiagnosis or missed diagnosis, especially for patients suspected of having malignant lesions.

[0004] 2. It is impossible to conduct clear uterine microbiological tests, such as bacterial flora determination. The microbial flora colonized in the vagina and cervix may be brought into the uterine cavity, causing changes in the microbial ecology of the endometrial tissue, which may affect embryo implantation.

[0005] 3. The large diameter of the disposable endometrial sampler causes a larger wound in the uterine cavity during sampling, increasing the risk of injury, bleeding and infection.

[0006] In summary, the structure of the disposable endometrial sampler in the prior art is obviously inconvenient and defective in actual use, so it is necessary to improve it. Utility Model Content

[0007] In view of the above-mentioned defects, the purpose of the utility model is to provide an endometrial sampler with an openable and closable outer sheath head end, so as to avoid the influence of the vagina and cervix on the sampling during the operation of endometrial sampling, and to avoid the contamination of tissues, cells and microorganisms in the surrounding environment on the entry and removal path of the endometrial sampler.

[0008] In order to achieve the above-mentioned purpose, the utility model provides an endometrial sampler with an openable and closable outer sheath head end, comprising:

[0009] The outer sheath is in a circular tube shape, and the head end of the outer sheath is composed of a plurality of arc-shaped curved surfaces; when the plurality of arc-shaped curved surfaces are gathered inward, the head end of the outer sheath is in a closed state; when the plurality of arc-shaped curved surfaces are opened outward, the head end of the outer sheath is in an open state;

[0010] The negative pressure suction tube is in the shape of a circular tube, and its outer diameter is slightly smaller than the inner diameter of the outer sheath. The head end of the negative pressure suction tube is sleeved on the tail end of the outer sheath. When the negative pressure suction tube is pushed toward the head end of the outer sheath, the head end of the negative pressure suction tube pushes the multiple arc-shaped curved surfaces to open outward, and the head end of the negative pressure suction tube extends from the head end of the outer sheath.

[0011] The handle has a piston disposed on the inner side of its front end, and the piston extends into the tail end of the negative pressure suction tube; when the handle is pulled in a direction away from the tail end of the negative pressure suction tube, negative pressure is generated in the negative pressure suction tube.

[0012] According to the endometrial sampler, the negative pressure suction tube comprises:

[0013] The longitudinal tube is in the shape of a round tube, and its outer diameter is slightly smaller than the inner diameter of the outer sheath. The head end of the longitudinal tube is sleeved on the tail end of the outer sheath.

[0014] The tube core is in the shape of a round tube, and its outer diameter is slightly smaller than the inner diameter of the longitudinal tube. The head end of the tube core is sleeved on the tail end of the longitudinal tube, and the piston extends into the tail end of the tube core.

[0015] According to the endometrial sampler, when the plurality of arc-shaped surfaces are retracted inwardly, the head end of the outer sheath is umbrella-shaped or hemispherical.

[0016] According to the endometrial sampler, the plurality of arc-shaped surfaces include four arc-shaped surfaces with an arc angle of 90 degrees; or

[0017] The multiple arc-shaped surfaces include three arc-shaped surfaces with an angle of 120 degrees.

[0018] According to the endometrial sampler, the length of the outer sheath is about 15 cm; the length of the negative pressure suction tube is adapted to the length of the outer sheath.

[0019] According to the endometrial sampler, the inner diameter of the outer sheath is 4-6 mm, the inner diameter of the longitudinal tube is 2.5-5 mm, and the inner diameter of the tube core is 1.5-2.5 mm.

[0020] According to the endometrial sampler, the inner diameter of the outer sheath is 5 mm, the inner diameter of the longitudinal tube is 3 mm, and the inner diameter of the tube core is 2 mm.

[0021] According to the endometrial sampler, the outer sheath is made of a transparent material, and the longitudinal tube is provided with scales.

[0022] According to the endometrial sampler, a pattern is arranged on the outer side of the handle.

[0023] According to the endometrial sampler, the pattern is a screw thread.

[0024] The utility model is provided by setting an endometrial sampler with an openable outer sheath head end to include an outer sheath, a negative pressure suction tube and a handle. The outer sheath is in the shape of a circular tube, and the head end of the outer sheath is composed of a plurality of arc-shaped curved surfaces; the negative pressure suction tube is in the shape of a circular tube, and its outer diameter is slightly smaller than the inner diameter of the outer sheath, the head end of the negative pressure suction tube is sleeved on the tail end of the outer sheath, and when the negative pressure suction tube is pushed toward the head end of the outer sheath, the head end of the negative pressure suction tube pushes the plurality of arc-shaped curved surfaces to open outward, and the head end of the negative pressure suction tube extends from the head end of the outer sheath; a piston is provided on the inner side of the front end of the handle, and the piston extends into the tail end of the negative pressure suction tube; when the handle is pulled in the direction away from the tail end of the negative pressure suction tube, negative pressure is generated in the negative pressure suction tube to perform sampling. The disposable endometrial sampler with a matching outer sheath and a negative pressure suction tube is not only easy to operate, but also because when the endometrial sampler provided by the utility model is used for sampling, the sampling component negative pressure suction tube is completely in the outer sheath when passing through the vagina and cervix, so the sampled uterine cavity contents will not be mixed with vaginal and cervical cells, or mixed with vaginal and cervical colonized microorganisms, and the negative pressure suction device with an outer sheath avoids the contamination of tissues, cells and microorganisms in the surrounding environment on the path of entry and removal of the negative pressure sampler. This significantly improves the detection accuracy and helps to improve the auxiliary diagnosis and treatment effects of patients with endometrial lesions and infertility. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of an endometrial sampler with an openable and closable outer sheath head end provided by an embodiment of the utility model;

[0026] Figure 2 It is a schematic diagram of the three-dimensional structure of an endometrial sampler with an openable and closable outer sheath head end provided by an embodiment of the utility model;

[0027] Figure 3 It is a schematic structural diagram of an endometrial sampler with an openable and closable outer sheath head end provided by an embodiment of the utility model;

[0028] Figure 4 yes Figure 3 Middle AA section view;

[0029] Figure 5 yes Figure 3 Mid-CC section;

[0030] Figure 6 It is a schematic structural diagram of an endometrial sampler with an openable and closable outer sheath head end provided by an embodiment of the utility model;

[0031] Figure 7 yes Figure 6 Middle BB section;

[0032] Figure 8 It is a schematic diagram of the three-dimensional structure of the outer sheath of the endometrial sampler provided by an embodiment of the utility model and having an openable and closable outer sheath head end;

[0033] Fig. 9 It is a front structural schematic diagram of an outer sheath of an endometrial sampler with an openable and closable outer sheath head end provided by an embodiment of the utility model;

[0034] Fig.10 It is a schematic structural diagram of a longitudinal tube of an endometrial sampler with an openable and closable outer sheath head end provided by an embodiment of the utility model;

[0035] Fig.11 It is a schematic structural diagram of a tube core of an endometrial sampler with an openable and closable outer sheath head end provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0037] It should be noted that references to "one embodiment", "embodiment", "example embodiment", etc. in this specification refer to the embodiment described, which may include specific features, structures or characteristics, but not every embodiment must include these specific features, structures or characteristics. In addition, such expressions do not refer to the same embodiment. Furthermore, when describing specific features, structures or characteristics in conjunction with an embodiment, whether or not there is an explicit description, it has been shown that it is within the knowledge of those skilled in the art to combine such features, structures or characteristics into other embodiments.

[0038] In addition, certain words are used in the specification and subsequent claims to refer to specific components or parts. Those with ordinary knowledge in the relevant field should understand that manufacturers can use different nouns or terms to refer to the same component or part. This specification and subsequent claims do not use differences in names as a way to distinguish components or parts, but use differences in the functions of components or parts as the criteria for distinction. "Including" and "including" mentioned throughout the specification and subsequent claims are open-ended terms and should be interpreted as "including but not limited to". In addition, the word "connected" here includes any direct and indirect electrical connection means. Indirect electrical connection means include connection through other devices.

[0039] See also Figure 1 , Figure 8 and Fig. 9In one embodiment of the present invention, an endometrial sampler 100 having an openable and closable outer sheath head is provided, comprising:

[0040] The outer sheath 1 is in a circular tube shape, and the head end 11 of the outer sheath is composed of a plurality of arc-shaped curved surfaces 12; when the plurality of arc-shaped curved surfaces 12 are gathered inward, the head end 11 of the outer sheath is in a closed state; when the plurality of arc-shaped curved surfaces 12 are opened outward, the head end 11 of the outer sheath is in an open state;

[0041] The outer sheath 1 is a round tube, and the head end 11 of the outer sheath can be opened and closed. Before sampling, the multiple arc-shaped curved surfaces 12 are closed to protect the sampling components inside the outer sheath 1 from the non-sampling environment. During sampling, the multiple arc-shaped curved surfaces 12 are opened, and the sampling components inside the outer sheath 1 extend from the head end 11 of the outer sheath for sampling, and retract after the sampling is completed, and the multiple arc-shaped curved surfaces 12 are closed again.

[0042] The negative pressure suction tube 2 is in the shape of a circular tube, and its outer diameter is slightly smaller than the inner diameter of the outer sheath 1. The head end 21 of the negative pressure suction tube is sleeved on the tail end 13 of the outer sheath. When the negative pressure suction tube 2 is pushed toward the head end 11 of the outer sheath, the head end 21 of the negative pressure suction tube pushes the multiple arc-shaped curved surfaces 12 to open outward, and the head end 21 of the negative pressure suction tube extends from the head end 11 of the outer sheath.

[0043] The negative pressure suction tube 2 is a specific sampling component, which is sleeved in the outer sheath 1. Its overall outer diameter is slightly smaller than the inner diameter of the outer sheath 1, thereby eliminating excessive gaps between the two and facilitating sampling.

[0044] The handle 5 has a piston 51 disposed inside its front end, and the piston 51 extends into the tail end 22 of the negative pressure suction tube; when the handle 5 is pulled in a direction away from the tail end 22 of the negative pressure suction tube, negative pressure is generated in the negative pressure suction tube 2.

[0045] A piston 51 is provided on the inner side of the handle 5, and the piston 51 can be integrally formed with the inner side of the handle 5, or can be detachably connected. The piston 51 extends into the tail end 22 of the negative pressure suction tube, and the piston 51 can slide in the negative pressure suction tube 2; thus, the negative pressure suction tube 2 and the handle 5 form a sampling device such as a syringe, and the sampling device can generate negative pressure. Before sampling using the endometrial sampler 100 with an openable outer sheath head end, the head end 11 of the outer sheath is in a closed state. After the endometrial sampler 100 with an openable outer sheath head end is extended into the uterine cavity, the negative pressure suction tube 2 is pushed forward, and the head end 21 of the negative pressure suction tube will push the multiple arc-shaped surfaces 12 outward, thereby the head end 11 of the outer sheath is opened, and the head end 21 of the negative pressure suction tube extends from the head end 11 of the outer sheath. Thereafter, when the handle 5 is pulled again, negative pressure is generated in the negative pressure suction tube 2, and thus the negative pressure suction tube 2 can absorb the contents of the uterine cavity. After the sampling is completed, the head end 21 of the negative pressure suction tube is withdrawn into the outer sheath 1, and the multiple arc-shaped curved surfaces 12 of the head end 11 of the outer sheath are gathered, so that the head end 11 of the outer sheath is closed. Finally, the entire endometrial sampler 100 with an openable and closable outer sheath head end withdraws from the human body to complete the sampling. It can be seen that the endometrial sampling is performed using the endometrial sampler 100 with an openable and closable outer sheath head end provided by the present application. Since the negative pressure suction tube 2 of the sampling component is completely in the outer sheath 1 when passing through the vagina and the cervix, the uterine cavity contents sampled by it will not be mixed with vaginal and cervical cells, or mixed with vaginal and cervical colonization microorganisms, and the sampling accuracy is high, which avoids the influence of the vagina and cervix during the operation to the greatest extent, and helps to improve the effect of auxiliary diagnosis and treatment of patients with endometrial lesions and infertility. Optionally, the endometrial sampler 100 with an openable and closable outer sheath head end is a disposable endometrial sampler made of medical plastic.

[0046] See also Figure 2 to Figure 11 In a preferred embodiment of the present utility model, the negative pressure suction tube 2 comprises:

[0047] The longitudinal tube 23 is in the shape of a round tube, and its outer diameter is slightly smaller than the inner diameter of the outer sheath 1. The head end 231 of the longitudinal tube is sleeved on the tail end 13 of the outer sheath;

[0048] The tube core 24 is in the shape of a round tube, and its outer diameter is slightly smaller than the inner diameter of the longitudinal tube 23 . The head end 241 of the tube core is sleeved on the tail end 232 of the longitudinal tube 23 , and the piston 51 extends into the tail end 242 of the tube core.

[0049] In this embodiment, the negative pressure suction tube 2 is composed of two round tubes, including a longitudinal tube 23 and a tube core 24. A scale is set on the longitudinal tube 23. The overall length of the scale can be 10 to 15 cm. The measurement unit of the scale is millimeter. The outer sheath 1 is made of a transparent material. And each component of the endometrial sampler 100 with an openable and closable outer sheath head end is made of a flexible material. Since the outer sheath 1 is transparent and does not block the field of vision, the body of the longitudinal tube 23 has a scale, and the scale on the longitudinal tube 23 allows medical staff to measure the length of the uterine fundus, etc.

[0050] In one embodiment of the utility model, when the multiple curved surfaces 12 are retracted inward, the head end 11 of the outer sheath is umbrella-shaped or hemispherical. The multiple curved surfaces 12 include 4 curved surfaces 12 with an arc of 90 degrees; or the multiple curved surfaces 12 include 3 curved surfaces 12 with an arc of 120 degrees. The curved surfaces 12 are protruding outward and have an arc. After the multiple curved surfaces 12 are opened, they can just accommodate the head end 231 of the negative pressure suction tube 2 to pass through. The removed endometrial tissue can avoid the influence of the cervix or vagina, which is beneficial to clinical diagnosis.

[0051] In one embodiment of the utility model, the length of the outer sheath 1 is about 15 cm. To adapt to different human bodies, the length of the outer sheath 1 can be set to different specifications, such as 13 cm to 17 cm; the negative pressure suction tube 2 is equivalent to the length of the outer sheath, so that the two can adapt to each other. In addition, the inner diameter of the outer sheath 1 is 4 to 6 mm, the inner diameter of the longitudinal tube 23 is 2.5 to 5 mm, and the inner diameter of the tube core 24 is 1.5 to 2.5 mm. In a preferred embodiment of the utility model, the inner diameter of the outer sheath 1 is 5 mm, the inner diameter of the longitudinal tube 23 is 3 mm, and the inner diameter of the tube core 24 is 2 mm. Compared with the disposable endometrial samplers on the market in the prior art, whose tube diameter is larger, usually greater than 6 mm, the endometrial sampler 100 in this embodiment has an openable and closable outer sheath head end, and the outer sheath 1 and the negative pressure suction tube 2 are matched, and the tube diameters are smaller, so the sampling wound is small and the bleeding is less, which reduces the patient's discomfort during the operation. The inner diameter of the outer sheath 1 just accommodates the negative pressure suction tube 2 to slide therein, eliminating the gap between the outer sheath 1 and the negative pressure suction tube 2.

[0052] See also Figure 2 to Figure 11In one embodiment of the utility model, an endometrial sampler 100 with an openable and closable outer sheath head end includes an outer sheath 1, which is about 15 cm long and has a diameter of about 5 mm. The head end 11 of the outer sheath is composed of four 90° sectors, and each sector protrudes outward with a slight curvature. Four such arc-shaped surfaces form an umbrella end structure. When closed, the four arc-shaped surfaces are not opened, the head end 11 of the outer sheath is in a closed state, and the longitudinal tube 23 can push open the umbrella end of the head end 11 of the outer sheath with a little force; the umbrella end of the outer sheath 1 is in an open state, and the diameter of the outer sheath 1 can accommodate the longitudinal tube 23 to pass through. The inner diameter of the longitudinal tube 23 is about 3mm, and the longitudinal tube 23 is engraved with scales. The tail end of the longitudinal tube 23 is the connection with the piston 51. The inner diameter of the tube core 24 is about 2mm, which is located in the longitudinal tube 23. The tube core 24 can move back and forth at the tail end and the head end of the longitudinal tube 23 through the handle 5. In the longitudinal tube 23, the tube core 24 and the piston 51 constitute a sampling device similar to a syringe. In addition, the outer side of the handle 5 is provided with a pattern to increase the friction of the outer side of the handle 5, which is convenient for holding and operation. The optional pattern is a thread-like pattern.

[0053] When using the endometrial sampler 100 with an openable outer sheath head, the doctor places the top of the longitudinal tube 2 against the outer sheath 1, holds the connection between the tail end of the outer sheath 1 and the longitudinal tube 2, and slowly inserts it into the patient's uterine cervical os, fixes the outer sheath 1, and then pushes the longitudinal tube 2 forward with a little force. At this time, the longitudinal tube 2 enters the uterine cavity through the head end 11 of the outer sheath. When the longitudinal tube 23 touches the bottom of the uterus, the handle 5 is pulled, and the tube core 24 retreats. At this time, the longitudinal tube 23 is negative pressure, and the endometrial tissue is sucked. When withdrawing, the longitudinal tube 23 is first withdrawn into the outer sheath 1, and the multiple arc-shaped surfaces 12 are closed, and then the outer sheath 1 and the longitudinal tube 23 are withdrawn from the uterine cervical os together. Since the entire negative pressure suction tube 2 directly enters the uterine cavity through the outer sheath 1, it is avoided that the microbial flora colonized in the vagina and cervix are brought into the uterine cavity, the endometrial inflammatory response is reduced, and the risk of infection is reduced. In addition, the endometrial sampler 100 with an openable outer sheath head is made of a flexible material, has a small caliber, a small surgical wound, and less bleeding, and can be freely rotated to reach the corners of the uterus and other parts to avoid empty suction and leakage. Moreover, since the negative pressure suction tube 2 is completely in the outer sheath 1 when passing through the vagina and cervix, the contamination of tissues, cells and microorganisms in the surrounding environment will not enter the sampler, which can significantly reduce the influence of vaginal and cervical microorganisms on uterine cavity microbiological detection, and significantly improve the detection accuracy.

[0054] In summary, the utility model is provided by configuring an endometrial sampler with an openable outer sheath head end to include an outer sheath, a negative pressure suction tube and a handle. The outer sheath is in the shape of a circular tube, and the head end of the outer sheath is composed of a plurality of arc-shaped curved surfaces; the negative pressure suction tube is in the shape of a circular tube, and its outer diameter is slightly smaller than the inner diameter of the outer sheath, the head end of the negative pressure suction tube is sleeved on the tail end of the outer sheath, and when the negative pressure suction tube is pushed toward the head end of the outer sheath, the head end of the negative pressure suction tube pushes the plurality of arc-shaped curved surfaces to open outward, and the head end of the negative pressure suction tube extends from the head end of the outer sheath; a piston is provided on the inner side of the front end of the handle, and the piston extends into the tail end of the negative pressure suction tube; when the handle is pulled in the direction away from the tail end of the negative pressure suction tube, negative pressure is generated in the negative pressure suction tube to perform sampling. The disposable endometrial sampler with an outer sheath and a negative pressure suction tube is not only easy to operate, but also because when the endometrial sampler provided by the utility model is used for sampling, the negative pressure suction tube of the sampling component is completely in the outer sheath when passing through the vagina and the cervix. Therefore, the sampled uterine cavity contents will not be mixed with vaginal and cervical cells, or mixed with the microbial flora colonized in the vagina and the cervix, thereby avoiding the contamination of tissues, cells and microorganisms in the surrounding environment on the entry and removal path of the sampler, and helping to improve the effect of auxiliary diagnosis and treatment of patients with endometrial lesions and infertility.

[0055] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field can make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. An endometrial sampler with an openable and closable outer sheath head, characterized in that: include: The outer sheath is in a circular tube shape, and the head end of the outer sheath is composed of a plurality of arc-shaped curved surfaces; when the plurality of arc-shaped curved surfaces are gathered inward, the head end of the outer sheath is in a closed state; when the plurality of arc-shaped curved surfaces are opened outward, the head end of the outer sheath is in an open state; The negative pressure suction tube is in the shape of a circular tube, and its outer diameter is slightly smaller than the inner diameter of the outer sheath. The head end of the negative pressure suction tube is sleeved on the tail end of the outer sheath. When the negative pressure suction tube is pushed toward the head end of the outer sheath, the head end of the negative pressure suction tube pushes the multiple arc-shaped curved surfaces to open outward, and the head end of the negative pressure suction tube extends from the head end of the outer sheath. The handle has a piston disposed on the inner side of its front end, and the piston extends into the tail end of the negative pressure suction tube; when the handle is pulled in a direction away from the tail end of the negative pressure suction tube, negative pressure is generated in the negative pressure suction tube.

2. The endometrial sampler according to claim 1, characterized in that: The negative pressure suction tube comprises: The longitudinal tube is in the shape of a round tube, and its outer diameter is slightly smaller than the inner diameter of the outer sheath. The head end of the longitudinal tube is sleeved on the tail end of the outer sheath. The tube core is in the shape of a round tube, and its outer diameter is slightly smaller than the inner diameter of the longitudinal tube. The head end of the tube core is sleeved on the tail end of the longitudinal tube, and the piston extends into the tail end of the tube core.

3. The endometrial sampler according to claim 1, characterized in that: When the plurality of arc-shaped surfaces are gathered inwardly, the head end of the outer sheath is umbrella-shaped or hemispherical.

4. The endometrial sampler according to claim 1, characterized in that: The plurality of arc-shaped surfaces include four arc-shaped surfaces with an arc angle of 90 degrees; or The multiple arc-shaped surfaces include three arc-shaped surfaces with an angle of 120 degrees.

5. The endometrial sampler according to claim 1, characterized in that: The length of the outer sheath is about 15 cm; the length of the negative pressure suction tube is adapted to the length of the outer sheath.

6. The endometrial sampler according to claim 2, characterized in that: The inner diameter of the outer sheath is 4-6 mm, the inner diameter of the longitudinal tube is 2.5-5 mm, and the inner diameter of the tube core is 1.5-2.5 mm.

7. The endometrial sampler according to claim 6, characterized in that: The inner diameter of the outer sheath is 5 mm, the inner diameter of the longitudinal tube is 3 mm, and the inner diameter of the tube core is 2 mm.

8. The endometrial sampler according to claim 2, characterized in that: The outer sheath is made of a transparent material, and the longitudinal tube is provided with scales.

9. The endometrial sampler according to claim 2, characterized in that: The outer side of the handle is provided with patterns.

10. The endometrial sampler according to claim 9, characterized in that: The pattern is a thread.

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