A two-piece endometrial sampler

Abstract

The utility model relates to endometrial sampling instrument field especially two -piece formula endometrial sampler, including the core pole and the sleeve of coaxial sleeve setting in the outside of core pole, and core pole can slide along the axial direction of sleeve, the front of core pole is fixed with the sealing element, and the variable volume sampling cavity is established between sealing element and the front end of sleeve, and the front of sleeve is provided with the side hole of communicating with sampling cavity, the sleeve includes main body section and the easy folding section of being located in the front of main body section, and the core pole is contained in the inside of main body section, and the side hole is set up in the lateral wall of easy folding section, the integral connection through the connecting ring of coaxial setting between main body section and easy folding section, and the outer circumferential surface of connecting ring is equipped with pre -folding groove, through the integrated design of core pole and sealing flange, reduced assembly difficulty, through the sleeve front end setting pre -folding groove structure, and the manual breakage without the aid of tools after sampling, effectively simplified sampling process.

Description

Technical Field

[0001] This utility model relates to the field of endometrial sampling instruments, and in particular to a two-piece endometrial sampling device. Background Technology

[0002] In the diagnosis of endometrial lesions, diagnostic curettage, as an invasive procedure, not only easily causes significant pain for patients but also carries the risk of complications such as uterine perforation and infection. While hysteroscopic endometrial biopsy has high accuracy, its high technical requirements and cost make it difficult to widely promote as a routine screening method. Therefore, outpatient endometrial sampling technology has gradually replaced diagnostic curettage and become the preferred diagnostic method for endometrial lesions, providing a more minimally invasive detection option for endometrial cancer, hyperplasia, and other endometrial pathological changes.

[0003] Most commonly used endometrial samplers employ the principle of negative pressure aspiration and generally consist of a core rod and a cannula fitted over it. The core rod has a sealing element at the front, which, together with the front end of the cannula, forms a sampling cavity. The cannula has a side hole communicating with this cavity. During operation, the sampler is inserted into the uterine cavity, the side hole is aligned with the tissue to be sampled, and the core rod is pulled back, creating negative pressure within the cavity to aspirate the tissue sample. However, in these samplers, the sealing element and core rod are often separate designs, which not only increases the assembly process but also raises the difficulty of manufacturing and assembly. Furthermore, after sampling, the front end of the cannula must be cut open before pushing the core rod to expel the sample into a container, making the operation cumbersome and affecting clinical efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a two-piece endometrial sampler that is simple to assemble and easy to use, in order to address the shortcomings of the existing technology.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A two-piece endometrial sampling device, characterized by: It includes a core rod and a sleeve coaxially sleeved on the outside of the core rod, and the core rod can slide along the axial direction of the sleeve; A sealing element is fixedly provided at the front of the core rod, and a sampling cavity with variable volume is provided between the sealing element and the front end of the sleeve. A side hole communicating with the sampling cavity is opened at the front of the sleeve. The sleeve includes a main body section and a foldable section located in front of the main body section. The core rod is housed inside the main body section, and the side hole is opened in the side wall of the foldable section. The main body section and the easily foldable section are integrally connected by a coaxial connecting ring. The outer circumferential surface of the connecting ring is provided with a pre-folding groove, and the outer diameter of the pre-folding groove is smaller than the outer diameter of the core rod.

[0006] The technical problem to be solved by this utility model can be further achieved through the following steps: the sealing element is a sealing flange integrally formed with the core rod, and the outer peripheral surface of the sealing flange forms an interference fit with the inner peripheral surface of the sleeve body section.

[0007] The technical problem to be solved by this utility model can be further achieved through the following steps: the cross-section of the connecting ring is V-shaped, and the pre-folded groove is set in the middle of the connecting ring.

[0008] The technical problem to be solved by this utility model can be further achieved through the following steps: the inner circumferential surface of the connecting ring is provided with a splash-proof film, and the two ends of the splash-proof film extend into the main body section and the foldable section respectively, and are bonded to the inner circumferential surface of the foldable section.

[0009] The technical problem to be solved by this utility model can be further achieved through the following steps: the main body section of the sleeve is provided with a scale mark that facilitates the identification of the insertion depth, and the maximum scale mark is not less than 11cm.

[0010] The technical problem to be solved by this utility model can be further achieved through the following steps: the rear end of the core rod is fixedly equipped with a handle that is easy to hold, and the outer surface of the handle is provided with anti-slip texture.

[0011] The technical problem to be solved by this utility model can be further achieved through the following steps: a limiting ring that cooperates with the sleeve is fixedly installed at the rear of the core rod. When the limiting ring abuts against the sleeve, there is an anti-collision space between the front end of the core rod and the connecting ring.

[0012] Compared with the prior art, the beneficial effects of this utility model are: the integrated molding design of the core rod and the sealing flange effectively simplifies the production process and reduces the assembly difficulty; the pre-folding groove structure at the front end of the sleeve allows it to be broken by hand without the aid of tools after sampling, effectively simplifying the sampling process; and the design of the anti-splash membrane and the limiting ring further ensures the safety and controllability of the operation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model (the dotted and dashed frame in the figure is a partial enlargement); Figure 2 This is a schematic diagram of the core rod structure of this utility model; Figure 3 This is a cross-sectional view a when the present invention is in use (the handle is omitted in the figure); Figure 4 This is a cross-sectional view (b) of the present invention in use (the handle is omitted in the figure). Figure 5 This is a cross-sectional view (c) showing the present invention in use (the handle is omitted in the figure); In the diagram: 1. Core rod; 2. Sleeve; 3. Seal; 4. Sampling cavity; 5. Side hole; 21. Main body section; 22. Easy-break section; 23. Connecting ring; 24. Pre-fold groove; 6. Anti-splash membrane; 7. Scale markings; 8. Handle; 9. Limiting ring. Detailed Implementation

[0014] The specific technical solutions of this utility model are further described below to enable those skilled in the art to further understand this utility model, without constituting a limitation on its rights.

[0015] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0016] Please refer to Figure 1-5 A two-piece endometrial sampler includes a core rod 1 and a sleeve 2 coaxially sleeved on the outside of the core rod 1. The core rod 1 can slide along the axial direction of the sleeve 2. The front end of the sleeve 2 is closed and round-headed, and the rear end is open. During assembly, the core rod 1 is inserted forward into the sleeve 2 from the opening. Both the core rod 1 and the sleeve 2 are injection molded from PP material.

[0017] A sealing element 3 is fixedly installed at the front of the core rod 1. A sampling cavity 4 with variable volume is provided between the sealing element 3 and the front end of the sleeve 2. A side hole 5 communicating with the sampling cavity 4 is opened at the front of the sleeve 2. The sealing element 3 is coaxially arranged with the core rod 1. When the core rod 1 moves backward, the distance between the sealing element 3 and the front end of the sleeve 2 increases, and the sampling cavity 4 increases; conversely, when the core rod 1 moves forward, the sampling cavity 4 decreases.

[0018] Specifically, the sleeve 2 includes a main body section 21 and a flexible section 22 located in front of the main body section 21. The core rod 1 is housed inside the main body section 21, and the side hole 5 is opened on the side wall of the flexible section 22. The outer diameter and inner diameter of the main body section 21 and the flexible section 22 are equal. The side hole 5 is an elliptical hole, and its number can be set to 1-3 according to the usage requirements.

[0019] The main body section 21 and the flexible section 22 are integrally connected by a coaxially arranged connecting ring 23. The outer circumferential surface of the connecting ring 23 is provided with a pre-folding groove 24, the outer diameter of which is smaller than the outer diameter of the core rod 1. The length of the flexible section 22 is 1-2 cm, and the length of the main body section 21 is not less than 12 cm. Figure 1 and Figure 3As shown, the connecting ring 23, through its V-shaped cross section and the pre-folding groove 24, forms a weak point in the mechanical system, so that the easily foldable section 22 can be easily folded off under external force without relying on external tools.

[0020] Specifically, the sealing element 3 is a sealing flange integrally formed with the core rod 1, and the outer peripheral surface of the sealing flange forms an interference fit with the inner peripheral surface of the main body section 21 of the sleeve 2; in this way, the sealing flange can always maintain a dynamic seal with the inner wall of the main body section 21 of the sleeve 2 during the axial sliding process of the core rod 1, ensuring the stable formation of negative pressure in the sampling cavity 4.

[0021] The connecting ring 23 has a V-shaped cross-section, and the pre-folding groove 24 is located in the middle of the connecting ring 23. The V-shaped cross-section design causes stress to concentrate at the pre-folding groove 24, effectively reducing the torque required for breaking and improving the operator's efficiency.

[0022] The inner circumferential surface of the connecting ring 23 is provided with an anti-splash film 6. Both ends of the anti-splash film 6 extend into the main body section 21 and the easily foldable section 22, respectively, and are bonded to the inner circumferential surface of the easily foldable section 22. Thus, when the core rod 1 moves backward to absorb the sample, the anti-splash film 6 adheres to the inner wall of the sleeve 2 in the direction of pressure, without affecting sample absorption. Figure 5 As shown, when the cannula 2 needs to be broken to remove the sample, the anti-splash membrane 6 can effectively wrap the sample to prevent tissue fluid from splashing and causing environmental pollution.

[0023] The main body section 21 of the sleeve 2 is provided with a scale mark 7 for easy identification of the insertion depth, and the maximum scale mark 7 is not less than 11cm; for example Figure 1 As shown, the scale mark 7 helps the operator to accurately control the depth of the sampler entering the uterine cavity, ensuring that the side hole 5 accurately reaches the target area of ​​the endometrium.

[0024] The rear end of the core rod 1 is fixedly equipped with a handle 8 that is easy to hold. The outer surface of the handle 8 is provided with anti-slip texture (not shown in the figure), which makes it easy to hold with one hand and apply force stably, and is conducive to the operation of pulling back the core rod 1 to form negative pressure.

[0025] The rear part of the core rod 1 is fixedly equipped with a limiting ring 9 that cooperates with the sleeve 2. When the limiting ring 9 abuts against the sleeve 2, there is an anti-collision space between the front end of the core rod 1 and the connecting ring 23. In this way, the limiting ring 9 can effectively prevent the core rod 1 from moving too far forward, avoid its front end from hitting or pressing against the connecting ring 23 and interfering with the normal breaking operation, and improve the safety and reliability of the operation.

[0026] Working Principle: When using this invention, the operator first uses a dilator to open and place it at an appropriate position on the cervix, opening the dilator approximately 2 cm and fixing its position. Then, holding the main body 21 of the cannula 2, the operator smoothly inserts the sampler tip into the uterine cavity to the target depth, referring to the scale markings 7 on its surface. Next, while holding the cannula 2 with one hand, the operator pulls the core rod 1 backward with the other hand. At this time, the volume of the sampling cavity 4 between the sealing flange and the tip of the cannula 2 increases, creating negative pressure. Under this negative pressure, endometrial tissue is drawn into the sampling cavity 4 through the side hole 5. After sampling, the operator smoothly withdraws the cannula 2, then holds the main body 21 and the foldable section 22 with both hands, and with slight force, neatly folds the foldable section 22 off the main body 21. During this process, the anti-splash membrane 6 effectively wraps the sample, preventing liquid splashing. Finally, aligning the broken tip of the cannula 2 with the sample bottle, the operator pushes the core rod 1 forward to push the sample completely into the bottle, completing the entire sampling process. This design enables tool-free operation, simplifies and speeds up the process, and effectively improves clinical sampling efficiency.

[0027] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. A two-piece endometrial sampler, characterized in that... : It includes a core rod and a sleeve coaxially sleeved on the outside of the core rod, and the core rod can slide along the axial direction of the sleeve; A sealing element is fixedly provided at the front of the core rod, and a sampling cavity with variable volume is provided between the sealing element and the front end of the sleeve. A side hole communicating with the sampling cavity is opened at the front of the sleeve. The sleeve includes a main body section and a foldable section located in front of the main body section. The core rod is housed inside the main body section, and the side hole is opened in the side wall of the foldable section. The main body section and the easily foldable section are integrally connected by a coaxial connecting ring. The outer circumferential surface of the connecting ring is provided with a pre-folding groove, and the outer diameter of the pre-folding groove is smaller than the outer diameter of the core rod.

2. The two-piece endometrial sampler according to claim 1, characterized in that... The sealing element is a sealing flange integrally formed with the core rod, and the outer peripheral surface of the sealing flange forms an interference fit with the inner peripheral surface of the sleeve body section.

3. The two-piece endometrial sampler according to claim 1, characterized in that... The connecting ring has a V-shaped cross-section, and the pre-folded groove is located in the middle of the connecting ring.

4. The two-piece endometrial sampler according to claim 3, characterized in that... The inner circumferential surface of the connecting ring is provided with a splash-proof film. The two ends of the splash-proof film extend into the main body section and the foldable section, respectively, and are bonded to the inner circumferential surface of the foldable section.

5. The two-piece endometrial sampler according to claim 1, characterized in that... The main body of the sleeve is provided with a scale mark to facilitate the identification of the insertion depth, and the maximum scale mark is not less than 11cm.

6. The two-piece endometrial sampler according to claim 1, characterized in that... The rear end of the core rod is fixedly equipped with a handle for easy gripping, and the outer surface of the handle is provided with anti-slip texture.

7. The two-piece endometrial sampler according to claim 1, characterized in that... The rear part of the core rod is fixedly equipped with a limiting ring that cooperates with the sleeve. When the limiting ring abuts against the sleeve, there is an anti-collision space between the front end of the core rod and the connecting ring.

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