Negative pressure endometrial sampler and method of use thereof

Abstract

The present invention belongs to the field of medical devices, and specifically relates to a negative pressure endometrial sampler and a method for using the same; it includes a negative pressure adsorption device, a pressure regulating device and a rotatable adsorption tube; the rotatable adsorption tube includes a rotating sleeve and an adsorption tube assembly; the adsorption tube assembly includes an adsorption tube and a protective tube arranged outside the adsorption tube; a scraper and a suction hole are distributed circumferentially at one end of the adsorption tube away from the rotating sleeve; one end of the rotating sleeve is connected to the pressure regulating tube, and the inside of the other end is rotatably connected with the outer wall of the adsorption tube through a bearing; a rotating block is provided at the connecting end of the adsorption tube and the rotating sleeve; a movable card block is provided between the protective tube and the rotating block; the rotating block and the protective tube can be magnetically adsorbed; a head is provided on the top of the adsorption tube; when the card block is installed, the protective tube contacts and cooperates with the end face of the head. The device can remove the intrauterine fluid before endometrial scraping, thereby improving the quality of endometrial sampling.

Description

Technical Field

[0001] The invention belongs to the field of medical devices, and in particular relates to a negative pressure endometrial sampler and a method of using the same. Background Art

[0002] Some patients with endometrial cancer or suspected endometrial cancer need to have their endometrial samples extracted for pathological examination before diagnosis. Currently, obstetricians and gynecologists mostly use curettage to obtain samples when performing endometrial pathological examinations. When performing curettage, they mostly use a metal endometrial curette with a scoop-shaped or spoon-shaped scraper. During the operation, the endometrial curette is inserted along the cervix to the fundus of the uterus, and several pieces are scraped from top to bottom close to the uterine wall to obtain endometrial specimens.

[0003] The existing method of endometrial sampling using an endometrial curette has the following problems:

[0004] First, the use of a scraper requires the medical operator to exert greater force, which exerts greater pressure on the uterine wall, causing greater damage to the uterine wall and causing great pain to the patient. More seriously, if the medical operator does not operate the scraper properly, it may easily cause uterine perforation, resulting in heavy bleeding and life-threatening consequences. Second, the sampling effect of using a scraper is poor, and continuous sampling of multiple parts cannot be performed. Third, when a small amount of fluid is stored in the uterus, the quality of the sample will be reduced if it is not cleared first. The traditional method is to first remove the fluid in the uterus and then extract the sample. Repeated entry into the uterus can cause pain to the sampler himself. In severe cases, it can cause external bacteria to enter the uterus and cause infection. Therefore, it is necessary to design a new type of negative pressure endometrial sampler to overcome the above technical defects. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects in the prior art and provide a negative pressure endometrial sampler and a method of using the same.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A negative pressure endometrial sampler, comprising a negative pressure adsorption device, a pressure regulating device and a rotatable adsorption tube;

[0008] The negative pressure adsorption device comprises a needle tube, a piston matching the needle tube, and a guide outlet arranged at the side end of the needle tube;

[0009] The pressure regulating device comprises a pressure regulating tube and a regulating valve arranged on the pressure regulating tube; the pressure regulating tube is connected to the adsorption port of the needle tube;

[0010] The rotatable adsorption tube includes a rotating sleeve and an adsorption tube assembly; the adsorption tube assembly includes an adsorption tube and a protective tube arranged outside the adsorption tube; a scraper and a suction hole are distributed circumferentially at one end of the adsorption tube away from the rotating sleeve; one end of the rotating sleeve is connected to the pressure regulating tube, and the interior of the other end is rotatably connected with the outer wall of the adsorption tube through a bearing; a rotating block is provided at the connecting end of the adsorption tube and the rotating sleeve; a movably connected clamping block is provided between the protective tube and the rotating block; the rotating block and the protective tube can be magnetically adsorbed; a head is provided on the top of the adsorption tube; when the clamping block is installed, the protective tube contacts and cooperates with the end face of the head.

[0011] The regulating valve includes a central axis, a baffle arranged on the central axis, and a rotating disk arranged at the bottom of the central axis; a ratchet is arranged in a ring at the rotating connection between the pressure regulating tube and the rotating disk; a guide rod matching the ratchet is hinged on the rotating disk; a spring is arranged between the guide rod and the rotating disk; a sealing plate for sealing the rotating disk is fixed on the central axis.

[0012] The end of the central axis is provided with a rotating rod.

[0013] A slide groove is axially arranged on the outer wall of the adsorption tube; a slide rail matching the slide groove is axially arranged on the inside of the protection tube.

[0014] The top of the sealing head is a flat structure.

[0015] The outer wall of the protection tube is provided with scale lines.

[0016] The present application also includes a method for using the negative pressure endometrial sampler, which comprises the following steps:

[0017] a) Before use, close the regulating valve, install the clamping block between the rotating block and the protection tube, hold the front end of the protection tube against the sealing head, and place the adsorption tube completely inside the protection tube so that the device does not scratch the inner wall of the cervix when entering the cervix; close the outlet on the needle tube;

[0018] b) When in use, the sampler is inserted into the uterus. When it is inserted into the predetermined position, the card block is removed. Due to the magnetic attraction, the rotating block drags the protective tube to separate the protective tube from the sealing head, exposing the adsorption tube. Then the regulating valve is in a fully open and closed state, and the piston in the needle tube is pulled out to generate negative pressure to adsorb the liquid in the uterus. When the needle tube is fully adsorbed, the regulating valve is closed, and the outlet on the needle tube is connected to the catheter and connected to the external collection device. Then the needle tube is squeezed. Since the regulating valve is closed, the liquid in the needle tube is discharged from the needle tube along the outlet;

[0019] c) Repeat b) until there is no excess fluid in the uterus;

[0020] d) Close the outlet on the needle tube; rotate the regulating valve to a predetermined slightly open state, and then twist the rotating block to drive the rotation of the adsorption tube, so that the scraper on the adsorption tube scrapes the endometrium in the uterus. After rotating the belt for several circles, pull out the needle tube, and absorb the scraped endometrium through the suction hole. Repeat the rotation of the scraper and the pulling out of the needle tube to achieve sampling of the endometrium at different depths; at the same time, every time the piston is pulled upward for a certain distance, adjust the regulating valve to open and close to achieve control of the negative pressure.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. This device can remove the intrauterine fluid before endometrial scraping, thus improving the quality of endometrial sampling;

[0023] 2. By using the protective tube and the card block together, the scraper can be prevented from scratching the cervix and other places when the device enters the uterus, thereby ensuring the safety of the sampler when the device enters the uterus.

[0024] 3. Through the quantitative rotation of the ratchet, the pressure value of the negative pressure can be effectively defined, ensuring that the pressure value of the negative pressure is controlled during adsorption, so that the collected samples can clearly reflect that the equipment is collected at different positions, allowing medical staff to more accurately determine the location of the lesion.

[0025] 4. The device has a guide port on the needle tube, so that the device only needs to be inserted into the uterus once to discharge the liquid and perform sampling at different positions, which greatly reduces the contact between the vagina and the outside world during the entire sampling process and reduces the risk of bacterial infection. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the present invention after the card block is disassembled;

[0027] Figure 2 This is a schematic diagram of the structure of the present invention after the card block is installed;

[0028] Figure 3 This is a front view structural schematic diagram of the present invention after the card block is installed;

[0029] Figure 4 It is a partial schematic diagram of the adsorption tube of the present invention;

[0030] Figure 5 It is a partial schematic cross-sectional view of the adsorption tube of the present invention;

[0031] Figure 6 It is a partial schematic cross-sectional view of the pressure regulating tube of the present invention;

[0032] Figure 7 It is a partial schematic cross-sectional view of the pressure regulating tube of the present invention.

[0033] In the figure, needle tube 1, guide outlet 1-1, adsorption port 1-2, pressure regulating tube 2, ratchet 2-2, regulating valve 3, central axis 3-1, rotating disk 3-1-1, guide rod 3-1-2, spring 3-1-3, sealing plate 3-1-4, baffle 3-2, rotating rod 3-3, rotating sleeve 4, adsorption tube assembly 5, adsorption tube 5-1, rotating block 5-2, slide groove 5-3, protective tube 5-4, scale line 5-4-1, block 5-5, scraper 5-6, suction hole 5-7, and head 5-8. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and the best embodiments.

[0035] Figure 1-7 A negative pressure endometrial sampler is shown, comprising a negative pressure adsorption device, a pressure regulating device and a rotatable adsorption tube; the negative pressure adsorption device comprises a needle tube 1, a piston matching the needle tube, and a guide outlet 1-1 arranged at the side end of the needle tube; the guide outlet 1-1 is at an angle of 30°-60° to the pulling end of the needle tube 1; the angle of 30°-60° is to ensure that when an external catheter is connected to the guide outlet, it will not hinder the position of the device and the uterus, and facilitate the installation and disassembly of the external device; and the guide outlet is close to the adsorption port, and the adsorption port 1-2 of the needle tube 1 is provided with an internal thread, and the adsorption port 1-2 is threadedly connected to one end of the pressure regulating tube 2, and the guide outlet 1-1 is provided with a threaded interface for connection.

[0036] The pressure regulating device comprises a pressure regulating tube 2 and a regulating valve 3 arranged on the pressure regulating tube; the pressure regulating tube 2 is connected to the adsorption port 1-2 of the needle tube; the regulating valve comprises a central axis 3-1, a baffle 3-2 arranged on the central axis, and a rotating disk 3-1-1 arranged at the bottom of the central axis; a ratchet 2-2 is arranged in an annular manner at the rotation connection between the pressure regulating tube and the rotating disk; a guide rod 3-1-2 matching the ratchet is hinged on the rotating disk; a spring 3-1-3 is arranged between the guide rod and the rotating disk; a sealing plate 3-1-4 for sealing the rotating disk is fixed on the central axis. A rotating rod 3-3 is arranged at the end of the central axis. This part of the device mainly makes the central axis rotate quantitatively and unidirectionally through the cooperation of the ratchet 2-2 and the guide rod 3-1-2. This arrangement is to facilitate the control of the pressure value of the negative pressure, and the pressure value of the negative pressure is converted according to the tooth pitch of the ratchet, so as to have a better control of the adsorption negative pressure.

[0037] The rotatable adsorption tube includes a rotating sleeve 4 and an adsorption tube assembly 5; the adsorption tube assembly includes an adsorption tube 5-1 and a protective tube 5-4 arranged outside the adsorption tube; a slide groove 5-3 is axially arranged on the outer wall of the adsorption tube; a slide rail 5-4 matching the slide groove is axially arranged on the inner part of the protective tube. The adsorption tube is slidably connected to the protective tube; a scraper 5-6 and a suction hole 5-7 are distributed circumferentially at one end of the adsorption tube away from the rotating sleeve;

[0038] One end of the rotating sleeve 4 is connected to the pressure regulating tube 2, and the interior of the other end is rotatably connected to the outer wall of the adsorption tube 5-1 through a bearing; here it means that one end of the rotating sleeve 4 is rotatably connected to the adsorption tube 5-1, and the other end is fixedly connected to the pressure regulating tube 2, and this connection relationship is not limited to the one disclosed in this embodiment, as long as it can be ensured that one end of the rotating sleeve 4 is rotatably connected to the adsorption tube 5-1, and the other end is fixedly connected to the pressure regulating tube 2.

[0039] The connecting end of the adsorption tube and the rotating sleeve is provided with a rotating block 5-2; a movable clamping block 5-5 is provided between the protection tube and the rotating block; the rotating block and the protection tube can be magnetically adsorbed; a sealing head 5-8 is provided on the top of the adsorption tube; the top of the sealing head is a flat structure, and the flat structure of the sealing head 5-8 can ensure that a smaller impact is generated when entering the uterus, thereby ensuring the safety of the user. When installing the clamping block, the protection tube contacts and cooperates with the end face of the sealing head. Graduation lines are provided on the outer wall of the protection tube.

[0040] A method for using a negative pressure endometrial sampler comprises the following steps:

[0041] a) Before use, adjust the rotating rod 3-3 to make the regulating valve 3 in a closed state, install the clamping block 5-5 between the rotating block 5-2 and the protective tube 5-4, so that the front end of the protective tube 5-4 is supported at the sealing head 5-8, and the side of the protective tube 5-4 after being supported is flush with the side of the sealing head 5-8, so that the adsorption tube is completely in the protective tube; so that the device does not scratch the inner wall of the cervix when entering the cervix; close the guide port 1-1 on the needle tube 1;

[0042] b) When in use, the sampler is inserted into the uterus, and the insertion depth is controlled by the scale line 5-4-1 set on the side wall of the protective tube 5-4. When it is inserted to the predetermined position, the block 5-5 is removed, and the protective tube 5-4 is dragged outward so that it is magnetically adsorbed to the rotating block 5-2, and the adsorption tube 5-1 is exposed; then the adjusting rotating rod 3-3 is screwed to make the regulating valve 3 in a fully open and closed state, and the liquid in the uterus is adsorbed by pulling the needle tube 1. When one tube is fully adsorbed, the adjusting rotating rod 3-3 is screwed to make the regulating valve 3 in a closed state, and the outlet 1-1 on the needle tube 1 is connected to the external collection device through the catheter, and then the needle tube 1 is squeezed. Since the regulating valve 3 is closed, the liquid in the needle tube 1 is discharged from the needle tube 1 along the outlet 1-1;

[0043] c) Repeat step b until there is no excess fluid in the uterus;

[0044] d) Close the outlet 1-1 on the needle tube 1; rotate the regulating rotating rod 3-3 a little to put the regulating valve 3 in a predetermined slightly open state, then screw the rotating block 5-2, and drive the adsorption tube 5-1 to rotate through the rotation of the rotating block 5-2, so that the scraper 5-6 scrapes the endometrium in the uterus, and after rotating it for several circles, pull out the needle tube 1, and adsorb the scraped endometrium through the suction hole 5-7, and then gradually pull out the sampler, repeat the rotation of the scraper 5-6 and the pulling out of the needle tube 1 to achieve sampling of the endometrium at different depths; at the same time, every time the piston is pulled out a section, the regulating valve 3 is opened a little to achieve control of the negative pressure; through the cooperation of the central axis of the regulating tube 2 and the ratchet 2-2, a unidirectional fixed distance rotation is achieved to achieve directional control of the negative pressure value and ensure the integrity of the extracted endometrium.

[0045] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A negative pressure endometrial sampler, characterized in that: It includes a negative pressure adsorption device, a pressure regulating device and a rotatable adsorption tube; The negative pressure adsorption device comprises a needle tube, a piston matching the needle tube, and a guide outlet arranged at the side end of the needle tube; The pressure regulating device comprises a pressure regulating tube and a regulating valve arranged on the pressure regulating tube; the pressure regulating tube is connected to the adsorption port of the needle tube; The rotatable adsorption tube comprises a rotating sleeve and an adsorption tube assembly; the adsorption tube assembly comprises an adsorption tube and a protective tube arranged outside the adsorption tube; a scraper and a suction hole are distributed circumferentially at one end of the adsorption tube away from the rotating sleeve; one end of the rotating sleeve is connected to the pressure regulating tube, and the inside of the other end is rotatably connected with the outer wall of the adsorption tube through a bearing; a rotating block is arranged at the connecting end of the adsorption tube and the rotating sleeve; a movable clamping block is arranged between the protective tube and the rotating block; the rotating block and the protective tube can be magnetically adsorbed; a head is arranged on the top of the adsorption tube; when the clamping block is installed, the protective tube contacts and cooperates with the end face of the head; The regulating valve comprises a central axis, a baffle arranged on the central axis, and a rotating disk arranged at the bottom of the central axis; a ratchet is arranged in an annular manner at the rotation connection between the pressure regulating tube and the rotating disk; a guide rod matching the ratchet is hinged on the rotating disk; a spring is arranged between the guide rod and the rotating disk; a sealing plate for sealing the rotating disk is fixed on the central axis; A slide groove is axially arranged on the outer wall of the adsorption tube; a slide rail matching the slide groove is axially arranged on the inner part of the protection tube.

2. The negative pressure endometrial sampler according to claim 1, characterized in that: The end of the central axis is provided with a rotating rod.

3. The negative pressure endometrial sampler according to claim 1, characterized in that: The top of the sealing head is a flat structure.

4. The negative pressure endometrial sampler according to claim 1, characterized in that: The outer wall of the protection tube is provided with scale lines.

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