Uterine distention electronic mirror

Abstract

The utility model relates to the technical field of medical instruments, in particular to a uterine distention electron microscope which comprises an insertion mechanism, the insertion mechanism comprises an insertion tube assembly and a lens assembly, the insertion tube assembly comprises an inner tube and an outer tube, the outer tube slides on the inner tube so that the lens assembly can be hidden or exposed out of the outer tube, and a gap between the inner tube and the outer tube forms a first channel; the hollow interior of the inner pipe forms a part of a second channel; the uterus expanding mechanism is mounted on the intubation tube assembly and comprises a water injection connecting tube and a suction connecting tube; the pressure detection mechanism comprises a first pressure sensor and a second pressure sensor, the first pressure sensor is connected with the water injection connecting pipe, and the second pressure sensor is connected with the suction connecting pipe; the instrument sensing mechanism is installed outside the second channel and used for sensing surgical instruments entering and exiting the second channel. According to the utility model, the water injection pressure and the suction water outlet pressure can be simultaneously detected, the detection positions are increased, the detection is more accurate, the real pressure in the uterine cavity can be accurately detected, and the uterine distention pressure can be effectively controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to an electronic uterine expansion mirror. Background Art

[0002] The uterine distension electronic scope, also known as the hysteroscope, is a minimally invasive gynecological diagnostic and treatment surgical instrument. The doctor can enter the uterine cavity through the front of the hysteroscope and directly and accurately observe the physiological and pathological changes of the cervical canal, internal cervical os, endometrial cavity and fallopian tube opening. The diseased tissue can also be taken for pathological analysis; at the same time, treatment can also be performed directly under hysteroscopic examination.

[0003] The uterus is a collapsed tubular cavity. In the non-pregnant state, its volume is only five milliliters. When inserting the hysteroscope, uterine distension fluid (normal saline) is needed to distend the uterus. There are several benefits to expanding the uterus, such as avoiding secondary damage caused by the insertion end of the hysteroscope touching the inner wall of the uterus. After distending the uterus, the light is more evenly distributed and the view is clearer. Normal saline uterine distension fluid can play a protective role, but if the cervix is ​​relatively loose, there will be gaps next to it, and the uterine distension fluid will be exposed, making the operating field of view and operation very inconvenient, and it is also not easy to remove.

[0004] In order to detect the pressure in the uterine cavity, existing hysteroscopes usually only install pressure sensors on the injection pipes to detect the internal pressure of the uterine cavity and control uterine distension and suction. However, the pressure sensor setting in such a position is usually unable to accurately detect the actual pressure in the uterine cavity. During use, there is a greater risk that the uterine cavity pressure exceeds the maximum pressure it can withstand, or the injection pressure in the uterine cavity is insufficient, which affects the operator's observation or the performance of uterine cavity surgery. Utility Model Content

[0005] In view of this, the purpose of the present invention is to provide an electronic uterine distension scope to at least solve the problem that existing hysteroscopes are usually unable to accurately detect the actual pressure in the uterine cavity, and there is a greater risk of the uterine cavity pressure exceeding the maximum pressure that can be tolerated during use, or the injection pressure in the uterine cavity is insufficient, which affects the operator's observation or the progress of uterine cavity surgery.

[0006] The utility model solves the above technical problems through the following technical means:

[0007] The utility model provides a uterine expansion electronic mirror, comprising:

[0008] The insertion mechanism includes a cannula assembly and a lens assembly mounted at one end of the cannula assembly. The cannula assembly includes an inner tube and an outer tube slidably mounted on the inner tube. The outer tube slides on the inner tube to hide or expose the lens assembly from the outer tube. The inner tube and the outer tube are eccentrically arranged with a gap between them. The gap between the inner tube and the outer tube constitutes a first passage, and the hollow interior of the inner tube constitutes a portion of a second passage.

[0009] A uterine expansion mechanism is mounted on the cannula assembly, the uterine expansion mechanism comprising a water injection pipe and a suction pipe, the water injection pipe being in communication with the first channel, and the suction pipe being in communication with the second channel;

[0010] The pressure detection mechanism includes a first pressure sensor and a second pressure sensor, wherein the first pressure sensor is connected to the water injection pipe and the second pressure sensor is connected to the suction pipe;

[0011] The instrument sensing mechanism is installed on the outside of the second channel and is used to sense the surgical instruments entering and exiting the second channel.

[0012] In some embodiments, the outer tube has a water outlet at one end close to the lens assembly.

[0013] In some embodiments, the device sensing mechanism comprises:

[0014] A transparent tube, one end of which is sleeved on an end of the inner tube away from the lens assembly, and the other end of which is plugged with a liner tube, the liner tube and the inner tube being coaxially arranged, with a detection gap being defined between the liner tube and the inner tube;

[0015] The photoelectric switch is installed at a position corresponding to the detection gap.

[0016] In some embodiments, the end of the liner away from the lens assembly is connected to a suction tee, the first interface of the suction tee is connected to the liner, the second interface of the suction tee is connected to the suction connecting pipe, and a support tube is provided on the liner.

[0017] In some embodiments, a sealing ring and a guide sleeve are installed in the third interface of the suction tee.

[0018] In some embodiments, the inner tube has an elastic sheet at one end close to the lens assembly, one end of the elastic sheet is connected to the inner tube, and the other end of the elastic sheet is connected to the lens assembly; the lens assembly has an inclined surface at one end facing the cannula assembly, and the outer tube has a support sleeve inside at one end close to the lens assembly, and the support sleeve is mounted on the elastic sheet.

[0019] In some embodiments, the uterine distension electronic scope further comprises:

[0020] A handle housing, wherein one end of the cannula assembly away from the lens assembly is inserted into the handle housing;

[0021] The driving mechanism is used to drive the outer tube to slide on the inner tube. The driving mechanism includes a tube seat slidably installed in the handle housing and a dial button located outside the handle housing. The dial button is fixedly connected to the tube seat, and the end of the outer tube away from the lens assembly is fixed in the tube seat.

[0022] In some embodiments, a sealing sleeve is provided on the inner tube inside the tube seat, a water injection chamber is provided between the sealing sleeve and the tube seat, the water injection chamber is connected to the first channel, and one end of the sealing sleeve seals the water injection chamber; the water injection pipe is connected to the tube seat, and the water injection pipe is connected to the water injection chamber.

[0023] In some embodiments, the uterine expansion electronic mirror also includes: a position sensing mechanism for sensing and determining the position of the tube seat and determining the status of the lens assembly, the position sensing mechanism including a Hall switch, a magnet and an indicator light, the magnet being mounted on the tube seat, and the magnet being mounted opposite to the Hall switch, the indicator light being mounted on the handle housing, the Hall switch being capable of sensing the magnet for determining the position of the tube seat and determining the position of the tube seat through the indicator light.

[0024] In some embodiments, a control board is installed inside the handle housing, the FPC cable in the lens assembly is connected to the control board through the first channel, and the first pressure sensor, the second pressure sensor, the photoelectric switch and the Hall switch are all installed on the control board.

[0025] The utility model's electronic uterine distension scope connects a first pressure sensor to the water injection pipe and a second pressure sensor to the suction pipe, allowing for simultaneous detection of both water injection pressure and water suction pressure. This increases the number of detection locations, making detection more accurate. Pressure values ​​at different locations can be referenced under different conditions, allowing for control of uterine distension using the pressure sensor value closest to the internal pressure of the uterine cavity. This facilitates accurate detection of the true pressure in the uterine cavity and effective control of uterine distension pressure. Furthermore, the design of the instrument's sensing mechanism can detect whether the instrument has successfully entered the second channel, facilitating subsequent surgical operations.

[0026] The utility model of the electronic uterine dilatation scope has an insertion mechanism in which the radial size can be flexibly adjusted, and the radial size of the plug portion of the insertion mechanism can be adjusted simply by moving the tube seat to drive the outer tube to slide, which is convenient and flexible to use. Specifically, the tube seat slides toward the direction close to the lens assembly to drive the outer tube to slide until the outer tube is sleeved on the lens assembly, that is, the lens assembly is hidden in the outer tube to reduce the radial size of the plug end of the insertion mechanism, which is suitable for the insertion mechanism to be inserted into the uterine cavity or withdrawn from the uterine cavity to avoid secondary damage. The tube seat slides toward the direction away from the lens assembly to drive the outer tube to slide until the lens assembly is exposed. At this time, the surgical instrument can be inserted along the inner tube, the surgical instrument extends from the outer tube, and the lens assembly is lifted. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a cross-sectional view of the uterine expansion electronic mirror of the present utility model;

[0028] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure at A in the middle;

[0029] Figure 3 hour Figure 1 Schematic diagram of the enlarged structure at B in the middle;

[0030] Figure 4 It is an enlarged structural diagram of the tube seat;

[0031] Figure 5 It is an enlarged structural diagram of the sealing sleeve;

[0032] Figure 6 It is an enlarged structural diagram of the control panel;

[0033] Among them, the insertion mechanism 100, the cannula assembly 110, the outer tube 111, the inner tube 112, the elastic sheet 1121, the first notch 1122, the lens assembly 120, the support sleeve 130, the water injection pipe 210, the suction pipe 220, the first pressure sensor 310, the second pressure sensor 320, the transparent tube 410, the photoelectric switch 420, the liner 510, the suction tee 520, the support tube 530, the sealing ring 540, the guide sleeve 550, the tube seat 610, the sealing sleeve 611, the dial button 620, the handle housing 700, the Hall switch 810, the magnet 820, the indicator light 830, the control panel 910, the first Luer connector 920, the second Luer connector 930, the detection gap 001, and the water injection chamber 002. DETAILED DESCRIPTION

[0034] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0035] In the specification and claims herein, the terms "first" and "second" are used to distinguish different objects, rather than to describe a specific order of objects. In the description of the embodiments of this application, unless otherwise specified, the meaning of "plurality" refers to two or more. For example, "multiple processing units" refers to two or more processing units, etc., and "multiple components" refers to two or more components, etc.

[0036] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0037] For details, please refer to Figure 1-6 :

[0038] Please refer to Figure 1 The uterine distension electronic scope of the present invention includes an insertion mechanism 100, a uterine distension mechanism, a pressure detection mechanism, and an instrument sensing mechanism. The insertion mechanism 100 includes a cannula assembly 110 and a lens assembly 120 installed at one end of the cannula assembly 110. The cannula assembly 110 is provided with a first channel and a second channel. The uterine distension mechanism is installed on the cannula assembly 110. The uterine distension mechanism includes a water injection pipe 210 and a suction pipe 220. The water injection pipe 210 is connected to the first channel, and the suction pipe 220 is connected to the second channel. The pressure detection mechanism includes a first pressure sensor 310 and a second pressure sensor 320. The first pressure sensor 310 is connected to the water injection pipe 210, and the second pressure sensor 320 is connected to the suction pipe 220. The instrument sensing mechanism is installed on the outside of the second channel and is used to sense the surgical instrument entering and exiting the second channel.

[0039] Through the above technical solution, the first pressure sensor 310 is connected to the water injection pipe 210, and the second pressure sensor 320 is connected to the suction pipe 220. The water injection pressure and the water suction pressure can be detected simultaneously. The detection position is increased, the detection is more accurate, and the pressure values ​​at different positions can be referenced in different states. The value of the pressure sensor closest to the internal pressure of the uterine cavity is used as a reference to control uterine distension, which is conducive to accurately detecting the actual pressure in the uterine cavity and effectively controlling the uterine distension pressure. In addition, the design of the instrument sensing mechanism can sense whether the instrument has successfully entered the second channel to facilitate subsequent surgical operations. For example, during uterine distension, the injected water enters the first channel from the water injection pipe. At this time, the pressure in the water injection pipe is generally slightly higher than the internal pressure of the uterine cavity. At this time, there is no suction in the second channel and there is almost no flowing liquid. The pressure in the second channel is closer to the internal pressure of the uterine cavity. Therefore, during uterine distension, the pressure value of the second pressure sensor 320 is compared with the preset value. When the pressure value of the second pressure sensor 320 reaches the preset value, the uterine distension is completed. Subsequently, the first channel is injected with water and the second channel is suctioned to maintain the internal pressure of the uterine cavity. After uterine distension, the internal pressure of the uterine cavity is maintained, and the surgical instrument is operated. During the operation stage, the flow in the water injection pipe is reduced, and there is a certain pressure inside the uterine cavity. The difference between the pressure inside the uterine cavity and the pressure in the water injection pipe is reduced, but the pressure at the end of the water injection pipe is slightly higher than the uterine cavity. Under the action of the circulating suction negative pressure or the insertion of surgical instruments in the second channel, the pressure of the suction pipe is lower than the internal pressure of the uterine cavity. At this time, the pressure in the water injection pipe is closer to the internal pressure of the uterine cavity, and it is safer to use the first pressure sensor to judge the internal pressure of the uterine cavity. Therefore, at this stage, the pressure value of the first pressure sensor 310 is fed back to the control host, and the control host controls the water injection and suction pressures.

[0040] The cannula assembly 110 comprises an outer tube 111 and an inner tube 112. The outer tube 111 has a water outlet at one end near the lens assembly 120. During uterine dilation, injected water flows through the first channel and the water outlet to smoothly enter the uterine cavity for dilation. The outer tube 111 is slidably mounted over the inner tube 112. The gap between the inner and outer tubes 112 forms the first channel, while the hollow interior of the inner tube 112 forms part of the second channel. Sliding the outer tube 111 over the inner tube 112 allows the lens assembly 120 to be concealed or exposed within the outer tube 111.

[0041] In this embodiment, the first channel is used as the first liquid inlet channel for water injection and the path for the FPC cable. The second channel can be used as the second liquid inlet channel for water injection when the uterus is rapidly dilated. In addition, the second channel can also be used as the suction liquid flow channel and the surgical instrument insertion channel.

[0042] The lens assembly 120 can be in two states: one is that the lens assembly 120 is completely extended from the outer tube 111 and is exposed; the other is that the lens assembly 120 is hidden inside the outer tube 111 and is hidden. The lens assembly 120 is used to obtain images of the interior of the uterus. The lens assembly 120 comprises a camera lens, an LED light, and an FPC cable. The camera lens is used to capture images of the interior of the uterus. The LED light is used to illuminate the interior of the uterus in order to obtain clearer images of the interior of the uterine cavity. The FPC cable is connected to both the camera lens and the LED light. The FPC cable enters the gap between the inner tube 112 and the outer tube 111 from the upper side of the elastic sheet, and is electrically connected to the control board in the handle housing through the outside of the sealing sleeve.

[0043] In order to minimize the radial dimension of the cannula assembly 110 and ensure smooth passage of the FPC cable and unimpeded flow of injected water, the inner tube 112 and the outer tube 111 are arranged eccentrically. The side with the larger gap between the eccentrically arranged inner tube 112 and the outer tube 111 serves as the main cavity of the first channel, which is used as the main circulation channel for the FPC cable to pass through the channel and for water injection.

[0044] The instrument sensing mechanism includes a transparent tube 410 and a photoelectric switch 420. The transparent tube 410 is made of transparent material. One end of the transparent tube 410 is sleeved on the end of the inner tube 112 away from the lens assembly 120. The other end of the transparent tube 410 is plugged with a liner 510. The liner 510 and the inner tube 112 are coaxially arranged. The liner 510 and the inner tube 112 are connected through the transparent tube 410. There is a detection gap 001 between the liner 510 and the inner tube 112. The detection gap 001 is the corresponding position of the middle section of the transparent tube 410; the photoelectric switch 420 is installed at the corresponding position of the detection gap 001.

[0045] The end of the liner 510 away from the lens assembly 120 is connected to a suction tee 520. The first interface of the suction tee 520 is connected to the liner 510, and the second interface of the suction tee 520 is connected to the suction pipe 220. A support tube 530 is sleeved on the liner 510. A sealing ring 540 and a guide sleeve 550 are installed in the third interface of the suction tee 520.

[0046] Suction tee 520, liner 510, transparent tube 410, and inner tube 112 are all connected to form a second channel. A sealing ring 540 is used to seal the end of the second channel away from the lens assembly 120. The design of the guide sleeve 550 facilitates the insertion of surgical instruments into the second channel. When the uterine distension operation is substantially completed, only water needs to be injected into the first channel to maintain intrauterine pressure. When a surgical instrument is inserted into the second channel, a photoelectric switch 420, mounted at a position corresponding to the detection gap between liner 510 and inner tube 112, detects the surgical instrument insertion signal and transmits this signal to the control host. At this point, the pressure in the uterine cavity is determined based on the value of the first pressure sensor 310, and the control host controls the uterine distension to prevent excessive pressure from causing excessive distension.

[0047] Please refer to Figure 1 and Figure 2 The inner tube 112 has an elastic sheet 1121 at one end close to the lens assembly 120, one end of the elastic sheet 1121 is connected to the inner tube 112, and the other end of the elastic sheet 1121 is connected to the lens assembly 120; the end of the lens assembly 120 facing the cannula assembly 110 has an inclined surface, and the outer tube 111 has a support sleeve 130 inside at one end close to the lens assembly 120, and the support sleeve 130 is mounted on the elastic sheet 1121.

[0048] The outer tube 111 slides to expose the lens assembly 120. At this time, the elastic sheet 1121 has two possible states. One is that the elastic sheet 1121 itself has a large elastic force. After the lens assembly 120 extends out of the outer tube 111, the elastic sheet 1121 returns to a straight state and lifts the lens assembly 120; the other is that the elastic sheet 1121 itself has a small elastic force. After the lens assembly 120 extends out of the outer tube 111, the elastic sheet 1121 is still in a deformed and lying state. At this time, the lens assembly 120 can be lifted by a working tool inserted from the inner tube 112.

[0049] In this embodiment, in order to allow the elastic piece 1121 to deform and move better, the inner tube 112 has a first notch 1122 at one end close to the lens assembly 120 , and the elastic piece 1121 is connected to the first notch 1122 .

[0050] The uterine expansion electronic mirror also includes a handle housing 700 and a drive mechanism. The end of the cannula assembly 110 away from the lens assembly 120 is inserted into the handle housing 700. The drive mechanism is used to drive the outer tube 111 to slide on the inner tube 112. Figure 4The drive mechanism includes a tube base 610 slidably mounted within the handle housing 700 and a dial button located outside the handle housing 700. The dial button is fixedly connected to the tube base 610, and the end of the outer tube 111 away from the lens assembly 120 is fixed within the tube base 610. By toggling the dial button 620, the tube base 610 can be driven to slide, and the outer tube 111 can then slide on the inner tube 112 to expose or hide the lens assembly 120. At the same time, the connection between the first channel and the second channel can also be achieved.

[0051] Please refer to Figure 3 A sealing sleeve 611 is provided on the inner tube 112 inside the tube seat 610, and a water injection chamber 002 is provided between the sealing sleeve 611 and the tube seat 610. The water injection chamber 002 is connected to the first channel, and one end of the sealing sleeve 611 seals the water injection chamber 002; the water injection pipe 210 is connected to the tube seat 610, and the water injection pipe 210 is connected to the water injection chamber 002.

[0052] The uterine distention electronic scope also includes a position sensing mechanism for sensing and determining the position of the tube base 610 and determining the status of the lens assembly 120. The position sensing mechanism includes a Hall switch 810, a magnet 820, and an indicator light 830. The magnet 820 is mounted on the tube base 610, and the magnet 820 is mounted opposite the Hall switch 810. The indicator light 830 is mounted on the handle housing 700. The Hall switch 810 can sense the magnet 820 to determine the position of the tube base 610 and determine the position of the tube base 610 through the indicator light 830. The Hall switch 810 causes the indicator light 830 to display different light colors based on the different sensing states of the magnet 820. This embodiment adopts a conventional feedback control circuit design, and then determines the position of the tube base 610 based on the light color of the indicator light 830. At the same time, it can also intuitively determine whether the pressure value of the first pressure sensor 310 or the second pressure sensor 320 is close to the internal pressure of the uterine cavity at the current stage, which facilitates control operation.

[0053] For example, if the tube base 610 is slid toward the direction of the lens assembly 120, the magnet will be away from the Hall switch, and the lens assembly 120 will gradually be hidden in the outer tube 111. At this time, the indicator light 830 will turn yellow. If the tube base 610 is slid away from the lens assembly 120, the magnet will be closer to the Hall switch, and the lens assembly 120 will gradually be exposed from the outer tube 111. At this time, the indicator light 830 will turn green, and the instrument channel will be opened, making it easier for the instrument to enter the uterine cavity to perform related operations and to determine whether the surgical instrument has successfully entered the second channel through the photoelectric switch 420. The color of the light of the indicator light 830 can clearly indicate the position of the tube base 610, and thus clearly indicate the current working status of the uterine distension electronic scope, making it easier for the doctor to perform related operations.

[0054] Please refer to Figure 6A control board 910 is installed inside the handle housing 700. The FPC cable in the lens assembly 120 is connected to the control board 910 through the first channel. The first pressure sensor 310, the second pressure sensor 320, the photoelectric switch 420 and the Hall switch are all installed on the control board 910. The control board 910 is connected to the external control host through a cable.

[0055] The handle housing 700 is also equipped with a first Luer connector 920 and a second Luer connector 930. One end of the first Luer connector 920 is connected to an external suction tube, and the other end is connected to the suction pipe 220 on the suction tee, for aspirating and draining intrauterine fluid. One end of the second Luer connector 930 is connected to an external water injection tube, and the other end is connected to the water injection pipe 210 and the connector of the first pressure sensor 310 via a tee, respectively, for injecting water into the uterine cavity to expand the uterus.

[0056] The above-mentioned embodiment describes a uterine expansion electronic scope, in which the radial dimension of the insertion mechanism 100 can be flexibly adjusted, and the radial dimension of the plug portion of the insertion mechanism 100 can be adjusted simply by moving the tube seat 610 to drive the outer tube 111 to slide, which is convenient and flexible to use. Specifically, the tube seat 610 slides in the direction close to the lens assembly 120 to drive the outer tube 111 to slide until the outer tube 111 is sleeved on the lens assembly 120, that is, the lens assembly 120 is hidden in the outer tube 111 to reduce the radial dimension of the plug end of the insertion mechanism 100, which is suitable for inserting the insertion mechanism 100 into the uterine cavity or removing it from the uterine cavity to avoid secondary damage. The tube seat 610 slides in the direction away from the lens assembly 120 to drive the outer tube 111 to slide until the lens assembly 120 is exposed. At this time, the surgical instrument can be inserted along the inner tube, and the surgical instrument extends from the outer tube 111 and lifts the lens assembly 120.

[0057] The above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and such modifications or equivalent substitutions shall be encompassed by the claims of the present invention. The techniques, shapes, and structural portions not described in detail in the present invention are well known.

Claims

1. Uterine expansion electronic mirror, characterized in that: include: The insertion mechanism includes a cannula assembly and a lens assembly mounted at one end of the cannula assembly. The cannula assembly includes an inner tube and an outer tube slidably mounted on the inner tube. The outer tube slides on the inner tube to hide or expose the lens assembly from the outer tube. The inner tube and the outer tube are eccentrically arranged with a gap between them. The gap between the inner tube and the outer tube constitutes a first passage, and the hollow interior of the inner tube constitutes a portion of a second passage. A uterine expansion mechanism is mounted on the cannula assembly, the uterine expansion mechanism comprising a water injection pipe and a suction pipe, the water injection pipe being in communication with the first channel, and the suction pipe being in communication with the second channel; The pressure detection mechanism includes a first pressure sensor and a second pressure sensor, wherein the first pressure sensor is connected to the water injection pipe and the second pressure sensor is connected to the suction pipe; The instrument sensing mechanism is installed on the outside of the second channel and is used to sense the surgical instruments entering and exiting the second channel.

2. The uterine expansion electronic scope according to claim 1, characterized in that: One end of the outer tube close to the lens assembly is provided with a water outlet.

3. The uterine expansion electronic scope according to claim 2, characterized in that: The device sensing mechanism includes: A transparent tube, one end of which is sleeved on an end of the inner tube away from the lens assembly, and the other end of which is plugged with a liner tube, the liner tube and the inner tube being coaxially arranged, with a detection gap being defined between the liner tube and the inner tube; The photoelectric switch is installed at a position corresponding to the detection gap.

4. The uterine distension electronic scope according to claim 3, characterized in that: One end of the liner tube away from the lens assembly is connected to a suction tee, a first interface of the suction tee is connected to the liner tube, a second interface of the suction tee is connected to the suction connecting pipe, and a support tube is sleeved on the liner tube.

5. The uterine expansion electronic scope according to claim 4, characterized in that: A sealing ring and a guide sleeve are installed in the third interface of the suction tee.

6. The uterine distension electronic scope according to claim 1, characterized in that: The inner tube has an elastic sheet at one end close to the lens assembly, one end of the elastic sheet is connected to the inner tube, and the other end of the elastic sheet is connected to the lens assembly; the lens assembly has an inclined surface at one end facing the cannula assembly, and the outer tube has a support sleeve inside at one end close to the lens assembly, and the support sleeve is mounted on the elastic sheet.

7. The uterine distension electronic scope according to claim 1, characterized in that: The uterine expansion electronic mirror also includes: A handle housing, wherein one end of the cannula assembly away from the lens assembly is inserted into the handle housing; The driving mechanism is used to drive the outer tube to slide on the inner tube. The driving mechanism includes a tube seat slidably installed in the handle housing and a dial button located outside the handle housing. The dial button is fixedly connected to the tube seat, and the end of the outer tube away from the lens assembly is fixed in the tube seat.

8. The uterine distension electronic scope according to claim 7, characterized in that: A sealing sleeve is provided on the inner tube inside the tube seat, and a water injection chamber is provided between the sealing sleeve and the tube seat. The water injection chamber is communicated with the first channel, and one end of the sealing sleeve seals the water injection chamber; the water injection pipe is connected to the tube seat, and the water injection pipe is communicated with the water injection chamber.

9. The uterine distension electronic scope according to claim 8, characterized in that: The uterine expansion electronic mirror also includes: A position sensing mechanism is used to sense and determine the position of the tube socket and the status of the lens assembly. The position sensing mechanism includes a Hall switch, a magnet and an indicator light. The magnet is installed on the tube socket and is installed opposite to the Hall switch. The indicator light is installed on the handle housing. The Hall switch can sense the magnet to determine the position of the tube socket and determine the position of the tube socket through the indicator light.

10. The uterine distension electronic scope according to claim 7, characterized in that: A control board is installed inside the handle housing, the FPC cable in the lens assembly is connected to the control board through the first channel, and the first pressure sensor, the second pressure sensor, the photoelectric switch and the Hall switch are all installed on the control board.

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