Hysteroscope with pressurization function

Abstract

The hysteroscope comprises a handle, a circuit board, a long-strip-shaped insertion part assembled on the handle, a booster pump and an operation key used for controlling the booster pump to work. The insertion part is provided with a liquid inlet channel and a liquid return channel, the circuit board is assembled on the handle, and the handle is provided with a liquid inlet connector and a liquid return connector; the booster pump and the operation key are both assembled on the handle, the inlet end of the booster pump is communicated with the liquid inlet connector, the outlet end of the booster pump is communicated with the liquid inlet channel, the liquid return channel is communicated with the liquid return connector, and the circuit board is electrically connected with the booster pump and the operation key. Therefore, the uterus distention machine or the pressurizing bag can be replaced to achieve easy liquid inlet uterus distention, and operation of the hysteroscope is simplified.

Description

Technical Field

[0001] This utility model relates to a medical device, and more particularly to a hysteroscope with pressurization. Background Technology

[0002] As is well known, hysteroscopy is a minimally invasive gynecological diagnostic and therapeutic instrument used for the diagnosis, treatment, and follow-up of lesions within the uterine cavity. Hysteroscopy not only determines the location, size, appearance, and extent of lesions, but also allows for detailed observation of the tissue structure on the lesion's surface, and enables biopsy or targeted curettage under direct vision, greatly improving the accuracy of diagnosing intrauterine diseases and updating, developing, and compensating for the shortcomings of traditional diagnostic and treatment methods. For most patients suitable for diagnostic curettage, it is more reasonable and effective to first perform hysteroscopy to clarify the location of the lesion before performing biopsy or curettage.

[0003] However, existing hysteroscopes require additional equipment such as a distiller or pressure bag to achieve the desired distending effect when fluid is introduced, which increases the operational complexity of existing hysteroscopes.

[0004] Furthermore, in existing hysteroscopes, there are assembly difficulties and inconveniences between the instrument guide body used to guide external instruments into the inner cylinder and the inner cylinder itself. In addition, because an end-seal is provided between the instrument guide body and the inner cylinder, and the distance between the guide hole of the instrument guide body and the end-seal is relatively large, it is impossible to effectively guide external instruments through the opening in the end-seal, increasing the difficulty of the operation of guiding external instruments through the end-seal into the inner cylinder.

[0005] Therefore, there is an urgent need for a pressurized hysteroscope to overcome one or more of the above-mentioned defects. Utility Model Content

[0006] The purpose of this invention is to provide a hysteroscope with pressure, which can replace the distiller or pressure bag to easily insert fluid for distillering and simplify the operation.

[0007] To achieve the above objectives, the hysteroscope with pressure boosting of this utility model includes a handle, a circuit board, an elongated insertion part mounted on the handle, a pressure boosting pump, and an operation key for controlling the operation of the pressure boosting pump. The insertion part has an inlet channel and a return channel. The circuit board is mounted on the handle, which has an inlet port and a return port. The pressure boosting pump and the operation key are both mounted on the handle. The inlet end of the pressure boosting pump is connected to the inlet port, the outlet end of the pressure boosting pump is connected to the inlet channel, and the return channel is connected to the return port. The circuit board is electrically connected to both the pressure boosting pump and the operation key.

[0008] Compared with the prior art, the hysteroscope of this utility model also includes a booster pump and an operation key mounted on the handle. The inlet end of the booster pump is connected to the liquid inlet interface, the outlet end of the booster pump is connected to the liquid inlet channel, and the return channel is connected to the return interface. The circuit board is electrically connected to the booster pump and the operation key respectively. Therefore, only the operation key needs to be operated when the uterus is distended with liquid, so as to replace the distending machine or pressure bag to easily distend the uterus with liquid, thereby simplifying the operation of the hysteroscope of this utility model.

[0009] Preferably, the hysteroscope of this invention further includes a pressure sensor for detecting the pressure of water flow in the uterine cavity. The pressure sensor is exposed and mounted on the end of the insertion portion away from the handle. The pressure sensor is also electrically connected to the circuit board.

[0010] Preferably, the booster pump is a flow-adjustable booster pump, and the flow rate of the booster pump is adjusted accordingly by the number of times the operation key is operated.

[0011] Preferably, the hysteroscope of this invention further includes a flow regulating valve for adjusting the inflow and / or outflow of fluid, wherein the flow regulating valve is a manual flow regulating valve or an automatic flow regulating valve.

[0012] Preferably, the booster pump, circuit board, and operation keys are each located inside the handle. The inlet and outlet ends of the booster pump are arranged on the same side and face the bottom end of the handle. The liquid inlet and liquid return interfaces are located at the bottom end of the handle. The operation keys are also exposed from the side wall of the handle.

[0013] Preferably, the inlet end of the booster pump is connected to the liquid inlet interface through a first connecting pipe, the outlet end of the booster pump is connected to the liquid inlet channel through a second connecting pipe, and the return channel is connected to the return interface through a third connecting pipe.

[0014] Preferably, the insertion part includes an outer tube, an inner tube, an outer cylinder, an inner cylinder, a sealing ring, and an instrument guide for guiding an external instrument into the inner cylinder; the outer cylinder is assembled inside the handle, the inner cylinder is disposed inside the outer cylinder, and the sealing ring is disposed between the inner cylinder and the outer cylinder. The inner cylinder and the sealing ring together define a liquid inlet space and a liquid return space that are separated from each other within the internal space of the outer cylinder; the inner cylinder also has a side communication hole that connects the internal space of the inner cylinder with the liquid inlet space, and the outer cylinder has a liquid inlet through hole that communicates with the liquid inlet space and a liquid return through hole that communicates with the liquid return space; the tail end of the outer tube is connected to the outer cylinder in a sealed butt-fitting connection; the inner tube is located inside the outer tube, and the tail end of the inner tube extends beyond the tail end of the outer tube. It is also connected to the inner cylinder in a sealed plug-in connection; the internal space of the inner tube, the internal space of the inner cylinder, the side connecting hole, the liquid inlet space, and the liquid inlet through hole together form the liquid inlet channel, and the gap between the outer tube and the inner tube, the liquid return space, and the liquid return through hole together form the liquid return channel; the tail end of the inner cylinder is provided with a plug-in positioning protrusion located in the internal space of the inner cylinder and a side assembly hole communicating with the internal space; the instrument guide body has a guide through hole, which penetrates the head end face and the tail end face of the instrument guide body, and the head end of the instrument guide body is correspondingly provided with a plug-in positioning recess that mates with the plug-in positioning protrusion and a mating hole aligned with the side assembly hole, the mating hole communicating with the guide through hole, and the tail end of the instrument guide body protruding from the handle.

[0015] Preferably, the internal space of the outer cylinder sequentially includes a first internal space and a second internal space connected in a direction away from the outer tube; the lateral dimension of the second internal space is larger than that of the first internal space, so that there is a shoulder between the first internal space and the second internal space; the head end of the inner cylinder extends into the first internal space, and the tail end of the inner cylinder is located outside the second internal space; the inner cylinder is provided with a first protruding ring and a second protruding ring at a position between its head end and tail end, which protrude towards the side wall of the outer cylinder; the first protruding ring is used to block and limit the shoulder; both the first and second protruding rings are provided with annular grooves for the sealing ring to be embedded; the sealing ring also abuts against the side wall of the outer cylinder; and the side connecting hole is located between the first and second protruding rings.

[0016] Preferably, the internal space at the tail end of the inner cylinder has a conical cavity, a first circular cavity, and a second circular cavity along the direction close to the instrument guide body. The first circular cavity is connected between the conical cavity and the second circular cavity, and the diameter of the first circular cavity is smaller than the diameter of the second circular cavity. A first end-sealing member and a second end-sealing member are fitted in the first circular cavity. The first end-sealing member has a spherical cap structure that protrudes into the conical cavity and seals against the side wall of the conical cavity. A guide opening is provided on the spherical cap structure and the second end-sealing member.

[0017] Preferably, the guide hole includes a central through hole penetrating the tail end face of the instrument guide and a blind hole penetrating the head end face of the instrument guide, the diameter of the blind hole being larger than the diameter of the central through hole; the instrument guide is provided with a column located in the blind hole and extending to a position adjacent to the head end face of the instrument guide, the central through hole also penetrating the end face of the column; the mating hole communicates with the blind hole. Attached Figure Description

[0018] Figure 1 This is a three-dimensional view of the hysteroscope of this utility model.

[0019] Figure 2 yes Figure 1 The diagram shown is a three-dimensional exploded view of the hysteroscopy.

[0020] Figure 3 This is a three-dimensional view of the insertion part of the hysteroscope in this utility model.

[0021] Figure 4 yes Figure 3 An exploded three-dimensional view of the insertion section is shown.

[0022] Figure 5 yes Figure 3 The diagram shows the plan view of the insertion section.

[0023] Figure 6 It is along Figure 5 Internal view of the section cut along line AA.

[0024] Figure 7 yes Figure 6 Enlarged view of section B.

[0025] Figure 8 This is a three-dimensional view of the inner tube of the insertion part in the hysteroscope of this utility model.

[0026] Figure 9 yes Figure 8 The diagram shows a plan view of the inner cylinder from front to back.

[0027] Figure 10 It is along Figure 9Internal view of the section cut along the CC line.

[0028] Figure 11 This is a three-dimensional view of the instrument guide body of the insertion part in the hysteroscope of this utility model.

[0029] Figure 12 yes Figure 11 The diagram shows a plan view of the guiding device viewed from its tail end towards its head end.

[0030] Figure 13 It is along Figure 12 Internal view of the section cut along the DD line. Detailed Implementation

[0031] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to specific implementation examples and accompanying drawings, and the technical solutions of this utility model will be explained. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below. Embodiments of this utility model will now be described with reference to the accompanying drawings, in which similar element reference numerals represent similar elements.

[0032] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0033] Please see Figure 1 and Figure 2The hysteroscope 100 of this utility model includes a handle 10, a circuit board 20, an elongated insertion part 30 mounted on the handle 10, a booster pump 40 mounted on the handle 10, and an operation key 50 for controlling the operation of the booster pump 40. The operation key 50 is mounted on the handle 10, and the handle 10 provides support for the operation key 50. Optionally, in Figure 1 and Figure 2 In the example shown, operation key 50 is a mechanical button. Obviously, depending on actual needs, operation key 50 can also be designed as a touch-sensitive function key, so it is not considered a mechanical button. Figure 1 and Figure 2 The diagram shown is for illustrative purposes only. Additionally, the operation button 50 is also located inside the handle 10 and protrudes from the side wall 14 of the handle 10, allowing the operator to press the operation button 50 while holding the handle 10 with one hand. This makes the operation of the hysteroscope 100 of this invention more convenient. Obviously, depending on actual needs, the operation button 50 can also be located in other suitable positions on the handle 10, so it is not limited to... Figure 1 and Figure 2 The above is the limit.

[0034] Meanwhile, the circuit board 20 is mounted on the handle 10, which provides support for the circuit board 20. The circuit board 20 is also electrically connected to the booster pump 40 and the operation key 50. Optionally, it can be combined with... Figure 1 and Figure 2 As an example, the circuit board 20 is located inside the handle 10, and is protected by being hidden by the handle 10. Obviously, depending on actual needs, the circuit board 20 can also be arranged in other suitable positions on the handle 10, so it is not considered... Figure 1 and Figure 2 The above is the limit.

[0035] Furthermore, the handle 10 is equipped with an inlet port 11 and a return port 12, which can be optionally configured to... Figure 1 In this example, the inlet port 11 and the return port 12 are located at the bottom end 13 of the handle 10. This design does not affect the operator's grip on the handle 10. Obviously, depending on actual needs, the inlet port 11 and the return port 12 can also be arranged in other suitable positions on the handle 10, so this is not the case. Figure 1 The above is the limit.

[0036] Combined Figure 7 The insertion part 30 has an inlet channel 30a and a return channel 30b to meet the needs of external cleaning fluid flowing into the uterine cavity through the inlet channel 30a and the fluid discharged from the uterine cavity after cleaning through the return channel 30b. The booster pump 40 is mounted on the handle 10, which provides support for the booster pump 40; alternatively, it can be combined with... Figure 1 and Figure 2As an example, the booster pump 40 is located inside the handle 10, which conceals and protects the booster pump 40. Obviously, depending on actual needs, the booster pump 40 can also be arranged in other suitable positions on the handle 10, so it is not considered... Figure 1 and Figure 2 As shown, the inlet end 41 of the booster pump 40 is connected to the inlet interface 11, the outlet end 42 of the booster pump 40 is connected to the inlet channel 30a, and the return channel 30b is connected to the return interface 12, to meet the need for the booster pump 40 to pressurize the fluid delivered into the uterine cavity; alternatively, in Figure 2 In this example, the inlet end 41 and outlet end 42 of the booster pump 40 are arranged on the same side and face the bottom end 13 of the handle 10. This design makes the wiring between the booster pump 40 and the inlet interface 11, the booster pump 40 and the inlet channel 30a, and the return channel 30b and the return interface 12 neater and simpler. Obviously, depending on actual needs, the inlet end 41 and outlet end 42 of the booster pump 40 can also be arranged on opposite sides, so it is not necessary to consider... Figure 2 The above is a limited description. More specifically, as follows:

[0037] Combination Figure 1 , Figure 2 and Figure 6 As an example, the hysteroscope 100 of this invention also includes a pressure sensor 60 for detecting the pressure of water flow within the uterine cavity. The pressure sensor 60 is mounted exposed on the end of the insertion portion 30 away from the handle 10, for example, but not limited to... Figure 6 At the left end of the insertion part 30, the pressure sensor 60 is also electrically connected to the circuit board 20; therefore, with the help of the pressure sensor 60, the water pressure in the uterine cavity can be detected in real time, and the detected signal can be fed back to the circuit board 20. When the pressure sensor 60 is added to the hysteroscope 100 of this invention, the booster pump 40 can be designed as a flow-adjustable booster pump to allow the operator to adjust the flow rate of the booster pump 40 according to the number of times the operation key 50 is pressed. For example, two consecutive presses of the operation key 50 can be set to adjust the output flow rate of the booster pump 40, and one press of the operation key 50 can be set to control the start and stop of the booster pump 40. Obviously, depending on actual needs, a flow regulating valve (not shown in the figure) can also be added to adjust the inflow and / or outflow of fluid. This flow regulating valve can be a manual flow regulating valve or an automatic flow regulating valve.

[0038] like Figure 2As shown, as an example, the inlet end 41 of the booster pump 40 is connected to the liquid inlet interface 11 through the first connecting pipe 81, the outlet end 42 of the booster pump 40 is connected to the liquid inlet channel 30a through the second connecting pipe 82, and the liquid return channel 30b is connected to the liquid return interface 12 through the third connecting pipe 83. Alternatively, as an example, the first connecting pipe 81, the second connecting pipe 82, and the third connecting pipe 83 are all flexible hoses, which makes it easier to assemble the first connecting pipe 81, the second connecting pipe 82, and the third connecting pipe 83.

[0039] Combining 2 to Figure 6 As an example, the insertion part 30 includes an outer tube 33, an inner tube 34, an outer cylinder 35, an inner cylinder 36, a sealing ring 37, and an instrument guide 38 for guiding an external instrument into the inner cylinder 36. The outer cylinder 35 is fitted inside the handle 10, and the handle 10 provides support for the outer cylinder 35. The inner cylinder 36 is located inside the outer cylinder 35, and the sealing ring 37 is located between the inner cylinder 36 and the outer cylinder 35. The inner cylinder 36 and the sealing ring 37 together define the internal space 351 of the outer cylinder 35 into a liquid inlet space 3511 and a liquid return space 3512 that are separated from each other. The inner cylinder 36 is also provided with a side communication hole 362 that connects the internal space 361 of the inner cylinder 36 with the liquid inlet space 352. The tail end 36b of the inner cylinder 36 is provided with an interlocking positioning protrusion 363 located in the internal space 361 of the inner cylinder 36 and a side assembly hole 364 that connects with the internal space 361. The outer cylinder 35 is provided with a liquid inlet through hole 352 that connects with the liquid inlet space 3511 and a liquid return through hole 353 that connects with the liquid return space 3512.

[0040] Combined Figure 7 As an example, the tail end 331 of the outer tube 33 is connected to the outer cylinder 35 in a sealed plug-in connection to achieve the purpose of fixing and sealing between the tail end 331 of the outer tube 33 and the outer cylinder 35. The inner tube 34 is located inside the outer tube 33, and the tail end 341 of the inner tube 34 extends out of the tail end 331 of the outer tube 33. The tail end 341 of the inner tube 34 is also connected to the inner cylinder 36 in a sealed plug-in connection to achieve the purpose of fixing and sealing between the tail end 341 of the inner tube 34 and the inner cylinder 36. At this time, the internal space 341 of the inner tube 34, the internal space 361 of the inner cylinder 36, the side connecting hole 362, the liquid inlet space 3511 and the liquid inlet through hole 352 together form the aforementioned liquid inlet channel 30a; the gap 30c between the outer tube 33 and the inner tube 34, the liquid return space 3512 and the liquid return through hole 353 together form the aforementioned liquid return channel 30b.

[0041] The instrument guide body 38 has a guide hole 381 inside, which passes through the head end face 382 and the tail end face 383 of the instrument guide body 38. The head end 38a of the instrument guide body 38 is correspondingly provided with an interlocking positioning recess 384 that mates with the interlocking positioning protrusion 363 and a mating hole 385 that aligns with the side assembly hole 364. The mating hole 385 communicates with the guide hole 381. The tail end 38b of the instrument guide body 38 is exposed on the handle 10. Therefore, with the help of the interlocking positioning protrusion 363 and the interlocking positioning recess 384, the assembly and disassembly of the instrument guide body 38 and the inner cylinder 36 are more convenient.

[0042] In order to further improve the ease of assembly between the instrument guide body 38 and the inner cylinder 36, and to improve the reliability of the seal between the inner cylinder 36 and the outer cylinder 35, in Figure 7 In this example, the inner space 351 of the outer cylinder 35 sequentially includes a first inner space 351a and a second inner space 351b connected together in a direction away from the outer tube 33. The lateral dimension of the second inner space 351b is larger than that of the first inner space 351a, so that there is a shoulder 351c between the first inner space 351a and the second inner space 351b. At this time, the head end 36a of the inner cylinder 36 extends into the first inner space 351a, and the tail end 36b of the inner cylinder 36 is located in the second inner space. Outside space 351b, the inner cylinder 36, located between its head end 36a and tail end 36b, has a first protruding ring 365 and a second protruding ring 366 protruding towards the side wall 354 of the outer cylinder 35. The first protruding ring 365 is used to block and limit the movement against the shoulder 351c. Both the first protruding ring 365 and the second protruding ring 366 have annular grooves 367 for the sealing ring 37 to be embedded. The sealing ring 37 also abuts against the side wall 354 of the outer cylinder 35. The side connecting hole 362 is located between the first protruding ring 365 and the second protruding ring 366, as shown in the figure. Figure 7 As shown; therefore, during the process of the inner cylinder 36 being installed into the outer cylinder 35, the head end 36a of the inner cylinder 36 is quickly and accurately installed into the first internal space 351a by means of the blocking cooperation between the first convex ring 365 and the shoulder 351c, thus simplifying the assembly process.

[0043] Additionally, in combination Figure 7 , Figure 8 and Figure 10As an example, the internal space of the tail end 36b of the inner cylinder 36 has a conical cavity 3611, a first circular cavity 3612, and a second circular cavity 3613 along the direction close to the instrument guide body 38. The first circular cavity 3612 is connected between the conical cavity 3611 and the second circular cavity 3613, and the diameter of the first circular cavity 3612 is smaller than the diameter of the second circular cavity 3613. A first end seal 391 and a second end seal 392 are fitted in the first circular cavity 3612. The first end seal 391 has a spherical cap structure 3911 that protrudes into the conical cavity 3611 and seals against the side wall 368 of the conical cavity 3611 to improve the reliability of the seal between the first end seal 391 and the side wall 368 of the conical cavity 3611. A guide opening 3912 (3921) is provided on the spherical cap structure 3911 and the second end seal 392.

[0044] In addition, combined Figure 6 , Figure 7 , Figure 11 and Figure 13 As an example, the guide hole 381 includes a central through hole 3811 penetrating the tail end face 383 of the instrument guide body 38 and a blind hole 3812 penetrating the head end face 382 of the instrument guide body 38. The diameter of the blind hole 3812 is larger than the diameter of the central through hole 3811. The instrument guide body 38 is provided with a column 38c located in the blind hole 3812 and extending to a position adjacent to the head end face 382 of the instrument guide body 38. The central through hole 3811 also penetrates the end face 38c1 of the column 38c. At this time, the mating hole 385 communicates with the blind hole 3812, as shown in the figure. Figure 11 and Figure 13 As shown; therefore, by means of the column 38c located in the blind hole 3812 and extending to the position adjacent to the head end face 382 of the instrument guide 38, the central through hole 3811 is lengthened, effectively reducing the suspension length of the external instrument that passes through the central through hole 3811 but does not pass through the second end seal 3912, thereby improving the reliability of the operation of the external instrument passing through the two openings 3912 (3921) of the second end seal 3912 and the first end seal 3911 in sequence.

[0045] Compared with the prior art, the hysteroscope 100 of this utility model also includes a booster pump 40 and an operation key 50 each mounted on the handle 10. The inlet end 41 of the booster pump 40 is connected to the liquid inlet interface 11, the outlet end 42 of the booster pump 40 is connected to the liquid inlet channel 30a, the return channel 30b is connected to the return interface 12, and the circuit board 20 is electrically connected to the booster pump 40 and the operation key 50 respectively. Therefore, when performing liquid inlet distension, only the operation key 50 needs to be operated, so as to replace the distension machine or pressure bag to achieve easy liquid inlet distension, thereby simplifying the operation of the hysteroscope 100 of this utility model.

[0046] It should be noted that, in order to facilitate the assembly of the components inside the handle 10, the handle 10 is made into two parts, which are connected together by an assembly method; in addition, when the lateral mounting hole 364 is aligned with the mating hole 385, the inner cylinder 36 and the instrument guide 38 can be connected together by inserting a fastener into both the lateral mounting hole 364 and the mating hole 385.

[0047] It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims. Furthermore, the embodiments disclosed above are merely preferred embodiments of this utility model and should not be construed as limiting the scope of this utility model. Therefore, equivalent variations made within the scope of the claims of this utility model are still within the scope of this utility model.

Claims

1. A pressurized hysteroscope, comprising a handle, a circuit board, and an elongated insertion portion mounted on the handle, the insertion portion having an inlet channel and a return channel, the circuit board being mounted on the handle, the handle having an inlet port and a return port, characterized in that, The pressurized hysteroscope also includes a pressurizing pump and an operating key for controlling the operation of the pressurizing pump. The pressurizing pump and the operating key are both mounted on the handle. The inlet end of the pressurizing pump is connected to the inlet interface, the outlet end of the pressurizing pump is connected to the inlet channel, the return channel is connected to the return interface, and the circuit board is electrically connected to the pressurizing pump and the operating key respectively.

2. The pressurized hysteroscope according to claim 1, characterized in that, It also includes a pressure sensor for detecting the pressure of water flow in the uterine cavity, the pressure sensor being exposedly mounted on the end of the insertion portion away from the handle, and the pressure sensor being electrically connected to the circuit board.

3. The pressurized hysteroscope according to claim 2, characterized in that, The booster pump is a flow-adjustable booster pump, and the flow rate of the booster pump is adjusted accordingly by the number of times the operation key is operated.

4. The pressurized hysteroscope according to claim 2, characterized in that, It also includes a flow control valve for adjusting the inlet and / or return flow rates, which may be a manual or automatic flow control valve.

5. The pressurized hysteroscope according to claim 1, characterized in that, The booster pump, circuit board, and operation keys are each located inside the handle. The inlet and outlet ends of the booster pump are arranged on the same side and face the bottom end of the handle. The liquid inlet and liquid return interfaces are located at the bottom end of the handle. The operation keys are also exposed from the side wall of the handle.

6. The pressurized hysteroscope according to claim 5, characterized in that, The inlet end of the booster pump is connected to the liquid inlet interface through a first connecting pipe, the outlet end of the booster pump is connected to the liquid inlet channel through a second connecting pipe, and the return channel is connected to the return interface through a third connecting pipe.

7. The hysteroscope with pressurization according to claim 1, characterized in that, The insertion part includes an outer tube, an inner tube, an outer cylinder, an inner cylinder, a sealing ring, and an instrument guide for guiding an external instrument into the inner cylinder. The outer cylinder is fitted inside the handle, the inner cylinder is located inside the outer cylinder, and the sealing ring is located between the inner cylinder and the outer cylinder. The inner cylinder and the sealing ring together define a liquid inlet space and a liquid return space that are separated from each other within the internal space of the outer cylinder. The inner cylinder also has a side communication hole that connects its internal space with the liquid inlet space. The outer cylinder has a liquid inlet hole that communicates with the liquid inlet space and a liquid return hole that communicates with the liquid return space. The tail end of the outer tube is sealed to the outer cylinder in a butt-fitting connection. The inner tube is located inside the outer tube, and its tail end extends beyond the tail end of the outer tube. The tail end of the inner tube is also connected to... The inner cylinder is sealed with a mating connection; the internal space of the inner tube, the internal space of the inner cylinder, the side connecting hole, the liquid inlet space, and the liquid inlet through hole together form the liquid inlet channel; the gap between the outer tube and the inner tube, the liquid return space, and the liquid return through hole together form the liquid return channel; the tail end of the inner cylinder is provided with a mating positioning protrusion located in the internal space of the inner cylinder and a side assembly hole communicating with the internal space; the instrument guide body has a guide through hole, which penetrates the head end face and the tail end face of the instrument guide body; the head end of the instrument guide body is correspondingly provided with a mating positioning recess that mates with the mating positioning protrusion and a mating hole aligned with the side assembly hole, the mating hole communicating with the guide through hole; the tail end of the instrument guide body is exposed on the handle.

8. The pressurized hysteroscope according to claim 7, characterized in that, The inner space of the outer cylinder comprises, in a direction away from the outer tube, a first inner space and a second inner space that are connected and interlocked. The lateral dimension of the second inner space is larger than that of the first inner space, so that there is a shoulder between the first inner space and the second inner space. The head end of the inner cylinder extends into the first inner space, and the tail end of the inner cylinder is located outside the second inner space. The inner cylinder is provided with a first protruding ring and a second protruding ring at a position between its head end and tail end, which protrude towards the side wall of the outer cylinder. The first protruding ring is used to block and limit the movement with the shoulder. Both the first and second protruding rings are provided with annular grooves for the sealing ring to be embedded. The sealing ring also abuts against the side wall of the outer cylinder. The side connecting hole is located between the first and second protruding rings.

9. The pressurized hysteroscope according to claim 8, characterized in that, The inner cylinder has a conical cavity, a first circular cavity, and a second circular cavity in the internal space at the tail end of the inner cylinder along the direction close to the instrument guide. The first circular cavity is connected between the conical cavity and the second circular cavity, and the diameter of the first circular cavity is smaller than the diameter of the second circular cavity. A first end-sealing member and a second end-sealing member are fitted in the first circular cavity. The first end-sealing member has a spherical cap structure that protrudes into the conical cavity and seals against the side wall of the conical cavity. A guide opening is provided on the spherical cap structure and the second end-sealing member.

10. The pressurized hysteroscope according to claim 8, characterized in that, The guide hole includes a central through hole penetrating the tail end face of the instrument guide and a blind hole penetrating the head end face of the instrument guide, the diameter of the blind hole being larger than the diameter of the central through hole; the instrument guide is provided with a column located in the blind hole and extending to a position adjacent to the head end face of the instrument guide, the central through hole also penetrating the end face of the column; the mating hole communicates with the blind hole.

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