Endometrial hot steam ablation uterine cavity pressure relief device and steam ablation equipment

Abstract

The utility model relates to the technical field of medical instruments, and provides an endometrium hot steam ablation uterine cavity pressure relief device and steam ablation equipment, the pressure relief device comprises a pressure relief valve body, a valve assembly and a return elastic piece, and the pressure relief valve body is provided with a pressure relief valve cavity, a pressure relief inlet and a pressure relief outlet; the valve assembly can move relative to the pressure relief valve cavity so as to be switched between a sealing position and a pressure relief position, the return elastic piece is arranged between the valve assembly and the pressure relief valve body, and the return elastic piece is used for driving the valve assembly to return to the sealing position. When the pressure is larger than the set pressure of the pressure relief device, the valve assembly moves to the pressure relief position, the valve assembly is separated from the pressure relief inlet, and the return elastic piece deforms, so that the pressure relief inlet is communicated with the pressure relief outlet through the pressure relief valve cavity to start the pressure relief work, and the pressure in the uterine cavity is in a normal pressure range; therefore, the risk of tissue injury caused by steam invading the fallopian tube is avoided, and the safety of the steam ablation equipment is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a device for relieving intrauterine pressure during endometrial thermal steam ablation and a steam ablation equipment. Background Technology

[0002] Endometrial ablation is a surgical procedure used to treat abnormal uterine bleeding (AUB), especially for patients without structural lesions such as uterine fibroids or adenomyosis, and for whom drug therapy has been ineffective. This type of surgery applies energy to the endometrium, reducing menstrual flow or even causing amenorrhea by inhibiting endometrial function. Surgical methods include using radiofrequency, microwave, thermoballoon, and cryoablation techniques to ablate the endometrium.

[0003] When using steam ablation for treatment, it is essential to ensure that the pressure inside the uterine cavity is maintained within a set range during the treatment process. Exceeding this range may cause the fallopian tubes to open, thus posing a risk of burns.

[0004] However, the steam ablation system in this technology cannot release pressure in time when the intrauterine pressure increases during treatment, posing a risk of steam leakage and burns to the fallopian tubes. Utility Model Content

[0005] This invention provides a device for relieving intrauterine pressure during endometrial thermal steam ablation, which solves the problem in related technologies where steam ablation systems cannot relieve pressure in time when intrauterine pressure increases during treatment, posing a risk of steam leakage and burns to the fallopian tubes.

[0006] This utility model provides a device for relieving intrauterine pressure during endometrial thermal steam ablation, comprising:

[0007] The pressure relief valve body is provided with a pressure relief valve chamber, a pressure relief inlet and a pressure relief outlet, wherein the pressure relief inlet and the pressure relief outlet are both connected to the pressure relief valve chamber;

[0008] A valve assembly is movably disposed within the pressure relief valve chamber, and the valve assembly is movable relative to the pressure relief valve chamber to switch between a sealing position and a pressure relief position;

[0009] A return elastic element is disposed between the valve assembly and the pressure relief valve body, and the return elastic element is used to drive the valve assembly back to the sealing position;

[0010] In the sealed position, the valve assembly contacts the pressure relief inlet to block the communication between the pressure relief inlet and the pressure relief outlet;

[0011] In the pressure relief position, the valve assembly is separated from the pressure relief inlet to connect the pressure relief inlet and the pressure relief outlet.

[0012] According to the present invention, a device for relieving intrauterine pressure during endometrial thermal steam ablation is provided, wherein the valve assembly includes:

[0013] A valve component, movably disposed in the pressure relief valve chamber, the valve component being used to block the pressure relief inlet;

[0014] The first sealing ring is disposed on the valve component and located at one end of the valve component near the pressure relief inlet. The first sealing ring is used to seal the fitting gap between the valve component and the inner wall of the pressure relief valve cavity.

[0015] The return elastic element is connected to the valve element.

[0016] According to the present invention, a device for relieving intrauterine pressure by hot steam ablation of endometrium is provided, wherein the valve component is provided with a first positioning groove, the first sealing ring is sleeved on the valve component, and a portion of the structure of the first sealing ring is located within the first positioning groove.

[0017] According to the present invention, a pressure relief device for endometrial thermal steam ablation of uterine cavity is provided, wherein the return elastic element is a return spring, one end of which is connected to the valve assembly and the other end is connected to the pressure relief valve body.

[0018] According to the present invention, a pressure relief device for endometrial thermal steam ablation of uterine cavity pressure is provided, wherein the pressure relief valve body comprises:

[0019] A first valve body, wherein the first valve body is provided with the pressure relief valve chamber and the pressure relief inlet;

[0020] A second valve body is connected to the first valve body, and the second valve body is provided with the pressure relief outlet;

[0021] The end of the return elastic member away from the valve assembly is connected to the second valve body.

[0022] According to the present invention, a device for relieving intrauterine pressure by endometrial hot steam ablation is provided, wherein the first valve body and the second valve body are nested together.

[0023] According to the present invention, a device for relieving intrauterine pressure by hot steam ablation of the endometrium is provided, wherein one of the first valve body and the second valve body is provided with an internal thread, and the other is provided with an external thread that is threadedly connected to the internal thread.

[0024] According to the present invention, a device for relieving intrauterine pressure by hot steam ablation of the endometrium is provided. The first valve body is provided with a glue inlet, which is used to inject glue to form a sealing glue layer between the first valve body and the second valve body.

[0025] According to the present invention, a pressure relief device for endometrial thermal steam ablation of uterine cavity pressure is provided, wherein the pressure relief valve body further includes a second sealing ring;

[0026] One of the first valve body and the second valve body is provided with a second positioning groove, and a portion of the structure of the second sealing ring is located in the second positioning groove. The second sealing ring is used to seal the mating gap between the first valve body and the second valve body.

[0027] This utility model also provides a steam ablation device, comprising:

[0028] The steam melting handle has a first channel and a second channel;

[0029] A balloon is disposed at one end of the steam ablation handle, and both the first channel and the second channel are connected to the balloon.

[0030] A steam generating module, wherein the steam output end of the steam generating module is connected to the end of the first channel away from the balloon;

[0031] The aforementioned endometrial thermal steam ablation intrauterine pressure relief device has its pressure relief inlet connected to the end of the second channel away from the balloon.

[0032] The endometrial thermal steam ablation intrauterine pressure relief device provided by this utility model has a valve assembly that contacts the pressure relief inlet to block the connection between the pressure relief inlet and the pressure relief outlet, and the valve assembly is returned to its sealed position by a return elastic element.

[0033] During treatment, as the amount of steam increases, the pressure inside the uterine cavity will increase. When the pressure exceeds the set pressure of the pressure relief device, the valve assembly moves to the pressure relief position, the valve assembly separates from the pressure relief inlet, and the return elastic element deforms, so that the pressure relief inlet connects to the pressure relief outlet through the pressure relief valve cavity to start the pressure relief operation. This helps to keep the pressure inside the uterine cavity within the normal pressure range, so as to avoid the risk of tissue damage caused by steam invading the fallopian tubes, and greatly improves the safety of the steam ablation equipment. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram showing the combination of the uterus and the steam ablation device provided by this utility model.

[0036] Figure 2 This is a structural schematic diagram of the pressure relief device provided by this utility model.

[0037] Figure 3 This is a cross-sectional schematic diagram of the pressure relief device provided by this utility model.

[0038] Figure 4 This is an exploded view of the pressure relief device provided by this utility model.

[0039] Figure label:

[0040] 100. Pressure relief valve body; 110. First valve body; 111. Pressure relief valve chamber; 112. Pressure relief inlet; 113. Internal thread; 114. Glue filling port; 115. Indicator mark; 120. Second valve body; 121. Pressure relief outlet; 122. External thread; 123. Second positioning groove; 130. Second sealing ring; 200. Valve assembly; 210. Valve component; 220. First sealing ring; 211. First positioning groove; 300. Return elastic element; 400. Steam ablation handle; 410. First channel; 420. Second channel; 500. Balloon; 600. Steam generating module; 700. Uterus; 710. Fallopian tube. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0042] It should be noted that during the treatment process, when using steam ablation, it is necessary to ensure that the intrauterine pressure is within the range of 20mmHg-52mmHg. If this range is exceeded, the fallopian tube 710 will open, and hot steam will invade the fallopian tube 710, thereby causing the risk of tissue damage.

[0043] The following is combined Figures 1-4 This invention describes a device for relieving intrauterine pressure during endometrial thermal steam ablation and a steam ablation equipment.

[0044] Reference Figure 1In some embodiments of this utility model, this utility model also provides a steam ablation device, including a steam ablation handle 400, a balloon 500, a steam generating module 600, and the aforementioned endometrial hot steam ablation intrauterine pressure relief device. The steam ablation handle 400 is provided with a first channel 410 and a second channel 420. The balloon 500 is located at one end of the steam ablation handle 400. Both the first channel 410 and the second channel 420 are connected to the balloon 500. The steam output end of the steam generating module 600 is connected to the end of the first channel 410 away from the balloon 500.

[0045] Understandably, referring to Figures 2 to 4 This utility model provides a pressure relief device for endometrial thermal steam ablation of uterine cavity pressure, including a pressure relief valve body 100, a valve assembly 200, and a return elastic element 300. The pressure relief valve body 100 is provided with a pressure relief valve cavity 111, a pressure relief inlet 112, and a pressure relief outlet 121, both of which are connected to the pressure relief valve cavity 111. The valve assembly 200 is movably disposed within the pressure relief valve cavity 111 and is movable relative to the pressure relief valve cavity 111 to switch between a sealed position and a pressure relief position. The return elastic element 300 is disposed between the valve assembly 200 and the pressure relief valve body 100 and is used to drive the valve assembly 200 back to the sealed position.

[0046] In the sealed position, valve assembly 200 contacts the pressure relief inlet 112 to block the communication between the pressure relief inlet 112 and the pressure relief outlet 121; in the pressure relief position, valve assembly 200 is separated from the pressure relief inlet 112 to allow the pressure relief inlet 112 and the pressure relief outlet 121 to be connected.

[0047] The endometrial thermal steam ablation intrauterine pressure relief device provided by this utility model has a valve assembly 200 in contact with the pressure relief inlet 112 to block the connection between the pressure relief inlet 112 and the pressure relief outlet 121, and the valve assembly 200 is returned to its sealed position by the return elastic member 300.

[0048] During treatment, as the amount of steam increases, the pressure inside the uterine cavity will increase. When the pressure exceeds the set pressure of the pressure relief device, the valve assembly 200 moves to the pressure relief position, the valve assembly 200 separates from the pressure relief inlet 112, and the return elastic element 300 deforms, so that the pressure relief inlet 112 is connected to the pressure relief outlet 121 through the pressure relief valve cavity 111 to start the pressure relief operation. This helps to keep the pressure inside the uterine cavity within the normal pressure range, so as to avoid the risk of tissue damage caused by steam invading the fallopian tube 710, and greatly improve the safety of the steam ablation device.

[0049] Understandably, referring to Figure 1In some embodiments of this utility model, the pressure relief inlet 112 of the pressure relief valve body 100 is connected to the end of the second channel 420 away from the balloon 500. Specifically, the pressure relief inlet 112 of the pressure relief valve body 100 can be connected to the second channel 420 of the steam ablation handle 400 through a pipeline.

[0050] It should be noted that, along the left-right direction of the steam ablation handle 400, the part of the steam ablation handle 400 closest to the uterus 700 is the front end, and the part furthest from the uterus 700 is the end end. The pressure relief device is installed at the end. Steam forms a steam circuit through the first channel 410, the second channel 420, and the balloon 500. The balloon 500 seals the cervical canal, and at this time, the uterine cavity of the uterus 700 is in a relatively sealed state. When depressurizing, steam flows from the first channel 410 into the balloon 500, then through the balloon 500 into the second channel 420, and then through the second channel 420 into the pressure relief inlet 112 and the pressure relief valve chamber 111, and finally is discharged to the outside through the pressure relief outlet 121. When the pressure is greater than the set pressure of the pressure relief device, the pressure relief is activated, so that the uterine cavity is always within the normal pressure range, greatly improving the safety of the ablation equipment.

[0051] Understandably, referring to Figure 3 and Figure 4 In some embodiments of this utility model, the valve assembly 200 includes a valve component 210 and a second sealing ring 130. The valve component 210 is movably disposed in the pressure relief valve chamber 111 and is used to block the pressure relief inlet 112. The first sealing ring 220 is disposed on the valve component 210 and is located at one end of the valve component 210 near the pressure relief inlet 112. The first sealing ring 220 is used to seal the fitting gap between the valve component 210 and the inner wall of the pressure relief valve chamber 111.

[0052] The return elastic element 300 is connected to the valve element 210.

[0053] The mechanical seal and pressure relief mode are formed by the cooperation of valve component 210, first sealing ring 220, and return elastic element 300. In the initial state of the pressure relief device, that is, when valve component 210 is in the sealed position, valve component 210 blocks the pressure relief inlet 112 of the pressure relief valve body 100, and the first sealing ring 220 achieves a sealing fit. When the pressure exceeds the set pressure, the first sealing ring 220 moves with valve component 210 to the pressure relief position, valve component 210 separates from the pressure relief inlet 112, and the return elastic element 300 deforms, allowing the pressure relief inlet 112 to connect to the pressure relief outlet 121 through the pressure relief valve cavity 111, thus initiating the pressure relief operation and helping to keep the pressure inside the uterine cavity within the normal pressure range.

[0054] The mechanical pressure relief structure solves the problem of fallopian tube 710 being opened and burned due to excessive intracavitary pressure during endometrial thermal steam ablation. Compared with the electronic pressure relief mode, the mechanical mode is more reliable, simple and reliable in pressure relief, and has better sealing performance.

[0055] Of course, in other examples, the valve component 210 described above may also be rotatably disposed in the pressure relief valve chamber 111.

[0056] Reference Figure 3 In some examples, the cross-sectional area of ​​the valve component 210 is larger than that of the pressure relief inlet 112, which helps to ensure that the pressure relief inlet 112 is blocked, effectively reducing potential leakage paths and thus lowering the likelihood of leakage. Of course, in other examples, the cross-sectional area of ​​the valve component 210 is equal to that of the pressure relief inlet 112 to block the pressure relief inlet 112.

[0057] Reference Figure 3 In some examples, the valve component 210 is provided with a first positioning groove 211, the first sealing ring 220 is sleeved on the valve component 210, and part of the structure of the first sealing ring 220 is located in the first positioning groove 211.

[0058] With the above configuration, part of the structure of the first sealing ring 220 is located in the first positioning groove 211, and the other part of the structure, namely the outer ring area, abuts against the inner wall of the pressure relief valve cavity 111 of the pressure relief valve body 100 to achieve sealing. The first positioning groove 211 provides an installation position for the first sealing ring 220, preventing the axial movement of the first sealing ring 220. The structure is simple and the positioning is reliable, providing stability and reliability for the sealing of the pressure relief device.

[0059] Of course, in other examples, the first sealing ring 220 can also be integrally formed with the valve component 210, which is not limited here.

[0060] Reference Figure 3 and Figure 4 In some examples, the elastic return structure is a return spring, with one end of the return spring connected to the valve assembly 200 and the other end connected to the pressure relief valve body 100.

[0061] Using the above structure, the required pressure relief value can be precisely adjusted by adjusting the compression of the return spring. In this embodiment, the return spring is a cylindrical spring with a compact, simple, and reliable structure. It can be manufactured to the required size as needed. The spring stores elastic potential energy when compressed / stretched and has almost no energy loss when released (ideally), making it suitable for scenarios requiring frequent movements.

[0062] Of course, in other examples, the aforementioned return elastic element 300 can also be a butterfly spring, etc., which is not limited here.

[0063] Understandably, referring to Figures 2 to 4 In some embodiments of this utility model, the pressure relief valve body 100 includes a first valve body 110 and a second valve body 120. The first valve body 110 is provided with a pressure relief valve chamber 111 and a pressure relief inlet 112. The second valve body 120 is connected to the first valve body 110 and is provided with a pressure relief outlet 121. The end of the elastic return structure away from the valve assembly 200 is connected to the second valve body 120.

[0064] By dividing the pressure relief valve body 100 into two parts, the first valve body 110 and the second valve body 120, the split design can separate the complex structure into two parts, simplifying the processing technology of individual parts and improving processing accuracy and efficiency; there is no need to disassemble the entire valve, only the first valve body 110 and the second valve body 120 need to be separated for quick inspection or replacement of internal parts; the split valve body can be equipped with a sealing structure at the joint surface of the two parts, which is more reliable than the single seal of the integrated valve body; pressure, vibration and other loads can be distributed to the two parts, reducing fatigue cracking caused by local stress concentration.

[0065] For specific examples, refer to Figure 3 One end of the return spring is sleeved on the valve component 210, and the other end is sleeved on the second valve body 120. Of course, in other examples, the return spring can also be connected by abutment, snap-fit, etc.; it should also be noted that in other examples, one end of the return spring is connected to the valve component 210, and the other end is connected to the first valve body 110, which is not limited here.

[0066] For specific examples, refer to Figure 3 The centerlines of the pressure relief valve chamber 111, pressure relief inlet 112, and pressure relief outlet 121 coincide. This makes the pressure relief path more direct, reduces resistance during the pressure relief process, and improves pressure relief efficiency. Of course, in some other examples, at least two of the centerlines of the pressure relief valve chamber 111, pressure relief inlet 112, and pressure relief outlet 121 may have an angle between them, which is not limited here.

[0067] Reference Figure 3 In some examples, the second valve body 120 is at least partially constructed within the first valve body 110; wherein the second valve body 120 is movable relative to the first valve body 110.

[0068] With the above structure, the compression of the return spring of the return elastic element 300 is adjusted by moving the second valve body 120 relative to the first valve body 110 along the axial direction. The above design allows for quick adaptation to different pressure relief conditions without replacing parts, thus improving operational flexibility.

[0069] Of course, in some other examples, the second valve body 120 is fitted over the first valve body 110; it should also be noted that in some examples, the first valve body 110 and the second valve body 120 are relatively fixed, for example, they can be fixed together by snap-fit ​​connection, or by welding, etc.

[0070] Understandably, referring to Figure 3 and Figure 4 In some embodiments of this utility model, one of the first valve body 110 and the second valve body 120 is provided with an internal thread portion 113, and the other is provided with an external thread portion 122 that is threadedly connected to the internal thread portion 113.

[0071] Reference Figure 3 In some examples, the first valve body 110 has an internal thread 113 and the second valve body 120 has an external thread 122. Of course, in other examples, the second valve body 120 has an internal thread 113 and the first valve body 110 has an external thread 122, which is not limited here.

[0072] It should be noted that, in the specific example, a portion of the structure of the second valve body 120 is inserted into the first valve body 110. In other examples, the second valve body 120 may be completely inserted into the first valve body 110, which is not limited here.

[0073] With the above configuration, the second valve body 120 and the first valve body 110 are screwed in through the external thread 122 and the internal thread 113. At this time, the return elastic element 300, i.e., the return spring, is under pressure, which causes the valve assembly 200 to contact and block the pressure relief inlet 112. The deeper the second valve body 120 is screwed in, the greater the force acting on the valve assembly 200. The threaded connection does not require additional complex flange or clamp structures, occupies little space, is suitable for occasions with limited installation space, reduces the number of parts, and has good stability, flexibility and operability. It also plays an auxiliary or sealing role to a certain extent.

[0074] It should be noted that Hooke's Law, a physical law describing the relationship between spring deformation and external force, can be expressed by the formula F=kx, where F is the external force, k is the spring constant or stiffness, and x is the spring's compression or extension. This means that within the elastic limit, the spring's compressive force is directly proportional to its compression; that is, the more compressed it is, the greater the force required, and vice versa. Using the relationship between force and pressure, P=F / A, the amount of pressure required to open valve assembly 200 from the critical intrauterine pressure can be calculated, thereby adjusting the compression of the return spring.

[0075] In some examples, an adjustable pressure relief device activates when the intrauterine pressure exceeds the range of 52 mmHg to 60 mmHg, ensuring that the intrauterine pressure remains within a safe range at all times. Of course, the aforementioned pressure range can also be set to other values, which are not limited here.

[0076] Understandably, referring to Figure 3 In some embodiments of this utility model, the first valve body 110 is provided with a glue inlet 114, which is used to inject glue to form a sealing glue layer between the first valve body 110 and the second valve body 120.

[0077] After assembling and adjusting the valve assembly 200 with the first valve body 110 and the second valve body 120, adhesive is injected into the filling port 114 to form a sealing adhesive layer between the corresponding mating side wall areas of the first valve body 110 and the second valve body 120. This can be understood as forming a sealing adhesive layer between the internal thread portion 113 and the external thread portion 122 to achieve secondary sealing.

[0078] Of course, in some other examples, when the second valve body 120 is fitted over the first valve body 110, a glue-filling port 114 may be provided on the second valve body 120, which is not limited here.

[0079] By using the glue inlet 114, a sealing glue layer is formed between the first valve body 110 and the second valve body 120 to further improve the sealing performance and make the pressure relief device work more reliably.

[0080] It should be noted that, referring to Figure 2 and Figure 4 The outer wall of the first valve body 110 is provided with an indicator mark 115 for indicating the direction of pressure relief.

[0081] Understandably, referring to Figure 3 and Figure 4 In some embodiments of this utility model, the pressure relief valve body 100 further includes a second sealing ring 130; one of the first valve body 110 and the second valve body 120 is provided with a second positioning groove 123, and a portion of the structure of the second sealing ring 130 is located in the second positioning groove 123. The second sealing ring 130 is used to seal the mating gap between the first valve body 110 and the second valve body 120.

[0082] By providing a second sealing ring 130 and a second positioning groove 123, the gap between the first valve body 110 and the second valve body 120 after assembly is sealed, improving the singularity of the gas flow path of the pressure relief inlet 112, the pressure relief outlet 121 and the pressure relief valve chamber 111. The second positioning groove 123 provides an installation position for the second sealing ring 130, preventing axial movement of the second sealing ring 130. The structure is simple and the positioning is reliable, providing stability and reliability for the sealing of the pressure relief device.

[0083] Reference Figure 3In some examples, the second valve body 120 is provided with a second positioning groove 123, and a second sealing ring 130 is sleeved on the second valve body 120, with the outer ring of the second sealing ring 130 abutting against the inner wall of the pressure relief valve chamber 111 of the first valve body 110.

[0084] Of course, in some other examples, the inner wall of the pressure relief valve chamber 111 of the first valve body 110 may also be provided with a second positioning groove 123, the outer ring of the second sealing ring 130 is located in the second positioning groove 123, and the inner ring of the second sealing ring 130 abuts against the outer wall of the second valve body 120.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A device for relieving intrauterine pressure during endometrial ablation using thermal steam, characterized in that, include: The pressure relief valve body (100) is provided with a pressure relief valve chamber (111), a pressure relief inlet (112) and a pressure relief outlet (121), wherein the pressure relief inlet (112) and the pressure relief outlet (121) are both connected to the pressure relief valve chamber (111). A valve assembly (200) is movably disposed within the pressure relief valve chamber (111), the valve assembly (200) being movable relative to the pressure relief valve chamber (111) to switch between a sealed position and a pressure relief position; A return elastic element (300) is disposed between the valve assembly (200) and the pressure relief valve body (100), and the return elastic element (300) is used to drive the valve assembly (200) back to the sealing position; In the sealed position, the valve assembly (200) contacts the pressure relief inlet (112) to block the communication between the pressure relief inlet (112) and the pressure relief outlet (121); At the pressure relief position, the valve assembly (200) is separated from the pressure relief inlet (112) to connect the pressure relief inlet (112) and the pressure relief outlet (121).

2. The endometrial thermal steam ablation and uterine cavity pressure relief device according to claim 1, characterized in that, The valve assembly (200) includes: A valve component (210) is movably disposed in the pressure relief valve chamber (111) and is used to block the pressure relief inlet (112). The first sealing ring (220) is disposed on the valve component (210) and located at one end of the valve component (210) near the pressure relief inlet (112). The first sealing ring (220) is used to seal the fitting gap between the valve component (210) and the inner wall of the pressure relief valve cavity (111). The return elastic element (300) is connected to the valve element (210).

3. The endometrial thermal steam ablation and uterine cavity pressure relief device according to claim 2, characterized in that, The valve component (210) is provided with a first positioning groove (211), and the first sealing ring (220) is sleeved on the valve component (210), and part of the structure of the first sealing ring (220) is located in the first positioning groove (211).

4. The endometrial thermal steam ablation and intrauterine pressure relief device according to any one of claims 1 to 3, characterized in that, The return elastic element (300) is a return spring, one end of which is connected to the valve assembly (200) and the other end is connected to the pressure relief valve body (100).

5. The endometrial thermal steam ablation and uterine cavity pressure relief device according to any one of claims 1 to 3, characterized in that, The pressure relief valve body (100) includes: The first valve body (110) is provided with the pressure relief valve chamber (111) and the pressure relief inlet (112). The second valve body (120) is connected to the first valve body (110), and the second valve body (120) is provided with the pressure relief outlet (121). The end of the return elastic element (300) away from the valve assembly (200) is connected to the second valve body (120).

6. The endometrial thermal steam ablation and uterine cavity pressure relief device according to claim 5, characterized in that, The first valve body (110) and the second valve body (120) are nested together.

7. The endometrial thermal steam ablation intrauterine pressure relief device according to claim 6, characterized in that, One of the first valve body (110) and the second valve body (120) is provided with an internal thread (113), and the other is provided with an external thread (122) that is threaded to the internal thread (113).

8. The endometrial thermal steam ablation and uterine cavity pressure relief device according to claim 6, characterized in that, The first valve body (110) is provided with a glue inlet (114), which is used to inject glue to form a sealing glue layer between the first valve body (110) and the second valve body (120).

9. The endometrial thermal steam ablation and uterine cavity pressure relief device according to claim 5, characterized in that, The pressure relief valve body (100) also includes a second sealing ring (130); One of the first valve body (110) and the second valve body (120) is provided with a second positioning groove (123), and a portion of the structure of the second sealing ring (130) is located in the second positioning groove (123). The second sealing ring (130) is used to seal the mating gap between the first valve body (110) and the second valve body (120).

10. A steam ablation device, characterized in that, include: The steam melting handle (400) is provided with a first channel (410) and a second channel (420); A balloon (500) is disposed at one end of the steam ablation handle (400), and the first channel (410) and the second channel (420) are both connected to the balloon (500). A steam generating module (600) has its steam output end connected to one end of the first channel (410) away from the balloon (500). The endometrial thermal steam ablation intrauterine pressure relief device according to any one of claims 1 to 9, wherein the pressure relief inlet (112) is connected to one end of the second channel (420) away from the balloon (500).

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