Ear and nasal tract stent assembly

Abstract

The utility model discloses an ear and nasal cavity stent assembly which comprises a catheter, the catheter is provided with a first end and a second end, the catheter is provided with at least two balloons, the radial sizes of the at least two balloons are sequentially increased after the balloons are expanded, and the catheter is communicated with each balloon; the at least two balloons at least comprise a first balloon and a second balloon, the radial size of the expanded second balloon is larger than that of the expanded first balloon, and the first balloon is located on the side, facing the first end, of the second balloon.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and more specifically, to an ear and nose cavity support assembly. Background Art

[0002] The ear and nasal cavities of the human body are relatively narrow. When a disease occurs in the human body, the tissues in the ear and nasal cavities will extend into the cavities, which can easily cause blockage of the cavities.

[0003] In the related art, during the treatment of the ear and nasal cavities in the human body, medical devices cannot effectively reach the lesion location, cannot effectively expand the ear and nasal cavities, and cannot effectively solve the blockage problem of the ear and nasal cavities. Utility Model Content

[0004] One purpose of the utility model is to provide a new technical solution for an ear and nose cavity support assembly.

[0005] According to a first aspect of the utility model, an ear and nasal cavity support assembly is provided, the ear and nasal cavity support assembly comprising:

[0006] A catheter, the catheter having a first end and a second end, the catheter being provided with at least two balloons, the radial dimensions of the at least two balloons increasing sequentially after being expanded, the catheter being communicated with each of the balloons respectively;

[0007] The at least two balloons include at least a first balloon and a second balloon, the radial dimension of the second balloon after expansion is greater than the radial dimension of the first balloon after expansion, and the first balloon is located on a side of the second balloon facing the first end.

[0008] Optionally, the at least two balloons further include a third balloon, and the radial dimension of the third balloon after expansion is greater than the radial dimension of the second balloon after expansion.

[0009] Optionally, among the at least two balloons, a stent is sheathed on the outer side of the balloon having the largest radial dimension after expansion.

[0010] Optionally, a developing ring is provided between adjacent balloons, and the developing ring is sleeved on the catheter.

[0011] Optionally, the ear and nose cavity stent assembly further comprises an outer sheath tube, and the catheter is arranged in the tube of the outer sheath tube;

[0012] When the catheter is located inside the outer sheath, the at least two balloons are in a deflated state.

[0013] According to a second aspect of the present invention, a method for expanding an ear and nasal cavity is provided, which is used for the ear and nasal cavity stent assembly as described in the first aspect, and the method comprises:

[0014] Prepare an ear and nasal cavity stent assembly, wherein the ear and nasal cavity stent assembly has at least two balloons, wherein the radial dimensions of the at least two balloons after expansion increase sequentially, wherein the at least two balloons include at least a first balloon and a second balloon, wherein the radial dimension of the second balloon after expansion is greater than the radial dimension of the first balloon after expansion;

[0015] extending the catheter into the ear and nasal cavity so that the first balloon is located in the ear and nasal cavity;

[0016] A medium is introduced into the first balloon through the catheter to expand the first balloon, so as to perform a first dilation of the ear and nasal cavity;

[0017] Outputting the medium in the first balloon through the catheter to cause the first balloon to deflate;

[0018] Continue to extend the catheter into the ear and nose cavity to deliver the second balloon into the ear and nose cavity;

[0019] A medium is input into the second balloon through the catheter to expand the second balloon, so as to dilate the ear and nasal cavity for the second time.

[0020] Optionally, the at least two balloons further include a third balloon, and the radial dimension of the third balloon after expansion is greater than the radial dimension of the second balloon after expansion;

[0021] After the medium is input into the second balloon through the catheter to expand the second balloon to dilate the ear and nasal cavity for the second time, the method further includes:

[0022] Outputting the medium in the second balloon through the catheter to deflate the second balloon;

[0023] Continue to extend the catheter into the ear and nose cavity to deliver the third balloon into the ear and nose cavity;

[0024] A medium is input into the third balloon through the catheter to expand the third balloon, so as to perform a third dilation of the ear and nasal cavity.

[0025] Optionally, among the at least two balloons, a stent is sheathed on the outer side of the balloon with the largest radial dimension after expansion;

[0026] After the balloon having the largest radial dimension after expansion expands the ear and nasal cavity, the stent expands along with the balloon, so that the stent forms support for the ear and nasal cavity.

[0027] Optionally, before extending the catheter into the ear and nasal cavity so that the first balloon is located in the ear and nasal cavity, the method further includes:

[0028] The catheter is delivered to the otitis media via an outer sheath.

[0029] Optionally, the medium is introduced into the second balloon through the catheter to expand the second balloon to dilate the ear and nasal cavity for the second time. The process also includes:

[0030] Use the developing ring to observe whether the position of the second balloon dilation is aligned with the lesion position of the ear and nasal cavity;

[0031] When the expanded position of the second balloon is not aligned with the lesion position of the ear and nasal cavity, the second balloon is moved by the catheter to adjust the position of the second balloon to align with the lesion position.

[0032] According to one embodiment of the present disclosure, the ear and nasal cavity are expanded in sequence by using a first balloon and a second balloon of at least two balloons, so that the ear and nasal cavity are gradually expanded. The first expansion is performed with the first balloon, which is smaller in size than the second balloon, so that the balloon can more easily penetrate into the blocked ear and nasal cavity, and can effectively expand the ear and nasal cavity to effectively solve the blockage problem of the ear and nasal cavity.

[0033] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0035] Figure 1 It is one of the structural schematic diagrams of the ear and nose cavity support assembly in the embodiment of the present disclosure.

[0036] Figure 2 This is the second structural schematic diagram of the ear and nose cavity support assembly in the embodiment of the present disclosure.

[0037] Description of reference numerals:

[0038] 1. catheter; 11. first catheter; 110. first cavity; 12. second catheter; 120. second cavity; 13. third catheter; 21. first balloon; 22. second balloon; 3. stent; 4. developing ring; 5. main body; 51. first connecting tube; 52. second connecting tube; 6. outer sheath. DETAILED DESCRIPTION

[0039] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0040] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0041] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0042] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0043] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0044] According to one embodiment of the present disclosure, an ear and nose cavity support assembly is provided, such as Figure 1 , Figure 2 As shown, the ear and nose cavity support assembly includes:

[0045] A catheter 1, wherein the catheter 1 has a first end and a second end, and the catheter 1 is provided with at least two balloons, wherein the radial dimensions of the at least two balloons after expansion increase sequentially, and the catheter 1 is communicated with each of the balloons respectively;

[0046] The at least two balloons include at least a first balloon 21 and a second balloon 22 . The radial dimension of the second balloon 22 after expansion is greater than the radial dimension of the first balloon 21 after expansion. The first balloon 21 is located on the side of the second balloon 22 facing the first end.

[0047] In the embodiments of the present disclosure, during the process of expanding the blocked ear and nasal cavity by the ear and nasal cavity stent assembly, the ear and nasal cavity are expanded in turn by the first balloon 21 and the second balloon 22 of at least two balloons, so that the ear and nasal cavity are gradually expanded. The first expansion is performed with the first balloon 21 which is smaller in size than the second balloon 22, so that the balloon can more easily penetrate into the blocked ear and nasal cavity, and can effectively expand the ear and nasal cavity to effectively solve the blockage problem of the ear and nasal cavity.

[0048] The radial dimension of the second balloon 22 after expansion is greater than the radial dimension of the first balloon 21 after expansion, so that the second expansion can expand the ear and nasal cavity to a larger dimension than the first expansion. After the ear and nasal cavity is expanded by the first balloon 21, the second balloon 22 is inserted into the expanded ear and nasal cavity along with the catheter, thus avoiding the problem that the subsequent balloon cannot effectively enter the ear and nasal cavity for expansion due to the retraction of the ear and nasal cavity.

[0049] For example, in the embodiment of the present disclosure, the first end of the catheter 1 is used to extend into the human body, and the second end is used to connect with an external device to input a medium into the catheter 1 .

[0050] In the embodiment where the stent 3 is required to be provided, the stent 3 can be provided on the outside of the second balloon 22 so that the stent 3 and the second balloon 22 form a limit in the moving direction of the catheter 1. For example, the side wall of the stent 3 is a grid-like structure. When the grid-like structure is provided on the second balloon 22, the structure of the second balloon 22 can be embedded in the hollow of the grid-like structure to limit the stent 3.

[0051] For example, the expansion and contraction of the second balloon 22 is performed along the radial direction of the catheter 1 , so that the second balloon 22 can be embedded in the stent 3 or detached from the stent 3 .

[0052] Optionally, among the at least two balloons, the outer side of the balloon with the largest radial dimension after expansion is sheathed with a stent 3. In the embodiment where the at least two balloons include a first balloon 21 and a second balloon 22, the stent 3 is arranged on the outer side of the second balloon 22.

[0053] In one embodiment, the at least two balloons further include a third balloon, and the radial dimension of the third balloon after expansion is greater than the radial dimension of the second balloon 22 after expansion.

[0054] In an embodiment of the present disclosure, after the second balloon 22 dilates the ear and nasal cavity for the second time, the third balloon can dilate for the third time to further dilate the ear and nasal cavity.

[0055] In the embodiment where the stent 3 is provided, the stent 3 may also be provided outside the third balloon.

[0056] In one embodiment, Figure 1 , Figure 2 As shown, the adjacent balloon stents are provided with developing rings 4 , and the developing rings 4 are sleeved on the catheter 1 .

[0057] In the embodiment of the present disclosure, the developing ring 4 is used to display the ear and nasal cavity stent assembly and the position of the lesion. The position of the stent 3 and the lesion can be observed through the developing ring 4, and the position of the ear and nasal cavity expanded by the balloon can be determined more accurately.

[0058] For example, by observing the developing ring 4 , the stent 3 can be aligned with the lesion position, thereby improving the support accuracy of the stent 3 .

[0059] In one embodiment, the catheter 1 includes a first catheter 11 and a second catheter 12 , the second catheter 12 is sleeved on the first catheter 11 , the first balloon 21 is in communication with the first catheter 11 , and the second balloon 22 is in communication with the second catheter 12 .

[0060] In the embodiment of the present disclosure, the medium input and output of the first balloon 21 are controlled by the first catheter 11, and the medium input and output of the second balloon 22 are controlled by the second catheter 12. The separate control of the expansion and contraction of the first balloon 21 and the second balloon 22 can avoid interference between the first balloon 21 and the second balloon 22, thereby improving the operation accuracy of each step in the method.

[0061] In one embodiment, Figure 1 Figure 2 As shown, the ear and nose cavity support assembly further includes a main body 5, and the main body 5 is provided with a first connecting tube 51, a second connecting tube 52 and a third conduit 13;

[0062] The first conduit 11 is sleeved on the third conduit 13 , a first cavity 110 is defined between the first conduit 11 and the third conduit 13 , the first cavity 110 is communicated with the first connecting tube 51 , a second cavity 120 is defined between the second conduit 12 and the first conduit 11 , the second cavity 120 is communicated with the second connecting tube 52 .

[0063] In the embodiment of the present disclosure, the ear and nose cavity support assembly is connected to an external device through the main body 5. For example, it is connected to a medium delivery device through the first connecting tube 51 and the second connecting tube 52 to control the input and output of the medium in the first connecting tube 51 and the second connecting tube 52.

[0064] The gap between the first catheter 11 and the third catheter 13 forms a first cavity 110, and the first balloon 21 is connected to an external device through the first cavity 110 and the first connecting tube 51. The gap between the second catheter 12 and the first catheter 11 forms a second cavity 120, and the second balloon 22 is connected to an external device through the second cavity 120 and the second connecting tube 52.

[0065] One end of the third catheter 13 is located at the first end of the catheter 1, and the other end is connected to the outside through the body 5. A guide wire can be inserted into the third catheter 13 to form a moving guide structure of the catheter 1, and the catheter 1 moves along the guide wire.

[0066] In one embodiment, Figure 2 As shown, the ear and nose cavity stent assembly further includes an outer sheath tube 6, and the catheter 1 and the stent 3 are arranged in the outer sheath tube 6;

[0067] When the stent 3 and the catheter 1 are located inside the outer sheath 6 , the at least two balloons are in a contracted state.

[0068] The balloon is retracted into the outer sheath 6, which can reduce the space occupied by the balloon, thereby reducing the size of the ear and nose cavity stent assembly, thereby making it easier to enter the human body.

[0069] For example, the stent 3 is retracted outside the second balloon 22. The outer sheath 6 is an external structure of the ear and nose cavity stent assembly, and is used to accommodate the catheter 1 and the stent 3. The tubular structure of the outer sheath 6 is easier to deliver into the body.

[0070] After the outer sheath tube 6 is sent to the vicinity of the lesion, the tube opening of the outer sheath tube 6 is aligned with the ear and nasal cavity. By sending the catheter 1 out of the outer sheath tube 6, the first balloon 21 is extended into the ear and nasal cavity, and then the subsequent steps are performed in sequence, so that the stent 3 forms a support at the lesion position of the ear and nasal cavity, thereby ensuring the accuracy of drug administration and improving the treatment effect.

[0071] According to one embodiment of the present disclosure, a method for expanding an ear and nasal cavity is provided, which is used for the ear and nasal cavity stent assembly according to the embodiment of the present disclosure, and the method comprises:

[0072] Step 1100: preparing an ear and nasal cavity stent assembly, wherein the ear and nasal cavity stent assembly has at least two balloons, wherein the radial dimensions of the at least two balloons after expansion increase sequentially, wherein the at least two balloons at least include a first balloon 21 and a second balloon 22, wherein the radial dimension of the second balloon 22 after expansion is greater than the radial dimension of the first balloon 21 after expansion;

[0073] Step 1200: insert the catheter 1 into the ear and nasal cavity, so that the first balloon 21 is located in the ear and nasal cavity;

[0074] Step 1300: injecting a medium into the first balloon 21 through the catheter 1 to expand the first balloon 21 to dilate the ear and nasal cavity for the first time;

[0075] Step 1400: outputting the medium in the first balloon 21 through the catheter 1 to shrink the first balloon 21;

[0076] Step 1500: Continue to extend the catheter 1 into the ear and nose cavity to deliver the second balloon 22 into the ear and nose cavity;

[0077] Step 1600: A medium is introduced into the second balloon 22 through the catheter 1 to expand the second balloon 22, so as to dilate the ear and nasal cavity for the second time.

[0078] In the embodiment of the present disclosure, the ear and nasal cavity are expanded in sequence by the first balloon 21 and the second balloon 22 of at least two balloons, so that the ear and nasal cavity are gradually expanded. The first expansion is performed with the first balloon 21 which is smaller in size than the second balloon 22, so that the balloon can more easily penetrate into the blocked ear and nasal cavity, and can effectively expand the ear and nasal cavity to effectively solve the blockage problem of the ear and nasal cavity.

[0079] The radial dimension of the second balloon 22 after expansion is greater than the radial dimension of the first balloon 21 after expansion, so that the second expansion can expand the ear and nasal cavity to a larger dimension than the first expansion. After the ear and nasal cavity is expanded by the first balloon 21, the second balloon 22 is inserted into the expanded ear and nasal cavity along with the catheter, thus avoiding the problem that the subsequent balloon cannot effectively enter the ear and nasal cavity for expansion due to the retraction of the ear and nasal cavity.

[0080] In one embodiment, the at least two balloons further include a third balloon, and the radial dimension of the third balloon after expansion is greater than the radial dimension of the second balloon 22 after expansion;

[0081] After the medium is input into the second balloon 22 through the catheter to expand the second balloon 22 to dilate the ear and nasal cavity for the second time, the method further includes:

[0082] Outputting the medium in the second balloon 22 through the catheter to shrink the second balloon 22;

[0083] Continue to extend the catheter into the ear and nose cavity to deliver the third balloon into the ear and nose cavity;

[0084] A medium is input into the third balloon through the catheter to expand the third balloon, so as to perform a third dilation of the ear and nasal cavity.

[0085] In the embodiment of the present disclosure, after the second balloon 22 is expanded for the second time, the catheter 1 is continuously inserted so that the third balloon enters the ear and nasal cavity for the third expansion. The ear and nasal cavity are expanded multiple times by balloons of different radial sizes, and the multiple expansions are gradually increased in size, which can improve the expansion efficiency and reduce the size of the balloon that needs to be inserted into the blocked ear and nasal cavity during the first expansion when it is contracted, thereby making it easier to insert the balloon into the ear and nasal cavity.

[0086] Optionally, the number of balloons is set to at least two according to the number of times the ear and nasal cavities are expanded.

[0087] In one embodiment, among the at least two balloons, the outer side of the balloon with the largest radial dimension after expansion is provided with a stent 3;

[0088] After the balloon having the largest radial dimension after expansion expands the ear and nasal cavity, the stent expands along with the balloon, so that the stent 3 forms support for the ear and nasal cavity.

[0089] In the embodiment of the present disclosure, the ear and nasal cavity is expanded by the first balloon 21 so that the second balloon 22 can enter the ear and nasal cavity more easily.

[0090] For example, in an embodiment where the at least two balloons include a first balloon 21 and a second balloon 22, the stent 3 is sleeved on the outside of the second balloon 22. After the first balloon 21 is expanded for the first time, the stent 3 enters the lesion position of the ear and nasal cavity along with the second balloon 22, so that the stent 3 expands and supports the lesion position through the expansion of the second balloon 22. In this way, the stent 3 can accurately administer medicine to the lesion position in the ear and nasal cavity, thereby improving the treatment effect.

[0091] The location of the lesion often changes the original structure due to the lesion, making the cavity narrow and crowded, making it inconvenient to place a stent at the location of the lesion for treatment. The ear and nasal cavity expansion method disclosed in the present invention can expand the volume of the ear and nasal cavity to form a space in the ear and nasal cavity that is easier for the stent 3 to enter, so that the stent 3 can enter the ear and nasal cavity. After the stent 3 enters the ear and nasal cavity, the stent 3 is expanded so that it can accurately form a support at the location of the lesion.

[0092] Furthermore, in the disclosed method, a smaller balloon may be used for the first expansion, which is more convenient for reaching the blocked lesion.

[0093] For example, after the ear and nasal cavity is expanded by the first balloon 21, the first balloon 21 is contracted and the second balloon 22 drives the stent 3 into the expanded position of the ear and nasal cavity, so that the stent 3 can more easily enter the position of the lesion and form a support. The second balloon 22 enters the cavity after the first balloon 21 expands the cavity, which can avoid the problem that the second balloon 22 cannot enter the cavity due to the retraction of the ear and nasal cavity after the first balloon 21 expands the ear and nasal cavity and contracts.

[0094] For example, after the first balloon 21 expands the ear and nasal cavity, the catheter 1 is continued to be inserted so that the second balloon 22 enters the ear and nasal cavity as the first balloon 21 advances, thereby avoiding the problem of the second balloon 22 being unable to enter the ear and nasal cavity due to retraction of the ear and nasal cavity.

[0095] For example, the outer surface of the stent 3 is provided with drugs for treatment. The first balloon 21 is extended into the ear and nasal cavity for the first expansion, so that there is a larger space in the ear and nasal cavity to facilitate the entry of the stent 3. The catheter 1 drives the second balloon 22 and the stent 3 into the ear and nasal cavity, and the second balloon 22 is expanded to expand the second time to support the expansion of the stent 3. The expanded stent 3 supports the inner wall of the ear and nasal cavity, and the outer side of the stent 3 contacts the inner wall of the ear and nasal cavity, so that the drug on the outer surface of the stent 3 acts on the inner wall of the ear and nasal cavity. The supporting position of the stent 3 corresponds to the position of the lesion in the ear and nasal cavity, so that the drug can act on the lesion, which can form accurate drug administration for effective treatment.

[0096] For example, before the first balloon 21 is inserted into the ear and nasal cavity, the first balloon 21 is contracted outside the catheter 1 to reduce the volume at the first balloon 21, so that the first balloon 21 can be inserted into the ear and nasal cavity with the catheter 1 more easily for expansion. In the expansion method disclosed in the present invention, at least two balloons of increasing sizes are used for expansion, which can not only meet the size requirements of expansion by the largest balloon, but also make it easier to insert the balloon into the blocked ear and nasal cavity by the smaller size of the balloon for the first expansion.

[0097] Similarly, before the stent 3 enters the ear and nasal cavity along with the catheter 1 , the second balloon 22 is contracted outside the catheter 1 , and the stent 3 is contracted outside the second balloon 22 .

[0098] Optionally, the catheter 1 has a first end and a second end, and the first balloon 21 is located on a side of the second balloon 22 facing the first end. The side of the first balloon 21 facing the first end of the catheter 1 forms a tapered structure, which makes it easier for the first balloon 21 to extend into a smaller space of the ear and nose cavity.

[0099] In one embodiment, before the step 1200: inserting the catheter 1 into the ear and nasal cavity so that the first balloon 21 is located in the ear and nasal cavity, the step further includes:

[0100] Step 1110: Deliver the catheter 1 to the ear and nose cavity through the outer sheath 6.

[0101] In the embodiment of the present disclosure, the outer sheath 6 is extended into the human body to deliver the ear and nasal cavity stent assembly into the human body and to the vicinity of the location of the lesion, and the catheter 1 is extended into the human body along with the outer sheath 6. For example, the ear and nasal cavity stent assembly is extended to the mouth of the cavity where the lesion is located, that is, to the cavity mouth of the ear and nasal cavity. The catheter 1 drives the first balloon 21 to extend out of the outer sheath 6 and enter the ear and nasal cavity, and the medium is input through the catheter 1 to expand the first balloon 21 to support the ear and nasal cavity for the first expansion. Then, the first balloon 21 is contracted and the second balloon 22 is driven by the catheter 1 to move into the expanded ear and nasal cavity for the second expansion.

[0102] For example, the stent 3 moves with the second balloon 22. The stent 3 is expanded in the second expansion of the ear and nasal cavity by expanding the second balloon 22 to form a support in the ear and nasal cavity.

[0103] In one embodiment, the inputting of the medium into the first balloon 21 through the catheter 1 comprises:

[0104] Step 1310 : Input a medium into the first balloon 21 through the first catheter 11 .

[0105] The inputting of the medium into the second balloon 22 through the catheter 1 comprises:

[0106] Step 1510 : Input a medium into the second balloon 22 through the second catheter 12 .

[0107] In the embodiment of the present disclosure, the medium input and output of the first balloon 21 are performed through the first catheter 11, and the medium input and output of the second balloon 22 are performed through the second catheter 12. The separate control of the expansion and contraction of the first balloon 21 and the second balloon 22 can avoid interference between the first balloon 21 and the second balloon 22, thereby improving the operation accuracy of each step in the method.

[0108] In one embodiment, the process of inputting a medium into the second balloon 22 through the catheter 1 to expand the second balloon 22 to perform a second dilation of the ear and nasal cavity further includes:

[0109] Step 1610: Observe through the developing ring 4 whether the expanded position of the second balloon 22 is aligned with the lesion position of the ear and nose cavity;

[0110] Step 1620: When the expanded position of the second balloon 22 is not aligned with the lesion position of the ear and nasal cavity, the second balloon 22 is moved by the catheter 1 to align the position of the second balloon 22 with the lesion position.

[0111] In the embodiment of the present disclosure, the structure in the ear and nose cavity is complex, and when the blocked lesion is expanded, the position of the lesion and the balloon are easily deviated. The position of the support 3 and the lesion can be observed through the developing ring 4, so that the position of the ear and nose cavity expanded by the balloon can be determined more accurately.

[0112] For example, the stent 3 expands with the second balloon 22, and the positions of the stent 3 and the lesion can be observed through the developing ring 4. During the process of expanding the stent 3, the position of the stent 3 can be adjusted by driving the stent 3 to move through the catheter 1, so as to drive the stent 3 to align with the position of the lesion. In this way, the position of the lesion can be accurately supported after the stent 3 expands to form support.

[0113] In one embodiment, after the medium is input into the second balloon 22 through the catheter 1 to expand the second balloon 22 to dilate the ear and nasal cavity for the second time, the method further includes:

[0114] Step 1710: outputting the medium in the second balloon 22 through the catheter 1 to shrink the second balloon 22;

[0115] Step 1720: putting the catheter 1 into the outer sheath 6;

[0116] Step 1730: Remove the outer sheath 6.

[0117] In the embodiment of the present disclosure, after the second balloon 22 expands the ear and nasal cavity for the second time, the ear and nasal cavity stent assembly needs to be withdrawn. After the medium in the second balloon 22 is discharged, the second balloon 22 shrinks and separates from the inner wall of the ear and nasal cavity. Then the second balloon 22 and the first balloon 21 are driven into the outer sheath 6 through the catheter 1. Finally, the outer sheath 6 is removed.

[0118] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0119] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. An ear and nose cavity stent assembly, characterized in that: The ear and nose cavity support assembly comprises: A catheter, the catheter having a first end and a second end, the catheter being provided with at least two balloons, the radial dimensions of the at least two balloons increasing sequentially after being expanded, the catheter being communicated with each of the balloons respectively; The at least two balloons include at least a first balloon and a second balloon, the radial dimension of the second balloon after expansion is greater than the radial dimension of the first balloon after expansion, and the first balloon is located on a side of the second balloon facing the first end.

2. The ear and nose cavity stent assembly according to claim 1, characterized in that: The at least two balloons further include a third balloon, and a radial dimension of the third balloon after expansion is greater than a radial dimension of the second balloon after expansion.

3. The ear and nose cavity stent assembly according to claim 1, characterized in that: Among the at least two balloons, the outer side of the balloon with the largest radial dimension after expansion is covered with a stent.

4. The ear and nose cavity stent assembly according to claim 1, characterized in that: A developing ring is arranged between adjacent balloons, and the developing ring is sleeved on the catheter.

5. The ear and nose cavity stent assembly according to claim 1, characterized in that: The ear and nose cavity stent assembly also includes an outer sheath tube, and the catheter is arranged in the tube of the outer sheath tube; When the catheter is located inside the outer sheath, the at least two balloons are in a deflated state.

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