Nasal memory stent and deformable nasal support system

Abstract

The present disclosure relates to a nasal cavity memory stent and a deformable nasal cavity support system, the stent body is formed by a shape memory wire having a first shape and a second shape at different temperatures, in the second shape, the shape memory wire is in a spiral structure to be used for nasal cavity packing and support to improve nasal ventilation by a spring-like structure. When needed, the stent body is only needed to be inserted into the nasal cavity, and the inserted stent body can be gradually deformed to fit the inner wall of the nasal cavity to support the nasal cavity by the temperature of the nasal cavity. When disassembled, the stent outer end is only needed to be cooled, and the initial shape can be gradually recovered from the outer end to be removed from the nasal cavity. The deformable nasal cavity support system can be used for postoperative nasal cavity packing of nasal septum correction surgery, nasal endoscopy and the like, and can also be used for improving hypoxia caused by adenoid hypertrophy blocking the posterior naris and improving the obstruction of the oropharynx of patients with obstructive sleep apnea hypopnea, smooth breathing and sleep aid.

Description

Technical Field

[0001] This disclosure relates to the field of medical devices, specifically to a nasal cavity memory stent and a deformable nasal cavity support system. Background Technology

[0002] Chronic rhinosinusitis, deviated nasal septum, adenoid hypertrophy, or obstructive sleep apnea-hypopnea syndrome are common otolaryngological diseases that severely affect patients' ventilation function, causing long-term chronic hypoxia and leaving them in a sub-healthy state. Endoscopic nasal surgery is currently one of the main treatment methods. Postoperative packing is an essential step to prevent complications such as septal hematoma, re-deviation, and nasal adhesions. Nasal packing requires filling the nasal cavity with a filling material (such as an expandable sponge) to compress and stop bleeding. This filling material usually fills both nasal cavities, preventing the nasal cavity from breathing, thus causing a series of symptoms such as headache, nasal swelling and pain, nasal congestion, nasal itching, tearing, and difficulty swallowing. Although surgery is becoming increasingly minimally invasive, postoperative packing remains a painful experience for patients and is a major challenge in clinical practice.

[0003] Chinese patent application number 202111125564.4 discloses a mesh nasal cavity support, which is currently the latest treatment method after septoplasty. However, in actual application, when installing the nasal cavity support, it is first necessary to use a matching installation tool to make the nasal cavity support retract radially before it can be inserted into the nasal cavity. The operation is cumbersome and requires the use of installation tools. Summary of the Invention

[0004] The purpose of this disclosure is to provide a nasal cavity memory support and a deformable nasal cavity support system to at least partially solve the problems existing in the related art.

[0005] To achieve the above objectives, this disclosure provides a nasal cavity memory support, including a support body formed of shape memory material. The support body is configured to have a first shape at a first temperature outside the nasal cavity and a second shape at a second temperature after being implanted into the nasal cavity. The support body is formed from a shape memory filament, which, in the second shape memory shape, has a spiral structure to at least support the nasal cavity and establish an airway.

[0006] Optionally, in the second configuration, the support body includes a first spiral segment, a second spiral segment, and a third spiral segment arranged sequentially from front to back. The first spiral segment is used to support the nasal vestibule and is configured to expand radially outward. The second spiral segment is used to support the nasal septum mucosa and is configured to expand radially outward. The third spiral segment is used to support the nasal meatus, specifically the common nasal meatus at the lower edge of the middle turbinate, and is configured to expand radially outward.

[0007] Optionally, the pitch of the helical structure is 1.5mm-2.5mm, the first helical segment is spindle-shaped with an axial length of 9mm-11mm, a maximum height of 6mm-10mm, and a maximum width of 6mm-10mm, the second helical segment is spindle-shaped with an axial length of 14mm-15mm, a maximum height of 15mm-20mm, and a maximum width of 2mm-4mm, and the third helical segment is elliptical cylindrical with an axial length greater than 25mm, and the elliptical cross-section has a major diameter of 10mm along the height direction and a minor diameter of 2mm-4mm along the horizontal direction.

[0008] Optionally, the third spiral segment extends generally in a straight line along the front-back direction with an axial length of 25-30 mm; or the third spiral segment includes a first straight segment and a first oblique segment extending backward and downward from the first straight segment, with an axial length of 25 mm-45 mm, so that the first oblique segment extends to the oropharynx, specifically the oropharynx between the soft palate and the posterior pharyngeal wall, to improve the narrowing of the soft palate plane; or the third spiral segment includes a second straight segment and a second oblique segment extending backward and upward from the second straight segment, with an axial length of 25 mm-45 mm, so that the second oblique segment extends to the adenoids and supports the adenoids, to improve nasal obstruction caused by adenoid hypertrophy.

[0009] Optionally, the first temperature is 0-10 degrees Celsius, the first shape is a linear shape, which can be used for storage and is convenient for implantation and removal, and the second temperature is 36-37 degrees Celsius.

[0010] Optionally, the shape memory material is a shape memory alloy or a shape memory polymer.

[0011] Optionally, the end of the shape memory wire is provided with a protective cap.

[0012] Optionally, the outer end of the stent body is connected to an adhesive piece for attaching it to the face or nose after the stent body is implanted into the nasal cavity.

[0013] Optionally, the adhesive component is provided with a heat-conducting component that wraps around the outer end of the support body.

[0014] According to a second aspect of this disclosure, a deformable nasal support system is provided, including the aforementioned nasal memory support and a temperature control device having an interface for detachably connecting to the outer end of the support body.

[0015] The above technical solution pre-configures the support body into a first form that facilitates storage and transportation when it reaches a first temperature outside the nasal cavity. When needed for patient use, the support body in its first form is simply inserted into the patient's nasal cavity. Because the nasal cavity temperature reaches a second temperature, the shape-memory filamentous support body automatically and gradually deforms into a second form—a spring-like spiral structure—to support the nasal cavity. Once implanted and deformed, it establishes a nasal airflow path, improving nasal congestion. Conversely, the same process occurs. When removing the support from the nasal cavity, simply cooling the outer end of the nasal memory support allows it to gradually return to its initial shape and be removed from the nasal cavity. This design is simple to install without the need for additional tools, representing a novel deformable nasal support solution. It can be used for post-nasal surgery nasal packing and is expected to become a new conservative treatment alternative to surgery for patients with nasal congestion, adenoid hypertrophy, or obstructive sleep apnea-hypopnea syndrome.

[0016] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of a nasal cavity memory stent according to a first embodiment of the present disclosure;

[0019] Figure 2 This is a schematic diagram of a nasal cavity memory stent according to a second embodiment of the present disclosure;

[0020] Figure 3 This is a schematic diagram of a nasal cavity memory stent according to a third embodiment of the present disclosure;

[0021] Figure 4 This is a front view of a nasal cavity memory support according to a first embodiment of the present disclosure;

[0022] Figure 5 This is a side view of a nasal cavity memory support according to a first embodiment of the present disclosure;

[0023] Figure 6 yes Figure 4 Cross-sectional view along the AA direction;

[0024] Figure 7 yes Figure 4 Cross-sectional view along the BB direction;

[0025] Figure 8yes Figure 4 Cross-sectional view along the CC direction.

[0026] Explanation of reference numerals in the attached figures

[0027] 1-Support body; 10-First spiral segment; 20-Second spiral segment; 30-Third spiral segment; 31-First straight segment; 32-First oblique segment; 33-Second straight segment; 34-Second oblique segment; 40-Protective cap; 50-Adhesive component; 60-Heat-conducting component. Detailed Implementation

[0028] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0029] In this disclosure, unless otherwise stated, the directional terms "up" and "down" are used based on the directions defined in the accompanying drawings, specifically as follows: Figure 5 The diagram shows the orientation. "Inner" and "outer" should be defined based on the inner and outer aspects of the nasal cavity during use, and in some cases, may also refer to the contour of the component itself. For example: "The third spiral segment is configured to expand "outward" along an elliptical cylinder" refers to outward expansion along its own contour; "The outer end of the support body is connected to the adhesive" refers to the end of the support body located outside the nasal cavity; "from front to back" refers to the direction from outside the nasal cavity to inside the nasal cavity after the support body is inserted into the nasal cavity; "The first straight segment extends "downward and backward" means that the extension direction of the first straight segment is deeper into the nasal cavity and obliquely downward (oropharynx).

[0030] In addition, the terms "first," "second," etc., used in this disclosure are for distinguishing one element from another and do not have sequential or importance. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0031] According to the specific embodiments of this disclosure, refer to Figures 1-3 A nasal cavity memory support is provided, comprising a support body 1 formed of shape memory material. The support body 1 is configured to have a first shape at a first temperature outside the nasal cavity and a second shape at a second temperature after implantation into the nasal cavity. The second shape can be used to support the nasal cavity and establish an airway. In embodiments of this disclosure, the first and second shapes of the support body 1 are pre-designed according to user needs. During use, it only needs to be placed at the corresponding temperature to automatically deform into the required first and second shapes.

[0032] In this disclosure, as shown in the figure, the main body 1 of the stent can be cleverly formed from a shape memory filament. In a second configuration, the shape memory filament can form a spiral structure under a second temperature to at least support the nasal cavity and establish an airway. This clever use of a single filament allows for the deformation of the spiral structure. Combined with the two-way memory effect of the shape memory material, this enables the implantation and removal of the nasal memory stent. The spiral structure also possesses good elastic support, sufficient to support the nasal cavity. The central channel formed by the spiral shape memory filament establishes an airway for the patient, and this spiral structure has a certain degree of elasticity to deform elastically when the nasal cavity is subjected to pressure, preventing damage to the nasal cavity. Furthermore, this allows the nasal memory stent to be adapted to different nasal cavity dimensions, thereby improving its applicability.

[0033] Furthermore, the pre-configured first form of the stent body 1, at a first temperature outside the nasal cavity, facilitates storage and transportation. When needed for patient use, the stent body 1 in its first form is simply inserted into the patient's nasal cavity. Since the nasal cavity temperature reaches a second temperature, the shape-memory filament stent body, as it gradually extends into the nasal cavity, automatically and gradually deforms to a second form that supports the nasal cavity. After implantation and deformation, it establishes a nasal airway. Conversely, when removing it from the nasal cavity, only the outer end of the nasal memory stent needs to be cooled, allowing it to gradually return to its initial shape from the outer end and be removed from the nasal cavity. This design is simple to install and requires no additional tools, representing a novel nasal memory stent solution.

[0034] In this disclosure, various embodiments are summarized, and the shape memory material can be selected as a shape memory alloy or a shape memory polymer, depending on the requirements. Both are mature shape memory technologies and can be processed and manufactured according to actual needs. This disclosure does not limit the selection of either.

[0035] Shape memory alloys (SMAs) are alloy materials that, when heated, completely eliminate the deformation that occurred at lower temperatures and restore their original shape before deformation—essentially, alloys with a "memory" effect. The deformation recovery capability of shape memory alloys is due to the thermoelastic martensitic phase transformation that occurs within the material during deformation. Shape memory alloys contain two phases: austenitic phase at high temperatures and martensitic phase at low temperatures. Depending on different thermodynamic load conditions, shape memory alloys exhibit two different properties. Since the inherent properties, working principles, and manufacturing and processing of spring-shaped shape memory alloys are well-known to those skilled in the art, mature manufacturing processes exist both theoretically and commercially. Examples include common temperature-controlled springs, temperature-sensing springs, and shape memory springs. Those skilled in the art can routinely select the type, formulation, and processing method of shape memory alloy based on actual needs. For example, by determining the appropriate heat treatment temperature and pre-forming process for a specific formulation, conventional experiments can be conducted to achieve different forms of the shape memory material at different required temperatures. This will not be discussed in detail here. For example, in this disclosure, a relatively mature nickel-titanium alloy material can be used, which also has high biocompatibility and is suitable for implantation in the nasal cavity.

[0036] Furthermore, shape memory polymers are also commonly used shape memory materials in this field. Compared to shape memory alloys, they can withstand lower temperatures. Generally, a pre-shaped polymer material (cross-linked or with a multiphase structure) is added to a certain temperature and an external force is applied to deform it into the desired shape. The stress is then frozen during cooling in the deformed state. When a certain temperature is reached, the stress in the material is released, thus automatically restoring its original shape. The principle is well-known in the art and will not be elaborated upon here. In this embodiment, thermoplastics such as cross-linked PE, cross-linked EVA, and PVC can be selected, and this disclosure does not limit this. In other embodiments, any material with shape memory properties known in the art can be used, and this disclosure does not limit this.

[0037] In addition, in order to enable the main body 1 of the stent to be in the first form when it is in the ambient temperature outside the nasal cavity for easy storage and transportation, and to be in the second form after entering the nasal cavity for supporting the nasal cavity, in the embodiments of this disclosure, the first temperature can be 0-10 degrees Celsius, the first form can be a linear form for storage and easy implantation and removal, and the second temperature is 36-37 degrees Celsius.

[0038] It should be emphasized that this disclosure does not specifically limit the first temperature and the second temperature. The above is only an exemplary embodiment. In other embodiments, the first temperature can be 0 degrees Celsius and the second temperature can be 36 degrees Celsius. That is, at 0 degrees Celsius, the support body 1 can be linear, while at 36 degrees Celsius it is completely deformed into a spiral structure of the second form. In order to prevent the influence of temperature fluctuations in the storage environment on the support body 1, depending on the selection of the first temperature, the storage box for storing the support body 1 can have temperature control capabilities, so that its interior is always kept at the first temperature, such as 0 degrees Celsius, to avoid unnecessary deformation and fluctuation of the nasal memory support.

[0039] In practical use, depending on the nasal disease to be treated or the auxiliary role it plays, the main body of the second-form support can have various structures. (See reference...) Figures 1-3 To improve treatment efficacy, in some embodiments, the support body 1 can be designed in a second form. The support body 1 may include a first helical segment 10, a second helical segment 20, and a third helical segment 30 arranged sequentially from front to back. The first helical segment 10 is used for support in the nasal vestibule, configured to expand radially outward to provide uniform support to the nasal vestibule. The second helical segment 20 is used for support on the nasal septum mucosa, configured to expand radially outward to provide uniform pressure to the nasal septum mucosa. The third helical segment 30 is used for support at least in the nasal passage, specifically the common nasal passage below the lower edge of the middle turbinate, configured to expand radially outward to adapt to the structure of the nasal passage and provide uniform support. Here, in some embodiments, the third helical segment 30 may only support in the nasal passage. Furthermore, in other embodiments, in addition to supporting the nasal passage, the third helical segment 30 can also support the oropharynx or adenoids (described below) by adjusting its length and angle, thus providing support for the entire nasal cavity and demonstrating strong practicality. The first helical segment 10, the second helical segment 20, and the third helical segment 30 are formed from the same shape memory filament.

[0040] Furthermore, referring to Figures 4-5 (in Figure 4 The direction of the middle arrow X is the length direction. Figure 5 The direction of the arrow Y in the image is the width. Figure 5 (The direction of the middle arrow Z indicates the height). In the embodiments of this disclosure, to accommodate the nasal cavity structure of most patients, the pitch of the spiral structure can be 1.5mm-2.5mm when designing the second morphology, thereby providing better support. Additionally, referring to... Figure 6 The first helical segment 10 can have a spindle-shaped structure, with an axial length of 9mm-11mm, a maximum height of 6mm-10mm, and a maximum width of 6mm-10mm, as shown in the reference. Figure 7The second helical segment 20 can have a spindle-shaped structure, with an axial length of 14mm-15mm, a maximum height of 15mm-20mm, and a maximum width of 2mm-4mm, as shown in the reference. Figure 8 The third helical segment 30 can be an elliptical cylinder with an axial length greater than 25mm. The major diameter of the elliptical cross-section along the height direction is 10mm, and the minor diameter along the horizontal direction is 2mm-4mm. It should be noted that, to avoid interference, Figures 6-8 Only the cross-sectional profile corresponding to its own segment is displayed.

[0041] As described above, in order to meet the diverse needs of patients, in some embodiments, the third helical segment 30, in addition to supporting the nasal passage, can also be designed with different lengths and angles to simultaneously support the oropharynx or adenoids. The following details these specific cases:

[0042] Reference Figure 1 and Figure 4 In some embodiments, the third helical segment 30 can extend in a roughly straight line along the front-back direction with an axial length of 25-30 mm. In this case, the third helical segment 30 is used entirely to support the nasal passage. In addition, it should be noted that due to the different nasal cavity structures of patients, the third helical segment 30 may be slightly deformed, so it may not be absolutely straight.

[0043] Reference Figure 2 In some other embodiments, the third helical segment 30 may include a first straight segment 31 and a first oblique segment 32 extending rearward and downward from the first straight segment 31. The axial length of the third helical segment 30 may be 25mm-45mm, such that the first oblique segment 32 extends to the oropharynx to support the oropharynx, specifically the oropharynx between the soft palate and the posterior pharyngeal wall, to improve the narrowing of the soft palate plane. In this embodiment, the first straight segment 31 of the third helical segment 30 is used to support the nasal passage, and the first oblique segment 32 of the third helical segment 30 is used to support the oropharynx.

[0044] Reference Figure 3 In some other embodiments, the third helical segment 30 may further include a second straight segment 33 and a second oblique segment 34 extending rearward and upward from the second straight segment 33. The axial length of the third helical segment 30 is 25mm-45mm, such that the second oblique segment 34 extends to the adenoids to support the adenoids, thereby improving obstruction of the posterior nasal cavity and nasopharynx caused by adenoid hypertrophy. In this embodiment, the second straight segment 33 of the third helical segment 30 is used to support the nasal passage, and the second oblique segment 34 of the third helical segment 30 is used to support the adenoids.

[0045] It should be noted that the angle between the oblique line segment and the straight line segment can be designed to be between 120 degrees and 160 degrees, and the length of the oblique line segment in the direction of the straight line segment is 10 mm.

[0046] Reference Figure 1 To prevent the shape memory wire from scratching the nasal cavity when it enters, in some embodiments, a protective cap 40 may be provided at the end of the shape memory wire. Here, in this embodiment, the protective cap 40 may be configured as a soft cap that covers the end of the shape memory wire. In addition, in other embodiments, the protective element 40 may be a metal ball or polymer ball integrally formed with the shape memory wire, and its outer surface may be configured to be smooth to prevent scratching the nasal cavity.

[0047] To ensure that the main body 1 of the support can be fixed after being inserted into the nasal cavity and can be easily removed, refer to... Figure 1 In some embodiments, the outer end of the stent body 1 may be connected to an adhesive piece 50 for attaching to the face or nose after the stent body 1 is implanted into the nasal cavity, thereby further ensuring the stability of the implanted stent body 1 and preventing interference from other objects. Additionally, the adhesive piece 50 is fixed outside the nasal cavity, thus preventing the stent body 1 from excessively entering the nasal cavity. Furthermore, when it is necessary to remove the stent body 1 from the nasal cavity, the stent body 1 can be pulled outwards using the adhesive piece 50 extending from the nostril.

[0048] Furthermore, to facilitate the removal of the support body 1 from the nasal cavity, in some embodiments, the adhesive 50 is provided with a heat-conducting element 60 that wraps around the outer end of the support body 1. Here, the heat-conducting element 60 can be a heat-conducting cap structure, used to connect to the temperature control device mentioned below. The temperature control device is used to cool the heat-conducting element 60 when the support body 1 needs to be removed, so that the shape memory wire temperature is restored to a first temperature through the heat-conducting element 60. At this time, the support body 1 deforms back to the first shape, making it easy to remove. Of course, at this time, the shape memory wire is required to have a two-way memory effect, that is, the shape memory wire restores the high-temperature phase shape when heated and restores the low-temperature phase shape when cooled. In this embodiment, the adhesive 50 can be similar to a band-aid structure, fixed in the middle to the outer peripheral wall of the heat-conducting element 60, and having adhesive layers and release paper at both ends, so as to facilitate fixing between the nose and the upper lip.

[0049] According to a second aspect of this disclosure, a deformable nasal support system is provided, including the aforementioned nasal memory support and a temperature control device. The temperature control device has an interface for detachably connecting to the outer end of the support body 1. Here, the temperature control device can be any device capable of temperature regulation, such as a thermoelectric cooler, and is mainly used to adjust the temperature of the support body 1, for example, cooling it to a first temperature. This facilitates the gradual restoration of the support body 1's shape from the outer end, allowing the entire support body to be gradually removed. Furthermore, if the nasal support prematurely deforms to a second shape due to inexperience and cannot be implanted properly, the temperature can be changed to reverse the deformation of the nasal support before implantation, i.e., temporary temperature control is provided as needed. This system possesses all the beneficial effects of the aforementioned nasal memory support, which will not be elaborated further here.

[0050] To facilitate understanding of the technical solution, the following will be combined with... Figure 1 The embodiment illustrates the entire installation and removal process of the nasal memory stent: First, in its first form, it is in a straight line. During installation, it needs to be gradually inserted into the patient's nasal cavity. At this time, the portion of the shape memory wire that first enters the nasal cavity begins to heat up and deform. After the innermost stent (i.e., the third spiral segment) is implanted in place (i.e., fully inserted into the nasal passage), deformation is complete. Other parts are similar, gradually heating up during the insertion process. The implantation speed can be reasonably controlled to ensure that each part is implanted in place before deformation is complete. This speed can be tested according to routine experiments, and patients or doctors should be reminded to perform compliant operations. When removal is required, since a temperature control device is connected to the outer end of the stent body 1, the cooling process is controlled so that the end of the shape memory wire closest to the outside of the body begins to cool down first. Thus, the stent body 1 also deforms from the end closest to the outside of the body, gradually returning to a straight line. Then, by appropriately guiding the adhesive piece 50 outward, the deformed stent portion can be pulled out of the nasal cavity until the entire stent is removed from the nasal cavity.

[0051] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0052] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0053] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A nasal cavity memory support, characterized in that, The device includes a support body (1) formed of shape memory material, the support body (1) being configured to have a first shape at a first temperature outside the nasal cavity, the first shape being a linear shape, and a second shape at a second temperature after implantation into the nasal cavity, the support body (1) being formed of a shape memory filament, the shape memory filament having a helical structure in the second shape to at least support the nasal cavity and establish an airway. In the second configuration, the support body (1) includes a first spiral segment (10), a second spiral segment (20) and a third spiral segment (30) arranged sequentially from front to back. The first helical segment (10) is used for support in the nasal vestibule and is configured as a spindle-shaped structure that expands radially outward. The second helical segment (20) is used for support on the nasal septum mucosa and is configured as a radially outwardly expanding spindle-shaped structure. The third helical segment (30) is used for support in the nasal passage and is configured as an elliptical cylindrical structure that expands radially outward. The outer end of the support body (1) is connected to an adhesive (50) for attaching to the face or nose after the support body (1) is implanted into the nasal cavity. The adhesive (50) contains a heat-conducting element (60) that wraps around the outer end of the support body (1).

2. The nasal cavity memory stent according to claim 1, characterized in that, The pitch of the spiral structure is 1.5mm-2.5mm. The first helical segment (10) has an axial length of 9mm-11mm, a maximum height of 6mm-10mm, and a maximum width of 6mm-10mm. The second helical segment (20) has an axial length of 14mm-15mm, a maximum height of 15mm-20mm, and a maximum width of 2mm-4mm. The axial length of the third spiral segment (30) is greater than 25 mm, and the elliptical cross section has a major diameter of 10 mm along the height direction and a minor diameter of 2 mm-4 mm along the horizontal direction.

3. The nasal cavity memory stent according to claim 2, characterized in that, The third helical segment (30) extends approximately in a straight line along the front-to-back direction, with an axial length of 25-30 mm, or The third spiral segment (30) includes a first straight segment (31) and a first oblique segment (32) extending rearward and downward from the first straight segment (31). The axial length of the third spiral segment (30) is 25mm-45mm, such that the first oblique segment (32) extends to the oropharynx; or The third spiral segment (30) includes a second straight segment (33) and a second oblique segment (34) extending backward and upward from the second straight segment (33). The axial length of the third spiral segment (30) is 25mm-45mm, such that the second oblique segment (34) extends to the adenoids to support the adenoids.

4. The nasal cavity memory stent according to claim 1, characterized in that, The first temperature is 0-10 degrees Celsius, and the second temperature is 36-37 degrees Celsius.

5. The nasal cavity memory stent according to claim 1 or 4, characterized in that, The shape memory material is a shape memory alloy or a shape memory polymer.

6. The nasal cavity memory stent according to claim 1, characterized in that, The end of the shape memory wire is provided with a protective cap (40).

7. A deformable nasal cavity support system, characterized in that, The nasal cavity memory stent according to any one of claims 1-6, and a temperature control having an interface for detachably connecting to the outer end of the stent body (1).

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