A nasal protection sleeve for a transnasal endoscopic surgical corridor and a delivery device therefor

Abstract

The application discloses a nasal cavity protection sleeve for a nasal endoscopic surgery channel and a conveying device thereof, belongs to the technical field of nasal cavity protection devices, and is characterized in that the nasal cavity protection sleeve is internally provided with a through hole, the nasal cavity protection sleeve comprises a leading-in portion, a limiting portion and an extending portion which are sequentially connected, the leading-in portion is in a whole trumpet shape, the leading-in portion is provided with a thrust ring at one end away from the limiting portion, the limiting portion is located at the joint of the leading-in portion and the extending portion and has the minimum cross section, the top of the extending portion is horizontally axially, and the bottom of the extending portion is downwardly inclined axially; and the conveying device comprises a conveyor I or a conveyor II. The nasal cavity protection sleeve has strong supporting force, is convenient to convey and effectively improves the stability of the nasal cavity protection sleeve after being input into the nasal cavity.

Description

Technical Field

[0001] This invention relates to the technical field of nasal cavity protection devices, and more particularly to a nasal cavity protection sleeve and its delivery device for a transnasal endoscopic surgical channel. Background Technology

[0002] The transnasal approach utilizes the natural spaces of the nasal cavity, sinuses, and nasopharynx to fully expose and maximize the removal of diseased tissue. Due to its advantages such as short path, wide field of vision, clear imaging, minimal trauma, rapid postoperative recovery, and lower cost, it has become an inevitable trend in sinus endoscopic and transnasal skull base endoscopic surgery.

[0003] Currently, transnasal surgery essentially uses the nasal cavity as a passageway for surgical instruments. This inevitably leads to injury and bleeding to the nasal mucosa, turbinates, nasal septum, sphenoid bone, frontal sinus, and maxillary sinus during the procedure. Such trauma significantly increases the risk of infection after nasal surgery and hinders patient recovery. Therefore, a protective device is needed to reduce these risks associated with transnasal surgery.

[0004] Currently, most commercially available nasal protective sheaths for transnasal surgery are cylindrical protective sheaths made of silicone. However, to increase the surgical field of view, these sheaths are often made very thin, which can easily lead to insufficient support. Furthermore, the silicone has high friction with the instrument surface when the sheath is inserted into the nasal cavity, making it difficult to deliver. Once inserted, the sheath has poor stability, lacks a lateral notch, and cannot effectively perform lateral septal surgery, causing significant clinical challenges. These are the shortcomings of existing technologies. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a nasal cavity protective sleeve and its delivery device for a transnasal endoscopic surgical channel, which addresses the shortcomings of the existing technology. The nasal cavity protective sleeve has strong support, is easy to deliver, and effectively improves the stability of the nasal cavity protective sleeve after it is inserted into the nasal cavity.

[0006] This solution is achieved through the following technical measures: a nasal cavity protective sleeve and its delivery device for a transnasal endoscopic surgical channel. The nasal cavity protective sleeve has a through hole inside. The nasal cavity protective sleeve includes an inlet part, a limiting part, and an extension part connected in sequence. The inlet part is generally funnel-shaped. A thrust ring is provided at the end of the inlet part away from the limiting part. The limiting part is located at the junction of the inlet part and the extension part and has the smallest cross-section. The top of the extension part is horizontal in the axial direction, and the bottom of the extension part is axially inclined downward.

[0007] The conveying device includes a conveyor I, which includes a core rod I and a movable rod I that cooperates with the core rod I. The front end of the core rod I is provided with an elastic head with an opening. The front part of the movable rod I is provided with a convex cylinder, which can be engaged with the elastic head. After the convex cylinder is engaged with the elastic head, the movable rod I can rotate around the axis of the convex cylinder.

[0008] Preferably, a positioning groove is provided at the lower end of the opening, and a positioning post that cooperates with the positioning groove is fixedly provided at the front end of the convex cylinder.

[0009] Preferably, a pressure gap I is provided between the core rod I and the movable rod I after assembly.

[0010] Preferably, the rear end of the core rod I is provided with a push handle I, the push handle I is provided with anti-slip texture I, and the push handle I is provided with a push plate I; the rear end of the movable rod I is provided with a push handle II, the push handle II is provided with anti-slip texture II, and the push handle II is provided with a push plate II; the front end of the elastic head is an arc-shaped protrusion; the distance between the push handle I and the elastic head is greater than the axial length of the nasal cavity protective sleeve; the opening angle of the opening is α, 75° < α < 85°.

[0011] Preferably, the bottom of the extension is axially inclined downward at 15°-25°; the upper part of the thrust ring is provided with a notch; the top of the extension is provided with a triangular protrusion that matches the shape of the nasal cavity; the extension is provided with a cut at the end away from the limiting part; the cut is provided with one or two, and when there are two cuts, the two cuts are symmetrically arranged on both sides of the triangular protrusion; the extension is provided with reinforcing ribs, including circumferential reinforcing ribs and axial reinforcing ribs; the nasal cavity protective sleeve is made of silicone rubber or polyurethane material; the cross-section of the thrust ring is arc-shaped and folded outward.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] (1) The delivery device I is a tool for delivering the nasal protective sleeve into the nasal cavity and can be used flexibly according to clinical needs. The delivery device I is designed as a split type, which is convenient to assemble with the nasal protective sleeve and convenient to disassemble and pull out after the nasal protective sleeve is inserted. Specifically: When using the delivery device I, firstly, the convex cylinder of the movable rod I is inserted into the elastic head, and the positioning pin at the front end of the movable rod I is inserted into the positioning groove. At this time, the positioning groove can restrict the left and right movement of the movable rod I. The movable rod I can rotate around the axis of the convex cylinder. Then, the nasal protective sleeve is put into the core rod I and the nasal protective sleeve is wound along the core rod I. After the winding is completed, the axial tail end of the nasal protective sleeve after rotation needs to be adjusted so that it is located on the upper surface of the core rod I. Then, the movable rod I is rotated so that it forms a squeeze on the axial tail end of the nasal protective sleeve. At this time, the nasal protective sleeve is quickly sent into the designated position in the nasal cavity. Then, the movable rod I is pulled out. At this time, the nasal protective sleeve recovers its shape under its own elastic force. Finally, the core rod I is pulled out from the through hole of the nasal protective sleeve, and then the position of the nasal protective sleeve is adjusted appropriately. After assembly, the movable rod I and the core rod I have a pressure gap I in between, which effectively prevents the nasal protective sleeve from wrapping too thickly around the core rod I, causing deformation of both the movable rod I and the core rod I. A push handle I, a push handle II, anti-slip texture I, and anti-slip texture II are provided to facilitate control of the core rod I and the movable rod I when delivering the nasal protective sleeve into the nasal cavity. The front end of the elastic head is an arc-shaped protrusion, effectively preventing the core rod I from inserting into the nasal cavity and causing damage. The distance between the front end of the push handle I and the rear end of the elastic head is greater than the axial length of the nasal protective sleeve, effectively ensuring that the nasal protective sleeve is wrapped between the push handle I and the elastic head. Push plates I and II are provided to facilitate operation of the core rod I and the movable rod I.

[0014] (2) The insertion part of the nasal cavity protector is equipped with a thrust ring. The cross-section of the thrust ring is arc-shaped and folded outward, which can effectively prevent the nasal cavity protector from sliding into the nasal cavity, making it more stable to use. The top of the extension part is equipped with a triangular protrusion, which conforms to the shape of the nasal cavity and effectively prevents the nasal cavity protector from rotating during surgery. The upper part of the thrust ring is equipped with a notch, which can guide the orientation of the nasal cavity protector after it is inserted into the nasal cavity. The side of the extension part is equipped with an incision for septoplasty, which is convenient for use. The extension part is equipped with axial and circumferential reinforcing ribs, which can effectively increase the overall support of the nasal cavity protector.

[0015] A nasal cavity protective sleeve and its delivery device for a transnasal endoscopic surgical channel, wherein the nasal cavity protective sleeve has a through hole inside, and the nasal cavity protective sleeve includes an inlet part, a limiting part and an extension part connected in sequence. The inlet part is generally funnel-shaped, and a thrust ring is provided at the end of the inlet part away from the limiting part. The limiting part is located at the junction of the inlet part and the extension part and has the smallest cross-section. The top of the extension part is axially horizontal, and the bottom of the extension part is axially inclined downward.

[0016] The conveying device includes a conveyor II, which includes a core rod II and a movable rod II that cooperates with the core rod II. The front end of the core rod II is provided with a raised through part, and the through part is provided with a through hole. The front end of the movable rod II is provided with a limiting post that can be slidably connected with the through hole. After the core rod II and the movable rod II are assembled, a pressure gap II is provided between the core rod II and the movable rod II. The height of the pressure gap II is less than the superimposed wall thickness of the nasal cavity protective sleeve wrapped around the core rod II.

[0017] Preferably, the core rod II is provided with a transition platform for inserting the limiting post into the through hole, and the transition platform is inclined downward toward the front end of the core rod II.

[0018] Preferably, the rear end of the core rod II is provided with a push handle III, the push handle III is provided with anti-slip texture III, and the push handle III is provided with a push plate III; the rear end of the movable rod II is provided with a push handle IV, the push handle IV is provided with anti-slip texture IV, and the push handle IV is provided with a push plate IV; the length between the front end of the push handle III and the rear end of the through part is greater than the axial length of the nasal cavity protective sleeve.

[0019] Preferably, the rear end of the booster handle III is provided with a limiting platform I, and the rear end of the booster handle IV is provided with a limiting platform II that cooperates with the limiting platform I.

[0020] Preferably, the bottom of the extension is axially inclined downward at 15°-25°; the upper part of the thrust ring is provided with a notch; the top of the extension is provided with a triangular protrusion that matches the shape of the nasal cavity; the extension is provided with a cut at the end away from the limiting part; the cut is provided with one or two, and when there are two cuts, the two cuts are symmetrically arranged on both sides of the triangular protrusion; the extension is provided with reinforcing ribs, including circumferential reinforcing ribs and axial reinforcing ribs; the nasal cavity protective sleeve is made of silicone rubber or polyurethane material; the cross-section of the thrust ring is arc-shaped and folded outward.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] (1) The delivery device II serves as a tool for delivering the nasal protective sleeve into the nasal cavity and can be used flexibly according to clinical needs. The delivery device II is designed as a split type, which is convenient to assemble with the nasal protective sleeve and convenient to disassemble and pull out after the nasal protective sleeve is inserted. Specifically: when using the delivery device II, firstly, the nasal protective sleeve is put into the core rod II, and then the nasal protective sleeve is wound around the core rod II. After winding, the axial tail end of the nasal protective sleeve needs to be adjusted so that it is located on the upper surface of the core rod II. Then, the limiting post of the movable rod II is inserted into the through hole of the core rod II to compress the nasal protective sleeve. At this time, the nasal protective sleeve is quickly sent into the designated position in the nasal cavity. Then, the movable rod II is pulled out. At this time, the nasal protective sleeve recovers its shape under its own elastic force. Finally, the core rod II is pulled out from the through hole of the nasal protective sleeve, and then the position of the nasal protective sleeve is adjusted appropriately. The height of the pressure gap II is less than the superimposed wall thickness of the nasal protective sleeve wound on the core rod II, which can ensure that the movable rod II can compress the nasal protective sleeve. The device is equipped with push handle III, push handle IV, and anti-slip textures III and IV to facilitate the control of the core rod II and movable rod II when delivering the nasal protective sleeve into the nasal cavity. The length between the front end of the push handle III and the rear end of the through part is greater than the axial length of the nasal protective sleeve, effectively ensuring that the nasal protective sleeve is wrapped between the push handle III and the through part. Limiting platforms I and II are provided to ensure that a pressure gap II is formed between the core rod II and the movable rod II. Push plates III and IV are provided to facilitate the operation of the core rod II and the movable rod II.

[0023] (2) A thrust ring is provided on one side of the inlet portion of the nasal cavity protector. The cross-section of the thrust ring is arc-shaped and folded outward, which can effectively prevent the nasal cavity protector from sliding into the nasal cavity, making it more stable to use. A triangular protrusion is provided at the top of the extension portion, which conforms to the shape of the nasal cavity and effectively prevents the nasal cavity protector from rotating during surgery. A notch is provided at the upper part of the inlet portion, which can guide the orientation of the nasal cavity protector after it is inserted into the nasal cavity. An incision is provided on the side of the nasal cavity protector to facilitate septoplasty, making it convenient to use. Axial and circumferential reinforcing ribs are provided on the extension portion, which can effectively increase the overall support of the nasal cavity protector.

[0024] Therefore, it is evident that the present invention has outstanding substantive features and significant progress compared with the prior art, and the beneficial effects of its implementation are also obvious. Attached Figure Description

[0025] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A cross-sectional view of conveyor I after assembly;

[0027] Figure 2 for Figure 1 A magnified structural diagram of part A in the diagram;

[0028] Figure 3 This is a schematic diagram of the split structure of Conveyor I;

[0029] Figure 4 A schematic diagram of the nasal cavity protective sleeve fitted onto core rod I;

[0030] Figure 5 A schematic diagram of the structure of the nasal cavity protective sleeve wrapped around the core rod I;

[0031] Figure 6 A cross-sectional view of the assembled conveyor II;

[0032] Figure 7 This is a schematic diagram of the split structure of Conveyor II;

[0033] Figure 8 A schematic diagram of the nasal cavity protective sleeve fitted onto core rod II;

[0034] Figure 9 A schematic diagram of the structure of the nasal cavity protective sleeve wrapped around the core rod II;

[0035] Figure 10 A schematic diagram of the structure of a nasal cavity protector (single-sided incision);

[0036] Figure 11 for Figure 10 Front view structural diagram;

[0037] Figure 12 for Figure 10 A schematic diagram of the side view structure;

[0038] Figure 13 This is a schematic diagram of the structure of a nasal cavity protector (with incisions on both sides).

[0039] In the diagram: 1-Nasal cavity protective sleeve, 1.1-Introduction part, 1.2-Limiting part, 1.3-Extension part, 1.3.1-Triangular protrusion, 1.3.2-Incision, 1.4-Thrust ring, 1.4.1-Notch, 2-Moving rod I, 2.1-Convex cylinder, 2.2 Positioning post, 2.3-Boosting handle II, 2.4-Anti-slip texture II, 2.5-Boosting plate II, 3-Core rod I, 3.1-Elastic head, 3.2-Positioning groove, 3.3-Boosting handle I 3.4-Anti-slip texture I, 3.5-Arched protrusion, 3.6-Boosting plate I, 4-Pressure gap I, 5-Moving rod II, 5.1-Limiting post, 5.2-Boosting handle IV, 5.3-Anti-slip texture IV, 5.4-Limiting platform II, 5.5-Boosting plate IV, 6-Core rod II, 6.1-Through hole, 6.2-Transition platform, 6.3-Boosting handle III, 6.4-Anti-slip texture III, 6.5-Limiting platform I, 6.6-Boosting plate III, 7-Pressure gap II. Detailed Implementation

[0040] To make the objectives, features, and advantages of this invention more apparent and understandable, specific embodiments and accompanying drawings will be used to clearly and completely describe the technical solutions protected by this invention. Obviously, the embodiments described below are only a part of the embodiments of this invention, and not all of them. Based on the embodiments in this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0041] Example 1

[0042] like Figure 1-5 As shown in Figures 10-13, a nasal cavity protective sleeve and its delivery device for a transnasal endoscopic surgical channel are disclosed. The delivery device includes a delivery unit I, which includes a core rod I3 and a movable rod I2 that cooperates with the core rod I3. The front end of the core rod I3 is provided with an elastic head 3.1, which has an opening. The front part of the movable rod I2 is provided with a convex cylinder 2.1, which can be engaged with the elastic head 3.1. After the convex cylinder 2.1 is engaged with the elastic head 3.1, the movable rod I2 can rotate around the axis of the convex cylinder 2.1.

[0043] A positioning groove 3.2 is provided inside the opening, and a positioning post 2.2 that mates with the positioning groove 3.2 is fixedly provided at the front end of the convex cylinder 2.1. A pressure gap 14 is provided between the core rod I3 and the movable rod I2 after assembly. A push handle I3.3 is provided at the rear end of the core rod I3, and anti-slip texture I3.4 and a push plate I3.6 are provided on the push handle I3.3. A push handle II2.3 is provided at the rear end of the movable rod I2, and anti-slip texture II2.4 and a push plate II2.5 are provided on the push handle II2.3. The front end of the elastic head 3.1 is an arc-shaped protrusion 3.5. The distance between the front end 3.3 of the push handle I and the rear end of the elastic head 3.1 is greater than the axial length of the nasal cavity protective sleeve 1. The opening angle of the opening is α, where 75° < α < 85°. The booster handle I 3.3 is semi-cylindrical and has a weight reduction groove. The booster handle II 2.3 is also semi-cylindrical and has a weight reduction groove.

[0044] The nasal cavity protector 1 has a through hole inside. The nasal cavity protector 1 includes an inlet portion 1.1, a limiting portion 1.2, and an extension portion 1.3. The inlet portion 1.1 is generally funnel-shaped, and its port is provided with a thrust ring 1.4. The thrust ring 1.4 has an arc-shaped cross-section that folds outwards, and a notch 1.4.1 on its upper part to indicate the vertical direction of the nasal cavity protector 1. The limiting portion 1.2 is located at the junction of the inlet portion 1.1 and the extension portion 1.3 and maintains a minimum cross-sectional area. The top of the extension portion 1.3 is horizontal, and the bottom is inclined downwards at a 15°-25° angle. The top of the extension portion 1.3 has a triangular protrusion 1.3.1 that conforms to the shape of the nasal cavity. The extension portion 1.3 has axial and circumferential reinforcing ribs, and a cut 1.3.2 on its side.

[0045] The nasal cavity protective cover 1 is made of silicone rubber, polyurethane, or other plastics with strong elastic recovery capabilities.

[0046] like Figure 10 As shown, the extension 1.3 is provided with a cut 1.3.2, which is located on one side of the triangular protrusion 1.3.1.

[0047] like Figure 13 As shown, the extension 1.3 has two incisions 1.3.2, which are symmetrically arranged on both sides of the triangular protrusion 1.3.1. The nasal cavity protective sleeve 1 has greater applicability and can be used for surgery in both the left and right nasal cavities.

[0048] The delivery device I serves as a tool for delivering the nasal protective sleeve 1 into the nasal cavity and can be used flexibly according to clinical needs. The delivery device I is designed as a separate unit, facilitating easy assembly with the nasal protective sleeve 1 and easy disassembly and removal after insertion. Specifically: when using the delivery device I, firstly, the convex cylinder 2.1 of the movable rod I2 is inserted into the elastic head 3.1, and the positioning pin 2.2 at the front end of the movable rod I2 is inserted into the positioning groove 3.2. At this time, the positioning groove 3.2 can restrict the left and right movement of the movable rod I2, allowing the movable rod I2 to rotate around the axis of the convex cylinder 2.1. Then, the nasal protective sleeve 1 is fitted onto the core rod I3, with the inlet portion 1.1 of the nasal protective sleeve 1 facing the push handle I3. 3. Wrap the nasal sleeve 1 around the core rod I3 circumferentially. After wrapping, adjust the axial tail end of the rotated nasal sleeve 1 so that it is located on the upper surface of the core rod I3. Then rotate the movable rod I2 to compress the axial tail end of the nasal sleeve 1. At this time, quickly insert the nasal sleeve 1 into the designated position in the nasal cavity. Then pull the movable rod I2 out. At this time, the nasal sleeve 1 will recover its shape under its own elasticity. Finally, pull the core rod I3 out through the through hole of the nasal sleeve. Then adjust the position of the nasal sleeve 1 appropriately through the notch 1.4.1. After the movable rod I2 and the core rod I3 are assembled, a pressure gap I4 is provided in the middle to effectively prevent the nasal sleeve 1 from being wrapped too thickly on the core rod I3, causing deformation of the movable rod I2 and the core rod I3. The push handle I3.3, push handle II2.3, anti-slip texture I3.4, and anti-slip texture II2.4 are provided to facilitate the control of the core rod I3 and the movable rod I2 when delivering the nasal sleeve 1 into the nasal cavity. The front end of the elastic head 3.1 is an arc-shaped protrusion, which effectively prevents the core rod I3 from being inserted into the nasal cavity and causing damage. The distance between the front end of the push handle I3.3 and the rear end of the elastic head 3.1 is greater than the axial length of the nasal cavity protective sleeve 1, which effectively ensures that the nasal cavity protective sleeve 1 is wrapped between the push handle I3.3 and the elastic head 3.1.

[0049] A thrust ring 1.4 is provided on one side of the insertion part 1.1. The cross-section of the thrust ring 1.4 is arc-shaped and folded outward, which can effectively prevent the nasal protective sleeve 1 from sliding into the nasal cavity, making it more stable to use. A triangular protrusion 1.3.1 is provided at the top of the extension part 1.3, which conforms to the shape of the nasal cavity and effectively prevents the nasal protective sleeve 1 from rotating during surgery. A notch 1.4.1 is provided at the upper end of the thrust ring 1.4, which can guide the orientation of the nasal protective sleeve 1 after it is inserted into the nasal cavity. An incision 1.3.2 is provided on the side of the extension part 1.3 to facilitate septoplasty, making it convenient to use. Axial and circumferential reinforcing ribs are provided on the extension part 1.3, which can effectively increase the overall support of the nasal protective sleeve 1.

[0050] Example 2

[0051] like Figure 6-13As shown, a nasal cavity protective sleeve and its delivery device are disclosed via a nasal endoscopic surgical channel. The delivery device includes a delivery unit II, which includes a core rod II6 and a movable rod II5 that cooperates with the core rod II6. The front end of the core rod II6 is provided with a raised through portion, and the through portion is provided with a through hole 6.1. The front end of the movable rod II5 is provided with a limiting post 5.1 that can be slidably connected with the through hole 6.1. After the core rod II6 and the movable rod II5 are assembled, a pressure gap II7 is provided between the core rod II6 and the movable rod II5. The height of the pressure gap II7 is less than the superimposed wall thickness of the nasal cavity protective sleeve 1 wrapped around the core rod II6.

[0052] The core rod II 6 is provided with a transition platform 6.2 for the insertion of the limiting post 5.1 into the through hole 6.1. The transition platform 6.2 is inclined downward toward the front end of the core rod II 6.

[0053] The rear end of the core rod II6 is provided with a push handle III6.3, which has anti-slip texture III6.4 and a push plate III6.6. The rear end of the movable rod II5 is provided with a push handle IV5.2, which has anti-slip texture IV5.3 and a push plate IV5.5. The length between the front end of the push handle III6.3 and the rear end of the through part is greater than the axial length of the nasal cavity protective sleeve 1.

[0054] The rear end of the booster handle Ⅲ6.3 is provided with a limiting platform Ⅰ6.5, and the rear end of the booster handle Ⅳ5.2 is provided with a limiting platform Ⅱ5.4 that cooperates with the limiting platform Ⅰ6.5.

[0055] The nasal cavity protector 1 has a through hole inside. The nasal cavity protector 1 includes an inlet portion 1.1, a limiting portion 1.2, and an extension portion 1.3. The inlet portion 1.1 is generally funnel-shaped. A thrust ring 1.4 is provided at the end of the inlet portion 1.1 away from the limiting portion 1.2. The thrust ring 1.4 has an arc-shaped cross-section that folds outwards. A notch 1.4.1 is provided on the upper part of the thrust ring 1.4 to indicate the vertical direction of the nasal cavity protector 1. The limiting portion 1.2 is located at the junction of the inlet portion 1.1 and the extension portion 1.3 and maintains a minimum cross-section. The top of the extension portion 1.3 is horizontal, and the bottom is inclined downwards at a 15°-25° angle. A triangular protrusion 1.3.1 is provided on the top of the extension portion 1.3, which conforms to the shape of the nasal cavity. The extension portion 1.3 has axial and circumferential reinforcing ribs, and a cut 1.3.2 is provided on the side of the extension portion 1.3.

[0056] The nasal cavity protective cover 1 is made of silicone rubber, polyurethane, or other plastics with strong elastic recovery capabilities.

[0057] like Figure 10As shown, the extension 1.3 is provided with a cut 1.3.2, which is located on one side of the triangular protrusion 1.3.1.

[0058] like Figure 13 As shown, the extension 1.3 has two incisions 1.3.2, which are symmetrically arranged on both sides of the triangular protrusion 1.3.1. The nasal cavity protective sleeve 1 has greater applicability and can be used for surgery in both the left and right nasal cavities.

[0059] The delivery device II serves as a tool for delivering the nasal protective sleeve 1 into the nasal cavity and can be used flexibly according to clinical needs. The conveyor II is designed as a split type, which facilitates assembly with the nasal cavity protective sleeve 1 and allows for easy disassembly and removal after the nasal cavity protective sleeve 1 is inserted. Specifically, when using the conveyor II, the nasal cavity protective sleeve 1 is first fitted onto the core rod II 6, with the inlet 1.1 of the nasal cavity protective sleeve 1 facing the push handle III 6.3. Then, the nasal cavity protective sleeve 1 is wound around the core rod II 6 circumferentially. After winding, the axial tail end of the nasal cavity protective sleeve 1 needs to be adjusted so that it is located on the upper surface of the core rod II 6. Then, the limiting post 5.1 of the movable rod II 5 is inserted into the through hole 6.1 of the core rod II 6, which compresses the nasal cavity protective sleeve 1. At this time, the nasal cavity protective sleeve 1 is quickly sent into the designated position in the nasal cavity. Then, the movable rod II 5 is pulled out. At this time, the nasal cavity protective sleeve 1 returns to its shape under its own elasticity. Finally, the core rod II 6 is pulled out from the through hole of the nasal cavity protective sleeve 1, and then the position of the nasal cavity protective sleeve 1 is adjusted appropriately through the notch 1.4.1. The height of the pressure gap II7 is less than the combined wall thickness of the nasal protective sleeve 1 wrapped around the core rod II6, ensuring that the movable rod II5 can compress the nasal protective sleeve 1. The presence of push handles III6.3, IV5.2, III6.4, and IV5.3 facilitates control of the core rod II6 and movable rod II5 when delivering the nasal protective sleeve 1 into the nasal cavity. The length between the front end of the push handle III6.3 and the rear end of the through section is greater than the axial length of the nasal protective sleeve 1, effectively ensuring that the nasal protective sleeve 1 is wrapped between the push handle III6.3 and the through section. The presence of limiting platforms I6.5 and II5.4 ensures the formation of the pressure gap II7 between the core rod II6 and the movable rod II5.

[0060] A thrust ring 1.4 is provided on one side of the insertion part 1.1. The cross-section of the thrust ring 1.4 is arc-shaped and folded outward to prevent the nasal cavity protector 1 from sliding inward, making it more stable in use. A triangular protrusion 1.3.1 is provided at the top of the extension part 1.3, which conforms to the shape of the nasal cavity and effectively prevents the nasal cavity protector 1 from rotating during surgery. A notch 1.4.1 is provided at the upper end of the thrust ring 1.4, which can guide the orientation of the nasal cavity protector 1 after it is inserted into the nasal cavity. An incision 1.3.2 is provided on the side of the extension part 1.3 to facilitate septoplasty, making it convenient to use. Axial and circumferential reinforcing ribs are provided on the extension part 1.3, which can effectively increase the overall support of the nasal cavity protector 1.

[0061] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0062] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles, novel features, and inventiveness disclosed herein.

Claims

1. A nasal cavity protective sheath for transnasal endoscopic surgery, characterized in that: The nasal cavity protective sleeve (1) has a through hole inside. The nasal cavity protective sleeve (1) includes an inlet (1.1), a limiting part (1.2), and an extension part (1.3) connected in sequence. The inlet (1.1) is generally funnel-shaped. A thrust ring (1.4) is provided at the end of the inlet (1.1) away from the limiting part (1.2). The limiting part (1.2) is located at the junction of the inlet (1.1) and the extension part (1.3) and the limiting part (1.2) has the smallest cross-section. The top of the extension part (1.3) is horizontal and the bottom of the extension part (1.3) is axially inclined downward. It also includes a conveying device for a nasal cavity protective sleeve (1), the conveying device including a conveyor I, the conveyor I including a core rod I (3) and a movable rod I (2) cooperating with the core rod I (3), the front end of the core rod I (3) is provided with an elastic head (3.1), the elastic head (3.1) is provided with an opening, the front part of the movable rod I (2) is provided with a convex cylinder (2.1), the convex cylinder (2.1) can be engaged with the elastic head (3.1), after the convex cylinder (2.1) is engaged with the elastic head (3.1), the movable rod I (2) can rotate around the axis of the convex cylinder (2.1); The rear end of the core rod I (3) is provided with a push handle I (3.3), the push handle I (3.3) is provided with anti-slip texture I (3.4), and the push handle I (3.3) is provided with a push plate I (3.6); the rear end of the movable rod I (2) is provided with a push handle II (2.3), the push handle II (2.3) is provided with anti-slip texture II (2.4), and the push handle II (2.3) is provided with a push plate II (2.5); the front end of the elastic head (3.1) is an arc-shaped protrusion (3.5); the distance between the front end of the push handle I (3.3) and the rear end of the elastic head (3.1) is greater than the axial length of the nasal cavity protective sleeve (1); the opening angle of the opening is α, 75° < α < 85°.

2. The nasal cavity protective sheath for transnasal endoscopic surgical access according to claim 1, characterized in that: The lower end of the opening is provided with a positioning groove (3.2), and the front end of the convex cylinder (2.1) is fixedly provided with a positioning post (2.2) that cooperates with the positioning groove (3.2).

3. The nasal cavity protective sheath for transnasal endoscopic surgical access according to claim 1, characterized in that: After the core rod I (3) and the movable rod I (2) are assembled, a pressure gap I (4) is provided in the middle.

4. The nasal cavity protective sheath for transnasal endoscopic surgical access according to claim 1, characterized in that: The bottom of the extension (1.3) is axially inclined downward at 15°-25°; the upper part of the thrust ring (1.4) is provided with a notch (1.4.1); the top of the extension (1.3) is provided with a triangular protrusion (1.3.1) that matches the shape of the nasal cavity; the extension (1.3) is provided with a cut (1.3.2) at one end away from the limiting part (1.2); the cut (1.3.2) is provided with one or two, and when the cut (1.3.2) is provided with two, the two cuts (1.3.2) are symmetrically arranged on both sides of the triangular protrusion (1.3.1); the extension (1.3) is provided with reinforcing ribs, the reinforcing ribs include circumferential reinforcing ribs and axial reinforcing ribs; the nasal cavity protective sleeve (1) is a nasal cavity protective sleeve (1) made of silicone rubber material or polyurethane material; the cross section of the thrust ring (1.4) is arc-shaped and folded outward.

5. A nasal cavity protective sheath for transnasal endoscopic surgery, characterized in that: The nasal cavity protective sleeve (1) has a through hole inside. The nasal cavity protective sleeve (1) includes an inlet (1.1), a limiting part (1.2), and an extension part (1.3) connected in sequence. The inlet (1.1) is generally funnel-shaped. A thrust ring (1.4) is provided at the end of the inlet (1.1) away from the limiting part (1.2). The limiting part (1.2) is located at the junction of the inlet (1.1) and the extension part (1.3) and the limiting part (1.2) has the smallest cross-section. The top of the extension part (1.3) is horizontal and the bottom of the extension part (1.3) is axially inclined downward. It also includes a conveying device for the nasal cavity protective sleeve (1), the conveying device including a conveyor II, the conveyor II including a core rod II (6) and a movable rod II (5) that cooperates with the core rod II (6), the front end of the core rod II (6) is provided with a raised through part, the through part is provided with a through hole (6.1), the front end of the movable rod II (5) is provided with a limiting post (5.1) that can be slidably connected with the through hole (6.1), after the core rod II (6) and the movable rod II (5) are assembled, a pressure gap II (7) is provided between the core rod II (6) and the movable rod II (5), the height of the pressure gap II (7) is less than the superimposed wall thickness of the nasal cavity protective sleeve (1) wrapped around the core rod II (6).

6. The nasal cavity protective sheath for transnasal endoscopic surgical access according to claim 5, characterized in that: The core rod II (6) is provided with a transition platform (6.2) for inserting the limiting post (5.1) into the through hole (6.1), and the transition platform (6.2) is inclined downward toward the front end of the core rod II (6).

7. The nasal cavity protective sheath for transnasal endoscopic surgical access according to claim 5, characterized in that: The rear end of the core rod II (6) is provided with a push handle III (6.3), the push handle III (6.3) is provided with anti-slip texture III (6.4), and the push handle III (6.3) is provided with a push plate III (6.6); the rear end of the movable rod II (5) is provided with a push handle IV (5.2), the push handle IV (5.2) is provided with anti-slip texture IV (5.3), and the push handle IV (5.2) is provided with a push plate IV (5.5); the length between the front end of the push handle III (6.3) and the rear end of the through part is greater than the axial length of the nasal cavity protective sleeve (1).

8. The nasal cavity protective sheath for transnasal endoscopic surgical access according to claim 7, characterized in that: The rear end of the booster handle Ⅲ (6.3) is provided with a limiting platform Ⅰ (6.5), and the rear end of the booster handle Ⅳ (5.2) is provided with a limiting platform Ⅱ (5.4) that cooperates with the limiting platform Ⅰ (6.5).

9. The nasal cavity protective sheath for transnasal endoscopic surgical access according to claim 5, characterized in that: The bottom of the extension (1.3) is axially inclined downward at 15°-25°; the upper part of the thrust ring (1.4) is provided with a notch (1.4.1); the top of the extension (1.3) is provided with a triangular protrusion (1.3.1) that matches the shape of the nasal cavity; the extension (1.3) is provided with a cut (1.3.2) at one end away from the limiting part (1.2); the cut (1.3.2) is provided with one or two, and when the cut (1.3.2) is provided with two, the two cuts (1.3.2) are symmetrically arranged on both sides of the triangular protrusion (1.3.1); the extension (1.3) is provided with reinforcing ribs, the reinforcing ribs include circumferential reinforcing ribs and axial reinforcing ribs; the nasal cavity protective sleeve (1) is a nasal cavity protective sleeve (1) made of silicone rubber material or polyurethane material; the cross section of the thrust ring (1.4) is arc-shaped and folded outward.

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