Nasal spray tip and device

Abstract

The application discloses a nasal spray nozzle and a nasal spray device, and belongs to the technical field of medical devices. The nozzle comprises an extension pipe, an adjusting pipe, a limiting cone pipe and a driving pipe. The front end of the extension pipe is provided with a nozzle, and the spray direction forms an acute angle with the length direction of the extension pipe. The adjusting pipe is axially limited and circumferentially rotationally matched with the extension pipe, and the outer wall is provided with an elongated pressing plate. The limiting cone pipe is sleeved on the extension pipe, and the base is provided with a sliding pin. The driving pipe is sleeved outside the adjusting pipe, and the inner wall is provided with a spiral groove track. Rotating the adjusting pipe can adjust the included angle between the spray direction of the nozzle and the length direction of the pressing plate. Rotating the driving pipe can drive the limiting cone pipe to axially move, and adjust the length of the extension pipe extending out of the limiting cone pipe. The nozzle can be adapted to different anatomical features after nasal sinus surgery, and precise, convenient and safe nasal cavity drug delivery can be realized.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a nasal drug delivery device, and more particularly to a nasal spray nozzle and nasal spray device for precise drug delivery after sinus surgery. Background Technology

[0002] Nasal nebulization is a common method for treating rhinitis, nasal polyps, and post-nasal surgery conditions. Nasal nebulizers typically include a bottle, a pump unit, a nozzle assembly, and a protective cap. Pressing the pump dispenses the medication as a mist into the nasal cavity. For example, Chinese utility model patent CN 217391328 U discloses a nasal nebulizer that includes a bottomless bottle, a needle, a nozzle assembly, and a cap. Pressing the nozzle assembly sprays the liquid from the bottle as a mist. While this device simplifies the operation, its nozzle is a fixed, straight nozzle with the spray direction aligned with the nozzle's axis, and its short length prevents it from reaching deep into the nasal cavity.

[0003] However, the nasal cavity's anatomy resembles an inverted triangular pyramid, making it difficult for conventional direct-dose spray nozzles to completely cover the entire nasal mucosa. For post-sinus surgery patients, post-operative medication needs to cover different anatomical areas such as the frontal recess, frontal sinus, maxillary sinus, and sphenoid sinus. Due to the varying anatomical locations of the four pairs of sinuses in the human body, and the influence of age, sex, race, and surgical procedures (such as Draf type I, II, and III frontal sinusotomy), there are significant individual differences in the distance from the anterior nasal skin margin to each sinus among different patients. For example, the distance from the anterior nasal skin margin to the maxillary sinus is approximately 4.2-6.0 cm, to the frontal sinus approximately 4.3-6.9 cm, and to the sphenoid sinus approximately 6-6.5 cm.

[0004] Existing nasal spray devices generally have the following shortcomings: First, the nozzle length is fixed and relatively short, making it difficult to reach the deep nasal cavity and the openings of distal sinuses such as the frontal and sphenoid sinuses, and also failing to effectively cover the maxillary sinus, whose opening is located further outward. Second, the spray direction is singular, making it impossible to flexibly adjust the spray angle according to the lesion site; even slight deviations in patient position or spray direction may result in the medication not covering the target area. Third, the lack of effective depth limiting and indicating devices makes it difficult for patients to accurately control the nozzle insertion depth, easily leading to uneven drug distribution, overdose, or damage to the nasal mucosa. Long-term use of nozzles with a single direction and length can easily lead to insufficient drug coverage, affecting the postoperative mucosal epithelialization process, and even causing polyp recurrence in areas such as the frontal recess.

[0005] Therefore, there is an urgent need for a nasal spray nozzle that can simultaneously adjust the nozzle insertion depth and spray direction, and adapt to different postoperative anatomical characteristics of sinus surgery, so as to achieve precise and convenient nasal drug delivery and promote rapid postoperative mucosal epithelialization. Summary of the Invention

[0006] In view of the technical shortcomings of existing nasal spray devices, such as fixed nozzle length, single spray direction, and difficulty in adapting to the deep nasal cavity and different sinus anatomy, the purpose of this invention is to provide a nasal spray nozzle and nasal spray device that can simultaneously adjust the spray direction and the relative depth of the extension tube into the nasal cavity to adapt to different postoperative sinus anatomy characteristics, thereby achieving precise, convenient and safe nasal drug delivery.

[0007] To achieve the above-mentioned objective, the present invention provides a nasal spray nozzle, comprising: An extension tube, the lower end of which has a connector for connecting to a nasal spray tube or pressure head, and the front end of which has a nozzle, the spray direction of which forms an acute angle with the length direction of the extension tube. An adjusting tube is sleeved on the lower end of the extension tube and is axially limited and circumferentially rotated with the extension tube. The wall of the adjusting tube is provided with an axial guide groove, and the outer wall of the adjusting tube is provided with a long strip-shaped pressure plate. A limiting cone tube is sleeved on the extension tube and located between the nozzle and the adjusting tube. The base of the limiting cone tube is provided with a sliding pin, which passes through the guide groove. A drive tube is sleeved outside the adjustment tube and rotates with the adjustment tube while being axially limited. The inner wall of the drive tube is provided with a spiral groove, and the sliding pin slides with the spiral groove. Rotating the adjusting tube can adjust the angle between the spray direction of the nozzle and the length direction of the pressure plate; rotating the driving tube can drive the limiting cone tube to move axially along the extension tube to adjust the length of the extension tube extending out of the limiting cone tube.

[0008] In a preferred embodiment of the present invention, the diameter of the limiting cone tube is larger than the diameter of the human nostril, and it is used to contact the outer edge of the nostril to limit the depth of the extension tube into the nasal cavity. Through this limiting design, the limiting cone tube forms a physical stop with the outer edge of the nostril, preventing the extension tube from being excessively inserted into the nasal cavity and damaging the nasal mucosa, while ensuring that the nozzle is positioned at the front end of the target drug delivery area, providing a depth reference for precise drug delivery.

[0009] In a preferred embodiment of the present invention, the extension tube has graduation lines on its wall, which indicate the length of the extension tube extending beyond the limiting cone tube. Through the visual indication of the graduation lines, the user can intuitively read the exposed length of the extension tube, thereby precisely adjusting the nozzle position in the nasal cavity according to preoperative measurements or medical orders, avoiding insufficient or excessive drug delivery.

[0010] In a preferred embodiment of the present invention, there are two sliding pins, which are symmetrically arranged on a diameter line of the horizontal cross-section circle of the limiting cone tube; there are two spiral grooves, which are correspondingly arranged on the inner wall of the drive tube. Through the symmetrical arrangement of the double pins and double rails, the limiting cone tube experiences uniform force during axial movement, avoiding skewness or jamming caused by unilateral force, and ensuring smooth depth adjustment and positioning stability.

[0011] In a preferred embodiment of the present invention, the pressure plate is an elliptical or rectangular plate. Through its elongated plate design, the length of the pressure plate is greater than its width. The user can adjust the relative angle between the length of the pressure plate and the spray direction of the nozzle according to the target sinus location, ensuring that the finger pressing direction is consistent with the spray direction. This facilitates precise spraying in specific body positions and improves user comfort.

[0012] In a preferred embodiment of the present invention, the diameter of the extension tube is 2.5~3.5 mm, and / or the maximum extension length of the extension tube relative to the limiting cone tube is 4~5 cm. By controlling the diameter of the extension tube to 2.5~3.5 mm, both the unobstructed drug delivery channel and the ability of the tube to smoothly enter the narrow area of ​​the nasal cavity are ensured; setting the maximum extension length to 4~5 cm can cover the conventional anatomical distance from the anterior nasal skin edge to the frontal sinus, maxillary sinus, and sphenoid sinus, adapting to the drug administration needs of patients after different sinus surgeries.

[0013] In a preferred embodiment of the present invention, the lower end of the adjusting tube is provided with a cap connecting portion, which is used to rotate and slide with the cap of the nasal spray. Through the adaptive design of the cap connecting portion, the adjusting tube can form a rotatable and axially slidable connection with the cap of an existing nasal spray. While maintaining the assembly relationship with the bottle body, the adjusting tube is allowed to rotate relative to the cap to adjust the spray direction, and is allowed to slide axially relative to the bottle body when pressed to trigger the pump spray action.

[0014] In a preferred embodiment of the present invention, the connector is used for detachable connection with the connecting tube or pressure head of the nasal spray. This detachable connection structure allows the nozzle to be quickly replaced with nasal sprays of different sizes, facilitating the replacement of specialized nozzles according to individual patient conditions or different treatment stages, thus improving the versatility and economy of the device.

[0015] In a preferred embodiment of the present invention, the limiting cone tube is a boss obtained by rotating a parabola along its axis of symmetry, with its large end facing the adjusting tube and its small end facing the nozzle. Through the parabolic rotational surface design, the outer surface of the limiting cone tube has a higher degree of fit with the outer edge of the nostril, which can disperse contact pressure, reduce local pressure, and improve patient comfort during use, while maintaining effective limitation on the insertion depth of the extension tube.

[0016] This invention also provides a nasal spray device, including the nasal spray nozzle described in any of the above claims, and a bottle body for storing medication. The connector is detachably connected to the pump body or pressure head of the bottle body. By combining a replaceable, steerable nasal spray nozzle with the bottle body and pump body of an existing nasal sprayer, this device achieves dual adjustment of nozzle depth and direction while retaining the original pump body spray function, making it suitable for precise drug delivery to different anatomical areas after sinus surgery.

[0017] Compared with the prior art, the present invention has the following beneficial effects: This invention achieves independent adjustment of the spray direction and nozzle insertion depth through the coordinated operation of the angled nozzle at the front end of the extension tube, the adjusting tube, the limiting cone tube, and the driving tube. Rotating the adjusting tube changes the angle between the nozzle spray direction and the length direction of the pressure plate, allowing the nozzle to be aligned with the openings of the frontal sinus, maxillary sinus, sphenoid sinus, etc., at different anatomical locations. Rotating the driving tube, through the transmission of the spiral groove and sliding pin, drives the limiting cone tube to move axially along the extension tube, thereby precisely controlling the extension length of the extension tube and positioning the nozzle in the target area deep within the nasal cavity. This combination overcomes the shortcomings of traditional nasal spray nozzles, such as limited direction and length, uneven drug distribution, dose attenuation, and positional limitations. It allows patients to conveniently, quickly, and accurately receive medication in any position, helping to shorten the postoperative mucosal epithelialization process of sinus surgery and reducing the patient's disease and economic burden. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a front view structural schematic diagram of the nasal spray nozzle of the present invention; Figure 2 yes Figure 1 The diagram shows a top view of the nasal spray nozzle. Figure 3 yes Figure 1 A three-dimensional structural diagram of the nasal spray nozzle shown; Figure 4 yes Figure 1 Schematic diagram of the AA section structure; Figure 5 This is a front view schematic diagram of the regulating tube in the nasal spray nozzle of the present invention; Figure 6 This is a front view schematic diagram of the limiting cone tube in the nasal spray nozzle of the present invention; Figure 7 This is a cross-sectional view of the drive tube in the nasal spray nozzle of the present invention; Figure 8 These are endoscopic images of the nasal cavity after different surgical procedures and anatomical structures following sinus surgery. Image a is an endoscopic image of the nasal cavity after Draf type I surgery, with the triangular area marking the location of the recurrent polyp in the frontal recess; Image b is an endoscopic image of the nasal cavity after Draf type II surgery, with the triangular area marking the location of the recurrent polyp in the frontal recess, frontal sinus, and ethmoid roof; Image c is an endoscopic image of the nasal cavity showing the location of the maxillary sinus ostium, which is located laterally; Image d is an endoscopic image of the nasal cavity after Draf type III surgery, with the triangular area marking the open frontal sinus cavity and the asterisk marking the residual septum.

[0020] In the above figures, the component names corresponding to each reference numeral are as follows: 100 Extension tube, 110 Insertion part, 120 Nozzle, 130 Scale line, 200 Adjustment tube, 210 Bottle cap connection part, 220 Guide groove, 230 Pressure plate, 300 Limiting cone tube, 310 Sliding pin, 400 Drive tube, 410 Spiral groove rail, 500 Bottle cap. Detailed Implementation

[0021] The following description, in conjunction with the accompanying drawings and a specific embodiment, will be provided.

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0025] Reference Figures 1 to 4The present invention provides a nasal spray nozzle, which is a replaceable component for detachable connection with the pump body connecting tube or pressure head of an existing nasal sprayer (such as the nasal spray device disclosed in CN 217391328U) to achieve precise drug delivery to the deep nasal cavity and different sinus openings.

[0026] The nasal spray nozzle includes an extension tube 100. The extension tube 100 is a slender, hollow tubular structure, integrally molded from medical-grade polypropylene (PP) or high-density polyethylene (HDPE), exhibiting good chemical stability and biocompatibility. A connector 110 is directly formed or fixedly connected to the lower end of the extension tube 100. The connector 110 is used for detachable connection to the pump body connecting tube or pressure head of the nasal spray, and the connection method can be a flexible tight fit, threaded connection, or snap-fit ​​connection. When the connector 110 is inserted into the pump body connecting tube or pressure head, the internal channel of the extension tube 100 communicates with the pump body's liquid channel, and the circumferential position of the extension tube 100 is constrained by the pump body structure, maintaining relative axial and circumferential fixation during use.

[0027] The front end (upper end) of the extension tube 100 is closed, and a nozzle 120 is provided on the side wall. The nozzle 120 has precision atomizing channels inside, allowing the liquid medication to be sprayed out in the form of micro-droplet mist. The spray direction of the nozzle 120 forms an acute angle with the length direction (i.e., the axial direction) of the extension tube 100, preferably between 30° and 60°, for example, 45°. This inclined design allows the spray direction to be obliquely aimed at the nasal cavity side wall, nasal roof, or sinus opening after the nozzle is inserted into the nasal cavity, rather than directly hitting the nasal septum or nasal floor, thereby achieving precise medication delivery to different anatomical locations such as the frontal sinus, maxillary sinus, and sphenoid sinus.

[0028] Reference Figure 1 , Figure 4 and Figure 5 The adjusting tube 200 is fitted onto the lower end of the extension tube 100. The adjusting tube 200 and the extension tube 100 are axially limited by an axial limiting structure (e.g., an annular boss on the outer wall of the extension tube 100 and a corresponding groove on the inner wall of the adjusting tube 200), preventing relative vertical movement between them; simultaneously, this fitting structure allows relative rotation in the circumferential direction. That is, the adjusting tube 200 and the extension tube 100 are axially limited and circumferentially rotating. Two guide grooves 220 are provided on the wall of the adjusting tube 200, symmetrically located on both sides of the adjusting tube 200 and extending along the length (axial direction) of the adjusting tube 200. The guide grooves 220 are through grooves penetrating the wall of the adjusting tube 200, and their width is adapted to the diameter of the sliding pin 310.

[0029] An elongated pressure plate 230 is fixedly mounted on the outer wall of the regulating tube 200. The pressure plate 230 is an elliptical or rectangular plate, with its length significantly greater than its width, and its length is fixedly aligned with the axis of the regulating tube 200. The pressure plate 230 and the regulating tube 200 can be integrally formed. The pressure plate 230 serves as the operating part for user finger pressure; its elongated design allows the user to adjust their grip according to the target sinus location, ensuring that the finger pressure direction is consistent with the intended spray direction.

[0030] The angle adjustment works as follows: Since the extension tube 100 is connected to the connecting tube or pressure head of the nasal spray pump body via the insertion part 110, and the pump body and its connecting tube / pressure head are usually circumferentially constrained by the bottle body or cap, the extension tube 100 remains circumferentially fixed during use. When the user pinches and rotates the pressure plate 230 with their fingers, the adjustment tube 200 rotates relative to the extension tube 100 around a common axis. Since the nozzle 120 is fixed to the front end of the extension tube 100, its spray direction remains fixed relative to the axis of the extension tube 100; while the pressure plate 230 rotates with the adjustment tube 200, the angle between the length direction of the pressure plate 230 and the spray direction of the nozzle 120 changes continuously. Through this relative rotation, the user can adjust the pressure plate 230 to a comfortable angle for pressing according to the anatomical location of the target sinus, while ensuring that the spray direction of the nozzle 120 is precisely aligned with the opening of the frontal sinus, maxillary sinus, or sphenoid sinus. For example, when it is necessary to spray medication on the frontal sinus, the pressure plate 230 is rotated to a position where the thumb can press upwards, at which point the oblique outlet of the nozzle 120 is precisely aligned with the frontal recess or frontal sinus cavity; when it is necessary to spray medication on the maxillary sinus on the outer side, the pressure plate 230 is rotated to the corresponding position so that the nozzle 120 sprays obliquely outwards.

[0031] Reference Figure 1 , Figure 4 and Figure 6 The limiting cone tube 300 is fitted onto the extension tube 100 and is located between the nozzle 120 and the adjusting tube 200. The limiting cone tube 300 is a boss-shaped structure obtained by rotating a parabola along its axis of symmetry, with its large end facing the adjusting tube 200 and its small end facing the nozzle 120. The maximum outer diameter of the limiting cone tube 300 is larger than the diameter of an adult human nostril (usually greater than 1.5 cm). During use, the outer edge of its large end contacts the outer edge of the nostril (the outer edge of the nasal vestibule), forming a reliable physical stop to prevent the extension tube 100 from being excessively inserted into the nasal cavity and damaging the nasal mucosa or touching the nasal septum.

[0032] The limiting cone 300 has a diameter larger than that of a human nostril and is used to contact the outer edge of the nostril to limit the depth of the extension tube 100 into the nasal cavity. This limiting design not only prevents mechanical damage caused by over-insertion of the extension tube 100, but also provides a repeatable positioning reference for each spray, ensuring that the medication accurately reaches the preset anatomical area.

[0033] The limiting cone tube 300 is a boss obtained by rotating a parabola along its axis of symmetry, with its large end facing the adjusting tube 200 and its small end facing the nozzle 120. Compared with a regular conical surface, this parabolic surface of revolution fits more smoothly with the outer edge of the nostril, effectively dispersing contact stress and avoiding discomfort caused by excessive local pressure, while maintaining reliable limitation on the insertion depth of the extension tube 100.

[0034] Two sliding pins 310 are fixedly provided at the base (bottom of the large end) of the limiting tapered tube 300. The two sliding pins 310 are symmetrically arranged on a diameter line of the horizontal cross-section circle of the limiting tapered tube 300. The sliding pins 310 extend radially outward, pass through the guide groove 220 in sequence, and extend to the outside of the adjusting tube 200. The sliding pins 310 can slide smoothly axially within the guide groove 220, while the guide groove 220 restricts the circumferential displacement of the sliding pins 310.

[0035] Reference Figure 4 and Figure 7 The drive tube 400 is sleeved on the outside of the adjusting tube 200. The drive tube 400 and the adjusting tube 200 are rotatably engaged and axially limited—that is, the drive tube 400 can rotate relative to the adjusting tube 200 around a common axis, but the two are axially fixed, and the drive tube 400 will not slide up and down relative to the adjusting tube 200. This axial limitation can be achieved by providing an annular boss on the outer wall of the adjusting tube 200 and a corresponding groove on the inner wall of the drive tube 400. The inner wall of the drive tube 400 is provided with two spiral grooves 410, which are respectively provided on both sides of the inner wall of the drive tube 400 and are slidably engaged with the outer ends of two sliding pins 310. The spiral grooves 410 are spiral grooves formed in the inner wall of the drive tube 400, and their pitch and direction of rotation are set according to the required adjustment stroke and feel.

[0036] The working principle of depth adjustment is as follows: During use, the extension tube 100 remains axially fixed (i.e., it does not undergo axial displacement relative to the adjustment tube 200 and the bottle body). When the user rotates the drive tube 400, due to the axial limitation between the drive tube 400 and the adjustment tube 200, the drive tube 400 only rotates without axial displacement. The spiral groove 410 on the inner wall of the drive tube 400 engages with the outer end of the sliding pin 310, converting the rotational motion into the linear motion of the sliding pin 310. Since the sliding pin 310 passes through the axially arranged guide groove 220, the sliding pin 310 is constrained to slide linearly only along the guide groove 220, thereby driving the limiting cone tube 300 to move up and down along the axial direction of the extension tube 100. When the limiting cone tube 300 moves towards the nozzle 120 (upwards), the length of the extension tube 100 extending beyond the limiting cone tube 300 decreases, and the effective depth of the nozzle entering the nasal cavity becomes shallower; when the limiting cone tube 300 moves away from the nozzle 120 (downwards), the length of the extension tube 100 extending beyond the limiting cone tube 300 increases, and the effective depth of the nozzle entering the nasal cavity becomes deeper. Through this mechanism, the relative extension length of the extension tube 100 can be precisely adjusted simply by axial sliding of the limiting cone tube 300 without changing the position of the extension tube 100 itself.

[0037] Reference Figure 1 and Figure 3 The extension tube 100 has graduation lines 130 on its wall. These graduation lines 130 are evenly spaced along the length of the extension tube 100, for example, one graduation every 5 mm or 1 cm. The graduation lines 130 indicate the length of the extension tube 100 extending beyond the limiting cone tube 300. As the limiting cone tube 300 moves axially along the extension tube 100, the relative position of the graduation lines 130 and the small end face (or a designated reference surface) of the limiting cone tube 300 changes accordingly, thus visually indicating the current relative extension length of the extension tube 100. The user can adjust the limiting cone tube 300 to the corresponding graduation position according to preoperative measurements or medical instructions, so that the nozzle 120 is precisely positioned in front of the target sinus opening.

[0038] The lower end of the regulating tube 200 is provided with a cap connecting part 210. The cap connecting part 210 is used to rotate and slide with the cap 500 of the nasal sprayer. Specifically, the cap connecting part 210 can be designed as an annular flange or a groove structure, which cooperates with the corresponding structure on the top of the cap 500, so that the regulating tube 200 can rotate freely relative to the cap 500 around its own axis (to achieve angle adjustment), and can also slide axially downward relative to the cap 500 when pressed (to trigger the pump body spray action). At the same time, the cap 500 provides axial upward limiting support for the regulating tube 200 to prevent the regulating tube 200 from coming out of the cap 500.

[0039] When the spray is applied by pressing, due to the axial limitation of the regulating tube 200 and the extension tube 100, when the user presses the pressure plate 230, the regulating tube 200 drives the extension tube 100 and the connector 110 to move downward relative to the bottle cap 500. The connector 110 pushes downward to the pump body connecting tube or pressure head it is connected to, triggering the compression of the spring inside the pump body and the opening of the valve, so that the liquid medicine enters the hollow cavity of the extension tube 100 from the bottle through the pump body, the connecting tube / pressure head, and the connector 110, and is finally atomized and sprayed out by the nozzle 120. After the spraying is completed, under the action of the pump body spring return force, the connector 110, the extension tube 100, and the regulating tube 200 return to their original upward position, ready for the next spray.

[0040] In this embodiment, the diameter of the extension tube 100 is preferably 2.5~3.5mm, for example, 3mm. This size ensures smooth passage of the medication and allows it to easily enter the narrow area of ​​the adult nasal cavity. The maximum extension length of the extension tube 100 relative to the limiting cone tube 300 is preferably 4~5cm. This length range covers the anatomical distance from the anterior nasal cavity to the openings of each sinus in most adult patients (approximately 4.2~6.0cm from the anterior nasal cavity skin edge to the maxillary sinus, approximately 4.3~6.9cm to the frontal sinus, and approximately 6~6.5cm to the sphenoid sinus), which satisfies the depth requirements for medication administration to the frontal, maxillary, and sphenoid sinuses while avoiding the increased risk of nasal cavity damage due to excessively long extension tubes.

[0041] The present invention also provides a nasal spray device, which includes the nasal spray nozzle described in any of the above embodiments, and further includes a bottle for storing the medicine and a pump body. The bottle may be made of high-density polyethylene or polypropylene. The plug-in portion 110 is detachably connected to the connecting pipe or pressure head of the pump body. In use, place the medicine bottle containing the liquid medicine into the bottle body; insert the connector 110 into the connecting tube or pressure head of the pump body; according to the target sinus location, first rotate the drive tube 400 to adjust the position of the limiting cone tube 300 to set the relative extension length of the extension tube 100, and confirm the depth by observing the scale line 130; then rotate the pressure plate 230 (i.e., rotate the adjustment tube 200) to adjust the angle between the direction of the nozzle 120 and the length direction of the pressure plate 230; insert the front end of the extension tube 100 into the nostril until the large end of the limiting cone tube 300 contacts the outer edge of the nostril; press the pressure plate 230, and the adjustment tube 200 drives the extension tube 100 and the connector 110 to move downward relative to the bottle cap 500, triggering the pump body. The liquid medicine enters the extension tube 100 through the pump body, connecting tube / pressure head, and connector 110, and is atomized and sprayed out by the nozzle 120 to accurately cover the target sinus area.

[0042] The following combination Figure 8 Examples of different surgical procedures after sinus surgery.

[0043] Reference Figure 8For patients who have undergone Draf type I surgery, polyps are prone to recurrence in the frontal recess area (as shown in ▲ in the figure). The limiting cone tube 300 can be adjusted so that the relative extension length of the extension tube 100 is about 4.3~5.0cm, and the adjusting tube 200 can be rotated so that the nozzle 120 is angled upward and aimed at the frontal recess to achieve precise drug delivery.

[0044] Reference Figure 8 For patients who have undergone Draf type II surgery, the frontal sinus and ethmoid region (as shown in ▲ in the figure) need to be covered. The relative extension length of the extension tube 100 can be adjusted to about 5.0~6.0cm, and the nozzle 120 can be adjusted to be angled upward and outward.

[0045] Reference Figure 8 For patients whose maxillary sinus ostium is located on the outer side, the nozzle 120 direction can be adjusted to be obliquely outward, and with an appropriate extension length, the medication can reach the maxillary sinus ostium (as shown in ▲ in the figure).

[0046] Reference Figure 8 In the middle section, for the nasal cavity after Draf III surgery, the open frontal sinus cavity is relatively large (as shown by ▲ in the figure). The relative extension length of the extension tube 100 can be adjusted to the maximum (e.g., 4~5cm), and the nozzle 120 can be adjusted to align with the middle of the frontal sinus cavity. At the same time, the residual septum (as shown by * in the figure) can be used as a directional reference.

[0047] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0049] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0050] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0051] The above are merely preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be considered as limitations on the present invention, and the scope of protection of the present invention should be determined by the scope defined in the claims. For those skilled in the art, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A nasal spray nozzle, characterized in that, include: An extension tube, the lower end of which has a connector for connecting to a nasal spray tube or pressure head, and the front end of which has a nozzle, the spray direction of which forms an acute angle with the length direction of the extension tube. An adjusting tube is sleeved on the lower end of the extension tube and is axially limited and circumferentially rotated with the extension tube. The wall of the adjusting tube is provided with an axial guide groove, and the outer wall of the adjusting tube is provided with a long strip-shaped pressure plate. A limiting cone tube is sleeved on the extension tube and located between the nozzle and the adjusting tube. The base of the limiting cone tube is provided with a sliding pin, which passes through the guide groove. A drive tube is sleeved outside the adjustment tube and rotates with the adjustment tube while being axially limited. The inner wall of the drive tube is provided with a spiral groove, and the sliding pin slides with the spiral groove. Rotating the adjusting tube can adjust the angle between the spray direction of the nozzle and the length direction of the pressure plate; rotating the driving tube can drive the limiting cone tube to move axially along the extension tube to adjust the length of the extension tube extending out of the limiting cone tube.

2. The nasal spray nozzle according to claim 1, characterized in that, The diameter of the limiting cone tube is larger than the diameter of the human nostril, and it is used to contact the outer edge of the nostril to limit the depth of the extension tube into the nasal cavity.

3. The nasal spray nozzle according to claim 1, characterized in that, The extension tube has scale lines on its wall, which are used to indicate the length by which the extension tube extends beyond the limiting cone tube.

4. The nasal spray nozzle according to claim 1, characterized in that, There are two sliding pins, which are symmetrically arranged on a diameter line of the horizontal cross-section circle of the limiting cone tube; there are two spiral grooves, which are correspondingly arranged on the inner wall of the drive tube.

5. The nasal spray nozzle according to claim 1, characterized in that, The pressure plate is an elliptical plate or a rectangular plate.

6. The nasal spray nozzle according to claim 1, characterized in that, The diameter of the extension tube is 2.5~3.5mm, and / or the maximum extension length of the extension tube relative to the limiting cone tube is 4~5cm.

7. The nasal spray nozzle according to claim 1, characterized in that, The lower end of the regulating tube is provided with a cap connection part, which is used to rotate and slide with the cap of the nasal spray.

8. The nasal spray nozzle according to claim 1, characterized in that, The connector is used for detachable connection with the connecting tube or pressure head of the nasal sprayer.

9. The nasal spray nozzle according to claim 1, characterized in that, The limiting cone tube is a boss obtained by rotating a parabola along the axis of symmetry, with its large end facing the adjusting tube and its small end facing the nozzle.

10. A nasal spray device comprising the nasal spray nozzle according to any one of claims 1-9, characterized in that, It also includes a bottle body for storing liquid medicine, and the plug-in part is detachably connected to the connecting pipe or pressure head of the pump body.

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