Nasal cavity surface anesthesia dosing device

Abstract

The utility model provides a nasal cavity surface anesthesia dosing device. The nasal cavity surface anesthesia dosing device comprises a dosing hose and a spray bottle, the dosing hose comprises a main catheter, a medicine spraying connector, a suction side tube and a suction connector, the medicine spraying connector is fixedly connected to the rear end of the main catheter, the suction side tube is fixedly connected to the side portion of the rear end of the main catheter, and the suction connector is fixedly connected to the rear end of the suction side tube; a plurality of administration holes communicated with a tube cavity of the main body catheter are formed in the preset length of the front section of the main body catheter, at least one suction channel communicated with a tube cavity of the suction side tube is arranged in the tube wall of the main body catheter, the suction channel extends out of the front end of the main body catheter, and the suction side tube and a negative pressure suction device are detachably installed through a suction connector. The soft dosing hose can conveniently extend to the deep part of the nasal cavity and near the posterior nostril along the bent nasal meatus, so that medicine can be conveniently sprayed to the whole nasal cavity. The suction side tube can perform negative pressure suction cleaning on snot in the nasal cavity in advance, so that subsequent nasal cavity surface anesthesia administration operation is facilitated, and the anesthesia effect is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of local anesthesia equipment technology, specifically to a spray-type drug delivery device for nasal surface anesthesia. Background Technology

[0002] Before performing nasal endotracheal intubation, bronchoscopy, laryngoscopy, or nasopharyngoscopy, topical anesthesia of the nasal cavity is required to reduce pain or discomfort and nasal mucosal bleeding during the examination and treatment.

[0003] Currently, long cotton swabs soaked in local anesthetic drugs are commonly used in clinical practice and inserted deep into the nasal cavity and near the posterior nasal openings to anesthetize the nasal mucosa. However, using long cotton swabs has the following disadvantages: the drug-carrying capacity of the swab is limited, and the anesthetic effect cannot be guaranteed; the rigid cotton swab stick is uncomfortable for the patient when inserted into the curved nasal passage, and it is easy to cause damage and bleeding to the nasal mucosa; at the same time, when there is nasal discharge, the discharge will adhere to the cotton part of the swab, preventing the local anesthetic drug from fully contacting the nasal mucosa, resulting in poor anesthetic effect. Therefore, there is an urgent need for a new type of surface anesthesia drug delivery device to solve the above problems. Utility Model Content

[0004] To address the problems mentioned in the background section, this invention provides a novel nasal surface anesthesia delivery device using a spray delivery method. This device can be inserted into the deep part of the nasal cavity and near the posterior nasal opening via a flexible tube to spray medication throughout the entire nasal cavity. Most importantly, it can pre-clean the nasal cavity by using a suction tube integrated on the flexible tube to perform negative pressure suction of nasal mucus, facilitating subsequent nasal surface anesthesia delivery and ensuring the anesthetic effect.

[0005] This utility model adopts the following technical solution: a nasal surface anesthesia drug delivery device, including a drug delivery hose and a spray bottle; the drug delivery hose includes a main tube, a spray connector, a suction side tube, and a suction connector, the spray connector is fixedly connected to the rear end of the main tube, the suction side tube is fixedly connected to the rear side of the main tube, and the suction connector is fixedly connected to the rear end of the suction side tube; the drug delivery hose is detachably installed on the spray head of the spray bottle through the spray connector;

[0006] Multiple drug delivery holes communicating with the lumen of the main catheter are provided along a predetermined length of the front section of the main catheter. At least one suction channel communicating with the lumen of the suction side tube is provided inside the wall of the main catheter. The suction channel extends out of the front end of the main catheter. The suction side tube is detachably installed with a negative pressure suction device through a suction connector.

[0007] Furthermore, multiple drug delivery ports are arranged in an axial and / or circumferential array along the main catheter; when there are two or more suction channels, they are arranged in a circumferential array along the main catheter; the drug delivery ports and suction channels are staggered.

[0008] Furthermore, the suction connector is a positive pressure connector, a conical tube, or a circular tube; the negative pressure suction device is a syringe, a negative pressure balloon, or a negative pressure drainage bottle.

[0009] Furthermore, the main conduit has a length of 10cm, an outer diameter of 0.5cm, and a predetermined length of 7cm.

[0010] Furthermore, the front end of the main conduit is a circular tip.

[0011] Furthermore, the spray bottle includes a bottle body, a bottle cap, a pressurizing assembly, and a control valve assembly; the bottle cap includes a cap body covering the bottle mouth of the bottle body, and the pressurizing assembly is fixedly installed on the cap body, with one end extending into the bottle body for pressurizing the bottle body;

[0012] The control valve assembly includes a valve body, a valve core, a suction tube, a connecting connector, an atomizing nozzle, and a pressing handle. The valve body is fixedly installed on the top of the cap, the connecting connector is fixedly installed on the side of the valve body, the atomizing nozzle is fixedly installed inside the connecting connector, one end of the suction tube is fixedly connected to the valve body, and the other end extends towards the bottom of the bottle. A liquid passage chamber communicating with the suction tube, the atomizing nozzle, and the connecting connector is provided in the valve body. The valve core is installed in the valve body, and the pressing handle is hinged to the top of the cap. One end of the valve core extends out of the valve body and is connected to the pressing handle. The pressing handle can drive the valve core to move, thereby achieving the closing and opening of the liquid passage chamber.

[0013] Furthermore, the valve core includes a telescopic shaft, a sealing block, and a spring. The inner diameter of the liquid passage chamber is larger than the outer diameter of the telescopic shaft. The telescopic shaft is installed in the valve body, with its front end inside the liquid passage chamber and its rear end extending out of the valve body and connected to the pressing handle. A mounting plate with a diameter larger than the telescopic shaft is fixedly installed at the front end of the telescopic shaft. The sealing block is fixedly installed on the front end face of the mounting plate and is used to seal the inner cavity of the connecting joint. The spring is sleeved on the outside of the telescopic shaft, with its two ends abutting against the mounting plate and the end wall of the liquid passage chamber, respectively.

[0014] Furthermore, the spray nozzle is a tapered tube, and the connecting joint is a pagoda joint. The pagoda joint includes multiple tapered snap-fit ​​parts arranged in a stepped manner, and the taper of the multiple tapered snap-fit ​​parts gradually increases from the outside to the inside. The drug delivery tubing is detachably and sealingly connected to the tapered snap-fit ​​parts of the pagoda joint through the tapered tube.

[0015] Furthermore, the pressurizing assembly includes a pressurizing cylinder, a pressurizing rod, and a piston; the pressurizing cylinder is fixedly installed inside the cap, with its bottom end extending into the bottle body; the piston is installed inside the pressurizing cylinder; one end of the pressurizing rod is fixedly connected to the piston, and the other end protrudes through a through hole provided on the cap body; at least one first channel and at least one second channel are respectively provided on the bottom plate of the pressurizing cylinder and the bottom plate of the piston; rubber sheets are fixedly installed on the bottom end face of the pressurizing cylinder and the bottom end face of the piston respectively by fasteners, and the rubber sheets cover the first channel and the second channel.

[0016] Furthermore, the fastener is a screw or a rivet.

[0017] Beneficial effects: The flexible drug delivery tube facilitates its extension along the curved nasal passages to the depths of the nasal cavity and near the posterior nasal openings, while preventing damage and bleeding to the nasal mucosa, thus increasing patient comfort. Multiple delivery holes are evenly distributed at the tip of the tube, allowing for full nasal spraying after administration via a spray bottle, ensuring effective anesthesia. Most importantly, the suction side tube integrated into the drug delivery tube allows for pre-treatment negative pressure suction to clear nasal mucus, providing convenient operation and effective cleaning, facilitating subsequent administration of nasal surface anesthesia and further guaranteeing the anesthetic effect. Attached Figure Description

[0018] Appendix Figure 1 This is a three-dimensional structural schematic diagram of the nasal surface anesthesia delivery device of this utility model.

[0019] Appendix Figure 2 This is a schematic diagram of the structure of the drug delivery tube in this utility model.

[0020] Appendix Figure 3 This is a schematic diagram of the cross-sectional structure of the main conduit 11 in this utility model.

[0021] Appendix Figure 4 This is a schematic diagram of the structure of the spray bottle 2 in this utility model.

[0022] Appendix Figure 5 This is a cross-sectional structural diagram of the spray bottle 2 in this utility model.

[0023] Appendix Figure 6 This is an appendix to the utility model Figure 5 A magnified structural diagram of part A in the middle.

[0024] Appendix Figure 7 This is an appendix to the utility model Figure 5 A magnified structural diagram of part B.

[0025] The reference numerals in the attached drawings are explained as follows: 1. Dosing tubing; 11. Main conduit; 111. Dosing port; 112. Suction channel; 113. Lumen; 12. Spray connector; 13. Suction side tube; 14. Suction connector; 2. Spray bottle; 21. Bottle body; 22. Bottle cap; 221. Cap body; 222. Valve body; 223. Suction tube; 224. Connecting connector; 225. Atomizing nozzle; 226. Pressurizing cylinder; 227. First channel; 228. Rubber sheet; 229. Fixing element; 2210. Pressurizing rod; 2211. Piston; 2211. Second channel; 2212. Press handle; 2213. Liquid passage chamber; 2214. Telescopic shaft; 2215. Sealing block; 2216. Spring; 2217. Detailed Implementation

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The content of the utility model will be further explained below in conjunction with the drawings:

[0027] Example 1

[0028] Refer to the instruction manual appendix Figure 1 A nasal surface anesthesia delivery device includes a delivery tubing 1 and a spray bottle 2.

[0029] Refer to the instruction manual appendix Figure 2 The drug delivery tubing 1 includes a main catheter 11, a spray connector 12, a suction side tube 13, and a suction connector 14. The main catheter 11 is a catheter that extends into the nasal cavity and is made of a soft material, such as polyurethane or silicone. It is 10 cm long and has an outer diameter of 0.5 cm. The front end of the main catheter 11 is rounded, which can prevent damage to the nasal mucosa to a certain extent when inserted along the nasal passage.

[0030] The spray connector 12 is fixedly connected to the rear end of the main conduit 11 and is used to connect to the spray head of the spray bottle 2. The suction side tube 13 is fixedly connected to the rear side of the main conduit 11. The suction connector 14 is fixedly connected to the rear end of the suction side tube 13. The suction side tube 13 is detachably installed with the negative pressure aspirator through the suction connector 14. The suction connector 14 is a positive pressure connector, a conical tube, or a circular tube. The negative pressure aspirator is a syringe, a negative pressure balloon, or a negative pressure drainage bottle.

[0031] Refer to the instruction manual appendix Figure 2 , 3Multiple drug delivery holes 111 communicating with the lumen 113 of the main conduit 11 are provided in a 7cm length region at the front end of the main conduit 11. Four drug delivery holes 111 are arranged as a group, and a group of drug delivery holes 111 is evenly distributed around the main conduit 11. Multiple groups of drug delivery holes 111 are arranged along the axial direction of the main conduit 11. Four suction channels 112 communicating with the lumen of the suction side tube 13 are provided inside the wall of the main conduit 11. The four suction channels 112 are evenly distributed around the main conduit 11, and the suction channels 112 extend out of the circular end of the front end of the main conduit 11.

[0032] See attached document Figure 3 The administration port 111 and the suction channel 112 are arranged in a staggered manner. The staggered arrangement means that the administration port 111 and the suction channel 112 are set in different positions and are independent of each other. That is, the administration port 111 and the suction channel 112 are not connected in the main conduit 11. The administration port 111 is set in the area between two adjacent suction channels 112.

[0033] When cleaning nasal mucus, the negative pressure suction device is connected to the suction connector 14 and slowly inserted into the drug delivery tube 1 along the nasal passage. The negative pressure generated by the negative pressure suction device passes through the suction side tube and the suction channel 112 in sequence and is transmitted to the front end of the main catheter 11. The nasal mucus is subjected to negative pressure and is drawn into the suction channel 112, the suction side tube and the negative pressure suction device, thus achieving negative pressure cleaning of nasal mucus. This operation can be repeated to achieve the best nasal mucus cleaning effect.

[0034] In order to ensure that the local anesthetic drug in the spray bottle 2 can be sprayed out smoothly without having to press it repeatedly during use, thus making it convenient to operate, the spray bottle 2 in this patent is a pressurized spray bottle.

[0035] Refer to the instruction manual appendix Figure 4-7 The spray bottle 2 includes a bottle body 21, a bottle cap 22, a pressurization assembly and a control valve assembly; the bottle cap 22 includes a cap 221 that covers the mouth of the bottle body 21.

[0036] The pressurization assembly includes a pressurization cylinder 226, a pressurization rod 2210, and a piston 2211. The pressurization cylinder 226 is fixedly installed inside the cap 221, with its bottom end extending into the bottle 21. The piston 2211 is installed inside the pressurization cylinder 226. One end of the pressurization rod 2210 is fixedly connected to the piston 2211, and the other end passes through a through hole provided on the cap 221. The diameter of the through hole is larger than the outer diameter of the pressurization rod 2210, allowing air to enter the pressurization cylinder 226 through the through hole.

[0037] Four first channels 227 and second channels 2212 are respectively provided on the bottom plate of the pressure cylinder 226 and the piston 2211. Rubber sheets 228 are fixedly installed on the bottom end face of the pressure cylinder 226 and the bottom end face of the piston 2211 by fasteners 229. The fasteners 229 are screws or rivets. The rubber sheets 228 cover the first channels 227 and the second channels 2212.

[0038] When pressurizing the bottle 21, the pressurizing rod 2210 is first lifted, creating a negative pressure inside the pressurizing cylinder 226 at the bottom of the piston 2211. This causes the rubber sheet 228 on the bottom surface of the pressurizing cylinder 226 to adhere tightly to the bottom surface of the pressurizing cylinder 226, sealing the first channel 227. At this time, external air enters the pressurizing cylinder 226 at the bottom of the piston 2211 through the through hole, the inner cavity of the pressurizing cylinder 226 at the top of the piston 2211, and the second channel 2212. Then, the pressurizing rod 2210 is lifted. When the pressure rod 2210 is pressed down, pressure is generated in the inner cavity of the pressure cylinder 226 at the bottom of the piston 2211, causing the rubber sheet 228 on the piston 2211 to press tightly against the piston 2211, thus sealing the second channel 2212. Meanwhile, the air pressure pushes open the rubber sheet 228 at the bottom end of the pressure cylinder 226, allowing air to enter the bottle 21 through the first channel 227. By repeating the above operation, the bottle 21 can be pressurized. The more times it is repeated, the greater the pressure inside the bottle 21 becomes.

[0039] The control valve assembly includes a valve body 222, a suction tube 223, a connecting connector 224, an atomizing nozzle 225, a pressing handle 2213, a telescopic shaft 2215, a sealing block 2216, and a spring 2217. The valve body 222 is fixedly installed on the top of the cap 221, the connecting connector 224 is fixedly installed on the side of the valve body 222, and the atomizing nozzle 225 is fixedly installed inside the connecting connector 224 for atomizing and spraying local anesthetic drugs. One end of the suction tube 223 is fixedly connected to the valve body 222, and the other end extends to the bottom of the bottle 21. A filter is provided at the other end of the suction tube 223 to filter the local anesthetic drugs and prevent the atomizing nozzle 225 from clogging. At the same time, the weight of the filter also ensures that the other end of the suction tube 223 is always at the bottom of the bottle 21, which facilitates the discharge of local anesthetic drugs from the bottom of the bottle 21.

[0040] The pressing handle 2213 is hinged to the top of the cover 221. A liquid passage chamber 2214 is provided inside the valve body 222, which is connected to the suction tube 223, the atomizing nozzle 225 and the connecting joint 224. The inner diameter of the liquid passage chamber 2214 is larger than the outer diameter of the telescopic shaft 2215. The telescopic shaft 2215 is installed inside the valve body 222, with its front end inside the liquid passage chamber 2214 and its rear end extending out of the valve body 222 and connected to the pressing handle 2213. A sealing ring is provided between the end of the telescopic shaft 2215 extending out of the valve body 222 and the valve body 222 to prevent leakage of local anesthetic drugs entering the liquid passage chamber 2214.

[0041] Specifically, a slot is provided at the position where the pressing handle 2213 is opposite to the telescopic shaft 2215. The rear end of the telescopic shaft 2215 passes through the slot, and a baffle with a specification larger than the slot is provided at the rear end of the telescopic shaft 2215. When the pressing handle 2213 is pressed, the baffle abuts against the pressing handle 2213 to drive the telescopic shaft 2215 to move backward.

[0042] A mounting plate with a diameter larger than that of the telescopic shaft 2215 is fixedly installed at the front end of the telescopic shaft 2215. The mounting plate is located inside the liquid passage chamber 2214 and can move back and forth along the liquid passage chamber 2214. A sealing block 2216 is fixedly installed on the front end face of the mounting plate. The sealing block 2216 is made of rubber material. A spring 2217 is fitted outside the telescopic shaft 2215 and is located inside the liquid passage chamber 2214. Its two ends abut against the mounting plate and the end wall of the liquid passage chamber 2214, respectively.

[0043] The spring 2217 is initially in a stretched state, pushing the mounting plate and sealing block 2216 towards the connecting joint 224, and causing the sealing block 2216 to seal the inner cavity of the connecting joint 224. At this time, the spray bottle 2 is not spraying. When the spray bottle 2 needs to spray, pressing the pressing handle 2213 drives the telescopic shaft 2215 to move backward. At this time, the mounting plate and sealing block 2216 move backward synchronously, connecting the inner cavity of the connecting joint 224 with the liquid passage chamber 2214. Under pressure, the local anesthetic drug passes sequentially through the suction tube 223, the liquid passage chamber 2214, and the inner cavity of the connecting joint 224, and is atomized by the atomizing nozzle 225 before being sprayed out from the connecting joint 224. When the pressing handle 2213 is released, the spring 2217 rebounds, pushing the mounting plate and sealing block 2216 back towards the connecting joint 224, sealing the inner cavity of the connecting joint 224.

[0044] The spray connector 12 is a tapered tube, and the connecting connector 224 is a pagoda connector. The pagoda connector includes multiple tapered snap-fit ​​parts arranged in a stepped manner, and the taper of the multiple tapered snap-fit ​​parts gradually increases from the outside to the inside. The drug delivery hose 1 is detachably and sealed to the tapered snap-fit ​​parts of the pagoda connector through the tapered tube, which facilitates the replacement of the drug delivery hose 1, while the spray bottle 2 can be reused.

[0045] One method of using the nasal surface anesthesia delivery device in this patent includes: when performing nasal surface anesthesia on a patient, medical personnel first assess whether there is nasal discharge in the patient's nasal cavity.

[0046] If there is no nasal discharge, slowly insert the administration tube 1 along the nasal passage, ensuring the tip of the administration tube 1 reaches deep into the nasal cavity and near the posterior nasal opening. Pressurize the spray bottle 2 by repeatedly lifting and pressing the pressure lever 2210. Finally, connect the spray connector 12 to the connecting connector 224 and press the handle 2213 to spray the local anesthetic in the spray bottle 2 from the connecting connector 224 into the administration tube 1, and finally spray it out from the administration port 111 on the administration tube 1 to anesthetize the nasal mucosa. After the nasal surface anesthesia operation is completed, release the handle 2213 to stop the spray bottle 2 from spraying medication. Separate the spray bottle 2 from the administration tube 1, pull out the administration tube 1, and discard it into the medical waste bin.

[0047] If there is nasal discharge, first connect the negative pressure aspirator to the suction connector 14 so that the negative pressure aspirator continuously generates negative pressure, and slowly insert the drug delivery tubing 1 along the nasal passage. During the insertion process, the nasal discharge will be drawn by the negative pressure of the suction channel 112 at the front end of the drug delivery tubing 1 and will be drawn into the suction channel 112, the suction side tube and the negative pressure aspirator. The suction operation can be repeated until the nasal discharge is cleared.

[0048] The surface of the administration tube 1 is sterilely wiped clean to prevent nasal mucus residue. Then, the administration tube 1 is slowly inserted into the nasal passage, ensuring that the tip of the administration tube 1 reaches deep into the nasal cavity and near the posterior nasal opening. The spray bottle 2 is pressurized by repeatedly lifting and pressing the pressure lever 2210. Finally, the spray connector 12 is connected to the connecting connector 224, and the pressing handle 2213 is pressed to spray the local anesthetic in the spray bottle 2 from the connecting connector 224 into the administration tube 1. The anesthetic is then sprayed out from the administration port 111 on the administration tube 1 to anesthetize the nasal mucosa. After the nasal surface anesthesia operation is completed, the pressing handle 2213 is released, the spray bottle 2 stops spraying, the spray bottle 2 is separated from the administration tube 1, and the administration tube 1 is pulled out and discarded into the medical waste bin.

[0049] Obviously, modifications and / or additions can be made to the above-described nasal surface anesthesia delivery device and corresponding method without departing from the scope and range of this utility model.

[0050] It is equally clear that, although the present invention has described the nasal surface anesthesia delivery device in detail, those skilled in the art will certainly be able to obtain many other equivalent forms of nasal surface anesthesia delivery devices and corresponding methods that have the features described in the claims and are therefore within the scope of protection defined herein.

Claims

1. A nasal topical anesthetic delivery device, characterized by: The device includes a drug delivery hose (1) and a spray bottle (2); the drug delivery hose (1) includes a main conduit (11), a spray connector (12), a suction side tube (13), and a suction connector (14). The spray connector (12) is fixedly connected to the rear end of the main conduit (11), the suction side tube (13) is fixedly connected to the rear end side of the main conduit (11), and the suction connector (14) is fixedly connected to the rear end of the suction side tube (13); the drug delivery hose (1) is detachably mounted on the spray head of the spray bottle (2) via the spray connector (12). Multiple drug delivery holes (111) communicating with the lumen (113) of the main catheter (11) are provided at a predetermined length of the front section of the main catheter (11). At least one suction channel (112) communicating with the lumen of the suction side tube (13) is provided inside the wall of the main catheter (11). The suction channel (112) extends out of the front end of the main catheter (11). The suction side tube (13) is detachably installed with the negative pressure suction device through the suction connector (14).

2. The nasal topical anesthetic delivery device of claim 1, wherein: Multiple drug delivery holes (111) are arranged in an axial and / or circumferential array along the main conduit (11); when there are two or more suction channels (112), they are arranged in a circumferential array along the main conduit (11); the drug delivery holes (111) and the suction channels (112) are arranged in a staggered manner.

3. The nasal topical anesthetic delivery device of claim 1, wherein: The suction connector (14) is a positive pressure connector, a conical tube, or a circular tube; the negative pressure suction device is a syringe, a negative pressure balloon, or a negative pressure drainage bottle.

4. The nasal topical anesthetic delivery device of claim 1, wherein: The front end of the main conduit (11) is a circular end.

5. The nasal topical anesthetic delivery device of claim 1, wherein: The main conduit (11) has a length of 10cm and an outer diameter of 0.5cm, and the predetermined length is 7cm.

6. The nasal topical anesthetic delivery device of claim 1, wherein: The spray bottle (2) includes a bottle body (21), a bottle cap (22), a pressurizing component and a control valve component; the bottle cap (22) includes a cap body (221) covering the bottle mouth of the bottle body (21), and the pressurizing component is fixedly installed on the cap body (221), with one end extending into the bottle body (21) for pressurizing the bottle body (21); The control valve assembly includes a valve body (222), a valve core, a suction tube (223), a connecting joint (224), an atomizing nozzle (225), and a pressing handle (2213). The valve body (222) is fixedly installed on the top of the cap (221), the connecting joint (224) is fixedly installed on the side of the valve body (222), the atomizing nozzle (225) is fixedly installed inside the connecting joint (224), and one end of the suction tube (223) is fixedly connected to the valve body (222), while the other end extends into the bottle (213). The bottom end of the valve core extends into the valve body (222), and a liquid passage chamber (2214) is provided inside the valve body (222) and communicates with the suction pipe (223), the atomizing nozzle (225) and the connecting joint (224); the valve core is installed inside the valve body (222), and the pressing handle (2213) is hinged to the top of the cover (221). One end of the valve core extends out of the valve body (222) and is connected to the pressing handle (2213). The pressing handle (2213) can drive the valve core to move so as to realize the closing and opening of the liquid passage chamber (2214).

7. The nasal surface anesthesia delivery device according to claim 6, characterized in that: The valve core includes a telescopic shaft (2215), a sealing block (2216), and a spring (2217). The inner diameter of the liquid passage chamber (2214) is larger than the outer diameter of the telescopic shaft (2215). The telescopic shaft (2215) is installed inside the valve body (222), with its front end inside the liquid passage chamber (2214) and its rear end extending out of the valve body (222) and connected to the pressing handle (2213). A mounting plate with a diameter larger than that of the telescopic shaft (2215) is fixedly installed at the front end of the telescopic shaft (2215). The sealing block (2216) is fixedly installed on the front end face of the mounting plate and is used to seal the inner cavity of the connecting joint (224). The spring (2217) is sleeved outside the telescopic shaft (2215), with its two ends abutting against the mounting plate and the end wall of the liquid passage chamber (2214), respectively.

8. The nasal topical anesthetic delivery device of claim 6, wherein: The spray nozzle (12) is a tapered tube, and the connecting nozzle (224) is a pagoda nozzle. The pagoda nozzle includes multiple tapered snap-fit ​​parts arranged in a stepped manner, and the taper of the multiple tapered snap-fit ​​parts gradually increases from the outside to the inside. The drug delivery tube (1) is detachably and sealed to the tapered snap-fit ​​part of the pagoda nozzle through the tapered tube.

9. The nasal topical anesthetic delivery device of claim 6, wherein: The pressurizing assembly includes a pressurizing cylinder (226), a pressurizing rod (2210), and a piston (2211). The pressurizing cylinder (226) is fixedly installed inside the cap (221), with its bottom end extending into the bottle (21). The piston (2211) is installed inside the pressurizing cylinder (226). One end of the pressurizing rod (2210) is fixedly connected to the piston (2211), and the other end passes through a through hole provided on the cap (221). At least one first channel (227) and at least one second channel (2212) are respectively provided on the bottom plate of the pressurizing cylinder (226) and the piston (2211). Rubber sheets (228) are fixedly installed on the bottom end face of the pressurizing cylinder (226) and the bottom end face of the piston (2211) respectively by fasteners (229). The rubber sheets (228) cover the first channel (227) and the second channel (2212).

10. The nasal topical anesthetic delivery device of claim 9, wherein: The fastener (229) is a screw or a rivet.

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