A device for topical anaesthesia of the upper respiratory tract

Abstract

This invention provides an upper respiratory tract surface anesthesia device, belonging to the technical field of anesthesia devices. Its features include an inlet pipe, a connecting pipe, and a spray nozzle. The lower end of the inlet pipe is connected to the connecting pipe via a flexible tube for connecting to an external drug or air supply line. An adjusting rod is slidably fitted on the outer side of the inlet pipe. The upper end of the inlet pipe has a conical tube, and a movable sleeve rod is movably fitted on the outer side of the conical tube. The spray nozzle is located at the upper end of the conical tube for spraying anesthetic liquid. The upper end of the conical tube has a sealing sleeve, and the inner side of the sealing sleeve has a support rod. The upper end of the adjusting rod has an ear plate, and the inner side of the ear plate is rotatably connected to a connecting rod that is rotatably connected to the movable sleeve rod. This allows the adjusting rod to adjust the angle of the support rod to cooperate with the sealing sleeve in sealing the airway. The advantages of this invention are: effective sealing of the target airway, prevention of drug leakage, significantly improved drug utilization and anesthetic effect, and convenient operation.

Description

Technical Field

[0001] This invention relates to the field of anesthesia devices, and in particular to an upper respiratory tract surface anesthesia device. Background Technology

[0002] In clinical practice, procedures such as awake endotracheal intubation, bronchoscopy, or laryngeal surgery require topical anesthesia of the upper respiratory tract mucosa. Commonly used anesthesia methods include laryngeal spray, cricothyroid membrane puncture and injection, and fiberoptic bronchoscopy-assisted anesthesia.

[0003] In the laryngeal spray method, after exposing the pharynx and larynx with a laryngoscope, a local anesthetic solution is sprayed onto the mucosal surface using a nozzle. However, the droplets produced by this type of device are uneven in size, failing to form a uniform and effective drug coverage in the pharynx, larynx, and glottis. Due to the lack of sealing measures for the target area, the solution is easily diluted by saliva or flows into the esophagus with swallowing, resulting in insufficient local drug concentration, unreliable anesthetic effect, often requiring repeated administration, prolonged operation time, and significant patient discomfort and coughing reactions.

[0004] The cricothyroid membrane puncture injection method involves injecting medication directly into the trachea through a cervical cricothyroid membrane puncture. Although it can quickly anesthetize the subglottic mucosa, it is an invasive procedure with risks such as bleeding at the puncture site, infection, and injury to the vocal cords or tracheal wall. It is also difficult to locate the puncture site, causing additional trauma and fear to the patient, and is not suitable as a routine first-line method.

[0005] Fiberoptic bronchoscopy-assisted anesthesia involves inserting a drug delivery tube through the working channel of a fiberoptic bronchoscope to spray medication onto the glottis and tracheal mucosa under direct vision. This method offers good visibility, but fiberoptic bronchoscopes are expensive, require multiple operators, have a long learning curve, and are difficult to popularize in primary hospitals. Repeated insertion of the scope may also cause adverse nerve reflexes and mucosal damage.

[0006] Based on the above, the existing methods and devices have the following problems: difficulty in airway closure and low drug utilization: the existing spray head has no sealing structure and cannot form an isolation space in the pharynx, resulting in the loss and dilution of anesthetic solution, making it difficult to maintain a stable depth of anesthesia.

[0007] Fixed spray angle and position, poor adaptability: The nozzles of most devices cannot be flexibly adjusted in angle and position according to the individual anatomical differences of the patient's larynx, making it difficult to accurately deliver the medication to the vocal cords and key subglottic areas, often resulting in an anesthetic blank area.

[0008] Insufficient atomization and spray pressure, resulting in excessive irritation: Ordinary nebulizers have low spray pressure and coarse atomized particles, which is not conducive to the uniform adsorption of the medicine on the mucous membrane surface, easily stimulating the cough reflex and affecting patient cooperation.

[0009] Therefore, there is an urgent need for an upper respiratory tract surface anesthesia device that can effectively close the patient's airway and evenly spray the medication to facilitate adsorption, in order to solve the above problems. Summary of the Invention

[0010] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows:

[0011] An upper respiratory tract surface anesthesia device includes an inlet tube, a connecting tube, and a spray nozzle. The lower end of the inlet tube is connected to the connecting tube via a flexible tube. The connecting tube is used to connect to an external drug supply or air supply line. An adjusting rod is slidably fitted on the outer side of the inlet tube. The upper end of the inlet tube has a conical tube. A movable sleeve is movably fitted on the outer side of the conical tube. The spray nozzle is located at the upper end of the conical tube and is used to spray anesthetic liquid. The upper end of the conical tube has a sealing sleeve. The inner side of the sealing sleeve has a support rod. One end of the support rod is rotatably connected to the conical tube. A connecting rod is rotatably connected to the outer side of the movable sleeve and connected to the middle of the support rod. The upper end of the adjusting rod has an ear plate. A connecting rod is rotatably connected to the inner side of the ear plate and rotatably connected to the movable sleeve, which is used to adjust the angle of the support rod to cooperate with the sealing sleeve to seal the airway.

[0012] As an improvement, the air intake pipe is made of medical-grade rigid plastic, and its surface has a guide rail arranged in the axial direction. The inner side wall of the adjusting rod has a sliding groove for sliding fit with the guide rail on the surface of the air intake pipe, which restricts the axial rotation of the adjusting rod and allows for angle adjustment in conjunction with the movable sleeve.

[0013] As an improvement, the upper and lower ends of the intake pipe are equipped with limit protrusions to limit the sliding position of the adjusting rod. One side of the adjusting rod is equipped with a through hole, which is set perpendicular to the axis of the intake pipe. The inner side of the through hole is threaded and connected to a locking bolt. The lower end of the locking bolt is equipped with a rubber anti-slip pad. By tightening the thread, it makes full contact with the intake pipe to increase the friction and limit the movement of the adjusting rod.

[0014] As an improvement, the upper end of the connecting tube is equipped with a handle. The handle is cylindrical and located on the side of the connecting tube away from the liquid inlet. It has a cavity in the middle for hose installation. The outer side of the handle has anti-slip texture for easy gripping and operation.

[0015] As an improvement, a branch pipe is provided on the side of the connecting pipe that is perpendicular to the liquid inlet. The branch pipe is arranged perpendicular to the axis of the connecting pipe. The inner side of the branch pipe has a one-way valve structure to restrict the liquid flow. The outer side of the opening of the branch pipe has threads to cooperate with the end cap for sealing.

[0016] As an improvement, an auxiliary connecting pipe is provided on one side of the connecting pipe. The auxiliary connecting pipe is located on one side of the branch pipe, and its lower end facing the liquid inlet is provided with a rubber interface. There are two sets of rubber interfaces, and their outer sides are equipped with detachable sealing ends. The auxiliary connecting pipe is used to temporarily connect other pipelines for drug supply.

[0017] As an improvement, the middle part of the movable sleeve is a collar structure, which is used to connect with the tapered tube. The lower end of the movable sleeve has a claw structure, which is used to limit the maximum position of the tapered tube by cooperating with the outer inclined surface. The small opening of the tapered tube is set towards the spraying end to reduce the diameter of the air outlet and increase the internal liquid supply pressure.

[0018] As an improvement, the upper end of the conical tube is equipped with a spiral tube, the outer side of the spiral tube is equipped with a fixed round tube, the lower end of the spiral tube is connected to the conical tube, so as to make the liquid medicine be discharged in a spiral rotation state, and the upper end of the spraying end is equipped with multiple fine through holes for uniformly spraying the liquid medicine.

[0019] As an improvement, the end of the support rod away from the spray head is equipped with a hook structure, and the connecting rod part of the movable sleeve abuts against the hook structure to cooperate with the sealing sleeve for fixing.

[0020] The beneficial effects of this invention are as follows: by adjusting the linkage between the movable sleeve and the support rod, the sealing sleeve can be opened and attached to the respiratory tract wall, forming a temporary closed space around the spray nozzle, effectively preventing the loss and dilution of the drug solution, and concentrating the anesthetic solution on the target mucosa, significantly improving the drug utilization rate and the integrity and duration of the topical anesthesia.

[0021] The opening and closing angle of the support rod can be adjusted with one hand by sliding the guide rail on the surface of the air inlet tube, adjusting the rod, and locking the bolt. This allows the sealing sleeve to adapt to the shape of different patients' oropharynx and laryngopharynx. The claw at the lower end of the movable sleeve rod cooperates with the outer bevel of the conical tube to limit the movement and prevent excessive opening. The operation is safe and precise.

[0022] By setting a tapered tube and pointing the small opening toward the spray nozzle, the internal drug supply pressure can be increased. After the drug rotates in a spiral tube, it is sprayed out from the spray nozzle with fine through holes, achieving uniform and fine atomization. This ensures that the drug is efficiently deposited in target areas such as the glottis and laryngeal mucosa, reducing irritation and coughing. Attached Figure Description

[0023] Figure 1 This is a front view of an upper respiratory tract surface anesthesia device according to the present invention;

[0024] Figure 2 This is a front view of the spray tip portion of an upper respiratory tract surface anesthesia device according to the present invention.

[0025] In the diagram: 1. Inlet pipe; 2. Adjusting rod; 3. Locking bolt; 4. Handle; 5. Connecting pipe; 6. Branch pipe; 7. Auxiliary connecting pipe; 8. Tapered pipe; 9. Movable sleeve rod; 10. Spiral pipe; 11. Spraying end; 12. Sealing sleeve; 13. Support rod. Detailed Implementation

[0026] To make the content of this invention easier to understand, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Identical components are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0027] like Figure 1 and Figure 2 As shown, an upper respiratory tract surface anesthesia device includes an inlet pipe 1, a connecting pipe 5, and a spraying end 11. The lower end of the inlet pipe 1 is connected to the connecting pipe 5 via a flexible tube. The connecting pipe 5 is used to connect to an external drug supply or air supply line. An adjusting rod 2 is slidably sleeved on the outer side of the inlet pipe 1. The upper end of the inlet pipe 1 has a conical tube 8. A movable sleeve rod 9 is movably sleeved on the outer side of the conical tube 8. The spraying end 11 is located at the upper end of the conical tube 8 and is used to spray anesthetic liquid externally. The upper end of the conical tube 8 has a sealing sleeve 12. The inner side of the sealing sleeve 12 has a support rod 13. One end of the support rod 13 is rotatably connected to the conical tube 8. A connecting rod is rotatably connected to the outer side of the movable sleeve rod 9 and connected to the middle of the support rod 13. The upper end of the adjusting rod 2 has an ear plate. A connecting rod is rotatably connected to the inner side of the ear plate and rotatably connected to the movable sleeve rod 9. The adjusting rod 2 is used to adjust the angle of the support rod 13 to cooperate with the sealing sleeve 12 to seal the airway. The spray nozzle 11 is made of soft rubber and has a smooth protective film on its surface to reduce discomfort caused by skin contact.

[0028] The air intake pipe 1 is made of medical-grade rigid plastic, with a guide rail on its surface arranged axially. The inner wall of the adjusting rod 2 has a sliding groove for sliding with the guide rail on the surface of the air intake pipe 1, limiting the axial rotation of the adjusting rod 2 and allowing for angle adjustment with the movable sleeve 9. The upper and lower ends of the air intake pipe 1 have limit protrusions to restrict the sliding position of the adjusting rod 2. One side of the adjusting rod 2 has a through hole perpendicular to the axis of the air intake pipe 1. The through hole has threads on its inner side and is fitted with a locking bolt 3. The lower end of the locking bolt 3 has a rubber anti-slip pad. By tightening the threads, it fully contacts the air intake pipe 1, increasing friction and restricting the movement of the adjusting rod 2. The air intake pipe 1 is made of transparent material, allowing the operator to directly observe its internal structure.

[0029] In use, the operator connects the corresponding tubing to the connecting pipe 5, and then connects the flexible hose to supply the medication to the air inlet pipe 1. After disinfecting the spray nozzle 11 and sealing sleeve 12, the operator inserts it into the respiratory tract and then slides the adjusting rod 2 to raise the support rod 13 until a semi-closed state is achieved. During this process, oxygen and medication enter the air inlet pipe 1 through the flexible hose, and then enter the respiratory tract through the spray nozzle 11 to achieve anesthesia.

[0030] The upper end of the connecting tube 5 has a handle 4, which is cylindrical and located on the side of the connecting tube 5 away from the inlet. The handle 4 has a cavity in the middle for hose installation and has anti-slip texture on the outer side for easy gripping. A branch tube 6 is located on the side of the connecting tube 5 perpendicular to the inlet. The branch tube 6 is perpendicular to the axis of the connecting tube 5 and has a one-way valve structure on its inner side to restrict liquid flow. The opening of the branch tube 6 has threads on its outer side for sealing with an end cap. An auxiliary connecting tube 7 is located on one side of the connecting tube 5, next to the branch tube 6. Its lower end, facing the inlet, has two sets of rubber interfaces with detachable sealing ends. The auxiliary connecting tube 7 is used for temporarily connecting other tubes for drug supply. The auxiliary connecting tube 7 can be replaced to connect to different tubes or needle structures as needed to adapt to different drug solutions.

[0031] The movable sleeve 9 has a collar structure in the middle for movably connecting with the tapered tube 8. The lower end of the movable sleeve 9 has a claw structure for limiting the maximum position of the tapered tube 8 by engaging with its outer inclined surface. The small opening of the tapered tube 8 faces the spray head 11 to reduce the outlet diameter and increase the internal liquid supply pressure. The upper end of the tapered tube 8 has a spiral tube 10 with a fixed round tube on its outer side. The lower end of the spiral tube 10 connects to the tapered tube 8, allowing the liquid to be discharged in a spiral rotation. The upper end of the spray head 11 has multiple fine through holes for evenly spraying the liquid. The end of the support rod 13 away from the spray head 11 has a hook structure. The connecting rod portion of the movable sleeve 9 engages with the hook structure for securing the sealing sleeve 12. The sealing sleeve 12 has anti-slip textures on its edge, and the inner side of the anti-slip textures has a rubber ring to support the gap between it and the support rod 13, fully meeting the requirements for sealing the respiratory tract.

[0032] During use, the spiral tube 10 can be replaced with different lengths according to usage requirements to ensure use at different anesthesia positions. After the sealing sleeve 12 is in place, the operator can rotate the locking bolt 3 to block the movement of the adjusting rod 2 by pressing it against the air inlet tube 1, thereby restricting the position of the sealing sleeve 12. When additional medication is needed, the operator can connect the corresponding tubing to the branch tube 6 and auxiliary connecting tube 7 according to the flow requirements. After being pressurized through the conical tube 8, the anesthetic drug will pass through the spiral tube 10 for gas flow direction adjustment and further pressurization. Through the through-hole of the spray head 11, it can be evenly sprayed in multiple directions, making the overall atomized particles more uniform and fine, reducing coughing irritation.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for surface anesthesia of the upper respiratory tract, characterized in that, Includes an air inlet pipe (1), a connecting pipe (5), and a spray nozzle (11). The lower end of the air inlet pipe (1) is connected to the connecting pipe (5) via a flexible hose. The connecting pipe (5) is used to connect to an external drug supply or air supply pipeline. An adjusting rod (2) is slidably sleeved on the outside of the air inlet pipe (1). The upper end of the air inlet pipe (1) has a conical tube (8). A movable sleeve rod (9) is movably sleeved on the outside of the conical tube (8). The spray nozzle (11) is located at the upper end of the conical tube (8) and is used to spray anesthetic liquid externally. The upper end of the tube (8) is equipped with a sealing sleeve (12), and the inner side of the sealing sleeve (12) is equipped with a support rod (13). One end of the support rod (13) is rotatably connected to the conical tube (8). The outer side of the movable sleeve rod (9) is rotatably connected to a connecting rod that is connected to the middle of the support rod (13). The upper end of the adjusting rod (2) is equipped with an ear plate, and the inner side of the ear plate is rotatably connected to a connecting rod that is rotatably connected to the movable sleeve rod (9). The adjusting rod (2) is used to adjust the angle of the support rod (13) to cooperate with the sealing sleeve (12) to seal the airway.

2. The upper respiratory tract surface anesthesia device according to claim 1, characterized in that, The air inlet pipe (1) is made of medical hard plastic and has a guide rail set along the axial direction on its surface. The inner wall of the adjusting rod (2) has a sliding groove for sliding with the guide rail on the surface of the air inlet pipe (1) to limit the axial rotation of the adjusting rod (2) and to adjust the angle with the movable sleeve rod (9).

3. The upper respiratory tract surface anesthesia device according to claim 2, characterized in that, The upper and lower ends of the air intake pipe (1) are equipped with limit protrusions to limit the sliding position of the adjusting rod (2). One side of the adjusting rod (2) is equipped with a through hole, which is set perpendicular to the axis of the air intake pipe (1). The inner side of the through hole is threaded and connected with a locking bolt (3). The lower end of the locking bolt (3) is equipped with a rubber anti-slip pad. By tightening the thread, it fully contacts the air intake pipe (1) to increase the friction force and limit the movement of the adjusting rod (2).

4. The upper respiratory tract surface anesthesia device according to claim 1, characterized in that, The upper end of the connecting tube (5) is equipped with a handle (4). The handle (4) is cylindrical and located on the side of the connecting tube (5) away from the liquid inlet. It has a cavity in the middle for hose installation. The outer side of the handle (4) has anti-slip texture for easy gripping and operation.

5. The upper respiratory tract surface anesthesia device according to claim 4, characterized in that, The connecting pipe (5) has a branch pipe (6) on the side perpendicular to the liquid inlet. The branch pipe (6) is set perpendicular to the axis of the connecting pipe (5). The inner side of the branch pipe (6) has a one-way valve structure to restrict the flow of liquid. The outer side of the opening of the branch pipe (6) has threads to cooperate with the end cap for sealing.

6. The upper respiratory tract surface anesthesia device according to claim 5, characterized in that, An auxiliary connecting pipe (7) is provided on one side of the connecting pipe (5). The auxiliary connecting pipe (7) is located on one side of the branch pipe (6). Its lower end is provided with a rubber interface facing the liquid inlet. There are two sets of rubber interfaces, and the outer side of each interface has a detachable sealing end. The auxiliary connecting pipe (7) is used to temporarily connect other pipes for drug supply.

7. The upper respiratory tract surface anesthesia device according to claim 1, characterized in that, The movable sleeve (9) has a collar structure in the middle, which is used to connect with the tapered tube (8) in a movable manner. The lower end of the movable sleeve (9) has a claw structure, which is used to limit the maximum position of the tapered tube (8) by cooperating with the outer inclined surface. The small opening of the tapered tube (8) is set towards the spray end (11) to reduce the diameter of the air outlet and increase the internal liquid supply pressure.

8. The upper respiratory tract surface anesthesia device according to claim 1, characterized in that, The upper end of the conical tube (8) is equipped with a spiral tube (10), and the outer side of the spiral tube (10) is equipped with a fixed round tube. The lower end of the spiral tube (10) is connected to the conical tube (8) to make the liquid medicine be discharged in a spiral rotation state. The upper end of the spraying head (11) is equipped with multiple fine through holes to spray the liquid medicine evenly.

9. The upper respiratory tract surface anesthesia device according to claim 1, characterized in that, The end of the support rod (13) away from the spray head (11) has a hook structure, and the connecting rod part of the movable sleeve rod (9) abuts against the hook structure to cooperate with the sealing sleeve (12) for fixed installation.

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