AU2021107544A4

AU2021107544A4 - Medical laryngeal mask airway

Info

Publication number: AU2021107544A4
Application number: AU2021107544A
Authority: AU
Inventors: Feng Deng
Original assignee: Zhejiang Jenston Medical Technology Co Ltd
Current assignee: Zhejiang Jenston Medical Technology Co Ltd
Priority date: 2021-02-20
Filing date: 2021-07-12
Publication date: 2021-10-21
Anticipated expiration: 2029-07-12
Also published as: WO2022174549A1; CN217472518U

Abstract

OF THE DISCLOSURE The present disclosure belongs to the technical field of medical apparatus and instruments, and specifically relates to a medical laryngeal mask airway. A surface of the medical laryngeal mask airway is provided with a transparent insulating lubricating coating for resisting corrosive gas invasion; the medical laryngeal mask airway includes a cuff, a neck, and a main airway catheter; the neck is disposed in the cuff, a front end of the main airway catheter penetrates into the cuff to communicate with the neck, and a rear end of the cuff is connected to an outer surface of the main airway catheter; and the cuff, the neck, and the main airway catheter are formed into a whole through injection molding. The present disclosure has the characteristics of capabilities to reduce the occurrence of postoperative complications of patients, and save costs and wide applicability. -F1/2 FIG. 1

Description

-F1/2

FIG. 1

MEDICAL LARYNGEAL MASK AIRWAY TECHNICAL FIELD

[01] The present disclosure belongs to the technical field of medical apparatus and instruments, and specifically relates to a medical laryngeal mask airway.

BACKGROUNDART

[02] A laryngeal mask airway is used in a general anesthesia surgery to establish a safe airway.

[03] The laryngeal mask airway is made of a high polymer material such as PVC or silica gel, through which certain gas molecules can penetrate, for example nitrous oxide (N 2 0) can penetrate the silicone material, leading to an increased pressure in a cuff of the laryngeal mask airway.

[04] In the production process of an inflatable laryngeal mask airway, components such as a cuff, a neck, and a main tube need to be separately produced. Then the cuff and the neck need to be glued together. After that, the main tube is glued with the cuff and the neck. During the bonding, the glue is applied to a same position many times. The laryngeal mask airway consists of multiple components. The production process has many working procedures, the bonding technique is complicated, and there are many control points.

[05] However, the existing laryngeal mask airway has the following problems:

[06] 1. An inflation volume of the laryngeal mask airway and pressure control inside the cuff are major concerns of clinical anesthetists. When used as anesthetic gas, nitrous oxide N 2 0 (laughing gas) quickly diffuses into the cuff of the laryngeal mask airway, and causes a steep increase in the pressure inside the cuff within a short time, which is much higher than a throat mucosal capillary perfusion pressure, and may cause ischemic damage to oropharyngeal mucosa, leading to an increased incidence of postoperative throat complications.

[07] 2. An existing inflatable laryngeal mask airway mainly consists of components such as a cuff, a neck, a main tube, an inflation system (if any), and a corresponding breathing circuit connector. The components such as the cuff, the neck, and the main tube need to be processed separately and then combined together by bonding. The laryngeal mask airway has many processing steps, and many technical control key points and focuses. For example, it is necessary to check an appearance of the bonded surface and test a bonding strength many times during the bonding, which causes increases in production control elements and production costs.

[08] 3. An existing inflation-free laryngeal mask airway mainly consists of components such as a cuff, a neck, a main tube, and a breathing circuit connector. This type of laryngeal mask airway cannot be inflated during use, but human larynxes are different in structure (the larynxes come in all shapes and size). Therefore, the inflation-free laryngeal mask airway is poor in adaptability. It is necessary to constantly try laryngeal mask airways of different sizes to seal the airway of the human larynx, which puts high requirements on operation and clinical experience of a clinical user.

[09] Therefore, it is very necessary to design a medical laryngeal mask airway that can reduce postoperative complications, and save costs and has a wide range of applicability.

[10] For example, a Chinese invention patent NO. CN201420604718.7 describes an inflation-free laryngeal mask airway with a liquid suction function, including a neck, and a soft rubber cuff, where an inflation cavity is formed between the soft rubber cuff and a mask body, a plurality of suction ports are provided in the mask body, and a ventilation channel, a feeding and drainage channel, and a suction channel are disposed in the ventilation tube. The ventilation channel is communicated with the inflation cavity. The feeding and drainage channel penetrates the ventilation tube and the mask body and is connected with a feeding port provided at a front end of the mask body. The suction port is communicated with the suction channel. The neck is provided with an inflation inlet, a feeding hole, and a suction hole. The inflation hole is communicated with the ventilation channel. The feeding hole is communicated with the feeding and drainage channel. The suction hole is communicated with the suction channel. Although the structure is simple, the design is reasonable, the sealing is good, the mucus and blood clots in the throat can be discharged in time, the ventilation ports are not easy to be blocked, and the damage to the patient is small, there are still shortcomings that the overall structure is assembled by multiple components, resulting in many processing steps, processing technique key points and focuses, increased production costs and single applicability. Moreover, it needs to continuously try laryngeal mask airways of different sizes to seal the laryngeal airway after insertion into the human body.

SUMMARY

[11] The present disclosure aims to overcome the defects of high production cost, poor applicability and high possibility of postoperative complications of patients of existing medical laryngeal mask airways in the prior art, and provides a medical laryngeal mask airway that can reduce the postoperative complications of the patients and save costs, and has a wide applicability.

[12] In order to achieve the objective above, the present disclosure uses the following technical solutions.

[13] Provided is a medical laryngeal mask airway. A surface of the medical laryngeal mask airway is provided with a transparent insulating lubricating coating for resisting corrosive gas invasion; the medical laryngeal mask airway includes a cuff, a neck, and a main airway catheter; the neck is disposed in the cuff, a front end of the main airway catheter penetrates into the cuff to communicate with the neck, and a rear end of the cuff is connected to an outer surface of the main airway catheter; and the cuff, the neck, and the main airway catheter are formed into a whole by injection molding.

[14] Preferably, the surface of the medical laryngeal mask airway is provided with the transparent insulating lubricating coating for resisting corrosive gas invasion.

[15] Preferably, the surface of the medical laryngeal mask airway is provided with the transparent insulating lubricating coating for resisting penetrating gas invasion.

[16] Preferably, materials used for the transparent insulating lubricating coating include parylene.

[17] Preferably, a curvature of the main airway catheter is 145° to 175°.

[18] Preferably, the cuff is provided with a non-slip corrugated structure for preventing the laryngeal mask airway from retreating.

[19] Preferably, the main airway catheter is made of a silicone or PVC material with ahardness of55°to 80°.

[20] Preferably, a blocking sheet is disposed on the neck, and an opening for ventilation is disposed on the blocking sheet.

[21] Preferably, the surface of the medical laryngeal mask airway includes an edge, a crack and an inner surface.

[22] Compared with the prior art, the present disclosure has the beneficial effects: (1) a special blocking coating is added on the surface of the laryngeal mask airway to isolate the gas from penetrating the cuff, so that the pressure in the laryngeal mask airway is increased, and the occurrence of the postoperative complications of the patients is reduced; (2) the cuff, neck, and the main airway catheter are formed into a whole by injection molding, and are then bonded to form the whole structure, which saves the production costs of the laryngeal mask airway, improves the production efficiency, and avoids air leakage at the bonded position; and (3) the present disclosure has wide applicability and can be completely fitted to the throat of the patient, which overcomes the problem of poor clinical applicability of the inflation-free laryngeal mask airway.

BRIEFT DESCRIPTION OF THE DRAWINGS

[23] FIG. 1 is a schematic structural diagram of the present disclosure.

[24] FIG. 2 is a top view of the present disclosure.

[25] FIG. 3 is a bottom view of the present disclosure.

[26] Reference signs in the drawings: 1. cuff, 2. neck, 3. main airway catheter, 4. non-slip corrugated structure, 5. blocking sheet, 6. opening, and 7. trachea outlet.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[27] In order to illustrate the embodiments of the present disclosure, the specific implementations of the present disclosure will be illustrated below with reference to the drawings. Obviously, the drawings in the following descriptions are merely some embodiments of the present disclosure. For a person of ordinary skill in the art, other drawings and other implementations may be obtained according to these drawings without creative work.

[28] Embodiment 1

[29] For a medical laryngeal mask airway shown in FIG. 1 and FIG. 2, a surface of the medical laryngeal mask airway is provided with a transparent insulating lubricating coating for resisting corrosive gas invasion. The medical laryngeal mask airway includes a cuff 1, a neck 2, and a main airway catheter 3. The neck is disposed in the cuff, a front end of the main airway catheter penetrates into the cuff to communicate with the neck, and a rear end of the cuff is connected to an outer surface of the main airway catheter. The cuff, the neck, and the main airway catheter are formed into a whole by injection molding.

[30] The transparent insulating lubricating coating is a special blocking coating configured to insulate gas from penetrating the cuff, such that a pressure in the laryngeal mask cuff is increased and the occurrence of postoperative complications of patients are reduced. For the cuff, the neck, and the main airway catheter, a mode that the three components are respectively processed, and bonded and assembled together is changed into a mode that the three components are combined together and once-formed, and are then bonded into a whole structure, which saves the production costs of the laryngeal mask airway, and avoids the occurrence of air leakage at a bonded position.

[31] Further, materials used for the transparent insulating lubricating coating include parylene.

[32] The parylene material has the following advantages:

[33] it has good hydrophobicity (self-lubrication), and does not adhere to human body fluids clinically, which reduces infection caused by splashing, spraying, and the like of body fluid adhesion; and

[34] it complies with ISO-10993 biological test requirements, including cytotoxicity, sensitization, intradermal irritation, acute systemic toxicity, implantation and hemolytic tests.

[35] The parylene material can be applied to surfaces of various shapes, and can play a good isolation protection function in harsh environments such as salt spray, mold, humidity, and corrosion.

[36] In addition, the parylene material can withstand conventional disinfection.

[37] With a protective polymer material, i.e., the parylene material, active molecules of parylene are completely attached to the surface of the laryngeal mask airway through a unique vacuum vapor deposition process to form a pinhole-free transparent insulating lubricating coating with a uniform thickness, thus providing a complete high-quality protective coating for the laryngeal mask airway to resist invasion of acid and alkali, salt spray, mold and various corrosive gas or penetrating gas. At the same time, the parylene is not liquid, so it will not accumulate during the coating; and a parylene coating is not a conventional solvent-based coating, and there is no solvent evaporation after use, so that no pinholes will be formed in the surface of the laryngeal mask to form a leakage point.

[38] The surface of the laryngeal mask airway includes an edge, a crack and an inner surface. The inner surface includes an interior surface of the cuff of the laryngeal mask airway. The transparent insulating lubricating coating covers the surface of the laryngeal mask airway.

[39] The parylene coating is coated based on the principle of vapor deposition. A dimer of the parylene is changed from a solid state to a gas state after being heated in a vacuum state, and is then changed from the gas state to the solid state to deposit on a surface of a workpiece. The whole process is completed in a sealed space, and avoids an independent intermediate liquid process, thereby avoiding damage to an operator and the environment.

[40] Further, a curvature of the main airway catheter is 145° to 175°. The main airway catheter adopts a large arc design, so that a channel inside the main airway catheter is straighter than that of the existing laryngeal mask airway, so that a bronchoscope can pass smoothly through the channel without being stuck in the middle.

[41] Further, as shown in FIG. 3, the cuff is provided with a non-slip corrugated structure 4 for preventing the laryngeal mask airway from retreating. The non-slip corrugated structure 4 can increase a resistance to retreat to prevent the laryngeal mask airway from being squeezed out and displaced, and reduces damage and stress when it comes into contact with the front of the mucosa.

[42] Further, the main airway catheter 3 is made of a silicone or PVC material with a hardness of 55° to 80°. The main airway catheter 3 made of low-hardness materials is easier to bend.

[43] Further, as shown in FIG. 3, the neck 2 is provided with a blocking sheet 5, and the blocking sheet 5 is provided with an opening 6 for ventilation. This design is to prevent the epiglottis cartilage from blocking a pore in the neck, and can keep the epiglottis out of the pore of the neck. When the epiglottis slips from the blocking piece to block the airway, the opening 6 in the blocking piece 5 can play a role of ventilation.

[44] In addition, the front end of the cuff is provided with a trachea outlet 7. The trachea outlet 7 is an obliquely arranged structure, which can reduce a thickness of a front end of the cuff, while reducing a resistance of placing the laryngeal mask airway, preventing the laryngeal mask airway from turning over during placement, and does not put excessive pressure on cricoarytenoid joints.

[45] According to the present disclosure, a special blocking coating is added on the surface of the laryngeal mask airway to isolate the gas from penetrating the cuff, so that a pressure in the laryngeal mask airway is increased, and the occurrence of postoperative complications of the patients is reduced. The cuff, the neck, and the main airway catheter are formed into a whole by injection molding, and are then bonded to form the whole structure, which saves the production costs of the laryngeal mask airway, improves the production efficiency, and avoids air leakage at a bonded position. The present disclosure has wide applicability, can be completely fitted to the larynx of the patient, and overcomes the problem of poor clinical applicability of the inflation-free laryngeal mask.

[46] The descriptions above are only detailed descriptions of the preferred embodiments and principles of the present disclosure. For a person of ordinary skill in the art, according to the ideas provided by the present disclosure, there will be changes in specific implementations, and these changes should also be regarded as the protection scope of the present disclosure.

Claims

WHAT IS CLAIMED IS:

1. A medical laryngeal mask airway, comprising a cuff, a neck, and a main airway catheter, wherein the neck is disposed in the cuff, a front end of the main airway catheter penetrates into the cuff to communicate with the neck, and a rear end of the cuff is connected to an outer surface of the main airway catheter; a surface of the medical laryngeal mask airway is provided with a lubricating coating for resisting corrosive gas invasion; and the cuff, the neck, and the main airway catheter are formed into a whole through injection molding.

2. The medical laryngeal mask airway according to claim 1, wherein the lubricating coating is a transparent insulating lubricating coating.

3. The medical laryngeal mask airway according to claim 2, wherein materials used for the transparent insulating lubricating coating comprise parylene.

4. The medical laryngeal mask airway according to claim 2, wherein a curvature of the main airway catheter is 145° to 175°.

5. The medical laryngeal mask airway according to claim 2, wherein the cuff is provided with a non-slip corrugated structure for preventing the laryngeal mask airway from retreating.

6. The medical laryngeal mask airway according to claim 2, wherein the main airway catheter is made of a silicone or PVC material with a hardness of 55° to 80°.

7. The medical laryngeal mask airway according to any one of claims 1 to 6, wherein the neck is provided with a blocking sheet, and the blocking sheet is provided with an opening for ventilation.

8. The medical laryngeal mask airway according to any one of claims 1 to 6, wherein the surface of the medical laryngeal mask airway comprises an edge, a crack, and an inner surface.

9. The medical laryngeal mask airway according to claim 2, wherein the surface of the medical laryngeal mask airway is provided with the transparent insulating lubricating coating for resisting corrosive gas invasion.

10. The medical laryngeal mask airway according to claim 2, wherein the surface of the medical laryngeal mask airway is provided with the transparent insulating lubricating coating for resisting penetrating gas invasion.

11. A medical laryngeal mask airway, comprising a cuff, a neck, and a main airway catheter, wherein the neck is disposed in the cuff, a front end of the main airway catheter penetrates into the cuff to communicate with the neck, and a rear end of the cuff is connected to an outer surface of the main airway catheter; a surface of the medical laryngeal mask airway is provided with a lubricating coating for resisting corrosive gas invasion; and the cuff, the neck, and the main airway catheter are formed into a whole through injection molding.

FIG. 1 －1/2－

FIG. 3 FIG. 2 －2/2－