CN110681027B

CN110681027B - Closed anesthetic mask capable of preventing anesthetic gas from escaping

Info

Publication number: CN110681027B
Application number: CN201911076053.0A
Authority: CN
Inventors: 马亚飞; 王应云; 冯毅
Original assignee: First Affiliated Hospital of Henan University of Science and Technology
Current assignee: First Affiliated Hospital of Henan University of Science and Technology
Priority date: 2019-11-06
Filing date: 2019-11-06
Publication date: 2023-05-26
Anticipated expiration: 2039-11-06
Also published as: CN110681027A

Abstract

The invention relates to the field of anesthesia auxiliary equipment, in particular to a closed type anesthesia mask capable of preventing anesthetic gas from escaping. The breathing valve can automatically control the on-off of the vent pipe and the exhaust pipe and the inner cavity of the mask body along with the breathing of a patient; the breather valve comprises a rigid pipe with one end closed and the other end open and a light foam ball which is arranged in the rigid pipe in a sliding way; the inner cavity of the rigid pipe is divided into a first cavity part and a second cavity part by the light foam ball, the first cavity part and the second cavity part are connected through a bypass pipe, and the connecting ports of the vent pipe and the second cavity part and the connecting ports of the exhaust pipe and the second cavity part can be plugged by the light foam ball sliding to the corresponding positions. The invention can avoid various problems caused by escape of anesthetic gas in the anesthetic process, has simple structure, is easy to realize and is convenient to control.

Description

Closed anesthetic mask capable of preventing anesthetic gas from escaping

Technical Field

The invention relates to the field of anesthesia auxiliary equipment, in particular to a closed type anesthesia mask capable of preventing anesthetic gas from escaping.

Background

Inhalation anesthesia is an anesthetic method in which an anesthetic is inhaled through the respiratory tract to cause central nervous system inhibition, and the patient is temporarily conscious of the patient to be lost, so that the patient does not feel pain around the body. Is the main method of general anesthesia, the depth of which is related to the partial pressure of the drug in brain tissue, and when the anesthetic is discharged from the body or metabolized in the body, the patient gradually resumes waking without leaving any sequelae. The inhalation anesthesia causes little metabolism and decomposition in the body. Most of the liquid is discharged from the lung in the original shape, so inhalation anesthesia is easy to control, safer and more effective, and is a common method in anesthesia.

In clinical applications, inhalation anesthesia is typically assisted by an anesthesia mask. Volatile anesthetic gases are introduced into the anesthetic mask in a continuous positive pressure mode so as to be absorbed by a patient wearing the anesthetic mask and generate an anesthetic effect. The prior art anesthetic masks are typically non-enclosed for venting exhaled gases from the patient. The inner cavity of the anesthetic mask is also in a positive pressure state in the expiration process of the patient, so that the anesthetic gas is inevitably escaped under the positive pressure cooperation of the introduced anesthetic gas. On the one hand, the escape of anesthetic gas can affect the operation doctor, possibly resulting in the decline of the reaction capacity and concentration capacity of the doctor, and bringing unnecessary risks to the operation process; on the other hand, uncontrollable escape of anesthetic gas can lead to medicine waste, and the inhalation amount of patients is difficult to accurately measure, so that accurate anesthesia of patients with individual differences cannot be achieved.

Disclosure of Invention

The invention aims to provide the closed type anesthetic mask capable of preventing anesthetic gas from escaping, so that various problems caused by the escape of the anesthetic gas in the anesthetic process are avoided, and the closed type anesthetic mask is simple in structure, easy to realize and convenient to control.

In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a can prevent closed anesthesia face guard of anesthetic gas escape, including the face guard body, be equipped with the elastic fixation area that can fix the face guard body on the face of patient in the face guard body, still be equipped with along the week of face guard body and be used for hugging closely the silica gel pad that cooperates in order to keep the inner chamber of face guard body closed with patient's face, still include the breather pipe that is used for letting in anesthetic gas in the face guard body inner chamber for patient's inhalation and be used for taking out the exhaust tube of patient's exhalate gas in the face guard body inner chamber, and breather pipe and exhaust tube are all connected with the face guard body through a breather valve, the breather valve can be with the breathing automatic control breather pipe and exhaust tube and the break-make of face guard body inner chamber of patient;

the breathing valve comprises a rigid pipe with one end closed and the other end open, and a light foam ball arranged in the rigid pipe in a sliding way, wherein the open end of the rigid pipe is fixed on the mask body through a through hole formed in the mask body, so that the light foam ball can slide back and forth along the length direction of the rigid pipe under the driving of the breathing of a patient; the inner cavity of the rigid pipe is divided into a first cavity part close to the mask body and a second cavity part far away from the mask body by the light foam ball, the first cavity part and the second cavity part are connected through a bypass pipe, the vent pipe is communicated with the second cavity part, the exhaust pipe is communicated with the first cavity part, and the connecting ports of the vent pipe and the second cavity part and the connecting ports of the exhaust pipe and the second cavity part can be plugged by the light foam ball sliding to the corresponding positions.

Preferably, a limiting plate is fixedly arranged in the first cavity part, a plurality of vent holes are formed in the limiting plate, and the limiting plate and the closed end of the rigid pipe jointly form a limiting combination for controlling the sliding stroke of the light foam ball.

Preferably, the cross sections of the limiting plate and the closed end of the rigid pipe are circular arc shapes, so that the light foam ball slides to the limiting plate to plug the exhaust pipe, and slides to the closed end of the rigid pipe to plug one end of the vent pipe and the bypass pipe connected with the second cavity.

Preferably, the inner side of the rigid pipe wall is provided with a ventilation net at the connection position with the ventilation pipe, the exhaust pipe or the bypass pipe.

Preferably, the rigid tube is secured to the mask body in a vertical orientation.

Preferably, the rigid tube is connected to the mask body by a hose.

Preferably, the rigid tube is made of a transparent material.

Preferably, the light foam ball is a hollow ball, and a waterproof film is sprayed outside the light foam ball.

Advantageous effects

The mask body is closed, and anesthetic gas is introduced into the inner cavity of the mask body through the breather pipe in the process of inhaling by a patient, so that the patient can inhale and anesthetize; during the expiration process of the patient, the exhaust gas in the inner cavity of the mask body is pumped out through the exhaust pipe, and the balance pressure in the inner cavity of the mask body is maintained. Thereby avoiding the escape of anesthetic gas to affect medical staff and avoiding the waste of anesthetic gas.

The anesthetic gas is introduced into the breather pipe and the exhaust gas is pumped out by the exhaust pipe, and the breather valve arranged on the mask body drives the breather pipe to alternately operate, and the breather pipe and the exhaust pipe are matched with each other and do not interfere with each other. The breather valve is driven by the breathing process of the patient, and has simple structure, easy realization and stable performance.

Drawings

FIG. 1 is a cross-sectional view of the present invention and shows a schematic view of the flow of gas during inhalation by a patient in a use state of the present invention;

FIG. 2 is also a cross-sectional view of the present invention and shows the flow of gases during exhalation by a patient in a use configuration of the present invention

The marks in the figure: 1. mask body, 2, exhaust tube, 3, breather pipe, 4, ventilative net, 5, rigid pipe, 501, second chamber portion, 502, first chamber portion, 6, bypass pipe, 7, light foam ball, 8, limiting plate.

Detailed Description

As shown in fig. 1 and 2, a closed type anesthetic mask capable of preventing anesthetic gas from escaping according to the present invention mainly comprises a closed type mask body 1. The face mask body 1 is provided with an elastic fixing band, after the face mask body 1 is covered on the mouth and nose parts of the face of a patient, the elastic fixing band can be fastened by a buckle, and the face mask body 1 is tightly contacted with the face of the patient by matching with a silica gel pad arranged at the position of the periphery of the face mask body 1, so that the inner cavity of the face mask body 1 is isolated from the outside. The elastic fixing band and the silicone pad are conventional and common in the art, and are not shown in fig. 1 and 2.

In addition to the mask body 1 described above, the present invention further includes a ventilation pipe 3 and an exhaust pipe 2 connected to the mask body 1 through a breathing valve. The breather pipe 3 is connected with the output ends of the anesthetic gas evaporator and the breathing machine through the booster pump and is used for leading the anesthetic gas and oxygen mixed gas into the inner cavity of the mask body 1 so as to enable a patient to breathe normally and inhale the anesthetic gas to achieve the purpose of anesthesia. The exhaust pipe 2 is connected with an exhaust pump and is used for exhausting the exhaust gas from the inner cavity of the mask body 1. The booster pump and the air pump are both in a normally open state in the anesthesia application process, and the breathing valve controls the on-off between the breather pipe 3 and the air pump pipe 2 and the inner cavity of the mask body 1. The breather valve is driven and controlled by the expiration and inspiration processes of the patient, and then the ventilation and air extraction processes are alternately carried out by the respiration of the patient, so that the technical effect that the ventilation and air extraction are consistent with the respiration rhythm of the patient is achieved.

The breather valve comprises a rigid tube 5 made of transparent material and a light foam ball 7 which is arranged on the rigid tube 5 in a sliding way. The upper end of the rigid tube 5 is closed, the lower end is open, and the open end is fixed in a through hole which is arranged on the mask body 1 and corresponds to the mouth and nose position of the patient. So that the rigid tubes 5 are distributed in a vertical direction when the patient wears the mask body 1 in supine. Due to the closed design of the mask body 1, the light foam ball 7 can be driven to rise when a patient exhales; when the patient inhales, the light foam ball 7 can be driven to descend under the action of the gravity of the light foam ball 7. The light foam ball 7 is driven by the respiration of the patient to slide back and forth along the height direction of the rigid tube 5. To increase the flexibility in sliding the lightweight foam ball 7 in the rigid tube 5, the lightweight foam ball 7 in this embodiment is not only made of lightweight porous foam material, but also has a hollow structure to ensure that the lightweight foam ball 7 can be driven to rise by the patient's exhalation. Meanwhile, in order to prevent the water vapor exhaled by the patient from being adsorbed on the light foam ball 7, the light foam ball 7 is made to increase in weight and is difficult to rise, and in the embodiment, a layer of compact waterproof film is further sprayed on the periphery of the light foam ball 7.

The outer diameter of the lightweight foam ball 7 is in slight clearance fit with the inner diameter of the rigid tube 5, and the inner cavity of the rigid tube 5 is divided by the lightweight foam ball 7 into a lower first cavity portion 502 and an upper second cavity portion 501. The first chamber portion 502 and the second chamber portion 501 are connected by a bypass pipe 6 provided outside the rigid pipe 5. One end of the bypass pipe 6 is connected to the first chamber 502 through a connection port formed in the wall of the rigid pipe 5 corresponding to the first chamber 502, and the other end is connected to the second chamber 501 through a connection port formed in the wall of the rigid pipe 5 corresponding to the second chamber 501. The vent pipe 3 is communicated with the second cavity part 501, and the exhaust pipe 2 is communicated with the first cavity part 502, so that the vent pipe 3 or the exhaust pipe 2 can be respectively plugged in the process that the light foam ball 7 slides up and down along with the breathing of a patient, and the ventilation and the air exhaust can be alternately changed along with the breathing rhythm of the patient.

In order to enable the light foam ball 7 to accurately seal the vent pipe 3 or the exhaust pipe 2, the invention is provided with a limiting plate 8 in the first cavity part 502 and close to the downward position of the exhaust pipe 2, and a plurality of vent holes for communicating the first cavity part 502 with the inner cavity of the mask body 1 are arranged on the limiting plate 8 at intervals; and the upper ends of the vent pipe 3 and the bypass pipe 6 are symmetrically connected at a position close to the lower part of the closed end of the rigid pipe 5. The limiting plate 8 and the closed end of the rigid tube 5 are arc-shaped with the radius slightly larger than that of the light foam ball 7 so as to avoid the light foam ball 7 from being blocked in.

As shown in fig. 1, during the inhalation process of the patient, the inner cavity of the mask body 1 is kept in a negative pressure state, and the light foam ball 7 is sucked into the limit plate 8 and seals the exhaust tube 2. At this time, the anesthetic gas and oxygen mixture in the ventilation tube 3 sequentially passes through the second cavity portion 501, the bypass tube 6 and the first cavity portion 502, and then enters the inner cavity of the mask body 1 through the bypass tube 6 from the second cavity portion 501 for inhalation by the patient. When the patient exhales, under the action of the mixture of the exhaled gas of the patient and the ventilation pipe 3, positive pressure is generated in the inner cavity of the breathing mask, and the light foam ball 7 is driven to slide upwards to the state shown in fig. 2 by the positive pressure. At this time, the light foam ball 7 seals the upper ends of the vent pipe 3 and the communicating pipe, and opens the exhaust pipe 2, and the exhaust pipe 2 pumps out the gas exhaled by the patient. When the patient inhales again, negative pressure is formed again in the inner cavity of the mask body 1 by the inhalation of the patient and the air suction of the air suction pipe 2, and the light foam ball 7 descends to the limit plate 8 again under the cooperation of the negative pressure and the self gravity, so that the state shown in fig. 1 is reached again. The ventilation pipe 3 and the exhaust pipe 2 are alternately ventilated by the breathing control breather valve of the patient in a reciprocating way, so that the escape of anesthetic gas is avoided.

After a patient inhales a certain amount of anesthetic gas to enter an anesthetic state, the mask body 1 is taken off. If the operation time is long, when secondary anesthesia is needed in the operation, the training stage between the anesthetic gas evaporators can be cut off after the patient enters an anesthetic state, so that the booster pump only lets the oxygen in the breathing machine into the inner cavity of the mask body 1. And reconnecting the booster pump and the anesthetic gas evaporator when secondary anesthesia is needed.

In this embodiment, the spacing between the limiting plate 8 and the closed end of the rigid tube 5 is smaller, and only two left and right light foam balls 7 can be accommodated, so that the sensitivity of the light foam balls 7 for blocking the corresponding pipelines is improved, and the blocking effect of the long-time positive pressure or negative pressure in the inner cavity of the mask body 1 caused by the sliding process of the light foam balls 7 on normal breathing of a patient is avoided. The inner side of the wall of the rigid pipe 5 is provided with an air-permeable net 4 at the position connected with the air pipe 3, the exhaust pipe 2 or the bypass pipe 6. Through ventilative net 4, on the one hand guaranteed the normal circulation of gas at each interface department, on the other hand also can avoid light foam ball 7 slip in-process card in interface position.

In another embodiment of the invention, the open end of the rigid tube 5 is connected to the mask body 1 by a hose, so that the rigid tube 5 can be fixed in a stable position on the operating table. This way, the vertical state of the rigid tube 5 is maintained, so that excessive contact friction between the light foam ball 7 and the inner wall of the rigid tube 5 can be avoided as much as possible, and further the sensitivity of the light foam to slide back and forth and the rigid tube 5 due to the respiration of a patient is ensured.

Claims

1. The utility model provides a can prevent closed anesthesia face guard of anesthetic gas escape, includes face guard body (1), is equipped with on face guard body (1) and can detain face guard body (1) and fix the elastic fixation area at patient's face, and the week portion along face guard body (1) still is equipped with and is used for hugging closely the cooperation with patient's face in order to keep the confined silica gel pad of inner chamber of face guard body (1), its characterized in that: the mask also comprises a breather pipe (3) for introducing anesthetic gas into the inner cavity of the mask body (1) for inhalation of a patient and an exhaust pipe (2) for exhausting the gas exhaled by the patient in the inner cavity of the mask body (1), wherein the breather pipe (3) and the exhaust pipe (2) are connected with the mask body (1) through a breather valve, and the breather valve can automatically control the on-off of the breather pipe (3) and the exhaust pipe (2) and the inner cavity of the mask body (1) along with the breathing of the patient;

the breather valve comprises a rigid pipe (5) with one end closed and the other end open, and a light foam ball (7) arranged in the rigid pipe (5) in a sliding way, wherein the open end of the rigid pipe (5) is fixed on the mask body (1) through a through hole formed in the mask body (1), so that the light foam ball (7) can slide back and forth along the length direction of the rigid pipe (5) under the driving of the breathing of a patient; the inner cavity of the rigid pipe (5) is divided into a first cavity part (502) close to the mask body (1) and a second cavity part (501) far away from the mask body (1) by a light foam ball (7), the first cavity part (502) and the second cavity part (501) are connected through a bypass pipe (6), the vent pipe (3) is communicated with the second cavity part (501), the exhaust pipe (2) is communicated with the first cavity part (502), and a connecting port of the vent pipe (3) and the second cavity part (501) and a connecting port of the exhaust pipe (2) and the second cavity part (501) can be blocked by the light foam ball (7) which slides to the corresponding position;

a limiting plate (8) is fixedly arranged in the first cavity part (502), a plurality of vent holes are formed in the limiting plate (8), and the limiting plate (8) and the closed end of the rigid pipe (5) form a limiting combination for controlling the sliding stroke of the light foam ball (7);

the cross sections of the closed ends of the limiting plate (8) and the rigid pipe (5) are arc-shaped, so that the light foam ball (7) slides to the limiting plate (8) to plug the exhaust pipe (2), and slides to the closed end of the rigid pipe (5) to plug one end of the vent pipe (3) and the bypass pipe (6) connected with the second cavity part (501).

2. A closed anesthetic mask as claimed in claim 1, wherein the anesthetic gas is prevented from escaping, and wherein: the inner side of the pipe wall of the rigid pipe (5) is provided with an air permeable net (4) at the connection position with the ventilating pipe (3), the exhaust pipe (2) or the bypass pipe (6).

3. A closed anesthetic mask as claimed in claim 1, wherein the anesthetic gas is prevented from escaping, and wherein: the rigid tube (5) is fixed on the mask body (1) along the vertical direction.

4. A closed anesthetic mask as claimed in claim 1, wherein the anesthetic gas is prevented from escaping, and wherein: the rigid tube (5) is connected to the mask body (1) by a hose.

5. A closed anesthetic mask as claimed in claim 1, wherein the anesthetic gas is prevented from escaping, and wherein: the rigid tube (5) is made of transparent material.

6. A closed anesthetic mask as claimed in claim 1, wherein the anesthetic gas is prevented from escaping, and wherein: the light foam ball (7) is a hollow ball, and a waterproof film is sprayed outside the light foam ball (7).