CN201855488U - Small dose supplement anesthesia evaporator - Google Patents

Abstract

The utility model provides a small-dose supplementary anesthesia evaporator, which is connected with a drug delivery mechanism, and includes an outer tank, an inner tank, an evaporation chamber, a porous evaporation core, a mixing chamber, a bypass pipe, a pressure compensation labyrinth ring, a sieve-shaped Supply ring, flow control cone and temperature compensator. The pressure compensation labyrinth ring effectively controls the pumping effect caused by pressure fluctuations, and compensates for changes in the concentration of evaporated drugs caused by pressure changes; it adopts an inner and outer double tank structure, and places two layers of porous evaporation cores on the inner side of the outer tank and the outer side of the inner tank, respectively. Maximize the evaporation area in the effective space; the set sieve-shaped supply ring can effectively accelerate the evaporation speed. The small-dosage supplementary anesthesia evaporator of the utility model cooperates with the front-end 0-7% integer level anesthetic drug concentration control mechanism to realize the 0.1-0.9% small-dosage supplementary anesthetic drug supply and improve the output precision of the anesthetic drug. It is suitable for low-concentration anesthetic drug supply and integrated use with various anesthesia machines currently used in hospitals.

Description

Small dose supplementary anesthesia vaporizer

technical field

The utility model relates to a medical device component, in particular to a small-dose supplementary anesthesia evaporator.

Background technique

The anesthesia vaporizer is a device that can effectively evaporate the anesthetic solution and accurately inject the anesthetic into the anesthesia breathing circuit at a certain concentration. The stability and accuracy of the output concentration of anesthetics determine the overall performance of the anesthesia machine, which is related to the success or failure of inhalation anesthesia and directly affects the safety of patients.

At present, all domestic evaporators are imported, and the maximum output concentration is 6%. The cylinder and the control valve, the two-way gas is mixed and then output for the patient's respiratory anesthesia. The design principle of anesthesia evaporator is basically the same as that of industrial evaporator. In order to accurately dilute the concentration of anesthetic vapor, the influence of temperature, flow rate, pressure and other factors must be excluded, especially when the volatilization of the drug is large, the drug will be affected. Ambient temperature, pressure, carrier gas flow characteristics and other factors have a great influence, making the output drug concentration unstable; if the required amount of drug is large, the evaporation area of the drug must be increased, which will increase the volume of the evaporation device, resulting in high cost. The volume is large, and the device is heavy, and it is inconvenient to carry and replace; therefore, the control accuracy is not high, only 0.2%. The structure of the evaporator currently used mainly includes a dosing unit, a tank body, an evaporation chamber, an evaporation core, a mixing chamber, a bypass pipe, a pressure compensation pipe, a concentration control unit and a temperature compensation unit. Some of these components have the following deficiencies: the pressure compensation tube is long and large in volume; only one layer of evaporation core is placed in a single tank, and the evaporation rate is limited; there is only one flow path between the pressure compensation device and the anesthetic evaporation area, resulting in There is inhomogeneity in the mixing with the diluent gas.

The purpose of this utility model is to overcome the above-mentioned shortcomings and deficiencies existing in the prior art, and to provide a small-dose supplementary anesthesia evaporator. Provide a certain concentration of drugs at an integer level of 0-7%, so the back-end small-dose supplementary anesthesia vaporizer only needs to provide a small-dose anesthetic supplement of 0.1-0.9%, and the control accuracy can be improved due to the small control concentration range. The utility model adopts different components of the previous evaporator in the realization process: the pressure compensation labyrinth ring is used to maximize the length of the pressure compensation tube in the effective space; The multi-layer porous evaporation core maximizes the evaporation area in the effective space; the sieve-shaped supply ring is used to increase the turbulence intensity, mix more fully, speed up the evaporation speed, and stabilize the output drug concentration; achieve small size, light weight, and rapid volatilization. Precisely control the dose of anesthetic drug concentration, the device is connected with the drug delivery mechanism, which can realize the low concentration anesthetic drug supply of 0.1-0.9%, cooperate with the front-end 0-7% integer level anesthetic drug concentration control mechanism, can realize 0.1-0.9% A small dose of anesthesia is added to improve control accuracy.

Utility model content

The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art, and provide a small-dosage supplementary anesthesia vaporizer which can precisely control the drug concentration.

In order to achieve the above purpose, the utility model adopts the following technical solutions: a small-dose supplementary anesthesia evaporator, which is connected with the anesthetic administration mechanism, including an outer tank, an inner tank, an evaporation chamber, a porous evaporation core, a mixing chamber, a bypass Pipe, pressure compensation labyrinth ring, sieve-shaped supply ring, flow control cone and temperature compensator; the lower part of the outer tank is connected with the anesthetic drug delivery mechanism, and the upper part of the outer tank is provided with an anesthetic gas input port and an anesthetic gas output port , the middle of the outer tank is provided with a metal barrier collar to divide the inner cavity into an upper cavity and a lower cavity. The lower cavity forms an evaporation chamber for accommodating anesthetics. The upper part of the inner tank extends into the upper chamber through the metal barrier collar; the porous evaporation core is placed in two layers, respectively connected to the inner wall of the outer tank and the outer wall of the inner tank in the evaporation room; the mixing chamber is set in the outer tank The upper chamber of the upper chamber, the lower part of the mixing chamber is connected with the inner tank through the communication pipe, the left end of the mixing chamber is connected with the bypass pipe, the right end of the mixing chamber is connected with the anesthetic gas output port through the pipeline; the left end of the bypass pipe is connected with the anesthetic gas input port The pressure compensation labyrinth ring is set above the metal barrier collar, its upper end is connected to the anesthetic gas input port through a pipeline, and its lower end is connected to the sieve-shaped supply ring through a pipeline; the sieve-shaped supply ring is set in the evaporation chamber and placed outside Between the inner wall of the tank and the porous evaporation core on the outer wall of the inner tank; the flow control cone is installed on the tank body of the outer tank and extends downward into the inner tank; the temperature compensator is connected in series on the bypass pipe; between the pressure compensation labyrinth ring and the screen shape A control valve is arranged on the pipeline connected with the supply ring.

The pressure compensating labyrinth ring is an annular pipe with an opening, and a plurality of baffles are arranged at intervals inside the pipe, and each baffle is connected to the inner wall and the outer wall of the pipe in a staggered manner.

The sieve-shaped supply ring is a cylindrical jacket structure, and a plurality of air outlet channels are separately arranged on the inner wall and the outer wall of the sieve-shaped supply ring.

The porous evaporation core is a cotton braid.

The temperature compensator includes a fixed valve port and a movable valve port, the fixed valve port is fixed on a metal rod with a low expansion coefficient, and the movable valve port is fixed on a metal rod with a high expansion coefficient; the high expansion coefficient The metal rod extends downward into the evaporation chamber, and can expand and contract with the temperature change in the evaporation chamber, thereby driving the movable valve port to move up and down, and adjusting the distance between the fixed valve port and the movable valve port.

The upper part of the inner tank is provided with a conical structure adapted to the flow control cone.

The drug delivery mechanism includes a drug delivery tank, an anesthetic drug delivery tube and a liquid level gauge; the anesthetic drug delivery tube is arranged at the lower part of the drug delivery tank, and a drug delivery control valve is installed on the anesthetic drug delivery tube; the liquid level The meter is installed on the upper side of the dosing tank; the upper end of the dosing tank is provided with an anesthetic dosing port; the small-dose supplementary anesthesia vaporizer is connected with the anesthetic dosing pipe.

The small-dose supplementary anesthesia evaporator of the utility model can realize the supply of low-concentration anesthetic drugs of 0.1-0.9%; cooperate with the front-end 0-7% integer-level anesthetic drug concentration control mechanism to realize the precise control of the anesthetic drug concentration of 0.1-0.9%, It is suitable for the integrated use of various anesthesia machines currently used in hospitals.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the utility model small dose supplementary anesthesia evaporator;

Fig. 2 is the structural representation of the drug delivery mechanism in the utility model;

Fig. 3 is the structural representation of the small dose supplementary anesthesia evaporator in the utility model;

Fig. 4 is a structural schematic diagram of the pressure compensation labyrinth ring in the utility model;

Fig. 5 is a schematic structural view of the sieve-shaped supply ring in the present invention.

Detailed ways

The small-dose supplementary anesthesia vaporizer of the present invention will be further described below in conjunction with the accompanying drawings. The accompanying drawings show a preferred embodiment of the present invention, and the present invention is not limited to this embodiment.

Referring to Fig. 1, the small dose supplementary anesthesia vaporizer 3 of the present utility model is connected with the anesthetic drug administration mechanism 1.

Referring to FIG. 2 , the drug delivery mechanism 1 of the present invention includes a drug delivery tank 11 , an anesthetic drug delivery tube 13 , a liquid level gauge 14 , an anesthetic drug injection port 15 and a drug delivery control valve 16 . The anesthetic drug administration pipe 13 is arranged on the bottom of the drug administration tank, and the liquid level gauge 14 is installed on the upper side of the drug administration tank; the upper end of the drug administration tank is provided with an anesthetic drug dosing port 15; the anesthetic drug administration pipe 13 passes through the pipeline It is connected with the small dose supplementary anesthesia vaporizer 3 , and an administration control valve 16 is installed on the anesthesia administration pipe 13 .

Referring to Fig. 3, referring to Fig. 4 and Fig. 5, the small dose supplementary anesthesia vaporizer 3 of the present invention includes an outer tank 31, an inner tank 32, an evaporation chamber 314, a porous evaporation core 33, a mixing chamber 34, a bypass pipe 35, Pressure compensating labyrinth ring 36 , sieve feed ring 37 , flow control cone 38 and temperature compensator 39 . The lower part of the outer tank is connected with the anesthetic drug delivery tube 13 of the drug delivery mechanism, the upper part of the outer tank is provided with an anesthetic drug gas input port 311 and an anesthetic drug gas output port 312, and a metal barrier collar 313 is provided in the middle of the outer tank to seal it. The inner chamber is divided into an upper chamber and a lower chamber, and the lower chamber forms an evaporation chamber 314 for accommodating anesthetic drugs; an anesthetic drug gas input port 311 is used to connect with the upper-level anesthetic drug concentration control mechanism through a pipeline; the inner tank 32 is erected In the middle of the outer tank, the lower part of the inner tank is provided with an opening and communicates with the evaporation chamber 314, and the upper part of the inner tank extends into the upper chamber through the metal barrier collar 313; Tapered structure 321 . Porous evaporating core 33 is respectively connected to the inner wall of the outer tank in the evaporation chamber and the outer wall of the inner tank; the mixing chamber 34 is arranged on the upper chamber of the outer tank, and the bottom of the mixing chamber 34 is connected to the inner tank 32 through a connecting pipe, and the left end of the mixing chamber 34 is connected to the inner tank 32. The bypass pipe 35 is connected, and the right end of the mixing chamber 34 is connected with the anesthetic gas outlet 312 through a pipe; the left end of the bypass pipe 35 is connected with the anesthetic gas inlet 311; the pressure compensation labyrinth ring 36 is arranged on the metal barrier collar Above, its upper end is connected to the anesthetic drug gas input port 311 through a pipeline, and its lower end is connected to a sieve-shaped supply ring 37 through a pipeline; the sieve-shaped supply ring 37 is arranged in the evaporation chamber; the flow control cone 38 is installed on the tank body of the outer tank and downward It extends into the inner tank 32; a temperature compensator 39 is connected in series on the bypass pipe 35; a control valve 30 is provided on the pipeline connecting the pressure compensation labyrinth ring 36 and the sieve-shaped supply ring 37.

Referring to Fig. 4, the pressure compensating labyrinth ring 36 in the utility model is an annular pipe with an opening, and a plurality of baffles 361 are arranged at intervals in the pipe, and each baffle is interlacedly connected to the inner wall and the outer wall of the pipe, effectively controlling Any pumping effect caused by pressure fluctuations is used to compensate for changes in vaporized drug concentration caused by pressure changes; one end of the pressure compensation labyrinth ring is connected to the anesthetic gas input port 311 through a connecting tube, and the other end of the pressure compensation labyrinth ring One end is connected with the sieve-shaped supply ring 37 through a connecting pipe.

Referring to Fig. 5, the sieve-shaped supply ring 37 in the utility model is a cylindrical jacket structure, which is placed between the inner wall of the outer tank and the two-layer porous evaporation core of the outer wall of the inner tank, and the inner wall and the outer wall of the sieve-shaped supply ring are respectively spaced apart. A plurality of air outlet channels 371 are provided. The air outlet channels on the outer wall of the sieve-shaped supply ring face the evaporation core on the inner wall of the outer tank, and the inner wall air outlet channels on the sieve-shaped supply ring face the evaporation core on the outer wall of the inner tank. When the total passing flow rate of the dilution gas between the evaporation cores remains unchanged, the connection form between the pressure compensation labyrinth ring and the liquid medicine evaporation core is changed to a multiple air outlet channel structure, so that the dilution gas can flow together from multiple angles. Contact with the liquid medicine can improve the flow-through strength and mixing uniformity, reduce the flow resistance, make the mixing more complete, accelerate the evaporation speed, and output the drug concentration more stable.

The porous evaporation core 33 in the utility model is a cotton braid, and two layers of porous evaporation cores are respectively placed on the inner wall of the outer tank and the outer wall of the inner tank to maximize the evaporation area in the effective space.

The temperature compensator 39 in the utility model includes a fixed valve port and a movable valve port, the fixed valve port is fixed on a metal rod with a low expansion coefficient, and the movable valve port is fixed on a metal rod 391 with a high expansion coefficient. The metal rod 391 with high expansion coefficient extends downward into the evaporation chamber, and can expand and contract with the temperature change in the evaporation chamber, thereby driving the movable valve port to move up and down, and adjusting the distance between the fixed valve port and the movable valve port , realize the adjustment of the flow rate of the anesthetic gas passing through the bypass tube, and compensate the change of the vaporized drug concentration caused by the temperature change.

The working principle of the utility model small-dose supplementary anesthesia evaporator can be described as follows in conjunction with the accompanying drawings:

The anesthetic liquid (including enflurane, desflurane, etc.) is loaded into the dosing mechanism 1, and flows from the anesthetic dosing tube 13 to the small-dosage supplementary anesthesia vaporizer 3, and is controlled with the anesthetic concentration at the front end at an integer level of 0-7%. With the cooperation of the mechanism, after the back-end anesthetic gas is supplemented with low concentration of 0.1-0.9% with high precision, it becomes the required concentration, and it is output from the anesthetic gas output port 312 and enters the breathing circuit. The entire channel is completely closed during the working process.

When the anesthetic gas flowing in from the upper-level anesthetic concentration control mechanism only needs integer-level output and no compensation is required, the control valve 30 is closed to allow the anesthetic gas to flow directly from the anesthetic gas output port 312 through the bypass pipe 35 output. When a decimal level (0.1-0.9%) supplementary output is required, the control valve 30 is opened, and the flow control cone 38 is adjusted to the required supplementary decimal level concentration, that is, after the supplementary low concentration is set, the upper level The anesthetic gas flowing in from the anesthetic concentration control mechanism is divided into two parts, one part is used as carrier gas, and enters the evaporation chamber 314 through the pressure compensation labyrinth ring 36 and the sieve-shaped supply ring 37 . The evaporation chamber is provided with a porous evaporation core 33, a part of the porous evaporation core 33 is immersed in the anesthetic liquid, and the liquid medicine rises along the fiber due to capillary action. When the carrier gas passes through it, the liquid medicine on the surface of the cotton thread evaporates rapidly, and the carrier gas passes After evaporating the chamber, gradually become saturated with anesthetic gas. The output volume of the supplementary saturated anesthetic gas is adjusted by the flow control cone 38 .

The other part of the anesthetic gas flowing in from the upper level anesthetic concentration control mechanism is drained by the bypass pipe 35, and is further fully mixed with the supplementary saturated anesthetic gas from the evaporation chamber in the mixing chamber 34, and then sent to the anesthetic gas output port 312 output. The concentration of the drug solution is controlled by 0.1-0.9% by volatilization and replenishment, so as to realize the precise control of the low concentration of the anesthetic drug concentration. Since the evaporation of the anesthetic agent is affected by temperature, it can be compensated by a temperature compensator 39. The temperature compensator 39 includes a fixed valve port and a movable valve port. The fixed valve port is fixed on a metal rod with a low expansion coefficient. The valve port is fixed on a metal rod with a high expansion coefficient; the metal rod with a high expansion coefficient extends downward into the evaporation chamber, and can expand and contract with the temperature change in the evaporation chamber, thereby driving the movable valve port to move up and down, and the adjustment does not move. The distance between the valve port and the movable valve port realizes the adjustment of the flow rate of the anesthetic gas passing through the bypass pipe.

Claims (7)

1. a low dose is replenished anesthesia evaporator, mechanism links to each other with the anesthetics administration, it is characterized in that: comprise that outer jar, interior jar, vaporization chamber, porous evaporation core, mixing chamber, bypass pipe, pressure compensation labyrinth ring, sieve shape are supplied with ring, flow-control awl and temperature compensator; Outer jar bottom links to each other with anesthetics administration mechanism, outer jar top is provided with anesthetics gas input port and anesthetics gas delivery port, outer jar centre is provided with the metal obstruct collar its inner chamber is separated into epicoele and cavity of resorption, cavity of resorption is formed for the vaporization chamber of ccontaining anesthetics, interior jar is erected in the middle of outer jar, interior jar bottom is provided with uncovered and is communicated with vaporization chamber, and interior jar top is passed the metal obstruct collar and stretched into intracavity; The porous evaporation core divides two layers of placement, is connected to outer jar of inwall and interior tank wall in the vaporization chamber; Mixing chamber is arranged on outer jar epicoele, and the bottom of mixing chamber linked to each other with interior jar by communicating pipe, and the left end of mixing chamber links to each other with bypass pipe, and the right-hand member of mixing chamber links to each other with the anesthetics gas delivery port by pipeline; The left end of bypass pipe links to each other with the anesthetics gas input port; The pressure compensation labyrinth ring is arranged on the top that metal intercepts the collar, and its upper end links to each other with the anesthetics gas input port by pipeline, and the lower end is supplied with ring by pipeline with sieve shape and linked to each other; Sieve shape supply ring is arranged in the vaporization chamber and is placed between the porous evaporation core of outer jar inwall and interior tank wall; Outside being installed in, the flow-control awl also stretches into interior jar downwards on the tank body of jar; Temperature compensator is connected on the bypass pipe; Supply with on the pipeline that ring links to each other pressure compensation labyrinth ring and sieve shape and to be provided with control valve.

2. low dose as claimed in claim 1 is replenished anesthesia evaporator, it is characterized in that: described pressure compensation labyrinth ring is the circulating line of a band opening, is interval with the polylith baffle plate in the pipeline, and each baffle plate is cross-linked the inner and outer wall at pipeline.

3. low dose as claimed in claim 1 is replenished anesthesia evaporator, it is characterized in that: it is jacket structured for cylindrical shape that described sieve shape is supplied with ring, and the inner and outer wall of supplying with ring sieve shape is interval with a plurality of ducts of giving vent to anger respectively.

4. low dose as claimed in claim 1 is replenished anesthesia evaporator, it is characterized in that: described porous evaporation core is the cotton thread fabric.

5. low dose as claimed in claim 1 is replenished anesthesia evaporator, it is characterized in that: described temperature compensator comprises a motionless valve port and movable valve port, motionless valve port is fixed on the low-expansion metallic rod, and movable valve port is fixed on the metallic rod of a high expansion coefficient; The metallic rod of high expansion coefficient stretches in the vaporization chamber downwards, and can telescopic variation take place with the variations in temperature in the vaporization chamber, thereby drive activity valve port moves up and down, and regulates the spacing size between motionless valve port and the movable valve port.

6. low dose as claimed in claim 1 is replenished anesthesia evaporator, it is characterized in that: jar top is provided with and the adaptive pyramidal structure of flow-control awl in described.

7. low dose as claimed in claim 1 is replenished anesthesia evaporator, it is characterized in that: described administration mechanism comprises administration groove, anesthetics delivery tube and liquidometer; The anesthetics delivery tube is arranged on the bottom of administration groove, and the administration control valve is installed on the anesthetics delivery tube; Liquidometer is installed in the upper side of administration groove; Be provided with the anesthetics dosing mouth in the upper end of administration groove; Described low dose is replenished anesthesia evaporator and is linked to each other with the anesthetics delivery tube.

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