KR100770584B1 - System for absorbing carbon dioxide gas used in anesthesia apparatus - Google Patents

Abstract

The present invention relates to a carbon dioxide gas absorption system for use in anesthesia, the system having an outer cylinder, an inner cylinder and a support of a transparent material. The inner cylinder is inserted in the outer cylinder to provide a ring-shaped first space between the outer cylinder and laterally, and a second space is provided in the inner cylinder. At the bottom of the inner cylinder is provided a porous plate with holes formed throughout the face. The carbon dioxide absorbent is placed on the porous plate and disposed in the second space. Below the porous plate is provided a cylindrical buffer space connected to the first space. The support has an inlet port connected to the first space and an outlet port connected to the second space. Due to the structure described above, the gas discharged from the patient and introduced into the system through the inflow port flows downward along the first space and then flows into the buffer space, and then flows upward along the second space. The carbon dioxide is removed from the gas by the carbon dioxide absorbent disposed in the second space, and then the gas is sent to the patient's lung through the outlet port.

Anesthesia, carbon dioxide absorber, soda lime, canister

Description

CO2 absorption system used for anesthesia {SYSTEM FOR ABSORBING CARBON DIOXIDE GAS USED IN ANESTHESIA APPARATUS}

1 is a perspective view of an anesthetic equipped with a carbon dioxide gas absorption system of the present invention;

2 is a perspective view of the carbon dioxide gas absorption system of FIG.

3 is a perspective view of the support of FIG.

4 is a perspective view cut longitudinally of the canister of FIG. 2;

5 is a top view of the canister;

6 is a cross-sectional view of the canister; And

7 shows the flow of gas in the canister.

Explanation of symbols on the main parts of the drawings

60 carbon dioxide gas absorption system 100 support

120: support plate 122: inlet port

124: outlet port 140: sealing plate

142: outer plate 144: inner plate

160: jam jaw 200: canister

220: outer cylinder 228: fixing protrusion

240: inner cylinder 260: porous plate

280: separating member 290: pedestal

320: first space 340: second space

360: buffer space 400: carbon dioxide gas absorbing material

The present invention relates to a medical device, and more particularly to a carbon dioxide absorption system used for general anesthesia.

General anesthesia is used to anesthetize a patient before surgery in a hospital. The general anesthesia machine is equipped with a carbon dioxide absorption system that removes only carbon dioxide from the gas discharged from the patient's body and then injects the remainder back into the patient. In general, the carbon dioxide absorption system has a support connected to the respiratory conduit and a canister in which carbon dioxide is removed. The canisters have lower and upper cylinders stacked on each other. An opening is formed in the center of the lower surface of the upper and lower cylinders, and a plate having a plurality of holes is inserted into the opening. A carbon dioxide absorbent is placed on the lower surface of the lower passage and the upper passage.

The gas exiting the patient flows down along the conduit installed outside the canister and then sequentially from the bottom up along the plate and carbon dioxide absorber provided in the lower cylinder, and the plate and carbon dioxide absorber provided in the upper cylinder. Carbon dioxide is removed from the gas while the gas passes through the carbon dioxide absorbent. Soda lime is mainly used as a carbon dioxide absorber. Soda lime is gradually colored purple as it absorbs carbon dioxide, so the user decides when to replace soda lime according to the degree of change in the color of the soda lime.

The use of the general canister described above has the following problems.

Since the plate is provided at a position facing only the central portion of the carbon dioxide absorbent, absorption of the carbon dioxide is mainly performed only in the central region of the carbon dioxide absorbent. Therefore, the lifetime of the carbon dioxide absorbent is short.

In addition, even when the life span of the carbon dioxide absorbent in the central region is exhausted, the edge region of the carbon dioxide absorber is not colored purple, so it is difficult to visually check whether the carbon dioxide absorber has reached the end of its life. Therefore, the replacement timing of the carbon dioxide absorbent can be confirmed after removing the canister from the support.

In addition, the gas discharged from the patient is introduced into the lower barrel through a conduit having a narrow passage, so that the patient's breathing is not easy.

An object of the present invention is to provide a carbon dioxide gas absorption system having a structure that can easily check the replacement time of the carbon dioxide absorber.

In addition, an object of the present invention is to provide a carbon dioxide gas absorption system having a structure that can extend the life of the carbon dioxide absorber.

In addition, an object of the present invention is to provide a carbon dioxide gas absorption system having a structure that allows the gas discharged from the patient to flow smoothly to facilitate the breathing of the patient.

The present invention provides a carbon dioxide gas absorption system for use in anesthesia. According to one feature of the invention, the carbon dioxide gas absorption system has an inner cylinder and an outer cylinder, and has a canister for removing carbon dioxide gas from the gas discharged from the patient, and a support that supports it and engages with the respiratory conduit. The inner cylinder has a second space inserted into the outer cylinder and placed therein with a carbon dioxide absorbent material to provide a first space between the outer cylinder and laterally. The support has an inlet port connected to the first space and an outlet port connected to the second space, and a respiratory conduit is coupled to the inlet port and the outlet port. Due to the above-described structure, the gas discharged from the patient flows through the first space provided between the outer cylinder and the inner cylinder instead of the conduit provided separately, so that the area of the passage through which the gas flows is wide so that the patient can easily breathe.

According to another feature of the present invention, a porous plate on which the carbon dioxide absorber is placed is disposed at a lower end of the second space, and holes are formed in the porous plate through which gas flows on the entire surface on which the carbon dioxide absorber is placed. The holes formed in the porous plate may be provided in various shapes such as a circle or a slit. The holes may be densely formed or formed in different sizes depending on the formation region. Due to the structure described above, since a uniform amount of gas passes through the central region and the edge region of the carbon dioxide absorber, the carbon dioxide gas is absorbed in both the central region and the edge region of the carbon dioxide absorber. Therefore, the lifetime of the carbon dioxide absorber is long.

According to another feature of the invention, both the inner cylinder and the outer cylinder is made of a transparent material, the carbon dioxide gas absorber is used a material that changes color depending on the amount of carbon dioxide absorbed. Since the carbon dioxide is absorbed substantially uniformly in the entire region of the carbon dioxide absorber, the color change is substantially the same in the entire region of the carbon dioxide absorber. Therefore, the replacement timing of the carbon dioxide absorbent can be easily inspected without separating the canister from the support.

According to another feature of the present invention, a separating member is provided in the first space so that the inner cylinder and the outer cylinder do not come in lateral contact. This allows the first space to be maintained in a ring shape, allowing a generally uniform amount of gas to pass through the entire region of the carbon dioxide absorber. Preferably, the separating member extends from the side wall of the inner cylinder or the outer cylinder to protrude into the first space. This can simplify the configuration compared to providing a separate member separately.

According to still another feature of the present invention, a pedestal for supporting the inner cylinder is provided in the outer cylinder to form a buffer space under the second space. The pedestal may be provided to protrude upward from the bottom wall of the outer cylinder or may protrude downward from the bottom of the side wall of the inner cylinder. The plurality of pedestals are provided to be spaced apart from each other so that the first space and the buffer space communicate with each other.

According to another feature of the invention, the outer cylinder has at least one fixing projection protruding laterally at its upper end, the support has a locking jaw for supporting the fixing projection on its lower surface. A space into which the fixing protrusion is inserted is provided between the locking jaw and the lower surface of the support, and the fixing protrusion is inserted into the space by the rotation of the outer cylinder. Due to the structure described above, the operator can fix the canister to the support by rotating the outer cylinder so that the fixing protrusion is inserted into the space, so that the canister and the support are easily coupled.

Hereinafter, exemplary embodiments of the present invention will be described in more detail with reference to FIGS. 1 to 7. The embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be interpreted as being limited by the embodiments described below. This example is provided to more completely explain the present invention to those skilled in the art. Accordingly, the shape of the elements in the drawings may be exaggerated for clarity.

1 is a perspective view of a general anesthesia machine 1 equipped with a carbon dioxide gas absorption system 60 of the present invention. Referring to FIG. 1, an anesthesia apparatus 1 includes a body 10, a vaporizer 20, a flow meter 30, and an artificial respirator 40. And a system for absorbing carbon dioxide gas (60). The body 10 has a lower body 12 and an upper body 14. The lower body 12 has a generally rectangular parallelepiped shape. The upper body 14 is provided to extend upward from the rear half of the upper surface of the lower body 12. Wheel 16 may be installed on the bottom surface of the body 10 to facilitate the movement of the body 10.

The vaporizer | carburetor 20 and the flowmeter 30 are provided in the front surface of the lower body 12. As shown in FIG. The vaporizer 20 is used to evaporate certain volatile anesthetics, and the flow meter 30 is used to measure or control the amount of oxygen and nitrous oxide injected into the patient. The anesthetic gas evaporated in the vaporizer 20 is injected into the patient's lung through the carbon dioxide gas absorption system 60 together with oxygen and nitrous oxide at a constant concentration.

On the side wall of the upper body 14 is equipped with a ventilator 40 to artificially control the breathing during the operation to inject oxygen into the lungs, the upper part of the upper body 14, the ventilator control for controlling the ventilator 40 The device 50 is installed.

A respiratory conduit (not shown) is provided as a passage that sends anesthesia gas to the patient's lungs and also sends gas from the patient back to the anesthesia 1. The respiratory tract has an intake tract through which gas is sent to the patient and an expiratory duct through which the gas exits the patient. Gases injected into the patient's lungs and then discharged out of the body include air containing anesthesia gas and carbon dioxide gas. The gas other than the carbon dioxide gas is discharged back to the patient. The carbon dioxide gas absorption system 60 removes carbon dioxide gas from the gas discharged to the outside of the patient, and further contains a certain amount of anesthetic gas in the remaining gas. The carbon dioxide gas absorption system 60 is fixed to the body 10 by the coupling rod 62.

Hereinafter, the carbon dioxide gas absorption system 60 will be described in detail.

2 is a perspective view of a carbon dioxide gas absorption system 60 according to a preferred embodiment of the present invention, Figure 3 is a perspective view of the support 100, Figure 4 is a canister 200 to show the interior of the canister 200 ) Is a perspective view cut in the longitudinal direction. 2 and 3, the system 60 has a supporter 100 and a canister 200. The support 100 has a support plate 120 having a generally rectangular plate shape and a sealing plate 140 protruding downward from the bottom surface thereof. The support plate 120 has an inlet port 122 coupled with the respiratory tract of the respiratory conduit to introduce the gas discharged from the patient and an outlet port 124 coupled with the inlet duct of the respiratory conduit to send anesthesia gas to the patient's lungs. Have In addition, the support plate 120 is provided with a port 126 to which a conduit (not shown) through which anesthetic gas generated from the vaporizer 20 flows is connected. The sealing plate 140 has a disc shaped outer plate 142 and a disc shaped inner plate 144 extending downward therefrom. The inner plate 144 has a smaller diameter than the outer plate 142 and extends down from the center of the outer plate 142. Sides of each of the outer plate 142 and the inner plate 144 are provided with a groove into which the O-ring 146 is inserted.

 Referring to FIG. 4, the canister 200 has an outer cylinder 220, an inner cylinder 240, and a porous plate 260. The outer cylinder 220 has a cylindrical shape provided with a space that is open at the top. The inner cylinder 240 has a cylindrical shape provided with a space in which the upper and lower portions are opened. The inner cylinder 240 and the outer cylinder 220 are each made of a transparent material, and the inner cylinder 240 is inserted into the outer cylinder 220. The outer diameter of the inner cylinder 240 is provided smaller than the inner diameter of the outer cylinder 220, so that a space is formed laterally between the outer cylinder 220 and the inner cylinder 240 when the inner cylinder 240 is inserted into the outer cylinder 220. The inner cylinder 240 is shorter in the vertical direction than the outer cylinder 220 so that the inner cylinder 240 is completely inserted into the outer cylinder 220. Hereinafter, the space provided between the inner cylinder 240 and the outer cylinder 220 is referred to as a first space 320 of FIG. 6, and the space provided in the inner cylinder 240 is referred to as a second space 340 of FIG. 6.

The carbon dioxide gas absorbing material 400 is inserted into the second space 340 of the inner cylinder 240. The carbon dioxide absorbing material 400 of FIG. 7 has a diameter similar to the diameter of the second space 340. The carbon dioxide absorbent 400 is used to absorb carbon dioxide gas from the gas discharged from the patient. The carbon dioxide absorbing material 400 is a material whose color changes as the amount of carbon dioxide absorbed increases. The replacement time of the carbon dioxide absorbent 400 is determined according to the color change of the carbon dioxide absorbent 400. For example, a soda lime, a milky white porous granular material, may be used as the carbon dioxide absorbent 400, and the soda lime is colored purple as the amount of carbon dioxide gas is increased.

The porous plate 260 is disposed at the lower end of the inner cylinder 240. The porous plate 260 supports the carbon dioxide absorbing material 400. The porous plate 260 is formed with holes 262 through which gas is introduced into the carbon dioxide gas absorber 400 from the buffer space 360. The porous plate 260 has a diameter similar to that of the carbon dioxide absorbent 400, and the holes 262 are formed over the entire surface. The holes 262 may be provided in a circular shape or a slit, and may be provided in various shapes differently. In addition, the holes 262 may be provided at even intervals and even sizes throughout the surface of the porous plate 260, and may optionally be provided at different intervals and different sizes depending on the area.

5 is a plan view of the canister 200, and FIG. 6 is a cross-sectional view of the canister 200. 5 and 6, a separation member 280 is provided in the first space 320 to prevent the inner cylinder 240 and the outer cylinder 220 from contacting in the lateral direction. This allows the first space 320 to be maintained in an annular ring shape. According to an example, the separating member 280 may extend to protrude outward from the side wall 242 of the inner cylinder 240. Separation member 280 is formed long in the longitudinal direction from the upper end to the lower end of the side wall 242 of the inner cylinder 240, a plurality is provided around the side wall 242 at uniform intervals. Optionally, the separating member 280 may extend to protrude inwardly from the side wall 222 of the outer cylinder 220 or may be provided in the first space 320 as a separate object.

Referring back to FIG. 6, a pedestal for supporting the inner cylinder 240 and the porous plate 260 under the inner cylinder 240 such that the buffer space 360 is provided under the second space 340 in the outer cylinder 220. 290 is provided. Pedestal 290 extends downwardly from the bottom of the side wall of the inner cylinder 240 or extends upwardly from the lower wall 224 of the outer cylinder 220 to support the inner cylinder 240, the end of which protrudes in a certain distance inwardly. To support the porous plate 260. Pedestal 290 may be provided integrally with the separation member 280 described above. A plurality of pedestals 290 are arranged at equal intervals, and passages are provided between the pedestals 290 so that the first space 320 and the buffer space 360 pass through.

The canister 200 is fixed to the support 100. Fixing protrusions 228 protruding outwardly are provided at an upper end of the side wall of the outer cylinder 220. Fixing protrusions 228 are arranged at equal intervals, three to six may be provided. Referring to FIG. 3 again, a plurality of locking jaws 160 are installed on the lower surface of the support plate 120 of the support 100. The locking jaw 160 is provided in plural to correspond to the fixing protrusions 228 around the outer plate 142. Each locking jaw 160 has an outer wall 164 coupled to the lower surface of the support plate 120, a pedestal 162 extending inwardly therefrom, and a space provided between the pedestal 162 and the lower surface of the support plate 120. It has a side wall 166 blocking one side. Therefore, in the above-described space, the surface facing inward and the surface facing the other side are opened. The combination of the canister 200 and the support 100 is such that the outer cylinder 220 is in close contact with the support plate 120 until the fixing protrusion 228 is inserted into the space provided between the locking jaw 160 and the support plate 120. It is made by rotating the outer cylinder 220 in the direction toward the other open side of the space.

When the canister 200 is coupled to the support 100, the outer plate 142 of the support 100 is inserted into the first space 320 of the canister 200, and the inner plate 144 of the support 100 is canister It is inserted into the second space 340 of the (200), blocking the open upper portion of the first space 320 and the second space (340). The O-ring 146 provided on the side of the outer plate 142 and the inner plate 144 seals the first space 320 and the second space 340 from the outside. In the support 100, a passage 182 connecting the inlet port 122 and the first space 320 of the support 100 and the outlet port 124 of the support 100 and the second space 340 are connected. A passage 184 is formed.

7 is a diagram illustrating a gas flow path in the canister 200. Referring to FIG. 7, the gas discharged from the patient is introduced into the first space 320 through the inlet port 122 of the support 100. The gas flows down along the first space 320 and then flows inwardly through the passage provided between the pedestals 290 to enter the buffer space 360. Gas is introduced into the second space 340 through the holes 262 formed in the porous plate 260. In the second space 340, the gas flows upwardly and passes through the carbon dioxide absorbent 400, and the carbon dioxide absorbent 400 removes carbon dioxide from the gas. Thereafter, after a certain amount of anesthetic gas is further contained in the gas in the support 100, the gas is sent to the patient's lung through the outlet port 124.

Due to the structure described above, the amount of gas passing through the central region and the edge region of the carbon dioxide absorber 400 is generally similar. Therefore, as the use period elapses, the color of the carbon dioxide absorbing material 400 changes uniformly as a whole. Therefore, the user can easily check the replacement time of the carbon dioxide gas absorbing material 400 from the outside of the canister 200 without separating the canister 200 from the support 100.

In addition, since the gas discharged from the patient flows along the first space 320 provided in a ring shape and then flows into the buffer space 360, the gas flows into only one side of the buffer space 360. 360) A uniform amount of gas enters the entire area.

In the above-described embodiment, the case in which one carbon dioxide absorbent 400 is provided in the inner cylinder 240 has been described as an example. Alternatively, however, one or more porous plates 260 may be further provided in the inner cylinder 240, and the carbon dioxide absorbent 400 may be placed on each of them.

According to the present invention, since the gas passes substantially uniformly through the central region and the edge region of the carbon dioxide absorber, the carbon dioxide is absorbed in the entire region of the carbon dioxide absorber, thereby extending the life of the carbon dioxide absorbent.

In addition, according to the present invention, since the carbon dioxide is absorbed substantially uniformly in the central region and the edge region of the carbon dioxide absorber, the color of the carbon dioxide absorber is substantially changed in the central region and the edge region. Therefore, the replacement timing of the carbon dioxide absorbent can be easily confirmed without removing the canister from the support.

In addition, according to the present invention, since the gas discharged from the patient flows through the first space provided between the outer cylinder and the inner cylinder instead of the conduit, the gas flowing area is easy for the patient to breathe, to provide a separate conduit The structure of the system is simple because there is no need.

Further, according to the present invention, the canister can be fixed to the support by rotating the outer cylinder so that the fixing projection of the outer cylinder is inserted into the space provided on the locking jaw of the support, so that the canister and the support are easily coupled.

Claims (12)

In the carbon dioxide absorption system used for anesthesia External passage; An inner passage inserted into the outer cylinder so as to provide a first space between the outer passage in the lateral direction, the inner passage providing a second space communicating with the first space and having a carbon dioxide gas absorber disposed therein; An inflow port communicating with the first space and inflowing gas into the first space and an outlet port communicating with the second space and discharging gas passing through the carbon dioxide absorber to the outside, and disposed above the outer cylinder A support for supporting the outer cylinder; A porous plate provided at a lower end of the second space so as to support the carbon dioxide absorber in the entire area where the carbon dioxide absorbent is placed, and the holes being formed so that gas flows through the entire surface where the carbon dioxide absorbent is placed; ; And a pedestal for supporting the inner cylinder such that a buffer space communicating with the first space is provided below the second space within the outer cylinder. The method of claim 1, The outer cylinder has at least one fixing protrusion protruding laterally at the top, The support is provided with locking jaws for supporting the fixing projections on the lower surface, The locking jaw provides a space in which the fixing protrusion is inserted between the lower surface of the support, and the carbon dioxide gas absorption system is characterized in that the fixing protrusion is inserted into the space by the rotation of the outer cylinder. . The method according to claim 1 or 2, And the system further comprises a separating member provided in the first space such that the side wall of the inner cylinder and the side wall of the outer cylinder do not contact each other. The method of claim 3, wherein And the separating member extends from a side wall of the inner cylinder or the outer cylinder. delete The method according to claim 1 or 2, The pedestal extends from the inner cylinder or the outer cylinder, characterized in that carbon dioxide gas absorption system. The method according to claim 1 or 2, The carbon dioxide absorbing material is a carbon dioxide gas absorption system, characterized in that the material is changed in color depending on the amount of carbon dioxide absorbed. The method of claim 7, wherein The inner cylinder and the outer cylinder is carbon dioxide gas absorption system, characterized in that made of a transparent material. delete In the carbon dioxide gas absorption system used for anesthesia, Outer passage of transparent material; An inner passage of a transparent material inserted into the outer cylinder; A carbon dioxide gas absorber positioned in the inner cylinder and absorbing carbon dioxide gas; And A support having an inlet port and an outlet port coupled to the outer cylinder and connected to the respiratory tract; The inner cylinder is disposed in the outer cylinder to provide a ring-shaped first space between the outer cylinder and laterally and to provide a cylindrical buffer space in communication with the first space between the lower wall of the outer cylinder, It has a second space in which the carbon dioxide absorbing material is placed, The second space is provided with a porous plate for supporting the carbon dioxide gas absorbing material in the entire area on which the carbon dioxide absorbing material is placed, Carbon dioxide gas absorption, characterized in that the gas flow holes are formed in the entire surface of the porous plate on which the carbon dioxide gas absorber is placed so that gas flowing through the porous plate to the carbon dioxide gas absorber passes through the entire region of the carbon dioxide gas absorber. system. The method of claim 10, The outer cylinder has at least one fixing protrusion protruding laterally at the top, The lower surface of the support is provided with locking jaws for supporting the fixing projections, The locking jaw provides a space in which the fixing protrusion is inserted between the lower surface of the support, and the carbon dioxide gas absorption system is characterized in that the fixing protrusion is inserted into the space by the rotation of the outer cylinder. . The method according to claim 10 or 11, wherein The system further includes a separating member provided in the first space to prevent the side wall of the inner cylinder and the side wall of the outer cylinder contact each other, And the separating member is formed to extend from a side wall of the inner cylinder or the outer cylinder.

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