CN111182937B - Anesthesia machine and loop drainage device thereof - Google Patents
Anesthesia machine and loop drainage device thereof Download PDFInfo
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- CN111182937B CN111182937B CN201780095156.4A CN201780095156A CN111182937B CN 111182937 B CN111182937 B CN 111182937B CN 201780095156 A CN201780095156 A CN 201780095156A CN 111182937 B CN111182937 B CN 111182937B
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- valve
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- carbon dioxide
- absorption tank
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/01—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes specially adapted for anaesthetising
Abstract
A loop drainage device of an anesthesia machine is used for draining condensed water of a breathing loop of the anesthesia machine when a carbon dioxide absorption tank (9) is replaced, and comprises a ponding containing cavity (10) provided with a first valve port (14 a) and a second valve port (14 b); the first valve port (14 a) is communicated with the breathing circuit; the second valve port (14 b) is communicated with the carbon dioxide absorption tank (9); a drain valve (14) having a first state and a second state; when the drain valve (14) is in the first state, the drain valve (14) blocks the ponding cavity (10) to collect condensate water of the breathing circuit; when the drain valve (14) is in the second state, the drain valve (14) conducts the water accumulation containing cavity (10) to discharge condensed water in the water accumulation containing cavity (10) into the carbon dioxide absorption tank (9); and a trigger device for switching the drain valve (14) between the first state and the second state when the carbon dioxide absorption tank (9) is removed and installed.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to an anesthesia machine and a loop drainage device thereof.
Background
In the anesthesia operation, the anaesthetist uses the anesthesia machine to do the anesthesia in-process for the patient, along with breathing action, patient's breathing can produce moisture to can produce a large amount of water after carbon dioxide in the patient's exhaling gas reacts with soda lime, can produce the comdenstion water in the return circuit easily, especially expiration flow sensor rear end, this phenomenon is more obvious.
Excessive condensed water remained in the loop can affect components such as a gas flow sensor, an oxygen concentration sensor and the like, so that the measured data is inaccurate; moreover, a large amount of condensed water accumulates in the breathing circuit, which causes a large breathing resistance.
At present, a water collecting cup or a condenser is usually arranged on a loop to collect the condensed water of the expiration branch, however, the water collecting cup needs to be detached or a button on the condenser needs to be pressed for periodic drainage. Medical personnel forget the comdenstion water in the clear ponding cup easily, and lead to long-term the amasss in the return circuit to have a large amount of comdenstion water, except bringing serious influence for ventilating and monitoring, still breed the bacterium easily, bring the risk for patient's health.
Disclosure of Invention
In view of the above, the present invention aims to provide an anesthesia apparatus and a circuit drainage device thereof, which can drain condensed water when a carbon dioxide absorption tank is attached and detached.
In one aspect, an embodiment of the present application further provides a circuit drainage device for draining condensed water of a breathing circuit of an anesthesia machine when a carbon dioxide absorption tank is disassembled and assembled, the circuit drainage device including:
a water discharge passage communicating with the carbon dioxide absorption tank;
the water accumulation accommodating cavity and the drain valve are arranged on the drain passage;
the drain valve has a first state and a second state; when the drain valve is in the first state, the drain valve blocks a passage between the water accumulation cavity and the carbon dioxide absorption tank so that condensed water of the breathing circuit is stored in the water accumulation cavity; when the drain valve is in the second state, the drain valve conducts a passage between the accumulated water containing cavity and the carbon dioxide absorption tank so as to discharge condensed water in the accumulated water containing cavity into the carbon dioxide absorption tank; and
and the triggering device is used for switching the drain valve from the first state to the second state when the carbon dioxide absorption tank is detached.
In another aspect, an embodiment of the present application further provides a circuit drainage device for draining condensed water of a breathing circuit of an anesthesia machine when a carbon dioxide absorption tank is detached, the circuit drainage device including:
a water discharge passage communicating with the carbon dioxide absorption tank;
the water accumulation cavity is arranged on the drainage passage and comprises a first part and a second part, and the first part is communicated with the breathing loop;
the drain valve is arranged on the drain passage and has a first state and a second state; wherein when the drain valve is in the first state, the drain valve blocks the passage between the first portion and the second portion and conducts the passage between the second portion and the carbon dioxide absorption tank; when the water discharge valve is in the second state, the water discharge valve opens the passage between the first portion and the second portion and blocks the passage between the second portion and the carbon dioxide absorption tank; and
a trigger device for switching the drain valve from the first state to the second state when the carbon dioxide absorption tank is detached; and switching the drain valve from the second state to the first state when the carbon dioxide absorption tank is loaded.
In another aspect, an embodiment of the present application provides an anesthesia machine including the above-mentioned loop drainage device.
According to the anesthesia machine and the loop drainage device thereof, the drainage valve used for adjusting the ponding containing cavity to collect the condensed water and drain the condensed water in the loop drainage device is controlled by the trigger device, and the trigger device only enables the drainage valve to act when the carbon dioxide absorption tank is disassembled and assembled, so that the condensed water in the breathing loop is drained into the carbon dioxide absorption tank when the carbon dioxide absorption tank is disassembled and assembled, and the condensed water is treated together when the soda lime in the carbon dioxide absorption tank is cleaned, so that the operation is simple and convenient.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings of the embodiments can be obtained according to the drawings without creative efforts.
FIG. 1 is a diagram of an anesthesia machine breathing circuit in accordance with one embodiment of the present invention;
FIG. 2 is a diagram of a breathing circuit in which a bypass valve opens a branch of an absorption canister when the carbon dioxide absorption canister is installed in accordance with an embodiment of the present invention;
FIG. 3 is a diagram of a breathing circuit in which a bypass valve opens a bypass branch when the carbon dioxide absorption canister is removed according to an embodiment of the present invention;
FIG. 4 is a schematic view of a shut-off state of a drain passage according to an embodiment of the present invention;
FIG. 5 is a schematic view of the conducting state of the drain passage according to an embodiment of the present invention;
FIG. 6 is a schematic structural view of a drain valve blocking the drain path to allow the water accumulation cavity to store condensed water in accordance with an embodiment of the present invention;
FIG. 7 is a schematic structural diagram illustrating the drain valve according to an embodiment of the present invention conducting the drain path to drain the condensed water in the water-collecting chamber;
FIG. 8 is a diagram illustrating the state of the drain path when the water accumulation chamber stores condensed water when the carbon dioxide absorption tank is installed in the embodiment of the present invention;
FIG. 9 is a state diagram of a water discharge passage when the carbon dioxide absorption tank is removed and condensed water is discharged into the carbon dioxide absorption tank in the embodiment of the present invention;
FIG. 10 is a schematic view showing the configuration of a drain valve in a first state when a carbon dioxide absorption tank is installed in an embodiment of the present invention;
FIG. 11 is a schematic view showing the configuration of a drain valve for sealing a drain path and draining condensed water into a carbon dioxide absorption canister when the carbon dioxide absorption canister is removed according to the embodiment of the present invention;
FIG. 12 is a state diagram of a circuit in which a first portion of the water accumulation volume stores condensate and a second portion of the water accumulation volume drains into the carbon dioxide absorption canister when the carbon dioxide absorption canister is installed in an embodiment of the present invention;
FIG. 13 is a circuit diagram of a first portion of the water collection chamber having condensed water drained into a second portion of the water collection chamber with the drain valve in a second state and sealing the drain passage when the carbon dioxide absorption canister is removed in accordance with an embodiment of the present invention;
FIG. 14 is a schematic view showing a configuration of a drain valve when condensed water is drained into a carbon dioxide absorption tank when the carbon dioxide absorption tank is installed in an embodiment of the present invention;
FIG. 15 is a schematic view showing a structure of a drain valve for sealing a drain path when the carbon dioxide absorption tank is removed in accordance with the embodiment of the present invention;
FIG. 16 is a schematic view of the combination of the drainage passage and the suction branch according to another embodiment of the present invention;
FIG. 17 is a schematic view of the combination of the drainage channel and the air suction branch according to still another embodiment of the present invention.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments. Further, the terms "upstream" and "downstream" as used herein refer to the positional relationship of the fluid in the process of flowing through; specifically, the position where the flow passes first is referred to as "upstream", and the position where the flow passes later is referred to as "downstream".
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, an anesthesia apparatus provided by an embodiment of the present invention has a breathing circuit including an inspiration branch, an expiration branch and an absorption tank branch.
Specifically, the inspiration branch comprises an inspiration interface 3, an inspiration flow sensor 5 and an inspiration one-way valve 7, one end of the inspiration branch is communicated with the patient pipeline 2, and the other end of the inspiration branch is communicated with the fresh air interface 11 and the absorption tank branch. The inspiration flow sensor 5 is positioned between the inspiration interface 3 and the inspiration one-way valve 7, so that during inspiration phase, the inspiration flow sensor 5 can monitor inspiration flow; during the expiration phase, the inspiration check valve 7 is forced to close by the expiration pressure of the patient 1, so that the expired gas of the patient 1 can only flow to the expiration branch.
The expiration branch comprises an expiration interface 4, an expiration flow sensor 6 and an expiration one-way valve 8, one end of the expiration branch is communicated with the patient pipeline 2, and the other end of the expiration branch is communicated with the driving gas interface 12 and the absorption tank branch. The expiratory flow sensor 6 is located between the expiratory interface 4 and the expiratory check valve 8, so that during the expiratory phase, the expiratory flow sensor 6 can monitor the flow of gas exhaled by the patient 1. The drive air connection 12 is connected to a drive device (not shown) into which the gas exhaled by the patient 1 can flow via an exhalation limb.
In the above embodiment, the carbon dioxide absorption tank 9 is provided in the absorption tank branch. Specifically, an absorption tank branch 9a is led out between the inspiration one-way valve 7 and the fresh air interface 11 and is communicated with the carbon dioxide absorption tank 9, and an absorption tank branch 9b is led out between the expiration one-way valve 8 and the driving air interface 12 and is communicated with the carbon dioxide absorption tank 9. At this time, during the expiration phase, fresh gas carrying anesthetic gas and oxygen flows from the fresh gas interface 11 through the canister branch 9a, the carbon dioxide canister 9 and the canister branch 9b, and flows to the driving device through the driving gas interface 12 together with the gas exhaled by the patient 1. In the inspiration phase, the driving device drives the mixture gas containing the gas exhaled by the patient 1 and the fresh gas to enter from the driving gas interface 12, and the exhalation one-way valve 8 is closed under the action of the driving gas pressure; the mixed gas flows through the absorption tank branch 9b, the carbon dioxide absorption tank 9 and the absorption tank branch 9a, then flows through the inspiration one-way valve 7, the inspiration flow sensor 5 and the inspiration interface 3 together with the fresh gas flowing in from the fresh gas interface 11, finally flows through the patient pipeline 2 and enters the patient 1, and a breathing cycle is completed.
In the above embodiment, due to the soda lime contained in the carbon dioxide absorption tank 9, when the mixed gas flows through the carbon dioxide absorption tank 9, the soda lime reacts with the carbon dioxide exhaled by the patient in the mixed gas to generate water and heat, so that the carbon dioxide in the mixed gas is eliminated, and the mixed gas is humidified and heated to make the patient feel more comfortable when inhaling.
As shown in fig. 2, canister leg 9a is connected to the inspiratory leg through canister leg 9c via bypass valve 13a, and canister leg 9b is connected to the expiratory leg through canister leg 9d via bypass valve 13 b. A bypass branch 13c is provided between the bypass valve 13a and the bypass valve 13 b. When the carbon dioxide absorption tank 9 is installed, the carbon dioxide absorption tank 9 drives the bypass valve 13a to conduct the absorption tank branch 9a and the absorption tank branch 9c and drives the bypass valve 13b to conduct the absorption tank branch 9b and the absorption tank branch 9d by the drive mechanism 9e, so that the mixed gas flows through the carbon dioxide absorption tank 9.
Referring to fig. 3, when the carbon dioxide absorption tank 9 is detached, the resetting device drives the carbon dioxide absorption tank bypass valve 13a and the carbon dioxide absorption tank bypass valve 13b to be located at another working position, namely, the absorption tank branch 9d and the absorption tank branch 9c are communicated through the bypass branch 13c, so that ventilation can still be performed during replacement of soda lime in the operation process.
Referring to fig. 4 and 5, a loop drainage device is provided in the expiratory limb to drain the condensed water from the expiratory limb of the anesthesia apparatus when the carbon dioxide absorption tank 9 is removed. The loop drainage device comprises a drainage passage, a water accumulation cavity 10, a drainage valve 14 and a trigger device. The water drainage channel is connected between the expiration branch and the carbon dioxide absorption tank 9, specifically, a bypass can be led out between the expiration flow sensor 6 and the expiration one-way valve 8 and is communicated with the water drainage channel; and the condensed water can be bypassed through the drain passage.
It can be understood that the water accumulation cavity 10 and the drain valve 14 are arranged on the drain passage, and the drain valve 14 controls the opening and closing of the drain passage, so that the water accumulation cavity 10 collects the condensed water of the expiration branch or discharges the condensed water into the carbon dioxide absorption tank 9. In this embodiment, since the triggering device can trigger the drain valve 14 to switch between two states (hereinafter referred to as a first state and a second state) to control the blocking or conducting of the drain passage when the carbon dioxide absorption tank 9 is assembled and disassembled, the water accumulation cavity 10 can store condensed water or drain the condensed water, so as to drain the condensed water of the expiratory branch when the carbon dioxide absorption tank 9 is assembled and disassembled.
It should be noted that the water accumulation cavity 10 can at least accommodate the accumulated water formed by the loop during one soda lime replacement process or the accumulated water formed by one patient operation, such as 3ml, 5ml, 8ml, 10ml, 20ml or more. The operation of removing and installing the carbon dioxide absorption tank 9 to drain water may be performed by discharging condensed water into the carbon dioxide absorption tank 9 when the carbon dioxide absorption tank 9 is removed; the condensed water may be discharged into the carbon dioxide absorption tank 9 when the carbon dioxide absorption tank 9 is charged.
Specifically, as shown in fig. 4 and 5, when the discharge valve 14 is a two-way valve, the discharge valve 14 has a first valve port 14a and a second valve port 14b.
As shown in fig. 4, when the drain valve 14 is in the first state, the drain valve 14 blocks the passage between the water accumulation cavity 10 and the carbon dioxide absorption tank 9, and the first valve port 14a and the second valve port 14b are in the cut-off state at this time, so that the condensed water cannot flow into the carbon dioxide absorption tank 9 through the water accumulation cavity 10, but is intercepted in the water accumulation cavity 10 by the drain valve 14, so that the condensed water of the expiratory branch is stored in the water accumulation cavity 10.
As shown in fig. 5, when the drain valve 14 is in the second state, the drain valve 14 conducts the passage between the water accumulation cavity 10 and the carbon dioxide absorption tank 9, and the first valve port 14a and the second valve port 14b are in the conducting state, so that the condensed water stored in the water accumulation cavity 10 can be discharged into the carbon dioxide absorption tank 9 from the second valve port 14b, and further, when the sodium-lime reaction is completed and the carbon dioxide absorption tank needs to be detached to replenish sodium-lime, the condensed water can be removed together.
The trigger device can switch the drain valve 14 between the first state and the second state in a photoelectric triggering mode along with the action of disassembling and assembling the carbon dioxide absorption tank 9. For example, the trigger means may comprise a sensor or a microswitch, in which case the drain valve 14 is a solenoid valve; when the carbon dioxide absorption tank 9 is disassembled and assembled, the state of the sensor or the microswitch is changed to trigger the electromagnetic valve to switch between the first state and the second state, so that the accumulated water containing cavity 10 stores condensed water or discharges the condensed water into the carbon dioxide absorption tank 9.
The trigger device may be mechanically triggered to switch the discharge valve 14 between the first state and the second state in response to the operation of attaching and detaching the carbon dioxide absorption tank 9.
Referring to fig. 6 and 7, the drain valve 14 includes a valve seat 141 and a valve element 142, and when the valve element 142 moves relative to the valve seat 141, the valve element 142 is switched between a first state and a second state, so that the water accumulation cavity 10 stores the condensed water or discharges the condensed water into the carbon dioxide absorption tank 9. It should be noted that, when the discharge valve 14 is switched between the first state and the second state, the movement of the valve element 142 relative to the valve seat 141 may be in various forms, for example, the valve element 142 moves up and down relative to the valve seat 141 to open and close the discharge valve 14, or the valve element 142 rotates relative to the valve seat 141, so that the discharge valve 14 is opened or closed when the valve element 142 rotates a certain angle relative to the valve seat 141. The circuit drain apparatus will be further described by taking an example in which the valve body 142 moves up and down relative to the valve seat 141 to control the opening and closing of the drain valve 14.
The valve seat 141 is relatively provided with a first valve port 14a and a second valve port 14b, a first sealing valve port 1411 is arranged in the valve seat 141, and correspondingly, the valve core 142 is provided with a first sealing valve sheet 1421. When the valve element 142 moves relative to the valve seat 141, the first sealing valve 1421 selectively blocks or conducts the first sealing valve port 1411, so as to open or close the drain valve 14, and further control the water accumulation cavity 10 to store condensed water or discharge the condensed water.
It should be noted that, as shown in fig. 6 and 7, the water accumulation cavity 10 may be an inner cavity enclosed by the valve seat 141 itself, so that when the first sealing valve 1421 blocks the first sealing valve port 1411, the condensed water is intercepted and stored in the cavity enclosed by the valve seat 141. Of course, the water accumulation cavity 10 may also be an external cavity communicating with an internal cavity enclosed by the valve seat 141 to store condensed water when the first sealing valve port 1411 is closed; when the first sealing valve port 1411 is opened, condensed water is discharged into the carbon dioxide absorption tank 9 through the first sealing valve port 1411 to remove the condensed water when replacing soda lime, and in addition, because the accumulated water containing cavity for storing the condensed water is arranged outside the drain valve 14, the valve seat 141 of the drain valve 14 can have a small volume, that is, the requirement of the accumulated water containing cavity 10 for storing the condensed water or discharging the condensed water can be met by arranging the small drain valve 14 on the drain passage. The triggering device comprises a driving assembly 9f and a resetting assembly. The driving assembly 9f is used for driving the valve plug 142 to move relative to the valve seat 141 when the carbon dioxide absorbing tank 9 is installed; the reset assembly is used to drive the valve element 142 to move in the opposite direction with respect to the valve seat 141 when the carbon dioxide absorbing canister 9 is removed. Thus, under the action of the driving assembly 9f and the reset assembly, the valve core 142 of the drain valve 14 is moved in opposite directions, so that the drain valve 14 is switched between the first state and the second state.
The driving assembly 9f comprises a bottom plate, the bottom plate is arranged between the carbon dioxide absorption tank 9 and the valve core 142, the bottom plate is pressed by the carbon dioxide absorption tank when the carbon dioxide absorption tank 9 is installed, the valve core 142 is driven to move relative to the valve seat 141, the drain valve 14 is placed in the first state, and the drain passage is blocked so that condensed water is intercepted in the accumulated water accommodating cavity 10. Correspondingly, when the carbon dioxide absorption tank 9 is detached, due to the fact that the pressing of the carbon dioxide absorption tank 9 is lost, the drain valve 14 is restored to the second state under the driving of the reset assembly, the drain passage is conducted, condensed water collected in the accumulated water containing cavity 10 is drained into the carbon dioxide absorption tank 9, and the condensed water is removed along with lime containing, so that the operation is simple and convenient. It should be noted that, the driving assembly 9f and the valve core 142 may be fixedly connected to each other to realize linkage of the valve core 142 with the driving assembly 9f, and an end of the valve core 142 close to the driving assembly 9f may also be abutted against the driving assembly 9f in an abutting manner, which is not limited herein.
The reset assembly may return the drain valve 14 to the second state by directly or indirectly actuating the valve element 142 in an opposite direction relative to the valve seat 141. For example: the reset assembly may be disposed between the driving assembly and the valve seat 141, and the valve core 142 is fixed to the driving assembly, so that when the carbon dioxide absorption tank is removed, the reset assembly drives the driving assembly to move relative to the valve seat 141, and thus the driving assembly drives the valve core 142 to move relative to the valve seat 141. And then as the reset assembly acts directly on the valve element 142, it provides a restoring force to the valve element 142 to move the valve element 142 relative to the valve seat 141. Specifically, the reset assembly includes a resilient element configured to: when the valve core 142 moves relative to the valve seat 141 by installing the carbon dioxide absorption tank, the elastic element is elastically deformed; when the carbon dioxide absorbing tank is removed, the elastic restoring force of the elastic member urges the valve core 142 to move in the opposite direction with respect to the valve seat 141 to place the discharge valve 14 in the second state.
The elastic element can be a compression spring, a tension spring, a torsion spring, a spring sheet or an elastic washer and the like which can provide elastic restoring force. Accordingly, the elastic element may be assembled in a practical manner, for example, the elastic element may be sleeved on the valve element 142, or the elastic element may abut between the bottom plate and the valve seat 141, so as to provide an elastic restoring force to the valve element 142 and move the valve element 142 relative to the valve seat 141, so as to open the drain valve 14 when the carbon dioxide absorption tank 9 is detached.
In some embodiments, as shown in fig. 8, the drain valve 14 employs a two-position three-way valve, i.e., the drain valve 14 also has a third valve port 14c. When the carbon dioxide absorption tank 9 is filled, the first valve port 14a is communicated with the third valve port 14c, so that the condensate water of the expiration branch flows into the ponding containing cavity 10 through the first valve port 14a and the third valve port 14 c; meanwhile, the second port 14b communicating with the carbon dioxide absorption tank 9 is closed, so that the condensed water is intercepted and stored in the water accumulation cavity 10, and the carbon dioxide absorption tank 9 is prevented from communicating with the upstream of the expiration check valve 8 through the drainage passage to disable the expiration check valve 8.
As shown in fig. 9, when the carbon dioxide absorption tank 9 is removed, the second port 14b is connected to the third valve port 14c, so that the condensed water in the water accumulation chamber 10 is discharged into the carbon dioxide absorption tank 9 connected to the second valve port 14b through the third valve port 14c, and the condensed water is discharged when the carbon dioxide absorption tank 9 is removed, so that the condensed water is poured together with the lime hydrate when the lime hydrate in the carbon dioxide absorption tank is cleaned. Meanwhile, because the first valve port 14a is in a cut-off state, the outside cannot be communicated with the upstream of the expiration check valve 8 through the drainage passage, so that the expiration check valve 8 can work normally, the breathing circuit can still keep a working state after the carbon dioxide absorption tank 9 is detached, and anesthetic gas cannot leak to an operating room.
In this embodiment, not only when the carbon dioxide absorption tank 9 is disassembled and assembled, the drainage passage is blocked or conducted to store condensed water or discharge condensed water in the water accumulation containing cavity 10, but also the drainage passage is always in a sealed state to ensure that the breathing circuit is kept isolated from the outside, so that the working state can be still kept after the carbon dioxide absorption tank 9 is disassembled, and after lime is replaced, the carbon dioxide absorption tank 9 is connected into the breathing circuit again. The circuit drain apparatus will be further described with reference to the case where the valve body 142 moves up and down with respect to the valve seat 141 to control the opening and closing of the drain valve 14.
As shown in fig. 10 and fig. 11, a second sealing valve port 1412 is provided in the valve seat 141, and correspondingly, a second sealing valve sheet 1422 is provided on the valve core 142, and the second sealing valve port 1412 is located between the first valve port 14a and the first sealing valve port 1411, so that a third valve port 14c communicated with the water accumulation cavity 10 is formed between the second sealing valve port 1412 and the first sealing valve port 1411. When the valve body 142 moves relative to the valve seat 141, one of the first port 14a and the second port 14b is open to the third port 14c, and the other is closed to the third port 14c, so that the water accumulation chamber 10 is selected to store the condensed water or discharge the condensed water. It should be noted that, in this embodiment, the structure of the drain valve 14 is further described by taking only the up-and-down relative movement between the valve element 142 and the valve seat 141 as an example, but actually, the relative movement between the remaining valve seats 141 of the valve element 142 may also be a rotational movement, and is not described again.
Specifically, as shown in fig. 10, when the carbon dioxide absorption tank 9 is loaded, the second seal valve 1422 is separated from the second seal valve port 1412 to allow the first valve port 14a and the third valve port 14c to be communicated, and at the same time, the first seal valve 1421 blocks the first seal valve port 1411 to allow the second valve port 14b communicated with the carbon dioxide absorption tank 9 to be in a blocking state, so that the condensed water cannot flow from the water accumulation cavity 10 into the carbon dioxide absorption tank 9, and the condensed water flows through the first valve port 14a and the third valve port 14c and is stored in the water accumulation cavity 10.
As shown in fig. 11, when the carbon dioxide absorption tank 9 is removed, the second sealing valve 1422 closes the second sealing valve port 1412 to block the first valve port 14a and the third valve port 14c, and at the same time, the first sealing valve 1421 opens the first sealing valve port 1411 to place the second valve port 14b communicated with the carbon dioxide absorption tank 9 in a communication state, so that condensed water flows into the carbon dioxide absorption tank 9 from the water accumulation cavity 10, and the condensed water is discharged when the carbon dioxide absorption tank 9 is removed, at this time, the second sealing valve 1422 closes the second sealing valve port 1412, so that the breathing circuit does not communicate with the outside through the drainage branch, and the breathing circuit can still maintain a working state when the carbon dioxide absorption tank 9 is removed for lime replacement.
It should be noted that, in this embodiment, the water discharge valve 14 may be a structure as shown in fig. 10 and fig. 11, or may be another structure, for example, the first sealing valve sheet 1421 and the second sealing valve sheet 1422 are not rigidly connected, but are two structures that do not interfere with each other, so as to selectively close or conduct the first sealing valve port 1411 and the second sealing valve port 1412, precisely, the water discharge valve 14 may be composed of a plurality of two-way valves or one-way valves, or the water discharge valve 14 is switched between the first state and the second state in a manner that one valve seat 141 cooperates with a plurality of valve elements 142, which is not described again.
In other embodiments, the operation of discharging the condensed water into the carbon dioxide absorption tank 9 may be performed not when the carbon dioxide absorption tank 9 is removed but when the carbon dioxide absorption tank 9 is attached.
As shown in fig. 12 and 13, the water accumulation volume has two portions, a first portion 10a and a second portion 10b, the first portion 10a and the second portion 10b being in communication with the first valve port 14a and the third valve port 14c, respectively. When the carbon dioxide absorption tank 9 is installed on the circuit, the first valve port 14a is in a cut-off state, so that the condensed water 10 is stored at the first portion 10a, and when the carbon dioxide absorption tank 9 is removed, the state of the drain valve 14 is changed along with the removal of the carbon dioxide absorption tank, that is, as shown in fig. 13, the first valve port 14a is communicated with the third valve port 14c, so that the first portion 10a is communicated with the second portion 10b, and the condensed water in the first portion 10a is discharged into the second portion 10 b; further, when the carbon dioxide absorbing canister 9 is charged, the state of the drain valve 14 is changed and restored to the state shown in fig. 12, so that the second valve port 14b communicates with the third valve port 14c, and since the second valve port 14b communicates with the carbon dioxide absorbing canister 9 and the second portion 10b communicates with the third valve port 14c, when the second valve port 14b communicates with the third valve port 14c, a passage is formed between the second portion 10b and the carbon dioxide absorbing canister 9, so that the condensed water in the second portion 10b is discharged into the carbon dioxide absorbing canister 9, and the condensed water is discharged into the carbon dioxide absorbing canister 9 when the carbon dioxide absorbing canister 9 is charged.
In this embodiment, since the drain passage after the carbon dioxide absorption tank 9 is removed is blocked by the first valve port 14a, the outside cannot be connected to the upstream side of the expiratory check valve 8 through the drain passage, so that the expiratory check valve 8 can be ensured to be operated normally, that is, the breathing circuit can be maintained in an operating state after the carbon dioxide absorption tank 9 is removed, and the anesthetic gas cannot leak to the operating room.
As shown in fig. 14 and 15, the drain valve 14 according to the present embodiment can discharge condensed water into the carbon dioxide absorption tank 9 when the carbon dioxide absorption tank is installed.
Specifically, as shown in FIG. 14, the second sealing valve port 1412 in the valve seat 141 is downstream of the first sealing valve port 1411. When the carbon dioxide absorption tank 9 is loaded, the second sealing valve sheet 1422 leaves the second sealing valve port 1412, so that the second valve port 14b is communicated with the third valve port 14c, and the second part 10b of the water accumulation cavity is communicated with the carbon dioxide absorption tank 9, that is, at this time, the condensed water in the second part 10b of the water accumulation cavity is discharged into the carbon dioxide absorption tank 9. Meanwhile, the first sealing valve 1421 blocks the first sealing valve port 1411 to enable the first valve port 14a communicated with the expiration branch to be in a cut-off state, so that the condensed water cannot flow from the first portion 10a of the water accumulation cavity to the second portion 10b of the water accumulation cavity, and the condensed water is stored in the water accumulation cavity 10 a.
As shown in fig. 15, when the carbon dioxide absorbing canister 9 is removed, the second seal valve 1422 closes the second seal valve port 1412 to block the second port 14b and the third port 14c, and at the same time, the first seal valve 1421 opens the first seal valve 1411 to open the first port 14a and the third port 14c, and since the first portion 10a and the second portion 10b communicate with the first port 14a and the third port 14c, respectively, the first portion 10a and the second portion 10b communicate with each other, and therefore, condensed water flows from the first portion 10a into the second portion 10 b; when the carbon dioxide absorption tank 9 is installed, the state of the drain valve 14 changes, that is, as shown in fig. 14, the second seal valve sheet 1422 leaves the second seal valve port 1412 to enable the second valve port 14b to be communicated with the third valve port 14c, and the second part 10b of the ponding volume is communicated with the carbon dioxide absorption tank 9, so that the condensed water in the second part 10b of the ponding volume is drained into the carbon dioxide absorption tank 9, and the drainage of the condensed water when the carbon dioxide absorption tank 9 is installed is completed.
In the above embodiment, the drain valve 14 may be of the construction shown in fig. 14 and 15, or of another construction and, in addition, the first portion 10a of the water collection volume and/or the second portion 10b of the water collection volume may be a chamber enclosed by the valve seat 141, or may be a chamber independent of the valve seat 141, for example, by providing the first portion 10a of the water collection volume between the first valve port 14a of the drain valve 14 and the expiratory limb, so that when the passage between the first valve port 14a and the third valve port 14c is closed, the condensate from the expiratory limb is trapped and stored in the first portion 10a of the water collection volume. It should be noted that, in this embodiment, the discharge valve 14 may be composed of a plurality of two-way valves or one-way valves, or the discharge valve 14 is switched between the first state and the second state in a manner that one valve seat 141 cooperates with a plurality of valve elements 142, which is not described in detail herein.
In the above embodiments, the structure and arrangement of the circuit drainage device for collecting the condensed water in the expiratory branch will be described. The person skilled in the art can arrange the circuit drain at any position of the breathing circuit, according to the above embodiments, for collecting and draining the condensed water. That is, the circuit drain device may be disposed in a place where condensate water is likely to be generated in the breathing circuit according to actual needs, for example, as shown in fig. 16, and the circuit drain device may be disposed in the inspiration branch circuit, and specifically, a bypass may be drawn between the inspiration flow sensor 5 and the inspiration check valve 7 to communicate with the drain passage, so that the circuit drain device may collect and drain the condensate water generated in the inspiration branch circuit through the bypass.
In the above embodiment, the drain passage in the circuit drain is not limited, and for example, as shown in fig. 17, the drain passage of the circuit drain communicates with the side of the intake flow rate sensor 5 remote from the intake check valve 7, and the above circuit drain can still collect and discharge the condensed water there. It is understood that, in some other embodiments, the above-mentioned circuit drainage device may be disposed at other positions of the breathing circuit, and of course, in order to achieve good condensed water collecting and draining effects, the above-mentioned circuit drainage device may be disposed on a pipeline of the breathing circuit where water accumulation is likely to occur, for example, in some embodiments, the circuit drainage device is disposed on an expiratory branch, which is not described in detail herein.
All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (18)
1. A return circuit drainage device for discharging condensed water of a breathing return circuit of an anesthesia machine when a carbon dioxide absorption tank is disassembled and assembled, the breathing return circuit comprises an absorption tank branch, the carbon dioxide absorption tank is detachably arranged on the absorption tank branch, and the return circuit drainage device comprises:
a water discharge passage communicating with the carbon dioxide absorption tank;
the water accumulation cavity and the drain valve are arranged on the drain passage;
the drain valve has a first state and a second state; when the drain valve is in the first state, the drain valve blocks a passage between the water accumulation cavity and the carbon dioxide absorption tank so that condensed water of the breathing circuit is stored in the water accumulation cavity; when the drain valve is in the second state, the drain valve conducts a passage between the accumulated water containing cavity and the carbon dioxide absorption tank so as to discharge condensed water in the accumulated water containing cavity into the carbon dioxide absorption tank; and
and the triggering device is used for switching the drain valve from the first state to the second state when the carbon dioxide absorption tank is detached.
2. A return circuit drainage device for discharging condensed water of a breathing return circuit of an anesthesia machine when a carbon dioxide absorption tank is disassembled and assembled, the breathing return circuit comprises an absorption tank branch, the carbon dioxide absorption tank is detachably arranged on the absorption tank branch, and the return circuit drainage device comprises:
a water discharge passage communicating with the carbon dioxide absorption tank;
the water accumulation cavity is arranged on the drainage passage and comprises a first part and a second part, and the first part is communicated with the breathing loop;
the drain valve is arranged on the drain passage and has a first state and a second state; wherein when the water discharge valve is in the first state, the water discharge valve blocks the passage between the first portion and the second portion and conducts the passage between the second portion and the carbon dioxide absorption tank; when the water discharge valve is in the second state, the water discharge valve opens the passage between the first portion and the second portion and blocks the passage between the second portion and the carbon dioxide absorption tank; and
a trigger device for switching the drain valve from the first state to the second state when the carbon dioxide absorption tank is detached; and switching the drain valve from the second state to the first state when the carbon dioxide absorption tank is loaded.
3. The circuit drain of claim 1, wherein the drain valve has a first port and a second port; the first valve port is communicated with the breathing circuit; the second valve port is communicated with the carbon dioxide absorption tank.
4. A circuit drain as claimed in claim 3, wherein a first sealing valve port is provided between the first and second valve ports, and the drain valve comprises a first sealing flap; when the drain valve is in the first state, the first sealing valve plate closes the first sealing valve port, and when the drain valve is in the second state, the first sealing valve plate conducts the first sealing valve port.
5. The circuit drain of claim 4, wherein a second sealing valve port is disposed between the first valve port and the first sealing valve port, the drain valve further comprising a second sealing flap; when the drain valve is in a first state, the second sealing valve plate leaves the second sealing valve port; and when the drain valve is in a second state, the second sealing valve plate closes the second sealing valve port.
6. The circuit drain of claim 2, wherein the drain valve has a first port and a second port; the first valve port is communicated with the breathing circuit; the second valve port is communicated with the carbon dioxide absorption tank.
7. A circuit drain as claimed in claim 6, wherein there are first and second sealing ports between the first and second ports, the first sealing port being between the first and second portions and the second sealing port being between the second and second portions.
8. The circuit drain of claim 7, wherein the drain valve comprises a first sealing flap and a second sealing flap; when the drain valve is in the first state, the first sealing valve sheet closes the first sealing valve port, and the second sealing valve sheet conducts the second sealing valve port; when the drain valve is in the second state, the first seal valve sheet conducts the first seal valve port, and the second seal valve sheet closes the second seal valve port.
9. The circuit drain of claim 5 or 8, wherein the drain valve includes a valve seat and a valve element, the valve element being movable relative to the valve seat to switch the drain valve between the first state and the second state.
10. The circuit drain of claim 9, wherein the first sealing flap and the second sealing flap are both sleeved on the valve element.
11. The circuit drain of claim 1 or 2, wherein the breathing circuit comprises an expiratory limb and an inspiratory limb, and a bypass leads from the expiratory limb and/or the inspiratory limb to communicate with the drain passage.
12. The circuit drain of claim 1 or 2, wherein the trigger device comprises a sensor or a microswitch, and the drain valve is a solenoid valve; when the carbon dioxide absorption tank is dismounted, the state of the sensor or the microswitch is changed to trigger the electromagnetic valve to switch between the first state and the second state.
13. The circuit drain of claim 9, wherein the trigger device includes a drive assembly and a reset assembly, wherein when the carbon dioxide canister is installed, the carbon dioxide canister drives the drive assembly to move the valve element relative to the valve seat; when the carbon dioxide absorption tank is detached, the driving assembly loses the force effect of the carbon dioxide absorption tank, so that the valve core moves towards the opposite direction relative to the valve seat under the effect of the resetting assembly.
14. The circuit drain of claim 13, wherein the drive assembly includes a base plate disposed between the carbon dioxide absorption tank and the valve cartridge; when the carbon dioxide absorption tank is installed, the carbon dioxide absorption tank is pressed against the bottom plate to drive the valve core to move relative to the valve seat, so that the drain valve is placed in the first state.
15. The circuit drainage device according to claim 13, wherein the reset member is disposed between the driving member and the valve seat, and the valve element is connected to the driving member, and when the carbon dioxide absorption tank is removed, the reset member drives the driving member to move relative to the valve seat, so that the driving member drives the valve element to move relative to the valve seat to place the drainage valve in the second state.
16. The circuit drain of claim 13, wherein the reset assembly comprises a resilient element configured to: when the carbon dioxide absorption tank is installed and the valve core moves relative to the valve seat, the elastic element generates elastic deformation; when the carbon dioxide absorption tank is detached, the elastic restoring force of the elastic element drives the valve core to move towards the opposite direction relative to the valve seat, so that the drain valve is placed in the second state.
17. The circuit drain of claim 16, wherein the resilient member is disposed on the valve element to provide a resilient restoring force on the valve element to maintain the drain valve in the second state.
18. An anaesthesia machine comprising a circuit drainage device as claimed in any one of claims 1 to 17.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2017/107133 WO2019075756A1 (en) | 2017-10-20 | 2017-10-20 | Anesthesia machine and circuit drainage device thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111182937A CN111182937A (en) | 2020-05-19 |
| CN111182937B true CN111182937B (en) | 2023-03-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780095156.4A Active CN111182937B (en) | 2017-10-20 | 2017-10-20 | Anesthesia machine and loop drainage device thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111182937B (en) |
| WO (1) | WO2019075756A1 (en) |
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| US6619289B1 (en) * | 2001-02-09 | 2003-09-16 | Datex-Ohmeda, Inc. | Carbon dioxide absorber canister with breathing gas moisture sump |
| CN101376040A (en) * | 2007-08-31 | 2009-03-04 | 深圳迈瑞生物医疗电子股份有限公司 | Installation apparatus of carbon dioxide absorption tank |
| CN101468221A (en) * | 2007-12-29 | 2009-07-01 | 北京谊安医疗系统股份有限公司 | Anaesthetic absorbing loop |
| CN203816015U (en) * | 2014-04-03 | 2014-09-10 | 北京思瑞德医疗器械有限公司 | Anesthesia breathing loop provided with water collecting cup at expiration end |
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| US7591267B2 (en) * | 2005-09-06 | 2009-09-22 | General Electric Company | Room temperature heat exchanger for breathing circuit |
| US20110197889A1 (en) * | 2010-02-16 | 2011-08-18 | Ninna Lahde | Arrangement and method for supplying breathing gas for respiration |
| US8770191B2 (en) * | 2011-01-07 | 2014-07-08 | General Electric Company | System and method for providing mechanical ventilation support to a patient |
| CN202113453U (en) * | 2011-06-08 | 2012-01-18 | 计宁翔 | Breathing circuit for anesthesia apparatus |
| US9199050B2 (en) * | 2012-04-30 | 2015-12-01 | Carefusion Corporation | Arrangement and method for guiding expired respiratory gas flow using gas routing device |
| CN105517612B (en) * | 2014-12-02 | 2018-06-12 | 深圳迈瑞生物医疗电子股份有限公司 | Anesthesia machine respiratory system and anesthesia machine |
| CN204798550U (en) * | 2015-04-08 | 2015-11-25 | Ge医疗系统环球技术有限公司 | Anesthesia machine respiratory |
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2017
- 2017-10-20 WO PCT/CN2017/107133 patent/WO2019075756A1/en active Application Filing
- 2017-10-20 CN CN201780095156.4A patent/CN111182937B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6619289B1 (en) * | 2001-02-09 | 2003-09-16 | Datex-Ohmeda, Inc. | Carbon dioxide absorber canister with breathing gas moisture sump |
| CN101376040A (en) * | 2007-08-31 | 2009-03-04 | 深圳迈瑞生物医疗电子股份有限公司 | Installation apparatus of carbon dioxide absorption tank |
| CN101468221A (en) * | 2007-12-29 | 2009-07-01 | 北京谊安医疗系统股份有限公司 | Anaesthetic absorbing loop |
| CN203816015U (en) * | 2014-04-03 | 2014-09-10 | 北京思瑞德医疗器械有限公司 | Anesthesia breathing loop provided with water collecting cup at expiration end |
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| Publication number | Publication date |
|---|---|
| CN111182937A (en) | 2020-05-19 |
| WO2019075756A1 (en) | 2019-04-25 |
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