Anesthesia vaporizer and anesthesia machine

Abstract

The present application provides a kind of anesthetic evaporator and anesthesia machine, comprising: evaporator disc, for self-rotation around the center of itself under external force drive;N anesthetic evaporation container, fixed on the evaporator disc around the center of evaporator disc, the anesthetic stored in each anesthetic evaporation container is different, N is natural number greater than or equal to 2;By rotating evaporator disc, drive the anesthetic evaporation container to be used to rotate to the same specified position, the anesthetic evaporation container at specified position is towards patient;When the anesthetic evaporation container to be used is rotated to specified position, the anesthetic evaporation container to be used is connected power supply, and is switched from idle state to use state;Two openings are provided on the shell of the evaporator disc, one opening is communicated with the anesthetic evaporation container in use state, and is connected to the respiratory system of patient through breathing circuit;Another opening is communicated with the anesthetic evaporation container in idle state, is connected to the outside world and is provided with sealing cover, for updating anesthetic.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an anesthesia vaporizer and an anesthesia machine. Background Technology

[0002] In medical equipment, anesthesia machines are widely used as essential medical instruments for surgical anesthesia. Their main function is to administer an appropriate amount of anesthetic gas mixture to the surgical patient while simultaneously supplying a certain proportion of oxygen to ensure normal breathing. During general anesthesia, they maintain and monitor the patient's vital signs, ensuring the safe and reliable conduct of the surgery. The performance of the anesthesia machine directly affects whether the surgery can proceed normally; therefore, the safety, reliability, and accuracy of the equipment are important indicators for evaluating the quality of anesthesia machines.

[0003] The anesthetic vaporizer is a key component of an anesthesia machine. Its basic principle is to utilize changes in ambient temperature and heat sources to vaporize anesthetic drugs into vaporized gas. A certain amount of carrier gas carries away some of the saturated anesthetic gas, creating a flow of anesthetic vapor with a specific concentration, which directly enters the anesthesia circuit. Different anesthetic drugs have different pharmacological properties. For example, sevoflurane (Sev) is a pleasant gas with low irritation and can be used for induction. Desflurane (Des) has low blood solubility and low lipid solubility, allowing for faster and more precise adjustment of anesthesia precision; therefore, Des can be used for maintenance anesthesia. Thus, different anesthetic drugs need to be used at different stages of surgery based on their properties.

[0004] Anesthesia vaporizers vary depending on the type of anesthetic drug used, and have different evaporation temperatures. Examples include enflurane (Enf) vaporizers, isoflurane (Iso) vaporizers, sevoflurane (Sev) vaporizers, halothane vaporizers, and desflurane (Des) vaporizers. To facilitate timely drug changes, anesthesia machines typically support two or more vaporizers. To prevent cross-contamination between different anesthetic drugs, only one vaporizer should be active at any given time. For anesthesia machines with two or more electronic vaporizers, vaporizer selection and settings are usually performed through the human-machine interface (HMI), which typically displays only the currently used vaporizer control. If the user wants to switch to a different type of vaporizer, they must first open an additional vaporizer selection menu through the HMI, then select the desired vaporizer type (i.e., select the required vaporizer), and finally click "Confirm" to complete the switch. Subsequent operations, such as adjusting the vaporizer concentration, can then be performed after the switch. At the same time, improper opening of the cap during use can easily lead to leakage of the anesthetic drug during addition and use, causing accidents.

[0005] In clinical settings, there are numerous opportunities to sequentially use different anesthetic gases. For instance, sevoflurane can be used during anesthesia induction, and once the patient is in a stable state of anesthesia, desflurane can be switched to maintain the depth of anesthesia. Another example is the use of low-concentration sevoflurane (<1 MAC) before delivery to maintain maternal anesthesia while minimizing fetal inhibition. After delivery, sevoflurane is discontinued, and N2O combined with intravenous anesthetics (such as propofol) is used to reduce uterine contraction inhibition and the risk of postpartum hemorrhage. In these situations, rapid and reliable switching of vaporizers for drug delivery becomes crucial. Timely and convenient replenishment of drugs when they run out is also very helpful. Excessive procedures and repeated confirmations can easily lead to errors, and are time-consuming and labor-intensive.

[0006] However, existing multi-vaporizer anesthesia machines often rely on software to control each vaporizer, using a display interface and buttons for the operator to select the vaporizer. This switching control method lacks certain reliability, and it is difficult to detect errors in time. Once a hardware jam occurs, the control software also has difficulty detecting and correcting it. How to use hardware to ensure that the correct vaporizer is turned on correctly, and to ensure that the corresponding vaporizer does not turn on when adding anesthetic drugs to prevent drug evaporation and leakage, are all issues that lack corresponding mechanisms in the current technology. Summary of the Invention

[0007] This invention provides an anesthesia vaporizer and anesthesia machine to solve the problem that the switching control of multiple vaporizers in the prior art is performed on the human-machine interface, which has low reliability. The invention realizes the switching control of multiple vaporizers through a rotating switching mechanism, which has high reliability.

[0008] This invention provides an anesthesia vaporizer, comprising:

[0009] Evaporator discs are used to rotate around their own center under external force.

[0010] N anesthetic vaporization containers are fixed on the vaporization plate around the center of the vaporization plate. Each anesthetic vaporization container stores a different type of anesthetic drug, and N is a natural number greater than or equal to 2.

[0011] By rotating the vaporizer disc, the anesthesia vaporizing container to be used is rotated to the same designated position, with the anesthesia vaporizing container at the designated position facing the patient;

[0012] When the anesthetic vaporization container to be used rotates to the designated position, the anesthetic vaporization container to be used is powered on and switches from idle state to use state.

[0013] The vaporizer plate has two openings on its outer shell. One opening is connected to the anesthetic vaporizer container in use and is connected to the patient's respiratory system through a breathing circuit. The other opening is located on the vaporizer plate opposite to the first opening and is connected to another anesthetic vaporizer container in an idle state. It is open to the outside and has a sealing cap for refilling the anesthetic.

[0014] According to the present invention, an anesthesia vaporizer is provided, wherein the vaporizer plate is circular, and the N anesthesia vaporization containers are all fan-shaped containers with a certain thickness and a central angle of 360° / N.

[0015] According to the present invention, an anesthesia vaporizer has an outer edge of the vaporizer disc with a non-slip textured shell for easy hand rotation; and / or,

[0016] The anesthetic vaporizer container, which is to be used, is locked when rotated to the designated position.

[0017] According to the present invention, when the anesthetic vaporizer to be used is rotated to a designated position, the electronic display interface is triggered to display the corresponding prompt information.

[0018] The notification information includes one or more of the following: the working status of the anesthetic vaporization container, the type of anesthetic drug, and the anesthetic drug flow rate.

[0019] According to an anesthetic vaporizer provided by the present invention, when the anesthetic vaporizer to be used is rotated to a designated position, the type of anesthetic drug in the anesthetic vaporizer to be used is determined and displayed based on the type of anesthetic drug in the previous anesthetic vaporizer, the rotation angle of the anesthetic vaporizer to be used, and the arrangement order of the N anesthetic vaporizers.

[0020] The prompts are displayed using indicator light colors or text.

[0021] According to the present invention, an anesthesia vaporizer has the following working states: normal use state, abnormal use state, and idle state.

[0022] The abnormal operating conditions include one or more of the following: the anesthetic vaporizer is in the open state, the anesthetic vaporization container is in the drug addition state, and the remaining amount of anesthetic in the anesthetic vaporization container is insufficient.

[0023] According to the present invention, when the remaining amount of anesthetic in any anesthetic vaporizer is detected to be insufficient, an alarm is issued by at least one of the following methods: icon, color, text, brightness, and sound, or a reminder signal is issued to remind the user to switch anesthetic vaporizers.

[0024] An anesthetic vaporizer according to the present invention further includes:

[0025] An anesthesia controller is connected to the output device of the anesthesia vaporization container in use, and the anesthesia controller is used to control the flow rate of anesthetic drugs;

[0026] A ventilation controller, connected to the breathing circuit, provides ventilation support to the patient through the breathing circuit.

[0027] The present invention also provides an anesthesia machine, including any of the anesthesia vaporizers described above.

[0028] The present invention also provides an anesthesia method, comprising:

[0029] The aforementioned anesthesia machine was used to administer surgical anesthesia to the patient, while simultaneously monitoring the depth of anesthesia.

[0030] This invention provides an anesthesia vaporizer and anesthesia machine. The anesthesiologist switches the anesthetic gas via a manually operated vaporizer disc, reducing the risk of misoperation compared to button presses. The selected anesthetic drug is double-checked through color and text displays on the vaporizer disc's outer perimeter and the corresponding electronic display interface, eliminating the possibility of software errors in drug selection. Furthermore, the two opposing openings on the vaporizer disc completely eliminate the possibility of leakage of the active drug gas. Only the breathing circuit connection opening of the active vaporizer is open; the drug delivery port cannot be open simultaneously. When the other drug delivery port is open, it is connected to an unused vaporizer. This design ensures safer and more reliable operation of the multi-drug anesthesia machine. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is one of the structural schematic diagrams of the anesthesia vaporizer provided by the present invention;

[0033] Figure 2 This is the second schematic diagram of the structure of the anesthesia vaporizer provided by the present invention. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0035] The following is combined Figure 1 The evaporator disc of the present invention is used to rotate about its own center under the drive of an external force;

[0036] N anesthetic vaporization containers are fixed on the vaporization plate around the center of the vaporization plate. Each anesthetic vaporization container stores a different type of anesthetic drug, and N is a natural number greater than or equal to 2.

[0037] By rotating the vaporizer disc, the anesthesia vaporizing container to be used is rotated to the same designated position, with the anesthesia vaporizing container at the designated position facing the patient;

[0038] When the anesthetic vaporization container to be used rotates to the designated position, the anesthetic vaporization container to be used is powered on and switches from idle state to use state.

[0039] The vaporizer plate has two openings on its outer shell. One opening is connected to the anesthetic vaporizer container in use and is connected to the patient's respiratory system through a breathing circuit. The other opening is located on the vaporizer plate opposite to the first opening and is connected to another anesthetic vaporizer container in an idle state. It is open to the outside and has a sealing cap for refilling the anesthetic.

[0040] Each anesthesia vaporizer will rotate to the designated position to face the user and enter the usage state. This will trigger the corresponding indicator light color and text display reminder, and the device will enter a relative position locking state. A slight force needs to be applied to rotate the vaporizer disc to the next position to face the user and re-lock it.

[0041] The anesthesia output device can sense when one of N vaporizers marked by the user enters a designated position, i.e., facing the user. A graphical representation of the anesthesia vaporizer container is displayed on an electronic interface, indicating the name of the drug corresponding to the vaporizer currently facing the user. Upon user confirmation, the anesthesia controller initiates output from the anesthesia vaporizer container facing the user based on the corresponding anesthesia control information.

[0042] A gas source is used to provide the gas. This gas can typically be oxygen, nitrous oxide (laughing gas), or air. In some embodiments, the gas source uses compressed gas cylinders (or a central gas supply source), and the supplied gas types include oxygen (O2), nitrous oxide (N2O), and air. The gas source may also include conventional components such as pressure gauges, pressure regulators, flow meters, pressure reducing valves, and N2O-O2 proportional control and protection devices, which will not be detailed here. The anesthesia machine 100 in this embodiment is equipped with three flow rate selectors 106, used to control the flow rates of oxygen, nitrous oxide, and air respectively; however, it should be understood that the number is not limited to three.

[0043] like Figure 1 As shown, three anesthetic vaporizers are supported on an vaporizer plate, forming a complete and evenly divided vaporizer plate. Each vaporizer plate has an independent outer shell. The bottom of the outer shell forms a handwheel 1001 for the user to rotate, switching the vaporizer to the desired position. When each anesthetic vaporizer is in the desired position, a corresponding colored light and text indicator light illuminate inside the transparent handwheel 1001 to reinforce anesthetic identification. An outer shell 1002 is formed on the upper surface of the vaporizer plate shell, with two openings. One opening connects to the anesthetic vaporizer 101 in the desired position, for outputting anesthetic gas; this is called the gas path interface 1003. The other opening connects to the anesthetic vaporizer 102 in the non-desired position, for replenishing anesthetic drugs when needed; this is called the drug inlet interface 1004.

[0044] During anesthesia, the anesthesiologist selects the type and concentration of anesthetic drug to be used by turning the anesthetic vaporizer handwheel 1001. After selection, the handwheel 1001 illuminates with a corresponding color indicator light and text reminder, and the electronic display also lights up, providing buttons to start and pause vaporization, effectively double-checking the type of anesthetic drug to be used. When the anesthesia process requires switching anesthetic drugs, the anesthesiologist again turns the anesthetic vaporizer handwheel 1001 to the desired position, and the corresponding anesthetic vaporization container enters the usage position. The handwheel 1001 and the electronic display also illuminate with corresponding color indicator lights and text reminders. At this point, the program is set to start the vaporization output of the next drug without requiring confirmation. After anesthesia ends, the anesthesiologist presses the stop button on the anesthesia control input device to end the vaporization program.

[0045] If the amount of anesthetic drug falls below a certain threshold, the anesthesia machine can provide alerts through various means. The anesthesiologist can press the drug addition button on the anesthesia control input device to enter the drug addition mode (which can pause the anesthetic output). After turning the anesthetic vaporizer handwheel 1001 to a certain position, the anesthetic vaporizer (with all gas vaporizers in a closed state) connected to the drug inlet 1004 can begin drug addition. The electronic display interface will also light up to show the corresponding information. This method of drug addition minimizes ineffective evaporation, avoids opening the lid during use to prevent contamination of the gas path and surgical space, and allows for verification that the drug addition is correct.

[0046] In this embodiment, the anesthetic vaporizer can be switched by the anesthesiologist manually adjusting the vaporizer plate, which is less prone to misoperation compared to button clicks. Furthermore, the two opposing openings on the vaporizer plate completely eliminate the possibility of leakage of the active anesthetic gas. Only the breathing circuit connection opening of the active anesthetic vaporizer is open; the drug delivery port cannot be open simultaneously. When the drug delivery port on the other end is open, it is always connected to an unused anesthetic vaporizer. This makes the use of the multi-drug anesthetic vaporizer anesthesia machine safer and more foolproof.

[0047] Based on the above embodiments, in this embodiment the evaporator plate is circular, and the N anesthesia evaporation containers are all fan-shaped containers with a certain thickness and a central angle of 360° / N.

[0048] Based on the above embodiments, the outer edge of the evaporator plate in this embodiment has a non-slip textured shell that facilitates hand rotation; and / or,

[0049] The anesthetic vaporizer container, which is to be used, is locked when rotated to the designated position.

[0050] Based on the above embodiments, in this embodiment, when the anesthetic vaporization container to be used is rotated to the designated position, the electronic display interface is triggered to display the corresponding prompt information;

[0051] The notification information includes one or more of the following: the working status of the anesthetic vaporization container, the type of anesthetic drug, and the anesthetic drug flow rate.

[0052] This embodiment verifies the selected anesthetic drug again through the color and text display on the outer periphery of the vaporizer plate and the corresponding electronic display interface of the anesthetic drug, thus eliminating the possibility of software errors in anesthetic drug selection from a hardware perspective.

[0053] Based on the above embodiments, in this embodiment, when the anesthetic vaporization container to be used is rotated to a designated position, the type of anesthetic drug in the anesthetic vaporization container to be used is determined and displayed according to the type of anesthetic drug in the previous anesthetic vaporization container, the rotation angle of the anesthetic vaporization container to be used, and the arrangement order of the N anesthetic vaporization containers.

[0054] The prompts are displayed using indicator light colors or text.

[0055] Based on the above embodiments, the working states of the anesthesia vaporization container in this embodiment include normal use state, abnormal use state, and idle state;

[0056] The abnormal operating conditions include one or more of the following: the anesthetic vaporizer is in the open state, the anesthetic vaporization container is in the drug addition state, and the remaining amount of anesthetic in the anesthetic vaporization container is insufficient.

[0057] The electronic display interface dynamically presents the output of the anesthesia controller and the working status of the anesthesia vaporizer using graphical controls.

[0058] Based on the above embodiments, in this embodiment, when it is detected that the remaining amount of anesthetic in any anesthetic vaporization container is insufficient, an alarm is issued through at least one of the following methods: icon, color, text, brightness, and sound, or a reminder signal is issued to remind the user to switch anesthetic vaporization containers.

[0059] Based on the above embodiments, this embodiment also includes:

[0060] An anesthesia controller is connected to the output device of the anesthesia vaporization container in use, and the anesthesia controller is used to control the flow rate of anesthetic drugs;

[0061] A ventilation controller, connected to the breathing circuit, provides ventilation support to the patient through the breathing circuit and delivers the mixed gas output from the anesthetic vaporizer to the patient.

[0062] This embodiment also provides an anesthesia machine, including the anesthesia vaporizer in any of the above embodiments.

[0063] The anesthesia machine of this embodiment includes a gas source, a breathing circuit assembly, an anesthesia output device, an anesthesia controller, and a human-machine interface assembly. The anesthesia machine can be mounted on a trolley, which may be equipped with wheels for easy movement.

[0064] See Figure 2The anesthesia output device includes at least two anesthetic vaporizers. The anesthetic is typically liquid, and the vaporizers store and vaporize it. A gas source is connected to the vaporizer, allowing the gas output from the source to mix with the vaporized anesthetic gas, which is then output. A branch of the gas output from the source can enter the vaporizer. The vaporizer converts the anesthetic into vapor and feeds it in a predetermined amount into the breathing circuit assembly, providing the patient with the vaporized gas mixture. An anesthesia controller is connected to the anesthesia output device; a ventilation controller is connected to the breathing circuit, providing ventilation support to the patient and outputting the vaporized gas mixture from the vaporizers to the patient. An anesthesia control input device and an electronic display interface serve as a human-machine interface, accepting input from the anesthesiologist and providing feedback on control execution.

[0065] An electronically controlled vaporizer combines a microcomputer and sensors, consisting of an vaporization chamber and a bypass chamber. An electronic flow control valve can be installed at the outlet of the vaporization chamber. This valve is controlled by a CPU inside the canister. The CPU receives information from the vaporizer concentration control panel, and, based on information from pressure and temperature sensors within the vaporization chamber, as well as flow meters at the outlets of the vaporization chamber and bypass chamber, and information from gas monitoring, it comprehensively analyzes and precisely controls the flow valve to achieve the desired inhaled anesthetic concentration. The use of an electronic vaporizer automates anesthetic concentration control; however, switching between electronic vaporizers, such as using buttons or mouse clicks, is prone to misoperation, and these misoperations are difficult to detect.

[0066] This embodiment provides an anesthesia method, including:

[0067] The aforementioned anesthesia machine was used to administer surgical anesthesia to the patient, while simultaneously monitoring the depth of anesthesia.

[0068] This invention uses a sensor disc's handwheel rotation to switch modes, along with color changes and text displays, to clearly indicate to the user which anesthetic drug is being evaporated by the vaporizer. This hardware-based approach prevents accidental operation, and even if accidental operation occurs, the user can intuitively obtain a notification through the tactile feedback and display. Simultaneously, the two vaporizer disc openings positioned opposite each other, combined with the circular layout of multiple vaporizers, also hardware-basedly eliminates the possibility of the vaporizer being opened during use, preventing anesthetic drug leakage and ensuring smooth anesthesia administration.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An anesthesia vaporizer, characterized in that, include: Evaporator discs are used to rotate around their own center under external force. N anesthetic vaporization containers are fixed on the vaporization plate around the center of the vaporization plate. Each anesthetic vaporization container stores a different type of anesthetic drug, and N is a natural number greater than or equal to 2. By rotating the vaporizer disc, the anesthesia vaporizing container to be used is rotated to the same designated position, with the anesthesia vaporizing container at the designated position facing the patient; When the anesthetic vaporization container to be used rotates to the designated position, the anesthetic vaporization container to be used is powered on and switches from idle state to use state. The vaporizer disc has two openings on its outer shell. One opening is connected to an anesthetic vaporizer container in use and is connected to the patient's respiratory system via a breathing circuit. The other opening is located on the vaporizer disc opposite to the first opening and is connected to another anesthetic vaporizer container in an idle state. It is open to the outside and has a sealing cover for refilling anesthetic drugs. When the anesthetic vaporizer disc handwheel is turned to a certain position, the anesthetic vaporizer connected to the other opening will start adding drugs, and the one connected to it must be an anesthetic vaporizer that is not in use. When the anesthetic vaporization container to be used is rotated to the designated position, the electronic display interface is triggered to display the corresponding prompt information; The notification information includes one or more of the following: the working status of the anesthetic vaporization container, the type of anesthetic drug, and the anesthetic drug flow rate.

2. The anesthesia vaporizer according to claim 1, characterized in that, The evaporator plate is circular, and the N anesthesia evaporation containers are all fan-shaped containers with a certain thickness and a central angle of 360° / N.

3. The anesthesia vaporizer according to claim 1, characterized in that, The outer edge of the evaporator plate has a non-slip textured shell for easy hand rotation; and / or, The anesthetic vaporizer container, which is to be used, is locked when rotated to the designated position.

4. The anesthesia vaporizer according to claim 1, characterized in that, When the anesthetic vaporizer to be used rotates to the designated position, the type of anesthetic drug in the anesthetic vaporizer to be used is determined and displayed based on the type of anesthetic drug in the previous anesthetic vaporizer, the rotation angle of the anesthetic vaporizer to be used, and the arrangement order of the N anesthetic vaporizers. The prompts are displayed using indicator light colors or text.

5. The anesthesia vaporizer according to claim 1, characterized in that, The working states of the anesthesia vaporization container include normal use state, abnormal use state, and idle state; The abnormal usage conditions include one or more of the following: the anesthetic vaporizer is in the open state, the anesthetic vaporization container is in the drug-adding state, and the remaining amount of anesthetic in the anesthetic vaporization container is insufficient.

6. The anesthesia vaporizer according to claim 5, characterized in that, When the remaining amount of anesthetic in any anesthetic vaporizer is detected to be insufficient, an alarm will be issued through at least one of the following methods: icon, color, text, brightness, or sound, or a reminder signal will be issued to remind the user to switch anesthetic vaporizers.

7. The anesthesia vaporizer according to claim 1, characterized in that, Also includes: An anesthesia controller is connected to the output device of the anesthesia vaporization container in use, and the anesthesia controller is used to control the flow rate of anesthetic drugs; A ventilation controller, connected to the breathing circuit, provides ventilation support to the patient through the breathing circuit.

8. An anesthesia machine, characterized in that, Includes the anesthetic vaporizer as described in any one of claims 1-7.

Images