An inhalation laughing gas analgesic device and gas supply method

Abstract

The present application relates to nitrous oxide analgesia technical field, specifically to a kind of inhalation nitrous oxide analgesia device. Including the first three-way joint of intercommunication, one end of the first three-way joint passes through nitrous oxide mixed gas output device and is input nitrous oxide mixed gas, one-way valve is connected on the first three-way joint, flowmeter is arranged between the one-way valve and the first three-way joint, the one-way valve is communicated with atmosphere;It also includes inhalation device, the first three-way joint is communicated with inhalation device;It also includes control unit, the control unit is electrically connected with flowmeter and nitrous oxide output device.For the technical problem that traditional nitrous oxide analgesia gas supply method effect is poor, the present application can provide the amount of nitrous oxide mixed gas that patient actually needs, will not cause waste, also will not make patient breathing hard, can also reduce nitrous oxide mixed gas supply amount along with the continuous reduction of patient demand amount in analgesia process, reduce waste.

Description

Technical Field

[0001] This invention relates to the field of nitrous oxide analgesia technology, specifically to an inhalation nitrous oxide analgesia device and a nitrous oxide supply method. Background Technology

[0002] Currently, nitrous oxide inhalation analgesia devices use a constant pressure method to achieve on-demand gas supply. The constant pressure method means that the pressure of the mixed gas output by the device is maintained at a set value. When the patient inhales the gas, the gas pressure decreases, and the nitrous oxide inhalation analgesia device immediately replenishes the gas until the pressure value reaches the set value again.

[0003] The drawbacks of this method are as follows: 1. Equipment response lag: There is a delay from the time the patient inhales until the equipment replenishes the gas to the set pressure value, which makes breathing difficult for the patient. Clinically, many patients need to breathe forcefully to inhale gas, which also leads many medical institutions to be unwilling to use this gas supply method; 2. The pressure set value is difficult to set: Different patients have different gas flow requirements, and the specific flow requirements of a patient are not accurately known to medical staff. Therefore, an excessively high pressure set value is often used in clinical practice to meet the needs as much as possible, which leads to waste of nitrous oxide and oxygen. The price of nitrous oxide is about 10 times that of oxygen, and many medical institutions hope that manufacturers can provide solutions to save on the amount of nitrous oxide used; 3. As the analgesia intensifies, the patient's need for gas will decrease, but the existing constant pressure gas supply method cannot automatically reduce the gas pressure set value according to the patient's real-time needs, which will further cause waste. Summary of the Invention

[0004] The technical problem that the invention aims to solve

[0005] To address the technical problem of the poor efficacy of traditional nitrous oxide analgesia supply methods, this invention provides an inhaled nitrous oxide analgesia device and supply method. It can provide the exact amount of nitrous oxide mixture needed by the patient without waste or causing breathing difficulties. Furthermore, as the patient's demand decreases during the analgesia process, the supply of nitrous oxide mixture can be reduced to minimize waste.

[0006] Technical solution

[0007] To solve the above problems, the technical solution provided by the present invention is as follows:

[0008] A device for inhaling nitrous oxide for pain relief includes a first three-way connector that is interconnected with each other. One end of the first three-way connector is supplied with nitrous oxide mixture through a nitrous oxide mixture output device. A one-way valve is connected to the first three-way connector. A flow meter is installed between the one-way valve and the first three-way connector. The one-way valve is connected to the atmosphere. The device also includes an inhalation device, which is connected to the first three-way connector. Finally, the device includes a control unit, which is electrically connected to the flow meter and the nitrous oxide output device.

[0009] Optionally, it also includes a second three-way connector, one end of which is connected to the first three-way connector, and the other end of which is connected to the inhalation device, and an airbag is connected to the second three-way connector.

[0010] Optionally, the inhalation device is a face mask.

[0011] Optionally, the inhalation device is a nasal mask.

[0012] Optionally, a filter element is provided between the flow meter and the check valve.

[0013] A gas supply method for the aforementioned nitrous oxide inhalation analgesia device includes, during the startup phase, a control unit controls a nitrous oxide mixture output device to output nitrous oxide mixture gas, and the output flow rate of the nitrous oxide mixture output device at this time is denoted as the initial flow rate a; the patient inhales the nitrous oxide mixture gas through the inhalation device, and the flow rate required by the patient is denoted as the demand flow rate b; when the demand flow rate b is greater than the initial flow rate a, a flow difference is generated, and a one-way valve automatically introduces atmospheric air to make up for the flow difference; the flow meter obtains the flow difference and denots it as the differential pressure flow rate c1; the flow meter feeds back the differential pressure flow rate c1 to the control unit, and the control unit controls the nitrous oxide mixture output device to increase the output flow rate, the increase being equal to the differential pressure flow rate c1.

[0014] Optionally, after the output of the nitrous oxide mixture output device remains constant during the start-up phase, the device enters the analgesia phase. The control unit controls the device to reduce the output flow rate once. If the flow meter reading is zero, the output flow rate is reduced again at interval t until the flow meter reading is not zero. At this time, a flow difference is generated between the output flow rate and the required flow rate b. The one-way valve allows atmospheric air to be introduced to automatically make up the flow difference. The flow meter obtains the flow difference and records it as differential pressure flow c2. The flow meter feeds back the differential pressure flow c2 to the control unit, which then controls the device to increase the output flow rate. The increase is equal to the differential pressure flow c2.

[0015] Optionally, the interval t is two minutes.

[0016] Beneficial effects

[0017] Compared with the prior art, the technical solution provided by this invention has the following advantages:

[0018] Addressing the technical problem of the poor effectiveness of traditional nitrous oxide analgesia supply methods, this invention can provide the exact amount of nitrous oxide mixture needed by the patient, without causing waste or difficulty breathing. Furthermore, as the patient's demand decreases during the analgesia process, the supply of nitrous oxide mixture can be reduced, minimizing waste. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an inhaled nitrous oxide analgesia device proposed in an embodiment of the present invention. Detailed Implementation

[0020] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings and embodiments.

[0021] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. The terms "first," "second," etc., used in this invention are for the convenience of describing the technical solutions of the invention and have no specific limiting effect; they are all general terms and do not constitute a limitation on the technical solutions of the invention. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, not to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Multiple technical solutions in the same embodiment, as well as multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions that do not contradict or conflict, all of which are within the scope of protection claimed by this invention.

[0022] Example 1

[0023] Combined with appendix Figure 1 This embodiment proposes an inhalation analgesia device for nitrous oxide, including a first three-way connector 101 interconnected with each other. One end of the first three-way connector 101 is supplied with nitrous oxide mixture through a nitrous oxide mixture output device. A one-way valve 100 is connected to the first three-way connector 101. A flow meter 103 is provided between the one-way valve 100 and the first three-way connector 101. The one-way valve 103 is connected to the atmosphere. The device also includes an inhalation device 104, which is connected to the first three-way connector 101. Finally, the device includes a control unit, which is electrically connected to the flow meter 103 and the nitrous oxide mixture output device.

[0024] This embodiment of an inhaled nitrous oxide analgesia device can provide the exact amount of nitrous oxide mixture needed by the patient without causing waste or difficulty breathing. Furthermore, as the patient's demand decreases during the analgesia process, the supply of nitrous oxide mixture can be reduced to minimize waste.

[0025] In this embodiment, the nitrous oxide mixture supplied by the nitrous oxide mixture output device reaches the inhalation device 104 through the first three-way connector 101 and is ultimately inhaled by the patient. When the patient inhales, if the flow rate of the nitrous oxide mixture supplied by the nitrous oxide mixture output device is insufficient, a negative pressure will be formed. At this time, atmospheric air enters the first three-way structure through the one-way valve 100 and the flow meter 103 to supplement the gas flow. The amount of atmospheric compensation at this time is exactly the difference between the patient's required amount and the amount of nitrous oxide mixture output by the nitrous oxide mixture output device.

[0026] The flow meter 103 can detect this difference in real time. After the control unit obtains the reading of the flow meter 103, it can control the nitrous oxide mixed gas output device to increase the output of the nitrous oxide mixed gas until the reading of the flow meter 103 is 0. The flow rate of the nitrous oxide mixed gas at this time is recorded. After that, the system will continue to output this flow rate value. At this time, the flow rate of the nitrous oxide mixed gas provided by the nitrous oxide mixed gas output device is exactly the flow rate that the patient actually needs. At this time, the patient does not need to inhale forcefully.

[0027] During the procedure, the control unit can attempt to slightly reduce the supply flow rate of the nitrous oxide mixture at intervals. If the flow meter 103 reads 0 after reducing the supply flow rate, the supply flow rate of the nitrous oxide mixture will continue to be reduced.

[0028] When the reading of flow meter 103 is not 0, it indicates that the flow rate of the nitrous oxide mixture supplied by the nitrous oxide mixture output device is insufficient. At this time, immediately increase the supply of nitrous oxide mixture according to the reading of flow meter 103 until the reading of flow meter 103 returns to 0. This method can detect the actual amount of mixed gas required by the patient during analgesia, reducing waste.

[0029] An optional implementation of this embodiment also includes a second three-way connector 102. One end of the second three-way connector 102 is connected to the first three-way connector 101, and the other end of the second three-way connector 102 is connected to the inhalation device 104. An air bag 105 is connected to the second three-way connector 102. In this embodiment, the air bag 105 connected to the second three-way connector 102 can store a certain amount of nitrous oxide mixture, providing buffering during gas supply, making the patient's breathing more comfortable, and also allowing medical staff to easily sense whether the patient is still breathing through the contraction and expansion of the air bag 105.

[0030] As an optional embodiment of this example, the inhalation device 104 is a face mask.

[0031] As an optional embodiment of this example, the inhalation device 104 is a nasal mask.

[0032] In an optional embodiment of this invention, a filter element is provided between the flow meter 103 and the one-way valve 100. The filter element is used to filter impurities in the atmosphere. In one embodiment, the filter element can be a filter device with a wetting function to lubricate the nitrous oxide.

[0033] Example 2

[0034] Combined with appendix Figure 1 This embodiment proposes a gas supply method for the nitrous oxide inhalation analgesia device described in Embodiment 1. During the startup phase, the control unit controls the nitrous oxide mixture output device to output nitrous oxide mixture gas, and the output flow rate of the nitrous oxide mixture output device at this time is denoted as the initial flow rate a. The patient inhales the nitrous oxide mixture gas through the inhalation device 104, and the flow rate required by the patient is denoted as the demand flow rate b. When the demand flow rate b is greater than the initial flow rate a, a flow difference is generated. The one-way valve 100 automatically replenishes the flow difference by introducing atmospheric air. The flow meter 103 acquires the flow difference and denots it as the differential pressure flow rate c1. The flow meter 103 feeds back the differential pressure flow rate c1 to the control unit, and the control unit controls the nitrous oxide mixture output device to increase the output flow rate, with the increase equal to the differential pressure flow rate c1.

[0035] This embodiment provides a gas supply method for the startup phase of a nitrous oxide analgesia device. Initially, the control unit controls the nitrous oxide mixture output device to output a nitrous oxide mixture, providing a small gas flow rate initially insufficient to meet the patient's full needs; this flow rate is denoted as initial flow rate a. As the patient gradually inhales the nitrous oxide mixture, a negative pressure arises within the device due to the small initial flow rate a, which is less than the patient's required flow rate b. This negative pressure draws atmospheric air into the device through the one-way valve 100, flow meter 103, and three-way valve 1, replenishing the negative pressure created by the inhaled gas. The flow meter 103 measures the flow difference, denoted as differential pressure flow rate c1. Based on the real-time differential pressure flow rate c1 monitored by the flow meter 103, the control unit increases the output flow rate of the nitrous oxide mixture output device until the flow meter reading reaches zero, with the increase equal to the differential pressure flow rate c1. At this point, the nitrous oxide mixture flow rate provided by the nitrous oxide analgesia device is exactly the patient's required amount. This avoids waste and minimizes breathing difficulties for the patient.

[0036] As an optional implementation method in this embodiment, after the output of the nitrous oxide mixture output device remains constant during the startup phase, the device enters the analgesia phase. The control unit controls the device to reduce the output flow rate once. If the flow meter 103 reading is zero, the output flow rate is reduced again after an interval t until the flow meter 103 reading is not zero. At this time, a flow difference is generated between the output flow rate and the required flow rate b. The one-way valve 100 introduces atmospheric air to automatically make up the flow difference. The flow meter 103 obtains the flow difference and records it as the differential pressure flow rate c2. The flow meter 103 feeds back the differential pressure flow rate c2 to the control unit, which then controls the device to increase the output flow rate by an amount equal to the differential pressure flow rate c2. After the output of the nitrous oxide mixture output device remains constant, the startup phase of the nitrous oxide analgesia device ends. As the analgesia intensifies, the patient's demand for gas decreases, entering the analgesia phase.

[0037] During the analgesia phase, at regular intervals t, the control unit controls the nitrous oxide mixture output device to reduce the output flow rate by a certain amount.

[0038] If the reading of flow meter 103 is 0, it means that the patient no longer needs to reduce this part of the flow. After the interval t, you should continue to try to slightly reduce the output flow of the nitrous oxide mixture.

[0039] If the reading of flowmeter 103 is not 0, it indicates that the output flow rate of the nitrous oxide mixture is less than the patient's required flow rate b. At this point, a flow difference is created between the output flow rate and the required flow rate b. One-way valve 100 automatically introduces atmospheric air to compensate for this difference. Flowmeter 103 captures this flow difference and records it as differential pressure flow rate c2. Flowmeter 103 feeds back the differential pressure flow rate c2 to the control unit. The control unit then controls the nitrous oxide mixture output device to increase the output flow rate until the reading of flowmeter 103 reaches 0, with the increase equal to the differential pressure flow rate c2. At this point, the flow rate of the nitrous oxide mixture provided by the nitrous oxide analgesia device is exactly what the patient needs. This avoids waste and minimizes breathing difficulties for the patient.

[0040] As an optional implementation method in this embodiment, the interval time t is two minutes. In this embodiment, the time interval t is preferably two minutes, which is determined based on the changes in the nitrous oxide demand of most patients during actual treatment. If the interval time is too long, the patient may no longer need the corresponding supply of nitrous oxide, the adjustment feedback will be too slow, and it will easily lead to waste of nitrous oxide; if the interval time is too short, the adjustment feedback will be too frequent, which will easily affect the analgesic effect and make the patient feel uncomfortable.

[0041] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A device for inhaling nitrous oxide for pain relief, characterized in that, The device includes a first three-way connector that is interconnected with each other. One end of the first three-way connector is supplied with nitrous oxide mixed gas through a nitrous oxide mixed gas output device. A one-way valve is connected to the first three-way connector. A flow meter is installed between the one-way valve and the first three-way connector. The one-way valve is connected to the atmosphere. It also includes an inhalation device, the first three-way connector being connected to the inhalation device; and a control unit, the control unit being electrically connected to a flow meter and a nitrous oxide output device. During the startup phase, the control unit controls the nitrous oxide mixture output device to output nitrous oxide mixture, and the output flow rate of the nitrous oxide mixture output device at this time is denoted as the initial flow rate a. The patient inhales the nitrous oxide mixture through the inhalation device, and the flow rate required by the patient is denoted as the demand flow rate b. When the demand flow rate b is greater than the initial flow rate a, a flow difference is generated. The one-way valve automatically replenishes the flow difference by introducing atmospheric air. The flow meter obtains the flow difference and denots it as the differential pressure flow rate c1. The flow meter feeds back the differential pressure flow rate c1 to the control unit, and the control unit controls the nitrous oxide mixture output device to increase the output flow rate. The increased output flow rate is equal to the differential pressure flow rate c1. When the output of the nitrous oxide mixture output device remains constant during the startup phase, the device enters the analgesia phase. The control unit controls the nitrous oxide mixture output device to reduce the output flow rate once. If the flow meter reading is zero, the output flow rate is reduced again at interval t until the flow meter reading is not zero. At this time, a flow difference is generated between the output flow rate and the required flow rate b. The one-way valve allows atmospheric air to be introduced to make up the flow difference. The flow meter obtains the flow difference and records it as differential pressure flow c2. The flow meter feeds back the differential pressure flow c2 to the control unit, and the control unit controls the nitrous oxide mixture output device to increase the output flow rate. The increased output flow rate is equal to the differential pressure flow c2.

2. The inhalation nitrous oxide analgesia device according to claim 1, characterized in that, It also includes a second three-way connector, one end of which is connected to the first three-way connector, and the other end of which is connected to the inhalation device. An airbag is connected to the second three-way connector.

3. The inhaled nitrous oxide analgesia device according to claim 1, characterized in that, The inhalation device is a face mask.

4. The inhalation nitrous oxide analgesia device according to claim 1, characterized in that, The inhalation device is a nasal mask.

5. The inhalation nitrous oxide analgesia device according to claim 1, characterized in that, A filter element is installed between the flow meter and the check valve.

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