CN116710165A - Paramagnetic gas measuring device and medical ventilation system - Google Patents
Paramagnetic gas measuring device and medical ventilation system Download PDFInfo
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- CN116710165A CN116710165A CN202080107364.3A CN202080107364A CN116710165A CN 116710165 A CN116710165 A CN 116710165A CN 202080107364 A CN202080107364 A CN 202080107364A CN 116710165 A CN116710165 A CN 116710165A
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- 230000005298 paramagnetic effect Effects 0.000 title claims abstract description 42
- 238000009423 ventilation Methods 0.000 title claims abstract description 34
- 230000005291 magnetic effect Effects 0.000 claims abstract description 51
- 238000005259 measurement Methods 0.000 claims abstract description 39
- 230000029058 respiratory gaseous exchange Effects 0.000 claims description 38
- 125000006850 spacer group Chemical group 0.000 claims description 7
- 238000007789 sealing Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 268
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 20
- 239000001301 oxygen Substances 0.000 description 20
- 229910052760 oxygen Inorganic materials 0.000 description 20
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 238000005070 sampling Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 206010002091 Anaesthesia Diseases 0.000 description 1
- 230000037005 anaesthesia Effects 0.000 description 1
- 230000005690 magnetoelectric effect Effects 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 239000011185 multilayer composite material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N24/00—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects
- G01N24/10—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects by using electron paramagnetic resonance
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- Emergency Medicine (AREA)
- Heart & Thoracic Surgery (AREA)
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- Engineering & Computer Science (AREA)
- Animal Behavior & Ethology (AREA)
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- Veterinary Medicine (AREA)
- Anesthesiology (AREA)
- High Energy & Nuclear Physics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
A paramagnetic gas measurement device (100) and a medical ventilation system, the measurement device (100) comprising: a magnetic device (110), a sample gas channel (120), a first connection channel (130); the magnetic device (110) has an air gap portion (111) capable of providing a magnetic field, and the sample gas channel (120) is capable of being connected to a sample gas source for flowing the sample gas into the air gap portion (111); the first connecting channel (130) is connected with the air gap part (111) and is not communicated, and the first connecting channel (130) can transmit the gas pressure change of the sample gas in the air gap part (111); the first connecting channel (130) is provided with a first sensor (140), the first sensor (140) is used for collecting a first gas pressure signal on the first connecting channel (130), and the first gas pressure signal is used for determining the concentration of paramagnetic gas in the sample gas. The reference gas is not required to be introduced into the magnetic field air gap, the sealing performance of the air path system is better, and the problem that concentration is polluted due to the fact that the reference gas and the sample gas are conducted in the magnetic field air gap can be avoided.
Description
The application relates to the technical field of gas detection, in particular to a paramagnetic gas measuring device and a medical ventilation system.
The paramagnetic gas concentration in the mixed gas is measured by utilizing the paramagnetic property of paramagnetic gas molecules such as oxygen molecules, and the magnetoacoustic pressure method is a rapid, real-time and reliable measuring method, wherein the magnetoacoustic pressure method is a method in which the commercial products are more mature and successful. However, in the current measurement system of the magnetoacoustic pressure method, reference gas and sample gas are simultaneously introduced into a magnetic field air gap for measurement, a path of reference gas is required to be continuously introduced from the outside to finish the function of measuring the paramagnetic gas concentration, the closure of a gas path system can be destroyed by the continuous external reference gas introduction, the balance of the gas concentration in the system can be influenced by the external air introduction, and the sampling of the reference gas can be influenced when the pressure in the system fluctuates due to the fact that the reference channel is always communicated with the atmosphere, so that measurement is inaccurate or even impossible.
Disclosure of Invention
The application provides a paramagnetic gas measuring device and a medical ventilation system, which can measure the concentration of paramagnetic gas in sample gas without introducing reference gas.
In a first aspect, an embodiment of the present application provides a paramagnetic gas measurement apparatus, including:
a magnetic device having an air gap portion capable of providing a magnetic field;
a sample gas channel connectable to a sample gas source for circulating a sample gas into the air gap portion;
a first connection channel connected to and not communicating with the air gap portion, the first connection channel being capable of transmitting a gas pressure change of the sample gas in the air gap portion; the first connecting channel is provided with a first sensor, the first sensor is used for collecting a first gas pressure signal on the first connecting channel, and the first gas pressure signal is used for determining the concentration of paramagnetic gas in sample gas.
In a second aspect, an embodiment of the present application provides a paramagnetic gas measurement apparatus, including:
a magnetic device having an air gap portion capable of providing a magnetic field;
a sample gas channel connectable to a sample gas source for circulating a sample gas into the air gap portion;
the first connecting channel is connected with the sample gas channel and is not communicated with the sample gas channel, the first connecting channel can transmit the gas pressure change of the sample gas in the air gap part, and a first sensor is further arranged on the first connecting channel and is used for collecting a first gas pressure signal on the first connecting channel;
and the processor is connected with the first sensor and is used for determining the concentration of paramagnetic gas in the sample gas according to the first gas pressure signal.
In a third aspect, embodiments of the present application provide a medical ventilation system comprising at least one air supply interface, at least one air supply branch and a breathing circuit respectively connected to the at least one air supply interface;
wherein the at least one gas supply branch is capable of outputting gas to the breathing circuit, which is connected to the aforementioned measuring device.
The embodiment of the application provides a paramagnetic gas measuring device and a medical ventilation system, which comprise a magnetic device for providing a magnetic field, a sample gas channel for allowing sample gas to circulate to an air gap part of the magnetic device, and a first connecting channel which is connected with the air gap part and is not communicated with the air gap part, wherein the first connecting channel can transmit the gas pressure change of the sample gas in the air gap part; the first gas pressure signal on the first connection channel is acquired by a first sensor arranged on the first connection channel, and can be used for determining the concentration of paramagnetic gas in the sample gas. The reference gas is not required to be introduced into the magnetic field air gap, the sealing performance of the air path system is better, and the problem that concentration is polluted due to the fact that the reference gas and the sample gas are conducted in the magnetic field air gap can be avoided.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure of embodiments of the application.
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a paramagnetic gas measurement apparatus according to an embodiment of the present application;
FIG. 2 is a schematic illustration of a medical ventilation system according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a measuring apparatus according to an embodiment;
FIG. 4 is a schematic view of the structure of a measuring device according to another embodiment;
fig. 5 is a schematic structural view of a measuring device according to still another embodiment.
Reference numerals illustrate: 100. a measuring device; 110. a magnetic device; 111. an air gap portion; 120. a sample gas channel; 130. a first connection channel; 131. a spacer; 1311. a diaphragm; the method comprises the steps of carrying out a first treatment on the surface of the 140. A first sensor; 150. a second connection channel; 160. a third connecting channel; 170. a second sensor; 10. a processor; 132. a passage communicating with the atmosphere; 210. an air source interface; 220. a gas supply branch; 230. a breathing circuit; 231. an air suction branch; 232. an exhalation branch; 233. a ventilation main air path; 240. a gas control device; 201. a processor.
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The flow diagrams depicted in the figures are merely illustrative and not necessarily all of the elements and operations/steps are included or performed in the order described. For example, some operations/steps may be further divided, combined, or partially combined, so that the order of actual execution may be changed according to actual situations.
Some embodiments of the present application are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a paramagnetic gas measurement apparatus 100 according to an embodiment of the application.
In some embodiments, the measurement device 100 may be used in a medical ventilation system, such as an anesthesia machine or a ventilator, for measuring oxygen concentration.
A schematic structural diagram of a medical ventilation system in an embodiment is shown in fig. 2. The medical ventilation system comprises at least one air supply interface 210, at least one air supply branch 220 connected to the at least one air supply interface 210, respectively, and a breathing circuit 230.
In particular, at least one gas supply branch 220 is capable of outputting gas to a breathing circuit 230. The oxygen concentration of the gas of the breathing circuit 230 may be adjusted by controlling the at least one gas supply branch 220 to output gas to the breathing circuit 230.
Wherein the breathing circuit 230 is connected to the measuring device 100 according to the embodiment of the present application.
Illustratively, the breathing circuit 230 is coupled to the measurement device 100 via a sampling tube that outputs a sample gas to the measurement device 100. For example, the breathing circuit 230 is connected to a gas channel of the measuring device 100 for transporting a sample gas.
In some embodiments, the breathing circuit 230 includes an inhalation branch 231, an exhalation branch 232, and a ventilation main air circuit 233. At least one of the inhalation branch 231, the exhalation branch 232, and the ventilation main air path 233 is connected to the measurement device 100, and the oxygen concentration of the gas at the corresponding position in the breathing circuit 230 is detected by the measurement device 100.
Illustratively, as shown in fig. 2, the main ventilation path 233 is connected to the measuring device 100 through a sampling tube, and a part of the gas in the main ventilation path 233 is inputted as a sample gas into the measuring device 100, and the oxygen concentration is measured by the measuring device 100.
Illustratively, the medical ventilation system further comprises a gas control device 240, the gas control device 240 and the breathing circuit 230 being connected to at least one gas supply branch 220, respectively; the gas control device 240 controls the gas output by the at least one gas supply branch 220 to the breathing circuit 230.
Illustratively, air may be output to the breathing circuit 230 via one of the air supply interfaces 210 via its air supply branch 220; pure oxygen may be output to the breathing circuit 230 via its gas supply branch 220 through another gas source interface 210.
Illustratively, the gas control device 240 is capable of controlling the opening of the at least one gas supply branch 220 to regulate the oxygen concentration of the gas output to the breathing circuit 230.
In some embodiments, the medical ventilation system further includes a processor 201, the processor 201 may be disposed in the gas control device 240, for example, or may be disposed on a control board external to the gas control device 240.
Specifically, the processor 201 may be a Micro-controller Unit (MCU), a central processing Unit (Central Processing Unit, CPU), a digital signal processor (Digital Signal Processor, DSP), or the like.
Illustratively, the measurement device 100 is electrically connected to the gas control device 240 and/or the processor 201 and is capable of transmitting oxygen concentration data of the breathing circuit 230 to the gas control device 240 and/or the processor 201 so that the gas control device 240 and/or the processor 201 adjusts the oxygen concentration of the gas output to the breathing circuit 230.
As shown in fig. 1, the measuring device 100 of the embodiment of the present application includes a magnetic device 110, a sample gas channel 120, a first connection channel 130, and a first sensor 140 disposed on the first connection channel 130.
The magnetic device 110 has an air gap 111 capable of providing a magnetic field.
The magnetic means 110 comprises, for example, a permanent magnet or an electromagnet, with an air gap portion 111 capable of providing a constant or alternating magnetic field.
As shown in fig. 1, the sample gas channel 120 can be connected to a sample gas source for circulating the sample gas into the air gap portion 111.
Illustratively, the sample gas channel 120 is open at a position near the air gap portion 111 so that the sample gas flows into the air gap portion 111. The magnetic field of the magnetic device 110 may not act on the sample gas through the side wall of the sample gas channel 120, and the magneto-acoustic pressure effect is stronger.
For example, a cavity having several openings may be configured at the air gap portion 111, such as by a combination of a seal and the magnetic device 110, to configure a cavity surrounding the magnetic field air gap, with one opening for connecting the air inlet channel of the sample gas channel 120 so that the sample gas channel 120 passes sample gas out into the air gap portion 111. Illustratively, the chamber also has an opening for connecting with an outlet channel of the sample gas channel 120 so that the sample gas in the air gap portion 111 is discharged through the outlet channel.
For example, the sample gas channel 120 may be provided at least partially in the air gap 111 without being opened. For example, the middle portion of the sample gas channel 120 is provided in the air gap portion 111, or the air outlet end of the sample gas channel 120 is provided in the air gap portion 111.
The sample gas channel 120 is for guiding the sample gas to the air gap portion 111. The sample gas is the gas with the concentration to be measured. Specifically, the air inlet end of the sample gas channel 120 is connected to an air source of sample gas, where the air source includes at least one of a gas tank, a gas pump, and a gas valve.
Illustratively, when the sample gas is introduced into the air gap 111, oxygen molecules will generate a pressure difference in the magnetic field with respect to the outside of the air gap 111, and the magnitude of the pressure difference is related to the concentration of oxygen. When the sample gas is transmitted to the air gap 111, a change in sound pressure is generated by the magnetic field, which may be referred to as a magnetoacoustic pressure. When the magnetic field is kept at a certain level, the magnetoacoustic pressures caused by the gases with different concentrations are different, so that the concentration of paramagnetic gas in the gas can be determined according to the detected magnetoacoustic pressures. For example, the concentration of paramagnetic gas in the sample gas may be determined based on the corresponding magnetoacoustic pressure of the sample gas.
Specifically, as shown in fig. 1 and 2 to 5, the first connection channel 130 is connected to and does not communicate with the air gap 111, and the first connection channel 130 is capable of transmitting a change in the gas pressure of the sample gas in the air gap 111.
Illustratively, a chamber having a plurality of openings is constructed in the air gap portion 111, one of which is connected to the first connection passage 130 to transmit a gas pressure change of the sample gas in the air gap portion 111 through the first connection passage 130.
Specifically, the first connection channel 130 is provided with a first sensor 140.
For example, the first sensor 140 may be disposed inside the first connection channel 130, in a sidewall of the first connection channel 130, or on an inner sidewall or an outer sidewall of the first connection channel 130.
The first connection path 130 can transmit the magnetoacoustic pressure of the air gap 111 to the first sensor 140. The first sensor 140 is configured to acquire a first gas pressure signal (or referred to as a magnetoacoustic pressure) on the first connection channel 130, where the first gas pressure signal is used to determine a concentration of paramagnetic gas in the sample gas.
The first sensor 140 illustratively includes a sound pressure sensor and/or a microphone. The first sensor 140 can generate an electrical signal from the sound pressure of the first connection channel 130, for example, a gas pressure signal from a voltage caused by the sound pressure, a capacitance signal, a magneto-electric effect, or the like.
In some embodiments, the first sensor 140 comprises a microphone and the magnetic device 110 comprises an electromagnet. When the magnetic device 110 includes an electromagnet, the air gap 111 provides an alternating magnetic field, and the microphone can output an audio signal as a gas pressure signal.
The first connection channel 130 is connected to one side of the air gap 111 to transmit the change of the magneto-acoustic pressure, but since the first connection channel 130 is not connected to the air gap 111, the sample gas in the air gap 111 is not conducted into the first connection channel 130, the concentration of the paramagnetic gas in the sample gas can be determined by detecting the change of the magneto-acoustic pressure in the first connection channel 130, the reference gas is not required to be introduced into the air gap 111, the air path system has better sealing performance, and the problem that the concentration is polluted due to the conduction of the reference gas and the sample gas in the air gap 111 can be avoided.
In some embodiments, as shown in fig. 1, 2 to 5, the first connection channel 130 is provided with a separator 131 at a side near the air gap portion 111 for making the first connection channel 130 not communicate with the air gap portion 111, and the first connection channel 130 can transmit a gas pressure change of the sample gas in the air gap portion 111 through the separator 131. For example, a spacer 131 is provided at an end of the first connection passage 130 extending into the air gap portion 111 to separate the air in the first connection passage 130 from the air in the air gap portion 111.
Illustratively, the spacer 131 may include a diaphragm 1311, a diaphragm, etc., may be a metallic material or a non-metallic material, etc., or may be a multi-layer composite material. For example, the spacer 131 may be fixed to the inner sidewall of the first connection channel 130, or to the outer sidewall of the first connection channel 130, or to the end of the first connection channel 130.
Illustratively, the first connection channel 130 is provided with a diaphragm 1311 at one end thereof connected to the air gap portion 111, the diaphragm 1311 isolating the sample gas from the first connection channel 130 and converting a gas pressure variation of the sample gas in the air gap portion 111 into a gas pressure variation of the sample gas in the first connection channel 130 so that the first sensor 140 collects a gas pressure signal through the first connection channel 130.
In some embodiments, the first sensor 140 is disposed on a side of the first connection channel 130 remote from the air gap portion 111. Specifically, the pressure signal in the magnetic field of the air gap portion 111 is led out to the first sensor 140 through the first connection channel 130 to be measured. The first connection passage 130 can conduct vibration of the spacer 131 caused by the magneto-acoustic pressure at the air gap portion 111 to the first sensor 140, so that the first sensor 140 outputs a first gas pressure signal.
In some embodiments, the first connection channel 130 is a closed gas channel, and the first connection channel 130 contains a predetermined concentration of gas therein. The predetermined concentration may be a known concentration of paramagnetic gas, for example, 0 to 100%, such as 21%, and the gas contained in the first connection channel 130 may be air, nitrogen, or the like, but may be any other known oxygen concentration. By keeping the concentration of paramagnetic gas in the first connection passage 130 unchanged, the accuracy of concentration detection can be improved. The pressure stability of the gas in the first connecting channel 130 can be maintained when the first connecting channel 130 is closed, and the accuracy of concentration detection can be improved.
In some embodiments, as shown in fig. 3, the first connection channel 130 is provided with a through hole for communicating with the atmosphere and/or a channel 132 communicating with the atmosphere. So that the first connection channel 130 can accommodate a gas having a concentration communicating with the atmosphere. By keeping the concentration of the paramagnetic gas in the first connection passage 130 constant, the accuracy of concentration detection can be improved, and the pressure of the gas in the first connection passage 130 is kept stable as the atmospheric pressure is equal, and the accuracy of concentration detection can also be improved.
In some embodiments, as shown in fig. 4, the first sensor 140 is further connected to a sample gas source, and the first gas pressure signal collected by the first sensor 140 is used to indicate a pressure difference between the sample gas provided by the sample gas source and the gas on the first connection channel 130, where the magnitude of the pressure difference is related to the concentration of oxygen. When determining the concentration of the sample gas from the first gas pressure signal acquired by the first sensor 140, the effect of the sample gas flow rate and/or pressure variations may be eliminated or reduced.
Illustratively, as shown in FIG. 4, the first sensor 140 is also connected to a sample gas source via a second connecting channel 150.
For example, the first sensor 140 includes a differential pressure sensor including two input interfaces, one of which communicates with the first connecting passage 130 and the other communicates with a portion of the sample gas passage 120 remote from the air gap portion 111. The first gas pressure signal acquired by the first sensor 140 can thus determine the pressure difference of the sample gas at the air gap 111 relative to the sample gas outside the air gap 111, the magnitude of which pressure difference has a correlation with the concentration of oxygen. Illustratively, the portion of the sample gas channel 120 distal from the air gap portion 111 includes a portion of the sample gas channel 120 that is closer to the sample gas source than the air gap portion 111.
Illustratively, the first sensor 140 is coupled to a portion of the sample gas channel 120 remote from the air gap 111 via the second connection channel 150, and the first gas pressure signal collected by the first sensor 140 is used to indicate a pressure difference between the gas on the sample gas channel 120 and the gas on the first connection channel 130. It is only necessary to connect a sample gas source through the gas inlet end of the sample gas channel 120. Of course, in other embodiments, the second connection channel 150 and the sample gas channel 120 may be connected to a sample gas source, respectively.
In some embodiments, as shown in fig. 5, the measurement device 100 further includes a third connection channel 160. One end of the third connecting channel 160 is connected with a part of the sample gas channel 120 far away from the air gap 111, and the other end is provided with a second sensor 170, wherein the second sensor 170 is used for collecting a second gas pressure signal on the third connecting channel 160, and the second gas pressure signal is used for combining the first gas pressure signal to determine the concentration of paramagnetic gas in the sample gas.
For example, the pressure difference between the sample gas provided by the sample gas source and the gas on the first connection 130 may be determined based on the first gas pressure signal and the second gas pressure signal, e.g. based on the difference between the first gas pressure signal and the second gas pressure signal, the magnitude of the pressure difference being related to the concentration of oxygen. When determining the concentration of the sample gas from the first gas pressure signal acquired by the first sensor 140, the effect of the sample gas flow rate and/or pressure variations may be eliminated or reduced.
In some embodiments, referring to fig. 4 or 5, a through hole for communicating with the atmosphere and/or a passage 132 communicating with the atmosphere may be provided on the first connection passage 130, so that the first connection passage 130 accommodates a gas having a concentration communicating with the atmosphere.
In some embodiments, as shown in fig. 1, 2-5, the measurement device 100 further comprises a processor 10, the processor 10 being connected to the first sensor 140, or to the first sensor 140 and the second sensor 170, for determining the concentration of paramagnetic gas in the sample gas from the gas pressure signals of the sensors.
Of course, the measuring device 100 may not include the processor 10. For example, in other embodiments, as shown in fig. 2, when the measurement device 100 is used in a medical ventilation system, the first sensor 140 is connected to the processor 201 in the medical ventilation system, and the processor 201 in the medical ventilation system determines the concentration of paramagnetic gas in the sample gas according to the gas pressure signal from the first sensor 140.
For example, the paramagnetic gas concentration of the corresponding function of the currently detected gas pressure signal, that is, the concentration of the paramagnetic gas in the current sample gas, can be determined according to a mapping table of pre-stored gas pressure signals and paramagnetic gas concentrations.
The paramagnetic gas measuring device provided by the embodiment of the application comprises a magnetic device for providing a magnetic field, a sample gas channel for allowing sample gas to circulate to an air gap part of the magnetic device, and a first connecting channel which is connected with the air gap part and is not communicated with the air gap part, wherein the first connecting channel can transmit the gas pressure change of the sample gas in the air gap part; the first gas pressure signal on the first connection channel is acquired by a first sensor arranged on the first connection channel, and can be used for determining the concentration of paramagnetic gas in the sample gas. The reference gas is not required to be introduced into the magnetic field air gap, the sealing performance of the air path system is better, and the problem that concentration is polluted due to the fact that the reference gas and the sample gas are conducted in the magnetic field air gap can be avoided.
Referring to fig. 1, 2 to 5 in combination with the above embodiments, the measurement apparatus 100 includes:
a magnetic device 110, the magnetic device 110 having an air gap portion 111 capable of providing a magnetic field;
a sample gas channel 120, the sample gas channel 120 being connectable to a sample gas source for flowing a sample gas into the air gap portion 111;
the first connecting channel 130, the first connecting channel 130 is connected with the air gap part 111 and is not communicated with the first connecting channel 130, so that the gas pressure change of the sample gas in the air gap part 111 can be transmitted, the first connecting channel 130 is also provided with a first sensor 140, and the first sensor 140 is used for collecting a first gas pressure signal on the first connecting channel 130;
processor 10, processor 10 is connected to first sensor 140 for determining the concentration of paramagnetic gas in the sample gas based on the first gas pressure signal.
Specifically, the processor 10 may be a Micro-controller Unit (MCU), a central processing Unit (Central Processing Unit, CPU), a digital signal processor (Digital Signal Processor, DSP), or the like.
The specific principle and implementation manner of the measuring device provided by the embodiment of the present application are similar to those of the measuring device of the foregoing embodiment, and are not repeated here.
Referring to fig. 2 in combination with the above embodiments, fig. 2 is a schematic structural diagram of a medical ventilation system according to an embodiment of the application.
As shown in fig. 2, the medical ventilation system includes at least one air supply port 210, at least one air supply branch 220 respectively connected to the at least one air supply port 210, and a breathing circuit 230.
In particular, at least one gas supply branch 220 is capable of outputting gas to a breathing circuit 230. The oxygen concentration of the gas of the breathing circuit 230 may be adjusted by controlling the at least one gas supply branch 220 to output gas to the breathing circuit 230.
Wherein the breathing circuit 230 is connected to the measuring device 100 according to the embodiment of the present application.
Illustratively, the breathing circuit 230 is coupled to the measurement device 100 via a sampling tube that outputs a sample gas to the measurement device 100. For example, the breathing circuit 230 is connected to a gas channel of the measuring device 100 for transporting a sample gas.
In some embodiments, the breathing circuit 230 includes an inhalation branch 231, an exhalation branch 232, and a ventilation main air circuit 233. At least one of the inhalation branch 231, the exhalation branch 232, and the ventilation main air path 233 is connected to the measurement device 100, and the oxygen concentration of the gas at the corresponding position in the breathing circuit 230 is detected by the measurement device 100.
Illustratively, as shown in fig. 2, the main ventilation path 233 is connected to the measuring device 100 through a sampling tube, and a part of the gas in the main ventilation path 233 is inputted as a sample gas into the measuring device 100, and the oxygen concentration is measured by the measuring device 100.
Illustratively, the medical ventilation system further comprises a gas control device 240, the gas control device 240 and the breathing circuit 230 being connected to at least one gas supply branch 220, respectively; the gas control device 240 controls the gas output by the at least one gas supply branch 220 to the breathing circuit 230.
Illustratively, air may be output to the breathing circuit 230 via one of the air supply interfaces 210 via its air supply branch 220; pure oxygen may be output to the breathing circuit 230 via its gas supply branch 220 through another gas source interface 210.
Illustratively, the gas control device 240 is capable of controlling the opening of the at least one gas supply branch 220 to regulate the oxygen concentration of the gas output to the breathing circuit 230.
In some embodiments, the medical ventilation system further includes a processor 201, the processor 201 may be disposed in the gas control device 240, for example, or may be disposed on a control board external to the gas control device 240.
Specifically, the processor 201 may be a Micro-controller Unit (MCU), a central processing Unit (Central Processing Unit, CPU), a digital signal processor (Digital Signal Processor, DSP), or the like.
Illustratively, the measurement device 100 is electrically connected to the gas control device 240 and/or the processor 201 and is capable of transmitting oxygen concentration data of the breathing circuit 230 to the gas control device 240 and/or the processor 201 so that the gas control device 240 and/or the processor 201 adjusts the oxygen concentration of the gas output to the breathing circuit 230.
The specific principle and implementation manner of the medical ventilation system provided by the embodiment of the application are similar to those of the measurement device of the previous embodiment, and are not repeated here.
The embodiment of the application provides a medical ventilation system, wherein a paramagnetic gas measuring device comprises a magnetic device for providing a magnetic field, a sample gas channel for allowing sample gas to circulate to an air gap part of the magnetic device, and a first connecting channel which is connected with the air gap part and is not communicated with the air gap part, wherein the first connecting channel can transmit gas pressure change of the sample gas in the air gap part; the first gas pressure signal on the first connection channel is acquired by a first sensor arranged on the first connection channel, and can be used for determining the concentration of paramagnetic gas in the sample gas. The reference gas is not required to be introduced into the magnetic field air gap, the sealing performance of the air path system is better, and the problem that the concentration is polluted due to the conduction of the reference gas and the sample gas in the magnetic field air gap can be avoided, so that the safety and the reliability of the medical ventilation system can be improved.
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It should also be understood that the term "and/or" as used in the present application and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
While the application has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the application. Therefore, the protection scope of the application is subject to the protection scope of the claims.
Claims (16)
- A paramagnetic gas measurement device comprising:a magnetic device having an air gap portion capable of providing a magnetic field;a sample gas channel connectable to a sample gas source for circulating a sample gas into the air gap portion;a first connection channel connected to and not communicating with the air gap portion, the first connection channel being capable of transmitting a gas pressure change of the sample gas in the air gap portion; the first connecting channel is provided with a first sensor, the first sensor is used for collecting a first gas pressure signal on the first connecting channel, and the first gas pressure signal is used for determining the concentration of paramagnetic gas in sample gas.
- The measurement device according to claim 1, wherein the first connection passage is provided with a spacer for making the first connection passage not communicate with the air gap portion on a side near the air gap portion, and the first connection passage is capable of transmitting a gas pressure change of the sample gas in the air gap portion through the spacer.
- The measurement device according to claim 2, wherein the separator includes a diaphragm at an end of the first connection passage connected to the air gap portion, the diaphragm separating the sample gas from the first connection passage, and converting a change in gas pressure of the sample gas in the air gap portion into a change in gas pressure of the sample gas in the first connection passage.
- The measurement device according to claim 1, wherein the first sensor is provided on a side of the first connection passage away from the air gap portion.
- The measurement device of claim 1, wherein the first connection channel is a closed gas channel and the first connection channel contains a predetermined concentration of gas therein.
- The measuring device according to claim 1, characterized in that the first connecting channel is provided with a through hole for communicating with the atmosphere and/or a channel communicating with the atmosphere.
- The measurement device of any one of claims 1-6, wherein the first sensor is further coupled to the sample gas source, and wherein the first gas pressure signal collected by the first sensor is used to indicate a pressure differential between the sample gas provided by the sample gas source and the gas on the first connection channel.
- The measurement device of claim 7, wherein the first sensor is further connected to the sample gas source via a second connecting channel.
- The measurement device of claim 8, wherein the first sensor is connected to a portion of the sample gas channel remote from the air gap portion via the second connection channel, and wherein a first gas pressure signal collected by the first sensor is used to indicate a pressure difference between the gas on the sample gas channel and the gas on the first connection channel.
- The measurement device of claim 7, wherein the first sensor comprises a differential pressure sensor comprising two input interfaces, one of the two input interfaces being in communication with the first connection channel and the other being in communication with a portion of the sample gas channel remote from the air gap portion.
- The measurement device of any one of claims 1-6, further comprising:and one end of the third connecting channel is connected with the part, far away from the air gap part, of the sample gas channel, and the other end of the third connecting channel is provided with a second sensor, the second sensor is used for collecting a second gas pressure signal on the third connecting channel, and the second gas pressure signal is used for determining the concentration of paramagnetic gas in the sample gas by combining the first gas pressure signal.
- The measurement device according to any one of claims 1-6, wherein the first sensor comprises a sound pressure sensor and/or a microphone.
- The measurement device of claim 12, wherein the magnetic device comprises a permanent magnet or an electromagnet.
- The measurement device of claim 13, wherein the first sensor comprises a microphone and the magnetic device comprises an electromagnet.
- A paramagnetic gas measurement device comprising:a magnetic device having an air gap portion capable of providing a magnetic field;a sample gas channel connectable to a sample gas source for circulating a sample gas into the air gap portion;the first connecting channel is connected with the air gap part and is not communicated with the air gap part, the first connecting channel can transmit the gas pressure change of the sample gas in the air gap part, and a first sensor is further arranged on the first connecting channel and is used for collecting a first gas pressure signal on the first connecting channel;and the processor is connected with the first sensor and is used for determining the concentration of paramagnetic gas in the sample gas according to the first gas pressure signal.
- A medical ventilation system, characterized in that the ventilation system comprises at least one air supply interface, at least one air supply branch and a breathing circuit, which are respectively connected with the at least one air supply interface;wherein the at least one gas supply branch is capable of outputting gas to the breathing circuit, which breathing circuit is connected to the measuring device according to any of claims 1-14.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2020/141845 WO2022141319A1 (en) | 2020-12-30 | 2020-12-30 | Paramagnetic gas measuring device and medical ventilation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116710165A true CN116710165A (en) | 2023-09-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080107364.3A Pending CN116710165A (en) | 2020-12-30 | 2020-12-30 | Paramagnetic gas measuring device and medical ventilation system |
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| Country | Link |
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| CN (1) | CN116710165A (en) |
| WO (1) | WO2022141319A1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2531849C3 (en) * | 1975-07-16 | 1978-06-01 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Device for determining the oxygen content of a gas mixture |
| US4563894A (en) * | 1984-08-21 | 1986-01-14 | Hewlett-Packard Company | Paramagnetic oxygen sensor |
| DE10241244C1 (en) * | 2002-09-06 | 2003-08-21 | Draeger Medical Ag | Measuring head for device for measuring gas concentration comprises cylindrical housing parts made from a steel alloy for receiving magnet coil bodies |
| CN104069558B (en) * | 2013-03-26 | 2016-05-11 | 旭化成医疗株式会社 | Pressure chamber |
| WO2017080884A1 (en) * | 2015-11-13 | 2017-05-18 | Eugen Kagan | Ventilator |
-
2020
- 2020-12-30 CN CN202080107364.3A patent/CN116710165A/en active Pending
- 2020-12-30 WO PCT/CN2020/141845 patent/WO2022141319A1/en active Application Filing
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| WO2022141319A1 (en) | 2022-07-07 |
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