CN107847706B - End-of-breath gas measurement system and gas sampling accessory - Google Patents
End-of-breath gas measurement system and gas sampling accessory Download PDFInfo
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- CN107847706B CN107847706B CN201580081807.5A CN201580081807A CN107847706B CN 107847706 B CN107847706 B CN 107847706B CN 201580081807 A CN201580081807 A CN 201580081807A CN 107847706 B CN107847706 B CN 107847706B
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/08—Detecting, measuring or recording devices for evaluating the respiratory organs
- A61B5/097—Devices for facilitating collection of breath or for directing breath into or through measuring devices
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
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Abstract
A breath end gas measurement system and a gas sampling accessory (7). The respiratory end gas measurement system comprises a measurement host (2) and a gas circuit switching device (1). The measurement host (2) comprises a signal processing circuit (21), an air pump (221) and a gas measurement sensor (22), wherein the signal processing circuit (21) is electrically connected with the air pump (221) and the gas measurement sensor (22) respectively. The air path switching device (1) comprises an air path interface (12) and an identification module (11). The measurement host (2) is connected with different gas sampling accessories (7) through a gas circuit interface (12), the type of the gas sampling accessories (7) is identified through an identification module (11), and then a gas measurement sensor (22) is controlled through a signal processing circuit (21), so that the working mode of the breath end gas measurement system is adjusted to be the working mode of the gas sampling accessories (7). The breath end gas measurement system is simple to use and convenient to operate, various clinical applications can be met by connecting various types of gas sampling accessories (7), and the clinical cost is reduced.
Description
Technical Field
The invention relates to the field of gas measurement, in particular to a breath end gas measurement system and a gas sampling accessory.
Background
End-of-breath gas measurement systems are used to monitor the concentration or partial pressure of gases exhaled by a living being, such as carbon dioxide, and are divided into mainstream and sidestream flow. One issue that typically needs to be considered in the design of a side-stream end-of-breath gas measurement system is: how to collect condensed water generated after saturated moisture in the exhaled air of a patient enters the environment so as to prevent the condensed water from damaging a machine after the condensed water enters the inside of a measuring system.
The side-flow end-of-breath gas measurement system adopts a gas pump and a specific gas sampling pipeline to suck a very small amount of gas from a breathing circuit for measurement, and the measured data can be used for providing clear indexes for the respiratory support and respiratory management of anesthesia patients, ICUs, respiratory departments and the like. The side-stream end-of-breath gas measurement system is subdivided into various devices according to the flow rate of the gas sample, and the commonly used devices include a high flow rate measurement system (between 70ml/min and 200 ml/min) and a low flow rate measurement system (50 ml/min).
In order to adapt to different application scenarios clinically or to consider clinical use cost, different devices are often needed to be purchased for use, which results in complex use and inconvenient operation. Or only a single device (high flow measurement system or low flow measurement system) is adopted, thereby causing the problems that the clinical application cost is too high or the application is not applicable in partial occasions.
Disclosure of Invention
According to a first aspect, an embodiment provides an end-of-breath gas measurement system, which includes a measurement host and a gas path adapter;
the measurement host comprises a signal processing circuit, an air pump and an air measurement sensor for measuring air parameters, wherein the signal processing circuit is electrically connected with the air pump and the air measurement sensor respectively;
the gas path switching device comprises a gas path interface and an identification module, wherein the first end of the gas path interface is used for being connected with a gas sampling accessory, and the second end of the gas path interface is connected to the gas measurement sensor;
the identification module is used for identifying the type of a gas sampling accessory connected with the gas circuit interface and outputting identification information, and the identification module is electrically connected with the signal processing circuit so as to transmit the identification information to the signal processing circuit.
According to a second aspect, an embodiment provides a gas sampling accessory for connection to an end-of-breath gas measurement system, comprising a gas line for collecting gas from a breathing circuit and a tagging module corresponding to a type of the gas sampling accessory and communicating information of the type of the gas sampling accessory to an identification module when the gas sampling accessory is connected to a gas circuit adapter of the end-of-breath gas measurement system.
According to last gas measurement system of breathing and gas sampling annex of above-mentioned embodiment, because the measurement host computer connects different annexes through the gas circuit interface on the gas circuit switching device, and discern the type of the gas sampling annex of being connected with gas circuit interface through the identification module on the gas circuit switching device, control gas measurement sensor through the signal processing circuit who is connected with the identification module electricity after the discernment, make this last gas measurement system of breathing's mode adjustment be the mode of operation of gas sampling annex, thereby this last gas concentration measurement system of breathing is simple to use, and convenient operation, satisfy various clinical use scenes through connecting various types of special gas sampling annex, and the measurement performance is improved, and the clinical cost is reduced.
Drawings
FIG. 1 is a block diagram of a side-stream end-of-breath gas measurement system in an embodiment of the invention;
FIG. 2 is an exploded view of a side-stream end-of-breath gas measurement system in an embodiment of the present invention;
FIG. 3 is a schematic diagram of an assembled configuration of the side-stream end-of-breath gas measurement system of FIG. 2;
FIG. 4 is a front view of a mating surface of the air path adapter according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a front view of the interface of a high flow attachment and a low flow attachment in an embodiment of the invention;
wherein, 1, the gas circuit switching device; 11. an identification module; 111. concave holes; 12. a gas path interface; 13. a saddle; 14. a fixing member; 141. a buckle switch; 2. a measurement host;
221. an air pump;
21. a signal processing circuit; 210. a processor; 220. a memory; 211. a high flow control module; 212. a low flow control module; 224. a signal amplification processing circuit; 225. an A/D conversion circuit;
22. a gas measurement sensor; 222. an air chamber; 223. an optical measurement component;
3. a high flow attachment; 31. a first bump; 32. a water collecting cup; 321. a first protrusion; 33. a first air pipe;
4. a low flow attachment; 41. a second bump; 42. mounting a cup; 421. a cavity; 422. a second protrusion; 43. a second air pipe; 44. a moisture filter;
7. a gas sampling accessory; 71. and a type marking module.
Detailed Description
In order to more clearly understand the technical features, objects and effects of the present invention, a side-stream end-of-breath gas measurement system is taken as an example, and the detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings.
As shown in fig. 1 to 5, the side-flow end-of-breath gas measurement system comprises a measurement host 2, a gas circuit switching device 1 and a gas sampling accessory 7.
Referring to fig. 1 to 5, the measurement host 2 includes a signal processing circuit 21, a gas measurement sensor 22, and a gas pump 221. The gas measurement sensor 22 is mainly used for measuring gas parameters, and the signal processing circuit 21 is electrically connected to the gas pump 221 and the gas measurement sensor 22, respectively.
In a particular embodiment, the gas measurement sensor 22 includes a gas cell 222 and an optical measurement component 223, the optical measurement component 223 being used to measure the gas within the gas cell 222, such as to measure the concentration of the gas. The gas concentration is generally measured by a Non-Dispersive Infrared spectroscopy (NDIR) technique, which uses the absorption characteristic of the gas to be measured for Infrared light in a certain wavelength band, and selects the Infrared light in the certain wavelength band to irradiate the gas sample in the gas chamber 222, and the optical measurement unit 223 generally includes a light emitting portion and a light receiving portion, which are respectively disposed on two opposite sides of the gas chamber 222. The light receiving section converts the received optical signal into an electric signal and outputs the electric signal to the signal processing circuit 21. Because the relation between the light intensity attenuation of the optical measurement component 223 and the concentration of the measured gas in the gas chamber 222 conforms to the Beer-Lambert law, the signal processing circuit 21 can calculate the concentration of the corresponding gas by testing the light attenuation.
The signal processing circuit 21 includes a processor 210, a memory 220, a signal amplification processing circuit 224 and an a/D conversion circuit 225, wherein an input terminal of the signal amplification processing circuit 224 is connected to an output of the optical measurement component 223, an output terminal of the signal amplification processing circuit 224 is connected to an input of the a/D conversion circuit 225, and an output of the a/D conversion circuit 225 is connected to the processor 210. The processor 210 is further connected to the memory 220 and the air pump 221 respectively, and is configured to load the corresponding measurement module from the memory 220, to control the side-stream breath end gas measurement system to operate in the corresponding measurement mode, and to send corresponding control information to the air pump 221, to control the air pumping rate of the air pump 221. In this embodiment, the measurement modules may include a high flow control module 211 and a low flow control module 212. The processor 210 is also used to calculate gas parameters from the electrical signals output by the optical measurement component 223.
The air pump 221 is disposed on the air path connecting the second end of the air path interface 12 with the air chamber 222, so as to control the sampling flow rate of the air. It should be noted that the configuration of the airway between the second end of airway interface 12 and gas chamber 222 is optimized so that the same measurement performance can be obtained when the side-stream end-of-breath gas concentration measurement system is used with different gas sampling attachments 7. In general, the optimized gas path structure reduces invalid dead space in the host as much as possible and ensures that the response speed is as fast as possible. It is understood that the choice of the air pump 221 has various features, and the air pump 221 in this embodiment preferably uses an air pump 221 with a small volume and a high air pumping rate, and it is understood that other commonly used air pumps 221 are also within the scope of the present invention.
Referring to fig. 1 to 5, the air path switching device 1 includes an air path interface 12 and an identification module 11, wherein a first end of the air path interface 12 is used for connecting with the gas sampling accessory 7, and a second end thereof is connected to the air chamber 222 of the gas measurement sensor 22. The identification module 11 is used for identifying the type of the gas sampling accessory 7 connected with the gas path interface 12 and outputting identification information, and the identification module 11 is electrically connected with the signal processing circuit 21 so as to transmit the identification information to the processor 210 of the signal processing circuit 21.
Referring again to fig. 1-5, gas sampling attachment 7 may include a high flow attachment 3 and a low flow attachment 4. The high-flow accessory 3 comprises a first air pipe 33, a water collecting cup 32 and a first type marking module, wherein the first type marking module is matched with the identification mode of the identification module 11, the first air pipe 33 is communicated with the gas measuring sensor 22 through the air passage interface 12, and the water collecting cup 32 is arranged on the first air pipe 33 to collect moisture in gas passing through the first air pipe 33.
The low flow rate attachment 4 includes a second air tube 43, a moisture filter 44 and a second type marking module, the second type marking module is matched with the identification mode of the identification module 11, the second air tube 43 is communicated with the gas measuring sensor 22 through the air passage interface 12, and the moisture filter 44 is arranged on the second air tube 43 to collect moisture in the gas passing through the second air tube 43.
When the gas path switching device 1 is in butt joint with the gas sampling accessory 7, the identification module 11 is located on one side of the gas path switching device 1, which is in contact with the gas sampling accessory 7 when the gas sampling accessory 7 is connected, when the gas path switching device 1 is in butt joint with the gas sampling accessory 7, the type marking module 71 transmits the type information of the gas sampling accessory 7 to the identification module 11, and the type marking module 71 can comprise the first type marking module and the second type marking module.
Specifically, the identification module 11 may include a plurality of contact switches, which are triggered when the gas circuit switching device 1 is connected to the gas sampling accessory 7, and identify whether the gas sampling accessory 7 connected to the gas circuit interface 12 is the high-flow accessory 3 or the low-flow accessory 4 according to different trigger positions or signal combinations of the plurality of contact switches.
Generally, the air path switching device 1 is disposed on the housing of the measuring mainframe 2, and the air path switching device 1 may be mounted on the front panel of the measuring mainframe 2, and it is understood that other mounting positions of the air path switching device 1 on the measuring mainframe 2 are also within the scope of the present invention. As shown in fig. 4, the housing may be provided with three recesses 111 arranged in an inverted triangle. It is understood that the number and arrangement of the concave holes 111 are various and are within the protection scope of the present invention. A contact switch is correspondingly disposed inside each recess 111. The first type marking module comprises two first bumps 31 arranged on one side of the high-flow accessory 3, which is in contact with the air path switching device 1, and each first bump 31 is correspondingly inserted into one concave hole 111 as shown in the left drawing in fig. 5. The second type marking module comprises two second bumps 41 arranged on one side of the low-flow accessory 4 contacting with the air path switching device 1, and as shown in the right drawing in fig. 5, each second bump 41 is correspondingly inserted into one concave hole 111. The first salient point 31 and the second salient point 41 can transmit different information through corresponding different concave holes 111, for example, contact switches at different positions are triggered by the first salient point 31 and the second salient point 41 respectively, or contact switches in different combinations are triggered by the first salient point 31 and the second salient point 41 respectively to form different signal combinations, for example, when the first contact switch and the second contact switch are triggered, the air path switching device 1 is considered to be connected with the high-flow accessory 3, and when the first contact switch and the third contact switch are triggered, the air path switching device 1 is considered to be connected with the low-flow accessory 4.
Identification module 11 transmits the type information of gas sampling accessory 7 to processor 210, and processor 210 reads the corresponding measurement module from memory 220 based on the type information. When the gas path switching device 1 is connected with the high-flow accessory 3, the identification module 11 transmits the type information of the high-flow accessory 3 to the processor 210, the processor 210 reads the high-flow control module 211 from the memory 220, and at the moment, the processor 210 controls the air pump 221 to work at a high air suction rate, so that the measuring system is controlled to work in a high-flow measurement mode; when the air path switching device 1 is connected with the low-flow accessory 4, the identification module 11 transmits the type information of the low-flow accessory 4 to the processor 210, the processor 210 reads the low-flow control module 212 from the memory 220, and the processor 210 controls the air pump 221 to operate at a low air suction rate at the time, so that the measuring system is controlled to operate in the low-flow measurement mode. Compared with the prior art, the embodiment can automatically identify whether the user accesses the high-flow accessory or the low-flow accessory, can adapt to different application scenes, and does not need the user to perform complex operation.
In addition, the first bump 31 and the second bump 41 can play a role of facilitating the installation of the high flow accessory 3 and the low flow accessory 4 besides transmitting the type information of the gas sampling accessory by being inserted into the corresponding concave holes 111.
In other embodiments, the identification module 11 may be a connector in addition to the contact switch of the identification module 11. The connector is positioned on one side of the gas path switching device 1, which is contacted with the gas sampling accessory 7 when the gas sampling accessory 7 is connected, and correspondingly, the type marking module is a connector plug; the connector is triggered when the gas circuit switching device 1 is connected with the gas sampling accessory 7, and the type of the gas sampling accessory 7 connected with the gas circuit interface 12 is identified through different trigger positions or signal combinations.
In some embodiments, the identification module 11 may also be at least one of an RFID identification module 11, a barcode scanner, a flow identification module, and an optical-electrical identification module 11, and correspondingly, the type marking module is an electronic tag, a barcode, a flow sensor, or an optical transmission module. The flow sensor can automatically record the flow velocity of the gas in the gas sampling accessory 7, and when the flow sensor is in butt joint with the flow identification module, the flow identification module can directly judge the type of the gas sampling accessory 7 and report the type to the processor 210. The light emitting module emits light with a specific spectrum, and when the light emitting module is in butt joint with the photoelectric identification module, the photoelectric identification module converts the received optical signal into an electric signal and reports the electric signal to the processor 210 so as to judge the type of the gas sampling accessory 7.
In some embodiments, the low flow attachment 4 may further include a mounting cup 42 conforming to the shape and size of the water collection cup 32, the mounting cup 42 being adapted to be connected to the end of the second air tube 43 connected to the air passage interface 12. The mounting cup 42 is used for reducing the mounting difference between the high-flow accessory 3 and the low-flow accessory 4, so that the gas path switching device 1 is better in adaptability, and when the gas path switching device 1 is compatible with the high-flow accessory 3 and the low-flow accessory 4, the structural design of the gas path switching device 1 for mounting the high-flow accessory 3 and the low-flow accessory 4 can be kept consistent.
Further, in order to expand the function of the mounting cup 42, a cavity 421 extending in the flowing direction of the gas and having openings at both ends is further provided in the mounting cup 42, so that the moisture filter 44 is detachably mounted in the cavity 421. Typically, moisture filter 44 may snap into cavity 421. The cavity 421 of the mounting cup 42 provides some support to allow for some weight gain of the moisture filter 44 after absorbing water, which provides greater stability of the low flow attachment 4 during use.
In some embodiments, the structure for installing the high flow rate accessory 3 and the low flow rate accessory 4 of the air path switching device 1 may include a pallet 13 for supporting the water collecting cup 32 and the installation cup 42, and a fixing member 14 for fixing the water collecting cup 32 and the installation cup 42 is further disposed above the pallet 13. The support table 13 and the fixing piece 14 form a pair of clamping pieces, when the high-flow accessory 3 and the low-flow accessory 4 are respectively butted with the air passage switching device 1, the support table 13 and the fixing piece 14 can firmly clamp the water collecting cup 32 and the mounting cup 42, and the stability after butt joint and mounting is ensured.
Further, the top end of the fixing member 14 may be provided with a push type snap switch 141, the top of the water collecting cup 32 is provided with a first protrusion 321 matched with the snap switch 141, and the top of the mounting cup 42 is provided with a second protrusion 422 matched with the snap switch 141.
In other embodiments, the gas sampling accessory may also be a mainstream sensor or other respiratory mechanics sensor.
In addition, the gas sampling accessory can be integrated with the measuring host and the gas path switching device into a set of measuring system for sale, and can also be independently existed as an accessory for sale independently.
The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. Variations of the above-described embodiments may be made by those skilled in the art, consistent with the principles of the invention.
Claims (8)
1. The system for measuring the end-tidal gas is characterized by comprising a measuring host (2), a gas path switching device (1) and a gas sampling accessory (7);
the measurement host (2) comprises a signal processing circuit (21), an air pump (221) and a gas measurement sensor (22) for measuring gas parameters, wherein the signal processing circuit (21) is electrically connected with the air pump (221) and the gas measurement sensor (22) respectively; the measuring mainframe (2) further comprises a housing;
the gas path switching device (1) comprises a gas path interface (12) and an identification module (11), wherein the first end of the gas path interface (12) is used for being connected with a gas sampling accessory (7), and the second end of the gas path interface is connected to the gas measurement sensor (22);
the identification module (11) is used for identifying the type of the gas sampling accessory (7) connected with the gas circuit interface (12) and outputting identification information, and the identification module (11) is electrically connected with the signal processing circuit (21) so as to transmit the identification information to the signal processing circuit (21); the identification module (11) comprises a plurality of concave holes (111) arranged on the shell of the measuring host, and the inner side of each concave hole (111) is correspondingly provided with a contact switch;
the gas sampling accessory (7) comprises a high-flow accessory (3) and a low-flow accessory (4), the high-flow accessory (3) comprises a first type marking module, the first type marking module comprises first salient points (31) arranged on one side, in contact with the gas path switching device, of the high-flow accessory, the arrangement positions and the number of the first salient points (31) correspond to the type of the high-flow accessory (3), and the high-flow accessory (3) triggers the contact switches in the concave holes (111) to form identification information corresponding to the high-flow accessory (3) when inserting each first salient point (31) into one concave hole (111) correspondingly, and simultaneously installs the high-flow accessory (3) to the gas path switching device (1); low flow annex (4) include second type mark module, second type mark module is including setting up second bump (41) in one side of low flow annex and gas circuit switching device contact, the position and the quantity that set up of second bump (41) are corresponding with the type of low flow annex (4), low flow annex (4) trigger in shrinkage pool (111) when inserting shrinkage pool (111) that every second bump (41) correspond in contact switch is in order to form the identification information who corresponds with low flow annex (4), and install low flow annex (4) simultaneously gas circuit switching device (1).
2. The end-tidal gas measurement system of claim 1,
the high-flow accessory (3) further comprises a first air pipe (33) and a water collecting cup (32), the first air pipe (33) is communicated with the gas measuring sensor (22) through the air passage interface (12), and the water collecting cup (32) is arranged on the first air pipe (33) to collect moisture in gas passing through the first air pipe (33);
the low-flow attachment (4) further comprises a second air pipe (43) and a moisture filter (44), wherein the second air pipe (43) is communicated with the gas measuring sensor (22) through the air passage interface (12), and the moisture filter (44) is arranged on the second air pipe (43) to collect moisture in the gas passing through the second air pipe (43).
3. The end-of-breath gas measurement system according to claim 2, wherein the gas path switching device (1) further comprises a pallet (13) for supporting the water collecting cup (32), and a fixing member (14) for fixing the water collecting cup (32) is further arranged above the pallet (13);
the top end of the fixing piece (14) is provided with a press type buckle switch (141), and the top of the water collecting cup (32) is provided with a first bulge (321) matched with the buckle switch (141).
4. The end-of-breath gas measurement system of claim 3, wherein the low-flow attachment (4) further comprises a mounting cup (42) having a shape and a size corresponding to those of the water collecting cup (32), the mounting cup (42) is provided with a cavity (421) extending along the flow direction of the gas and having openings at two ends, one end of the moisture filter (44) is detachably connected to the second gas pipe (43), and the other end of the moisture filter is detachably mounted in the cavity (421) and connected to the gas path interface (12) through the cavity (421).
5. An end-of-breath gas measurement system according to claim 4, wherein the top of the mounting cup (42) is provided with a second protrusion (422) that mates with the snap switch (141).
6. The end-of-breath gas measurement system of claim 1, wherein the signal processing circuitry (21) comprises a processor (210) and a memory (220), the identification module (11) is electrically connected to the processor (210), and the processor (210) loads the corresponding measurement module from the memory (220) according to the identification information to control the operation of the side-stream end-of-breath gas measurement system in the corresponding measurement mode and sends corresponding control information to the gas pump (221) to control the pumping rate of the gas pump (221).
7. The end-tidal gas measurement system of claim 6, wherein the measurement module comprises a high flow control module (211) and a low flow control module (212).
8. An end-tidal gas measurement system according to claim 1, wherein the gas measurement sensor (22) comprises a gas chamber (222) and an optical measurement component (223); the second end of the air passage interface (12) is connected into the air chamber (222), and the optical measurement component (223) is used for measuring the air in the air chamber (222).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2015/092134 WO2017063200A1 (en) | 2015-10-16 | 2015-10-16 | Expiratory end gas measurement system and gas sampling accessories |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107847706A CN107847706A (en) | 2018-03-27 |
| CN107847706B true CN107847706B (en) | 2021-08-24 |
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| CN201580081807.5A Active CN107847706B (en) | 2015-10-16 | 2015-10-16 | End-of-breath gas measurement system and gas sampling accessory |
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| Country | Link |
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| CN (1) | CN107847706B (en) |
| WO (1) | WO2017063200A1 (en) |
Families Citing this family (2)
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| CN112378595B (en) * | 2020-10-29 | 2023-07-28 | 深圳市美的连医疗电子股份有限公司 | Gas sampling tube connection state detection method and gas detection device |
| CN112704792A (en) * | 2020-12-30 | 2021-04-27 | 西南医科大学 | Water collecting cup assembly and breathing machine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6896713B1 (en) * | 1999-02-02 | 2005-05-24 | Artema Medical Ab | Liquid separator with holder unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6126610A (en) * | 1997-11-03 | 2000-10-03 | Novametrix Medical Systems, Inc. | Pneumatic connector with encoding |
| EP1584345B1 (en) * | 2004-03-31 | 2010-07-14 | Artema Medical Ab | Arrangement for analysing respiratory gases |
| WO2006092001A1 (en) * | 2005-03-01 | 2006-09-08 | Resmed Limited | Recognition system for an apparatus that delivers breathable gas to a patient |
| US20060278229A1 (en) * | 2005-06-08 | 2006-12-14 | Imi Norgren, Inc. | System and method to prevent the improper installation of the inlet fittings in a ventilator system |
| US7435225B2 (en) * | 2006-11-22 | 2008-10-14 | General Electric Company | Method and arrangement for measuring breath gases of a patient |
| CN104582776B (en) * | 2012-08-15 | 2017-03-08 | 皇家飞利浦有限公司 | There is the sidestream respiratory gas sampler of flexible accessory and removable dehydrator |
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2015
- 2015-10-16 CN CN201580081807.5A patent/CN107847706B/en active Active
- 2015-10-16 WO PCT/CN2015/092134 patent/WO2017063200A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6896713B1 (en) * | 1999-02-02 | 2005-05-24 | Artema Medical Ab | Liquid separator with holder unit |
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| WO2017063200A1 (en) | 2017-04-20 |
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