CN114272486B - Breathing machine humidification system and control method thereof - Google Patents
Breathing machine humidification system and control method thereof Download PDFInfo
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- CN114272486B CN114272486B CN202111586166.2A CN202111586166A CN114272486B CN 114272486 B CN114272486 B CN 114272486B CN 202111586166 A CN202111586166 A CN 202111586166A CN 114272486 B CN114272486 B CN 114272486B
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- 230000029058 respiratory gaseous exchange Effects 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 179
- 238000007789 sealing Methods 0.000 claims abstract description 22
- 238000012544 monitoring process Methods 0.000 claims description 11
- 230000000241 respiratory effect Effects 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 230000005236 sound signal Effects 0.000 claims description 6
- 239000013589 supplement Substances 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 12
- 239000007788 liquid Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000741 silica gel Substances 0.000 description 3
- 229910002027 silica gel Inorganic materials 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000003860 sleep quality Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Abstract
The invention relates to a breathing machine humidification system and a control method thereof, wherein the breathing machine humidification system comprises: the breathing machine actively configures and outputs compressed airflow; the humidifier unit is provided with a sterile sealed water tank and a micropore leakage pipe which is connected with the output end of the sealed water tank in a sealing way; the breathing tube is used for directionally conveying the humidified airflow, at least part of the micropore leakage tube is arranged in the breathing tube, and the humidifier unit, the breathing machine and the breathing tube are connected through the sealing joint; the breathing mask receives the humidifying airflow, is communicated with the output end of the breathing tube, and is humidified uniformly, so that the humidifying degree of the airflow in the pipeline can be accurately controlled, and the humidifying efficiency is effectively improved.
Description
Technical Field
The invention relates to the technical field of respirators, in particular to a breathing machine humidification system and a control method thereof.
Background
With the development of medical technology, home ventilators have become the most effective devices for increasing lung ventilation and improving sleep quality. The breathing machine generally comprises a host machine and a humidifier, wherein the host machine is used for generating fresh air with continuous positive pressure, the humidifier is used for increasing the humidity of the positive pressure air generated by the host machine, so that the air entering the respiratory tract is more moist, and in addition, the humidity of the humidifier is controlled to be more comfortable for a patient in the using process of the breathing machine, so that the using compliance of the breathing machine is improved.
All ventilators in the market at present are humidified by heating humidified water to increase the evaporation of water so as to control the humidification degree. The medical breathing machine adopts a special heating humidifier, the breathing machine and the humidifier are two separated units, the whole machine structure is complex, and the humidifying degree cannot be accurately controlled. Because of the limitation of the use environment and the operation requirement, the household breathing machine directly combines the humidifying water tank with the breathing host. The high-speed compressed air flow output by the breathing machine passes through the surface of the humidified water of the water tank to carry away water vapor so as to increase the humidity. Due to the limitation of the whole structure, the drop between the highest water level in the humidifying water tank and the water level of the turbine fan of the breathing machine is very small, namely, the difference is 10-20mm, the humidifying water is very easy to flow backwards into the breathing machine in the tilting and shaking process, and the fan and an internal control circuit are damaged. Patent application number: "CN201711211742.9" discloses "a breathing machine humidification jar emptys leak protection method and device", it utilizes the flotation device to guarantee that humidification jar air current input, delivery outlet float on the liquid surface all the time to ensure that the interior liquid of humidification jar can not flow out of humidification jar under arbitrary inclination, can cause the circulation condition of humidification water when solving to prevent flowing backward, its humidification effect is poor, control humidification ability is not enough, the humidification effect (humidification degree) of current medical and domestic breathing machine mainly relies on the humidification water heating of giving to increase the evaporation of water content and reaches, holistic humidification inefficiency, humidification inhomogeneous, unable quantitative control pipeline interior air current humidification degree.
Disclosure of Invention
In order to solve the problems in the background technology, the invention provides a breathing machine humidification system and a control method, which are used for solving the technical problems that humidification water of a humidifier of a breathing machine is easy to flow backward, humidification effect is poor and humidification is uneven.
The invention provides the following technical scheme:
in a first aspect, the present invention provides a ventilator humidification system comprising:
the breathing machine actively configures and outputs compressed airflow;
the humidifier unit is provided with a sterile sealed water tank and a micropore leakage pipe which is connected with the output end of the sealed water tank in a sealing way;
a breathing tube for directional delivery of humidified airflow, wherein at least part of the microporous leakage tube is arranged in the breathing tube, and the humidifier unit, the breathing machine and the breathing tube are connected through a sealing joint; further, the length of the microporous leakage pipe positioned in the breathing pipe is not less than 70% of the whole length of the microporous leakage pipe.
A respiratory mask receives a humidified airflow in communication with the breathing tube output.
Preferably, the humidifier unit comprises:
the water storage tank is arranged in the shell, and the inner cavity of the water storage tank is provided with humidifying water;
the pump body is used for guiding the humidified water in the water storage tank into the sealed water tank, the output end of the water storage tank is connected with a drainage tube, the input end of the sealed water tank is connected with a water injection pipe, and the drainage tube and the water injection pipe are respectively and hermetically connected with the pump body;
the pressure sensor is arranged in the sealed water tank to monitor the water pressure in the sealed water tank in real time;
the first water level sensor and the second water level sensor are arranged in the inner cavity of the water storage tank and are used for monitoring the water level state of the water storage tank in real time;
and the control module is used for responding to the feedback signals of the pressure sensor, controlling the operation parameters of the pump body and receiving the feedback signals of the first water level sensor and the second water level sensor.
Preferably, the humidifier unit further comprises:
the display module is used for responding to the control signal of the control module and outputting a light source signal or pattern;
the output end of the key module is connected with an input pin of the control module so as to configure the operation mode of the humidifier unit;
the alarm module responds to the control signal of the control module and outputs an audio signal;
and the power supply module is used for supplying electric energy for the operation of the humidifier unit and is provided with an alternating current voltage detection circuit.
Preferably, the pump body is provided with a complete machine power supply circuit and an overload monitoring protection circuit.
Preferably, the sealing joint is a three-way joint, and the three-way joint is provided with two input ports respectively connected with the breathing machine and the sealing water tank correspondingly and one output port connected with the breathing pipe.
Preferably, the micro-pore leakage pipe wall in the breathing pipe cavity is uniformly distributed with leakage holes.
Preferably, the humidifier unit is communicatively connected to the ventilator, and the humidifier unit is configured with a communication interface.
In a second aspect, the present invention provides a method for controlling a ventilator humidification system, comprising the steps of:
the humidifier unit, the breathing machine and the breathing pipe are connected in a sealing way through a three-way joint;
the method comprises the steps that humidifying water is supplied through a humidifier unit, the pressure sensor in the sealed water tank is used for monitoring the water pressure in the sealed water tank in real time, when the pressure parameter is lower than a set value, the control module controls the pump body to supplement the humidifying water from the inner cavity of the water storage tank to the inner cavity of the sealed water tank, so that the humidifying water is extruded to the outer side wall surface of the microporous leakage pipe by the water pressure, and at least part of the microporous leakage pipe is arranged in the breathing pipe;
the breathing machine is used for supplying and actively configuring compressed air flow, and the compressed air flow is utilized to take away humidifying water in the breathing pipe and positioned on the outer side wall surface of the microporous leakage pipe, so that humidifying air flow is formed;
the respiratory mask receives the humidified airflow.
Preferably, the inner cavity of the water storage tank is provided with a first water level sensor and a second water level sensor so as to monitor the water level state of the water storage tank in real time.
Preferably, the humidifier unit comprises:
the display module is used for responding to the control signal of the control module and outputting a light source signal or pattern, and the display module can display the running mode of the humidifier unit, the water pressure parameter in the sealed water tank and the water level state parameter of the water storage tank;
the output end of the key module is connected with one input pin of the control module so as to configure the operation mode of the humidifier unit;
the alarm module responds to the control signal of the control module and outputs an audio signal;
and a power module for supplying electric energy for the operation of the humidifier unit.
The beneficial effects of the invention are as follows:
the humidifying water is supplied by the humidifier unit, the water pressure is utilized to distribute the humidifying water to the outer side wall surface of the micropore leakage pipe, the breathing machine is actively configured to output compressed air flow, the compressed air flow is utilized to take away the humidifying water positioned on the outer side wall surface of the micropore leakage pipe in the breathing pipe, form the humidifying air current, this humidifying air current of rethread respirator receipt is carried to human respiratory air flue, and its humidifying is even, the humidifying degree of accurate control breathing pipeline internal air current can effectively improve the efficiency of humidifying.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention.
FIG. 1 is a schematic diagram of a humidifier unit according to the present invention;
FIG. 2 is a schematic illustration of the structural connection of a three-way fitting and a breathing tube provided by the present invention;
FIG. 3 is a schematic diagram of the operation of the present invention;
FIG. 4 is a circuit diagram of a control module provided by the present invention;
FIG. 5 is a circuit diagram of pump body drive control provided by the invention;
FIG. 6 is a circuit diagram of a connection of a pressure sensor provided by the present invention;
FIG. 7 is a circuit diagram of a first water level sensor and a second water level sensor according to the present invention;
FIG. 8 is a circuit diagram of a display module according to the present invention;
FIG. 9 is a circuit diagram of an alarm module provided by the present invention;
FIG. 10 is a circuit diagram of a communication interface provided by the present invention;
FIG. 11 is a circuit diagram of the power supply circuit of the whole machine provided by the invention;
fig. 12 is a circuit diagram of an overload monitoring protection circuit provided by the present invention;
fig. 13 is a circuit diagram of an ac voltage detection circuit according to the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example 1:
the present invention provides a humidification system for a ventilator 11, please refer to fig. 1-13; the ventilator 11 humidification system comprises:
a ventilator 11 actively configured to output a compressed air flow;
a humidifier unit provided with a sterile sealed water tank 7 and a microporous leakage pipe 8 hermetically connected to the output end of the sealed water tank 7;
a breathing tube 12 for directional delivery of humidified air flow, wherein at least part of the end of the microporous leakage tube 8 is arranged in the breathing tube 12, and the humidifier unit, the breathing machine 11 and the breathing tube 12 are connected through a sealing joint; further, the length of the micropore leakage pipe 8 positioned in the breathing tube 12 is not less than 70% of the whole length of the micropore leakage pipe 8, so as to ensure that a humidifying space for the contact of humidifying water and compressed air flow is fully formed in the inner cavity of the breathing tube 12.
A respiratory mask 16 receives a humidified flow of gas which communicates with the output of the breathing tube 12.
In particular, the humidifier unit thereof comprises:
the device comprises a shell 1, wherein a water storage tank 4 is arranged in the shell 1, and humidifying water is arranged in an inner cavity of the water storage tank 4;
the pump body 3 is used for guiding the humidified water in the water storage tank 4 into the sealed water tank 7, the output end of the water storage tank 4 is connected with the drainage tube 5, the input end of the sealed water tank 7 is connected with the water injection tube 6, and the drainage tube 5 and the water injection tube 6 are respectively and hermetically connected with the pump body 3;
a pressure sensor 15 arranged in the sealed water tank 7 for monitoring the water pressure in the sealed water tank 7 at a fixed point;
the first water level sensor 13 and the second water level sensor 14 are arranged in the inner cavity of the water storage tank 4 and are used for monitoring the water level state of the water storage tank 4 in real time;
the control module 2 responds to the feedback signal of the pressure sensor 15 to control the operation parameters of the pump body 3 and receives the feedback signals of the first water level sensor 13 and the second water level sensor 14.
In this embodiment, the humidifier unit is communicatively connected to the ventilator 11, and the humidifier unit is configured with a communication interface.
Example 2:
in this embodiment, the humidifier unit further comprises:
a display module for outputting a light source signal or pattern in response to a control signal of the control module 2;
the output end of the key module is connected with an input pin of the control module 2 so as to configure the operation mode of the humidifier unit;
an alarm module for outputting an audio signal in response to a control signal from the control module 2;
and the power supply module is used for supplying electric energy for the operation of the humidifier unit and is provided with an alternating current voltage detection circuit.
In this embodiment, the pump body 3 is configured with a complete machine power supply circuit and an overload monitoring protection circuit.
In this embodiment, the sealing joint is a three-way joint 10, the three-way joint 10 is provided with two input ports which are respectively and correspondingly connected with the breathing machine 11 and the sealing water tank 7, and a joint output port 10C which is connected with the breathing pipe 12, the two input ports comprise a first input port 10A and a second input port 10B, the first input port 10A is connected with the output end of the sealing water tank 7, the second input port 10B is connected with the output end of the breathing machine 11, the three-way joint 10 is configured and clamped with a sealing silica gel plug 9, one end part of the sealing silica gel plug 9 is tightly and hermetically connected with the first input port 10A, and the other end of the sealing silica gel plug 9 is hermetically connected with the output end of the sealing water tank 7.
In this embodiment, the wall of the microporous leakage pipe 8 in the inner cavity of the breathing pipe 12 is uniformly distributed with leakage holes, the microporous leakage pipe 8 can be a soft tubular elastomer made of hollow rubber and reinforced modified plastic, and the outer wall of the microporous leakage pipe is fully distributed with micropores to leak humidifying water.
Example 3:
the invention provides a control method of a humidification system of a ventilator 11, which comprises the following steps:
the humidifier unit, the breathing machine 11 and the breathing tube 12 are connected in a sealing way through a three-way joint 10;
the humidifying water is supplied through the humidifier unit, the pressure sensor 15 in the sealed water tank 7 is utilized to monitor the water pressure in the sealed water tank 7 at fixed points, when the pressure parameter is lower than the set value, the control module 2 controls the pump body 3 to supplement the humidifying water from the inner cavity of the water storage tank 4 to the inner cavity of the sealed water tank 7, so that the humidifying water is distributed to the outer side wall surface of the microporous leakage pipe 8 by utilizing the water pressure, and at least part of the microporous leakage pipe 8 is arranged in the breathing pipe 12;
the breathing machine 11 is used for supplying and actively configuring the output compressed air flow, and the compressed air flow is used for taking away the humidifying water in the breathing pipe 12, which is positioned on the outer side wall surface of the microporous leakage pipe 8, so as to form humidifying air flow;
the respiratory mask 16 receives the humidified flow of gas.
The three-way joint 10 is a key node for connecting the ventilator 11 to output compressed air flow, the breathing tube 12 and the microporous leakage pipe 8, so that the compressed air flow and the humidified moisture acted by the humidifier unit are mixed in the breathing tube 12, and the high-pressure air flow carrying sufficient humidification is conveyed into the respiratory airways of a human body through the breathing mask 16.
In this embodiment, the inner cavity of the water storage tank 4 is provided with a first water level sensor 13 and a second water level sensor 14 to monitor the water level state of the water storage tank 4 in real time.
In this embodiment, the humidifier unit includes:
the display module is used for responding to the control signal of the control module 2 and outputting a light source signal or pattern, and the display module can display the running mode of the humidifier unit, the water pressure parameter in the sealed water tank 7 and the water level state parameter of the water storage tank 4;
the output end of the key module is connected with an input pin of the control module 2 so as to configure the operation mode of the humidifier unit;
and the alarm module is used for responding to the control signal of the control module 2 and outputting an audio signal.
Example 4:
the core of the control module 2 is that a U11 (STC 12C5A 8052) CPU is adopted, the sampling signal and the control drive of an inner sensor of a humidifier unit are controlled by the CPU, a pump body 3 is a liquid booster pump, the U12 (L2930D) is adopted for driving and controlling, and control ends MOTOR A, MOTOR B, MOTOR C and MOTOR D are connected to 18, 19, 20 and 21 ports of the U11 and output quantitative humidification water under the accurate control of the control module 2;
the pressure sensor 15, namely U6, can collect the water pressure in the sealed water tank 7, send the pressure signal to 1 foot of the control module 2 through its P_YL end, control the pump body 3 to output the humidifying water accurately according to the pressure signal; the first water level sensor 13 is arranged at the low position of the water storage tank 4, the second water level sensor 14 is arranged at the high position of the water storage tank 4, when the first water level sensor 13 detects that the water level is lower than the limit value, the SIGNAL2 end feeds back to the 11 feet of the control module 2 to inform that water needs to be added, and an alarm prompt is sent out through an alarm circuit; when water is added to the water storage tank 4, when the water level detected by the first water level sensor 13 exceeds the limit value, the SIGNAL1 end feeds back to the 10 feet of the control module 2 to inform that water addition is stopped, and an audio alarm prompt is sent out through the alarm module;
the communication interface is connected with the host of the breathing machine 11, the working state of the humidifier unit is communicated to the host of the breathing machine 11, so that proper airflow humidification is timely given to the breathing tube 12 when the breathing machine 11 works, and humidification water supply is timely stopped (liquid hanging phenomenon in the breathing tube 12 is prevented) when the breathing machine 11 stops working (no high-pressure airflow output);
in order to prevent the motor of the pump body 3 from being damaged due to overcurrent when the pump body is in fault, the overload monitoring protection circuit is used for detecting the change of the current of the whole machine at any time, the P_GL end is connected with the 24 pins of the control module 2, when abnormal current occurs, the alarm is given out in time, and the power supply to the pump body 3 is stopped according to a preset event judging program;
the humidifier unit is also provided with display information and operation control of the working state of the humidifier, so that the set humidification water pressure (the seepage quantity of the microporous seepage hose is maintained, the seepage quantity is larger as the pressure is higher, the humidification degree is adjusted by changing the pressure setting), the current actual humidification water pressure is displayed, the amount of humidification water in the water storage tank 4 is displayed, and the pressure in the sealing water tank 7 can be set and adjusted.
While the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes and modifications may be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.
Claims (7)
1. A ventilator humidification system, comprising:
the breathing machine actively configures and outputs compressed airflow;
the humidifier unit is provided with a sterile sealed water tank and a micropore leakage pipe which is connected with the output end of the sealed water tank in a sealing way;
a breathing tube for directional delivery of humidified airflow, wherein at least part of the microporous leakage tube is arranged in the breathing tube, and the humidifier unit, the breathing machine and the breathing tube are connected through a sealing joint;
a respiratory mask receiving a humidified gas flow in communication with the respiratory tube output;
the humidifier unit comprises:
the water storage tank is arranged in the shell, and the inner cavity of the water storage tank is provided with humidifying water;
the pump body is used for guiding the humidified water in the water storage tank into the sealed water tank, the output end of the water storage tank is connected with a drainage tube, the input end of the sealed water tank is connected with a water injection pipe, and the drainage tube and the water injection pipe are respectively and hermetically connected with the pump body;
the pressure sensor is arranged in the sealed water tank to monitor the water pressure in the sealed water tank in real time;
the first water level sensor and the second water level sensor are arranged in the inner cavity of the water storage tank and are used for monitoring the water level state of the water storage tank in real time;
the control module is used for responding to the feedback signals of the pressure sensors, controlling the operation parameters of the pump body and receiving the feedback signals of the first water level sensor and the second water level sensor; when the pressure parameter of the pressure sensor is lower than a set value, the control module controls the pump body to supplement humidifying water from the inner cavity of the water storage tank to the inner cavity of the sealed water tank so as to squeeze the humidifying water to the outer side wall surface of the microporous leakage pipe by utilizing water pressure; the pump body is provided with a complete machine power supply circuit and an overload monitoring protection circuit;
leakage holes are uniformly distributed on the wall of the microporous leakage pipe positioned in the inner cavity of the breathing pipe.
2. A ventilator humidification system as claimed in claim 1, wherein: the humidifier unit further comprises:
the display module is used for responding to the control signal of the control module and outputting a light source signal or pattern;
the output end of the key module is connected with an input pin of the control module so as to configure the operation mode of the humidifier unit; the alarm module responds to the control signal of the control module and outputs an audio signal;
and a power module for supplying electric energy for the operation of the humidifier unit.
3. A ventilator humidification system as claimed in claim 1, wherein: the sealing joint is a three-way joint, and the three-way joint is provided with two input ports which are respectively and correspondingly connected with the breathing machine, the sealing water tank and an output port which is connected with the breathing pipe.
4. A ventilator humidification system as claimed in any one of claims 1-3, wherein: the humidifier unit is in communication connection with the breathing machine, and is provided with a communication interface.
5. A control method of a breathing machine humidification system is characterized in that: the method comprises the following steps:
the humidifier unit, the breathing machine and the breathing pipe are connected in a sealing way through a three-way joint;
the method comprises the steps that humidifying water is supplied through a humidifier unit, the pressure sensor in the sealed water tank is used for monitoring the water pressure in the sealed water tank at fixed points, when the pressure parameter is lower than a set value, a control module controls a pump body to supplement the humidifying water from the inner cavity of a water storage tank to the inner cavity of the sealed water tank, so that the humidifying water is extruded to the outer side wall surface of a microporous leakage pipe by the water pressure, and at least part of the microporous leakage pipe is arranged in a breathing pipe;
the breathing machine is used for supplying and actively configuring compressed air flow, and the compressed air flow is utilized to take away humidifying water in the breathing pipe and positioned on the outer side wall surface of the microporous leakage pipe, so that humidifying air flow is formed;
the respiratory mask receives the humidified airflow.
6. The control method according to claim 5, characterized in that: the inner cavity of the water storage tank is provided with a first water level sensor and a second water level sensor so as to monitor the water level state of the water storage tank in real time.
7. The control method according to claim 5, characterized in that: the humidifier unit comprises:
the display module is used for responding to the control signal of the control module and outputting a light source signal or pattern, and can display the running mode of the humidifier unit, the water pressure parameter in the sealed water tank and the water level state parameter of the water storage tank;
the output end of the key module is connected with one input pin of the control module so as to configure the operation mode of the humidifier unit;
the alarm module responds to the control signal of the control module and outputs an audio signal;
and a power module for supplying electric energy for the operation of the humidifier unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111586166.2A CN114272486B (en) | 2021-12-22 | 2021-12-22 | Breathing machine humidification system and control method thereof |
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| CN202111586166.2A CN114272486B (en) | 2021-12-22 | 2021-12-22 | Breathing machine humidification system and control method thereof |
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| CN213077044U (en) * | 2020-07-21 | 2021-04-30 | 昆明医科大学第二附属医院 | Breathing machine device adopting novel humidification mode |
| CN113521480A (en) * | 2020-07-24 | 2021-10-22 | 天津怡和嘉业医疗科技有限公司 | Humidifier and ventilation treatment equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2003258918B2 (en) * | 2002-08-30 | 2005-11-17 | Fisher & Paykel Healthcare Limited | Humidification system |
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|---|---|---|---|---|
| WO2005079898A2 (en) * | 2004-02-20 | 2005-09-01 | Weinmann Geräte für Medizin GmbH & Co. KG | Modular device for humidifying respiratory air |
| CN202459720U (en) * | 2012-02-28 | 2012-10-03 | 谢红英 | Humidifying tracheotomy catheter |
| CN204484980U (en) * | 2015-03-02 | 2015-07-22 | 郑文娇 | A kind of modified model respiratory system |
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