CN210933251U - Pressure control device, anesthesia machine and breathing machine - Google Patents
Pressure control device, anesthesia machine and breathing machine Download PDFInfo
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- CN210933251U CN210933251U CN201921350121.3U CN201921350121U CN210933251U CN 210933251 U CN210933251 U CN 210933251U CN 201921350121 U CN201921350121 U CN 201921350121U CN 210933251 U CN210933251 U CN 210933251U
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Abstract
The utility model discloses a pressure control device, an anesthesia machine and a breathing machine, wherein the pressure control device comprises a control center, an air suction valve connected with an air supply device, an air supply pipeline connected with the air suction valve, an expiratory valve connected with the air supply pipeline and a first flow sensor arranged at the output end of the expiratory valve; one end of the air supply pipeline, which is far away from the air suction valve, forms an air supply end; the inhalation valve, the exhalation valve and the first flow sensor are all in communication connection with the control center; the control center controls the flow rate of the air suction valve according to the flow rate of the air flow detected by the first flow sensor, and the pressure of the air supply pipeline is maintained. The utility model arranges the flow sensor at the output end of the expiratory valve, and controls the flow velocity of the inspiratory valve according to the detected flow information, thereby controlling the overflow flow velocity of the expiratory valve in a proper range and further maintaining the constancy of the inspiratory pressure; the control mode is easy to operate and can achieve good control effect.
Description
Technical Field
The utility model relates to the technical field of medical equipment, especially, relate to a pressure control device, anesthesia machine and breathing machine for anesthesia machine and breathing machine.
Background
Anesthesia machines and ventilators are medical devices that control or assist in the breathing of a patient. The anesthesia machine is mainly used for maintaining the respiration of a patient in an anesthesia state by using a general anesthesia patient in an operating room, delivering mixed gas of oxygen, air and anesthetic gas to the patient and maintaining the patient in an anesthesia operation state; after the operation is finished, the patient is assisted to breathe until the patient is withdrawn after spontaneous breathing is recovered. Ventilators are ICU-assisted breathing apparatuses for patients with no or relatively weak spontaneous breathing capacity.
For an anesthesia machine or a ventilator, there are generally two mechanical ventilation modes, one being a volume mode and the other being a pressure mode. The volume mode is suitable for adults, while the pressure mode is suitable for children or neonates with catheter leaks, as well as patients with non-invasive ventilation. For the pressure mode, from its waveform, the inspiratory flow rate must be a decreasing wave in order to maintain the pressure constant; according to the respiratory mechanics model, P ═ V (volume)/C (compliance) + F (flow rate) × R (airway resistance), pressure is related to both R and C of the respiratory system, and as inspiratory time increases, the flow rate must decrease to maintain inspiratory pressure constant.
It is common practice to monitor the airway pressure P and the set pressure and feed back the inspiratory valve control flow rate in real time, so that the control effect depends on the response speed of the inspiratory valve. A large air volume of a breathing circuit exists between the inspiratory valve and the flow rate of the patient, and large lag exists; and under the environment of the anesthesia machine, the flow rate of fresh gas also has influence, so that the satisfactory effect is difficult to achieve.
Alternatively, R and C are calculated every cycle, and the target flow rate is calculated in real time based on R and C. However, if patients R and C are unstable, satisfactory results are difficult to achieve.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a pressure control device and have this pressure control device's anesthesia machine and breathing machine that improve control effect.
The utility model provides a technical scheme that its technical problem adopted is: providing a pressure control device, which comprises a control center, an inhalation valve connected with a gas supply device, a gas pipeline connected with the inhalation valve, an exhalation valve connected with the gas pipeline, and a first flow sensor arranged at the output end of the exhalation valve;
one end of the air supply pipeline, which is far away from the air suction valve, forms an air supply end; the inhalation valve, the exhalation valve and the first flow sensor are all in communication connection with the control center; the control center controls the flow rate of the air suction valve according to the flow rate of the air flow detected by the first flow sensor, and the pressure of the air supply pipeline is maintained.
Preferably, the pressure control device further comprises a pressure sensor and a second flow sensor provided on the air feed pipe; and the pressure sensor and the second flow sensor are both in communication connection with the control center.
Preferably, the pressure sensor is located between the suction valve and the second flow sensor; the exhalation valve is located between the inhalation valve and the pressure sensor.
The utility model also provides an anesthesia machine, which comprises the pressure control device.
The utility model also provides a breathing machine, including above arbitrary pressure control device.
The utility model has the advantages that: the flow sensor is arranged at the output end of the expiratory valve, and the flow speed of the inspiratory valve is controlled according to the detected flow information, so that the overflow flow speed of the expiratory valve is controlled in a proper range, and the constancy of the inspiratory pressure is further maintained; the control mode is easy to operate and can achieve good control effect.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a schematic connection diagram of a pressure control device according to an embodiment of the present invention.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, the pressure control device according to an embodiment of the present invention includes a control center (not shown), an inhalation valve 10 connected to a gas supply device, a gas supply duct 20 connected to the inhalation valve 10, an exhalation valve 30 connected to the gas supply duct 20, and a first flow sensor 40 disposed at an output end of the exhalation valve 30.
The pressure control device of the utility model is used for anesthesia machines, breathing machines and other equipment. The end of the air supply pipeline 20 far away from the air suction valve 10 forms an air supply end; the inhalation valve 10 is used in connection with a gas supply of an anesthesia machine or a respirator, so that gas is supplied to a patient through the inhalation valve 10 and the gas supply conduit 20. An exhalation valve 30 is also connected to the delivery conduit 20 between the delivery end and the inhalation valve 10 to provide an overflow function. The first flow sensor 40 is disposed at the output end of the exhalation valve 30 and is used for detecting the flow rate of the airflow overflowing from the exhalation valve 30, so as to determine whether the flow rate of the inhalation valve 10 is too large.
When the flow rate of the air flow detected by the first flow sensor 40 exceeds a predetermined flow rate, it indicates that the flow rate of the inhalation valve 10 exceeds a preset flow rate, and the control center decreases the flow rate of the inhalation valve 10. After the flow rate of the inhalation valve 10 is reduced, the overflow of the exhalation valve 30 is correspondingly reduced; by controlling the flow rate of the exhalation valve 10, the overflow of the exhalation valve is controlled to a preset flow rate, which may be 2-5L/min.
When the first flow sensor 40 does not detect the flow rate of the air flow or the detected flow rate of the air flow does not reach the preset flow rate, it indicates that the flow rate of the inhalation valve 10 does not reach the preset flow rate, no air flow is discharged from the exhalation valve 30, and the control center increases the flow rate of the inhalation valve 10. By controlling the flow rate of the exhalation valve 10, the overflow of the exhalation valve is controlled to a preset flow rate, which may be 2-5L/min.
The exhalation valve 30 has a seal pressure that is set by the control center and may be 5-100cmH2O, and the like.
When the pressure control device works, when the airway pressure (namely the pressure of the air supply pipeline 20) is less than the sealing valve pressure of the expiratory valve 30, the expiratory valve 30 is closed (not opened), and the overflow flow rate of the expiratory valve 30 is 0; the entire flow of gas delivered by the inhalation valve 10 reaches the patient. When the airway pressure (namely the pressure of the air supply pipeline 20) is greater than the valve sealing pressure of the expiratory valve 30, the expiratory valve 30 is opened to carry out overflow pressure discharge, and the overflow flow rate is not 0; the flow of gas delivered by the inhalation valve 10 partly reaches the patient and partly overflows through the exhalation valve 30. From the above, the maximum value of the airway pressure is the valve-sealing pressure.
The pressure control device of the present invention further comprises a pressure sensor 50 and a second flow sensor 60 disposed on the air supply pipe 20; both the pressure sensor 50 and the second flow sensor 60 are communicatively coupled to the control center. The second flow sensor 60 is preferably located at the delivery end of the delivery conduit 20 and the pressure sensor 50 may be located anywhere in the delivery conduit 20, for example may be located near the second flow sensor 60 or near the inhalation valve 10, exhalation valve 30, etc.
Specifically, as shown in fig. 1, the pressure sensor 50 is located between the suction valve 10 and the second flow sensor 60; the exhalation valve 30 is located between the inhalation valve 10 and the pressure sensor 50.
The pressure sensor 50 is used to detect the pressure (air pressure) of the air supply conduit 10 and transmit the detected pressure data to the control center, and the detected pressure of the air supply conduit 10 is the airway pressure. The second flow sensor 60 is used for detecting the flow rate of the output airflow at the air delivery end and transmitting the detected flow rate data to the control center, and the flow rate detected by the second flow sensor 60 is the final flow rate input into the patient.
The pressure control method of the pressure control device of the present invention, referring to fig. 1, may include the following steps:
a first flow sensor 40 at the output of the exhalation valve 30 senses the flow rate of the air flow output by the exhalation valve 30 and sends the sensed flow rate data to the control center.
The control center controls the flow rate of the suction valve 10 connected to the air supply duct 20 based on the received air flow rate data, and maintains the pressure of the air supply duct 10.
Wherein, when the flow rate of the air flow detected by the first flow sensor 40 exceeds a predetermined flow rate, it indicates that the flow rate of the inhalation valve 10 exceeds a preset flow rate (e.g. 2-5L/min), and the control center decreases the flow rate of the inhalation valve 10. After the flow rate of the inhalation valve 10 is reduced, the overflow of the exhalation valve 30 is correspondingly reduced; by controlling the flow rate of the exhalation valve 10, the overflow of the exhalation valve is controlled to a preset flow rate, which may be 2-5L/min.
When the first flow sensor 40 does not detect the flow rate of the air flow or the detected flow rate of the air flow does not reach the predetermined flow rate, it indicates that the flow rate of the inhalation valve 10 does not reach the preset flow rate (e.g. 2-5L/min), no air flow is discharged from the exhalation valve 30, and the control center increases the flow rate of the inhalation valve 10.
In addition, in the pressure control method of the present invention, the control center obtains the airway pressure according to the pressure of the air supply pipe 10 detected by the pressure sensor 50 at the air supply end of the air supply pipe 10.
When the airway pressure (namely the pressure of the air supply pipeline 20) is less than the sealing pressure of the expiratory valve 30, the expiratory valve 30 is closed, and the overflow flow rate of the expiratory valve 30 is 0; the entire flow of gas delivered by the inhalation valve 10 reaches the patient. When the airway pressure (namely the pressure of the air supply pipeline 20) is greater than the valve sealing pressure of the expiratory valve 30, the expiratory valve 30 is opened to carry out overflow pressure discharge, and the overflow flow rate is not 0; the flow of gas delivered by the inhalation valve 10 partly reaches the patient and partly overflows through the exhalation valve 30. From the above, the maximum value of the airway pressure is the valve-sealing pressure.
The sealing pressure of the exhalation valve 30 may be set according to actual patient requirements, and may be, for example, 5-90cmH2O, and the like.
The utility model discloses an anesthesia machine, which comprises the pressure control device; also comprises an air supply device. The gas supply is connected to the suction valve 10 of the pressure control device, and the delivery end of the delivery conduit 20 of the pressure control device is adapted to be connected to a patient.
The utility model discloses a respirator, which comprises the pressure control device; also comprises an air supply device. The gas supply is connected to the suction valve 10 of the pressure control device, and the delivery end of the delivery conduit 20 of the pressure control device is adapted to be connected to a patient.
The utility model discloses an among anesthesia machine or the breathing machine, under the pressure mode, set for inspiratory pressure, control CPU is according to the inspiratory pressure of setting for, airway pressure measurement value (the numerical value that pressure sensor 50 detected) and patient end velocity of flow (the numerical value that second flow sensor 60 detected), the velocity of flow of real time control inspiratory valve 10. During inspiration, when the airway pressure is less than the sealing pressure of the exhalation valve 30, the whole of the inspiration valve 10 aspirated air is delivered to the patient through the aspiration conduit 20; if the airway pressure exceeds the sealing pressure of the exhalation valve 30, a portion of the gas output by the inhalation valve 10 will be expelled from the exhalation valve 30. During expiration, the inhalation valve 10 is closed and the patient output gas is entirely expelled through the exhalation valve 30.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (5)
1. A pressure control device is characterized by comprising a control center, an inhalation valve connected with a gas supply device, a gas supply pipeline connected with the inhalation valve, an exhalation valve connected with the gas supply pipeline, and a first flow sensor arranged at the output end of the exhalation valve;
one end of the air supply pipeline, which is far away from the air suction valve, forms an air supply end; the inhalation valve, the exhalation valve and the first flow sensor are all in communication connection with the control center; the control center controls the flow rate of the air suction valve according to the flow rate of the air flow detected by the first flow sensor, and the pressure of the air supply pipeline is maintained.
2. The pressure control device of claim 1, further comprising a pressure sensor and a second flow sensor disposed on the air delivery conduit; and the pressure sensor and the second flow sensor are both in communication connection with the control center.
3. The pressure control device of claim 2, wherein the pressure sensor is located between the suction valve and a second flow sensor; the exhalation valve is located between the inhalation valve and the pressure sensor.
4. An anesthesia apparatus comprising the pressure control device of any one of claims 1-3.
5. A ventilator characterized by comprising the pressure control device according to any one of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921350121.3U CN210933251U (en) | 2019-08-19 | 2019-08-19 | Pressure control device, anesthesia machine and breathing machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921350121.3U CN210933251U (en) | 2019-08-19 | 2019-08-19 | Pressure control device, anesthesia machine and breathing machine |
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| CN210933251U true CN210933251U (en) | 2020-07-07 |
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| CN201921350121.3U Active CN210933251U (en) | 2019-08-19 | 2019-08-19 | Pressure control device, anesthesia machine and breathing machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110433368A (en) * | 2019-08-19 | 2019-11-12 | 深圳市诺然美泰科技股份有限公司 | Pressure control device and compress control method |
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2019
- 2019-08-19 CN CN201921350121.3U patent/CN210933251U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110433368A (en) * | 2019-08-19 | 2019-11-12 | 深圳市诺然美泰科技股份有限公司 | Pressure control device and compress control method |
| CN110433368B (en) * | 2019-08-19 | 2024-03-19 | 深圳市诺然美泰科技股份有限公司 | Pressure control device and pressure control method |
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