Dynamic calibration device for zero position of flow sensor of anaesthesia machine and dynamic calibration method

A flow sensor and dynamic calibration technology, applied in the field of anesthesia machines, to achieve the effect of eliminating zero calibration errors

Pending Publication Date: 2021-03-30
上海力申科学仪器有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the zero calibration of the flow sensor can only be carried out during standby, which can only solve the p...

Method used

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  • Dynamic calibration device for zero position of flow sensor of anaesthesia machine and dynamic calibration method
  • Dynamic calibration device for zero position of flow sensor of anaesthesia machine and dynamic calibration method

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings.

[0031] figure 1 It is a schematic diagram of the patient side of anesthesia machine ventilation. When the anesthesia machine is ventilating, during the inhalation phase, the gas flows from the patient circuit to the patient. Because of the effect of CV2, the air flow will not go through the B2 path, but can only flow into the patient from the B1 path, so the air flow direction during inhalation is: Patient circuit → CV1 → SE1 → B1 → patient, SE1 can measure the flow at this time, and the inhalation capacity can be obtained by integrating the flow, SE2 has no flow, so the flow measured by SE2 is 0 in theory; During the phase, the gas flows from the patient to the patient circuit. Because of the function of CV1, the air flow will not go through the B1 path, but can only flow into the patient from the B2 path. Therefore, the air flow direction during exhalation is: patie...

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Abstract

The invention discloses a dynamic calibration device for a zero position of a flow sensor of an anaesthesia machine and a dynamic method thereof, and the device and method can achieve the zero calibration of an expiration flow sensor during inspiration and the zero calibration of the inspiration flow sensor during expiration, and achieve the real-time zero calibration of the anaesthesia machine during operation without shutdown for zero calibration. The zero calibration of the inspiration flow sensor and the expiration flow sensor can be completed in one ventilation period. The inspiration andexpiration are alternately carried out, zero calibration and measurement are also alternately carried out, the device can be immediately used for next flow measurement after zero calibration each time, even if zero drift occurs in the using process, zero drift can be immediately eliminated, and real-time, non-stop and dynamic zero calibration is truly achieved. The zero calibration is automatically carried out, manual operation is not needed, and zero calibration errors caused by human factors are eliminated.

Description

technical field [0001] The invention relates to an anesthesia machine, in particular to a dynamic calibration device and a dynamic calibration method for the zero position of a flow sensor of an anesthesia machine. Background technique [0002] The anesthesia machine is a life support system used in hospital operating rooms to perform general anesthesia on surgical patients. Its main functions are respiratory management, oxygen supply, and inhalation of anesthetics for patients. The anesthesia machine ventilates the patient at a certain frequency and measures the volume of gas inhaled by the patient (hereinafter referred to as inhalation volume) and the volume of gas discharged (hereinafter referred to as tidal volume). In practical use, inspiratory volume and tidal volume are important clinical parameters. [0003] Both inspiratory volume and tidal volume are measured by flow sensors. When the patient is inhaling, the inhalation capacity is obtained by integrating the mea...

Claims

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Application Information

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IPC IPC(8): A61M16/01A61M16/00
CPCA61M16/01A61M16/024A61M16/0003A61M2016/0036A61M2205/702
Inventor 袁方
Owner 上海力申科学仪器有限公司
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