Patent ID: 11865258
Assignee: BMC MEDICAL CO., LTD.
Field: Medical technology (Instruments)
Classification: CPC A  G | IPC A

Claim 4:
5. A device for determining a flow in a positive pressure ventilation therapy machine, comprising:
a sensor that measures a current pressure value for a draught fan of the positive pressure ventilation machine;
a processor; and
a memory, wherein a computer program capable of operating on the processor is stored in the memory; and
the processor is communicatively coupled to the sensor and the memory, wherein, the processor is configured to:
acquire a current operating parameter of the positive pressure ventilation therapy machine;
acquire the current pressure value for the draught fan of the positive pressure ventilation therapy machine;
find a target relational expression corresponding to the current pressure value in a preset list according to the current pressure value, wherein the preset list comprises a plurality of pressure values and relational expressions corresponding to the plurality of pressure values, and each of the relational expressions corresponding to the plurality of pressure values is a relational expression between operating parameters of the draught fan and a gas flow output by the positive pressure ventilation therapy machine; and
determine a current gas flow output by the positive pressure ventilation therapy machine according to the current operating parameter and the target relational expression;
wherein the current gas flow output by the positive pressure ventilation therapy machine is determined according to the current operating parameter and the target relational expression comprises:
performing a calculation according to, F
  =
  
    
      1
      B
    
    ⁢
    
      ln
      ⁡
      
        (
        
          P
          K
        
        ), to obtain the current gas flow output by the positive pressure ventilation therapy machine, wherein F is the gas flow, P is the current operating parameter, B and K are conversion coefficients, and the conversion coefficients are related to the current pressure value.