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Method for judging the reverse connection of a flow sensor and a respiratory mechanics measuring module used therein

  • US 7,861,711 B2
  • Filed: 12/08/2006
  • Issued: 01/04/2011
  • Est. Priority Date: 01/20/2006
  • Status: Active Grant
First Claim
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1. A method for judging the reverse connection of a flow sensor in a respiratory mechanics measurement, comprising the following steps of:

  • a. connecting the flow sensor to a respiratory mechanics measuring module;

    b. sampling consecutively airway pressures and flows of a respiratory gas flowing between a patient and an anaesthetic machine; and

    c. judging that the flow sensor is reversedly connected and sending an alarm signal indicating the reverse connection of the flow sensor to a main controller when any one of the following two instances appears;

    c1) when the airway pressure decreases to the lowest point, the flow has a negative value while the patient is inhaling; and

    c2) around the time when the pressure intensity decreases the fastest, the flow has a positive value.

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