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Device and method for determining a fertile phase of a woman by ascertaining a CO;partial pressure in a respiratory gas of the woman

  • US 9,392,997 B2
  • Filed: 05/25/2011
  • Issued: 07/19/2016
  • Est. Priority Date: 05/25/2010
  • Status: Active Grant
First Claim
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1. A device for determining a fertile phase of a woman by ascertaining a CO2 partial pressure in a respiratory gas of the woman in several consecutive breaths, comprising:

  • an inlet for receiving the respiratory gas,an outlet, a sample chamber, into which the respiratory gas is conducted,a measuring module with a measuring element with which a CO2 concentration in the respiratory gas in the sample chamber is measurable,a processor for processing measured data obtained by the measuring module, andat least one output unit for outputting a result of the measured data,wherein the device is embodied as a hand-held device and an algorithm is stored in the processor, with which with a measurement based on several immediately consecutive breaths a predetermined reproducibility criterion regarding an end expiratory CO2 partial pressure of the respiratory gas is testable,wherein, if the reproducibility criterion is met, the at least one output unit outputs and/or signals and/or displays whether a fertile phase applies,wherein the predetermined reproducibility criterion is met when the measured data based on several immediately consecutive breaths are within a predetermined tolerance range; and

    wherein the algorithm based on the measured data of a cycle calculates a base line for the end expiratory CO2 partial pressure in a follicle phase outside the fertile phase.

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