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Method and apparatus for using an inhalation sensor for monitoring and for inhalation therapy

  • US 5,052,400 A
  • Filed: 10/25/1988
  • Issued: 10/01/1991
  • Est. Priority Date: 02/20/1986
  • Status: Expired due to Fees
First Claim
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1. An apparatus for sensing the breathing of a human and for inhalation therapy, comprising:

  • a pressure capacitance transducer for developing pressure variations internally of the pressure capacitance transducer in response to the breathing of said human,a supply of therapeutic gas,said transducer having an inlet connected to said supply of therapeutic gas and an outlet adapted for connection to the respiratory system of said human for developing a negative pressure,sensing means internally of said pressure capacitance transducer for sensing each time a negative pressure occurs internally of the pressure capacitance transducer corresponding to the inhalation of said human,means responsive to said sensing means for developing individual electrical signals in response to the sensing of each said negative pressure,timing means co-acting with said individual electrical signals for controlling predetermined periods of therapeutic gas flow through said pressure capacitance transducer to the respiratory system of said human, said gas flow being interrupted in the absence of said electrical signals,filtering means connected between said gas supply and said pressure capacitance transducer for filtering said therapeutic gas,said pressure capacitance transducer further comprising an eductor means for removing moisture from internally of said transducer,said eductor means being a tube having an inlet connected to said transducer inlet and an outlet disposed internally of said transducer and substantially aligned and separated from said transducer outlet for creating suction, thereby removing any moisture within said transducer.

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