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Respiratory assistance device

  • US 6,173,711 B1
  • Filed: 10/23/1997
  • Issued: 01/16/2001
  • Est. Priority Date: 10/30/1996
  • Status: Expired due to Fees
First Claim
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1. Respiratory assistance device, comprising:

  • an inhalation branch which is permanently connected, at its upstream end, to a first pressurized gas flow source and, at its downstream end, to a user'"'"'s airways;

    at least a first exhalation valve and a second exhalation valve;

    said exhalation valves being arranged on said inhalation branch and controlled so that said exhalation valves are closed during a user'"'"'s inhalation phase;

    a drive means for controlling the first pressurized gas flow source and delivering a stream of gas with substantially constant non-zero flow rate to the inhalation branch throughout a user'"'"'s exhalation phase; and

    a detection means located in proximity to the downstream end of the inhalation branch, for detecting a user'"'"'s respiratory activity, and sending a respiratory activity data item to the drive means.

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