×

Breathing aid device

  • US 5,664,562 A
  • Filed: 03/13/1995
  • Issued: 09/09/1997
  • Est. Priority Date: 09/18/1992
  • Status: Expired due to Term
First Claim
Patent Images

1. Breathing aid device of the type with inspiration under substantially constant pressure, comprising a patient circuit (1) having an inspiratory branch (11) connected to a pressurized inspiratory flow source (3) and an expiratory branch (4) in which is installed an expiration valve (VE) which is controlled so as to be closed during inspiration, the device also comprising electronic control (12) connected to at least one sensor (18, 19) detecting the respiratory activity of the patient and distribution means (VI) which in inspiratory phase establish the communication between the inspiratory flow source (11) and the inspiratory branch (3) of the patient circuit, and in expiratory phase interrupt this communication at least partially, characterized in that the distribution means (VI) are controlled by the driving means (12), which control the interruption of the said communication when the sensor detects that the patient is preparing an expiratory phase, and in that the driving means (12) also control, at least indirectly, the expiration valve (VE) in order that it determines a predefined expiratory pressure substantially independent of the operating state of the inspiratory flow source (11).

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×