×

Ventilating apparatus

  • US 6,009,871 A
  • Filed: 11/12/1997
  • Issued: 01/04/2000
  • Est. Priority Date: 11/14/1996
  • Status: Expired due to Fees
First Claim
Patent Images

1. A ventilating apparatus for ventilating a patient during inspiration and expiration phases, the apparatus comprising:

  • a closed breathing loop;

    a dosing unit for dosing gases to said breathing loop needed for ventilating the patient thereby replenishing the quantity of respiratory gas consumed or lost to leakage;

    a respiratory gas pump unit connected to said closed breathing loop and said respiratory gas pump unit having a changeable volume so as to permit a predetermined pumped volume (VT) of said respiratory gas to be pumped into said breathing loop during said inspiration phase;

    a metering unit for metering a gas volume (VF) into said closed breathing loop during said inspiration phase;

    means for detecting said gas volume (VF) metered into said closed breathing loop by said metering unit during said inspiration phase;

    means for forming a difference volume (VT -VF) between said predetermined pumped volume (VT) and said gas volume (VF); and

    ,means for applying said difference volume (VT -VF) as a new adjusting value for the volume of respiratory gas pumped by said respiratory gas pump unit.

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