초록 ▼

A ventilating apparatus includes a closed breathing loop (3) which is supplied with the gases needed for ventilation via a metering unit (9). The ventilating apparatus is improved in such a manner that the respiratory gas can be metered during the inspiration phase without affecting the respiratory

A ventilating apparatus includes a closed breathing loop (3) which is supplied with the gases needed for ventilation via a metering unit (9). The ventilating apparatus is improved in such a manner that the respiratory gas can be metered during the inspiration phase without affecting the respiratory gas stroke volume supplied to the patient. The ventilating apparatus includes a flow-measuring device (14) for detecting a gas volume (V.sub.F) which is metered into the closed breathing loop (3) during the inspiration phase. A subtraction element (16) forms a difference volume (V.sub.T -V.sub.F) between the pump volume (V.sub.T) and the gas volume (V.sub.F). A switch (21) permits utilizing the difference volume (V.sub.T -V.sub.F) as a new adjusting value for the pump volume of the respiratory gas pump unit (2).

대표청구항 ▼

[ What is claimed is:] [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 respi

[ What is claimed is:] [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 (V.sub.T) of said respiratory gas to be pumped into said breathing loop during said inspiration phase;a metering unit for metering a gas volume (V.sub.F) into said closed breathing loop during said inspiration phase;means for detecting said gas volume (V.sub.F) metered into said closed breathing loop by said metering unit during said inspiration phase;means for forming a difference volume (V.sub.T -V.sub.F) between said predetermined pumped volume (V.sub.T) and said gas volume (V.sub.F); and,means for applying said difference volume (V.sub.T -V.sub.F) as a new adjusting value for the volume of respiratory gas pumped by said respiratory gas pump unit.