Ventilating apparatus

Details Ventilating apparatus Ventilating apparatus

1997-11-12

2000-01-04

Weiss, John G.

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

12820423, 12820328, 12820518, 12820312, A61M 1600

Patent

active

060098716

ABSTRACT:
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).

REFERENCES:
patent: 4262686 (1981-04-01), Heim et al.
patent: 5005570 (1991-04-01), Perkins
patent: 5119810 (1992-06-01), Kiske et al.
patent: 5678540 (1997-10-01), Kock et al.
patent: 5810002 (1998-09-01), Dittmann
patent: 5823186 (1998-10-01), Rossen et al.

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