Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1997-04-04
1998-05-19
Millin, Vincent
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820418, A61M 1600
Patent
active
057525072
ABSTRACT:
Method and apparatus for ventilating lungs of different compliance with a predetermined ratio of volumes using one respirator are provided. The method comprises: (a) pumping fluid into a first and second inspiratory passageways, the first passageway being in fluid communication with a more resistive lung and the second passageway being in fluid communication with a less resistive lung; (b) regulating the flow of fluid within the second passageway by means of a regulating element, the regulating element being automatically controlled by means of a controlling element according to the volumes expired by the first and second lungs. The apparatus includes: (a) a single respirator; (b) a first and second inspiratory passageways in fluid communication with respective first and second lungs, the first lung being more resistive to ventilation than the second lung; (c) a pneumatic regulating element connected to the second passageway for regulating the flow of fluid within the second passageway; and (d) a controlling element for automatically controlling the regulating element based on the volumes expired by the first and second lungs.
REFERENCES:
patent: 4233984 (1980-11-01), Walling
patent: 4598706 (1986-07-01), Darowski et al.
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Pace et al, "Differential Lung Ventilation After Unilateral Hydrochloric Acid Aspiration in the Dog", Critical Care Med., vol. 11, No. 1, pp. 17-20 (1983).
East, et al., "Synchronous Versus Asynchronous Differential Lung Ventilation with PEEP after Unilateral Acid Aspiration in the Dog", Critical Care Med., vol. 11, No. 6, pp. 441-444 (1983).
Nishimura, et al., "High-Frequency Jet Ventilation for Differential Lung Ventilation", Critical Care Med., vol. 12, No. 9, pp. 840-841 (1984).
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Friedman Mark M.
Millin Vincent
Wieland Robert N.
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