Continuous positive airway pressure system
AssigneeThe United States of America as represented by the Department of Health and Human Services
InventorTheodor Kolobow
Life of this patent
Estimating the term…
Abstract
A passive continuous positive airway intratracheal pulmonary ventilation system which includes an inspiration limb and an expiration limb which are pressure balanced by inflatable bags. An intratracheal pulmonary ventilation system is provided which includes a catheter having a tip which is positioned through a low resistance endotracheal tube at or near a patient's carina. A constant source of an oxygen-containing gas flows through the catheter. The catheter has a tip which deflects and reverses the flow direction of the oxygen-containing gas.
Claims14
A passive continuous positive airway intratracheal pulmonary ventilation apparatus which comprises:
- an inspiration limb having an inspiration passageway with a one way valve therein:
- an expiration limb having an expiration passageway with a one way valve therein and an exhaust port;
- a connector joining an end of each of the inspiration passageway and the expiration passageway so that the inspiration passageway and expiration passageway are in communication with each other;
- an endotracheal tube, one end in communication with both the expiration passageway and the inspiration passageway via the connector;
- and
- means for generating a constant positive pressure in each of the inspiration limb and the expiration limb and for maintaining the constant positive pressure at a near equal level in each of the inspiration limb and the expiration limb, the positive pressure generating and maintaining means further comprising a first inflatable bag in communication with the inspiration passageway, a second inflatable bag in communication with the expiration passageway, a throttle valve as said exhaust port to provide a constant expiratory leak during inspiration and expiration and a means for applying a constant force to each of the first and second inflatable bags;
- whereby a oxygen containing gas is supplied to a patient via the inspiration passageway and endotracheal tube and expiration flow from said patient is supplied to said expiration passageway via the endotracheal tube and wherein maintaining of the constant positive pressure to a nearly equal level permits a patient to both inhale and exhale at peak inspiratory and expiratory flow rates without a resistance which Would cause patient exhaustion or shortness of breath.
Dependencies are inferred from the claim text.