HIGH FLOW VENTILATION SYSTEM FOR ENDOSCOPY PROCEDURES

摘要

A high flow ventilation system delivers oxygen-enriched air to a patient at flow rates greater than 10 L/min using only conventional wall flow meters as found in most hospitals. The ventilation system combines the output of a plurality of wall flow meters into a specially configured gas mixing apparatus. The gas mixing apparatus provides oxygen-enriched air with an FiO2 (fraction of inspired oxygen) of approximately 21-100% with a total oxygen flow rate of 10-20 L/min or higher as required for high flow ventilation therapy. The oxygen-enriched air is delivered to the patient through a bite block device that allows insertion of an endoscope while simultaneously delivering high flow ventilation therapy to the patient through a large annular air flow passage around the endoscope.

主权项

1. A high flow ventilation system for delivering oxygen-enriched air to a patient, the system comprising:
a tubular housing with a wall enclosing a first gas mixing chamber and a second gas mixing chamber; a first oxygen inlet for connection to a first source of pressurized oxygen; a first jet orifice within the tubular housing, the first jet orifice being connected to the first oxygen inlet and directed into the first gas mixing chamber; a first air entrainment port extending through the wall of the tubular housing and connecting to the first gas mixing chamber proximate to the first jet orifice; a second oxygen inlet for connection to a second source of pressurized oxygen; a second jet orifice within the tubular housing, the second jet orifice being connected to the second oxygen inlet and directed into the second gas mixing chamber; a second air entrainment port extending through the wall of the tubular housing and connecting to the second gas mixing chamber proximate to the second jet orifice; and an outflow port for oxygen-enriched air connected to the first gas mixing chamber and the second gas mixing chamber within the tubular housing.