Patent ID: 8826905

Claim:
A breathing circuit apparatus for use with a face mask, the fresh gas output of a gas delivery device, and a vacuum source, comprising: a main tubular limb, a branched coupling, and a scavenging limb; said main tubular limb having opposed first and second ends; said main tubular limb defining a gas supply lumen of first diameter and an exhalation lumen of second diameter disposed co-axially with respect to said first diameter lumen along substantially the entire length thereof; said first end of said main tubular limb in fluid communication with a gas coupling member for removable attachment to said face mask; said branched coupling being attached to said second opposed second end of said main tubular limb and defining a main tubular limb connection port, a gas supply connection port and a scavenging limb connection port; said branched coupling including a first gas flow passage extending between said main limb connection port and said fresh gas supply port for supplying fresh gas to said main limb gas supply lumen and a second gas flow passage extending between said main limb connection port and said scavenging limb connection port for receiving exhaled waste gas from said face mask through said gas coupling member and said main limb exhalation lumen; said scavenging limb further including a one-way valve, a flexible exhalation bag, and a scavenging tube; said flexible exhalation bag having an entry opening and an exit opening, said one-way valve being disposed in said scavenging limb between said branched coupling scavenging limb connection port and said entry opening of said flexible exhalation bag such that said entry opening is connected to said branched coupling scavenging limb connection port through said one-way valve, permitting unidirectional flow of exhaled waste gas from said face mask through said branched coupling scavenging limb connection port into and through said entry opening; and said scavenging tube connected to said exit opening for conveying to said vacuum source exhaled waste gas received in said flexible exhalation bag from said branched coupling scavenging limb connection port through said one-way valve; said exhaled waste gas being evacuated from the environment surrounding a patient when said breathing circuit apparatus is disposed in fluid communication between said face mask, said gas delivery device and said vacuum source and said patient breathes through said mask and said breathing circuit; said breathing circuit apparatus being disposable after a single-use to avoid cross-contamination from one patient to another.