Patent ID: 6776163
Filing Date: 2004-08-17
Classification: A61M

Abstract:
A nasal cannula for use in administering a gas under pressure through a nasal passage of a user, comprising at least one tubular nasal prong assembly includingan inner tubular prong having a distal end to be placed in or adjacent the nasal passage and a proximal end for connection to a supply line for the gas and an outer sleeve extending over at least a portion of the inner tubular prong to define with the inner tubular prong an annular passage, wherein said outer sleeve is in the form of a shroud which extends over a portion of said inner tubular prong and is spaced from the inner tubular prong by at least one support, the annular passage being in communication with the supply line, the arrangement being such that when gas flows through the supply line most will pass through the distal end of the inner tubular prong for delivery to the nasal passage but some will pass through the annular passage to form a shielding stream.