US 9,808,593 B1
Apparatus for enhancement of oxygen and/or air flow control to nasal prongs
Rangasamy Ramanathan, La Canada, CA (US); Arnold M. Heyman, Los Angeles, CA (US); Thomas R. Thornbury, Los Angeles, CA (US); and Craig R. McCrary, Los Angeles, CA (US)
Assigned to Neotech Products LLC, Valencia, CA (US)
Filed by Rangasamy Ramanathan, La Canada, CA (US); Arnold M. Heyman, Los Angeles, CA (US); Thomas R. Thornbury, Los Angeles, CA (US); and Craig R. McCrary, Los Angeles, CA (US)
Filed on Feb. 6, 2012, as Appl. No. 13/385,149.
Int. Cl. A61M 15/08 (2006.01); A62B 7/00 (2006.01); A61M 16/06 (2006.01); A61M 16/08 (2006.01)
CPC A61M 16/0672 (2014.02) [A61M 16/0816 (2013.01)] 5 Claims
OG exemplary drawing
 
1. An improvement for a nasal cannula apparatus that includes a pair of tubular prongs receivable in an infant's nostrils to deliver oxygen, or oxygen and air flow to the infant, said prongs each having flow passing area A3, the improvement comprising
a) an inlet tubular adaptor sized and configured to directly endwise connect to a source of oxygen, or oxygen and air, said adaptor defining an inlet flow passage area A1 and said adaptor having a 15 mm external diameter,
b) said adaptor defining two like outlet flow passages operatively connectible with said nasal cannula apparatus incorporating said prongs, there being two parallel venturi passages intervening between said adaptor inlet flow passage and outlets defined by said adaptor outlet flow passages, said venturi passages having overall width less than a diameter of said inlet flow passage defined by the adaptor, said adaptor outlet flow passages each having area
A2, where A1>A2>A3.