US 7,320,320 B2
Determination of patency of the airway
Michael Berthon-Jones, Leonay (Australia)
Assigned to ResMed Limited, Bella Vista, NSW (Australia)
Filed on Dec. 15, 2003, as Appl. No. 10/737,267.
Application 10/737267 is a division of application No. 09/484761, filed on Jan. 18, 2000, granted, now 6,675,797.
Application 09/484761 is a continuation of application No. 08/950322, filed on Oct. 14, 1997, granted, now 6,029,665.
Application 08/950322 is a continuation of application No. 08/335118, filed on Nov. 04, 1994, granted, now 5,704,345.
Claims priority of application No. PM2246 (AU), filed on Nov. 05, 1993.
Prior Publication US 2004/0123866 A1, Jul. 01, 2004
This patent is subject to a terminal disclaimer.
Int. Cl. A62B 7/00 (2006.01); A62B 9/00 (2006.01); A61M 16/00 (2006.01); F16K 31/02 (2006.01); G05B 1/00 (2006.01)
U.S. Cl. 128—204.23  [128/204.18; 128/204.21; 128/205.11; 128/205.23] 10 Claims
OG exemplary drawing
 
7. An apparatus for determining patency of an airway of a patient, the apparatus comprising:
a pressure transducer for generating an air flow signal representative of respiratory air flow from the patient; and
a processor programmed to determine if the airway is patent by an analysis of said air flow signal to detect the presence of cardiogenic air flow.