EP 0445111 A4 19940105 -
Publication
Application
Priority
US 16086388 A 19880226
Abstract (en)
[origin: WO8907956A1] Methods and apparatus (80) for ascertaining whether there is at least a threshold concentration of carbon dioxide in gases being monitored. Reversible hydration of the carbon dioxide to generate excess hydrogen ions and trigger a color change in pH sensitive indicator (112) is employed in representative embodiments of the invention to provide an indication that the threshold concentration of carbon dioxide is present in the gases. The methods and apparatus may be used to distinguish between tracheal and esophageal intubation of human and other mammalian patients.
IPC 1-7
IPC 8 full level
A61M 16/04 (2006.01); G01N 31/22 (2006.01); A61B 5/083 (2006.01)
CPC (source: EP)
A61M 16/0488 (2013.01); A61M 16/0816 (2013.01); A61M 16/085 (2014.02); G01N 31/223 (2013.01); A61B 5/0836 (2013.01); A61M 2016/0413 (2013.01); A61M 2230/432 (2013.01)
Citation (search report)
- [A] H. U. BERGMEYER (ED.): "Methods of enzymatic analysis, 3rd. Edition", 1985, VCH VERLAGSGESELLSCHAFT, WEINHEIM, DE
- See references of WO 8907956A1
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
WO 8907956 A1 19890908; AU 3347189 A 19890922; EP 0445111 A1 19910911; EP 0445111 A4 19940105
DOCDB simple family (application)
US 8900760 W 19890224; AU 3347189 A 19890224; EP 89903316 A 19890224