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Anaesthesia

Title:		Nitrite-induced methaemoglobinaemia - aetiology, diagnosis and treatment
Author(s):		Chui, J. S. Poon, W. T. Chan, K. C. Chan, A. Y. Buckley, T. A.
Address:		Department of Intensive Care, Hospital Authority Toxicology Reference Laboratory.
Year:		2005 May
Journal Title:		Anaesthesia
Page Number:		496-500
Language:		eng
Volume:		60
Issue:		5
ISSN/ISBN:		0003-2409 (Print)
Abstract:		A 41-year-old woman presented with the clinical features of methaemoglobinaemia after drinking Chinese herbal medicine. A life threatening methaemoglobin level of 68% was measured. Both clinical and laboratory diagnostic difficulties were encountered. The pitfalls of pulse oximeter, blood gas analysis and co-oximeter interpretation during diagnosis and after methylene blue administration are discussed.