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Laboratory:	Clinical Biochemistry
Test Name:	CARBOXYHEMOGLOBIN - (B) Test Code: CBHB
Clinical Information:	Test performed at: St. Boniface Hospital This test is intended for routine (same day) service requests. Collect blood for carboxyhemoglobin analysis as soon as possible following exposure to carbon monoxide. Half-life of carboxyhemoglobin in a patient is 320 min when breathing room air and 80 min when breathing 100% oxygen. Once collected, unopened sample is stable for 2 weeks.
Collection Devices:	Preferred Device: 1 - Li Heparin, NO GEL 4.0 mL Tube(s) - Full Tube Collection Li Heparin, NO GEL 4.0 mL Tube(s) - Full Tube Collection Manufacturer: BD (Becton Dickinson) Catalogue #: 367884 DO NOT use grey top Na Fluoride tube.
Specimen Required:	Blood: 4.0 mL
Referral:	Whole Blood: 4.0 mL Collected in Lithium Heparin, No Gel Tube (Full Tube Collection). Do not centrifuge.
Requisition:	_SH Biochemistry Hematology Requisition (R250-10-92) _SH Hospital Biochemistry Hematology Non Winnipeg Brandon (R250-10-91) _SH Winnipeg Brandon Biochemistry Hematology Requisition (R250-10-94) _SH Winnipeg Brandon Hospital Biochemistry Hematology Requisition (R250-10-93)
Reference Values:	Non-Smoker: <2% Heavy Smoker: <15% Toxic: >20% Lethal: >50%
Availability:	Daily or Stat
See Also:
More Information:	Blood is not to be centrifuged. HSC in-patients and acute samples will be dealt with directly by Respiratory. Collect out-patient blood for carboxyhemoglobin analysis and send without delay to SBH Chemistry.