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Test Code:
COHB

Order Name:
Carbon Monoxide (Carboxyhemoglobin) (Blood) **

 
Useful For:

Verifying carbon monoxide toxicity in cases of suspected exposure.

 
Methodology:
Blood Gas (Co-oximetry, Spectrophotometry)
 
AliasesName:
Carboxyhemoglobin
CO (Carbon Monoxide)
Carbon Monoxide (Carboxyhemoglobin)
 
 
 
Test Code:
COHB

Order Name:
Carbon Monoxide (Carboxyhemoglobin) (Blood) **

 
Collection Specimen Or Container:
Blood/ Lithium Heparin Blood (Green Top) 6 mL, 1 tube
Sent to Laboratory immediatly
 
Specimen Testing Type:
Blood/ Lithium Heparin Blood (Green Top) 6 mL, 1 tube
 
 
 
Test Code:
COHB

Order Name:
Carbon Monoxide (Carboxyhemoglobin) (Blood) **

 
Method detail:
Blood Gas (Co-oximetry, Spectrophotometry)
 
Schedule:
N/A **Send out to Clinical Chemistry, Ramathibodi
 
Turnaround Time:
Received specimen to reported within 1 day
 
 
Performing Location:
Clinical Chemistry, Ramathibodi
Referral Lab Services, Laboratory Department 14160-2
 
 
 
Test Code:
COHB

Order Name:
Carbon Monoxide (Carboxyhemoglobin) (Blood) **

 
 
Clinical Information:

Carbon monoxide (CO) is a colorless, odorless, tasteless gas that is a product of incomplete combustion of carbonaceous material. CO poisoning causes hypoxia because CO binds to hemoglobin with an affinity 250 times greater than that of oxygen, thus preventing delivery of oxygen to the tissues, but concentrations greater than 20% are associated with symptoms of toxicity (eg, headache, fatigue, dizziness, confusion, nausea, vomiting, increased pulse and respiratory rate). CO levels greater than 50% are potentially fatal. Common exogenous sources of carbon monoxide include cigarette smoke, gasoline engines, and improperly ventilated home heating units. Small amounts of carbon monoxide are produced endogenously in the metabolic conversion of heme to biliverdin. This endogenous production of carbon monoxide is accelerated in hemolytic anemias.

 
Reference Value:
Carboxy Hemoglobin : Non smoker 0 -1.5 %, Smoker 1-2 pack/day 4 - 5 %, 2packs/day 8 - 9%
Methemoglobin : 0 - 1.5 %