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Description

The clinical test hemoglobin (Hb) is a measure of the amount of hemoglobin in a patient's plasma. It is typically obtained through a blood sample. The sample is collected by a healthcare professional using a needle and syringe. The sample is then sent to a laboratory for analysis. The laboratory will measure the amount of hemoglobin in the sample using a spectrophotometer. This instrument measures the amount of light absorbed by the hemoglobin molecules in the sample. The results are then reported as a numerical value, usually in grams per deciliter (g/dL). The normal range for hemoglobin is typically between 12 and 16 g/dL.

Synonyms

• free Hb
• free hemoglobin
• free Hgb
• Hb
• Hgb

Other Sample Sources for This Test

• feces
• plasma
• pleural fluid
• urine
• whole blood

Some Diseases Associated with an Abnormal Hemoglobin

• heart valve disorder
• Gilbert syndrome
• anemia
• influenza
• pneumonia
• chronic kidney disease
• nonmedicinal toxicity
• diffuse connective tissue disease
• drug side effect

Detailed Laboratory Testing Information (use the custom search buttons below to find details on these topics)

All of the following must be considered when interpreting clinical findings and are too extensive to be covered on this site: