Catecholamines in BloodAdrenaline Measurement in Blood, Dopamine Measurement in Blood, Epinephrine Measurement in Blood, Metanephrine Measurement in Blood, Noradrenaline Measurement in Blood, Norepinephrine Measurement in Blood, Vanillymandelic Acid Measurement in Blood RisksThere is very little chance of a problem from having blood sample taken from a vein. - You may get a small bruise at the site. You can lower the chance of bruising by keeping pressure on the site for several minutes.
- In rare cases, the vein may become swollen after the blood sample is taken. This problem is called phlebitis. A warm compress can be used several times a day to treat this.
- Ongoing bleeding can be a problem for people with bleeding disorders. Aspirin, warfarin (Coumadin), and other blood-thinning medicines can make bleeding more likely. If you have bleeding or clotting problems, or if you take blood-thinning medicine, tell your doctor before your blood sample is taken.
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