If a vein has been punctured, raise your entire arm over your head while applying pressure. Some discoloration, soreness or swelling may develop at the venepuncture site. This responds well to moist, warm compresses applied every 2 to 4 hours. Activity after test Return to pretest activities right away. Use warm compresses if blood collects under the puncture site or if the area becomes tender, red or painful.
Inaccurate results do occur.
Time before test results available Test requires only a few minutes in the laboratory. Time before results are reported to the doctor or patient varies from a few Test results Test Values Test results are determined by radio-immunoassay and reverse passive hemagglutination. Normal Values Negative for hepatitis-B surface antigen. Factors Affecting Results Taking these drugs may affect test results None expected. Other factors that may affect test results None expected.