BSIP, LA / SCIENCE PHOTO LIBRARY BSIP, LA / SCIENCE PHOTO LIBRARY
Taking blood. Nurse taking a blood sample from a patient. The tourniquet around the patient's right arm restricts blood flow, causing the veins to stand up for easy access. The blood has been drawn through a needle, under a partial vacuum into a tube (vacutainer, lower centre). The nurse is using a swab to mop excess blood.
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