ADAM HART-DAVIS / SCIENCE PHOTO LIBRARY ADAM HART-DAVIS / SCIENCE PHOTO LIBRARY
An intravenous drip inserted in a vein on a patient's hand. An intravenous drip is used for the continuous administration of blood, plasma, saline, glucose solution or drugs. A type of hollow needle known as a butterfly cannula is inserted into a vein and connected up to a bag or bottle suspended above the patient. The rate of flow is adjusted according to the rate of drips seen in a transparent chamber in the tube (not shown here), which also serves as a trap for bubbles.
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