Intravenous
Intravenous (Latin for "within a vein"), or infusion, refers to delivering medicine, fluids or nutrients into the body's blood via a . Veins are commonly used for delivery of fluids and nutrients over time because venous pressure does not vary as much as arterial pressure, permitting more consistent, accurate delivery. Medications that are most effectively delivered over time are commonly administered intravenously, also, either by hypospray or by intravenous unit, or drip.

Intravenous injection is impossible for Andorians because of their unusual physiology; instead, a doctor has to opt for intramuscular injection. ()

In 2268, Christine Chapel threatened Ensign Garrovick that Doctor Leonard McCoy would have him intravenously fed if he didn't eat the dinner she had brought him. ()

In 2373, Dr. Julian Bashir ordered an IV drip of poly-nutrient solution for Odo after the Changeling's rescue from a Class L planet. ()

See also 
 Assimilation tubule
 OrthoLav

External link 
 

it:Endovena
Medical procedures