To flow (or be forced) from a vessel.
Outside of a vessel.
That which is outside a vessel (especially blood or other bodily fluids).
To perform a phlebotomy on (a vein): to open (a vein) to withdraw or let blood.
To perform a phlebotomy on (a person): to open a vein of (a person) to withdraw or let blood.
To perform a phlebotomy; to open a vein to withdraw or let blood.