According to Taber's Medical Dictionary, a bolus dose is a quantity of fluid or medication given intravenously at a controlled, rapid rate. Medscape explains that heparin is an intravenous medication that sometimes requires a bolus.
There are many things to consider when administering an intravenous medication bolus. Student Consult reveals that it is important to check that the correct patient is receiving the drug and that the patient has a patent IV site. The medication name, dose, route of delivery and expiration date should be checked and confirmed by another person, as stated by Student Consult. According to Student Consult, it is also important to verify the infusion rate of the medication being administered.