What is an IV bolus?

An IV bolus refers to the rapid administration of a specific volume of a drug directly into the bloodstream via the intravenous route all at once. This method allows for immediate therapeutic effects, making it particularly useful in emergency situations or when prompt medication action is necessary. The key characteristic of a bolus is the speed and volume of the administration, which contrasts with other methods that may involve slower or more prolonged delivery of medications.

In contrast, continuous infusion involves delivering medication over an extended period, which is not indicative of a bolus. Gradual administration over several hours signifies a slow and controlled delivery method, differing from the concept of a bolus that focuses on quick, one-time delivery. Lastly, infusion through the skin suggests a different route of administration altogether, which is not applicable in the context of an IV bolus since this method specifically refers to intravenous delivery.