What is a bolus in IV therapy?

In IV therapy, a bolus refers to the rapid administration of a specific volume of fluid or medication. This method is utilized when immediate therapeutic effects are necessary, such as delivering an emergency medication or fluid resuscitation. A bolus is typically delivered quickly to achieve a fast onset of action, which can be critical in acute medical situations.

Understanding this concept is essential because it differentiates a bolus from other forms of administration, such as a slow infusion over hours, which is more gradual and isn't intended for acute situations. Other methods, like a continuous drip of fluids, provide a steady rate of administration over an extended period, while warming IV fluids before administration is more about comfort and avoiding complications associated with cold fluids. The bolus method highlights the importance of timing and volume in IV therapy, ensuring that patients receive the necessary interventions promptly.