What does the term “bolus” mean in IV therapy?

In IV therapy, the term "bolus" refers specifically to a single, large dose of medication or fluid that is administered rapidly over a short period of time. This approach is often utilized when a quick therapeutic effect is needed, such as in emergency situations or to quickly replenish fluids or electrolytes in a patient.

When administering a bolus, healthcare providers can ensure that the medication achieves therapeutic levels promptly. This is particularly important in scenarios where immediate treatment is critical, such as in the case of pain management, shock, or severe dehydration. The large volume delivered at once allows for a swift increase in blood concentration of the medication.

In contrast, other options focus on different methods of medication or fluid administration. A small dose refers to a more gradual or limited intervention, while continuous infusion and slow, hourly administration involve delivering medications or fluids over longer periods, which do not match the immediate and higher volume characteristic of a bolus.