A bolus is a type of intravenous (IV) injection that is used to rapidly deliver a large dose of medication or fluid into the bloodstream. Bolus injections are usually given over a short period of time, usually a few seconds, and are designed to quickly and effectively treat conditions that require prompt intervention. The bolus form of medication is typically used in emergency situations, such as cardiac arrest or severe dehydration, where rapid and effective treatment is required. Bolus injections are delivered via an IV catheter, which is inserted into a vein and connected to a bag of fluid or medication. The bag is rapidly infused into the bloodstream through the IV catheter, providing the necessary treatment. It is important to use the bolus form of medication under the guidance of a healthcare professional, as improper administration can increase the risk of complications.