Define the term "perfusion" in a medical context.

Perfusion in a medical context refers to the process by which blood is delivered to the tissues of the body, carrying essential oxygen and nutrients necessary for cellular metabolism. This is crucial for maintaining tissue viability and function. During perfusion, arterial blood flows through capillaries, facilitating the exchange of oxygen and carbon dioxide, as well as other nutrients and waste products.

This process is vital for all organs and tissues, as inadequate perfusion can lead to tissue ischemia and organ dysfunction. It is an important concept in emergency medicine and critical care, where monitoring and ensuring adequate perfusion can be pivotal for patient outcomes. Understanding perfusion aids healthcare professionals in identifying and managing conditions such as shock, where blood flow to tissues is compromised, illustrating its significance in clinical practice.