Perfusion

Definition

Perfusion is the process by which blood is delivered to tissue, allowing for the exchange of oxygen, carbon dioxide, and other nutrients and waste products. Adequate perfusion is essential for maintaining cellular function and overall health.

5 Must Know Facts For Your Next Test

1. Perfusion is crucial for effective gas exchange in the alveoli of the lungs.
2. Poor perfusion can lead to hypoxia, where tissues do not receive enough oxygen.
3. Medications like vasodilators can improve perfusion by widening blood vessels.
4. Perfusion is often measured using indicators such as capillary refill time and blood pressure.
5. Conditions like pulmonary embolism or congestive heart failure can significantly impair perfusion.

Review Questions

• Why is adequate perfusion necessary for effective gas exchange in the lungs?
• How might pharmacologic agents affect perfusion in patients with respiratory issues?
• What are some clinical signs that indicate poor perfusion?

Related terms

Oxygenation: The process by which oxygen molecules are loaded onto hemoglobin molecules in the bloodstream.

Hypoxia: A condition where there is a deficiency of oxygen reaching the tissues.

Vasodilation: The widening of blood vessels, which decreases vascular resistance and increases blood flow.