PRN is a common medical abbreviation meaning 'as needed,' often used in medication instructions.

The Fowler's position, where the patient is seated at a 45- to 60-degree angle, is commonly used to facilitate breathing and comfort.

Tachycardia is a medical term used to describe an abnormally fast heart rate, typically exceeding 100 beats per minute in adults.

Washing hands for at least 20 seconds with soap and water is essential for proper infection control in healthcare settings.

Blood pressure is measured using a sphygmomanometer and a stethoscope or an automatic blood pressure monitor.

Cyanosis is a medical condition in which the skin appears blue due to a lack of oxygen in the blood.