Final answer:
PA catheterization is contraindicated in certain situations, such as severe bleeding disorders, infection at the insertion site, and severe right-sided heart failure.
Step-by-step explanation:
PA catheterization, also known as pulmonary artery catheterization, is an invasive procedure used to measure various pressures in the heart and lungs. While it provides valuable information, there are certain situations where it is contraindicated, meaning it should not be performed. Some contraindications include severe bleeding disorders, infection at the insertion site, and severe right-sided heart failure.