Final answer:
The Swan-Ganz catheter is positioned in the right pulmonary artery and is used to measure pulmonary artery pressures. The correct sequence of blood flow from the heart to the body is arteries, capillaries, venules, veins, and aorta. Additionally, blood in the pulmonary vein is oxygenated, while blood in the pulmonary artery and the inferior vena cava is deoxygenated.
Step-by-step explanation:
A Swan-Ganz catheter is designed to sit in the pulmonary artery for the purpose of measuring pulmonary artery pressures, including the pulmonary capillary wedge pressure. It is typically inserted through a central vein (like the internal jugular or subclavian vein) and then advanced into the right atrium, right ventricle, and finally into the pulmonary artery. Among the options provided, the correct location for where a Swan-Ganz catheter sits would be:
C. Right pulmonary artery
As for the sequence of blood flow from the heart out to the body and back again, the correct order is:
- arteries
- capillaries
- venules
- veins
- aorta
When it comes to oxygenation levels in the blood:
- The blood in the pulmonary vein is oxygenated.
- Blood in the inferior vena cava is deoxygenated.
- Blood in the pulmonary artery is deoxygenated.
- Blood in the aorta is oxygenated.