Final answer:
Imaging techniques such as X-ray or fluoroscopy can determine the placement of a catheter in Zone I or II.
Step-by-step explanation:
Knowing whether a catheter is in Zone I or II can be determined by using imaging techniques such as X-ray or fluoroscopy. These imaging techniques allow the healthcare provider to visualize the placement of the catheter and determine if it is in the correct location. For example, in the case of a central venous catheter, if the tip of the catheter is in the superior vena cava or right atrium, it is considered to be in Zone I. If the tip of the catheter is in the right ventricle or pulmonary artery, it is considered to be in Zone II.