Final answer:
Before applying elastic hose, it is important for the nurse to measure leg circumference for proper fitting, which aids blood circulation and prevents blood pooling.
Step-by-step explanation:
Before applying elastic hose, the nurse should measure leg circumference to ensure proper fitting of the hose. The use of elastic hosiery is to help blood circulation and prevent blood pooling in the legs, which can be critical for patients who are prone to swelling or at risk of venous disorders. Moreover, properly measuring and fitting the hose can help apply the right amount of pressure to assist the veins in sending blood back to the heart. Incorrect sizing could lead to ineffective compression or even restrict blood flow. In contrast, while ensuring the patient can breathe and checking for allergies are important for overall patient care, and consulting a physician is essential for treatment plans and interventions, these actions are not directly related to the application of compression hosiery.