Final answer:
The most important consideration when using a nasal cannula is to ensure a snug fit to prevent air leakage, delivering the prescribed oxygen concentration effectively. High-flow rates should be avoided in chronic lung disease patients to prevent disrupting their unique respiratory drive.
Step-by-step explanation:
When using a nasal cannula for oxygen delivery, it is imperative not to use a high-flow rate unless specifically indicated, as it can be detrimental, particularly in clients with chronic lung disease. For chronic lung disease patients, maintaining a lower oxygen flow rate is crucial because their bodies may have adapted to higher levels of carbon dioxide, and too much oxygen can suppress their drive to breathe. Therefore, the most important thing to remember is to ensure a snug fit to prevent air leakage (Option B), as this helps deliver the prescribed oxygen concentration effectively and efficiently without over-oxygenating the patient.
A pulse oximeter is used to measure the oxygen level in the blood to ensure the respiratory system, including the bronchial tubes, bronchioles, and alveoli, is performing its function of gas exchange effectively. This is vital for patients with clogged airways or hypoxic conditions. Adequate oxygen level is essential for bodily functions, and a proper fit of the nasal cannula helps ensure that the patient is receiving the right amount of oxygen.