A nurse is preparing to administer oxygen to a client. Which action does the nurse use to follow safe technique when using a portable oxygen cylinder?

Metered-dose inhalers (MDIs) are pressurized canisters that deliver a precise dose of aerosolized medication directly to the lower respiratory tract. The efficacy of the therapy depends on the deposition of the drug into the bronchioles rather than the oropharyngeal cavity. Proper coordination of actuation and inhalation ensures that the medication bypasses the upper airway and reaches the targeted receptors for maximum therapeutic effect.

Rationale for correct answer

3. Holding the breath for 5 to 10 seconds allows the medication particles to settle onto the respiratory mucosa through sedimentation. This pause prevents the immediate exhalation of the drug and ensures the active ingredients reach the smaller airways. It is a critical step for maximizing drug absorption.

Rationale for incorrect answers

1. The client must breathe in through the mouth to ensure a direct and unobstructed path for the aerosol to enter the trachea. Breathing through the nose acts as a filter and traps the majority of the medication in the nasal passages. Mouth breathing is essential for lower airway delivery.

2. Patients should only inhale one spray per breath to ensure the medication is properly distributed and the dosage is accurate. Inhaling two sprays simultaneously increases the likelihood of the drug hitting the back of the throat and being swallowed. Most prescriptions specify a waiting period of 1 minute between puffs.

4. Exhaling quickly prevents the medication from reaching the distal alveoli and staying there long enough to work. The correct technique involves a slow, controlled exhalation through pursed lips after the breath-hold. Quick exhalation significantly reduces the amount of medication that remains in the lungs.

Test-taking strategy

• Visualize the goal: The goal of an inhaler is to get medicine down deep and make it stay there.
• Evaluate the options for “deep” and “stay”:
  • Rule out 1 (Nose) because it filters out the medicine.
  • Rule out 4 (Quick exhale) because it blows the medicine back out.
  • Rule out 2 (Two sprays) because it causes “clumping” in the throat.
• Select the most logical retention method: Holding the breath (Option 3) is the only action listed that helps the medicine stay in the lungs to be absorbed.
• Focus on timing: The 5 to 10 second hold is a classic educational benchmark for MDI training.

Take home points

• Using a spacer or holding chamber can significantly improve the delivery of medication to the lungs for patients with poor coordination.
• Patients should wait 1 to 2 minutes between puffs of the same medication to allow the first dose to begin bronchodilation.

Pneumonia causes an inflammatory exudate to accumulate within the alveoli, impairing gas exchange and increasing the viscosity of respiratory secretions. When a patient is in a supine position, the weight of the abdominal contents and the effects of gravity reduce diaphragmatic excursion and promote the pooling of secretions in the dependent lung segments. Positioning the patient is the most rapid non-invasive intervention to optimize lung expansion and facilitate the mechanical clearance of the airway.

Rationale for correct answer

2. Elevating the head of the bed to 45 degrees (Fowler's position) uses gravity to shift the diaphragm downward, allowing for maximal thoracic expansion. This position decreases the work of breathing and helps the patient utilize their cough more effectively to mobilize secretions. It is the immediate action in the nursing process to improve respiratory status.

Rationale for incorrect answers

1. While oxygen therapy may be necessary, it does not address the mechanical problem of secretions blocking the airway. Oxygen should be administered after the patient's position has been optimized and the airway has been assessed for patency. Proper positioning may even reduce the immediate need for supplemental oxygen by improving ventilation.

3. An incentive spirometer is a tool for preventing atelectasis but is not the priority for a patient currently struggling to clear active secretions. The patient must first be repositioned and stabilized before they can effectively perform the slow, deep inspirations required for spirometry. It is a secondary, preventive intervention.

4. Notifying the healthcare provider is appropriate if the patient's condition does not improve, but the nurse must first perform nursing interventions to stabilize the patient. Calling the doctor before attempting to reposition the patient is a failure of independent nursing judgment in an acute situation. Initial stabilization is always the nurse's priority.

Test-taking strategy

• Identify the least invasive first: In respiratory distress, positioning is almost always the first and fastest action the nurse can take independently.
• Apply the nursing process: Before calling for help or starting medications, the nurse should optimize the patient's anatomical ability to breathe.
• Evaluate the priority:
  • Rule out 4 because you must act before you call.
  • Rule out 3 because it's for prevention, not acute distress.
  • Rule out 1 because airway and positioning come before oxygenation (ABC).
• Focus on gravity: Elevating the head of the bed is the gold standard first step for any patient who is coughing or short of breath.

Take home points

• High Fowler's position (60 to 90 degrees) provides the greatest decrease in abdominal pressure on the diaphragm.
• Frequent position changes help prevent the pooling of secretions and the development of hypostatic pneumonia.