A patient on a mechanical ventilator has a low-pressure alarm. Oxygen saturation is falling and respiratory rate support is not being maintained. Initial assessment shows no blockage, no tubing kinking, and all connections are proper. What should the nurse do first?

1. A

   Disconnect the patient from the ventilator and ventilate with a bag-mask device

2. B

   Increase the tidal volume and fraction of inspired oxygen

3. C

   Perform endotracheal suctioning

4. D

   Continue ventilation and observe

Appeared in: NORCET-11 Mains

Explanation

• A low-pressure alarm indicates a loss of airway pressure, often due to a leak, disconnection, or machine malfunction.
• When the patient is unstable and the cause of the alarm is not immediately obvious or fixable, the ventilator must be bypassed.
• Manual ventilation with a bag-valve-mask (BVM) device provides immediate, reliable oxygenation and ventilation.
• Prioritizing the patient's physiological needs over troubleshooting the equipment prevents severe hypoxia and cardiac arrest.

Why Other Options Were Wrong

• Option B: Adjusting ventilator settings will not resolve the issue if there is a mechanical failure or an undetected leak causing the low-pressure alarm.
• Option C: Suctioning is indicated for clearing secretions, which cause increased airway resistance and trigger high-pressure alarms, not low-pressure alarms.
• Option D: The patient is actively deteriorating with falling oxygen saturation; passive observation will lead to severe hypoxia and potential death.

Related Visual

Clinical Relevance

• Nursing practice connection: Knowing Troubleshooting mechanical ventilator alarms and emergency management of hypoxia helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
• Always keep a manual resuscitation bag (bag-valve-mask) connected to an oxygen source at the bedside of any patient on mechanical ventilation.
• If a ventilator alarm sounds and the patient is in distress, the nurse must prioritize the patient over troubleshooting the machine.
• What if? If the low-pressure alarm sounded but the patient was stable and a disconnected tube was immediately found, the nurse should quickly reconnect the tubing rather than initiating manual ventilation.

How to Approach the Question

• Identify the alarm type: A low-pressure alarm means air is escaping or not reaching the patient (e.g., leak, disconnection, or machine failure).
• Assess the patient: The patient is unstable, evidenced by falling oxygen saturation and inadequate respiratory rate.
• Evaluate the equipment: The stem states connections are proper and there are no obvious issues, pointing toward a potential internal ventilator malfunction or hidden leak.
• Prioritize action: When a patient is unstable on a ventilator and the cause is not immediately fixable, always disconnect and manually ventilate with a BVM.

Concept Tested & Keywords

• Concept Tested: Troubleshooting mechanical ventilator alarms and emergency management of hypoxia
• Stem keywords: mechanical ventilator, low-pressure alarm, oxygen saturation falling, no blockage, connections proper
• Lead-in keywords: first
• Clinical cues: Falling oxygen saturation indicates acute respiratory compromise requiring immediate life-saving intervention.

Question ID

QO8dH33n7VpyLZ1c6Am9QL

Copy ID

Reference Book

E6 Nursing Fundamentals Potter Perry 12e Part 5 p. 1