While suctioning the ET tube of a spontaneously breathing patient, the nurse notes that the patient develops bradycardia with premature ventricular contractions. What should the nurse do first?

During endotracheal suctioning, a patient may develop bradycardia with premature ventricular contractions (PVCs) due to vagal stimulation and transient hypoxia. The priority intervention is to stop suctioning immediately and reoxygenate the patient with 100% oxygen using a bag-valve-mask (BVM) until the heart rate stabilizes and oxygenation improves.

Rationale for Correct Answer

4. Stop suctioning and ventilate the patient with a BVM device with 100% oxygen until the heart rate returns to baseline: This response directly addresses the cause of the bradycardia and PVCs—hypoxia and vagal stimulation. Providing 100% oxygen restores oxygen saturation, reverses vagal-induced bradycardia, and prevents further dysrhythmias. Reoxygenation before and after suctioning is essential for patient safety.

Rationale for Incorrect Answers

1. Stop the suctioning and assess the patient for spontaneous respirations: Although assessment is important, the priority is to restore oxygenation immediately rather than simply observe the patient.
2. Attempt to resuction the patient with reduced suction pressure and pass time: Resuctioning at this point would worsen hypoxia and bradycardia. Suctioning should be resumed only after stabilization and reoxygenation.
3. Stop the suctioning and ventilate the patient with slow, small-volume breaths using a BVM device: Ventilating with small-volume breaths does not ensure adequate reoxygenation. The patient needs 100% oxygen to rapidly reverse the hypoxic state.

Take-Home Points

• Bradycardia and PVCs during suctioning indicate vagal stimulation and hypoxia.
• Immediately stop suctioning and administer 100% oxygen with a BVM until stability returns.
• Always preoxygenate for 30 seconds before suctioning and reoxygenate afterward.
• Continuous cardiac and oxygen monitoring is crucial during suctioning of intubated patients.

Positive end-expiratory pressure (PEEP) improves oxygenation by preventing alveolar collapse, but excessive PEEP increases intrathoracic pressure, which can impair venous return and reduce cardiac output. The earliest and most significant sign of this hemodynamic effect is decreased blood pressure.

Rationale for Correct Answer

1. Decreased blood pressure: Elevated intrathoracic pressure from high PEEP reduces venous return to the heart, lowering cardiac output and causing hypotension. This is an important early indicator of PEEP-induced hemodynamic compromise that requires prompt assessment and adjustment of ventilator settings.

Rationale for Incorrect Answers

2. Decreased PaO₂: PEEP is designed to improve oxygenation; a decrease in PaO₂ usually indicates a problem with lung compliance, secretions, or oxygen delivery, not direct hemodynamic compromise from PEEP.

3. Increased crackles: Crackles suggest pulmonary edema or fluid overload, which is not an immediate or reliable indicator of high PEEP effects.

4. Decreased spontaneous respirations: In ACV, the ventilator delivers full breaths; spontaneous respirations are minimal or absent and do not indicate PEEP-related hemodynamic compromise.

Take-Home Points

• High PEEP increases intrathoracic pressure, which can decrease venous return and cardiac output, causing hypotension.
• Monitor blood pressure and assess for signs of hemodynamic instability during PEEP therapy.
• Adjust PEEP carefully to balance oxygenation benefits with cardiovascular effects.