Chest wall rigidity in two infants after low-dose fentanyl administration

Area of Science:

• Anesthesiology
• Pediatric Pharmacology
• Critical Care Medicine

Background:

• Fentanyl, a potent synthetic opioid, is widely used for analgesia and anesthesia.
• Skeletal muscle rigidity is a known, albeit rare, adverse effect of fentanyl and other synthetic opioids.
• This rigidity can affect respiratory muscles, leading to ventilation impairment, hypercarbia, and hypoxemia.

Observation:

• Two infants developed severe chest wall rigidity after receiving analgesic doses of fentanyl.
• The condition required intervention with neuromuscular blocking agents and mechanical ventilation.
• This adverse effect occurred despite the administration of low doses of fentanyl, particularly in young patients.

Findings:

• Chest wall rigidity is a rare but serious adverse effect of fentanyl, especially in neonates and infants.
• The risk is not limited to high doses; low doses can also precipitate this condition in susceptible pediatric populations.
• Prompt recognition and management, including neuromuscular blockade and ventilatory support, are crucial.

Implications:

• Clinicians should maintain a high index of suspicion for fentanyl-induced chest wall rigidity in infants and children.
• Understanding the pathophysiology is key to managing this rare complication effectively.
• This highlights the need for careful dosing and monitoring of fentanyl in pediatric patients, particularly neonates.