Diaphragmatic pacing in infants: techniques and results

Area of Science:

• Pediatric Surgery
• Respiratory Medicine
• Biomedical Engineering

Background:

• Central hypoventilation syndrome (CHS) impairs the body's ability to regulate breathing.
• Positive-pressure ventilation is a common but burdensome treatment for CHS in infants.
• Alternative ventilatory support methods are needed for CHS patients.

Purpose of the Study:

• To evaluate the safety and efficacy of phrenic nerve pacing in infants with CHS.
• To assess the feasibility of diaphragmatic pacing through preoperative nerve conduction studies.
• To determine if phrenic nerve pacing can replace or reduce positive-pressure ventilation.

Main Methods:

• Phrenic nerve pacing was performed in 8 infants (2.5–8.5 months old) diagnosed with CHS.
• Preoperative assessments included evaluating ventilatory response to hypercapnia/hypoxia and percutaneous nerve conduction studies.
• Surgical implantation involved anterolateral thoracotomy for electrode placement around the phrenic nerve and receiver implantation.

Main Results:

• All 8 infants underwent successful phrenic nerve pacing.
• No procedure-related complications or deaths occurred during follow-up (6 months to 8 years).
• Bilateral phrenic nerve stimulation significantly reduced or eliminated the need for positive-pressure ventilation in all patients.

Conclusions:

• Phrenic nerve pacing is a safe and feasible procedure in infants with CHS.
• This technique provides an effective alternative to positive-pressure ventilation.
• Diaphragmatic pacing offers a promising solution for CHS management, avoiding ventilation drawbacks.