Identifying Stimulation Lead Malfunction After Hypoglossal Nerve Stimulation Implantion.

This case series describes four obstructive sleep apnea patients who underwent hypoglossal nerve stimulation implant surgery. After a period of OSA resolution with therapy, these patients presented with symptoms of increased snoring and reduced tongue sensation with implant activation. Impedance testing showed abnormally elevated values on bipolar electrode settings, and electrode reprogramming led to restored therapeutic benefit.