Standard Pulsed Radiofrequency Versus Supervoltage Pulsed Radiofrequency Glossopharyngeal Nerve in Oropharyngeal Cancer Pain

Stimulation will be done using baylis generator both sensory at 50 HZ and 0.5-1.0 V (patient felt tingling at base of tongue, throat, ear and side of upper neck) and motor at 2 HZ and 1-2 V (contraction of stylopharyngeus muscle will be felt). After injecting 1 ml lidocaine 2% plus 1 ml (4 mg) Betamethasone (Diprofos) to augment analgesia and to lower impedance (usually it was 200-300 ohm due to bony proximity).Super voltage pulsed RF(60-75 volt according to patient tolerability will be done for 8 minutes with pulse width = 5 millisecond and pulse frequency of 2 HZ.

Stimulation will be done using baylis generator both sensory at 50 HZ and 0.5-1.0 V (patient felt tingling at base of tongue, throat, ear and side of upper neck) and motor at 2 HZ and 1-2 V (contraction of stylopharyngeus muscle will be felt). After injecting 1 ml lidocaine 2% plus 1 ml (4 mg) Betamethasone (Diprofos) to augment analgesia and to lower impedance (usually it was 200-300 ohm due to bony proximity).Super voltage8 pulsed RF will be done for 8 minutes with pulse width = 5 millisecond and pulse frequency of 2 HZ.