Transcranial Motor Evoked Potential Monitoring Using Propofol-Fentanyl Versus Desflurane-Dexmedetomidine Anesthesia...

Area of Science:

• Anesthesiology
• Neurosurgery
• Neurophysiology

Background:

• Spinal cord tumor resection necessitates intraoperative neuromonitoring.
• Transcranial electrical stimulation is used to record motor evoked potentials (MEPs).
• Comparing anesthetic regimens is crucial for optimizing patient outcomes.

Purpose of the Study:

• To compare the efficacy of propofol/fentanyl versus desflurane/dexmedetomidine anesthesia for recording MEPs during spinal cord tumor surgery.
• To evaluate intraoperative hemodynamics, recovery profiles, and postoperative analgesia between the two anesthetic groups.

Main Methods:

• A prospective, double-blinded, randomized controlled trial involving 50 adult patients undergoing spinal cord tumor resection.
• Patients were randomized to receive either propofol/fentanyl (Group P) or desflurane/dexmedetomidine (Group D) anesthesia.
• Transcranial electrical stimulation was used for monitoring MEPs with an amplitude of ≥50 µV.

Main Results:

• Successful MEP recording rates were similar between Group P (80%) and Group D (76%).
• Group D demonstrated significantly shorter times for spontaneous breathing, extubation, emergence, and discharge readiness.
• Postoperative Visual Analogue Scale pain scores were significantly lower in Group D at 12 and 24 hours.

Conclusions:

• Both desflurane-dexmedetomidine and propofol-fentanyl anesthesia allow for successful MEP monitoring in spinal cord tumor surgery.
• Desflurane-dexmedetomidine anesthesia is associated with improved recovery times and reduced postoperative pain compared to propofol-fentanyl.