Ultrasound-guided periventricular stereotaxis

Area of Science:

• Neurosurgery
• Medical Imaging
• Pain Management

Background:

• Intraoperative ultrasound is established for deep intracranial lesion biopsies.
• Its utility in functional neurosurgery, targeting normal echogenicity structures, is less clear.

Purpose of the Study:

• To evaluate the efficacy of intraoperative ultrasound for targeting periventricular gray matter in a canine model for functional neurosurgery.
• To assess the accuracy of electrode placement for intractable pain control.

Main Methods:

• A canine model was used to investigate periventricular gray matter targeting.
• Electrode placement accuracy was determined via post-mortem autopsy.
• Real-time ultrasound scanning was employed for guidance and hematoma monitoring.

Main Results:

• Four out of five electrode placements had an error of less than 1 mm.
• The fifth placement showed a 1.5-mm error, attributed to a technical issue (guide slippage).
• Ultrasound provided instant visual confirmation of electrode position and hematoma formation.

Conclusions:

• Intraoperative ultrasound is a viable tool for accurate electrode placement in functional neurosurgery.
• This technique offers potential advantages over conventional stereotaxis, including reduced invasiveness and improved safety.
• Real-time ultrasound guidance enhances surgical precision and allows for immediate complication detection.