Spinal neurosurgery with the head-mounted "Varioscope" microscope.

Area of Science:

• Neurosurgery
• Surgical Technology
• Medical Devices

Background:

• Intra-operative visualization is critical in spinal neurosurgery.
• Traditional operating microscopes offer high magnification but lack portability.
• Head-mounted microscopes present a potential alternative for enhanced surgical visualization.

Purpose of the Study:

• To report preliminary findings on the intra-operative use of the Varioscope head-mounted microscope in spinal neurosurgery.
• To evaluate the Varioscope's technical specifications and performance in a clinical setting.
• To assess the suitability of the Varioscope for various spinal surgical approaches.

Main Methods:

• The Varioscope (Leica HM500), a 297g head-mounted microscope with variable magnification (3.6x-7.2x) and working distance (300-600mm), was used intra-operatively.
• The device features zoom and focus functions, including autofocus.
• Performance was evaluated in spinal neurosurgical procedures, noting its utility in larger fields and limitations in deep keyhole approaches.

Main Results:

• The Varioscope provides a variable magnification range and a usable working distance.
• Autofocus functionality performed well in larger operative fields but was less effective in deep structures typical of keyhole surgery.
• The built-in video camera facilitated real-time monitoring for educational purposes.

Conclusions:

• The Varioscope is a recommended portable option for spinal neurosurgery, particularly when stationary microscopes are inaccessible.
• Its portability allows for use across different hospital locations.
• While offering educational benefits via video output, fixed microscopes were preferred for routine microsurgery.