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The "Bernese" frameless optical computer aided surgery system.

M Caversaccio¹, R Bächler, K Lädrach

¹Department of Otorhinolaryngology, Head and Neck Surgery, University of Bern, Bern, Switzerland.

Computer Aided Surgery : Official Journal of the International Society for Computer Aided Surgery

|January 13, 2000

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This study shows a frameless Computer Aided Surgery system is accurate and usable for skull base surgeries. The navigation system enhances surgical safety through real-time anatomical identification.

Area of Science:

Neurosurgery
Medical Technology

Background:

Frameless Computer Aided Surgery (CAS) systems offer potential benefits in neurosurgical procedures.
Accurate intraoperative navigation is crucial for complex skull base surgeries.

Purpose of the Study:

To evaluate the clinical experience and performance of a novel frameless CAS system.
To assess the accuracy and usability of the system in a clinical setting.

Main Methods:

The system utilizes preoperative CT scans and intraoperative optical tracking for navigation.
Landmark and surface-based registration correlate skull anatomy to CT images.
Real-time 3D visualization of instruments and endoscopic views are provided.

Main Results:

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109 computer-aided interventions were successfully performed over two years.

Procedures included anterior skull base, paranasal sinuses, and lateral skull base surgeries.

Clinical accuracy ranged from 0.5 mm to 2 mm with no complications.

Conclusions:

The frameless CAS system demonstrates proven accuracy and usability.
The system enhances surgical safety by providing clear identification of anatomical structures.
Surgeons reported high comfort levels and increased confidence during procedures.