Toward photorealism in endoscopic sinus surgery simulation.

Area of Science:

• Medical Simulation
• Surgical Training Technologies
• Virtual Reality in Medicine

Background:

• Endoscopic sinus surgery (ESS) is the standard treatment for chronic rhinosinusitis and nasal polyposis.
• ESS has a reported complication rate of 5-10%.
• Simulation is advocated to improve surgical training and reduce medical errors.

Purpose of the Study:

• To develop a virtual reality (VR) endoscopic sinus surgery (ESS) simulator.
• To achieve photorealism and surgical verisimilitude in the VR simulator.
• To create a risk-free training environment for ESS trainees.

Main Methods:

• 3D mesh models were created from sinus CT scans and incorporated into a deformable spring-damper model.
• Dual haptic devices simulated endoscopes and surgical instruments, providing tactile feedback.
• Textures, lighting effects, and physiological responses (e.g., vasoconstriction) were added for realism.

Main Results:

• The simulator provides a photorealistic, moist, and glossy endoscopic view of the sinuses.
• Interactive tissue simulation with accurate haptic feedback allows for cutting and removal.
• A working prototype demonstrates a realistic visual and haptic user experience.

Conclusions:

• The VR ESS simulator offers a risk-free environment for surgical trainees to practice and develop core skills.
• Customized haptic devices provide precise force feedback, mimicking actual surgical movements.
• This training tool is anticipated to enhance learning, retention, and recall of ESS procedures.