Elements of virtual temporal bone surgery: Manipulandum format may be more important to surgeons than haptic device...

Area of Science:

• Neurosurgery
• Medical Simulation
• Haptics Technology

Background:

• Virtual temporal bone simulations often lack realistic drill-bone interaction.
• Haptic device and manipulandum fidelity influence perceived realism in virtual surgery.
• This study evaluates the impact of hardware upgrades on surgical simulation realism.

Purpose of the Study:

• To assess the effect of haptic device and manipulandum fidelity on the realism of virtual temporal bone drilling.
• To compare a 3-degrees of freedom (DOF) haptic device with a 6-DOF device using standard and modified manipulandums.
• To determine which hardware component contributes more to the perceived realism of the simulation.

Main Methods:

• Six otologic surgeons performed virtual mastoidectomies using different haptic hardware setups.
• A 6-DOF HD² haptic device was tested with both a standard and a modified otic drill manipulandum.
• Surgeons' perceptions of realism were collected and analyzed using statistical tests.

Main Results:

• The modified HD² manipulandum was significantly favored for acoustic properties and overall bone similarity.
• No significant preference was found for increased haptic device fidelity.
• Users preferred the modified manipulandum for osseous feel, vibration, overall realism, education, and rehearsal.

Conclusions:

• Enhancing manipulandum realism is crucial for improving virtual surgical simulation.
• Increased haptic device fidelity alone does not proportionally increase perceived realism.
• There may be a limit to the fidelity achievable in current virtual haptic drill-bone interactions.