Understanding surgical smoke in laparoscopy through Lagrangian Coherent Structures

Area of Science:

• Fluid Dynamics
• Surgical Technology

Background:

• Surgical smoke generated during laparoscopic surgery contains hazardous particles.
• Effective elimination of surgical smoke is crucial for patient and staff safety.

Purpose of the Study:

• To analyze the fluid dynamics within an insufflated abdomen to understand surgical smoke behavior.
• To identify patterns responsible for particle transport, mixing, and accumulation.

Main Methods:

• Utilized computational fluid dynamics (CFD) to model the velocity field.
• Calculated flow rates for various outlet configurations.
• Computed Finite Time Lyapunov Exponent (FTLE) fields to identify Lagrangian Coherent Structures (LCSs).

Main Results:

• Material curves, indicative of particle pathways, are influenced by outlet angle, position, number, and inlet parameters.
• FTLE field ridges highlight vortex formation regions and areas of maximum particle accumulation.
• Demonstrated a dependency of LCSs on surgical setup geometry.

Conclusions:

• Understanding FTLE fields and LCSs provides insights into surgical smoke dynamics.
• This knowledge can inform the strategic placement of instruments for efficient surgical smoke evacuation.
• Optimizing instrument placement based on flow dynamics can enhance operating room safety.