Sequence and task analysis of instrument use in common laparoscopic procedures

Area of Science:

• Surgical technology
• Minimally invasive surgery
• Instrument design

Background:

• Objective assessment of instrument maneuver and exchange dynamics is crucial for improving surgical instrument design.
• Understanding instrument dynamics can lead to enhanced performance and efficiency in laparoscopic procedures.

Purpose of the Study:

• To objectively assess the dynamics of instrument maneuver and exchange in laparoscopic surgery.
• To identify multifunctional instruments and common instrument exchange patterns.
• To provide data for improved surgical instrument design.

Main Methods:

• Time motion analysis of 29 videotaped laparoscopic procedures.
• Determination of instrument multifunctionality using a standardized list of laparoscopic maneuvers.
• Utilization of state transition diagrams to document instrument exchange sequences.

Main Results:

• The curved dissector, atraumatic grasper, and cautery scissors were identified as the most multifunctional instruments, each performing five distinct maneuvers.
• Common instrument exchange patterns include a three-part dissect --> clip --> cut cycle and a two-part dissect --> suction cycle.

Conclusions:

• Laparoscopic instruments frequently perform multiple maneuvers beyond their primary function.
• Identified common patterns in instrument exchange offer potential design parameters for enhancing surgical efficiency.