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Development of an ultrasonically activated trocar system.
D Gossot1, P Validire, S Matsumoto
1Institut Mutualiste Montsouris, 42 Bd Jourdan, F-75014 Paris, France.
Surgical Endoscopy
|April 19, 2002
Summary
Ultrasonically activated trocars significantly reduce insertion time and force compared to conventional trocars. This novel technology may enhance laparoscopic surgery safety by minimizing visceral and vascular injury risks.
Area of Science:
- Minimally Invasive Surgery
- Surgical Instrumentation
- Biomedical Engineering
Background:
- Conventional laparoscopic trocar insertion carries risks of visceral and vascular injuries due to high puncture forces.
- Minimizing these forces is critical for improving patient safety during laparoscopic procedures.
Purpose of the Study:
- To evaluate a novel ultrasonically activated trocar in an animal model.
- To compare the insertion force, time, and abdominal pressure increase between conventional and ultrasonically activated trocars.
Main Methods:
- 40 punctures were performed in four pigs using conventional (CT) and ultrasonically activated (UT) 11-mm trocars.
- Insertion force, abdominal pressure increase, and penetration time were measured using a push-pull gauge and computer.
- Laparoscopic control was maintained throughout the insertion process.
Main Results:
- Ultrasonically activated trocars required significantly less time (4.5s vs 12.8s) and force (0.4 kgF vs 6.8 kgF) for insertion (p < 0.001).
- Abdominal pressure increase was markedly lower with UT (0.8 mmHg vs 7.6 mmHg) (p < 0.001).
- No significant pathological differences or necrosis were observed between groups at 30 days.
Conclusions:
- Ultrasonically activated trocars demonstrate superior performance in terms of reduced insertion time and force.
- This technology represents a potential advancement in enhancing the safety of trocar insertion in laparoscopic surgery.