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On Lagrangian Coherent Structures in Laparoscopy

Sandeep KumarCaroline CrowleyMohammad Faraz KhanMiguel D. BustamanteRonan CahillKevin Nolan
Dec 2022
摘要
Laparoscopy is an electrosurgical medical operation often involving anapplication of high-frequency alternating current to remove undesiredbiological tissue from the insufflated abdomen accessible through inlet andoutlets trocars. One of the main byproducts in this process are the gaseousparticles, called surgical smoke, which is found hazardous for both the patientand the operating room staff. The elimination of this hazardous material is anarea of active research in the medical community. Thus, understanding dynamicsinfluenced by the underlying flow inside the abdomen is crucial. In thisarticle, we propose a computational fluid dynamics model and analyse thevelocity field in an insufflated abdomen shaped domain by identifying theLagrangian Coherent Structures (LCS) that are responsible for thetransportation, mixing and accumulation of the material particles in the flow.By calculating the mixing strength we show that the regions revealed by thesematerial curves are dependent on the angle, positions and number of the outletsand inlets. Hence, a novel utility of LCS in medical surgery is presented thatcan detail the dynamics of surgical smoke informing better design of effectivesmoke removal technologies.
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