1. The Effect of CO2 Pressure and Flow Variation on Carbon Particles Spread During Pneumoperitoneum: An Experimental Study
- Author
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Alberto Breda, Elisa De Lorenzis, Andrea Gallioli, M. Fontana, Lorenzo Colombo, E. Lievore, Emanuele Montanari, Giancarlo Albo, and Luca Boeri
- Subjects
Potential risk ,business.industry ,Continuous flow ,Urology ,Pulsatile flow ,Abdominal cavity ,medicine.disease ,Carbon particle ,medicine.anatomical_structure ,Flow (mathematics) ,Pneumoperitoneum ,Hounsfield scale ,medicine ,business ,Biomedical engineering - Abstract
BACKGROUND A correlation between atypical recurrences and minimally-invasive surgery has been suggested in case of urothelial cancer; however, very few data are available on the role of pneumo peritoneum in terms of gas flow and intra-abdominal pressure. The objective of the study is to analyze the impact of CO2 pneumoperitoneum variation on an inert material as surrogate of neoplastic cells. MATERIAL AND METHODS We designed an experimental model mimicking pneumoperitoneum in three settings: sealed flow (no leakage), pulsatile flow (alternating efflux and influx) and continuous flow (AirSeal® insufflator). Each experiment was characterized by a pre-determined gas flow and pressure, trocar distance and position from the particles. Hounsfield density (HD) variation in the areas of interest was measured as index of graphite powder dispersion. A Linear regression model was employed to measure the correlation between modifiable variables and HD. RESULTS HD was lower in the pulsatile compared to both the sealed and continuous flows (p 0.05). CONCLUSIONS Flow and pressure setting, in-flow trocar distance and contiguity from the tumor, and pneumoperitoneum stability may be all crucial component in minimally invasive surgery. In vivo, these variables should be considered as potential risk factors for tumor cells spread within the abdominal cavity.
- Published
- 2022
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