Abstract
AbstractAbstract: Gas volume to intra-peritoneal pressure fuzzy modeling for evaluating pneumoperitoneum in videolaparoscopic surgery is proposed in this paper. The proposed approach innovates in using fuzzy logic and fuzzy set theory for evaluating the accuracy of the prognosis value in order to minimize or avoid iatrogenic injuries due to the blind needle puncture. In so doing, it demonstrates the feasibility of fuzzy analysis to contribute to medicine and health care. Fuzzy systems is employed here in synergy with artificial neural network based on backpropaga tion, multilayer perceptron architecture for building up numerical functions. Experimental data employed for analysis were collected in the accomplishment of the pneumoperitoneum in a random population of patients submitted to videolaparoscopic surgeries. Numerical results indicate that the proposed fuzzy mapping for describing the relation from the intra peritoneal pressure measures as function injected gas volumes succeeded in determinining a fuzzy model for this nonlinear system when compared to the statistical model.
Highlights
IN the last twenty years the minimaly invasive surgery has become the main access to a great number of surgeries. known as videolaparoscopic surgery, it presents diverse advantages upon the tradicional open surgery approach such as minor pain intensity, quicker recovery, reduced cost, only to mention few
The videolaparocopic surgery first requires a pneumoperitoneum that is an intra-abdominal space obtained through CO2 gas insuflation
In order to verify the best tuning of the T-S fuzzy model for achieving the intra-peritoneal pressure measure and the injected gas volume relationship, several simulations are per-formed
Summary
IN the last twenty years the minimaly invasive surgery has become the main access to a great number of surgeries. known as videolaparoscopic surgery, it presents diverse advantages upon the tradicional open surgery approach such as minor pain intensity, quicker recovery, reduced cost, only to mention few. The videolaparocopic surgery first requires a pneumoperitoneum that is an intra-abdominal space obtained through CO2 gas insuflation. This procedure is achieved in two steps: the access to the perineal cavity and the gas insuflation. The most employed technique to gain access to the peritoneal cavity in order to produce pneumoperitoneum is by using Veress needle puncture [1]. Injuries to the great vessels or intesti-nal loops can occur when a Veress needle is blindly inserted by surgeons into the abdomen for peritoneal insufflation (Fig 1 ). Vascular and inadvertent visceral injuries are, the most common cause of death in videolaparoscopic procedures, respectively, achieving 15-25% and 25% of mortality [3], [4]
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