Active clinical trials for "Pneumoperitoneum"

Optimizing all factors that increase the intra-abdominal volume and performing an individualized strategy should allow us to reduce the pneumoperitoneum insufflation pressure while maintaining optimal surgery conditions for a laparoscopic colorectal surgery, compared to the standard strategy of maintaining fixed intra-abdominal insufflation pressures (12-15 mmHg).

The investigators hypothesized that the pneumoperitoneum with reverse Trendelenburg position could alter the rSO2 and early postoperative cognitive function.

The aim of this study is to observe the cardiovascular effects of the degree of head-down angle and pneumoperitoneum during laparoscopic procedure using by the fourth version Vigileo-Flotrac system.

The investigators want to test the hypothesis that the addition of a recruitment manoeuvre to a low pressure pneumoperitoneum will lead to an additional reduction in postoperative pain. Therefore the investigators will conduct a prospective randomized controlled, single blind trial.

Dynamic preload variables like pulse-pressure and stroke volume variation may be used to predict fluid responsiveness in patients during controlled ventilation. Previous work has shown that a rapid decrease in intra-abdominal pressure may lead to an increase in dynamic preload parameters, suggestive of a fluid deficit - despite fluid status had not changed [van Lavieren M 2014]. The results of this study are limited by the fact that a non-invasive and uncalibrated hemodynamic monitoring system (Nexfin™) was used. The present study thus aims to evaluate the effects of abdominal pressure changes on dynamic preload parameters (PPV and SVV) employing conventional, invasive hemodynamic monitoring (Vigileo®, Edwards Lifescience) in open abdominal surgery as well as in minimal invasive surgical procedures with pneumoperitoneum.

The negative effects of pneumoperitoneum used in laparoscopic cholecystectomy on cerebral metabolism, intracranial pressure, cardiovascular (blood pressure, heart rate, venous return) and respiratory system are known. Pneumoperitoneum formed with low (10 - 12 mmHg) intraabdominal pressure causes less fluctuations in hemodynamic and respiratory changes. Previous studies have shown that intraabdominal pressure increase is effective on cerebral metabolism, leading to increased intracranial pressure. The aim of this study is to investigate the hemodynamic effects of two different pneumoperitoneum pressure ranges (10-12 mmHg and 13-15 mmHg) on cerebral oxygenation with using Near Infrared Spectroscopy (NIRS), which is is a non-invasive technique, in laparoscopic cholecystectomy surgeries.

This study targets patients undergoing laparoscopic gastric cancer surgery. The investigators would like to compare two factors that influence intracranial pressure through optic nerve sheath diameter measurement. First factor is intraperitoneal pressure. Second factor is epidural pressure. The investigators divided the patients into three groups. Group A is patients with laparoscopic gastric surgery who received epidural injection through an thoracic epidural catheter. Group B is patients with laparoscopic gastric surgery who don't received epidural injection through an thoracic epidural catheter. Group C is patients with open gastric surgery.

The purpose of this study is to evaluate whether the change of stroke volume index(△SVI) induced by the rapid mini-fluid administration can predict fluid responsiveness in patients with pneumoperitoneum

This study is an observational study measuring the esophageal pressure in anesthetized surgical patient undergoing changes in posture and pneumoperitoneum

Perioperative airway resistance and lung function are evaluated perioperatively in patients, who undergo surgical procedures in different postures and with or without gas insufflation into the peritoneal cavity.