Comparison of Thoracic and Abdominal Cavity Volumes During Abdominal CO₂ Insufflation and Abdominal Wall Lift

Abstract

Abdominal CO2 insufflation results in decreased thoracic volume when compared with baseline. AWL preserved thoracic volume similar to baseline. Abdominal volumes achieved with abdominal CO2 insufflation are significantly greater than those attained with AWL.

Comparison of Pneumoperitoneum Volumes in Lift Laparoscopy With Variable Lift Locations and Tensile Forces

“…Pneumoperitoneum volumes or working distances generated during laparoscopy, regardless of the method, are not widely reported. Watkins et al 15 used computed tomography to manually assess thoracic and abdominal volumes created by positive pressure insufflation as well as mechanical lift in dogs. Vlot et al [25][26][27][28][29][30][31][32][33][34][35][36][37] reported pneumoperitoneum volume measurements using CT scans in porcine models, similar to that presented here.…”

“…Pneumoperitoneum volumes have previously been compared between peritoneal lift and CO 2 insufflation . However, the optimal lift location and lift tension have not been defined.…”

“…7 Similar effects of CO 2 have been reported in people, especially in children and elderly people. [9][10][11][12][13][14] Positive pressure pneumoperitoneum created by insufflation at 12 mmHg decreases thoracic volume by 14% 15 and causes cardiovascular depression, increased peripheral resistance, and increased minute ventilation in dogs. [16][17][18][19] Increases in cardiac work and stress indicators in response to positive pressure pneumoperitoneum compared to abdominal wall lifting have been demonstrated in people.…”

“…26 Veterinary studies have demonstrated the feasibility of lift laparoscopy in clinical applications, 27 and an experimental study did not find any reduction in thoracic volume using a mechanical lift device, whereas positive pressure insufflation did reduce thoracic volume. 15 Pneumoperitoneum volumes have previously been compared between peritoneal lift and CO 2 insufflation. 15 However, the optimal lift location and lift tension have not been defined.…”

“…15 Pneumoperitoneum volumes have previously been compared between peritoneal lift and CO 2 insufflation. 15 However, the optimal lift location and lift tension have not been defined. This study evaluated the effects of lift location and tension on the resulting isobaric pneumoperitoneal volume.…”