Intraabdominal humidity and electromyographic activity of the gastrointestinal tract

Abstract

The purpose of this study was to observe electromyographic activity of stomach, small bowel, and colon during and early after identical laparoscopic and conventional operations to compare the operative trauma. In nine dogs a cholecystectomy was performed laparoscopically (n = 5) or by laparotomy (n = 4). Analysis of electromyographic activity focused on rhythm, frequency, and amplitudes of slow waves. Furthermore, oxygenation of blood and tissue, intestinal impedance, intraabdominal humidity, and temperature were documented to investigate their influence on slow waves. Open cholecystectomy caused an evident decrease of frequency and amplitude of colonic slow waves in comparison to laparoscopic cholecystectomy. Arrhythmic slow waves were observed only in the stomach during conventional cholecystectomy. Stomach and small intestine showed no significant difference of frequency and amplitude of slow waves in both operation groups. Intraabdominal humidity and intestinal impedance differed significantly in laparoscopy and laparotomy. Laparoscopic cholecystectomy proceeded with a minor abdominal trauma documented by smaller alterations of slow waves. This may be caused by reduced peritoneal desiccation.

Absence of intestinal inflammation and postoperative ileus in a mouse model of laparoscopic surgery

“…Our findings are consistent with previous results showing that following laparoscopic cholecystectomy in dogs, the reduction in intestinal motility is less in comparison with open cholecystectomy . According to the authors, this difference resulted from the lower extent of abdominal trauma associated with the laparoscopic technique.…”

Humidified gas prevents hypothermia induced by laparoscopic insufflation

“…6. The intra-abdominal CO 2 during laparoscopic surgery is at body temperature and nearly 100% saturated with body water [2,8,28]. 7.…”

Laparoscopy versus Laparotomy:Compari son of Adhesion-Formation after Bowel Resection in a Canine Model

“…Furthermore, laparoscopic handling of the gut constitutes a less severe trauma for the visceral peritoneum than manual handling during open surgery. Desiccation of the gut, another cause of peritoneal damage, is reduced by laparoscopic surgery [10]. …”