<b>Laparoscopically instilled fluid: the rate of absorption and the effects on patient discomfort and fluid balance</b>

Abstract

The aim of the study was to assess the length of time laparoscopically instilled fluid remains in the peritoneal cavity and to assess its effects on patient discomfort and fluid balance. The setting was a London teaching hospital, and randomized controlled design was used. A total of 24 women undergoing laparoscopic surgery were randomized, one group ( n = 12) received 1 l of normal saline instilled into the pouch of Douglas at the end of surgery, and the other ( n = 12) acted as controls. A vacuum drain was left clamped at the end of surgery and was released after 2, 4, 8, or 16 h to determine the rate of fluid absorption. Overall fluid balance and analgesic requirements were assessed along with the subjective symptoms of thirst and pain. All of the fluid was absorbed after approximately 16 h. The control group passed significantly less urine ( P = 0.046) despite having a similar fluid intake. The experimental group required significantly less intramuscular analgesia ( P = 0.040) and required shorter hospitalization ( P = 0.029) than the control group. Differences in thirst and pain scores did not reach statistical significance. Intraperitoneal fluid appears to decrease postoperative discomfort and can act as a source of postoperative rehydration.