Impact of different intraoperative CO2 pressure levels (8 and 15 mmHg) during laparoscopic hysterectomy performed due to benign uterine pathologies on postoperative pain and arterial pCO2 : a prospective randomised controlled clinical trial

OBJECTIVE

To compare the effects of two different intraoperative CO₂ pressures (8 and 15 mmHg) during laparoscopic hysterectomy for benign uterine pathologies in terms of postoperative abdominal and shoulder pain, laparoscopy-mediated vegetative alterations, pain medication requirement, arterial CO₂ pressure (pCO₂ ), surgical parameters, and safety.

DESIGN

Prospective randomised controlled study.

SETTING

German university hospital.

POPULATION

Female patients undergoing laparoscopic hysterectomy for benign uterine pathologies.

METHODS

Patients were randomised to a standard pressure (SP; 15 mmHg, control) or low-pressure (LP; 8 mmHg, experimental) group.

MAIN OUTCOME MEASURES

Primary outcomes were postoperative abdominal and shoulder pain intensities, measured via numeric rating scale (NRS) and vegetative parameters (fatigue, nausea, vomiting, bloating) at 3, 24, and 48 hours postoperatively. Secondary outcomes were pain medication requirement (mg) and arterial pCO₂ (mmHg). Surgical parameters and intra- and postoperative complications were also recorded.

RESULTS

In total, 178 patients were included. Patients in the LP group (n = 91) showed significantly lower postoperative abdominal and shoulder pain scores, fewer vegetative alterations, lower pain medication requirements, a shorter postoperative hospitalization, and lower intra- and postoperative arterial pCO₂ values compared with the SP group (n = 87; P ≤ 0.01). No differences in intra- and postoperative complications were observed between groups.

CONCLUSIONS

Low-pressure laparoscopy seems to be an effective and safe technique for the reduction of postoperative pain and laparoscopy-induced metabolic and vegetative alterations following laparoscopic hysterectomy for benign indications.

TWEETABLE ABSTRACT

Low-pressure laparoscopy seems to be an effective and safe technique for reduction of pain following laparoscopic hysterectomy.

The Impact of Intraoperative CO 2 Pneumoperitoneum Pressure in Gastrointestinal Surgery: A Systematic Review

INTRODUCTION

Pneumoperitoneum is widely used in gastrointestinal surgery, particularly for laparoscopic or robotic procedures, with suggested advantages associated with low pressure. While existing data predominantly focuses on laparoscopic cholecystectomy, the assessment of intra-abdominal pressures in other gastrointestinal surgeries remains unexplored.

METHODS

This study conducted an electronic literature search for randomized control trials comparing low-pressure pneumoperitoneum to standard or high-pressure counterparts.

RESULTS

Out of 26 articles meeting inclusion criteria, encompassing 2077 patients, 15 demonstrated positive associations with low-pressure pneumoperitoneum. No significant difference in postoperative pain was found in the remaining papers. Methodological variations, diverse outcome reporting, and a prevalent high risk of bias precluded meta-analysis.

CONCLUSIONS

The study highlights substantial outcome variability, urging cautious interpretation of aggregated results. Despite positive associations in specific cases, insufficient evidence was found to support the superiority of low-pressure pneumoperitoneum. The study recommends future research employing validated patient-reported outcome measures and standardized reporting to help guide the development of evidence-based guidelines and optimize patient care in abdominal surgeries.