Physiological Impact of Carbon Dioxide Pneumoperitoneum on Cardiovascular Function and Respiratory Mechanics in Advanced Laparoscopic Surgery

Résumé fourni par la source

Carbon dioxide pneumoperitoneum is an essential component of advanced laparoscopic surgery, but the increase in intra-abdominal pressure required to create the surgical workspace produces important hemodynamic and respiratory alterations. This study analyzed the principal physiological effects of pneumoperitoneum on cardiovascular performance and respiratory mechanics, considering the influence of insufflation pressure, patient positioning, obesity, duration of surgery, mechanical ventilation, and cardiopulmonary reserve. An analytical review of relevant physiological, anesthesiological, and surgical evidence was performed, integrating studies focused on venous return, preload, afterload, systemic and pulmonary vascular resistance, arterial pressure, stroke volume, cardiac output, respiratory compliance, airway pressures, diaphragmatic displacement, gas exchange, and carbon dioxide elimination. The findings showed that pneumoperitoneum can decrease cardiac output while simultaneously increasing mean arterial pressure and systemic vascular resistance, particularly when higher insufflation pressures are used. Respiratory effects were characterized by cephalad diaphragmatic displacement, reduced respiratory system compliance, increased peak and plateau airway pressures, and impaired regional ventilation. These changes were intensified by steep Trendelenburg positioning, prolonged procedures, and obesity. The evidence also demonstrated that arterial pressure alone may not accurately reflect circulatory performance and that elevated airway pressures should be interpreted in conjunction with compliance and thoracoabdominal mechanics. Overall, pneumoperitoneum represents a dynamic cardiopulmonary condition rather than an isolated surgical maneuver. Its physiological impact depends on the interaction between intra-abdominal pressure, ventilation, positioning, body habitus, and baseline cardiopulmonary function. Individualized insufflation pressures, respiratory settings, PEEP, hemodynamic monitoring, and perioperative management may reduce physiological stress and improve safety during complex laparoscopic and robotic-assisted procedures.

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