Abstract

CORREA BORRELL, Mayda; POZO ROMERO, José Antonio  and  FERNANDEZ RAMOS, Humberto. Inverse inspiration/expiration ratio in laparoscopic cholecystectomy. Rev cuba anestesiol reanim [online]. 2012, vol.11, n.3, pp. 220-229. ISSN 1726-6718.

Introduction: advances in mechanical ventilation are crucial to the implementation of developments in surgery and anesthesiology. Insufflation of carbon dioxide into the peritoneal cavity during laparoscopic surgery has an impact on the respiratory system. Effective mechanical ventilation is required to control the gas and the increase in pulmonary pressure created by the pneumoperitoneum. Non-habitual ventilation modes could be used to achieve this end, ameliorating the physiological alterations of the breathing apparatus and achieving optimal ventilation. Objectives: review updates on mechanical ventilation and modified inspiration/expiration ratio, and explain its benefits regarding anesthesia for laparoscopic cholecystectomy. Content: an examination was conducted of the conceptual and technical aspects of the inspiration/expiration ratio and the history of its application in the adult respiratory distress syndrome, particularly its effects on ventilatory and oxygenation parameters. Benefits were associated with disorders appearing during mechanical ventilation for videolaparoscopic cholecystectomy. Conclusions: ventilation with a modified inspiration/expiration ratio is feasible during the anesthesia time required for videolaparoscopic cholecystectomy.

Keywords : inverse inspiration/expiration ratio; prolongation of inspiration time; pathophysiology of the pneumoperitoneum; videolaparoscopic cholecystectomy.

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