Ultrasound Guided Preoperative Assessment of Inferior Vena Cava Collapsibility Index in Prediction of Intraoperative Hypotension in Patients undergoing Laparoscopic Cholecystectomy Surgery under General Anesthesia

Abstract

aparoscopic surgery aims to minimize trauma of the interventional process but still achieve a satisfactory therapeutic results. It is commonly performed because of various advantages such as reduced postoperative pain, faster recovery and more rapid return to normal activities, shorter hospital stay, and reduced postoperative pulmonary complications. The operative technique requires inflating gas into the abdominal cavity to provide a surgical procedure. An intra-abdominal pressure (IAP) of 10-15 mmHg is used. Assessment of intravascular volume of patients is a challenging and important task in clinical practice maintaining hemodynamic stability is essential for reducing the rate of postoperative complications and intraoperative hypotension incidence (MAP < 60 mmHg). Although intraoperative hypotension has no universal definition, it has a serious impact on myocardial injury, acute kidney injury, septic complications, the risk of 30-day mortality, as well as the risk of one-year mortality in selected patient populations. The IVC is a major, compliant vessel which carries up to 80% of venous blood returning to the right atrium, it is a large retroperitoneal vessel formed by the confluence of the right and left common iliac veins. Anatomically this usually occurs at the L5 vertebral level. The IVC lies along the right anterolateral aspect of the vertebral column and passes through the central tendon of the diaphragm around the T8 vertebral level.