Intraoperative fluid management is pivotal to successful outcome of major oncosurgeries . Adequate volume replacement to achieve optimal cardiac performance is critical to prevent any deleterious consequences of under resuscitation or fluid overload . Traditionally CVP monitoring has been tool to guide intraoperative fluid therapy and has poor reliability as indicator of volume status . Transesophageal Echocardiography measured LVEDA is more reliable and sensitive measure of left ventricular volume to guide intraoperative fluid therapy . Investigators plan the study comparing total fluid requirement and postoperative outcomes in two groups of patients receiving central venous pressure (CVP) guided Conventional Fluid Therapy (CFT) and Left ventricular end diastolic area( LVEDA) guided fluids for major oncosurgeries.
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To calculate total intraoperative fluids required in TEE (study) and CVP (control) groups.
Timeframe: Upto 8 hours