The Effect of Adding Dopamine Infusion to Noradrenaline Infusion Combined With Restrictive Hydration on Renal Function and Tissue Perfusion During Open Abdominal Surgeries

One hundred and twenty patients were randomly assigned into three groups (dopamine norepinephrine group, restrictive hydration group and liberal hydration group) undergoing open abdominal procedures (radical cystectomy and hemi colectomy). In Restrictive group (n=40): Ringer's solution was infused at a rate of 1 ml.kg.h-1 until the basic part of the surgery (tumor resection) is completed to be followed by 3 ml.kg.h-1 of Ringer's solution until the end of surgery. Noradrenaline infusion (0.07mcg.kg.min-1) was combined with fluids until the end of surgery. In Liberal group (n=40): the conventional fluid replacement was introduced according to maintenance, deficit for the first 3 hours (hours fasting x body weight) and 3rd space loss (estimated between 8-10 ml.kg.h-1).

The outcome to be assessed was serial measurements of serum lactate intraoperatively and immediate postoperatively as an index of tissue perfusion, in addition to blood pressure, heart rate and oxygen saturation.