Intestinal Obstruction Clinical Trial
Official title:
Correlation of Central and Peripheral Measures of Tissue Perfusion During Emergency Laparotomy - a Pilot Study
This study is investigating the effect of intraoperative Noradrenaline on cardiac preload and stroke volume, after initial fluid resuscitation, in order to assess whether there is a masked preload responsiveness and ultimately whether the correction of this potential preload-responsiveness with fluid therapy will translate into increased tissue perfusion in emergency laparotomy.
Early detection and treatment of insufficient tissue perfusion and oxygenation is the main purpose of perioperative haemodynamic monitoring and management. Hypovolemia, septicaemia, and low flow states affecting central and peripheral perfusion are frequent in patients undergoing emergency laparotomy. This study aims to assess the effects of Noradrenaline (NA) on cardiac preload, and tissue perfusion in patients undergoing emergency laparotomy, to investigate potential macro/microcirculatory uncoupling. A single-centre, prospective interventional non-blinded single-arm study at the Department of Anaesthesiology and Intensive care Unit, Copenhagen University Hospital Hvidovre, Denmark. We will include patients undergoing emergency laparotomy. The study start is January 2021. After informed consent, patients will be included if they have an intraoperative need for Noradrenaline infusion >0.1 mcg/kg/min to maintain MAP ≥65 mmHg after resuscitation with a goal-directed fluid therapy algorithm. 20 patients will be included. Intervention: At a steady state (MAP ≥65 mmHg) during the surgical procedure, we will reduce NA to investigate whether patients will be preload responsive while maintaining MAP > 50 mmHg and limiting stroke volume reduction to no more than 30%. After a subsequent fluid challenge, we will increase the dose of NA to re-establish a MAP ≥65 mmHg. In addition, peripheral and central perfusion indices, including gut perfusion, will be measured. ;
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