Abstract 69: Evaluation Of Abdominal Blood Flow During Chest Compression In Cardiac Arrest Patients Using Enhanced Computed Tomography (CT)
Background: The mechanism of blood flow during chest compression in cardiac arrest patients remains under investigation. We often experience that cardiac arrest patients suffer severe diarrhea after successful cardiopulmonary resuscitation(CPR), which would be attributable to intestinal ischaemia during cardiac arrest and resuscitation. However, few studies have been made to evaluate abdominal blood flow during chest compression in cardiac arrest patients.
Patients and Methods: The study was made in four patients immediately after termination of cardiopulmonary resuscitation. A 100ml bolus of 300 mgI/ml contrast medium was injected from a short femoral vein catheter, followed by continuous chest compression at a rate 100/min. In order to evaluate the distribution of contrast medium, CT images of the chest and abdomen were taken after 100 and/or 200 chest compressions, respectively.
Results: CT scans showed similar enhance patterns in the patients. After 100 chest compressions, enhancement values were higher at inferior vena cava(IVC) regions compared to ascending aorta and main arteries. After 200 compressions, enhancement values of the arteries were increased by two to four times. However, significant enhancement of hepatic veins and limited enhancement of portal veins suggest impaired perfusion of the liver and the bowel.
Conclusion: One hundred or 200 chest consecutive compressions are not sufficient to enhance abdominal organs including the liver and bowel.