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OBJECTIVE: To evaluate the haemodynamic effects of rapid fluid bolus therapy (FBT) (500 mL of 4% albumin over several minutes) versus combined FBT (rapid 200 mL FBT followed by a 300 mL infusion over 30 minutes). DESIGN: Single centre, prospective, before-and-after trial. SETTING: A tertiary intensive care unit in Australia. PARTICIPANTS: Fifty mechanically ventilated post-cardiac surgery patients.  INTERVENTIONS: Rapid 4% albumin FBT versus combined FBT. MAIN OUTCOME MEASURES: We recorded haemodynamic parameters from before FBT to 30 minutes after FBT. A mean arterial pressure (MAP) response was defined by a MAP increase &gt; 10%, and a cardiac index (CI) response was defined by a CI increase &gt; 15%. RESULTS: Immediately after rapid FBT versus combined FBT, there was a CI response in 13 patients (52%) compared with five patients (20%) respectively (P = 0.038), and a MAP response in 11 patients (44%) in each group. However, from FBT administration to 30 minutes, there was a time and group interaction such that MAP was higher in the rapid FBT group (P = 0.003), as was the case for central venous pressure (P = 0.002) and mean pulmonary artery pressure (P &lt; 0.001). Body temperature fell immediately and was lower with rapid FBT but became warmer than with combined FBT later (P &lt; 0.001). At 30 minutes, a MAP response was seen in ten patients (40%) compared with nine patients (36%) (P &lt; 0.99) and a CI response was present in eight patients (32%) compared with 11 patients (44%) (P = 0.56) in the rapid versus combined FBT groups respectively. CONCLUSION: Rapid FBT was superior to combined FBT in terms of mean MAP levels and immediate CI response. However, the number of MAP responders or CI responders was similar at 30 minutes.

critical care and resuscitation/acritical care and resuscitation :

Rapid 500 mL albumin bolus versus rapid 200 mL bolus followed by slower continuous infusion in post-cardiac surgery patients: a pilot before-and-after study