‘Landmark’ trial
This is a “landmark” trial and “so clinically relevant because of its choice of real world-appropriate aggressive-resuscitation and moderate-resuscitation treatment groups, its use of pancreatitis severity as the main clinical outcome, and its reliance on the carefully defined variable of fluid overload as the main safety outcome,” Dr. Gardner wrote in his editorial.
“Unlike in most other randomized, controlled trials of fluid resuscitation in acute pancreatitis, patients with varying baseline pancreatitis severity were included, and changes in the rate of resuscitation were determined on the basis of a dynamic assessment of hemodynamic testing, imaging, and clinical factors,” he added.
Dr. Gardner said the WATERFALL trial results lead to several conclusions.
First, the need to focus on a steady rate of initial resuscitation – no more than 1.5 mL/kg of body weight per hour. Clinicians should administer a bolus of 10 mL/kg only if there are signs of initial hypovolemia.
Second, that careful clinical and hemodynamic monitoring are essential during the first 72 hours after admission to make sure that patients remain euvolemic and to avoid fluid overload.
Third, that diuresis in patients with fluid overload in the first 72 hours is most likely beneficial and certainly not detrimental to important clinical outcomes.
Dr. Gardner said the trial also highlights the need to focus research efforts on evaluating other pharmacologic therapies instead of crystalloid fluids.
“Performing randomized controlled trials in acute pancreatitis is notoriously difficult, and the limited human and financial resources that are available for appropriately powered trials in this field post WATERFALL are much better spent on comparative-effectiveness and placebo-controlled trials evaluating new therapeutic agents,” Dr. Gardner said.
“Now that we have gone over the WATERFALL, it is time to look downstream at new targets to treat this challenging disease,” he concluded.
Support for the trial was provided by Instituto de Salud Carlos III, the Spanish Association of Gastroenterology, and ISABIAL (Instituto de Investigación Sanitaria y Biomédica de Alicante).
A version of this article first appeared on Medscape.com.