Does water immersion WASH in bowel scope?

Rutter et al 1 should be congratulated on this first randomised controlled trial (RCT) comparing water-assisted sigmoidoscopy (WAS) versus carbon dioxide (CO2) insufflation in patients undergoing English Bowel Scope Screening (BSS). The authors reported no significant difference in the primary outcome of recalled pain, or in secondary outcomes of adenoma detection rate (ADR) between WAS and CO2 insufflation groups. Before we consider the study...