Participants
cardiovascular or lung disease, malignancy, asthma, obstructive gastrointestinal disease
KIDNEY FAILURE, ASTHMA, INFLAMMATORY BOWEL DISEASE
Patients 18 to 70 years old (median 67) scheduled for a colonoscopy at the gastroenterology outpatient clinic were screened for eligibility. Patients were excluded if they had malignancy, inflammatory bowel disease or obstructive gastrointestinal disease suspected in advance or confirmed during colonoscopy. Other exclusion criteria were use of anticoagulants, symptomatic cardiovascular or lung disease, kidney failure, contraindications to the trial positioning procedure or contrast fluid (Barium sulfate suspension 105% w/v, Liquid Polibar Plus, E-Z-EM Canada Inc), asthma, breastfeeding or ongoing or planned pregnancy. All participants signed informed consent before trial inclusion.