Abdominal aBscess Catheter Sclerotherapy (ABCS)

This is a single center, two arm phase I/II clinical trial exploring the use of chemical sclerosants (ethanol and povidone iodine) in decreasing the time needed for catheter drainage for patients with non-fistulous intraabdominal abscesses. The target study sample size is 60 patients, 30 in each arm and abscess size is to be a minimum of 3cm in all 3 dimensions. The primary outcomes of interest will be tolerability and need for catheter reinsertion by one week post intervention.

Inclusion Criteria: * Male or female, aged over 18years * Cross-sectional imaging (CT, US, MRI) showing an intraabdominal abscess measuring at last 3cm in each dimension without fistula to the bowel or skin. * Provision of signed and dated informed consent form * Stated willingness to comply with all study procedures and availability for the duration of the study Exclusion Criteria: * Pregnancy or lactation * Known allergic reactions to povidone iodine or ethanol * Hemodynamic instability