Better Abscess Drainage

In this episode, our hosts Drs. Michael Barraza and Aaron Fritts interview Dr. John Pavlus about his methods of drain placement, monitoring, and removal, as well as his vision to design an ideal drainage system.

Dr. Pavlus became interested in abscess drains when he noticed that across different institutions had very different indications, types, and methods of putting in drains. Dr. Pavlus prefers to place drains under ultrasound guidance, and he will also obtain a CT image afterwards to ensure the drain is in place. The doctors discuss their favorite guidewires to use: Dr. Pavlus prefers the Coons wire and Dr. Barraza prefers the Amplatz wire.

For deep pelvic cul-de-sac abscesses, Dr. Pavlus describes how he obtains transgluteal access and uses a Hawkins needle. Liver abscesses can be challenging, due to their variety of drainage contents (hematoma, bile, necrotic material), and increased time of drainage. We also discuss the debate between suction bulbs and gravity drainage bags, noting that research studies and personal experiences have not shown significant differences in the rate of fistula formation with either method. One exception is post-operative spinal drainage, where using suction could confer the risk of removing CSF.

To assess when a drain needs to be removed, Dr. Pavlus monitors the output and obtains a CT. He prefers to take ownership of drain care and remove drains that he originally placed, but if needed, he also collaborates with trauma surgeons to ensure that drains and sutures are removed properly. Dr. Pavlus also recognizes the need to standardize follow up care for drains. Dr. Barraza describes a workflow for drain checks at his fellowship site, which included daily rounds and a standardized checklist for each patient.

Finally, Dr. Pavlus speaks about his ongoing mission to design an ideal drainage system for various dwell times, viscosity of contents, and catheter sizes.