Prophylactic use of proton pump inhibitors post-cardiac surgery

Gastrointestinal bleeding significantly increases morbidity and mortality rates postoperatively in patients undergoing cardiac surgery. The prophylactic prescribing of proton pump inhibitors post-cardiac surgery is currently a class IIa recommendation of the European Association of Cardio-Thoracic Surgery.

A retrospective review of patients who underwent cardiac surgery between July and December 2019 in the authors' hospital was carried out, using discharge summaries. New treatment charts were introduced with a pre-printed proton pump inhibitor included in the 'regular medication' section of the treatment chart and two reaudits were performed using the same methodology.

Before the intervention, 47% were prescribed omeprazole postoperatively, compared to 74% (P<0.001) and 66% (P=0.008) in the first and second reaudits respectively. Gastrointestinal bleeding was more common pre-intervention (4% vs 1% respectively; P=0.10).

This intervention resulted in a statistically significant improvement in the prescription of postoperative omeprazole and a decrease in gastrointestinal bleeds. However, other risk factors such as diabetes mellitus, arteriosclerosis and procedure urgency may have contributed to the absence of statistical significance in the latter.