title: Bacterial contamination of suction catheter tips   during aortic valve replacement surgery: a   prospective observational cohort study.
mesh_terms: D001021:Aortic Valve / Q000601:surgery*; D001419:Bacteria / Q000302:isolation & purification*; D057785:Catheters / Q000382:microbiology*; D015331:Cohort Studies; D019317:Evidence-Based Medicine; D006801:Humans; D011446:Prospective Studies