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Little evidence exists to describe expected volumes of chest tube (CT) drainage after coronary artery bypass grafting (CABG).

The study objective was to map the trajectory of CT drainage volumes from insertion to removal after CABG.

This was a retrospective, descriptive study.

The study included 239 patients who underwent CABG at a single metropolitan hospital in Melbourne, Australia.

The sample (N = 234), aged 68.7 years (standard deviation [SD] 9.9), was predominantly male (N = 185, 79.1%). The mean duration of CT insertion was 45.2 hours (SD 26.7), and total drainage volume was 1300.6 mL (SD 763.8). Drainage volumes plateau to 31 mL per hour, 8 hours after surgery. From 24 to 48 hours, the mean drainage was 21 mL per hour. Drainage volumes varied between genders.

Evidence of similar drainage patterns in other …