Routine CABG. Set up for case, all checks completed and satisfactory.

Harvesting of left radial artery and LIMA, so lines are not connected to the patient yet.

1045-Heparin given upon completion of left radial harvest.

1047-Connected lines up to the operating table.

1050-Checked gas flow through CDI, checked suckers and ACT reached 512

1050-1116-Connected to patient, gas flow set to 2.5 (this was enabled with no issues), RAP of arterial and venous lines.

1116-1117-Commenced CPB

1117-1122-Initial sight of arterial blood is red

Observation of venous and arterial blood darkening. Checked CDI and pO2 starting to drop. Perfusionist instructed nursing assistant to bring in another perfusionist. Perfusionist increases gas flow, no changes, no alarm from EGB.

Instructed anaesthetist to keep the lungs on. During this time tug tests of the gas line, no issues. Checked green gas line from EGB to oxygenator (including oxygen sensor); all in tact and no air leaks. Another perfusionist enters theatre and connects oxygen from a tank to the oxygenator and another perfusionist brings in a Sechrist gas blender.

Terminated CPB and transfused volume to the patient, patient stable.

1124-Perfusionist recommences CPB with the Sechrist gas blender. Case continues with no further problems and the patient is fine.

Post-CPB we connected the original EGB to the HLM and an error appears on the HLM "module/sensor defective". This had not occurred when the HLM was first turned on.