Table 1 Patient characteristics

Total no. of patients (male/female)

8/4

Mean age [years]

62 ± 7.2

Previous medical history

 COPD

3

 Diabetes mellitus

3

 History of myocardial infarction

2

BMI (kg/m²)

25.6 ± 3.2

Type of cardiac surgery

 CABG

4

 Valves

4

 CABG + valves

2

 Aortic operation

2

Internal thoracic artery grafting

3

Re-exploration for bleeding

2

Microorganisms

 GPC

6

 GNB

3

 Negative

3

Average hospitalization time (days)

20.2 ± 3.5