Tab. II.

Differential drainage volume from each chest tube

Group	Total blood loss	p	Mediastinal drainage tube	Pericardial drainage tube	Total mediastinal drainage volume*	p	Thoracic drainage tube	p
I	536.67 ± 237.873	0.383	200 ± 118.722	–	200 ± 118.722	0.085	340 ± 165.258	0.711
II	656.97 ± 407.634		287.66 ± 186.188	–	287.66 ± 186.188		346.09 ± 215.910
III	577.27 ± 374.349		133.33 ± 85.847	142.42 ± 81.606	272.73 ± 164.098		304.55 ± 259.541

^*The volume of pericardial drainage was added to the volume of mediastinal drainage for group III.