Table 1.

Description of tested circuits

Description	Neonatal roller pump	Neonatal centrifugal pump	Paediatric roller pump	Neonatal (used) roller pump
Priming volume (ml)	350	200	900	350
Tubing	Medtronic® Sh. 70 USP class VI 1/4 × 1/16 superTygon®	Intercept® CLASS VI 1/4 × 1/16	Medtronic Sh. 70 USP class VI 3/8 × 3/32 superTygon®	Medtronic Sh. 70 USP class VI 1/4 × 1/16 superTygon®
Oxygenator	Medtronic® 1.5 m2 silicone membrane, Paediatric Extended Capacity Membrane Oxygenator	MEDOS HILITE® 800LT RHEOPARIN® coated polypropylene microporous hollow-fibre	Medtronic® I-2500-2A 2.5 m2 silicone Surgical Membrane Oxygenator	Medtronic® 1.5 m2 silicone membrane, Paediatric Extended Capacity Membrane Oxygenator
Heat exchanger	Medtronic® Heat Exchanger Monitoring adapter and Luer-lock	NA	Medtronic® Heat Exchanger Monitoring adapter and Luer-lock	Medtronic® Heat Exchanger Monitoring adapter and Luer-lock
Hemofilter	Hospal Multiflow 100	NA	Hospal Multiflow 100	Hospal Multiflow 100
Remarks	Freshly primed, reference group	Freshly primed	Freshly primed	Clinically used for at least 48 h before experiment

Manufacturers: Medtronic, Minneapolis, USA; Medos Medizintechnik AG, Stolberg, Germany; Hospal, Lyon, France

NA not applicable