Table 1

Clinical details at start of study

Case No	Gestation (weeks)	Birthweight (g)	Age (h)	MAP cm H₂O	FIO₂%	Paralysed	Surfactant	PDA	TR
1	28	935	49	9	60	−	+	−	+
2	34	2790	26	12	42	−	−	−	+
3	36	2990	76	11	40	+	−	−	−
4	27	800	56	8	28	−	+	+	+
5	27	960	36	12	65	−	+	+	+
6	27	1130	35	13	50	−	+	+	−
7	28	1250	48	9	40	+	+	+	+
8	29	1024	36	12	50	−	+	+	+
9	30	1200	36	14	29	+	−	+	+
10	30	1460	9	14	58	−	−	+	+
11	30	1490	48	13	60	+	−	+	+
12	31	1945	24	14	44	+	−	+	+
13	32	1490	35	12	45	−	+	+	+
14	33	1640	64	11	24	+	−	+^*	+
15	33	2260	72	13	20	+	−	+	+
16	35	2720	41	20	65	+	+	+	+
17	36	2325	13	0	50	−	−	+	+
18	36	2560	38	0	45	−	−	+	+

MAP = mean airway pressure; PDA = patent ductus arterius; TR = pansystolic (measurable) tricuspid regurgitation. Cases 1 to 3 had a closed arterial duct; the rest had a patent duct. ^* The arterial duct closed between 86 and 96% SaO₂.