Table 3

Haemodynamic variables for individual patients during initial period of positive pressure ventilation (IPPV), negative pressure ventilation (NPV), and in selected patients following reinstitution of positive pressure ventilation (IPPV₂)

	Cardiac index (l/min/m²)					a-v Difference (ml/dl)		MV saturation (%)
Patient	IPPV	NPV	IPPV₂	IPPV	NPV	IPPV₂	IPPV	NPV	IPPV₂	IPPV	NPV	IPPV₂
1	2.70	2.82		119	116		4.39	4.11		73.8	75.5
2	5.41	6.10		179	190		3.31	3.12		74.0	75.8
3	4.10	4.57		164	163		4.00	3.50		77.3	78.9
4	4.36	4.91		218	223		5.00	4.54		71.1	74.2
5	4.29	4.18		146	141		3.40	3.36		78.3	77.7
6	3.78	4.10		197	219		5.20	5.24		71.6	72.0
7	3.00	3.35		134	132		4.50	4.00		68.7	71.9
8	3.08	3.77		135	156		4.39	4.14		75.4	77.2
9	5.23	6.09		205	198		3.92	3.25		77.0	78.4
10	2.40	3.20		155	181		6.46	5.69		58.4	63.3
11	1.50	1.83	1.59	88	108	108	5.98	5.90	6.79	55.2	55.1	50.4
12	1.10	1.38	1.24	103	125	131	9.36	9.05	10.6	46.0	48.8	41.0
13	2.54	2.77	2.70	213	209	216	8.37	7.54	7.86	54.0	58.1	57.2
14	6.82	8.00	8.30	290	310	306	4.25	3.84	3.70	71.0	74.2	75.6
15	2.37	4.08	2.71	120	143	138	5.06	3.50	5.10	67.1	71.9	63.2
16	2.77	3.26		173	187		6.25	5.74		61.7	64.7

V˙o ₂, oxygen consumption; a–v difference, arteriovenous oxygen difference; MV saturation, mixed venous oxygen saturation.