The concentration of oxygen, lactate and glucose in the central veins, right heart, and pulmonary artery: a study in patients with pulmonary hypertension

Table 2 Individual measurements of SO₂ and [Lac], and their gradients, obtained by sampling different sites during right heart catheterization

Patient number	IVC	SVC	RA	RV	PA	ΔSO₂ or Δ[Lac]
SO₂ (%)
1	80.9	76.5	75.6	72.5	71.9	ΔSO₂ = 4.7
2	77.5	69.1	65.6	66.5	64.5	ΔSO₂ = 4.6
3	72.9	69.2	67.7	67.5	66.3	ΔSO₂ = 2.9
4	68.2	67.4	63.1	62.8	61.5	ΔSO₂ = 5.9
5	61.9	59.2	52.6	51.9	52.6	ΔSO₂ = 6.6
6	78.7	84.5	79.2	80.0	79.7	ΔSO₂ = 4.7
7	84.7	81.5	80.6	79.2	79.7	ΔSO₂ = 1.8
8	59.8	55.9	55.2	55.9	52.7	ΔSO₂ = 3.2
9	50.3	57.4	53.1	51.8	51.9	ΔSO₂ = 5.5
Mean	70.5	69.0	65.8*^†	65.3*^†	64.5*^‡	ΔSO₂ = 4.4
SD	11.4	10.4	10.9	10.8	11.0	ΔSO₂ = 1.6
[Lac] (mmol/l)
1	0.43	0.55	0.41	0.40	0.38	Δ[Lac] = 0.17
2	2.17	1.98	1.91	1.95	1.93	Δ[Lac] = 0.05
3	1.07	1.00	0.89	0.87	0.90	Δ[Lac] = 0.10
4	1.39	1.24	1.25	0.97	0.89	Δ[Lac] = 0.34
5	1.53	1.25	1.18	1.20	1.24	Δ[Lac] = 0.01
6	0.63	0.86	0.62	0.66	0.63	Δ[Lac] = 0.23
7	1.09	0.86	0.79	0.79	0.63	Δ[Lac] = 0.23
8	1.04	1.21	0.98	1.08	1.09	Δ[Lac] = 0.12
9	0.86	0.98	0.86	0.86	0.85	Δ[Lac] = 0.14
Mean	1.13	1.10	0.99^§	0.97^§	0.95*^†	Δ[Lac] = 0.16
SD	0.52	0.40	0.43	0.43	0.45	Δ[Lac] = 0.10

Nine patients were included. * P < 0.01, ^§P < 0.05 compared with IVC. ^‡P < 0.01, ^†P < 0.05 compared with SVC. CI, cardiac index; IVC, inferior vena cava; [Lac], lactose concentration; MAP, mean arterial pressure; PAOP, pulmonary artery occlusion pressure; RA, right atrium; RV, right ventricle; So2, oxygen saturation; SVC, superior vena cava.

ISSN: 1364-8535