TABLE 3

Volatile organic compounds showing a significant correlation (r) between the external outlet of the membrane and the outlet of the tube of the ventilator

Retention time min	r	p-value	Proportion breath/ECMO	Identity	Presumed source
2.32	0.56	0.0018	0.61	Acetone	Endogenous
2.47	0.37	0.0472	0.55	Isoprene	Endogenous
2.78	0.84	0.0000	0.99	2-Propanol, 1,1,1,3,3,3-hexafluoro-	Anaesthetic
3.22	0.38	0.0395	1.26	1-Propanol	Exogenous
3.50	0.45	0.0139	0.4	Pentane, 3-methyl-	Endogenous?
3.80	0.41	0.0255	1	Pentane, 2,4-dimethyl-	Endogenous?
4.20	0.48	0.0090	0.80	Furan, 2-methyl	Exogenous
4.22	0.53	0.0029	0.54	Ethyl acetate	Endogenous
5.78	0.43	0.0197	0.99	2,4-Hexadiyne	Exogenous
7.33	0.89	0.0000	1	1-Pentene, 2,4,4-trimethyl-	Exogenous
8.85	0.82	0.0000	1.18	Unknown
9.72	0.38	0.0431	1.27	Unknown
9.83	0.79	0.0000	1.19	Unknown
11.40	0.62	0.0004	0.89	Unknown
11.47	0.67	0.0001	0.83	Benzene, chloro-	Exogenous
11.95	0.68	0.0000	0.41	3-Hexanone, 2-methyl-	Endogenous?
14.47	0.56	0.0015	0.83	2-Propanol, 1,1,1-trichloro-2-methyl-	Exogenous
14.47	0.70	0.0000	0.99	Unknown
14.88	0.41	0.0286	0.62	Pentane, 2,2,3-trimethyl-
15.23	−0.44	0.0161	6.35	Unknown
15.55	0.73	0.0000	1.22	d-Limonene	Exogenous
17.07	0.60	0.0006	0.90	Unknown
18.55	0.67	0.0001	0.66	Undecane	Endogenous?
19.03	0.62	0.0003	0.84	Unknown
19.53	0.76	0.0000	0.82	Unknown
20.65	0.86	0.0000	0.77	Unknown
21.10	0.75	0.0000	0.88	Unknown
21.22	0.60	0.0005	0.94	Unknown
21.32	0.40	0.0299	0.18	Propofol	Anaesthetic

ECMO: extracorporeal membrane oxygenation.