End expiratory oxygen concentrations to predict central venous oxygen saturation: an observational pilot study

BMC Emergency Medicine

Table 1 Physiologic breath and blood measurements of all patients.

Gender	Average Peak EtCO2 (mmHg)	Average Minimum EtO2 (mmHg)	Average Tidal Volume (L)	Average Peak Flow (L/sec)	Deep Exhaled Maximum EtCO2 (mmHg)	Deep Exhaled Minimum EtO2 (mmHg)	Average Measured ScVO2 (%)	Predicted ScVO2 (%)
F	28	107	0.10	0.25	38	99	63	67
F	35	115	0.21	0.32	38	111	82	74
F	47	97	0.23	0.14	52	79	78	72
M	29	125	0.40	0.13	38	105	77	76
M	40	108	0.50	0.10	41	107	78	75
M	47	101	0.10	0.10	44	106	82	76
M	36	111	0.51	0.55	40	99	80	70
F	39	106	0.20	0.20	37	107	73	68
F	45	100	0.12	0.13	49	93	78	75
M	38	116	0.40	0.40	42	104	87	78
F	46	112	0.25	0.30	50	105	77	83
M	21	123	0.30	0.60	33	114	47	59
M	37	114	0.30	0.25	40	106	52	70
M	32	123	0.33	0.34	40	110	64	76
M	44	100	0.21	0.32	45	100	66	69
F	33	109	0.23	0.50	32	113	74	66
M	31	116	0.30	0.40	34	103	86	68
M	37	111	0.34	0.50	40	107	65	71
M	45	108	0.24	0.15	50	97	60	77
M	35	122	0.14	0.33	43	114	79	78
M	40	123	0.41	0.43	42	114	68	81

EtO2 – end-tidal oxygen; EtCO2 – end-tidal carbon dioxide; ScVO2 – central venous oxygen saturation; L – liters; mm Hg – millimeters of mercury; sec – second; M – male; F – female.

ISSN: 1471-227X