Table 1 Patient characteristics and factors at resuscitation in cardiac arrest patients treated in a tertiary intensive care unit based on arterial oxygen levels
All | Not exposed to hyperoxia | Hyperoxia exposure | P-value | |
|---|---|---|---|---|
n = 119 | n = 70 | n = 49 | ||
Arrest location | ||||
OHCA | 43% (51) | 35% (18) | 65% (33) | <0,001 |
IHCA | 40% (48) | 79% (38) | 21% (10) | |
ICUCA | 17% (20) | 70% (14) | 30% (6) | |
Patient characteristics | ||||
Age | 61 (49–74) | 63 (52–72) | 60 (48–75) | 0,633 |
Smoking, | 24% (29) | 27% (19) | 20% (10) | 0,400 |
Obesity | 11% (13) | 13% (9) | 8% (4) | 0,419 |
Pulmonary disease | 20% (24) | 17% (12) | 25% (12) | 0,326 |
Coronary artery disease | 36% (43) | 41% (29) | 29% (14) | 0,151 |
Diabetes | 20% (24) | 21% (15) | 19% (9) | 0,723 |
Pre-arrest OPC 1 | 68% (81) | 65% (45) | 75% (36) | 0,604 |
Resuscitation variables | ||||
Witnessed arrest | ||||
No | 19% (23) | 17% (12) | 22% (11) | 0,471 |
Yes | 81% (96) | 83% (58) | 78% (38) | |
Assumed cause of the arrest | ||||
Cardiac | 49% (58) | 49% (34) | 50% (24) | 0,967 |
Pulmonary/hypoxia | 25% (29) | 24% (17) | 25% (12) | |
Other1 | 26% (31) | 27% (19) | 25% (12) | |
Initial rhythm | ||||
Ventricular fibrillation/Ventricular tachycardia | 40% (47) | 34% (24) | 47% (23) | 0,205 |
Pulseless electrical activity | 20% (24) | 23% (16) | 16% (8) | |
Asystole | 37% (44) | 37% (26) | 37% (18) | |
Other | 3% (4) | 6% (4) | 0% | |
Median (IQR) delay to ROSC (min) | 15 (5–28) | 10 (5–20) | 26 (12–33) | <0,001 |
No-flow | 3 (0–10) | 2 (0–5,5) | 7 (0–11) | 0,008 |
Low-flow | 10 (5–20) | 7,5 (3–15) | 16 (7–22,5) | 0,001 |