Table 2 Comparison between standard mechanical CPR and ACD CPR
Standard CPR mean ± SD | ACD-CPR mean ± SD | Mean difference (95% CI) | Standard CPR median (quartiles) | ACD-CPR median (quartiles) | p-value | |
|---|---|---|---|---|---|---|
Blood pressures (mmHg) | ||||||
Aortic pressure | 55 (51, 70) | 60 (51, 70) | 0.86 | |||
Right atrial pressure | 54 ± 16 | 55 ± 16 | 1.0 (− 4.0, 6.0) | 0.66 | ||
Coronary perfusion pressure | 2.2 ± 22 | 0.6 ± 20 | − 2.7 (− 10, 4.7) | 0.42 | ||
Oesophageal pressure | 57 ± 38 | 60 ± 39 | 2.6 (− 2.6, 7.8) | 0.28 | ||
Intracranial pressure | 24 ± 6.4 | 23 ± 6.7 | −0.7 (− 1.6, 0.1) | 0.09 | ||
Blood flow | ||||||
Cerebral flow (AU) | 253 ± 268 | 297 ± 264 | 44 (14, 74) | 0.01 | ||
Carotid artery flow (ml/min) | 83 (57, 94) | 97 (70, 106) | < 0.01 | |||
Manual measurements | ||||||
Cardiac output (l/min) | 1.1 (0.8, 1.5) | 1.5 (1.1, 1.7) | < 0.01 | |||
End tidal CO2 (kPa) | 2.2 ± 0.8 | 2.5 ± 1.0 | 0.3 (− 0.1, 0.7) | 0.15 | ||
Blood gases (kPa) | ||||||
pH - Arterial | 7.3 (7.2, 7.4) | 7.3 (7.2, 7.4) | 0.33 | |||
pCO2 - Arterial | 5.6 (4.9, 8.0) | 5.4 (4.4, 8.1) | 0.89 | |||
pO2 - Arterial | 22 ± 20 | 25 ± 21 | 2.5 (−6.2, 11) | 0.52 | ||
pH - Venous | 7.1 (7.1, 7.2) | 7.2 (7,1, 7.2) | 0.09 | |||
pCO2 - Venous | 11 ± 1.9 | 11 ± 1.9 | −0.3 (− 0.5, 0.0) | 0.06 | ||
pO2 - Venous | 3.1 (3.0, 3.6) | 3.3 (3.1, 3.6) | 0.11 | |||