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Table 2 Decreasing PetCO 2 with clinical risk-conditions

From: In emergently ventilated trauma patients, low end-tidal CO2and low cardiac output are associated and correlate with hemodynamic instability, hemorrhage, abnormal pupils, and death

  PetCO2(mmHg)  
Condition: Present Absent P-value
Cardiac Output < 4.5 L/min 19.5 ± 8.7 31.9 ± 5.9 < 0.0001
Injury Severity Score > 20 28.7 ± 9.4 32.5 ± 9.3 0.0012
Hypotension 18.9 ± 12.0 32.5 ± 7.4 < 0.0001
Bradycardia 17.6 ± 12.2 31.9 ± 8.1 < 0.0001
Cardiac Arrest 8.4 ± 7.9 31.6 ± 8.1 < 0.0001
Major Blood Loss 23.1 ± 12.8 31.7 ± 8.3 < 0.0001
RBC Transfusion 22.8 ± 10.6 32.1 ± 8.7 < 0.0001
Abnormal Pupils 27.4 ± 11.1 31.4 ± 9.0 0.0002
Death 24.4 ± 13.5 31.6 ± 7.5 < 0.0001
  1. PetCO 2 end-tidal carbon dioxide, RBC Red Blood Cell.