Category:ABG

Arterial Blood Gas

Select the worst deviation from normal Arterial Blood Gases (ABG) in the first 24 hours of ICU admission as outlined on the APACHE II scoring table. Do not use venous gases.

• an ABG result is preferred, but if no ABG available during the first 24 hours in ICU then select the worst serum CO2

FiO₂ ≤ 49% - Base your selection of the worst ABG on the worst PO2.

FiO₂ ≥ 50% - Base your selection of the worst ABG on the worst AaDO2. AaDO₂ Calculation: (AaDO₂ is the arterial-alveolar O₂ tension difference) AaDO₂ = (Fi02 X 713) - PO₂ - CO₂ e.g. (FiO₂ 0.5 X 713) - PO₂ 85-CO₂ 40 = AaDO₂ 231.5

• all arterial blood gas results (FiO2, PO2, CO2 & PH) should be obtain from the same specimen.TOstryzniuk 20:57, 5 March 2009 (CST)

• See APACHE Scoring table

This element is also collected for:

• Labs test counts

TOstryzniuk 20:07, 5 March 2009 (CST) Template:Stub