First try at a combined blood gas and Stewart method calculator. I’m not entirely happy with it, but refinements will come soon. Stewart Method Acid–Base Calculator Strong Ion Difference (SID), Effective Strong Ion Difference (SIDe), Strong Ion Gap (SIG), Partial pressure of carbon dioxide (PaCO₂), Total concentration of weak acids (ATOT). pH PaCO₂ kPa mmHg […]
Read More »A 2-year old male presents with febrile seizure lasting ~10 minutes. 10 minutes after cessation IV access is established and a VBG is taken Results: pH: 7.28 (Reference range: 7.31 – 7.41) pCO2: 60 mmHg (Reference range: 35 – 45 mmHg) HCO3: 18 mmol/L (Reference range: 22 – 29 mmol/L) Base Excess: -8 mmol/L (Reference […]
Read More »I’m going to focus on Arterial blood gases here. Venous gases are close enough in well people, but beware in critical illness there is divergence between arterial and venous samples, particulary in CO2, lactate and pH. Method FiO₂ Calculator 713 x 0.21 = 150 mm Hg Differential Diagnosis HAGMA (CATMUDPILES or LTKR) NAGMA (CAGE, ABCD, […]
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