biochemistry – Critical Care Info

PHYScalc: Sodium

Let’s start with the Adrogué–Madias (A-M) formula (1997): Na+ deficit = TBW fraction x weight x ΔNa+ Sodium Deficit Calculator Sex Male (0.6)Female (0.5) Weight: 80 kg Starting [Na+]: 110 mmol/L Target [Na+]: 115 mmol/L Sodium deficit = ksex × Wt × Δ[Na+] = 150 mmol Glucose-adjusted Sodium Calculator Glucose-adjusted Sodium Calculator Measured [Na+] 115 […]

RRT Molecule Removal Methods

Blood Gases

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, […]