PHYScalc: Blood Gas Calculator

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 […]

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MRI changes in Haemodialysis and Manganism

Well what do you know? Seems there might be some association between haemodialysis patients getting high serum manganese levels and imaging changes in the brain on T1-weighted MRI A Preliminary Study Revealing a New Association in Patients Undergoing Maintenance Hemodialysis: Manganism Symptoms and T1 Hyperintense Changes in the Basal Ganglia | American Journal of Neuroradiology

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Simple Molecule Size Searcher

This is just to find out what molecules are the right size for what sort of extracorporeal removal, if at all. These weights are (mostly) just an approximation, especially as they get into the tens of thousands. Have a go. I found it interesting, hopefully you might, too. NB: Haemodialysis generally removes molecules <20kDa in […]

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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, […]

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