Calculator: Shunt Equation

The Berggren Equation, also known as the shunt equation. Berggren Equation Shunt Fraction Calculator Units mmHg kPa PAO2 Calculator FIO2 (%) PaCO2 (mmHg) Equation: PAO2 = FIO2 × (PB − PH2O) − (PaCO2 / 0.8), with PB = 760 mmHg and PH2O = 47 mmHg Compute & Fill PAO2: – Hide CcO2 [PAO2] Calculate mmHg […]

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Dimensionless Index

What a stupid name. Nonetheless it’s what we’re stuck with. It is the ratio of LVOT VTI to AV VTI. Given that ALL ratios are dimensionless, you can see my chagrin. VTI LVOT / VTI AV LVOT is measured with pulse wave, to localise it to the LVOT AV VTI is measured with continuous wave, […]

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Organ Donation

What follows is a curated distillation of the ANZICS Statement on Death and Organ Donation. Donation after Circulatory Determination of Death (DCDD) Maastricht classification – only 3 & 4 used in Aus/NZ Category Context Warm ischaemic time Degree of control Category 1 Dead on arrival Unknown Uncontrolled Category 2 Failed resuscitation (ED or ICU) Known […]

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Death

Death is defined variably (or not defined at all) in jurisdictions around the world, but are mostly similar. What follows below are the two types of determination of death, as recommended in the ANZICS Statement on Death and Organ Donation Neurological Determination of Death Preconditions Clinical testing Cranial Nerves Tested (II – X) Reflex Afferent […]

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Pleural Fluid

Ok, so classically we talk about transudates vs exudates by pleural fluid analysis. I’ll reframe this (I’m sure it’s already obvious to you, but hey) as ‘how can we diagnose an exudate, and the cause’ Protein & LDH Differential Glucose pH Amylase Cholesterol

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Good Guidance

Locations of major topic guidelines, in alphabetical order by subject Death & Organ Donation: ANZICS Statement DKA (adult): JBDSIC (3ed) 2022 ECMO Guidance: ELSO Guidelines Extracorporeal treatments in toxicology: EXTRIP Recommendations Resuscitation: ARC Guidelines TBI: BTF Guidelines (4ed) 2016 Patient Transport: ACEM/ANZCA/CICM Guidance British Thoracic Society: BTS Guidelines

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