ILLUSTRATIONS
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Critical care medicine illustrations by Nick Mark from ICU One Pager based on an understanding of physiology and evidence-based medicine.

Pain, Anxiety, and Delirium

Pain, Anxiety, and Delirium

One of the most important things we do in critical care is manage pain and anxiety while avoiding delirium. Here’s a #OnePager summary of how I assess, prevent, and treat each of these issues. Handy cheat-sheet for RASS & CAM-ICU scoring too

Mar 30, 2020

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Oxygen Delivery by Masks

Oxygen Delivery by Masks

Masks are a common method of delivering supplemental oxygen. This OnePager explains the differences between the different masks used in the ICU: Simple (Hudson) Mask, Face Tent, Venturi Mask, and Non-rebreather Mask.

Aug 1, 2022

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Acid-base Made Easy

Acid-base Made Easy

Acid base abnormalities are ubiquitous in the ICU, and sometimes multiple can coexist at the same time. This OnePager outlines a stepwise approach and differential diagnosis for each acid base abnormality (RAGES for NAGMA, GOLDMARKeT for AGMA, BLVD PLACE for metabolic acidosis, etc). It also includes those handy formulas & rules so you can figure out if more than acid-base disturbance is present.

Jun 10, 2022

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Tracheostomy Emergencies

Tracheostomy Emergencies

Tracheostomies are artificial airways that are inserted in the subglottis directly into the trachea. They are used in the setting of prolonged ventilation or as an emergency airway in the event of being unable to intubate from above. This OnePager reviews the components of a tracheostomy and an approach to managing tracheostomy emergencies, broken down into 3 categories: obstruction, decannulation, and bleeding.

Jul 16, 2021

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Swans Made Simple

Swans Made Simple

As Physiology Nerds we love Pulmonary Artery Catheters, but there are lots of tricky details. How can we tell what chamber it is in? How do we accurately measure PAOP? I made this #OnePager to demystify the Swan and show the expected pressures and waveforms encountered sequentially during placement/wedging.

Mar 24, 2019

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Lobar Collapse on CXR

Lobar Collapse on CXR

Lobar collapse is common in intubated ICU patients. Here is a an ICU One Pager on identifying which lobe is collapsed using just a CXR. Bonus: Teaches you how to get the most out of the PA and lateral too.

Mar 19, 2020

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Pleural Manometry

Pleural Manometry

Thoracentesis can rapidly relieve dyspnea, but not every thoracentesis goes according to plan. Pleural manometry can help identify lung pathologies like entrapped lung and trapped lung, and may even predict response to pleurodesis and likelihood of re-expansion pulmonary edema. This #OnePager explains the principles of pleural manometry and pleural elastance and shows you how to interpret the results.

Aug 15, 2020

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Left Ventricular Assist Devices

Left Ventricular Assist Devices

Left Ventricular Assist Devices (LVADs) are implanted cardiac devices used for hemodynamic support in patients with severe heart failure. This OnePager explains the function & physiology of LVADs as well as the settings and potential complications. (spoiler: this is one time when it’s normal to not have a pulse!).

Jul 1, 2022

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Ketoacidosis Disorders: DKA, HHS, & more

Ketoacidosis Disorders: DKA, HHS, & more

Disorders of ketosis (DKA, HHS, AKA, etc) are very common in the ICU, but can have high morbidity if mismanaged. This OnePager covers the differences between these disorders & provides a differential to identify the underlying cause (the 5 I’s mnemonic: infection, ischemia, inflammation, intoxications, insulin deficiency). It also explains the 3 pillars of treating DKA/HHS: Insulin, IV fluids, and aggressive electrolyte replacement.

May 26, 2022

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Thromboelastography (TEG)

Thromboelastography (TEG)

Coagulation, clotting, and thrombolysis are complicated. Did you ever wish there was one test that could evaluate all three holistically? Turns out there is: Thromboelastography (TEG). Here’s a #OnePager that reviews the principles and interpretation of TEG and shows you how you can use it in resuscitation.

Oct 26, 2020

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Ventilator Troubleshooting 1: High Pressure Alarm

Ventilator Troubleshooting 1: High Pressure Alarm

Ventilators can be scary, especially when they alarm. One of the most common alarms is the High Pressure Alarm. This #OnePager explains how you can rapidly determine if High Pressures are due to a Resistance Problem, a Compliance Problem, or a PEEP problem.

Jan 28, 2022

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Approach to Pulmonary Embolism

Approach to Pulmonary Embolism

Pulmonary Embolism is a complex and challenging clinical problem that varies from incidental to immediately life threatening. This OnePager summarizes my approach to PE including diagnosis, prognostication, and how I manage anticoagulation, hemodynamics, and thrombolysis or other therapies.

Apr 3, 2020

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