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ICU Physiology in 1000 Words: The Right Atrial Pressure Does Not Determine Cardiac Output – Part 2

PulmCCM

Kenny MD [ @heart_lung ] In part 1 , right atrial pressure [P ra ] and cardiac output/venous return [CO/VR] were considered as two hemodynamic measures bound at the operating point [OP] of the circulatory system. OP is operating point. Shows what happens when Ppc, Pmsf, Rcardiac and Rvr all vary [grey operating points].

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Boating trauma

EM SIM Cases

WHY IT MATTERS Patients in hemorrhagic shock require blood products expeditiously as well as identification and definitive management of the source of bleeding. This case provides an opportunity to practice identification and treatment of multiple sources of blood loss in hemorrhagic shock.

Shock 52
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ICU Physiology in 1000 Words: The Right Atrial Pressure Does Not Determine Cardiac Output – Part 1

PulmCCM

If changes in P ra cause changes in CO, shouldn’t we then know the etiology of shock with certainty? Additionally, this model clarifies that the dependent variable is the ‘operating point’ [OP] which is composed of both CO and P ra , simultaneously. The dependent variable is the operating point [i.e.,

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Cardiac Rhythms/ECG Module

Don't Forget the Bubbles

For anyone approaching a structured ABC would be a priority to establish whether shock was present or not. Typical features include: HR >220bpm Narrow complex regular tachycardia P waves difficult to identify In this case there is no shock present so we can proceed to the right branch of the ALSG guideline.

EKG/ECG 98
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REBEL Core Cast 94.0 – SBO

RebelEM

Late findings Fever Abdominal distension (+) LR: 5.64 – 16.8 (-) LR: 0.34 – 0.43 Absent bowel sounds Peritoneal signs (i.e. rebound and guarding) Diagnostics Laboratory Tests Commonly ordered lab tests (i.e. 2.3 – 5.4) (-) LR: 0.18 (0.09 – 0.35) Ultrasound Findings Dilated loops of bowel (diameter > 2.5

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Early Modern Resuscitators

Advanced Emergency Nursing from AENJ

Review of the Wellcome Library movies on YouTube (1945) [ links below in references ] is instructive as to resuscitative methods of the 1930s and 1940s: Manual methods; gas bag or bellows operated by hand or machine; an anesthesia gas machine; or iron lung. Evaluation: Manually Operated Resuscitators (1971) Emergency Care Research Institute.

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What Minimal Volume of Intravenous Fluid Challenges the Heart?

PulmCCM

.’ What they found 45 critically-ill patients were included with a 28-day mortality rate of 29%; distributive shock was the most common cause of circulatory failure with sepsis being the most common cause of distributive physiology. Download his free textbook here.