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Coronary Oxygen Balance

Myocardial Oxygen Demand <-> Coronary Artery Blood Flow <-> Oxygen Availability

#cardiac #oxygen #pathophysiology

Coronary Oxygen ... Myocardial Oxygen ... Blood Flow <-> Oxygen ... Availability #cardiac #oxygen

DO2 Equation in Shock = Oxygen Delivery
DO2 = CO x (1.39 x [Hb] x SaO2 +(0.003xPaO2))
DO2

Equation in Shock = Oxygen ... DO2 = Rate of oxygen ... minute) 1.39 = Oxygen ... = Haemoglobin oxygen ... every 1 mmHg of oxygen

Oxygen Delivery by Device

Nasal Cannula
• Indicated for low-flow, low-percentage supplemental oxygen.
• Flow rate of

Oxygen Delivery ... • Delivers oxygen ... • Delivers oxygen ... percentage of oxygen ... Delivers 24%—60% oxygen

Hypoxia and Hypoxemia - Overview
Hypoxia - insufficient oxygen delivered to tissues to meet demands
Hypoxemia - low

- insufficient oxygen ... Hypoxemia - low oxygen ... - atmospheric oxygen ... PAO2 - alveolar oxygen ... alveoli) PaO2 - oxygen

Normal Hemodynamic Cardiac Parameters

Central Venous Pressure

Pulmonary Artery Wedge Pressure

Cardiac Index

Stroke Index

Systemic Vascular

Resistance Index Oxygen ... Delivery Oxygen ... Uptake Oxygen

Oxygen Delivery Systems and Approximate FiO2:
#Management #SupplementalO2 #Oxygen #Delivery #Devices #Interface #FiO2 #NonRebreather #HFNC #NasalCannula #Simple

Oxygen Delivery ... SupplementalO2 #Oxygen

Oxygen Therapy Devices
• Nasal Cannula
• High Flow Nasal Cannula
• Facemask / Non-rebreather
•

Oxygen Therapy Devices ... Intubation #Oxygen

Oxygen Delivery Equation
DO2 = CO x {(1.39 x Hb x sO2) + (PaO2 x 0.03)}
DO2 =

Oxygen Delivery ... DO2 = Rate of oxygen ... 1.39 = Maximal oxygen-carrying ... Partial pressure of oxygen ... to understand oxygen

Graded Oxygen Administration in COVID-19

#respiratory #support #COVID19 #management #schema #criticalcare #hypoxia #failure #algorithm #coronavirus #sarscov2 #oxygen

Graded Oxygen Administration ... coronavirus #sarscov2 #oxygen

Oxygen-Hemoglobin Dissociation Curve

Left Shift (↓ O2 unloading to tissue), Left = Lower:
• ↓ H+ (↑

Oxygen-Hemoglobin ... MatthewHoMD #Oxygen

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