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Acid Base Disorders - Formulas for appropriate metabolic and respiratory compensation

- Dr Amith Sreedharan - Consultant
Acid Base Disorders ... and respiratory ... #Metabolic #Acidosis ... #Alkalosis #Compensation ... Diagnosis #Nephrology #AcidBase
Arterial Blood Gas (ABG) Analysis - Metabolic + Respiratory Acidosis + Alkalosis

pH ↓ pCO2 ↓ -
+ Respiratory Acidosis ... pCO2 ↑ - Metabolic ... Interpretation #AcidBase ... #Diagnosis #Compensation ... #acidosis #alkalosis
Acid-Base Disorders - Differential Diagnosis Algorithm
Acidemia (pH < 7.35)
 • Metabolic Acidosis (HCO3 < 24mmol/L) CO2
Acid-Base Disorders ... Acidosis (HCO3 ... Acidosis (pCO2 ... < 35 mmHg) #AcidBase ... Algorithm #Causes #Compensation
Acid-Base Disorders - Differential Diagnosis Framework

 • Respiratory Acidosis
 • Respiratory Alkalosis
 • Metabolic Acidosis
 •
AcidosisRespiratory ... AlkalosisMetabolic ... AcidosisMetabolic ... Kfischer_10 #AcidBase ... #alkalosis #respiratory
Summary of metabolic compensation for respiratory acid-base disorders
#Diagnosis #Nephro #Respiratory #Acidosis #Alkalosis #Metabolic #Compensation #Formulas #Curbsiders
Summary of metabolic ... compensation for ... disorders #Diagnosis ... #Acidosis #Alkalosis ... #Metabolic #Compensation
Acid Base Compensation - Directions - If all three variables (pH, HCO2, pCO2) move in the
Acid Base Compensation ... Diagnosis #Nephro #AcidBase ... #Acidosis #Alkalosis ... #Metabolic #Respiratory ... #Compensation #
#Diagnosis #Nephro #AcidBase #Disorders #Acidosis #Alkalosis #Metabolic #Respiratory #Algorithm #Curbsiders
Diagnosis #Nephro #AcidBase ... #Disorders #Acidosis ... #Alkalosis #Metabolic ... #Respiratory #Algorithm
Arterial Blood Gas (ABG) Interpretation
 • AG/non-AG Metabolic Acidosis
 • AG Acidosis "Delta/Delta"
 • Metabolic Alkalosis
/Delta" • Metabolic ... AlkalosisRespiratory ... AcidosisRespiratory ... Interpretation #diagnosis #acidbase ... #acidosis #alkalosis
Acid-Base Disorders - Expected Compensation Equations

Metabolic Acidosis:
 • pCO2 = 1.5 x HCO3 + 8 ±
Acid-Base Disorders ... #Acid #Base #AcidBase ... #Disorders #Compensation ... #Metabolic #Respiratory ... #Acidosis #Alkalosis
Blood Gas (ABG) Interpretation and Acid-Base Pathology
1- Does the patient have an acidosis or an alkalosis?
or an alkalosis ... alkalosis **If ... MSc @AmyChung #AcidBase ... #Metabolic #Acidosis ... #Alkalosis #Diagnosis