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Acid Base Disorders - Formulas for appropriate metabolic and respiratory compensation

- Dr Amith Sreedharan - Consultant
Base Disorders - Formulas ... metabolic and respiratory ... compensation ... #Formula #Winters ... Diagnosis #Nephrology #AcidBase
Arterial Blood Gas (ABG) Analysis - Metabolic + Respiratory Acidosis + Alkalosis

pH ↓ pCO2 ↓ -
Arterial Blood Gas (ABG ... Arterial #BloodGas #ABG ... #Analysis #Interpretation ... #AcidBase #Diagnosis ... #Compensation #
Blood Gas (ABG) Interpretation and Acid-Base Pathology
1- Does the patient have an acidosis or an alkalosis?
Blood Gas (ABG) ... Interpretation and ... compensation if ... MSc @AmyChung #AcidBase ... #ABG #Interpretation
Arterial Blood Gas (ABG) Interpretation
 • AG/non-AG Metabolic Acidosis
 • AG Acidosis "Delta/Delta"
 • Metabolic Alkalosis
) Interpretation ... Alkalosis • Respiratory ... Acidosis • Respiratory ... #Interpretation ... #diagnosis #acidbase
Acid Base Disorders - Blood Gas Interpretation

Steps for Blood Gas Interpretation: 
1. Acidemia or Alkalemia? 
2.
Alkalosis Step 3 - Compensation ... • Metabolic compensation ... compensation ... MDaniyalHashmi1 #AcidBase ... Acid #Base #Gas #VBG
Acid-Base Disorders - Differential Diagnosis Algorithm
Acidemia (pH < 7.35)
 • Metabolic Acidosis (HCO3 < 24mmol/L) CO2
Differential Diagnosis Algorithm ... HCO3 12:10 • Respiratory ... HCO3 7:10 • Respiratory ... < 35 mmHg) #AcidBase ... #Causes #Compensation
Prediction of Compensatory Responses on Simple Acid-Base Disturbances

#acidbase #compensation #metabolic #respiratory #diagnosis #calculations #formulas #acidosis #alkalosis
Disturbances #acidbase ... #compensation # ... metabolic #respiratory ... #calculations #formulas
Approach to Acid Base Disorders - Evaluation and Differential Diagnosis
1) Start with the Anion Gap (AG).
2)
for acid/base, a VBG ... the appropriate compensation ... done by using formulas ... retention • Respiratory ... Ventilation • Respiratory
Acid-Base Disorders - Expected Compensation Equations

Metabolic Acidosis:
 • pCO2 = 1.5 x HCO3 + 8 ±
Disorders - Expected Compensation ... ± 2 (Winter’s formula ... pCO2 ↑ 0.7 Respiratory ... #Acid #Base #AcidBase ... #Disorders #Compensation
Acid Base and Blood Gas Analysis
1. pH - What’s the primary disturbance?
2. pCO2 - What’s the
Respiratory Acidosis ... CO2 production Respiratory ... MD @nickmmark #acidbase ... #workup #algorithm ... #bloodgas #interpretation