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Acid Base Disorders - Formulas for appropriate metabolic and respiratory compensation

- Dr Amith Sreedharan - Consultant
Acid Base Disorders ... - Formulas for ... #Compensation #Formula ... Diagnosis #Nephrology #AcidBase
Prediction of Compensatory Responses on Simple Acid-Base Disturbances

#acidbase #compensation #metabolic #respiratory #diagnosis #calculations #formulas #acidosis #alkalosis
on Simple Acid-Base ... Disturbances #acidbase ... respiratory #diagnosis #calculations ... #formulas #acidosis
Acid-Base Disorders - Differential Diagnosis Algorithm
Acidemia (pH < 7.35)
 • Metabolic Acidosis (HCO3 < 24mmol/L) CO2
Acid-Base Disorders ... - Differential ... Diagnosis Algorithm ... < 35 mmHg) #AcidBase ... #Diagnosis #Algorithm
Table 1. Equations for estimated glomerular filtration rate (eGFR) in adults based on serum creatinine concentration*.
#Diagnosis
eGFR) in adults based ... EGFR #Equations #Calculation ... #Formulas #Creatinine
Approach to Acid Base Disorders - Evaluation and Differential Diagnosis
1) Start with the Anion Gap (AG).
2)
Approach to Acid Base ... Evaluation and Differential ... done by using formulas ... Differential Diagnosis ... Evaluation #workup #Differential
Sensitivity is the proportion of truly diseased persons in the screened population who are identified as
correctly diagnose a case ... that any given case ... NegativePredictiveValue #Calculation ... Table #PPV #NPV #Formulas
Acid-Base Disorders - Expected Compensation Equations

Metabolic Acidosis:
 • pCO2 = 1.5 x HCO3 + 8 ±
Acid-Base Disorders ... ± 2 (Winter’s formula ... ↓ 4 #Acid #Base ... #AcidBase #Disorders
USMLE Epidemiology and Biostatistics Summary
Meta-Analysis: pools data from several studies (greater power), limited by quality/bias of
cause-effect Case ... prove causation Case ... NPV Odds ratio (case ... Biostatistics #formulas ... #calculations #