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Acid Base Disorders - Formulas for appropriate metabolic and respiratory compensation

- Dr Amith Sreedharan - Consultant
Acid Base Disorders ... - Formulas for ... metabolic and respiratory ... #Compensation #Formula ... Diagnosis #Nephrology #AcidBase
Summary of metabolic compensation for respiratory acid-base disorders
#Diagnosis #Nephro #Respiratory #Acidosis #Alkalosis #Metabolic #Compensation #Formulas #Curbsiders
compensation for respiratory ... acid-base disorders ... Diagnosis #Nephro #Respiratory ... #Compensation #Formulas
Prediction of Compensatory Responses on Simple Acid-Base Disturbances

#acidbase #compensation #metabolic #respiratory #diagnosis #calculations #formulas #acidosis #alkalosis
on Simple Acid-Base ... Disturbances #acidbase ... compensation #metabolic #respiratory ... #calculations #formulas
Respiratory Acid-Base Disorders - Diagnosis Algorithm

#Respiratory #AcidBase #Disorders #Diagnosis #Algorithm #Pulmonary #Acidosis #Alkalosis
Respiratory Acid-Base ... Disorders - Diagnosis Algorithm ... #Respiratory ... #AcidBase #Disorders ... #Diagnosis #Algorithm
Acid-Base Disorders - Differential Diagnosis Algorithm
Acidemia (pH < 7.35)
 • Metabolic Acidosis (HCO3 < 24mmol/L) CO2
Acid-Base Disorders ... Differential Diagnosis Algorithm ... HCO3 12:10 • Respiratory ... HCO3 7:10 • Respiratory ... < 35 mmHg) #AcidBase
Acid-Base Disorders - Expected Compensation Equations

Metabolic Acidosis:
 • pCO2 = 1.5 x HCO3 + 8 ±
Acid-Base Disorders ... ± 2 (Winter’s formula ... pCO2 ↑ 0.7 Respiratory ... ↓ 4 #Acid #Base ... #AcidBase #Disorders
Acid Base and Blood Gas Analysis
1. pH - What’s the primary disturbance?
2. pCO2 - What’s the
Acid Base and Blood ... Respiratory Acidosis ... CO2 production Respiratory ... MD @nickmmark #acidbase ... #workup #algorithm
Approach to Acid Base Disorders - Evaluation and Differential Diagnosis
1) Start with the Anion Gap (AG).
2)
Approach to Acid Base ... than expected based ... done by using formulas ... retention • Respiratory ... Ventilation • Respiratory
USMLE Epidemiology and Biostatistics Summary
Meta-Analysis: pools data from several studies (greater power), limited by quality/bias of
systematic error Correlation ... perfect positive correlation ... perfect negative correlation ... , 0 = no correlation ... Biostatistics #formulas
Perform computations online at:
ScyMed.com
6th ED
ICU-card
«ICU, Formulas & Drugs»
HEMODYNAMIC PATTERNS
Condition
SAP
CVP

PAP PCWP

CO C(a-v)02 PVR

SVR
Hypovolemic shock
↓
↓
↓
↓
↓
↑
↑
↑
Cardiogenic shock
↓
1
↑
1

1
↑

Septic shock
↓
↓
↓
↓
↑
↓
↓
↓
Cardiac Tamponade
.
↑
↑
1
↓

→
↑
RV
ICU-card «ICU, Formulas ... Q-T interval correction ... min 400-600 mL Respiratory ... = >60% Forced Espiratory ... ratio Respiratory