27 results
Acid Base Disorders - Blood Gas Interpretation

Steps for Blood Gas Interpretation: 
1. Acidemia or Alkalemia? 
2.
Differentials? ... 35-45 mmHg • PaO2 ... • Metabolic compensation ... • Respiratory compensation ... MDaniyalHashmi1 #AcidBase
Arterial Blood Gas (ABG) Analysis - Metabolic + Respiratory Acidosis + Alkalosis

pH ↓ pCO2 ↓ -
Alkalosis pH ↓ pCO2 ... acidosis pH ↑ pCO2 ... alkalosis pH ↑ pCO2 ... Interpretation #AcidBase ... #Diagnosis #Compensation
Acid Base Compensation - Directions - If all three variables (pH, HCO2, pCO2) move in the
Acid Base Compensation ... variables (pH, HCO2, pCO2 ... Diagnosis #Nephro #AcidBase ... #Respiratory #Compensation
Acid-Base Disorders - Differential Diagnosis Algorithm
Acidemia (pH < 7.35)
 • Metabolic Acidosis (HCO3 < 24mmol/L) CO2
Acid-Base Disorders - Differential ... Respiratory Acidosis (pCO2 ... < 35 mmHg) #AcidBase ... #Disorders #Differential ... Algorithm #Causes #Compensation
PLACO Mnemonic - Approach to Acid-Base Disorders
P - Determine the pH
L - Labs: PCO2 & HCO3
A
pH L - Labs: PCO2 ... Anion Gap C - Compensation ... jadav_md #PLACO #AcidBase
Hypoxia and Hypoxemia - Overview
Hypoxia - insufficient oxygen delivered to tissues to meet demands
Hypoxemia - low
O2 is inspired) PAO2 ... Low SvO2 → Low PaO2 ... Low SvO2 → Low PaO2 ... sepsis) - High PaO2 ... summary #pulmonary #differential
Acid Base Disorders - Formulas for appropriate metabolic and respiratory compensation

- Dr Amith Sreedharan - Consultant
and respiratory compensation ... Acidosis #Alkalosis #Compensation ... Diagnosis #Nephrology #AcidBase
Blood Gas (ABG) Interpretation and Acid-Base Pathology
1- Does the patient have an acidosis or an alkalosis?
- Is there any compensation ... is no metabolic compensation ... either partial compensation ... appropriate respiratory compensation ... MSc @AmyChung #AcidBase
Approach to the A-a Gradient
A-a gradient = PAO2 - PaO2
A-a gradient = [FiO2 x (Patm -
A-a gradient = PAO2 ... - PaO2 A-a gradient ... /0.8)] - PaO2 Simplified ... /0.8)] - PaO2 Normal ... Hypoxia #hypoxemia #differential
Acid-Base Disorders - Expected Compensation Equations

Metabolic Acidosis:
 • pCO2 = 1.5 x HCO3 + 8 ±
Disorders - Expected Compensation ... Acidosis: • pCO2 ... ∆ HCO3 ↓ 1 → ∆ pCO2 ... #Acid #Base #AcidBase ... #Disorders #Compensation