208 results
Acid Base Disorders - Blood Gas Interpretation

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

pH ↓ pCO2 ↓ -
Arterial Blood Gas (ABG ... acidosis pH ↑ pCO2 ... Arterial #BloodGas #ABG ... Interpretation #AcidBase ... #Diagnosis #Compensation
Hypoxia and Hypoxemia - Overview
Hypoxia - insufficient oxygen delivered to tissues to meet demands
Hypoxemia - low
O2 is inspired) PAO2 ... blood (measured on ABG ... Low SvO2 → Low PaO2 ... sepsis) - High PaO2 ... #differential #diagnosis
ABG vs VBG: Arterial vs Venous Blood Gases

ABG
PROS: Tells you exactly what the arterial environment looks
ABG vs VBG: Arterial ... looks like (pH, PaCO2 ... serial exams #ABG ... Comparison #pH #pCO2 ... #Diagnosis #Differences
Arterial Blood Gas (ABG) Interpretation
 • AG/non-AG Metabolic Acidosis
 • AG Acidosis "Delta/Delta"
 • Metabolic Alkalosis
Arterial Blood Gas (ABG ... Acidosis • AG ... Arterial #BloodGas #ABG ... Interpretation #diagnosis ... #acidbase #acidosis
What's in a Blood Gas? VBG vs ABG

BOTTOM LINE: VBG is less painful, more easily obtained
VBG vs ABG BOTTOM ... obtained than ABG ... #EBM #Diagnosis ... #ABG #VBG #Differences ... Comparison #PH #PCO2
Markers of Organ Dysfunction in Severe Sepsis 
Altered consciousness 
Confusion 
Psychosis 

Tachycardia 
Hypotension 
Altered CVP 
Altered
Altered CVP Altered PAOP ... Tachypnoea PaO2 ... 90% PaO2/FiO2 300% ... Protein C #Diagnosis ... #CriticalCare #Diagnosis
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 ... #differential #diagnosis
Blood Gas (ABG) Interpretation and Acid-Base Pathology
1- Does the patient have an acidosis or an alkalosis?
Blood Gas (ABG) ... Look at the pCO2 ... MSc @AmyChung #AcidBase ... #ABG #Interpretation ... Acidosis #Alkalosis #Diagnosis
Acid-Base Disorders - Differential Diagnosis Algorithm
Acidemia (pH < 7.35)
 • Metabolic Acidosis (HCO3 < 24mmol/L) CO2
- Differential Diagnosis ... Respiratory Acidosis (pCO2 ... Respiratory Alkalosis (pCO2 ... < 35 mmHg) #AcidBase ... #Differential #Diagnosis