Introduction to Arterial Blood Gases

Arterial Blood Gases,Components,normal ranges,acidosis, alkalosis,critical range

1. INTRODUCTION TO ARTERIAL BLOOD GASES Dr.Rittu Chandel Junior Clinical Biochemist Breach Candy Hospital Trust, Mumbai

2. OVERVIEW What is ABG Components of ABG

3. ARTERIAL BLOOD GAS Sample- arterial Radial Artery,Brachial Artey,Femoral Artery Blood gases explains the acid base balance,oxygenation and ventilation status Acid Base balance-pH,HCO 3 Oxygenation status-PaO 2 ,SaO 2 Ventilation-PCO 2

4. INDICATIONS Check for severe breathing problems and lung diseases, such as asthma, cystic fibrosis, or chronic obstructive pulmonary disease (COPD). See how well treatment for lung diseases is working. Find out if you need extra oxygen or help with breathing Measure the acid-base level in the blood of people who have heart failure, kidney failure, uncontrolled diabetes, sleep disorders, severe infections, or after a drug overdose.

5. PRE ANALYTICAL ERROR

6. Partial pressure of oxygen (PaO 2 )- This measures the pressure of oxygen dissolved in the blood Partial pressure of carbon dioxide ( PaCO 2 )-This measures the pressure of carbon dioxide dissolved in the blood pH- The pH measures hydrogen ions (H + ) in blood. Bicarbonate (HCO 3 ) - Bicarbonate is a chemical (buffer) that keeps the pH of blood from becoming too acidic or too basic. O 2 content measures the amount of oxygen in the blood. Oxygen saturation measures how much of the hemoglobin in the red blood cells is carrying oxygen (O 2 )

7. BLOOD GAS ANALYSIS REPORT

8. ACIDOSIS And ALKALOSIS

9. CRITICAL VALUE pH <7.25 or > 7.6 pCO 2 <20 or > 60 mmHg pO 2 <40 mmHg

10. Take home message Check the pH,pCO2,HCO3 Collection has to be proper Critical values

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