1 / 30

Respiratory Care

Respiratory Care. Arterial Blood Gas Interpretation. Reference – Egan’s Fundamentals of Respiratory Care 8 th Edition. Normal Values for ABG. pH = 7.40 pCO 2 = 40 mmHg pO 2 = 90 mmHg Bicarb = 24 mEq/L Base Excess = 0 mEq/L S a O 2 = >90%. Normal Ranges. pH = 7.35 – 7.45

murray
Télécharger la présentation

Respiratory Care

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Respiratory Care Arterial Blood Gas Interpretation Reference – Egan’s Fundamentals of Respiratory Care 8th Edition

  2. Normal Values for ABG • pH = 7.40 • pCO2 = 40 mmHg • pO2 = 90 mmHg • Bicarb = 24 mEq/L • Base Excess = 0 mEq/L • SaO2 = >90%

  3. Normal Ranges • pH = 7.35 – 7.45 • pCO2 = 35 - 45 mmHg • pO2* = 80 – 100 mmHg • Bicarb = 22 - 26 mEq/L • Base Excess = 0 + 2 mEq/L • SaO2 = 90 – 100% *Normal pO2 levels decrease naturally due to age. One mmHG for each year over 60 is considered normal.

  4. 5 “types” of classification • Respiratory acidosis • Respiratory alkalosis • Metabolic acidosis • Metabolic alkalosis • Mixed state (both respiratory and metabolic involvement)

  5. Interpreting an ABG • Divided into 2 basic steps • Interpretation of the acid-base status • Interpretation of the oxygenation status

  6. Acid-Base Classification • Inspect the pH (acidemia, alkalemia, or normal) • Inspect the pCO2 (respiratory component) • Inspect the HCO3- (metabolic component) • Check for compensation

  7. Step 1 • Categorize the pH • < 7.35 = acidosis • > 7.45 = alkalosis

  8. Step 2 • Determine respiratory involvement • pCO2 is the indicator of respiratory involvement • Determine if pCO2 could have caused the abnormality by itself • If pCO2 is normal, probably metabolic

  9. Step 3 • Determine Metabolic Involvement • HCO3- is the indicator of metabolic involvement • Determine if HCO3- could have caused the abnormality by itself • If HCO3- is normal, probably respiratory

  10. Step 4 • Assess for compensation • The system NOT responsible for the imbalance usually attempts to return the pH to normal • 3 levels • Compensated (chronic) • Uncompensated (acute) • Partially Compensated

  11. Step 4 continued • In cases in which compensation has occurred (but the pH is still above/below 7.40) the component which would cause the change is generally the primary cause

  12. Oxygenation Status – pO2/SaO2 • pO2 < 80 = mild hypoxemia • pO2 < 60 = moderate hypoxemia • pO2 < 40 = severe hypoxemia • SaO2 represents the degree to which the hemoglobin is saturated with O2. • 40-50-60 70-80-90 theory • pO2 to saturation match

  13. Quick guide ↑ → ↓

  14. Respiratory Acidosis

  15. Respiratory Acidosis Example

  16. Respiratory Alkalosis

  17. Respiratory Alkalosis Example

  18. Metabolic Acidosis

  19. Metabolic Acidosis Example

  20. Metabolic Alkalosis

  21. Metabolic Alkalosis Example

  22. Let’s Do a Few

  23. pH pCO2 pO2 HCO3- SaO2 7.40 41 85 24 95 ?????

  24. pH pCO2 pO2 HCO3- SaO2 7.29 57 64 24 91 ?????

  25. pH pCO2 pO2 HCO3- SaO2 7.11 18 116 15 99 ?????

  26. pH pCO2 pO2 HCO3- SaO2 7.39 62 79 35 95 ?????

  27. pH pCO2 pO2 HCO3- SaO2 7.36 71 55 32 90 ?????

  28. pH pCO2 pO2 HCO3- SaO2 7.58 15 101 24 98 ?????

  29. pH pCO2 pO2 HCO3- SaO2 7.55 40 85 34 97 ?????

  30. pH pCO2 pO2 HCO3- SaO2 7.25 65 80 19 97 ?????

More Related