Question

Arterial Blood Gas Interpretation Posttest Directions: Complete this test using the answer sheet provided The solution that would be most alkalotic would be the one with a pH of: A. Four Seven C. Nine Fourteen D. A. The normal pH range for blood is: 7.0 - 7.25 B. 7.30 - 7.40 C. 7.35 -7.45 D. 7.45 - 7.55 The respiratory system compensates for changes in the pH level by responding to changes in the levels of: A. CO2 B. H0 C. H2CO3 D. HCO3 The kidneys compensate for acid-base imbalances by excreting or retaining: A. Hydrogen ions B. Carbonic acid C. Sodium Bicarbonate Water All of the following might be a cause of respiratory acidosis except: A. Sedation B. Head trauma c. COPD D. Hyperventilation A patient with a prolonged episode of nausea, vomiting and diarrhea has an ABG ordered on admission. You might expect the results to show: A Metabolic acidosis B. Metabolic alkalosis C. Respiratory acidosis D. Respiratory alkalotic A calculated ABG value that indicates excess or insufficiency of sodium bicarbonate in the system is: A. HCO B. Base excess C. PaO2 D. pH Page 22

Answer 1

1. The Bolutiom that would be most alkalotic Wo uld be the ene with PH ofi vans - ti Fourteen (NOrmal PH range is between oto 14' PH 7 is -neitsal , PH-14-most alkaline ) of pH hes blood. 2. The Normal range eâns: 7-35 to 7:45 3. The respirabory System compensates for changes in the PH lEvel by sesponding sto changes in the level of Ans -CO2 CThe normal response of the respiratozy System to elevated PH is to incrcase the ahorint COz in the blood Tate to consexve Cos) by decrcasing the yespirakorg 4- The kidny compentate fos acid-bace imbalancer by excreting or Ans 9 sodium u bicarbonate CRenal compensation foy respiratory acidosis is crhanad by sodium bicoubonate "reabsosption & new bicourbonate generation in the distal nephron) relaining.

ednswess : Hyperventilation CHperventilation causes Co2 levels in the blood to"fall below normal levels ) 5. 6. Metabolic acidosis (Vomiting 9 nausea X diarihea Occuss as a result of gastňosintenstinal bicarbonate loss) 7. Base excess CIt es the amo unt of acid reguired to restore a litre of blood to its nomal pH at a PacO2 oA H0 mmHg.) The base excess increases in metabolic atkalosis e dicreass in metabolie acrolosis ) 8. eall of the above (edll" conditions can be reasons for ABG anakysis 9o Respirakory (Becanse s levels ase altering) gases L0 In the same disection