ABG Interpretation Questions and Answers 100% Pass

ABG Interpretation Questions and Answers 100% Pass Which blood gas measurement assesses the efficiency of a patient's lung ventilation? PaCO2 Which blood gas measurement gauges the extent of tissue oxygenation? PvO2: Typically ranges between 35 - 45 mmHg. A decreased PvO2 indicates insufficient oxygenation of tissues, often due to reduced cardiac output. When cardiac output declines, blood flow to tissues slows, while tissue oxygen uptake remains unchanged. Consequently, some tissues extract more oxygen from the blood than usual, leading to reduced oxygen levels in returning blood, reflected by a decrease in PvO2. A patient using an aerosol mask set at 40% oxygen pH 7.42, PaCO2 36, PaO2 122, HCO3 What is the A-a gradient? PB = 747 PAO2 = (PB - 47)FiO2 - (PaCO2 * 1.25) A-a Shortcut for PAO2 = (7 * O2%) - (PaCO2 + 10) (700 * 0.40) - (36 + 10) = 234 A-a = 234 - 122 = 112 Which condition shifts the HbO2 dissociation curve to the right? Hypercapnia A patient on 2 lpm via NC needs to interpret the following ABG results: pH 7.51, PaCO2 27, PaO2 62, HCO3 23 Acute respiratory alkalosis The Respiratory Care Practitioner (RCP) received an order for ABG levels from a patient, but an Allen test indicates no collateral circulation in the right wrist. At this time, what should the RCP do? Confirm collateral circulation in the left wrist. Interpret the ABG results: pH 7.21 PaCO2 43 PaO2 81 HCO3 14 Uncompensated (acute) metabolic acidosis with normal oxygenation Interpret the ABG results: pH 7.36 PaCO2 62 PaO2 58 HCO3 36 Compensated respiratory acidosis with moderate hypoxemia Interpret the ABG results: pH 7.57 PaCO2 27 PaO2 89 HCO3 24 Uncompensated respiratory alkalosis with normal oxygenation Interpret the ABG results: pH 7.22 PaCO2 51 PaO2 71 HCO3 17 Combined acidemia with moderate oxygenation Interpret ABG pH 7.44