ABG Interpretation questions with complete solutions 2023/2024

ABG Interpretation questions with complete solutions 2023/2024 The following blood gas measurements determines how well a patients lungs are being ventilated. - correct answer PaCO2 The following blood gas measurements determines the level of tissue oxygenation. - correct answer PvO2: Normal value 35 - 45 mmHg. A decreased PvO2 indicates inadequate oxygenation of the tissues most commonly caused by a decreased cardiac output. As cardiac output drops, blood flow to the tissues slows while tissue oxygen uptake remains at the same rate. Therefore, some tissues take more oxygen from the blood than normal, which deprives other tissues of the normal amount of oxygen. When the blood returns from the body to the pulmonary artery, it contains less oxygen that it should and is reflected by a drop 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 - correct answer 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 The following conditions shifts the HbO2 dissociation curve to the right? - correct answer Hypercapnia Patient on 2 lpm via NC has the interpret the following ABG results pH 7.51, PaCO2 27, PaO2 62, HCO3 23 - correct answer Acute respiratory alkalosis The RCP has received an order to obtain ABG levels from a patient, but an Allen test indicates collateral circulation is not present in the right wrist. At this time the RCP would - correct answer Check collateral circulation in the left wrist. Interpret ABG pH 7.21 PaCO2 43 PaO2 81 HCO3 14 - correct answer Uncompensated (acute) metabolic acidosis with normal oxygenation