A 12-year-old girl is brought to the ER after falling and hurting her arm. She's tachycardic and tachypneic. While waiting to be seen by the doctor, she becomes increasingly hysterical and is now experiencing muscle cramps, tingling, and parasthesia. Measurement of ABG shows: PH 7.5, PaO2 115 mm Hg. PaCO2 29 mm Hg, and HCO3 24 mmol/L. your ABG interpretation is uncompensated:
سؤال مجاني 7 من 10 اليوم · اشترك وكمّل بدون حد
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الإجابة: C. Respiratory alkalosis
pH 7.5 (alkalemia) with a low PaCO2 (29) and a normal HCO3 (24) is a primary respiratory alkalosis with no metabolic compensation yet, so it is uncompensated. It is caused by anxiety/pain-driven hyperventilation, and the tingling and cramps come from alkalosis-related hypocalcemia. Metabolic alkalosis would need a raised HCO3.
- المصدر
- ABG & A-a gradient.pdf · p. 2
Step Up To Medicine 6th Edition 2024 (Acid-base imbalance).pdf · p. 5 - المحاضرة
- Acid-base · General Surgery · Module D
- ظهر في
- Surgery QB (Module D) p. 234 Q87