Approach to hypokalemia
- Urine K/Cr ratio > 1.5 = renal loss
- 注意上下的單位要一樣,Urine K 是 mmol/L,而 Urine Cr 是 mg/dl,則所除之比值要 x1000/88 = x11 才是單位相同時的比值
- TLDR: 如果是豪莫/豪克 → x 11
吃不好、transcellular shift? : Urine K
- 都不是或不確定:驗個 urine K
- levels >10 mmol/L suggest renal potassium loss
- levels >15 mmol/day suggest renal potassium loss
- 分 renal or extrarenal potassium loss