Nephrology Masterclass: 15 High-Yield MCQs

15 high-yield, single-best-response MCQs covering the kidney and its electrolytes end to end — the potassium that is already on the ECG, the potassium that is not, the sodium that is seizing, SIADH as a diagnosis of exclusion, the AKI that needs a machine, the triple whammy, the toxic alcohol, hypercalcaemia of malignancy, post-thyroidectomy tetany, hypernatraemia and its correction ceiling, childhood nephrotic syndrome, post-streptococcal nephritis, IgA nephropathy, anti-GBM disease and the creatinine rise an ACE inhibitor is supposed to cause. Every question closes with a one-line rule you can carry into the exam, and the outro replays all fifteen. Every question is checked against a named primary source — UKKA, MHRA, KDIGO, NICE and the European hyponatraemia guideline — and printed on screen beneath the rationale, so you can verify the claim rather than take it on trust. Where teaching has moved under the author, this video teaches the current guideline and names the retired version: the reflex to stop an ACE inhibitor on any creatinine rise, the habit of correcting sodium quickly, and the belief that a normal ECG means the potassium needs no membrane protection. Pause on each question, lock your answer before the 6-second timer ends, then read the trap rationale, its source, and the "why the other three are wrong" mini-lesson. TIMESTAMPS & CHAPTERS: 00:00 - Intro: The 15-Question Nephrology Drill 00:35 - Q1 [HYPERKALAEMIA]: ECG CHANGES 01:48 - Q2 [HYPERKALAEMIA]: NORMAL ECG 02:59 - Q3 [HYPONATRAEMIA]: SEIZURE 04:09 - Q4 [SIADH]: DIAGNOSIS 05:27 - Q5 [ACUTE KIDNEY INJURY]: DIALYSIS INDICATION 06:51 - Q6 [ACUTE KIDNEY INJURY]: THE TRIPLE WHAMMY 08:02 - Q7 [ACID-BASE]: HIGH ANION GAP 09:15 - Q8 [HYPERCALCAEMIA]: MALIGNANCY 10:23 - Q9 [HYPOCALCAEMIA]: POST-THYROIDECTOMY 11:33 - Q10 [HYPERNATRAEMIA]: WATER DEFICIT 12:38 - Q11 [NEPHROTIC SYNDROME]: CHILDHOOD 13:51 - Q12 [GLOMERULONEPHRITIS]: POST-STREPTOCOCCAL 15:01 - Q13 [HAEMATURIA]: SYNPHARYNGITIC 16:14 - Q14 [RAPIDLY PROGRESSIVE GN]: ANTI-GBM 17:24 - Q15 [CHRONIC KIDNEY DISEASE]: ACE INHIBITOR 18:34 - Outro: Scorecard & The 15 Rules