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USMLE Vault · Step 1 · Renal

Renal, Start to Finish, in 6 Days

33 First Aid pages · 11 organisms · 3 drug groups · 6 days. The first system you do, and it's free on USMLE Vault.

By Dr. Marish Asudani · Published · Updated

How do I finish the renal system for Step 1 in 6 days?

Do renal in this order over 6 days. Day 1: renal micro and pharm. Day 2 to Day 3 morning: active reading of First Aid pp. 596–628 on the First Aid Guide. Day 3 afternoon to Day 4 morning: Mehlman Medical renal videos. Day 4 afternoon: the FA Foundation Anki renal deck. Days 5–6: UWorld renal in 20-question tutor blocks with the RPSR method. Every renal page is free on USMLE Vault, and you aim for 65% or above on UWorld.

Read this first. This plan is only for you if you have roughly 10–12 hours a day for studying, and you're either an intern or a graduate. Working, with 5–8 hours a day? Keep the same order and stretch the days: Step 1 while working →
Why this page exists.
Dr. S always struggled with renal. He told me so himself. This week he sent me 2 UWorld renal blocks.
85%
Block 1 · average on that block 64%
95%
Block 2 · average on that block 62%
"I've always struggled with renal, so I'm really happy that it's becoming much clearer and easier for me to recall, and I'm seeing better scores. Your method really works and I will keep moving forward."
This is the method he used. Every step, in order.
👉 Open Renal free on usmlevault.com → First Aid Guide → Renal
Start here · before page 1

Renal: micro and pharm first

Renal starts with its own organisms and drugs: 11 organisms and 3 drug groups, the diuretics. Day 1 below does both. These are the full guides.

Microbiology Pharmacology

Renal in 6 days, hour by hour

Renal is done in 1 fixed order: the organisms and drugs first, then active reading, then active application, then active recall, and only then UWorld. Every step hits the same 33 pages of First Aid from a different angle. This is the same method I use for every system (how to study any system), and respiratory runs exactly the same way right after renal.

▶How to Do the Renal System15 minutes. Watch it once, before Day 1. It's the video the Vault schedule gives you on day 1 of renal.

Clock times assume an 11-hour day: 9 AM–1 PM, 2–6 PM and 7–10 PM, with lunch and dinner in the gaps. Shift the clock to your day. Keep the order.

Day 1 · Micro + pharmThe organisms and the drugs, from the 2 pills
9–9:15 AMWatch How to Do the Renal System, the University walkthrough.
9:15 AM–1 PMMicro: the 11 renal organisms, WRWRT. Watch, recall, watch the gaps, read the Sketchy PDF.
2–6 PMPharm: loop diuretics and thiazides, then spironolactone and the K-sparing diuretics (Sketchy). Each video twice, back to back.
7–9 PMRead the renal drugs in the High-Yield Pharmacology PDF and highlight what didn't stick. Then test: the First Aid Guide MCQs for the 11 organisms and the renal pharmacology.
Day 2 · Active readingFirst Aid Guide, page by page, MCQs on every page
9 AM–1 PMpp. 596–602 · embryology, Potter sequence, anatomy, fluid compartments, filtration barrier, clearance, GFR, filtration fraction, FeNa
2–6 PMpp. 603–611 · nephron transport, tubular defects, RAAS, kidney hormones, potassium shifts, electrolytes, acid-base, anion gap, RTA
7–10 PMpp. 612–619 · casts, nephritic vs nephrotic, each glomerular disease, stones, hydronephrosis, cystitis, pyelonephritis
Day 3 · Reading, then Mehlman
9 AM–1 PMpp. 620–628 · AKI, ATN, renal failure, cysts, renovascular disease, renal tumours, then the diuretics, ACE inhibitors and ARBs
2–6 PMWatch How to watch Mehlman Medical videos (10 minutes), then the Mehlman renal playlist from the top, in order.
7–10 PMMehlman, continued. Pause before he answers and answer it yourself.
Day 4 · Mehlman, then Anki
9 AM–1 PMFinish the Mehlman renal playlist. Any gap → that First Aid Guide page, the same day.
2–6 PMFA Foundation Anki · Renal, about 140 cards. Answer before you flip.
7–9 PMOpen the First Aid page of every card you hesitated on. Read the line and a couple above and below.
Day 5 · UWorld renalUnused · renal only · tutor mode · 20 questions a block
9–9:30 AMClear today's due FA Foundation Anki cards first.
9:30 AM–1 PMBlocks 1–2 (Qs 1–40): solve both in tutor mode, log each score, then review every bookmark in First Aid.
2–6 PMBlocks 3–4 (Qs 41–80): solve both in tutor mode, log each score, then review every bookmark in First Aid.
7–10 PMBlocks 5–6 (Qs 81–120): solve both in tutor mode, log each score, then review every bookmark in First Aid.
Day 6 · UWorld renal + the finish check
9–9:30 AMClear today's due FA Foundation Anki cards first.
9:30 AM–1 PMBlocks 7–8 (Qs 121–160): solve both in tutor mode, log each score, then review every bookmark in First Aid.
2–6 PMBlocks 9–10 (Qs 161–200): solve both in tutor mode, log each score, then review every bookmark in First Aid.
7–10 PMBlocks 11–12 (Qs 201–240): solve both in tutor mode, log each score, then review every bookmark in First Aid.
This is the RPSR method, spread over 6 days. Read = Days 2–3. Pre-solve = Days 2–4 (page MCQs, Mehlman, Anki). Solve and Review = Days 5–6. Full method: The RPSR Method.

Want a day-by-day schedule that tells you exactly what to study next? The Vault builds it around your exam date.

USMLE Vault day-by-day schedule Build my schedule →
Day 1

Micro and Pharm of renal — from the pills

Open the First Aid Guide → Renal in the Vault, free (what the First Aid Guide is). You will see 2 pills: Micro and Pharm. Each opens the exact renal list, and nothing else. Do both today.

Open Renal in the First Aid GuideFirst Aid pp. 596–628, page by page: Focus On, ELI5 and the MCQs on every page. Renal is free. Opens straight into renal.

Open Renal →
🦠
Micro · 11 organisms · the WRWRT method. Watch the sketch at 1x with no notes → Recall the whole story in your head, in order → Watch again only the gaps at 1.5–1.75x → Read the Sketchy PDF for that organism → Test with the First Aid Guide MCQs for that organism.
01 · E. coli 02 · Staph. saprophyticus 03 · Proteus mirabilis 04 · Klebsiella pneumoniae 05 · Enterococcus 06 · Pseudomonas aeruginosa 07 · Serratia marcescens 08 · Strep. agalactiae (Group B) 09 · BK virus 10 · Schistosoma haematobium 11 · Candida
Open Renal Micro → ▶How to Do Sketchy MicroThe WRWRT method on video. Watch once before the 11 organisms.
💊
Pharm · 3 drug groups · the FWRT method. Find the resource (already done: all 3 are Sketchy) → Watch each video twice, back to back → Read the High-Yield Pharmacology PDF after all 3 and highlight only what did not survive → Test in First Aid Guide → Renal → Pharmacology.
  • 01 · Loop diuretics
  • 02 · Thiazides
  • 03 · Spironolactone and the K-sparing diuretics
Open Renal Pharm → ▶How to Complete PharmacologyThe FWRT method on video. Doing pharm from videos is what makes the rest of renal easy.
Why micro and pharm first: when you reach cystitis and pyelonephritis on p. 619 and the diuretics on pp. 625–627, you meet them as old friends, not new facts. Never done Sketchy? Do the same lists from First Aid and the First Aid Guide alone. The list does not change, only the source.

Before Day 2: what the First Aid Guide is, and why you read it

First Aid was written to remind you, not to teach you. Every line assumes you already understand it. That is why students spend 3 hours on 1 page, Google half of it, and still retain nothing.

The First Aid Guide on usmlevault.com puts the teaching back into the page. Every renal page (pp. 596–628) has:

🎯
Focus On. What on this page is high-yield, and what to skip. On p. 596, the embryology timeline is low-yield; Potter sequence is the one concept that matters.
🧭
Concept Walkthrough. The page in the order you should think about it, so the box of text becomes a sequence.
🧠
ELI5. Each heading in plain English: the big idea, the story, the bridge to USMLE, and the trap the exam sets. What ELI5 is →
❓
How is this tested? Common Confusion → Core Concept → The Trap → Your Approach. See a real page →
✅
Test Yourself MCQs on that exact page. 158 MCQs across renal (as of October 2026), with a Rule-out button to practise elimination like UWorld.
Why it works: you understand the page, then prove it with MCQs in the same minute. 60–70% of UWorld traces straight back to First Aid lines, so a page you truly understood is a UWorld question you already own.
Day 2 → Day 3 morning

Active reading — First Aid pp. 596–628

This is not reading. Active reading means that for every page you explain it, understand it, and do it. You do not move to the next page until all 3 are done.

1
Read Focus On for the page. Now you know what matters.
2
Run the Concept Walkthrough and the ELI5s. Explain each heading back in your own words. If you cannot say it out loud, you have not understood it.
3
Read the actual First Aid page. It should now read like a summary of something you already know.
4
Solve the Test Yourself MCQs. This is where the knowledge gets applied. Any miss → back to that heading before you turn the page.
Pace: 10–12 minutes a page, 4–6 pages an hour. 24 pages on Day 2 and 9 on the morning of Day 3 is 1.5 honest study days, not a week. Do not memorise. Understanding is the only job on these pages.

Day 2 · pp. 596–619 · structure, physiology and glomerular disease (24 pages)

PagesTopic
596–599Embryology, Potter sequence, congenital anomalies, VUR, anatomy, fluid compartments, filtration barrier · why p. 596 takes 30 minutes, not 5 hours →
600–602Clearance, GFR, RPF, filtration fraction, FeNa, glucose clearance
603–605Nephron transport, tubular defects, PCT concentrations
606–608RAAS, JGA, kidney hormones, potassium shifts
609–611Electrolytes, acid-base, anion gap, RTA
612–616Casts, nephritic vs nephrotic, each glomerular disease, Alport, MPGN
617–619Stones, hydronephrosis, incontinence, cystitis, pyelonephritis

Day 3 morning · pp. 620–628 · kidney failure, tumours and drugs (9 pages)

PagesTopic
620–622AKI, AIN, ATN, papillary necrosis, renal failure, osteodystrophy, cysts
623–624Renovascular disease, RCC, renal tumours, bladder cancer
625–628Diuretics by site, loops, thiazides, K-sparing, ACE inhibitors, ARBs, aliskiren
🎬
A page still won't click? If the First Aid Guide page has a video, watch it first: the Guide puts the best video for the topic on the pages that need one. If it's still unclear, use 1 backup video, for that topic only: ▶Dirty Medicine · Nephrology/RenalShort, high-yield. 1 video for 1 topic. ▶Ninja Nerd · Renal MedicineLong lectures. Use only for a concept that still hasn't landed, like acid-base.
Day 3 afternoon → Day 4 morning

Active application — Mehlman Medical

You understand renal. Now learn how the exam asks it. Mehlman's renal videos take each high-yield topic and show you which clue rules an answer in, which one rules it out, and how to get from the stem to the answer.

1
Videos, not PDFs. Short ~5-minute videos. The value is the reasoning, and the PDFs do not have it.
2
The full renal playlist, in order, in 1 day. Not random clips. Watch the walkthrough in the University section of the Vault first.
3
Watch for how he thinks, not for new facts. Pause before he answers and answer it yourself. Anything that exposes a gap → open that First Aid Guide page and fix it the same day.
▶Mehlman Medical · Renal playlistWatch in order, in 1 day. Short on time? Sort by date and do the last 3 years first.
Why: active reading gave you the facts. Active application turns facts into decisions, which is the only thing a UWorld question asks for. How to use Mehlman →
Day 4 afternoon

Active recall — FA Foundation Anki, Renal

The FA Foundation Anki deck is First Aid, page by page. The Renal deck is about 140 cards (as of October 2026), 1 high-yield point per card, and the First Aid page number is on every card.

1
Run the whole Renal deck this afternoon. Answer before you flip. Recognising a line and pulling it out of memory are different skills, and UWorld tests the second one.
2
Hesitate → open the page. Go to that page number in the First Aid Guide, read the line plus a couple of lines above and below, then return to the card.
Why: this is your third full pass of renal First Aid in 4 days, and the first one done without the page in front of you. How to run the decks → · Open FA Foundation Anki in the Vault →

Run the FA Foundation Anki · Renal deckAbout 140 cards (as of October 2026), First Aid page by page, with the page number on every card. Opens straight into the deck.

Open the deck →
Days 5–6

UWorld renal — the RPSR method

Now you open UWorld. You are not meeting renal here. You are proving you already own it.

Before you open UWorld: the full UWorld protocolThe steps on this page are the short version. The full protocol is everything: the 4 days of prep before UWorld, the exact setup, what to do on every single question, how to review, and the non-negotiables. Watch the video once, then keep the written protocol open next to UWorld.

Open the full UWorld protocol →
▶How to Solve UWorld in 2026: The Entire Step 1 ProtocolThe full protocol on video. Watch it once, before your first renal block.
How to get back to it any time: open the guides menu (☰ at the top left on a phone), tap the number next to 6 UWorld, then tap The RPSR Method — How to Solve UWorld. Or go straight to drmarishasudani.com/uworld-rpsr.
SettingChoose
QuestionsUnused
SubjectsAll
SystemsRenal only
ModeTutor, untimed
Block size20 questions
S
Solve. Do 2 blocks of 20. Bookmark every question you got wrong and every one you got right by guessing. Expect about 10 bookmarks a block.
R
Review in First Aid. For each bookmark, find the exact First Aid line it came from, highlight it, and read a couple of lines around it. No more than 5–6 minutes per question. Then the next 2 blocks.
Target: 65% or above. Dr. S scored 85% and 95% on blocks where the average was 64% and 62%. If your last 2 blocks are under 60%, go back to the Mehlman videos for those topics, then the First Aid pages behind them.
Renal is finished when every renal UWorld question is attempted, every miss is traced to its First Aid page, and your last 2 blocks held above 65 to 70%. Not when a date passes. Renal has about 240 UWorld questions on the Vault schedule: 12 blocks, 6 a day on Days 5–6. Keep going until all 3 are true. When is a system actually finished? →

Later, for your NBMEs: NBME Booster Anki · RenalThe renal questions from retired NBME forms 20 to 34 and the Free 120, as cards. Not for now: open it when your NBME phase starts. What the Booster is →

Open the Booster deck →
Where this system sits

The order: easy systems first, cardio last

Renal is the 1st system. Start your systems here: renal, respiratory and GI are the easy ones, so you do them first and you don't skip them. Cardio comes last. Tap a system to open its guide.

  1. 1Renal You are here6 days · the easy one, start hereOpen →
  2. 2Respiratory6 days · same method as renalOpen →
  3. Before it: Biochem nutrition, 1 day, right before GI · where it sits
  4. 3GI7 daysOpen →
  5. 4Reproductive7 daysOpen →
  6. Before it: Biochem carb and lipid metabolism, 1 day, right before endo · where it sits
  7. 5Endocrine6 daysOpen →
  8. 6Immunology5 daysOpen →
  9. Before it: Biochem cellular, molecular and amino acids, right before heme-onc · where it sits
  10. 7Heme-onc6 daysOpen →
  11. 8MSK6 days, no dermOpen →
  12. Before it: Dermatology, 3 days, after MSK · the derm block
  13. 9Psychiatry5 daysOpen →
  14. Before it: Genetics and ANS, right before neuro · genetics
  15. 10Neurology7 daysOpen →
  16. 11Cardiovascular7 days · always lastOpen →

Biochem is never a block of its own: each piece sits right before the system that needs it. The whole method, once: how to study any system →

What not to do

Do not open UWorld on Day 1. You will score 40%, decide you are bad at renal, and you are simply in the wrong order.
Do not read First Aid to memorise it. The reading days are for understanding. Memory is the Anki step's job.
Do not skip the page MCQs. If you cannot answer them, you read the page. You did not learn it.
Do not split renal across weeks. 6 days in a row. A half-done system behaves like an undone one.
Read next.
→ What the Guide contains: What Is the First Aid Guide.
→ One renal page, opened up: Inside a First Aid Guide Page (p. 596).
→ The same loop for every system: How to Actually Complete First Aid.
→ Every system's micro and pharm: System Guides.
→ The full UWorld method: The RPSR Method.
→ The method behind every system: How to study any system · next system: Respiratory in 6 days.
Renal is free. Start with the system you fear most.
33 pages · 158 MCQs (as of October 2026) · ELI5 and walkthroughs on every page · the Micro and Pharm pills.
Open Renal free →
usmlevault.com · First Aid Guide → Renal
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