140 tests and lab values, broken into pieces small enough to actually finish. Nothing is open until you open it — so you only ever look at one thing at a time.
Before any test happens: how specimens are handled, how you keep everyone safe, and the variables that quietly wreck a result.
FoundationsA camera on a tube. Direct eyes on the inside of the body — and the sedation, perforation and bleeding risks that come with it.
14 testsPressure measurements. Swallowing, blood vessels, bladder — anything where "how hard is it squeezing?" is the question.
5 testsInject a tracer, watch where it lands. Function imaging — it shows what an organ is *doing*, not just what it looks like.
22 testsReading the body's own electricity — heart, brain, muscle, nerve, fetus.
13 testsCultures, smears, genetic panels and tissue samples. The biggest chapter — and the one the NCLEX loves.
35 testsBlood, fat, bugs and inflammation markers in stool. Cheap, non-invasive, high-yield.
7 testsThe numbers on a lab slip. Sodium through white cells — what each one means, what moves it up, what moves it down, and when to worry.
21 topicsEvery electrolyte high and low, fluid volume deficit vs excess, and how to read an ABG in three steps.
23 topicsReading about a condition and hit a test you don't know? Every test on the site, grouped by body system and listed A–Z. This is the page to bookmark.
140 entriesEvery infographic in one scrollable page — BMP, CBC, coag, electrolytes, ABGs, ECG, GI pathology. Click to zoom.
38 visualsStandard precautions, specimen handling, patient ID, and the six variables that change a result before the lab even sees it.
Chapter 1The nursing exam almost never asks you to perform these tests. It asks what you do before (consent, NPO, allergies, baseline labs), what you watch during (sedation, vitals), and what you catch after (bleeding, perforation, respiratory depression, infection). That's the whole game.