01
What the two numbers actually are
Blood pressure is two numbers because your heart does two things: it squeezes, then it rests. Each number is the pressure during one of those.
Top number · the bigger one
Systolic
The pressure while the heart squeezes blood out.
Manual cuff: the FIRST clear tap you hear.
Bottom number · the smaller one
Diastolic
The pressure while the heart rests between beats.
Manual cuff: where the tapping STOPS.
118 / 76
Written like a fraction. Said out loud as "118 over 76."
"Squeeze over rest."
Three words. If you remember nothing else, remember which number is which.
The numbers to know cold
Normal adult range: 90/60 to 119/79.
Tell the nurse if it's 140/90 or higher, or below 90/60.
These are written-test answers too, not just skills-lab numbers. Learn them once and they pay twice.
Your job is measure and report
You never decide a number is "fine." You never interpret what it means. And you never, ever guess one. A blood pressure you invented is a lie in a medical record — a blood pressure you retook is just good practice.
02
The manual method, nine steps
This is the class version, with a cuff and a stethoscope. Steps 7 and 8 are the whole skill — the other seven just set them up.
- 01Wash your hands and explain what you're doing. Sit the resident with her back supported and legs uncrossed. Her arm supported at heart level, palm up, sleeve out of the way — bare arm, or one thin layer.
- 02Put on the right-size cuff, fully deflated, snug, about one inch above the elbow crease, with the cuff's arrow pointing at the brachial artery — the pulse in the crease of the elbow, on the inner side, closest to the body.
- 03Find that brachial pulse with your fingertips before you put the stethoscope down. Feel it first, then listen there.
- 04Earpieces pointing forward into your ears. Diaphragm flat and firm over the brachial pulse — firm, not mashed into the arm.
- 05Close the valve, just snug. Inflate to the number your class teaches — commonly 160 to 180, or 30 above where the radial pulse disappears.
- 06Open the valve a hair. Let the needle fall 2 to 4 marks per second. Slow is accurate. Dumping the air out is the number one beginner mistake.
- 07The first moment that mattersThe first clear tapping sound you hear is the SYSTOLIC — the top number. Note where the needle is the instant tapping starts.
- 08The second moment that mattersKeep listening as it falls. The taps get softer, then stop. The point where the sound disappears is the DIASTOLIC — the bottom number.
- 09Let it deflate all the way, take the cuff off, and record both numbers as even numbers — the gauge is marked in twos — like 118/76. Report it if it's outside the normal range.
"First sound top. Last sound bottom."
Say it until it's annoying. This is the sentence that turns the noise into a reading.
03
The mistakes everyone makes first
Every one of these is normal on day one. Name them now so you catch yourself doing them instead of wondering why the number came out strange.
- Deflating too fast. The sounds fly past before you can place the needle. This is the big one.
- Re-pumping halfway down. If you lose it, don't pump back up. Deflate fully, wait about a minute, start over.
- A loose cuff, or a cuff over a bulky sleeve. Both give you a number that isn't real.
- The arm dangling below the heart. Reads falsely high. Support it at heart level.
- Pressing the diaphragm too hard. It distorts the sounds. Firm and flat, not buried.
- Counting the first faint whoosh instead of the first clear tap.
- Guessing. If you didn't hear it, you didn't hear it. The professional move is "I'd like to retake that" — every time, in class and on the floor.
Four things to have in your head
"Squeeze over rest." — which number is which.
"First sound top, last sound bottom." — how to read them.
"Let it fall 2 to 4." — how fast to deflate.
"Under 200 on the pump; write what the screen says." — the electronic cuff on test day.
04
Ear trainer
You can't practise hearing without hearing something. This plays the taps for you and drops a needle in real time — no cuff, no partner, no equipment. Watch the needle, listen for the first tap and the last tap, then type what you got.
Press Start. The needle falls; the taps begin partway down.
No readings yet today.
Turn the silent switch off and the volume up.
How to use this
Do ten. Then do ten more tomorrow. You're not trying to be perfect — you're trying to make "first tap / last tap" feel automatic before you're standing in front of an instructor. Passing here is within 4 of the real number on each, which is the same tolerance a real check uses.
The real thing is slower and quieter than this, and a real arm has a pulse you can feel. But the shape of it — taps start, taps soften, taps stop — is exactly the same.
05
Fifteen questions
Tap an answer and you'll find out immediately whether it's right, plus why. Read the explanation even when you get it right — that's where the reasoning locks in.