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Prevention

How to measure vital signs correctly

Practical steps for more reliable measurements and avoiding common mistakes with home devices.

Illustration of an upper-arm blood pressure monitor and cuff

Key points

  • Rest before taking a measurement.
  • Use properly functioning equipment.
  • Record the date, time, reading, and any symptoms.

Blood pressure

  • Avoid exercise, tobacco, and caffeine for 30 minutes beforehand; empty your bladder and rest seated for at least five minutes.
  • Support your back, keep your feet flat on the floor, do not cross your legs, and rest your arm at heart level.
  • Place a correctly sized upper-arm cuff against bare skin. Take two measurements one minute apart.

Pulse and breathing

  • To check your pulse, place your index and middle fingers on your wrist and count for 60 seconds if the rhythm is irregular.
  • To check breathing, remain at rest and count how many times the chest rises during one minute.
  • Note fever, pain, anxiety, recent exercise, or medications that may affect the reading.

Temperature and pulse oximeter

  • Use the same measurement method when comparing temperatures and clean the thermometer as directed.
  • When using a pulse oximeter, rest, warm your hand, remove nail polish, and wait for the reading to stabilize.
  • Movement, poor circulation, nail polish, and low-quality devices can cause inaccurate readings.

Warning signs and when to seek care

  • A very abnormal reading together with chest pain
  • Shortness of breath
  • Fainting
  • Confusion
  • Bluish skin or lips

What not to do

  • Do not measure blood pressure over clothing.
  • Do not adjust treatment on your own.
  • Do not rely on an unstable reading.

Medical references

American Heart Association — Home monitoring MedlinePlus — Pulse

If you have symptoms, risk factors, or questions about your situation, arrange a professional medical assessment.

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