How to Measure Respiration Rate Accurately

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How to Measure Respiration Rate Accurately

By Your Health Magazine Health Information Team

To measure respiration accurately, have the person rest quietly, watch the chest or abdomen rise and fall, and count each complete rise-and-fall cycle as one breath. Count for a full 60 seconds and record the result as breaths per minute. Also note whether the breathing is regular, unusually shallow or deep, noisy, or difficult.

How to Measure Respiration Step by Step

1. Let the person rest. They should sit or lie comfortably for several minutes. Do not measure immediately after exercise, climbing stairs, smoking, or another activity that changes breathing.
2. Use a timer. A clock with a second hand or a phone timer works well.
3. Watch the chest or abdomen. One breath includes one inhalation and one exhalation. Count one complete rise and fall as a single breath.
4. Count for 60 seconds. A full-minute count is especially important when breathing is slow, fast, shallow, or irregular. Although counting for 30 seconds and multiplying by two provides an estimate, it can miss irregular patterns.
5. Record the result. Write down the number of breaths per minute, the time, whether the person was resting, and any symptoms or unusual breathing patterns.

The basic method is also described in this Johns Hopkins Medicine guide to respiration rate and other vital signs.

Tips for Getting a More Accurate Result

People may breathe differently when they know someone is counting. If appropriate, begin observing respirations immediately after checking the person’s pulse, while keeping your fingers near the wrist. Do not ask the person to take deep breaths or deliberately control their breathing.

• Measure while the person is calm and physically still.
• Count without talking to the person during the measurement.
• Make sure clothing or blankets do not hide chest or abdominal movement.
• If movement is difficult to see, place a hand lightly on your own chest when measuring yourself. When observing someone else, ask permission before touching them.
• Repeat the measurement after several minutes if the result seems unexpected.
• Whenever possible, measure under similar conditions each time so that readings are easier to compare.

Careful technique matters for any home health measurement. The same principle applies when reading small medication volumes, as explained in this guide to accurately measuring 0.25 mL on a 1 mL syringe.

What Else Should You Observe?

A respiratory assessment includes more than a number. Watch the person’s overall breathing pattern and appearance while counting.

Do not rely on the respiratory rate alone to decide whether someone is well. A person can have a rate within a typical range and still experience serious breathing difficulty.

What Is a Normal Respiration Rate?

For a healthy adult at rest, commonly cited normal ranges are approximately 12 to 20 breaths per minute. Individual references use slightly different limits. For example, MedlinePlus information about vital signs lists 12 to 18 breaths per minute for the average healthy resting adult.

A single reading outside a general range does not identify a cause or establish a diagnosis. The person’s age, usual baseline, symptoms, health conditions, and circumstances all matter. Children normally breathe faster than adults, with expected rates changing considerably by age. When measuring an infant, watch the abdomen as well as the chest and count for the full minute. Ask a pediatric healthcare professional how to interpret a child’s result rather than applying adult ranges.

For someone with a chronic heart or lung condition, the most useful comparison may be with their usual resting rate and the action plan provided by their healthcare team.

What Can Change the Breathing Rate?

Respiration may temporarily become faster after physical activity or during anxiety, pain, fever, or emotional stress. Illnesses affecting the lungs, heart, metabolism, or nervous system can also change the rate or effort of breathing. Sleep and certain medicines may slow breathing.

If a reading is unexpected, allow the person to remain at rest and measure again. Record relevant details, including recent exercise, fever, pain, symptoms, and medication use. Do not change a prescription medicine based only on a home respiratory-rate measurement; contact the prescribing healthcare professional for guidance.

Respiratory Rate Is Not the Same as Oxygen Saturation

Respiratory rate counts how often someone breathes. Oxygen saturation estimates the percentage of hemoglobin carrying oxygen and is commonly measured with a pulse oximeter. A standard pulse oximeter also displays pulse rate, but it may not measure respiratory rate.

These measurements provide different information. A person may be breathing rapidly despite an apparently acceptable oxygen reading, or may have breathing difficulty before a home device shows a major change. Symptoms and visible breathing effort should never be dismissed because of one device reading.

When to Seek Care

Call 911 for severe or rapidly worsening breathing difficulty, gasping, blue or gray lips or skin, fainting, confusion, chest pain or pressure, or an inability to stay awake. The American Lung Association provides additional guidance on warning signs associated with shortness of breath.

Contact a primary care professional promptly if the resting respiratory rate remains unusually fast or slow, differs substantially from the person’s normal rate, or occurs with fever, cough, wheezing, dizziness, unusual fatigue, or worsening shortness of breath. A pediatrician should evaluate concerning breathing changes in a child, particularly when the child is feeding poorly, unusually sleepy, or visibly working harder to breathe.

Keeping a dated record can help a healthcare professional interpret changes over time. For additional reliable consumer health information, explore the National Library of Medicine’s MedlinePlus health topics. Home respiratory measurements are useful for observation, but they do not replace a professional examination when symptoms are concerning.