Clinical Skills · General Survey, Anthropometric Measurement, and Vital Signs
Respiration
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In 30 seconds
Respiration, as a vital sign, is the measurement and description of a person's breathing. One breath is one inhalation plus one exhalation; the respiratory rate Number of breaths (inhalation + exhalation) per minute. Full entry → is breaths per minute. A good respiratory assessment is more than a count: the nurse also evaluates the depth of each breath, the rhythm (regular or irregular), and the effort it takes to breathe.
Two closely related words are worth separating. ventilation The movement of air in and out of the lungs. Full entry → is the mechanical movement of air into and out of the lungs — the physical act counted at the bedside. Respiration in the strict sense is gas exchange: oxygen entering the blood and carbon dioxide leaving it across the alveolar–capillary membrane. The vital sign measures ventilation; gas-exchange adequacy is judged with pulse oximetry, blood gas results, and the person's overall appearance. A person can breathe at a normal rate and still have poor gas exchange, or the reverse.
Measuring respiration seems simple: watch the chest rise and fall, count, record. In practice, accuracy depends on technique, and interpretation depends on what is normal for that person.
Why this matters
Changes in breathing are frequently among the earliest detectable signs that a person's condition is deteriorating — a principle behind the early warning score systems used in many hospitals. A rising rate, a new irregularity, or sudden use of accessory muscles Neck, shoulder, and chest muscles recruited to help with breathing. Full entry → can appear before other vital signs change.
Respiration is also the vital sign most easily altered by the act of measuring it: people who know they are being counted often change their breathing, which is why counting unobtrusively is a core skill. Accurate baseline data give the care team a reference for judging stability.
The college version
Core Concepts
Ventilation versus gas exchange
Ventilation moves air; gas exchange transfers oxygen and carbon dioxide. The bedside vital sign reflects ventilation. If the chest rises and falls but gas exchange is failing (for example, because of fluid in the lungs or a blocked airway), the person may still be in trouble despite a "normal" rate. That is why nurses interpret the rate together with the person's color, level of consciousness, pulse oximetry, and reported breathing comfort — one number cannot confirm that a person is breathing well.
Rate, depth, and rhythm
Rate. Count breaths for 30 seconds and multiply by 2, or count a full 60 seconds when the rhythm is irregular, the person is an infant, or the rate is abnormal. A commonly taught resting adult range is about 12–20 breaths per minute, but normal varies with age (infants breathe much faster) and with conditioning, illness, and medications — always verify against your institution's reference values. A rate above expected is tachypnea Breathing faster than expected for the person's age and condition. Full entry →; below expected is bradypnea Breathing slower than expected. Full entry →; a pause or absence of breathing is apnea A pause or absence of breathing. Full entry →, which is reportable and potentially an emergency.
Depth. Breaths may be shallow or deep. Deep, rapid breathing (hyperpnea) moves more air; shallow breathing moves less. Depth is described qualitatively at the bedside ("shallow," "deep," "normal") unless a device measures tidal volume.
Rhythm. Breathing is normally regular. An irregular pattern, a long pause after exhalation, or gradually deepening then shallower breaths (Cheyne–Stokes breathing) is significant and should be documented and reported; irregularity is one reason to count a full minute.
Effort and work of breathing
Healthy breathing is quiet and effortless. Increased work of breathing shows up as observable cues: use of accessory muscles (neck and shoulder muscles lifting the chest), intercostal retractions (skin pulling between the ribs), nasal flaring, pursed-lip breathing, or an inability to speak in full sentences. A person who cannot breathe comfortably lying flat (orthopnea Difficulty breathing while lying flat, relieved by sitting up. Full entry →) may sit upright or lean forward — the "tripod" position. These cues matter more than the rate alone.
Measuring and documenting: technique matters
The classic technique is to measure respiration immediately after counting the pulse, keeping fingers on the wrist as if still counting, so the person does not realize their breathing is being observed. Watch the chest (or abdomen in infants) rise and fall for 30 seconds; count a full minute if the rhythm is irregular or accuracy is critical. Record both the count and the pattern — for example, "RR 18, regular, unlabored" or "RR 28, shallow, with accessory muscle use." Abnormal findings are rechecked against baseline and reported per institutional policy. Exactly who may measure, interpret, and act on vital signs varies by jurisdiction, facility, and role — know your scope.
Factors that change breathing
Pain, fever, and some illnesses; it falls during sleep and with certain medications (for example, opioids can slow breathing). Smoking, altitude, respiratory conditions, pregnancy, and body position also alter baseline.
Common Confusions
| Do Not Confuse | With | Difference |
|---|---|---|
| Tachypnea | Dyspnea | Tachypnea is a measured rate; dyspnea is the person's subjective feeling of breathlessness. A person can have either without the other. |
| Ventilation | Respiration (gas exchange) | Ventilation moves air; respiration exchanges gases. The vital sign counts ventilation. |
| Apnea | A slow or shallow pattern | Apnea is a pause or absence of breathing; bradypnea is a reduced rate and hypopnea is shallow breathing — different findings. |
| A 15-second count × 4 | A full-minute count | Short counts multiply small errors and miss irregular rhythms; count a full minute when accuracy matters. |
| A normal SpO₂ reading | Adequate ventilation | Pulse oximetry reflects oxygenation, not rate, depth, rhythm, or effort — a person can desaturate late or have an SpO₂ affected by other factors. |
Eli explains
The same idea, in plain words
Explain it like I’m 10
Breathing is how your body takes in fresh air and blows out used air. Counting breaths tells the nurse how fast someone's breathing machine is running, and watching closely shows whether it's running smoothly or the person is working hard. It's a free clue your body gives every few seconds, and nurses learn to sneak a peek so you don't change your breathing on purpose.
Worked example
Ms. Rivera, a 68-year-old person recovering from abdominal surgery, is resting in bed. The nurse takes her radial pulse, keeps two fingers on her wrist, and quietly counts 11 chest rises in 30 seconds — a rate of 22. Because the pauses between breaths are uneven, the nurse counts a full minute: 24 breaths, irregular, with noticeable pauses. The nurse also notices her neck muscles tightening with each inhalation and that she chooses to sit propped upright.
Comparing this with her baseline of 16 regular, unlabored breaths an hour earlier, the nurse documents "RR 24, irregular, shallow, with accessory muscle use; person reports shortness of breath," and notifies the care team per institutional policy while positioning Ms. Rivera upright. (Educational illustration: specific interventions follow orders, policy, and scope of practice.) The key point is that the count (24) was only one piece of the assessment — the irregular rhythm, shallow depth, and visible effort made the finding concerning.
Key takeaways
- One breath = one inhalation + one exhalation; respiratory rate is breaths per minute.
- Assess four things: rate, depth, rhythm, and effort — not just the count.
- Count unobtrusively (right after the pulse, fingers still on the wrist); count a full 60 seconds when the rhythm is irregular.
- A commonly taught resting adult range is ~12–20 breaths/min, but normal varies by age and condition — verify institutional reference values.
- Tachypnea = faster than expected; bradypnea = slower; apnea = pause/absence of breathing (report immediately).
- Dyspnea is subjective — the person's report of breathlessness — while rate and effort are objective observations.
- Changes in breathing are often early signs of deterioration; recheck and report abnormal findings per policy.
- Pulse oximetry (SpO₂) complements respiratory assessment but does not replace counting and describing breathing.
Check yourself
5 review questions from the chapter. Try each one, then open the answer.
What four components should be described when assessing respiration?
Show answer
Rate, depth, rhythm, and effort (work of breathing).
Why do nurses count respirations right after taking the pulse, without telling the person?
Show answer
So the person does not consciously change their breathing pattern, which would make the count inaccurate.
When should the nurse count respirations for a full 60 seconds?
Show answer
When the rhythm is irregular, when the person is an infant, or whenever accuracy is critical (such as an abnormal or borderline rate).
Mr. Chen's respiratory rate is 26 breaths per minute. He tells the nurse, "I can't catch my breath." Which finding is the objective one, and which is subjective?
Show answer
The rate of 26 is the objective observation; "I can't catch my breath" is the subjective report of dyspnea.
A person's breathing is described as "using accessory muscles and sitting upright to breathe." What does this tell you beyond the rate?
Show answer
It signals increased work of breathing — the person is struggling to breathe even if the rate is within range, which warrants rechecking, documentation, and reporting per policy.
Study tools & related lessonsKey vocabulary · Related
Key vocabulary
- respiration (gas exchange)
- The transfer of oxygen and carbon dioxide in the lungs and at the cellular level.
- ventilation
- The movement of air in and out of the lungs.
- respiratory rate
- Number of breaths (inhalation + exhalation) per minute.
- eupnea
- Normal, quiet, effortless breathing.
- tachypnea
- Breathing faster than expected for the person's age and condition.
- bradypnea
- Breathing slower than expected.
- dyspnea
- The subjective feeling of difficult or labored breathing.
- orthopnea
- Difficulty breathing while lying flat, relieved by sitting up.
- accessory muscles
- Neck, shoulder, and chest muscles recruited to help with breathing.
- apnea
- A pause or absence of breathing.
Sources & references
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