5.4 Vital Signs, Measurements, and Technical Procedures
Key Takeaways
- Normal adult resting ranges: temperature about 97.8–99 F, pulse 60–100 bpm, respirations 12–20 breaths/min, blood pressure under 120/80, and oxygen saturation 95–100%.
- Accurate measurement depends on the correct site, equipment, cuff size, resident position, timing, and comparison with the resident's baseline.
- Count an irregular pulse or abnormal respirations for a full minute, and count respirations without telling the resident so the pattern stays natural.
- The aide performs only delegated, trained, policy-allowed technical tasks and never inserts catheters, gives medication, or adjusts oxygen flow.
- Report abnormal values, values that do not match the resident's symptoms, an inability to complete a task, and any change from baseline.
Normal Vital Sign Ranges to Memorize
Vital signs are clinical information, not numbers to fill into a chart. They help the nurse detect infection, dehydration, bleeding, fluid overload, respiratory distress, and medication effects. The exam expects you to know the normal adult resting ranges and recognize when a value falls outside them.
Normal Adult Vital Signs
| Vital sign | Normal resting range | Report when |
|---|---|---|
| Temperature | About 97.8–99.0 F (36.5–37.2 C) oral | Fever 100.4 F or higher, or unusually low |
| Pulse (heart rate) | 60–100 beats per minute | Below 60, above 100, irregular, or very weak |
| Respirations | 12–20 breaths per minute | Below 12, above 20, labored, noisy, or shallow |
| Blood pressure | Below 120/80 mmHg (normal) | Sustained 140/90 or higher, or sudden drop |
| Oxygen saturation | 95–100% on room air | Below 92%, or any reading with distress |
These numbers anchor most measurement questions. A pulse of 110 at rest, respirations of 8, a blood pressure of 88/50 with dizziness, or an oxygen saturation of 88% are all reportable. But the resident's baseline matters: a pulse of 96 may be normal for one resident after activity and unusual for another at rest, and a low-grade temperature may be meaningful in a resident who usually runs low.
Measuring Accurately
Accuracy starts with preparation: identify the resident, explain the task, provide privacy, perform hand hygiene, use clean equipment, and check the care plan. Position the resident correctly and allow rest if the measurement requires resting conditions.
Key technique points the exam tests:
- Pulse: palpate with the fingertips, never the thumb (the thumb has its own pulse). Count an irregular pulse for a full minute.
- Respirations: count without telling the resident, because awareness changes the breathing pattern; observe rate, depth, and effort, counting a full minute if irregular.
- Blood pressure: use the correct cuff size (a cuff too small reads falsely high), support the arm at heart level, and do not take it over clothing or on an arm with an IV, dialysis access, or injury.
- Temperature: use the correct route and a clean probe cover; wait the required time after hot or cold fluids for an oral reading.
- Weight: weigh at the same time of day on the same scale with similar clothing, and report a sudden gain (possible fluid retention) or loss.
- Intake and output (I&O): measure actual amounts in milliliters; report poor intake, vomiting, diarrhea, blood, or very low urine output.
- Pain: pain is sometimes called the "fifth vital sign"; record the resident's own rating, location, and what eases or worsens it, and report new or worsening pain.
A quick conversion to know for I&O is that 1 ounce equals about 30 milliliters, so an 8-ounce cup of juice the resident finishes is recorded as roughly 240 mL. Estimate meal intake as the percentage eaten when assigned, and total fluids at the end of the shift if your facility requires it. Empty graduated containers at eye level on a flat surface for an accurate reading.
When a number seems wrong, check technique and symptoms before recording. If an automatic blood pressure reading is extreme but the cuff is over clothing or the resident is moving, correct the technique and recheck if policy allows. Still report the value if it remains abnormal or the resident has symptoms. Never alter a number to look normal, copy yesterday's value, or record an estimate as measured.
Technical Procedures Within Scope
Technical procedures vary by facility and state rule, so the aide stays inside training and delegation. A Washington NAC may be assigned to take vital signs, measure height and weight, record intake and output, collect routine urine or stool specimens, empty a drainage bag, apply non-sterile gloves and PPE, and assist with oxygen-tubing safety. The aide does not insert urinary catheters, perform sterile technique, give medication, adjust oxygen flow rate, change sterile dressings, irrigate tubes, or make treatment decisions.
Specimen routines require identity and cleanliness. Label after collection according to policy, keep the specimen free of toilet water and tissue, and deliver it promptly. A specimen that is unlabeled, contaminated, taken from the wrong resident, or left too long may be unusable, so the aide reports the problem rather than guessing or hiding it.
Oxygen safety is a special focus because oxygen feeds fire. The aide keeps oxygen tubing untangled and off the floor, checks that the prescribed flow on the flowmeter has not changed, posts "oxygen in use" signage per policy, and keeps flames, smoking, and electrical sparks away from the resident. If the tubing is kinked or the resident reports shortness of breath, the aide reports to the nurse rather than turning the dial.
A critical exam pattern: symptoms can outrank a device reading. If a pulse oximeter reads 98% but the resident is gasping, pale, and cannot speak in full sentences, the aide reports the respiratory distress immediately and treats the reading as just one piece of information, never adjusting oxygen independently. A cold finger, nail polish, or poor circulation can also make an oximeter read inaccurately, which is another reason the resident's overall appearance matters more than a single number.
In every measurement scenario, the best answer combines accurate technique, resident safety, scope boundaries, and timely reporting of facts to the nurse.
Which set of values is within the normal resting range for a healthy adult?
A nurse aide takes a resident's pulse and notices it is irregular. What should the aide do?
When counting a resident's respirations, why should the nurse aide avoid telling the resident the breaths are being counted?