NCMA Patient Intake and Vital Signs Measurement 2 — Questions and Answers

Question 1: What is the normal adult respiratory rate range?

12–20 breaths per minute (Correct answer)
6–10 breaths per minute
24–30 breaths per minute
35–40 breaths per minute

Correct answer: 12–20 breaths per minute

A normal adult respiratory rate (eupnea) is 12–20 breaths per minute at rest; rates below 12 (bradypnea) or above 20 (tachypnea) at rest warrant clinical evaluation.

Medical assistants should count respiratory rate covertly (while appearing to continue taking the pulse) because patients unconsciously alter their breathing when aware of observation. Count chest rises for a full 60 seconds for accuracy, or 30 seconds and multiply by 2 if the rate is regular. Note depth (shallow, normal, deep) and pattern (regular, irregular). Abnormal patterns include: Cheyne-Stokes (crescendo-decrescendo cycles with apnea — seen in heart failure, brain injury), Kussmaul (deep, rapid, labored — seen in metabolic acidosis/DKA), and Biot's (irregular clusters with apnea — seen in brainstem injury).

Question 2: A medical assistant takes a patient's blood pressure and obtains a reading of 145/92 mmHg. According to the 2017 ACC/AHA guidelines, how would this reading be classified?

Stage 2 hypertension (Correct answer)
Normal blood pressure
Elevated blood pressure
Stage 1 hypertension

Correct answer: Stage 2 hypertension

According to the 2017 ACC/AHA guidelines, Stage 2 hypertension is defined as systolic ≥140 mmHg or diastolic ≥90 mmHg; a reading of 145/92 meets both criteria.

2017 ACC/AHA BP classification: Normal (<120/<80), Elevated (120–129/<80), Stage 1 HTN (130–139 or 80–89), Stage 2 HTN (≥140 or ≥90), Hypertensive crisis (>180/>120). For a 145/92 reading, both systolic (145≥140) and diastolic (92≥90) qualify for Stage 2. Medical assistants should take at least two readings 1–2 minutes apart and document both. If elevated, notify the provider. Patients should have been seated, arm at heart level, feet flat, no smoking/caffeine/exercise for 30 minutes prior to measurement.

Question 3: When measuring oral temperature, how long after a patient drinks a hot or cold beverage should the medical assistant wait before taking an oral temperature?

15–30 minutes (Correct answer)
2–5 minutes
1 hour
No waiting period is needed

Correct answer: 15–30 minutes

The medical assistant should wait 15–30 minutes after a patient consumes hot or cold food or beverages before taking an oral temperature, as residual temperature effects in the oral cavity can falsely elevate or lower the reading.

Similarly, oral temperature measurement should be delayed after smoking (15–30 minutes) or vigorous mouth breathing. Patients who cannot close their lips around the thermometer (e.g., due to nasal obstruction, confusion, or age) should have an alternative route used (tympanic, temporal, axillary, or rectal). The oral probe must be placed in the posterior sublingual pocket (under the tongue to the side) where lingual arteries provide the most accurate core temperature reflection.

Question 4: What is the correct technique for measuring orthostatic (postural) blood pressure?

Measure BP in supine position, then after patient stands for 1–3 minutes; a drop of ≥20 mmHg systolic or ≥10 mmHg diastolic indicates orthostatic hypotension (Correct answer)
Measure BP only in standing position
Take three readings in sitting position 5 minutes apart
Measure BP after vigorous exercise and compare to resting value

Correct answer: Measure BP in supine position, then after patient stands for 1–3 minutes; a drop of ≥20 mmHg systolic or ≥10 mmHg diastolic indicates orthostatic hypotension

Orthostatic hypotension is assessed by measuring BP and heart rate supine, then after standing 1–3 minutes; a ≥20 mmHg drop in systolic or ≥10 mmHg drop in diastolic, often with symptoms (dizziness, lightheadedness), defines orthostatic hypotension.

Orthostatic hypotension is common in elderly patients, those with dehydration, autonomic neuropathy (diabetes, Parkinson's), or on antihypertensive medications. The medical assistant should document each position, the time stood, and whether symptoms occurred. A significant drop without symptoms may still require clinical follow-up. Many falls in elderly patients are attributable to unrecognized orthostatic hypotension. Always assist the patient when standing during this test to prevent fall-related injury.

Question 5: What information should be gathered during patient intake prior to the provider entering the examination room?

Chief complaint, current medications, allergies, vital signs, reason for visit, and any relevant history updates since the last visit (Correct answer)
Only the patient's name and insurance information
Only vital signs — no history questions
Insurance verification and payment collection only

Correct answer: Chief complaint, current medications, allergies, vital signs, reason for visit, and any relevant history updates since the last visit

Comprehensive patient intake includes: chief complaint (reason for visit in the patient's own words), medication reconciliation, allergy review, vital signs, pain assessment, and updating any pertinent history — preparing the provider with complete information before entering the room.

During intake, the medical assistant should: (1) greet the patient and confirm identity, (2) document the chief complaint verbatim, (3) reconcile current medication list (name, dose, frequency, route) and verify allergies (substance + reaction type), (4) measure and document vital signs (BP, HR, RR, temperature, SpO2, height, weight, BMI), (5) complete pain assessment (0–10 scale, location, character, onset, duration, radiation, alleviating/aggravating factors), and (6) update family and social history as directed by facility protocol. All findings are documented in the EHR before the provider enters.

Question 6: What is the normal range for oxygen saturation (SpO2) measured by pulse oximetry in a healthy adult?

95–100% (Correct answer)
85–90%
88–92%
70–80%

Correct answer: 95–100%

Normal pulse oximetry SpO2 in a healthy adult at sea level is 95–100%; values below 95% may indicate hypoxemia and should be reported to the provider, while values below 90% are generally considered clinically significant.

Pulse oximetry measures the percentage of hemoglobin saturated with oxygen using spectrophotometry (red and infrared light absorption). Limitations: inaccurate with nail polish (especially dark colors), poor peripheral perfusion, severe anemia, carbon monoxide poisoning (CarboxyHb reads as OxyHb), and motion artifact. Remove nail polish or use the finger side if polish cannot be removed. Patients with COPD may have baseline SpO2 of 88–92% and should not be targeted for correction to >95% without provider guidance (hypercapnic drive). Document SpO2 along with whether the patient is on supplemental oxygen and the flow rate.

NCMA Patient Intake and Vital Signs Measurement 2

What is the normal adult respiratory rate range?