Learn how medical assistants collect, recognize, document, and respond to vital signs and basic patient assessment findings.
⏱️ 60–90 minutesSelf-paced lesson
⭐ 250 XPEarned after passing
🩺 BadgeVital Signs Specialist
✅ Passing Score80% or higher
Module Progress0%
Learning Objectives
Identify the primary vital signs and explain why each matters.
Recognize common adult reference ranges and abnormal findings.
Describe correct measurement techniques.
Identify findings that require prompt escalation.
Document vital signs clearly and accurately.
Apply assessment skills to common clinical scenarios.
What You Will Practice
Temperature
Pulse and heart rate
Respiratory rate
Blood pressure
Oxygen saturation
Pain assessment
Clinical documentation
Lesson 4.1
Introduction to Vital Signs
Vital signs provide a quick picture of how the body is functioning. They are often collected at the beginning of a visit and may reveal illness, distress, deterioration, or the need for immediate attention.
TemperatureBody heat regulation
PulseHeart rate and rhythm
RespirationsBreathing rate and effort
Blood PressureForce against artery walls
SpO₂Estimated oxygen saturation
PainPatient-reported symptom
Clinical Pearl: A single abnormal number matters, but the full pattern matters more. Always consider symptoms, trends, medications, and the patient's baseline.
Mark this lesson complete when you are ready to continue.
Lesson 4.2
Temperature
Temperature reflects the balance between heat production and heat loss. It may vary based on age, time of day, activity, illness, measurement site, and the device used.
Typical Adult RangeAbout 97°F–99°F
Fever100.4°F (38°C) or higher
HypothermiaBelow 95°F (35°C)
Common Measurement Sites
Site
Key Consideration
Oral
Avoid immediately after hot or cold drinks, smoking, or chewing gum.
Tympanic
Correct probe placement is essential.
Temporal
Keep the sensor in contact with the skin and follow device instructions.
Axillary
Often less precise than oral or rectal readings.
Rectal
Often closest to core temperature but not appropriate for every patient.
Safety Check: Use the correct probe cover, follow infection-control procedures, and document the measurement site.
Temperature technique completed.
Lesson 4.3
Pulse and Heart Rate
The pulse is the pressure wave created when the heart contracts. When assessing a pulse, consider the rate, rhythm, and strength.
Typical Adult60–100 beats/minute
BradycardiaBelow 60 beats/minute
TachycardiaAbove 100 beats/minute
Common Pulse Sites
Radial: wrist; commonly used for routine assessment.
Brachial: inner arm; often used for blood pressure and infants.
Carotid: neck; used in urgent situations.
Apical: heard over the heart with a stethoscope.
Femoral: groin.
Dorsalis pedis: top of the foot.
Factors That May Raise the Pulse: exercise, fever, pain, anxiety, dehydration, blood loss, and some medications.
Clinical Pearl: Count for a full minute when the rhythm is irregular, the rate is unusually fast or slow, or the patient is symptomatic.
Pulse assessment completed.
Lesson 4.4
Respiratory Rate
Respiratory rate is the number of breaths taken in one minute. Observe the rate, rhythm, depth, effort, and any abnormal sounds or visible distress.
Typical Adult12–20 breaths/minute
BradypneaBelow 12 breaths/minute
TachypneaAbove 20 breaths/minute
Clinical Pearl: Count respirations without announcing that you are doing so. Patients may unconsciously change their breathing pattern when they know it is being observed.
Warning Signs
Use of accessory muscles
Difficulty speaking in full sentences
Blue or gray lips
Sudden confusion
Very slow, shallow, or irregular breathing
Respiratory assessment completed.
Lesson 4.5
Blood Pressure
Blood pressure measures the force of blood against artery walls. The top number is systolic pressure, and the bottom number is diastolic pressure.
Category
Systolic
Diastolic
Normal
Less than 120
Less than 80
Elevated
120–129
Less than 80
Stage 1 Hypertension
130–139
80–89
Stage 2 Hypertension
140 or higher
90 or higher
Correct Technique
Allow the patient to rest before measurement when practical.
Seat the patient with back supported and feet flat.
Place the arm at heart level.
Use the correct cuff size.
Place the cuff on bare skin.
Ask the patient not to talk during measurement.
Repeat an unexpected reading according to office policy.
Common Error: A cuff that is too small may produce a falsely high reading. A cuff that is too large may produce a falsely low reading.
Clinical Scenario
A patient reports dizziness. Blood pressure is 84/58 mmHg and pulse is 122 beats/minute.
Best response: Keep the patient safe, do not allow unassisted standing, and promptly notify the appropriate clinical professional.
Blood pressure assessment completed.
Lesson 4.6
Oxygen Saturation
Pulse oximetry estimates the percentage of hemoglobin carrying oxygen. The result is written as SpO₂.
Common Adult Range95%–100%
Potential ConcernBelow 92%, depending on the patient
Ways to Improve Accuracy
Warm cold fingers.
Reduce movement.
Remove or avoid dark nail polish when it interferes.
Check that the sensor is placed correctly.
Compare the pulse displayed on the device with the patient's actual pulse.
Important: Some patients with chronic lung disease may have a lower prescribed baseline. Evaluate the reading together with symptoms, history, and provider instructions.
Oxygen saturation assessment completed.
Lesson 4.7
Pain Assessment
Pain is subjective. The patient's report is the primary source of information. Use a consistent scale and ask focused questions.
Memory Tool: OPQRST
O – Onset
P – Provocation or palliation
Q – Quality
R – Region or radiation
S – Severity
T – Timing
A 0–10 scale is commonly used, but the method should match the patient's age, communication ability, and condition.
Clinical Pearl: Document the patient's own description whenever possible rather than replacing it with your interpretation.
Pain assessment completed.
Lesson 4.8
Documentation and Escalation
Documentation should be accurate, timely, objective, and complete. Record the values, units, measurement site when relevant, oxygen delivery status, and any symptoms or actions taken.
Example Documentation
BP 118/76 mmHg, right arm, seated
HR 74 beats/minute, regular
RR 16 breaths/minute, unlabored
Temp 98.4°F oral
SpO₂ 98% on room air
Pain 2/10, aching, left shoulder
Escalate Promptly When You Observe
Severe breathing difficulty
Very low oxygen saturation with symptoms
Chest pain or sudden neurologic changes
Marked hypotension with dizziness or weakness
Very high blood pressure with concerning symptoms
Sudden confusion, fainting, or rapid deterioration
Scope Reminder: Medical assistants collect and communicate findings. They should follow office policy and promptly report abnormal or concerning results to the appropriate licensed professional.
Documentation and escalation completed.
Module 4 Final Quiz
Answer all 15 questions. A score of 80% or higher unlocks 250 XP and the Vital Signs Specialist badge.
Your Result
Module Achievement
🩺
Vital Signs Specialist
Pass the final quiz with 80% or higher to unlock this badge and earn 250 XP.