7.3 Pulse Measurement

CNA Certified Nursing Assistant

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1 Introduction to the CNA Exam

1.1 About the CNA Certification Exam 1.2 Exam Content Areas 1.3 Clinical Skills Evaluation 1.4 How to Use This Course

2 Role and Responsibilities

2.1 CNA Scope of Practice 2.2 The Healthcare Team 2.3 Delegation and Supervision 2.4 Documentation and Reporting 2.5 Time Management and Organization 2.6 Professionalism and Work Ethics

3 Communication and Interpersonal Skills

3.1 Verbal Communication 3.2 Nonverbal Communication 3.3 Active Listening 3.4 Communication with Special Needs Patients 3.5 Cultural Sensitivity and Diversity 3.6 Handling Difficult Communication Situations

4 Infection Control

4.1 Chain of Infection 4.2 Hand Hygiene 4.3 Personal Protective Equipment (PPE) 4.4 Standard Precautions 4.5 Transmission-Based Precautions 4.6 Cleaning, Disinfection, and Sterilization

5 Safety and Emergency Procedures

5.1 Fall Prevention 5.2 Fire Safety 5.3 Body Mechanics and Safe Lifting 5.4 Restraints and Alternatives 5.5 Emergency Response Procedures 5.6 Disaster Preparedness

6 Personal Care Skills

6.1 Bathing and Showering 6.2 Oral Hygiene and Denture Care 6.3 Hair Care, Grooming, and Shaving 6.4 Dressing and Undressing 6.5 Perineal Care 6.6 Toileting and Incontinence Care

7 Basic Nursing Skills

7.1 Vital Signs Overview 7.2 Temperature Measurement 7.3 Pulse Measurement 7.4 Respirations Measurement 7.5 Blood Pressure Measurement 7.6 Positioning, Transfers, and Mobility

8 Mental Health and Cognitive Care

8.1 Understanding Dementia 8.2 Communication with Dementia Residents 8.3 Dementia Care Strategies 8.4 Depression and Anxiety in the Elderly 8.5 Abuse Recognition and Reporting

9 Legal and Ethical Considerations

9.1 Residents' Rights 9.2 HIPAA and Confidentiality 9.3 Advance Directives and End-of-Life Care 9.4 CNA Scope of Practice 9.5 Ethical Principles in Healthcare 9.6 Documentation and Reporting

7.3 Pulse Measurement

Key Takeaways Explain This Topic AI

Normal adult pulse is 60-100 beats per minute; assess rate, rhythm, and strength

Use the first two or three fingers, never the thumb, which has its own pulse

Radial (wrist) is the routine site; apical (chest, counted 60 seconds) is the most accurate

Count a full 60 seconds for any irregular pulse and before giving digoxin

• A pulse deficit (apical higher than radial) means some beats are too weak to reach the wrist; report it
• Last updated: June 2026

What the Pulse Tells You

The pulse is the wave of blood pushed through the arteries each time the heart's left ventricle contracts. Every pulse check assesses three things, not just a number.

• Characteristic What to Note
• Rate Beats per minute (normal adult 60-100)
• Rhythm Regular (even spacing) or irregular
• Strength / quality Bounding (too strong), normal, or thready (weak)
• Pulse Sites

• Site Location Typical Use
• Radial Thumb side of the wrist Routine adult measurement
• Apical Left chest, 5th intercostal space, midclavicular line Most accurate; irregular pulse, before digoxin
• Brachial Inner elbow (antecubital) Blood pressure; infant pulse
• Carotid Side of the neck Emergencies, unresponsive patient
• Femoral Groin Emergencies, circulation check
• Pedal (dorsalis pedis) Top of the foot Lower-limb circulation
• Taking a Radial Pulse

Wash hands, rest the patient's arm with the palm down, and place your first two or three fingers over the radial artery. Press gently until you feel the beat. If the rhythm is regular you may count 30 seconds and multiply by 2; if it is irregular, count the full 60 seconds . On the NNAAP skills exam your count must land within about +/- 4 beats of the evaluator's, so do not round.

Why never the thumb: your thumb carries its own arterial pulse, so you could count your heartbeat instead of the patient's.

• Apical Pulse, Pulse Deficit, and Abnormalities
• Apical Pulse

The apical pulse is heard directly over the heart with a stethoscope and is the most accurate count. Locate the point of maximum impulse (PMI) at the 5th intercostal space, midclavicular line on the left chest. Warm and clean the diaphragm, then count for the full 60 seconds .

Use the apical site when:

• The radial pulse felt irregular
• The patient takes cardiac drugs, especially digoxin (the nurse often wants an apical rate before a dose)
• The patient is an infant or young child
• Maximum accuracy is required
• Pulse Deficit

Two staff count at the same time, one apical and one radial. If the apical rate is higher, the difference is the pulse deficit , meaning some heartbeats are too weak to push blood all the way to the wrist.

• Measurement Example
• Apical pulse 92
• Radial pulse 84
• Pulse deficit 8

A pulse deficit always gets reported to the nurse.

Naming Abnormal Pulses

• Term Meaning
• Tachycardia Rate above 100 bpm
• Bradycardia Rate below 60 bpm
• Arrhythmia / dysrhythmia Irregular rhythm
• Bounding Abnormally strong, easily felt
• Thready Weak, faint, hard to feel
• What Moves the Pulse

• Raises Pulse Lowers Pulse
• Exercise, fever, pain Rest and sleep
• Anxiety, dehydration, blood loss Athletic conditioning
• Stimulant medications Beta-blockers, hypothermia

Documentation examples: "Radial pulse 78, regular, strong." "Apical pulse 84, irregular, nurse notified." "Pedal pulses present bilaterally, weak on left." Always pair the number with rhythm and strength rather than a bare figure.

• Counting Method, Peripheral Pulses, and Test Scenarios
• How Long to Count

The counting window is itself a tested decision. For a regular pulse you may count for 30 seconds and multiply by 2, which still meets the NNAAP tolerance of about plus or minus 4 beats. For any irregular pulse, an infant, or a pre-digoxin check, count the full 60 seconds , because doubling a short count of an uneven rhythm magnifies the error. A frequent written-test trap offers "count 15 seconds and multiply by 4"; that shortcut is too inaccurate for nursing assistants and is the wrong answer.

Why Peripheral Pulses Are Checked

The pedal (dorsalis pedis) and posterior tibial pulses are felt in the feet to confirm that blood is reaching the lower limbs. A weak or absent foot pulse, especially in a diabetic resident or someone with peripheral vascular disease, is reported because it can signal poor circulation that leads to slow wound healing and skin breakdown. You document them as present or absent and as equal or unequal between the two feet.

Worked Scenario

A CNA counts a radial pulse and feels an occasional skipped beat. The correct sequence is: do not estimate, switch to a full 60-second count , and because the rhythm is irregular move to or request an apical assessment for accuracy, then report "irregular pulse, rate 88 apical" to the nurse. The CNA does not decide whether the irregularity is dangerous; that is the nurse's call.

Quality Words You Must Know

Use precise terms so the nurse understands what you felt. A bounding pulse is unusually forceful and may accompany fever, anxiety, or fluid overload. A thready pulse is faint and easily lost under your fingers and may accompany shock, dehydration, or blood loss. Reporting "thready, rapid pulse" alongside pale, cool, clammy skin is a classic early warning of shock that the nurse needs immediately. Never normalize an abnormal feel; describe exactly what you assessed in rate, rhythm, and strength.