Your Complete BLS Pre-Course Study Guide: Essential Skills for Life-Saving Certification

Comprehensive Preparation Resource by Pulse CPR and First Aid School – Martinez, GA | (706) 901-7277

Master BLS Skills Before Your Certification Course

Basic Life Support (BLS) certification is one of the most valuable skills you can learn, whether you’re a healthcare professional, first responder, or someone who wants to be prepared for emergencies. This comprehensive study guide covers all the essential knowledge you’ll need to succeed in your BLS certification class and confidently perform life-saving techniques when they matter most.

The American Heart Association’s BLS course trains participants to promptly recognize life-threatening emergencies, deliver high-quality chest compressions, provide appropriate ventilations, and use an AED effectively. These core skills form the foundation of emergency response and could mean the difference between life and death in a cardiac arrest situation.

Who Needs BLS Certification?

BLS certification is required for healthcare providers including nurses, doctors, EMTs, paramedics, dental professionals, physical therapists, and healthcare support staff. It’s also valuable for childcare providers, fitness trainers, coaches, teachers, and anyone who wants comprehensive life-saving skills. Many employers require current BLS certification as a condition of employment.

Adult CPR: The Foundation of Basic Life Support

Recognizing Cardiac Arrest

The first critical step in any emergency response is proper assessment. You must quickly and accurately determine if someone needs CPR by systematically checking for responsiveness and normal breathing.

Check for Responsiveness:

Tap the person’s shoulders firmly while shouting “Are you okay?”
Look for any verbal response, movement, or eye opening
If unresponsive, immediately call 911 or have someone else call

Assess Breathing:

Look for normal chest rise and fall for no more than 10 seconds
Listen for breath sounds
Abnormal gasping or agonal breathing is NOT normal breathing
If no normal breathing is present, begin CPR immediately

Pulse Check (Healthcare Providers Only):

Check the carotid pulse for no more than 10 seconds
Locate pulse by placing fingers on the side of the neck, next to the windpipe
If no pulse is felt or you’re uncertain, begin CPR immediately
Lay rescuers should NOT check for pulse – start CPR if victim is unresponsive and not breathing normally

High-Quality Adult CPR Technique

Proper Hand Placement:

Place the heel of one hand on the lower half of the breastbone (sternum)
Place your other hand on top, interlacing your fingers
Keep your arms straight and position your shoulders directly over your hands
Avoid placing hands over the ribs, upper chest, or bottom of the breastbone

Compression Technique:

Depth: At least 2 inches (5 cm) but no more than 2.4 inches (6 cm)
Rate: 100-120 compressions per minute (think “Stayin’ Alive” tempo)
Complete Recoil: Allow the chest to return to its normal position between compressions
Minimize Interruptions: Limit pauses to less than 10 seconds

Rescue Breathing:

Use head-tilt, chin-lift maneuver to open the airway
Tilt the head back by lifting the chin and pushing down on the forehead
Create a complete seal over the victim’s mouth with your barrier device or mask
Give 2 breaths, each lasting 1 second
Watch for visible chest rise with each breath
If chest doesn’t rise, reposition the airway and try again

Compression-to-Ventilation Ratio:

30 compressions to 2 breaths for both single and two-rescuer CPR
Complete 5 full cycles (30:2) before checking rhythm or pulse
Switch compressors every 2 minutes to prevent fatigue and maintain quality

Sample Adult CPR Questions

Question 1: What is the correct compression depth for adult CPR? a) 1-1.5 inches
b) At least 2 inches but no more than 2.4 inches
c) 2.5-3 inches
d) As deep as possible

Answer: b) At least 2 inches but no more than 2.4 inches

Question 2: What is the compression-to-ventilation ratio for adult CPR? a) 15:2
b) 30:2
c) 5:1
d) 15:1

Answer: b) 30:2

Pediatric CPR: Modified Techniques for Children and Infants

Understanding Age Categories

Proper age classification is crucial because CPR techniques vary significantly between age groups:

Child: 1 year to puberty (onset of secondary sexual characteristics) Infant: Birth to 1 year (excluding newborns in delivery room setting)

Child CPR (1 Year to Puberty)

Assessment Differences:

Children often experience cardiac arrest due to respiratory problems rather than primary cardiac issues
Check carotid or femoral pulse for no more than 10 seconds
Look for responsiveness appropriate to the child’s developmental level

Modified CPR Technique:

Hand Placement: Same as adult – lower half of breastbone
Compression Method: Use one or two hands depending on the child’s size
Compression Depth: At least one-third the depth of the chest (approximately 2 inches)
Compression Rate: 100-120 compressions per minute
Ventilation: Use gentler breaths – just enough to make the chest visibly rise

Compression-to-Ventilation Ratios:

Single Rescuer: 30 compressions to 2 breaths
Two Healthcare Provider Rescuers: 15 compressions to 2 breaths

Infant CPR (Birth to 1 Year)

Assessment for Infants:

Check brachial pulse (inside of the upper arm between the elbow and shoulder)
Tap the infant’s feet or flick the soles to check for responsiveness
Support the head and neck during positioning

Infant CPR Technique:

Single Rescuer: Use two fingers placed on the breastbone just below the nipple line
Two Rescuer: Use two thumbs with hands encircling the chest (preferred method)
Compression Depth: At least one-third the depth of the chest (approximately 1.5 inches)
Compression Rate: 100-120 compressions per minute
Ventilation: Cover both mouth and nose with your mouth, give very gentle puffs

Compression-to-Ventilation Ratios:

Single Rescuer: 30 compressions to 2 breaths
Two Healthcare Provider Rescuers: 15 compressions to 2 breaths

Sample Pediatric CPR Questions

Question 3: What is the compression-to-ventilation ratio for two-rescuer infant CPR? a) 30:2
b) 15:2
c) 5:1
d) 3:1

Answer: b) 15:2

Question 4: Where do you check the pulse on an infant? a) Carotid artery
b) Radial artery
c) Brachial artery
d) Femoral artery

Answer: c) Brachial artery

For hands-on practice with pediatric scenarios and age-appropriate mannequins, enroll in our comprehensive BLS certification courses where expert instructors provide personalized feedback.

AED Operation: Automated External Defibrillation

Understanding AED Function

An Automated External Defibrillator (AED) analyzes the heart’s electrical rhythm and delivers a controlled electric shock when appropriate. AEDs are designed to be used by both healthcare providers and lay rescuers, with clear voice prompts guiding users through each step.

Universal AED Steps

Step 1: Power On the AED

Turn on the AED by pressing the power button or lifting the lid
Some AEDs automatically power on when the case is opened
Listen carefully to voice prompts and follow visual instructions

Step 2: Expose and Prepare the Chest

Remove all clothing from the victim’s chest
If the chest is wet, dry it with a towel
Remove any medication patches and wipe the area clean
Quickly remove excessive chest hair if it prevents proper pad contact

Step 3: Attach AED Pads

Remove pads from packaging
Place pads exactly as shown in the diagrams on the pads
One pad goes on the upper right chest, one on the lower left side
Press pads firmly to ensure complete skin contact
Avoid placing pads over implanted devices (place at least 1 inch away)

Step 4: Analyze the Heart Rhythm

Ensure no one is touching the victim
Press the analyze button if your AED requires it (many analyze automatically)
The AED will determine if a shock is advised
Do not touch the victim during analysis

Step 5: Deliver Shock (if advised)

If shock is advised, ensure everyone is clear of the victim
Loudly state “Everyone clear!” and visually check that no one is touching the victim
Press the shock button when prompted
Immediately resume CPR starting with chest compressions after the shock

Special AED Considerations

Pediatric Use:

Children 8 years and older: Use adult pads and adult energy levels
Children 1-8 years: Use pediatric pads if available; if not, adult pads are acceptable
Infants: Manual defibrillation is preferred, but AED is acceptable if manual not available

Special Situations:

Water: Move victim away from puddles; dry chest before applying pads
Metal Surfaces: Safe to use AED on metal surfaces; electricity will not arc
Medication Patches: Remove patches and wipe area before pad placement
Implanted Devices: Place pads at least 1 inch away from device lumps under skin

Sample AED Questions

Question 5: When should you press the shock button on an AED? a) Immediately when the AED is turned on
b) Only when the AED advises a shock and everyone is clear
c) Every 2 minutes during CPR
d) When the victim starts moving

Answer: b) Only when the AED advises a shock and everyone is clear

Question 6: What should you do immediately after the AED delivers a shock? a) Check for a pulse
b) Wait for the victim to wake up
c) Resume CPR starting with compressions
d) Turn off the AED

Answer: c) Resume CPR starting with compressions

Choking Relief: Airway Obstruction Management

Recognizing Severe Airway Obstruction

Quick recognition of choking is critical for effective intervention. Look for these universal signs:

Signs of Severe Choking:

Unable to speak, cry, or make vocal sounds
Weak, ineffective cough or no cough at all
High-pitched squeaking sounds when trying to breathe
Obvious difficulty breathing with increased effort
Bluish skin color (cyanosis) around lips and face
Universal choking sign: hands clutching the throat

Adult and Child Choking Relief (1 Year and Older)

For Conscious Choking Victims:

Assess and Ask: “Are you choking? Can you speak?”
Position Yourself: Stand behind the victim with one foot slightly in front for stability
Give Back Blows: Lean the victim forward and give up to 5 sharp back blows between the shoulder blades with the heel of your hand
Perform Abdominal Thrusts: Place your arms around the victim’s waist, make a fist with one hand and place it just above the navel, grasp your fist with your other hand and give up to 5 quick upward and inward thrusts
Alternate: Continue alternating between 5 back blows and 5 abdominal thrusts until the object is expelled or the victim becomes unconscious

Abdominal Thrust Technique:

Position hands just above the navel, well below the breastbone
Make quick, upward and inward thrusts
Each thrust should be separate and distinct
Use enough force to attempt to dislodge the object

For Unconscious Choking Victims:

Lower the victim to the ground and begin CPR immediately
Before giving rescue breaths, open the mouth and look for visible objects
If you see an object, remove it with your finger
Never perform blind finger sweeps
Give rescue breaths even if you suspect choking – CPR may help dislodge the object

Infant Choking Relief (Under 1 Year)

For Conscious Choking Infants:

Position the Infant: Hold the infant face-down along your forearm, supporting the head and jaw with your hand
Give Back Blows: Using the heel of your hand, give up to 5 firm back blows between the infant’s shoulder blades
Reposition: Turn the infant face-up on your forearm, supporting the head
Give Chest Thrusts: Using two fingers, give up to 5 chest thrusts on the lower half of the breastbone
Alternate: Continue alternating between back blows and chest thrusts until object is expelled or infant becomes unconscious

Critical Safety Notes:

Never use abdominal thrusts on infants – use chest thrusts instead
Support the infant’s head and neck at all times
Keep the infant’s head lower than the chest during back blows

Sample Choking Questions

Question 7: What is the first step when you encounter an adult who appears to be choking? a) Immediately start back blows
b) Call 911
c) Ask “Are you choking?”
d) Position them on the ground

Answer: c) Ask “Are you choking?”

Question 8: How do you relieve choking in a conscious infant? a) Abdominal thrusts only
b) Back blows only
c) Alternate back blows and chest thrusts
d) Turn upside down and shake

Answer: c) Alternate back blows and chest thrusts

Practice these choking relief techniques with proper mannequins and receive expert guidance in our hands-on BLS training courses.

Chain of Survival: Understanding the Critical Sequence

Adult Chain of Survival

The Chain of Survival represents the ideal sequence of events that maximizes the chance of survival from cardiac arrest. Each link is critical, and weakness in any link reduces the likelihood of survival.

Link 1: Early Recognition and Activation of Emergency Response

Recognize signs of cardiac arrest quickly
Call 911 immediately or have someone else call
Request an AED if available
Early activation ensures advanced help is on the way

Link 2: Early High-Quality CPR

Begin chest compressions immediately
Focus on high-quality technique: proper rate, depth, and recoil
Minimize interruptions to maintain blood flow
Continue until AED arrives or EMS takes over

Link 3: Rapid Defibrillation

Apply AED as soon as it becomes available
Follow device prompts exactly
Minimize time between stopping compressions and delivering shock
Resume CPR immediately after shock delivery

Link 4: Effective Advanced Life Support

Professional emergency medical care
Advanced airway management and medication administration
Continued high-quality CPR during transport
Rapid transport to appropriate medical facility

Link 5: Integrated Post-Cardiac Arrest Care

Specialized hospital-based care
Targeted temperature management
Coronary intervention when appropriate
Neurological support and rehabilitation

Pediatric Chain of Survival

The pediatric chain reflects that many pediatric cardiac arrests are preventable and often result from respiratory problems:

Prevention of Arrest – injury prevention and rapid treatment of respiratory problems
Early High-Quality CPR – immediate bystander response
Rapid Activation of Emergency Response – quick access to emergency care
Effective Advanced Life Support – pediatric-specific protocols
Integrated Post-Cardiac Arrest Care – family-centered care approach

Understanding your role in the Chain of Survival helps you appreciate how your BLS skills contribute to the victim’s overall chance of survival.

Team-Based Resuscitation and Communication

Essential Team Roles

Effective resuscitation requires coordinated teamwork with clearly defined roles:

Team Leader:

Assigns specific roles to team members
Monitors overall resuscitation quality
Makes treatment decisions and calls for interventions
Coordinates with incoming EMS personnel
Maintains situational awareness

Primary Compressor:

Provides continuous, high-quality chest compressions
Counts compressions aloud to maintain rhythm
Communicates when becoming fatigued
Switches with backup compressor every 2 minutes

Airway Manager:

Maintains proper head position and airway opening
Provides rescue breaths with appropriate timing
Monitors chest rise and ventilation effectiveness
May assist with advanced airway placement

AED Operator:

Operates AED safely and efficiently
Ensures area is clear during rhythm analysis and shock delivery
Coordinates timing with CPR team
Announces shock delivery and resumes CPR timing

Effective Communication Principles

Closed-Loop Communication:

Team leader gives clear, specific instructions
Team member acknowledges instruction by repeating it back
Team member performs the task
Team member reports when task is completed

Example Communication Sequence:

Team Leader: “Start compressions”
Compressor: “Starting compressions” (begins chest compressions)
Team Leader: “Prepare the AED”
AED Operator: “Preparing AED” (gets AED ready)
AED Operator: “AED ready for use”

Communication Best Practices:

Speak clearly and calmly despite the emergency
Use specific, unambiguous language
Ask for clarification if instructions are unclear
Maintain professional demeanor to reduce stress

Sample Team-Based Questions

Question 9: How often should compressors switch during team CPR? a) Every minute
b) Every 2 minutes or 5 cycles
c) Every 5 minutes
d) Only when tired

Answer: b) Every 2 minutes or 5 cycles

Question 10: What is closed-loop communication? a) Speaking quietly during emergencies
b) Only the team leader speaks
c) Confirming instructions by repeating them back
d) Using hand signals instead of talking

Answer: c) Confirming instructions by repeating them back

Components of High-Quality CPR

Critical Quality Metrics

High-quality CPR significantly improves survival rates. Focus on these essential components:

Compression Rate:

Maintain 100-120 compressions per minute
Use a metronome or music with appropriate tempo
Count compressions aloud to maintain rhythm
Avoid going too fast, which reduces compression depth

Compression Depth:

Adults: At least 2 inches, no more than 2.4 inches
Children: At least one-third chest depth (about 2 inches)
Infants: At least one-third chest depth (about 1.5 inches)
Push hard enough to create blood flow

Complete Chest Recoil:

Allow chest to return completely to normal position
Do not lean on the chest between compressions
Complete recoil allows heart to refill with blood
Incomplete recoil reduces blood flow significantly

Minimize Interruptions:

Limit pauses in compressions to less than 10 seconds
Continue compressions during AED charging when possible
Avoid frequent pulse checks
Coordinate team actions to reduce downtime

Avoid Excessive Ventilation:

Give breaths slowly over 1 second each
Watch for chest rise but avoid over-inflation
Too much air causes gastric inflation and reduces blood return
Focus more on compressions than ventilations

Common CPR Mistakes to Avoid

Compression Errors:

Incorrect hand placement (too high or too low on chest)
Insufficient compression depth
Compressing too fast or too slow
Not allowing complete chest recoil
Taking too many or too long breaks

Ventilation Errors:

Giving breaths too quickly or forcefully
Inadequate head tilt and chin lift
Poor mask seal allowing air to escape
Ventilating too frequently (more than 30:2 ratio)

Regular practice and feedback are essential for maintaining high-quality CPR skills throughout your certification period.

Comprehensive Practice Questions

Test your understanding with these essential BLS knowledge questions:

Question 11: What is the correct sequence for single-rescuer adult CPR? a) Check pulse, call 911, start compressions
b) Call 911, check pulse, start CPR
c) Check responsiveness, call 911, check pulse, start CPR
d) Start CPR immediately, then call 911

Answer: c) Check responsiveness, call 911, check pulse, start CPR

Question 12: When using an AED on a child, you should: a) Always use adult pads
b) Use pediatric pads if available, adult pads if not
c) Never use an AED on children
d) Only use manual defibrillators

Answer: b) Use pediatric pads if available, adult pads if not

Question 13: The proper compression rate for CPR is: a) 80-100 compressions per minute
b) 100-120 compressions per minute
c) 120-140 compressions per minute
d) As fast as possible

Answer: b) 100-120 compressions per minute

Question 14: What should you do if you see a medication patch on a victim’s chest before applying AED pads? a) Leave it alone and place pads normally
b) Remove the patch and wipe the area clean
c) Place pads over the patch
d) Do not use the AED

Answer: b) Remove the patch and wipe the area clean

Question 15: In two-rescuer CPR for an infant, what is the preferred compression technique? a) Two fingers on the breastbone
b) One hand on the breastbone
c) Two thumbs with hands encircling the chest
d) Two hands as in adult CPR

Answer: c) Two thumbs with hands encircling the chest

Question 16: How long should you check for breathing in an unconscious victim? a) No more than 5 seconds
b) No more than 10 seconds
c) 15-20 seconds
d) Until you’re certain

Answer: b) No more than 10 seconds

Question 17: What is the most important factor in successful resuscitation? a) Speed of response
b) High-quality chest compressions
c) Rescue breathing
d) AED availability

Answer: b) High-quality chest compressions

Question 18: When should you stop CPR? a) After 10 minutes if no response
b) When EMS arrives and takes over
c) When you get tired
d) If the victim doesn’t wake up immediately

Answer: b) When EMS arrives and takes over

For additional practice questions and detailed explanations, try our free BLS sample test to assess your readiness.

Quick Reference Guide

CPR Summary by Age Group

Adults:

Compression depth: 2-2.4 inches
Compression rate: 100-120/min
Ratio: 30:2 (single and two-rescuer)
Pulse check: Carotid artery

Children (1 year to puberty):

Compression depth: At least 1/3 chest depth (~2 inches)
Compression rate: 100-120/min
Ratio: 30:2 (single rescuer), 15:2 (two rescuer)
Pulse check: Carotid or femoral artery

Infants (birth to 1 year):

Compression depth: At least 1/3 chest depth (~1.5 inches)
Compression rate: 100-120/min
Ratio: 30:2 (single rescuer), 15:2 (two rescuer)
Pulse check: Brachial artery

AED Quick Steps

Power on AED
Expose chest and attach pads
Ensure everyone is clear
Press analyze (if required)
Press shock (if advised)
Resume CPR immediately

Choking Relief Summary

Adults/Children: Back blows and abdominal thrusts
Infants: Back blows and chest thrusts (no abdominal thrusts)
Unconscious victims: Begin CPR, look for objects before breaths

Prepare for Success in Your BLS Course

You now have the essential knowledge foundation needed to excel in your BLS certification course. This study guide covers all the core competencies you’ll be tested on, from high-quality CPR techniques to proper AED operation and effective choking relief. Understanding these concepts before your class will help you focus on perfecting your hands-on skills and building the muscle memory essential for real emergency situations.

The skills you’re about to learn have the power to save lives in your workplace, community, and family. Every year, effective bystander CPR doubles or triples a cardiac arrest victim’s chance of survival. When you complete your certification, you join a community of trained responders ready to act when seconds count.

Ready to put this knowledge into practice? Register for your BLS certification class today and take advantage of our expert instruction, small class sizes, and hands-on learning environment. Our American Heart Association certified instructors at Pulse CPR and First Aid School are committed to ensuring every student gains the confidence and competence to respond effectively in emergency situations. Don’t wait – the life you save could be someone you love.

Contact us at (706) 901-7277 or visit pulsecprschool.com to schedule your certification course. We serve communities throughout Georgia with convenient locations and flexible scheduling options.

Disclaimer: This study guide is designed to supplement official American Heart Association BLS training materials and instructor-led courses. Successful completion of a hands-on BLS course with certified instructors is required for official certification. Information is based on current AHA guidelines and may be updated as new research becomes available.

CPR & Safety Resources

BLS Pre-Course Study Guide