Choking First Aid: Abdominal Thrusts, Back Blows, and Chest Thrusts by Age Group

Introduction

Choking occurs when a foreign object partially or completely obstructs the airway, preventing breathing. It is a life-threatening emergency requiring immediate action. Choking is the fourth leading cause of unintentional injury death in the United States. The approach varies by age: abdominal thrusts (Heimlich maneuver) for adults and children over 1 year, and back blows with chest thrusts for infants under 1 year.

Recognizing Choking

Universal Distress Sign

Sign	Description
Clutching throat	One or both hands gripping the throat (universal choking sign)
Inability to speak	Cannot vocalize or make sounds
Difficulty breathing	Labored breathing, stridor, wheezing
Cyanosis	Blue discoloration of lips, face, nail beds
Weak or absent cough	Ineffective, silent cough (distress sign)
High-pitched sounds	Squeaking or crowing sound on inhalation
Panic appearance	Wide eyes, frightened expression
Collapse	Loss of consciousness from hypoxia

Partial vs Complete Airway Obstruction

Feature	Partial Obstruction	Complete Obstruction
Air exchange	Good to poor	None
Coughing	Forceful, effective	Weak, ineffective, or silent
Sound	Able to speak/cry/wheeze	Unable to make any sound
Color	Pink to slightly pale	Cyanotic, dusky
Intervention	Encourage coughing, do NOT interfere	Immediate back blows/thrusts
Outcome	May clear spontaneously	Will become unconscious within minutes

Adult and Child Choking (Age 1+)

Conscious Choking: Abdominal Thrusts (Heimlich Maneuver)

Step	Description	Detail
1	Identify choking	Assess for universal sign, inability to speak
2	Position behind victim	Stand behind, wrap arms around waist
3	Make fist	Place thumb side against abdomen, above navel, below ribcage
4	Grasp fist	Other hand grasps fist
5	Thrust inward and upward	Quick, forceful thrusts inward and upward
6	Repeat	Continue until object expelled or victim becomes unconscious
7	After expulsion	Seek medical evaluation for complications

Special Considerations for Abdominal Thrusts

Situation	Modification
Obese victim	Chest thrusts (same as pregnant patient)
Pregnant (visible pregnancy or late term)	Chest thrusts (hand in center of lower sternum)
Person in wheelchair	Lock wheels, perform from behind, bend person forward
Very large adult	Perform from behind, lean victim forward

Unconscious Victim (After Choking)

Step	Action
1	Lower victim to ground (protect head)
2	Activate EMS (call 911)
3	Begin CPR (start with compressions)
4	Before breaths: check mouth for visible object
5	If object seen: sweep it out with finger (do NOT blind finger sweep)
6	Attempt ventilation: if air does not go in, re-position head, try again
7	Continue CPR cycles of 30 compressions, check mouth, 2 breaths
8	Continue until object removed, victim breathes, or EMS arrives

Infant Choking (Under 1 Year)

Conscious Infant: Back Blows and Chest Thrusts

Step	Description	Detail
1	Assess	Infant cannot cry, cough, or breathe; weak cry
2	Position infant	Face-down on forearm, head lower than chest
3	Support head	Hold jaw, not throat; head slightly lower than trunk
4	Back blows	5 firm back blows between shoulder blades with heel of hand
5	Turn infant	Sandwich between arms, turn face-up on other forearm
6	Chest thrusts	5 chest thrusts (same as infant CPR: 2 fingers, lower sternum)
7	Alternate	5 back blows, 5 chest thrusts in cycles
8	Repeat	Continue cycles until object expelled or infant becomes unconscious

Unconscious Infant (After Choking)

Step	Action
1	Lower infant to firm, flat surface
2	Activate EMS (have someone call 911)
3	Begin infant CPR (30 compressions, 2 breaths)
4	Check mouth before breaths: visible object only
5	Attempt ventilation: if no chest rise, re-position head, re-attempt
6	Continue 30:2 cycles with mouth checks
7	Transport to emergency care immediately

Comparison: Back Blows vs Abdominal Thrusts

Aspect	Back Blows (Infants)	Abdominal Thrusts (Adults/Children)
Age indication	Infants <1 year	Children >1 year and adults
Mechanism	Forceful air from cough-like pressure	Diaphragm elevation increases intrathoracic pressure
Position	Face-down, head lower than chest	Standing, behind victim, arms around waist
Force	Moderate, between shoulder blades	Sharp, inward and upward
Risk	Minimal	Organ rupture, fracture, regurgitation

Self-Choking Technique

Self-Heimlich (When Alone)

Step	Description
1	Make fist with one hand
2	Place thumb side of fist above navel, below ribcage
3	Grasp fist with other hand
4	Thrust forcefully inward and upward
5	Repeat until object expelled

Alternative Self-Rescue (Use Furniture)

Method	Description
Chair/table edge	Position upper abdomen over edge of chair, table, or counter
Lean forward	Let body weight fall forward, driving object upward
Sharp thrust	Use momentum of body weight against the edge
Repeat	Continue until object expelled or EMS arrives

Mechanical Airway Obstruction Devices

Device	Description	Evidence
LifeVac	Suction device with one-way valve	Case reports, limited controlled trials
DeChoker	Piston-driven suction	Similar to LifeVac
Recommendation	Manual thrusts remain first-line	Devices are adjuncts when standard fails

Complications of Choking Interventions

Abdominal Thrust Complications

Complication	Mechanism	Frequency
Gastric rupture	Forceful upward thrust on full stomach	Rare
Esophageal rupture	Sudden increased intraluminal pressure	Rare
Rib fracture	Force transmitted through chest wall	Uncommon
Pancreatic injury	Compression against spine	Rare
Aortic dissection	Sudden pressure change	Very rare
Vomiting/aspiration	Gastric contents expelled	Common
Abdominal organ injury	Liver, spleen laceration	Rare

Back Blow/Thrust Complications (Infants)

Complication	Mechanism	Prevention
Rib fracture	Excessive force in small infant	Use moderate force, proper hand placement
Bruising	Overly aggressive technique	Monitor force
Airway trauma	Improper positioning	Maintain head lower than chest

Special Populations

Pregnant Women

Gestation	Technique	Rationale
Early (<20 weeks)	Standard abdominal thrusts if space permits	Uterus not yet large enough to interfere
Late (>20 weeks) or visible pregnancy	Chest thrusts	Abdominal thrusts may injure uterus

Obese Patients

Approach	Technique	Rationale
Standard reachable	Abdominal thrusts if arms can encircle	Standard technique
Unable to encircle abdomen	Chest thrusts	Thrust over center of lower sternum

Persons with Disabilities

Disability	Adaptation
Wheelchair user	Lock wheels, perform from behind leaning over back of chair
Walker user	Remove walker if possible, perform from behind
Bedridden	Roll to side, give back blows, then chest thrusts

Emergency Medical Services (EMS) Choking Protocol

EMS Interventions

Intervention	Indication
BLS: back blows/abdominal thrusts	Conscious victim
BLS: CPR sequence	Unconscious victim
Direct laryngoscopy + Magill forceps	Visualization of supraglottic object
Bag-valve-mask ventilation	After obstruction relieved, if ventilation remains inadequate
Surgical airway (cricothyrotomy)	Complete obstruction not relieved by BLS, cannot intubate

Prevention

High-Risk Foods

Food	Risk Factor
Hot dogs (especially in children)	Cylindrical shape, compresses to fit airway exactly
Grapes	Size and shape match child’s airway
Nuts	Hard, small, easily aspirated
Popcorn	Irregular pieces that can lodge
Hard candy	Smooth, round, easily aspirated
Chunks of meat	Requires proper chewing
Peanut butter	Sticky, can form bolus that obstructs

Choking Risk Reduction Strategies

Population	Strategy
Children <5 years	Avoid high-risk foods; supervise eating; cut food into small pieces
Elderly	Ensure dentures fit; cut food into small pieces; supervise
Neurologic impairment	Modified textures; supervised feeding; upright positioning
Alcohol intoxication	Avoid eating when heavily intoxicated
General	Chew thoroughly; eat slowly; avoid talking/laughing while chewing
Toddlers	Keep small objects out of reach (coins, buttons, balloons, marbles)

Outcome and Prognosis

Time to Relief	Outcome
<2 minutes	Full recovery, no sequelae
2-4 minutes	Possible hypoxic brain injury
4-6 minutes	High probability of brain damage
>6 minutes	Severe hypoxic-ischemic encephalopathy or death
CPR-initiated early	Improved survival and neurologic outcome