How Do You Relieve the Airway Obstruction of an Infant?

For an infant who is choking on a foreign object and cannot cough, cry, or breathe, the recommended technique is a repeating cycle of five back blows followed by five chest thrusts, performed until the object is expelled or the infant loses consciousness. The American Heart Association’s 2025 pediatric guidelines specifically distinguish this approach from what you would do for an older child or adult, where abdominal thrusts are used instead. The reasoning comes down to infant anatomy and the real risk of organ injury, and the technique itself is straightforward enough that any caregiver can learn it.

Why Infants Get a Different Technique Than Older Children

An infant’s airway is not simply a scaled-down version of an adult’s. The structures are proportionally different: the tongue is larger relative to the mouth, the larynx sits higher in the neck, and the trachea is narrower and more pliable. These differences mean that an infant’s airway is more easily blocked and more vulnerable to swelling or compression.

1PubMed Central. Pediatric Airway Pathology

The practical consequence is that abdominal thrusts, commonly called the Heimlich maneuver, are not used on infants younger than about one year. Their abdominal organs, particularly the liver, sit relatively higher and are less protected by the rib cage, making forceful upward pressure dangerous. The 2025 AHA and AAP guidelines are explicit: infants with severe foreign-body airway obstruction receive repeated cycles of five back blows alternating with five chest thrusts, with no abdominal thrusts at all. For children roughly one year and older, the protocol switches to back blows alternating with abdominal thrusts.

2Circulation. Part 6: Pediatric Basic Life Support: 2025 American Heart Association and American Academy of Pediatrics Guidelines for Cardiopulmonary Resuscitation and Emergency Cardiovascular Care

How to Perform Back Blows and Chest Thrusts

The technique works by creating sharp bursts of pressure inside the airway, essentially generating an artificial cough that can dislodge whatever is stuck. Back blows do this by transmitting force through the chest wall to raise pressure behind the blockage. Chest thrusts work similarly but from the front, compressing the chest to push air upward through the trachea.

3PubMed. Emergency treatment of the choking child

To deliver back blows, you hold the infant face-down along your forearm (or across your thigh if seated), supporting the head and jaw with your hand and keeping the head lower than the body. Using the heel of your other hand, you deliver five firm blows between the shoulder blades. Each blow should be a distinct, forceful strike, not a pat. Then you turn the infant face-up, still keeping the head lower than the body, and deliver five chest thrusts using two fingers placed just below the nipple line on the breastbone. Each thrust should compress the chest about one-third of its depth. You alternate these cycles until either the object comes out, the infant starts breathing or crying, or the infant becomes unresponsive.

If the infant goes limp and stops responding, you shift to infant CPR. Call emergency services if you haven’t already, and begin chest compressions and rescue breaths. Each time you open the airway for a breath, look into the mouth. If you can see the object, remove it. Do not perform blind finger sweeps, since you can push the object deeper.

When You Should Not Intervene

Not every coughing or gagging episode calls for back blows and chest thrusts. If the infant can still cough forcefully, cry, or make sounds, the airway is only partially blocked, and the infant’s own cough reflex is the most effective tool for clearing it. Intervening at that point can actually make things worse. A well-meaning back blow during a strong cough could reposition the object into a more dangerous spot.

The AAP recognized this distinction decades ago, noting that if a choking child could breathe and was able to speak or cough, all maneuvers were unnecessary and potentially dangerous.

4Pediatrics. First Aid for the Choking Child, 1988

The critical trigger for action is a silent infant. When the baby cannot make sounds, cannot cry, and you see the chest pulling in without productive breathing, the obstruction is severe and the clock is running. That silent distress, sometimes accompanied by a bluish tinge around the lips, is the signal to start the back blow and chest thrust cycle immediately.

Getting the Head Position Right

Head positioning matters more than most people realize with infants. The reason goes back to anatomy: a baby’s large occiput (the back of the skull) naturally pushes the head forward when the infant lies flat, which can flex the neck enough to partially close the airway even without any foreign body involved. Simply placing a baby on a flat surface can narrow the air passage.

The neutral or sniffing position, where the face points slightly upward as if sniffing the air, is the alignment that best opens an infant’s airway.

5Pediatric Anesthesia. An approach to define newborns´ sniffing position using an angle based on reproducible facial landmarks Research using MRI data on newborns found that the probability of a fully open airway climbed steadily as the head-tilt angle increased, reaching above 95% at a tilt of roughly 144 to 150 degrees.

6PubMed Central. Defining Optimal Head-Tilt Position of Resuscitation in Neonates and Young Infants Using Magnetic Resonance Imaging Data

During back blows, you achieve this naturally by holding the infant face-down with the head lower than the body. During chest thrusts or rescue breathing, a small roll under the shoulders can help tilt the head into the sniffing position. In clinical settings, a jaw thrust, lifting the lower jaw forward, has been found more effective than head tilt alone for opening the upper airway during mask ventilation.

7PubMed. Airway manoeuvres to achieve upper airway patency during mask ventilation in newborn infants – An historical perspective

When the Problem Is Not a Foreign Object

Choking on food or small objects is the scenario most people picture, but several other conditions can cause sudden airway obstruction in infants. The symptoms can look strikingly similar: noisy breathing, a barking cough, visible chest retractions, and obvious distress. Knowing the difference matters because back blows and chest thrusts will not fix these problems, and the real treatments are entirely different.

The differential diagnosis of airway obstruction in young children is broad, including viral croup, bacterial tracheitis, retropharyngeal abscess, and foreign-body aspiration.

8Emergency Medicine. Foreign body aspiration presenting as croup Foreign-body aspiration in particular is described as a “great mimicker” of croup, which complicates things when the caregiver did not witness the choking event. One case report describes an infant treated for croup for four days before doctors discovered a flat foreign body lodged in the subglottis, too thin to appear on X-ray or CT scan.

9PubMed Central. A subglottic foreign body mimicking croup

Anaphylaxis is another cause of rapid airway compromise in infants. An allergic reaction can cause throat swelling that narrows the airway within minutes. The first-line treatment is intramuscular epinephrine, not airway maneuvers. Inhaled bronchodilators and antihistamines play a supporting role.

10PubMed Central. Emergency treatment of anaphylaxis in infants and children

Laryngomalacia and Congenital Airway Problems

Some infants have airway obstruction that is not caused by any external object or acute illness. Laryngomalacia, the most common congenital cause of noisy breathing in babies, happens when the soft tissues above the vocal cords are unusually floppy. When the baby breathes in, the negative pressure in the chest pulls these tissues inward, partially blocking airflow. The result is a characteristic high-pitched sound on inhalation, called stridor, that often worsens during feeding, crying, or lying on the back.

11EAS Journal of Anaesthesiology and Critical Care. Overcoming Diagnostic and Surgical Barriers in Rural – Airway Obstruction: A Case of Infantile Laryngomalacia in Zanzibar

Most mild cases resolve on their own by 18 to 24 months as the cartilage firms up. Moderate cases may need anti-reflux therapy and careful positioning during feeds. Severe cases, where the infant develops low oxygen levels, poor weight gain, or sleep apnea, can require surgery. The standard procedure is supraglottoplasty, where surgeons trim or reshape the floppy tissue to open the airway. The approach is tailored to whatever specific structure is collapsing inward, whether that is the epiglottis, the aryepiglottic folds, or the tissue around the arytenoid cartilages.

12PubMed Central. Laryngomalacia and Obstructive Sleep Apnea in Children: From Diagnosis to Treatment

The Challenge of Finding Foreign Bodies on Imaging

When a foreign body is suspected but the choking episode was not witnessed, or when symptoms linger after an apparent resolution, imaging becomes important. The trouble is that most aspirated foreign bodies in children are radiolucent, meaning they do not show up on a standard X-ray.

13PubMed. Review of Ingested and Aspirated Foreign Bodies in Children and Their Clinical Significance for Radiologists

A peanut, a grape, a piece of carrot, or a bit of plastic toy will not cast a shadow on a chest X-ray the way a coin or a battery would. Clinicians instead look for indirect signs such as unilateral emphysema, where one lung appears overinflated because air can get past the object on inspiration but gets trapped on expiration. One series of cases highlighted how even subtle partial emphysema on a chest X-ray prompted further CT evaluation that confirmed the foreign body.

14PubMed Central. Subtle Crucial X-Ray Findings in Pediatric Foreign Body Asphyxia

A study examining the accuracy of different assessment methods found that clinical history had high sensitivity (about 98%) but low specificity for detecting aspiration, meaning almost every true case was caught by the history but many false alarms occurred too. Standard radiological findings had the opposite profile: specificity above 90% but sensitivity of only about 35%, meaning X-rays were good at confirming aspiration when they showed something but missed most cases.

15PubMed. A Diagnostic Dilemma for the Pediatrician: Radiolucent Tracheobronchial Foreign Body In practice, a detailed history combined with imaging offers the best chance of catching an aspirated object, especially when the initial presentation looks like something else entirely.

A Complication Most People Have Never Heard Of

Even after the obstruction itself is relieved, the infant’s lungs can develop a complication called negative-pressure pulmonary edema. This happens when forceful breathing against a blocked airway generates unusually strong negative pressure inside the chest. That pressure gradient pulls fluid out of blood vessels and into the lung tissue, causing rapid-onset swelling that looks and behaves like the lungs filling with fluid.

16PubMed Central. An exceptional cause of acute respiratory failure in an infant: negative pressure pulmonary edema

Infants are particularly susceptible because their chest walls are more compliant, allowing bigger pressure swings, and because the obstruction can develop rapidly. Case reports have documented this occurring even in clinical settings during anesthesia, when the tongue fell back against the throat wall while the diaphragm was still working hard.

17PubMed. Negative pressure pulmonary oedema: a potential hazard of muscle relaxants in awake infants This is one reason why an infant who experienced a significant choking episode should be seen by a doctor afterward, even if the object came out and the baby seems fine. Pulmonary edema can develop within minutes to hours after the event.

Preventing Choking in the First Place

The food characteristics most dangerous to infants and young children are well documented. Hard, round foods with a smooth or slippery surface pose the highest risk. Think grapes, cherry tomatoes, hot dog rounds, hard candy, nuts, and raw carrot coins. The combination of a shape that seals neatly against a small airway, a texture that resists being broken apart by immature chewing, and a slippery surface that helps the piece slide backward is what makes these foods so dangerous.

18PubMed. Fatal and non-fatal food injuries among children (aged 0-14 years)

The AAP has called on food manufacturers to redesign products to reduce choking risk, noting that shape, size, consistency, and surface properties all contribute to the hazard.

19PubMed. Prevention of choking among children For caregivers, practical steps include quartering grapes lengthwise, slicing hot dogs into thin strips rather than rounds, cooking hard vegetables until soft, avoiding whole nuts and hard candy entirely for children under four, and always supervising mealtimes. Non-food hazards like small toy parts, button batteries, and coins also remain common culprits.

What Caregivers Actually Know and Get Wrong

A cross-sectional study of 333 caregivers in Poland tested knowledge of foreign-body aspiration and choking response. The overall accuracy was roughly 80%, which sounds decent until you look at where the errors clustered. The highest rates of wrong answers involved recognizing the difference between an effective and an ineffective cough, and knowing the correct action for an infant with an ineffective cough. Those happen to be exactly the judgments that matter most in a real emergency: knowing when to act and what to do.

20BMC Pediatrics. Caregiver awareness and preparedness regarding pediatric foreign body aspiration and emergency response in Poland: a cross-sectional observational study

Formal first-aid training was the strongest predictor of better scores, boosting the expected number of correct answers by roughly 9 to 18%. Having a medical education background pushed that higher, around 19 to 30%. The takeaway is that even brief, structured training makes a measurable difference. Many hospitals and community organizations offer infant CPR and choking classes, and the techniques are simple enough that a single session can give you the muscle memory you need. Practicing on an infant manikin matters more than reading about it, because a real emergency does not give you time to think through the steps.

Suction Devices and Alternative Tools

In recent years, anti-choking suction devices like the LifeVac have attracted attention as possible alternatives or supplements to manual techniques. A laboratory study tested the LifeVac against the Heimlich maneuver on a simulated airway model and found that both successfully relieved obstruction in all 200 attempts. However, the two devices work by opposite mechanisms. The Heimlich maneuver generates positive pressure below the obstruction, pushing upward. The suction device creates negative pressure above the obstruction, pulling upward. The positive pressure gradients produced by abdominal thrusts were significantly higher than the negative pressure gradients generated by the suction device across all operators.

21Jornal de Pediatria. Comparative efficacy of LifeVac® and Heimlich maneuver in simulated airway obstruction

These findings come with big caveats. The study used a manikin model, not living patients, and the comparison was with abdominal thrusts rather than infant back blows and chest thrusts. No suction device has been tested against the back-blow/chest-thrust protocol in a controlled setting with real infants, for obvious ethical reasons. Current guidelines from the AHA and similar bodies do not endorse suction devices as a replacement for standard manual techniques. They may have a role as a backup when standard maneuvers fail, but owning one is not a substitute for knowing how to deliver proper back blows and chest thrusts.