Place the infant face down along your forearm, head lower than the chest and the head supported along the jaw, then deliver five back blows between the shoulder blades with the heel of your hand. The head-down tilt is the defining position — roughly 30 degrees below horizontal — not the flat, head-up hold many parents default to. That tilt is what lets gravity assist the cough and shift a partial blockage, and it's the detail caregivers most often get wrong when a real choking episode starts.
This article walks through the position itself, the surface you hold the baby on, where the blows land, how much force is right, and what to do when five blows change nothing.
Why the Head-Down Angle Is the Whole Point of Back Blows
The tilt does mechanical work. With the infant's head below the chest, gravity pulls down the airway in the same direction you want a lodged object to travel. A 1983 study in the British Medical Journal by H. R. M. de Burgh Daly (a name usually shortened to H. R. M. Daly in later reviews) measured the angle at which back blows were most effective and settled at roughly 30 degrees — the figure that flows through current first-aid curricula, including the Australian Resuscitation Council's Guideline 4.4 on foreign body airway obstruction.
At 30 degrees, an infant's chest sits noticeably lower than the hips, but you're not holding the baby upside down. Invert more than that and the arms and legs dangle, the grip gets awkward, and the head is harder to keep neutral. Tilt less — a flat, belly-down hold — and you've removed the gravitation assist the technique is built around.
The angle also changes where the force goes. Blows delivered on a horizontal infant drive mostly into the rib cage. On a tilted infant, the same blow lands with a slight downward vector toward the blockage, and the baby's own weight against your forearm braces the chest so the impact transfers instead of just bouncing the body.
Most of the adult-sized instinct to "hold the baby upright and pat the back" comes from burping. That instinct is working against you here — upright means gravity pulls the object deeper.
Build the Platform Before the First Blow Lands
Before you turn the baby over, decide what's under your forearm. The ideal surface is your own thigh with your foot flat on the floor, so your forearm rests at a natural downward slope and you can lean forward slightly. Kneeling is the alternative when no chair is nearby — it's more stable than crouching and gets you at the right working height, though it makes the forearm slope harder to hold steady for more than a few seconds.
If someone else is present, that person should be on the phone with emergency services. If you're alone, the standard guidance is to call first on speakerphone, then start the five-blow sequence — but the practical caveat the top guides skip is that a single rescuer with a fully obstructed infant shouldn't burn 20 seconds hunting for a phone. The Australian Resuscitation Council's 2021 update explicitly places back blows ahead of the emergency call for a witnessed complete obstruction in an infant; the call goes out the moment the baby is on your forearm and you can free a hand.
Take the baby's clothing into account. A thick sleep sack bunches under the blow and absorbs force. If it unzips in one motion, do it; if not, work through the fabric and know you'll need slightly firmer contact.
Never place the infant on a bed, sofa, or changing table to do this, even cushioned ones. A soft surface compresses under the blow, so the energy goes into the mattress rather than the chest wall, and a squirming infant can roll off. Your thigh is not a compromise — it's the recommended platform.
Put the Baby Into Position in Five Moves
Here is the full position, in order, from a baby who is coughing or cannot clear the airway.
1: Sit or kneel with a stable base, and lay your left forearm (or the arm on your dominant-blow side's opposite) across your thigh so the wrist is lower than the elbow. 2: Support the infant's head by cradling the jaw between your thumb and fingers on one side — not the throat, and not the soft tissue under the chin. 3: Turn the baby face down along the forearm so the chest is on your arm and the head points toward your knee or the floor. 4: Check the tilt: the head should sit clear of your wrist, dropping about a hand's width below the level of the hips — the practical 30-degree approximation. If the chin is jammed against your wrist, the head is too high. 5: Bring your other hand flat and let the heel (the meaty base of the palm, above the wrist crease) line up across the middle of the back between the shoulder blades.
The most common failure point is step two: gripping the jaw so hard the infant's head turns, which both closes the airway and makes the tilt impossible to judge. The second failure is a high head — beginner rescuers reflexively lift the head to "support" it, and the baby ends up horizontal. Check by looking at the baby's ear line versus the hip line. If they're roughly parallel, re-tilt.
If the baby arches and fights the hold, don't tighten your grip — lower your forearm toward the thigh further so gravity works with you and the baby settles into the angle.
Five Strikes Between the Shoulder Blades, Not on Them
Target the middle of the upper back, midway between the shoulder blades and along the spine's line. The heel of your hand should make contact flat — not fingertips, not a closed fist, not the edge of the hand. A slap with the fingers concentrates force on a small area and can bruise ribs without moving anything; the heel spreads it.
Five blows, then stop and check. The sequence count isn't arbitrary — the Australian Resuscitation Council's Guideline 4.4 specifies a maximum of five back blows in an infant before reassessing or switching to chest thrusts. The reassessment matters: some blockages clear on blow two or three, and continuing to hit a baby who is now breathing and crying is unnecessary trauma.
Force is where parents under-deliver. Blows should be firm enough to make the baby's head and body move with each strike — noticeably, not violently. In training terms, it's somewhere between a burp pat and a firm slap, and the accepted compromise is "firm enough to be effective, gentle enough not to cause injury." The UK's Resuscitation Council and St John Ambulance materials both use that framing because a limp, timid pat does nothing to a lodged object.
The blows should be slightly angled, not perfectly perpendicular. Because the baby is head-down, a blow that travels slightly toward the head carries force down the airway toward the blockage rather than across the chest.
Keep one hand cradling the jaw the entire time. The blows will jostle the head, and a jaw grip that slips mid-sequence turns the baby into a moving target.
Where the Blow Lands: The Table Caregivers Usually Have to Guess At
Most infant choking guides describe the blow target in words but never draw the comparison. Here is what separates a correct strike from the four common near-misses.
| Target or technique | Where it lands | Why it fails or works |
|---|---|---|
| Mid-back, between shoulder blades | Center of upper back, across the spine | Correct: force drives down the tilted airway |
| On the shoulder blades themselves | Outer edges of upper back | Force scattered outward, ribs take the load |
| Lower back / kidney area | Below the rib cage | No airway access; bruising risk with no benefit |
| Back of the neck | Base of skull | Dangerous; risk of injury to the cervical spine |
| Fingertip slap | Small point on the back | Concentrated force, little chest-wall movement |
| Heel of palm, flat | Broad contact across the mid-back | Transfers energy through the chest wall |
The reason this table matters: the difference between the correct strike and the shoulder-blade strike is a couple of centimeters, and most panic rescues happen at that distance. Land the blow by sight before you start — find the V of the shoulder blades with your fingers, then reposition your hand's heel to sit just below and between them.
Cradle the Head Without Blocking the Airway
The jaw hold is doing two jobs at once: supporting the head and keeping the airway aligned. Your thumb goes on one side of the jawbone, your index or middle finger on the other, and the heel of that hand rests lightly against the baby's cheek or temple. The neck stays in neutral alignment with the spine — not tipped back (which can pinch a small infant's airway) and not tucked forward.
Do not grip the throat. A jaw hold is a hold on bone, not soft tissue. If you can feel yourself pressing into the front of the neck, your fingers have slipped.
For a larger infant — say a chubby 10-month-old — the jaw grip alone may not stabilize the head against firm blows. Bring the baby slightly higher on your forearm so more of the chest and upper belly rest on the arm, and angle your wrist so the head has something to fall against rather than away from.
A wriggling or distressed baby makes the cradle harder than any diagram suggests. Practice the hold on a calm infant (diaper change, before a bath) so your hands learn the shape before you need it under pressure.
When Five Blows Don't Clear It: Switch to Chest Thrusts
If the airway is still blocked after five back blows, the sequence flips. Turn the infant face up, still head-down at roughly 30 degrees, rest the head on your forearm or thigh, and deliver five chest thrusts with two fingers on the lower half of the breastbone — the same spot you'd use for infant CPR compressions. Then reassess, and if the object is still there, alternate five back blows and five chest thrusts.
Do not do abdominal thrusts (the Heimlich maneuver) on an infant. The Australian Resuscitation Council and the American Heart Association both restrict abdominal thrusts to children over one year and adults, because an infant's liver sits lower and more forward in the abdomen and is easily injured. If someone suggests "the Heimlich" for a baby, correct them.
If the infant becomes unresponsive at any point, stop choking maneuvers and start infant CPR — 30 compressions to two rescue breaths — and call emergency services if that hasn't happened yet. The position no longer matters once the baby is unconscious; getting blood and air moving does.
The full back-blow-then-chest-thrust cycle should continue until the object clears, the baby starts breathing or crying, or trained help arrives. There's no maximum number of cycles, only a maximum of five in each direction before reassessing.
Ages and Edge Cases Where the Standard Position Needs Adjusting
The face-down 30-degree hold is the standard for infants up to one year. Past that birthday, the technique changes: a child over one gets back blows delivered with the child leaning forward on your thigh or knee (not draped over your forearm), and abdominal thrusts become available if back blows fail. The Food and Drug Administration's public choking guidance and major first-aid providers treat the first birthday as the pivot point, and a 13-month-old should get the child version, not the infant version.
Newborns are a special case. A very small newborn's head is proportionally huge and the neck is weak, so the jaw cradle has to be more careful and the tilt should be shallower — closer to 20 degrees — to keep the head from flopping. The sequence of five blows still applies.
A larger infant closer to the one-year mark may not fit across a single forearm. In that case the baby's chest and belly rest on your forearm and thigh together, with the head extended past your wrist, and you accept that the tilt is approximate. The rule is head-below-hips, not a protractor-perfect 30 degrees.
An infant in a car seat, high chair, or stroller should be taken out before any maneuver. Straps prevent the position and the seat prevents the blow from landing correctly.
The Mistakes That Turn a Correct Position Into a Dangerous One
The first mistake is going upright. Burp position is ingrained, and in an emergency, muscle memory wins unless you've rehearsed the alternative. A baby held vertically to the shoulder while you slap the back is the position least likely to work and the one most often used.
The second is striking too softly. Caregivers worry about hurting the baby and deliver pats that don't move the chest. The framework from the UK's St John Ambulance training is direct: back blows should be firm, and a rib bruise is a survivable cost against an unrelieved airway obstruction.
The third is continuing after the object clears. Five blows, then check. If the baby is crying, coughing normally, or breathing comfortably, stop and call for medical advice — some objects leave irritation behind and a clinician should confirm the airway is clear.
The fourth is forgetting to look in the mouth. Between cycles, if you can see the object at the back of the throat, a finger sweep is appropriate in an infant only when the object is visible and easily reached. Blind finger sweeps are explicitly discouraged because they can push the object deeper.
The fifth, and quietest, is doing nothing because the baby is coughing. A baby who is coughing forcefully is moving air and should be left to cough, watched, and encouraged. Back blows begin when the cough becomes silent or ineffective — the baby can't cry, can't breathe, or the cough is weak.
Frequently Asked Questions
Should the baby's head be lower than the chest or just level with it?
Lower, and clearly so. The 30-degree head-down tilt keeps gravity pulling the object in the direction you want it to travel, and H. R. M. Daly's 1983 British Medical Journal work is the measurement back-of-the-envelope numbers trace to. A horizontal baby loses most of that assist, and a head-up hold works against you entirely. If you can't judge the angle, check the ears against the hips.
Can I do back blows while the baby is sitting in my lap?
No. A seated or upright infant removes the tilt and puts the blow force into the ribs without the airway benefit. The infant needs to be face down along a forearm with the head lower than the hips. If a bystander is holding the baby upright and patting, ask them to hand the baby over and reposition.
What if the object doesn't come out after five back blows?
Switch to five chest thrusts with the baby face up and still head-down, then alternate five back blows and five chest thrusts, checking the airway between each cycle. Don't do abdominal thrusts on an infant — the liver position makes them unsafe under one year. If the baby goes limp or stops responding, begin infant CPR and call emergency services.
How hard is "firm" when you weigh 50 kg versus 100 kg?
Force is scaled to the infant, not the rescuer: blows should move the baby's head and torso noticeably, roughly the force of a firm burp pat delivered with a flat hand. A 50 kg rescuer using the heel of the hand and a slight lean into the blow generates more effective force than a 100 kg rescuer using fingertips. Learn the contact point on a doll before you need it.
Does the position change once the baby is walking?
Yes — the one-year birthday is the pivot. Under one year, face down on the forearm at 30 degrees; over one year, leaning forward on your thigh or knee with back blows, and abdominal thrusts become available if back blows fail. A walking 11-month-old still gets the infant method; a 13-month-old gets the child method.
Is it safe to practice the hold on a healthy baby?
Practice the grip and the forearm position on a calm, healthy baby during a diaper change — it's a supported cuddle, not a maneuver. Never practice the actual blows on a baby. Use an infant CPR manikin (many first-aid courses supply them) to learn force and contact point, and ask a certified instructor to check your hand position.
What should I do if the baby vomits during the sequence?
Turn the head to the side and clear the mouth with a visible sweep if needed, then reassess breathing. Vomiting is a common byproduct of back blows and doesn't necessarily mean the object has cleared. If the baby stops breathing after vomiting, start CPR and call emergency services.
This article is general educational information about infant first aid and is not a diagnosis, treatment plan, or substitute for certified training. Airway emergencies in infants can deteriorate in seconds; always call your local emergency number (911 in the US, 999 in the UK, 000 in Australia, 112 across the EU) for any infant who cannot breathe, cry, or cough effectively, and enroll in an accredited infant CPR and choking course — the Australian Resuscitation Council, American Red Cross, St John Ambulance, and Resuscitation Council UK all publish current curricula — so the position becomes muscle memory before you need it.