After the Fontan Procedure: Sternum Healing, Hydration and How to Lift Your Child Safely

The first time you reach for your child after open-heart surgery, your hands hesitate. For three years you have lifted this small person a dozen times a day without thinking. Now there is a line of dressing down the middle of the chest, a drain that was only removed yesterday, and a nurse quietly showing you where to put your arms.

That hesitation is the honest starting point for the fontan surgery recovery weeks. Parents leave hospital carrying a discharge folder, a list of medicines and a set of rules about lifting, bathing and drinking that can feel oddly specific until someone explains the reasoning behind each one.

This explainer does that. It walks through what the operation changes inside the chest, why the breastbone needs the time it needs, why a bottle of water is not a small thing in this circulation, and how to tell an ordinary bad day from a day that needs a phone call.

What does the Fontan procedure actually do?

A healthy heart has two pumping chambers. The right ventricle pushes blue, oxygen-poor blood to the lungs; the left ventricle pushes red, oxygen-rich blood to the body. Some children are born with only one ventricle strong enough to do real work, a group of conditions doctors call single ventricle heart disease. Hypoplastic left heart syndrome and tricuspid atresia are two of the better-known examples.

The Fontan is usually the third of three staged operations that rebuild how blood moves. By the time a child reaches it, an earlier operation (often called the Glenn or hemi-Fontan) has already connected the large vein from the upper body directly to the lung arteries. The Fontan completes the idea: the surgeon routes the large vein from the lower body to the lung arteries as well, typically through a tube of synthetic material placed outside the heart or a channel built along the inside wall of the atrium.

The result is a circulation with no pump behind the lungs. Blue blood flows to the lungs passively, driven by pressure in the veins, by breathing, and by the squeeze of leg and belly muscles. The single ventricle is then freed to do one job, pumping red blood to the body. Oxygen levels in the blood rise because blue and red streams no longer mix inside the heart.

Surgeons often leave a small deliberate opening, called a fenestration, between the new channel and the heart. It acts as a pressure release valve in the early weeks and is sometimes closed later in a catheter lab procedure. The Cleveland Clinic describes this staged sequence and its purpose in plain terms, and the physiology matters for parents because almost every home-care rule in the weeks ahead follows from one fact: this circulation depends on venous flow that the heart itself cannot generate.

Who is the Fontan usually for, and who is asked to wait?

The Fontan is offered to children whose single-ventricle anatomy cannot be repaired into a two-pump heart. Timing is a judgment call rather than a fixed birthday. The American Heart Association’s scientific statement on Fontan circulation notes that completion is generally performed between roughly 18 months and 4 years of age, once the lungs have grown enough to accept blood flow without a pump behind them.

Before the operation, the team gathers evidence that the passive circulation will work. That usually means a cardiac catheterization, a procedure in which a thin tube is threaded through a blood vessel to measure pressures inside the heart and lung arteries directly. Low pressure in the lung arteries, a ventricle that squeezes well, valves that do not leak badly, and lung arteries of adequate size are the features surgeons look for.

Children are commonly asked to wait, or occasionally steered toward a different plan, when those numbers are not yet favorable. High lung artery pressure, a weakened ventricle, a significantly leaking valve, narrowed lung arteries, or an active infection can all push the date back. Waiting is not a failure of the child or the parents; it is the team declining to build a passive circulation on top of resistance it cannot overcome.

A few children have anatomy or lung pressures that make a Fontan unlikely to succeed at any age. For them, alternatives discussed in neutral terms include staying at the Glenn stage for longer, heart transplantation, or medical management. The AHA statement is clear that each of these carries its own trade-offs and that the decision belongs to the child’s cardiology and surgical team, informed by the catheterization data and by how the child is growing and thriving.

What happens after a Fontan surgery in the first days in hospital?

Your child will wake in a cardiac intensive care unit, surrounded by more equipment than any parent wants to see. Much of it is temporary: a breathing tube that is often removed within the first day, thin pacing wires that let staff steady the heart rhythm if needed, intravenous lines for fluids and medicines, and one or more chest drains.

The drains deserve a word. After the Fontan, fluid tends to collect in the space between the lungs and the chest wall, a build-up doctors call a pleural effusion. It happens because the veins that now feed the lungs are running at higher pressure than before, and fluid weeps out of small vessels. The Cleveland Clinic lists persistent effusions as one of the most common early complications, and they are the usual reason a hospital stay stretches beyond the expected week or so. Drains stay in until the daily output falls to a level the team is comfortable with.

Nurses will encourage movement early, sometimes on the first or second day. Sitting up, dangling legs, then walking down the corridor all help the lungs expand and help the new circulation move blood. Pain is managed with a plan the team adjusts daily; parents are not expected to make those decisions.

Oxygen saturation, a percentage read from a small sensor on a finger or toe, is watched closely and is expected to be higher than before surgery, though not always at the level of a child with two ventricles, particularly if a fenestration was left open. Discharge usually follows once drains are out, oral medicines are settled, the child is eating and gaining ground, and parents have practiced the lifting and wound-care routine they will use at home.

Fontan surgery recovery weeks at a glance

Every child follows a different curve, and the surgical team’s instructions override anything printed here. Still, families ask for a map, and the ranges below reflect what mainstream sources such as the Cleveland Clinic and the AHA describe as typical.

Timeframe	What is usually happening	What parents are usually asked to do
Days 1–3	Intensive care; breathing tube removed; drains in place; first steps out of bed	Be present, offer comfort, learn the monitors, rest when you can
Days 3–14	Ward care; drains removed as output falls; oral medicines started; feeding rebuilds	Practice the scoop lift with nurses; learn wound care and medicine routine
Weeks 2–6	Home; incision closes; breastbone knitting; energy returns unevenly	Scoop lift only, no pulling on arms, no rough play, fluids offered often
Weeks 6–8	Breastbone typically healed on examination; follow-up echocardiogram	Ask the team before returning to climbing, contact play or car-seat changes
Months 3–6	Fenestration may be reviewed; activity largely back to baseline	Keep routine cardiology visits; note stamina, swelling and appetite

Two patterns are worth pointing out. First, the hospital stage is the one most likely to run long, almost always because of effusions rather than because anything went wrong with the operation itself. Second, the home stage is where parents carry the most responsibility with the least supervision, which is why the sections that follow spend their time on bone healing, lifting technique and fluids rather than on surgical detail.

Timeframes here are typical ranges, not promises. A child who needed drains for three weeks is not behind; a child home in eight days is not ahead. Progress is measured against the individual plan, not the table.

How does the sternum heal after open-heart surgery in a child?

To reach the heart, the surgeon divides the sternum, the flat breastbone in the center of the chest, lengthwise. This approach is called a median sternotomy. At the end of the operation the two halves are drawn back together and held with wire or heavy suture while the bone knits.

Bone healing is a slow, orderly process. Over the first two weeks a soft bridge of tissue forms across the cut. Over the following weeks that bridge mineralizes and hardens. The Cleveland Clinic and other mainstream sources describe the sternum as generally stable at about six to eight weeks in children, with full remodeling continuing for months afterward. Children tend to heal faster than adults because their bone is more metabolically active, but the six-to-eight-week window is still the standard planning horizon.

During that window the wires hold the halves in alignment, yet they do not make the bone strong. Any force that pulls the two halves apart, or twists them against each other, can disturb the healing bridge. That is the reason behind the rules about lifting under the arms, pulling a child up by the hands, and letting a child hang from monkey bars: each of those movements loads the shoulder girdle and, through it, the sternum.

Parents sometimes notice a faint click or shift when the child moves during the first weeks. A single soft click that does not hurt is usually reported at follow-up rather than treated as an emergency; persistent clicking, new pain, or a visible step in the bone is different and belongs in the section on when to call.

The skin incision closes far sooner than the bone beneath it, often within two weeks. A tidy scar is not proof that the sternum is ready. Until the team confirms healing, usually at the six-to-eight-week visit, the bone should be treated as fragile even when the surface looks fine.

How to lift your child safely after a sternotomy

The single most useful skill parents take home is the scoop lift. It replaces the reflex of grabbing a child under the armpits, a move that hoists the entire body weight through the shoulders and pulls the sternum halves apart.

The scoop works like this. Bring your child close before lifting rather than reaching. Slide one arm under the bottom and the other behind the back and shoulders, so the child’s weight rests in the cradle of your forearms. Keep the child’s arms folded across the chest or resting on your shoulder rather than raised. Lift with your legs, holding the child against your own torso. Set down the same way, lowering the bottom first and supporting the back until the child is fully seated or lying.

A few situations trip families up:

• Getting out of the bath: lift from behind and beneath, never by the hands, and have a towel ready so you are not juggling.
• Car seats: lower the child straight down into the seat while supporting the back; avoid twisting the child’s trunk to thread arms through straps.
• Stairs and cribs: lower the crib side or use a step so you are not reaching over a rail at arm’s length.
• Tantrums: a child who goes limp or arches is hard to scoop. Kneel, gather, and wait rather than grabbing an arm.

Older toddlers can be taught to hug a small pillow against the chest when they cough, sneeze or laugh, a technique adult heart patients also use because it braces the bone.

Ask the team how long to keep the scoop lift. Six weeks is a common instruction, tied to the sternal healing timeline described above, but some teams extend it, especially for heavier children or where the wound needed extra attention. Siblings, grandparents and daycare staff need the same demonstration, because the person most likely to lift under the arms is the one who never saw the nurse show you.

Why hydration matters so much in a Fontan circulation

In an ordinary circulation, the right ventricle compensates when a child gets a little dry. It squeezes harder and keeps blood moving to the lungs. A Fontan has no such reserve. Blood reaches the lungs only because the pressure in the veins is higher than the pressure in the lung arteries, and that venous pressure depends on how much fluid is in the system. Doctors call this a preload-dependent circulation, preload being the volume of blood returning to the heart.

Lose fluid, through vomiting, diarrhea, fever, a hot day at the park, or simply refusing to drink, and venous pressure falls. Less blood crosses the lungs, less reaches the single ventricle, and the child becomes pale, listless and short of breath far sooner than a child with two pumps would. The AHA statement singles out dehydration as a common, avoidable trigger of acute trouble in Fontan patients of all ages.

The practical translation is simple but relentless. Offer fluids often rather than in large amounts, because a recovering child rarely finishes a big cup. Keep water visible and reachable. Treat a stomach bug as a reason to phone the cardiology team early rather than to wait it out at home, since the threshold for needing intravenous fluids is lower than for other children.

Hydration cuts both ways, which is where families get confused. Immediately after surgery, while effusions are draining, some teams restrict fluids or use a diuretic, a medicine that helps the kidneys remove excess water, to reduce pleural fluid. Once drains are out and the child is home, the emphasis usually flips to maintaining intake. The same child can be told to limit fluids in week one and to push them in week four, and both instructions can be correct. When in doubt, ask which phase your child is in.

Which medicines are commonly used after the Fontan, and what do they do?

Discharge folders often contain several prescriptions, and parents reasonably want to know what each one is for. What follows describes classes of medicine and the reasoning behind them. It does not describe amounts or schedules, and nothing here should prompt a change to what the prescribing team has set.

Blood thinners are the most consistent theme. Blood moving slowly through a synthetic tube, without a pump behind it, is more prone to forming clots. The AHA statement notes that most centers use either an antiplatelet agent such as aspirin or an anticoagulant such as warfarin after the Fontan, with the choice depending on the child’s anatomy, whether a fenestration was left, and center practice. Evidence comparing the two approaches is limited and does not clearly favor one for all children, which is why practice varies.

Diuretics, described in the hydration section, are often used in the early weeks to help clear effusions and are frequently tapered as fluid settles. Some children go home on a medicine that relaxes lung blood vessels, intended to lower the resistance the passive circulation has to overcome. Reviews of these pulmonary vasodilators in Fontan patients show modest short-term improvements in exercise measures in some studies; the AHA describes the long-term benefit as uncertain, and they are not used routinely at every center.

A smaller group takes medicines that reduce the workload on the single ventricle or steady the heart rhythm.

Two practical points are universal. Blood thinners raise the stakes of falls and nosebleeds, so the team will explain what bleeding needs a call. And any new medicine from another prescriber, including over-the-counter products and herbal remedies, should be checked with the cardiology team first, because interactions with anticoagulants are common and can be serious.

Eating, sleeping, school and play in the fontan surgery recovery weeks

Appetite returns before energy does, and energy returns before stamina. Parents who expect a steady climb often feel alarmed by the zigzag. A child who ate well on Tuesday and slept all of Wednesday afternoon is usually recovering normally.

Food matters for two reasons beyond comfort. Healing bone and tissue need protein and calories, and a well-fed child drinks more, which serves the circulation. Small, frequent meals tend to work better than three large ones in the early weeks. Some children go home with temporary dietary advice about fat intake, particularly if fluid drained from the chest had a milky appearance, a sign of lymph leakage called chylothorax; that guidance comes from the team and usually lifts once drainage has stopped.

Sleep is often disturbed for a few weeks. Hospital routines, discomfort when lying flat, and plain fear all play a part. Extra pillows to raise the upper body can help; ask whether that is appropriate for your child.

Play should be gentle but not absent. Walking, floor puzzles, drawing and short outings all count as recovery. What the team will ask you to hold back on, typically until the six-to-eight-week check, is anything that loads the shoulders or risks a blow to the chest: climbing frames, wrestling siblings, swinging by the arms, backpacks worn on the shoulders, and contact sports for older children.

Return to daycare or school is a joint decision, usually a few weeks after discharge once the wound is closed and the child can manage a half day without collapsing in exhaustion. Staff need the lifting demonstration, the fluid plan, and a clear instruction that a Fontan child who becomes unwell with vomiting or fever should be picked up rather than watched. Bathing shifts from sponge washes to shallow baths once the incision is sealed, with full submersion and swimming deferred until the team agrees.

How risky is Fontan surgery, and how long does a Fontan last?

Honest answers to both questions require separating the operation from the circulation it creates.

The operation itself has become considerably safer over the decades. The AHA scientific statement reports that early mortality after Fontan completion in the current era is low at experienced centers, generally in the low single-digit percent range, a marked change from the early years of the procedure. Serious early complications include prolonged effusions, bleeding, rhythm disturbances, clot formation, and, uncommonly, early failure of the circulation requiring takedown or transplant evaluation. Your surgeon will discuss the specific risks for your child, which depend heavily on the preoperative catheterization findings.

The second question is harder. A Fontan is not a repair; it is a rearrangement that lets one ventricle do the work of two at the cost of chronically raised pressure in the veins. Over years, that pressure and the absence of a pump take a toll. The AHA statement describes a growing population of Fontan patients reaching adulthood, with survival into the third and fourth decades now common, while also documenting a steady rise in late complications: rhythm problems, liver changes from congestion, a protein-losing gut condition, and gradual decline in exercise capacity.

How long a particular Fontan lasts cannot be predicted at the time of surgery. What can be said, with evidence, is that lifelong follow-up with a congenital cardiology team changes the picture, because many late complications are treatable when caught early. The AHA recommends structured surveillance including periodic imaging, rhythm monitoring, liver assessment and exercise testing, transitioning to adult congenital care in the teenage years.

Framed that way, the question shifts from how long the circuit will last to how well it will be watched. The operation buys a childhood; the surveillance program is what protects the decades after it.

What are the symptoms of a failing Fontan?

Clinicians use the phrase failing Fontan for a circulation that is no longer delivering adequate blood flow at acceptable venous pressures. It is a diagnosis made by a cardiology team using imaging, catheterization and blood tests, not one parents can make at home. Knowing the broad patterns the team watches for is still useful, because they are the reasons routine follow-up visits ask the questions they do.

The most visible pattern is fluid retention. Because venous pressure is high, fluid leaks into tissues and cavities more readily than in other children: puffiness around the eyes on waking, swelling of the ankles or belly, or a return of chest effusions months after surgery. The liver, sitting directly downstream of the high-pressure veins, becomes congested over time; the AHA statement describes Fontan-associated liver disease as nearly universal on imaging in adults, which is why liver checks are built into surveillance even when the child feels well.

A second pattern involves the gut. In protein-losing enteropathy, high pressure in the lymph vessels of the intestine causes protein to leak into the bowel. Children may develop diarrhea, swelling from low blood protein, and poor growth. A related condition, plastic bronchitis, involves protein-rich material forming casts in the airways that the child coughs up. Both are uncommon but serious and are managed by specialist teams.

Rhythm disturbances, called arrhythmias, become more frequent with years of atrial stretch. Palpitations, fainting, or a sudden drop in stamina prompt rhythm monitoring.

The last pattern is the quietest: a gradual fall-off in what the child can do. A ten-year-old who used to keep up on the playground and no longer can is worth mentioning at the next visit, even if nothing else has changed. None of these findings means the circulation is failing; each is a reason for the team to look more closely.

What people often get wrong about Fontan recovery

The myth that the scar is the wound. Skin closes in about two weeks; bone takes six to eight. Parents relax the lifting rules when the incision looks healed and are surprised when the team says to keep going. The sternum, not the skin, sets the schedule.

The myth that lower oxygen readings mean something is wrong. Many Fontan children, especially those with an open fenestration, run oxygen saturations that would alarm a nurse on a general ward. The team will tell you your child’s expected range. A number inside that range is normal for this circulation, and comparing it to a classmate’s is not helpful.

The myth that fluid restriction continues at home. The early hospital phase sometimes limits fluids to help drain effusions. Once home, the circulation usually needs the opposite. Carrying a week-one instruction into week five can leave a child chronically dry.

The myth that the Fontan fixes the heart. It does not. It reroutes blood so that one ventricle can manage. The word repair is used loosely, and it sets families up for confusion when lifelong follow-up is recommended for a child who seems entirely well.

The myth that exercise is dangerous. Once the sternum has healed, regular physical activity is encouraged; the AHA statement describes exercise training as safe and beneficial in Fontan patients, with the caveat that competitive or contact sports are discussed individually. Muscle activity in the legs and abdomen actively helps push blood through the passive circuit.

The myth that a stomach bug is just a stomach bug. For most children it is. For a Fontan child, vomiting and diarrhea remove exactly the fluid the circulation needs, and the margin before things go wrong is narrower. Early contact with the team is not overreaction; it is the plan.

The myth that all Fontan children follow the same path. Anatomy, ventricle type, fenestration status and lung pressures all differ. Comparing timelines in online groups can reassure or frighten, but it rarely informs.

Questions to ask your care team before and after discharge

The most useful questions are specific to your child rather than to the operation in general. Write the answers down; discharge conversations happen fast, and two exhausted parents will remember different halves.

Before leaving hospital:

• What oxygen saturation range is normal for my child, and at what reading should I call?
• Was a fenestration left open, and what is the plan for reviewing it?
• Which blood thinner is my child on, what bleeding should prompt a call, and which common medicines or foods interact with it?
• Are we currently restricting fluids or encouraging them, and when will that change?
• How long should we use the scoop lift, and who else needs to be shown?
• Is there any dietary restriction, and for how long?
• Who do we phone at 2 a.m., and what is the number?

At the first follow-up visit:

• Has the sternum healed enough to lift the activity restrictions? Which ones?
• When can my child return to daycare or school, swim, and ride in a car seat with the straps adjusted normally?
• What does the echocardiogram show about the ventricle, the valves and the new connection?
• What is the long-term surveillance schedule, including liver and rhythm checks, and when does transition to adult congenital care begin?
• What signs of dehydration or fluid retention should we watch for at home, and what is the threshold for contacting you?
• Are vaccinations, including influenza and others recommended for children with heart disease, on schedule?

One question is worth asking at every visit for years: what has changed since last time, and what are you watching? It invites the team to share the reasoning behind the tests rather than only the results, and it teaches parents to notice the same things the clinicians notice.

When to call your doctor

The discharge team will give you a specific list and a number to call. The signs below are the ones most mainstream sources, including the Cleveland Clinic and the AHA, flag as needing prompt contact in the weeks after a Fontan.

Seek emergency care immediately if your child has severe difficulty breathing, becomes blue or gray around the lips and face beyond their usual color, faints or cannot be roused normally, or develops chest pain with a visible shift or step in the breastbone.

Call the cardiology team the same day for a fever, since infection around the wound or inside the chest needs early assessment; for redness, warmth, swelling, opening or discharge at the incision; for breathing that is faster or more labored than usual at rest, or a new persistent cough; for new or increasing swelling of the face, belly, hands or feet, or a sudden weight gain over a day or two, which can signal returning fluid; for vomiting or diarrhea lasting more than a few hours, or a child who cannot keep fluids down, because dehydration lowers the venous pressure this circulation relies on; for any bleeding that will not stop with gentle pressure, blood in urine or stool, or large unexplained bruises while on a blood thinner; for a heartbeat the child describes as racing or fluttering, or that you notice as irregular; for oxygen readings persistently below the range the team gave you; and for a child who is unusually pale, sweaty, floppy or refusing to feed.

A softer category also matters: a general sense that something is off, even without a named symptom. Parents of children with single-ventricle hearts are usually right about that instinct more often than they are wrong, and cardiology teams would far rather take a call that turns out to be nothing.

Every judgment about whether a sign is serious, and every decision about what to do next, rests with the treating team. The list above is the prompt to pick up the phone, not a substitute for the conversation.

Frequently asked questions

What happens after a Fontan surgery?

Children wake in intensive care with a breathing tube, chest drains and monitoring lines, most of which come out over the first few days. Drains stay until chest fluid slows, then oral medicines are settled and parents practice lifting and wound care before discharge, usually within one to two weeks. Home recovery centers on sternum healing over six to eight weeks.

What is a typical fontan procedure recovery time for a toddler?

Typical ranges are about one to two weeks in hospital, then six to eight weeks for the breastbone to knit, with most children back to ordinary play by around two to three months. Prolonged chest effusions can extend the hospital stage. These are ranges reported by mainstream sources, not promises; the surgical team sets each child’s timeline.

What are the symptoms of a failing Fontan?

Clinicians look for fluid retention such as puffiness or a swollen belly, diarrhea and poor growth from protein loss through the gut, a persistent cough with airway casts, rhythm disturbances, and a gradual decline in stamina. A failing Fontan is diagnosed by a cardiology team using imaging and tests; these patterns are reasons to be assessed, not a diagnosis.

How long does a Fontan last?

There is no fixed lifespan for a Fontan circulation. The AHA reports that survival into the third and fourth decades is now common, while late complications involving the liver, gut and heart rhythm become more frequent over time. Lifelong follow-up allows many of these to be treated early, which is why surveillance rather than the operation itself shapes the long-term picture.

How risky is Fontan surgery?

Early mortality after Fontan completion at experienced centers is now in the low single-digit percent range according to the AHA scientific statement, far lower than in the procedure’s early years. Serious early complications include prolonged effusions, clots, rhythm problems and bleeding. Individual risk depends heavily on preoperative pressures and ventricle function, which the surgical team will discuss.

What are the main fontan surgery risks parents should understand long term?

Beyond the operation, the circulation itself carries risks over years: congestion-related liver disease, protein-losing enteropathy, plastic bronchitis, atrial rhythm disturbances, clot formation and declining exercise capacity. These arise from chronically raised venous pressure rather than surgical error. Structured follow-up with imaging, rhythm and liver checks is the recommended way to detect them early.

Why can't I lift my child under the arms after heart surgery?

Lifting under the armpits hoists the child’s full weight through the shoulder girdle, which pulls the two halves of the divided breastbone apart while the bone is still knitting. Wires hold alignment but do not make the bone strong. The scoop lift, supporting bottom and back, keeps that force off the sternum for the six to eight weeks it typically needs.

Why does dehydration matter more for a child with a Fontan?

Blood reaches the lungs in a Fontan only because venous pressure exceeds lung artery pressure, and that pressure depends on fluid volume. With no ventricle behind the lungs to compensate, even modest fluid loss from vomiting, diarrhea, fever or heat can sharply reduce blood flow. Teams therefore ask families to offer fluids often and to call early during stomach illnesses.

What is a fenestration and will it be closed?

A fenestration is a small deliberate opening the surgeon leaves between the new venous channel and the heart. It acts as a pressure release in the early weeks, easing effusions at the cost of slightly lower oxygen levels. Many teams review it months later and may close it in a catheter procedure if the child is doing well; the decision rests with the cardiology team.

When can my child go back to school or daycare after the Fontan?

Return is usually a joint decision a few weeks after discharge, once the incision is sealed and the child can manage a half day without exhaustion. Staff need the scoop-lift demonstration, the fluid plan, and clear instructions to send the child home if vomiting or fever develops. Climbing and contact play typically wait until the team confirms sternum healing.

References

• Hypoplastic Left Heart Syndrome (MedlinePlus Medical Encyclopedia)
• Congenital heart disease: Treatment (NHS)

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.