Is patent ductus arteriosus surgery dangerous in children

Patent ductus arteriosus (PDA) is one of the most common congenital heart defects affecting newborns. It occurs when a small blood vessel connecting the aorta and the pulmonary artery remains open instead of closing naturally after birth. In some cases, this condition may not cause noticeable symptoms. However, if the duct is large or remains open for a prolonged period, it can place extra strain on the heart and lungs and negatively affect the child’s growth and overall health.With modern medical advances, PDA closure has become a safe and highly effective procedure. In most cases, it can be performed using cardiac catheterization without the need for open-heart surgery. This intervention helps improve heart function, reduce symptoms, and give the child the opportunity to live a normal, healthy life without future complications.In this article from Dalili Medical, we will explore in detail the reasons for performing PDA closure, how the procedure is done, its different types, success rates, recovery period, and the most important tips to ensure complete healing.

How to Prepare for Patent Ductus Arteriosus (PDA) Closure

Proper preparation for PDA closure is essential to ensure the safety of the child and the success of the procedure. Below are the most important preparation steps:

1. Consultation with a Pediatric Cardiologist

Before the procedure, it is necessary to visit a pediatric cardiologist or a heart specialist experienced in congenital heart defects. During this consultation, the doctor will:

Review the child’s complete medical history
Perform a physical examination
Determine which diagnostic tests are required before the procedure

This step helps the medical team evaluate the child’s condition and select the safest and most effective treatment method.

2. Diagnostic Tests

The child may need several tests to assess the size of the duct and evaluate heart function, including:

Echocardiogram: Provides detailed images of the heart structure and shows the size of the duct and blood flow
Chest X-ray: Helps visualize the heart size and evaluate the lungs
Electrocardiogram (ECG): Measures the electrical activity of the heart and detects rhythm abnormalities

These tests help determine whether catheter closure or surgery is the best option.

3. Pre-Procedure Instructions

Before the procedure, parents must follow important medical instructions, such as:

Fasting: The child should not eat or drink for 6–8 hours before the procedure, especially if general anesthesia will be used
Medication adjustments: Some medications may need to be temporarily stopped or adjusted, particularly heart medications or blood thinners
Allergy information: Inform the medical team about any allergies to medications, anesthesia, or medical materials

Following these instructions reduces the risk of complications.

4. Transportation Arrangements

Because anesthesia or sedation is used during PDA closure:

A responsible adult must accompany the child
The child should not engage in strenuous activity for at least 24 hours after the procedure
The child will need supervision during the first day after discharge

This ensures a safe recovery period.

5. Emotional Preparation

Psychological preparation is very important for both the child and parents. You can help by:

Encouraging your child to express fears or concerns
Explaining the procedure in a simple and reassuring way
Asking the medical team questions to fully understand the procedure

Reducing anxiety helps improve the child’s overall experience and recovery.

6. Post-Procedure Care Plan

Before leaving the hospital, discuss the follow-up plan with your doctor. This plan may include:

Medications the child must take after the procedure
Temporary activity restrictions
Follow-up appointments and repeat echocardiograms

Regular follow-up ensures the duct remains fully closed and the heart functions normally.

Methods of Patent Ductus Arteriosus (PDA) Closure

Patent ductus arteriosus (PDA) is a blood vessel connecting the aorta and pulmonary artery. It is normal during pregnancy but should close shortly after birth. If it remains open, it can cause abnormal blood flow, placing extra strain on the heart and lungs.

The method used to close the PDA depends on several factors, including:

The size of the duct
The shape of the duct
The child’s age
The child’s overall health condition

The primary goal is to close the duct safely while preserving normal heart and lung function.

First: Closure of Small PDA

Appropriate Treatment Options: Monitoring or Catheter Closure

1. Observation (Monitoring Only)

This approach is used when:

The duct is very small
The child has no symptoms
The heart is functioning normally

In many cases, small PDAs close naturally within the first few months of life without medical intervention.

Regular monitoring using echocardiography ensures there are no complications.

2. Catheter Closure Using a Coil

If the duct does not close naturally, catheter closure using a small metal coil may be recommended.

Procedure Overview:

A thin catheter is inserted through a blood vessel in the thigh
The catheter is guided to the heart and duct
A small coil is placed inside the duct
The coil blocks abnormal blood flow and allows the duct to close permanently

Advantages of Catheter Closure for Small PDA

Minimally invasive procedure
No surgical incision required
Short hospital stay
Faster recovery time
Very high success rate
Minimal discomfort compared to surgery

Most children recover quickly and return to normal activities within a short period.

Closure of Moderate and Large PDA

Second: Closure of Moderate PDA

Recommended Method: Catheter closure using a device

Procedure Steps:

A catheter is inserted through a vein in the thigh
The catheter is guided to the heart
A small closure device is placed to seal the duct

Suitable For:

Most children
Moderate-sized PDA

Success Rate: More than 95%

Third: Closure of Large PDA

Options:

Catheter closure: If the duct size and shape are suitable, a larger closure device is used
Surgery: If the duct is too large or the shape is not suitable for catheter closure

Indications for Surgery:

Very large PDA
Shape unsuitable for catheter closure
Very young infants

Surgical Steps:

A small incision is made on the side of the chest
The duct is ligated or closed

Fourth: PDA Treatment in Premature Infants

First-Line: Medication

Drugs such as ibuprofen or indomethacin can help close the duct without surgery
If medication fails, catheter closure or surgery is considered

Fifth: Choosing the Method Based on PDA Type

PDA Type	Recommended Treatment
Small	Observation or catheter with coil
Moderate	Catheter closure using a device
Large	Catheter closure or surgery
Premature infants	First-line medication
Complex morphology	Often surgery

Advantages of Catheter Closure Compared to Surgery

No surgical incision needed
Less pain
Faster recovery
Hospital discharge often within 24 hours

Indications for PDA Treatment

Not all PDAs require immediate intervention. Doctors recommend treatment in the following cases:

Presence of Symptoms in the Child
Symptoms include:

Rapid breathing
Difficulty feeding
Poor weight gain
Fatigue during activity
Frequent respiratory infections

Large PDA
Large ducts may cause:

Increased blood flow to the lungs
Overloading of the heart muscle
Heart failure if left untreated

Impact on Heart or Lungs
If tests such as echocardiography show:

Heart enlargement
Pulmonary hypertension
Treatment is necessary to prevent serious complications

Failure of the Duct to Close Over Time

In premature infants, doctors may wait briefly to see if the duct closes naturally
If it remains open, catheter or surgical closure is performed

Prevention of Future Complications
Treatment can also prevent:

Infective endocarditis
Persistent pulmonary hypertension
Heart muscle weakening

Types of PDA in Children

PDA can be classified by size, effect on the heart and lungs, anatomical shape, and age, which helps determine the urgency of treatment.

1. PDA by Size

Small PDA: Tiny opening, usually asymptomatic, may close spontaneously, low risk, often requires only monitoring
Moderate PDA: Slightly larger, may cause mild symptoms like rapid breathing or fatigue during feeding, may require catheter closure
Large PDA: Large opening, causes clear symptoms (severe breathlessness, poor weight gain, heart strain), requires urgent closure (catheter or surgery)

2. PDA by Functional Impact

Silent PDA: Very small, no symptoms, detected by echocardiogram
PDA affecting heart and lungs: Increases lung blood flow, can lead to heart enlargement
PDA with complications: Causes pulmonary hypertension and affects heart function, requiring prompt intervention

3. PDA by Anatomical Shape (Krichenko Classification)

Type A: Conical, most common
Type B: Short and wide
Type C: Tubular
Type D: Complex
Type E: Long and narrow

This classification helps select the most suitable closure method, especially for catheter procedures.

4. PDA by Age

Premature infants: Common, may respond to medication
Full-term infants: Less common, usually require catheter closure
Adults: Rare, often diagnosed late

Contraindications for PDA Closure

Some children are not suitable for PDA closure, or the procedure may be temporarily risky:

Severe Pulmonary Hypertension:

High lung pressure may make the PDA temporarily necessary for blood flow
Closing it in this case can worsen heart function

Eisenmenger Syndrome:

Advanced condition with reversed blood flow and low oxygen
PDA closure is usually dangerous

Other Congenital Heart Defects Requiring PDA:

Some complex heart defects need the PDA to maintain blood flow to the lungs
Closing it could harm the child

Severely Weak Heart Function:

Sudden closure can overload the heart

Active Infection:

Bloodstream infections or systemic infections must be treated first

Extreme Prematurity:

Very premature infants are at higher risk from anesthesia and procedures

Allergic Reactions:

Children allergic to closure devices or anesthesia require alternative planning

Uncontrolled Medical Conditions:

Diabetes or high blood pressure should be stable before the procedure

Poor General Health:

Chronic illness or weak overall condition may prevent tolerance of the procedure

Difficulty with Post-Procedure Care:

Families unable to follow medication or follow-up instructions may not be suitable candidates

Risks and Complications of PDA

If a PDA is not treated timely, complications can range from mild to severe depending on duct size, age, and its effect on the heart and lungs.

Heart Muscle Strain and Enlargement

Blood from the aorta flows back into the lungs instead of the body
Causes extra workload on the heart, leading to enlargement and reduced pumping efficiency
Untreated → may cause heart failure

Pulmonary Hypertension

Increased blood flow to the lungs
Can damage lung vessels and cause breathing difficulties
One of the most dangerous complications if untreated early

Congestive Heart Failure

Due to persistent heart strain
Symptoms: rapid breathing, severe fatigue, poor feeding in infants, sometimes body swelling
Requires urgent treatment

Poor Growth in Children

Large PDA may lead to slow weight gain, delayed growth, and reduced activity
Energy is consumed to compensate for heart inefficiency

Recurrent Lung Infections

Increased lung blood flow can cause repeated chest infections, bronchitis, or hospital admissions

Infective Endocarditis

Serious infection of the heart lining
Caused by turbulent blood flow and potential bacterial entry
Rare but severe complication

7. Eisenmenger Syndrome

Eisenmenger syndrome is one of the most serious complications of untreated PDA over a long period.

It can cause:

Reversal of blood flow direction
Low oxygen levels in the body
Bluish lips and skin (cyanosis)

At this stage, treatment becomes more complex and requires specialized care.

Recovery After PDA Closure

Recovery after PDA closure depends on the treatment method and the child’s condition before the procedure. Most children improve quickly and can live a completely normal life.

1. Recovery After Cardiac Catheterization (Most Common)

First 24 hours:

Child is monitored in the hospital
Heart rate and breathing are observed
Complete rest to avoid bleeding at the catheter site (usually the thigh)

After 2–3 days:

Gradual return to normal activity
Minimal or no pain
Catheter site heals quickly

After 1 week:

Most children are fully recovered
Can resume normal life

Total recovery time: 3 days to 1 week

2. Recovery After Surgery

First 2–3 days:

Stay in the hospital for observation
Mild pain at the surgical site
Pain relief medication as needed

After 2 weeks:

Wound healing well
Noticeable improvement in breathing and activity

After 4–6 weeks:

Full recovery
Return to all normal activities

3. Recovery After Medication (For Premature Infants)

No incision or surgical intervention
Child is monitored with echocardiography
PDA may close over several days to weeks

Expected Recovery Timeline

Time Period	What Happens
First 24 hours	Hospital monitoring
2–3 days	Gradual improvement and return to activity
1 week	Near-complete recovery after catheterization
2–3 weeks	Good recovery after surgery
4–6 weeks	Full recovery after surgery
1–3 months	Echocardiography follow-up to confirm closure

Signs of Normal Recovery

Improved breathing
Increased activity and movement
Better feeding and appetite
Healthy weight gain
Disappearance of heart strain symptoms

Post-PDA Closure Care Tips

Proper care after PDA closure is essential to ensure full recovery and prevent complications. Following medical instructions helps the child return to normal life safely, whether the closure was done by catheter or surgery.

1. Caring for the Catheter or Surgical Site

After Catheterization:

Keep the catheter site (usually the thigh) clean and dry
Avoid pressure on the site for 3–5 days
Watch for redness or swelling

After Surgery:

Keep the surgical wound clean and dry
Change dressings according to doctor’s instructions
Avoid water contact until the doctor allows it

2. Physical Activity

Allow the child to rest in the first few days
Gradual return to normal activity over several days
Avoid vigorous activities for:
- 1 week after catheterization
- 4–6 weeks after surgery
Infants usually regain normal activity quickly