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I’m not a pediatric anesthesiologist. But I am a mom-anesthesiologist.
Like many parents, I found myself sitting on the other side of the consent form when one of my children needed ear tubes under general anesthesia. I’ve participated in countless cases like this during my training. Intellectually, I understood the process. Professionally, I trusted the safety protocols.
But as a parent, it felt different.
In the back of my mind, I remembered hearing about studies suggesting possible effects of general anesthesia on brain development in very young children. I hadn’t paid much attention at the time, my focus has always been adult cardiac anesthesia. But now, it wasn’t theoretical anymore. It was my child.
To calm my own fears, I did what I always do when something truly matters: I went back to the data.
I hope that sharing both my experience and what I found in the evidence helps make this process a little easier as your little one goes through surgery and anesthesia.
Why Parents Should Worry About Anesthesia Under Age 3
In 2016, the FDA issued a Drug Safety Communication warning that repeated or lengthy use of general anesthetic and sedation drugs in children younger than 3 years or in pregnant women during their third trimester may affect brain development.
Research since the original warnings in 2012 has shown that several common anesthesia drugs can cause brain cell damage in young animals. For example, medicines like propofol (used to help people fall asleep quickly for surgery), isoflurane (a gas often used in the operating room), and ketamine (sometimes used for pain or sedation) have all been linked to brain cell death (neurotoxicity) and changes in brain structure in baby monkeys and other animals. When animals are given these drugs while their brains are still growing, some later have trouble with memory and attention. How much harm is done depends on the animal’s age and how much of the drug they receive. Scientists have seen fewer connections between brain cells and less growth in important areas of the brain after these exposures. However, it’s still not clear how much this applies to children.
Despite ongoing research, questions about the short- and long-term effects of anesthetic drugs on the developing brain remain largely unanswered.
There is still a significant lack of high-quality research in this area, which limits our understanding. As a result, whenever a high-profile study is published, it often reignites public concern about anesthesia and brain development. However, these studies frequently highlight potential risks without offering strong or definitive evidence of harm.
What Research Actually Shows
Single Short Exposure
Since these warnings came out, both FDA and anesthesia community set a mission goal to study this further and understand the effects of early exposure to anesthesia a bit better.
Several major studies came out, including GAS, PANDA, and MASK studies.
The GAS Study
This was an international, multicentre, randomised, controlled equivalence trial looking at neurodevelopmental outcome at 5 years of age after general vs awake-regional anesthesia in infancy.
From 2007 to 2013, babies were randomly given either regional anesthesia (359) while awake or general anesthesia (363) for surgery, and their IQ scores at age 5 were nearly the same. This study shows there was no difference in brain development between the two groups.
The PANDA Study
The PANDA study compared siblings where one had surgery with anesthesia as a baby and the other did not. When tested years later, both groups had similar IQ scores and no differences in memory, attention, or behavior. This means a single, short exposure to anesthesia in young children did not affect their brain development.
Multiple or Prolonged Exposures
The MASK Study
The MASK study from 2018, which enrolled from 1994-2007 looked at 997 kids who had no anesthesia (411), one anesthesia (380), or several anesthetic exposures (206) , and tested them when they were older. They found that IQ scores were about the same, no matter how much anesthesia the children had. Kids who had anesthesia more than once were a little slower with things like hand skills and quick thinking, and their parents noticed more problems with focus and behavior. Still, for most kids, a single anesthesia didn’t seem to hurt their brain development.
Although this study is one of the largest and most detailed of its kind, it has some important limitations that are applicable for most other similar observational studies.
Because it was an observational study, it cannot prove that anesthesia itself causes developmental differences since children who need surgery may already differ in ways that affect development. Other factors related to surgery, such as illness, stress, or pain, may also play a role.
Ongoing Research and the Need for Caution
There is significant interest among both the anesthesia community and the public in gathering additional data regarding the effects of anesthesia on young children. As a result, more studies are expected in the future, which will hopefully shed light on many unresolved questions in this area.
In the meantime, it is important to remember that “absence of evidence is not evidence of absence.”
This cautious perspective should guide decision-making about whether exposure to anesthesia is necessary, recognizing that unanswered questions remain and more research is needed.
The Bottom Line on Early Anesthesia Exposure and Brain Development
If your child truly needs surgery, current evidence suggests that their neurodevelopment is likely to progress normally. Studies such as GAS, PANDA, and MASK have shown that a single, short exposure to anesthesia in young children does not appear to negatively impact their cognitive development or behavior. Therefore, parents should not feel overly anxious about the potential long-term effects on their child’s brain when surgery is medically necessary.
However, it remains important to exercise caution and thoughtfully consider whether the procedure is immediately required. While research is reassuring, unanswered questions still exist, and more studies are expected in the future. Parents are encouraged to ask their care team about the urgency of recommended surgical procedures and weigh the risks and benefits carefully. This balanced approach ensures that decisions are made in the best interest of the child’s health and well-being.
Beyond Brain Development: Is Anesthesia Safe for Toddlers?
While there are ongoing concerns about how anesthesia might affect a young child’s developing brain, the research reviewed so far hasn’t shown strong evidence of lasting neurodevelopmental harm. However, there are other real risks associated with anesthesia that anesthesiologists face every day, and it’s important for parents to understand them.
Personally, I’ve always found pediatric anesthesia challenging because the stakes are so high. The thought of dealing with a serious complication, or worse, losing a child under my care, was too daunting. Children have always held a special place in my heart, and I have a huge respect for my pediatric anesthesia colleagues.
The risks associated with anesthesia in children depend on whether general or regional techniques are used, as well as the type of surgery or procedure being performed.
How safe is anesthesia for young children?
One of the biggest worries for pediatric anesthesiologists is what’s known as a “lost airway.” After a child is given anesthesia and falls asleep, they stop breathing as expected, so an anesthesiologist needs to “secure the airway”, meaning help the child breathe using a mask, an LMA (a mask that sits in the mouth), or an endotracheal tube (a tube placed in the airway). If we can’t do this quickly enough, it can lead to cardiac arrest from lack of oxygen. Fortunately, this is rare, mainly because pediatric anesthesiologists have specialized training, usually an extra year dedicated to caring for children and handling these situations on daily basis.
Kids are also more likely to experience laryngospasm as they wake up, which can cause the vocal cords to clamp shut and block breathing. This is especially common in children with “reactive” airways, like those with asthma or a recent cold. That’s why it’s vital to share all your child’s health details with your anesthesiologist, they need to be fully prepared for anything.
Laryngospasm isn’t just an anesthesia risk, it can happen during everyday activities, like swimming, if water irritates the vocal cords. If you ever see this happen, remember your basic life support skills and act quickly.
Risk of Aspiration and the Importance of Fasting Guidelines
Another critical risk that I believe is not always adequately explained to parents is the risk of aspiration. When a child is put to sleep for surgery, their muscles relax completely. If there is any food or liquid remaining in the stomach, it can travel back up the esophagus and enter the airway. Because the stomach contents are acidic, this can cause serious injury to the lungs if inhaled. This is why you will receive specific instructions before surgery, known as “NPO guidelines”, which stands for “nothing by mouth”, and be asked about the last time your child ate or drank. These precautionary steps are essential to minimize the risk of aspiration and protect your child’s safety during anesthesia.
Remember, your child can have clear liquids (like water or apple juice, but not orange juice with pulp) up to 2 hours before surgery…and there has been a growing trend to push this cut-off to 1 hour before surgery.
Emergence Delirium After Anesthesia in Children
Another common situation that parents may not be fully prepared for is the emergence delirium. This is is a temporary state of confusion and agitation that some children experience as they wake up from anesthesia. It can appear crying, thrashing, or disorientation, even though the child is not fully aware of their surroundings.
This reaction is most common in younger children and typically resolves on its own within minutes as the anesthetic medications wear off, and sometimes requires treatment with sedatives such as dexmedetomidine.
While it can be distressing for parents to witness, emergence delirium is generally short-lived and does not cause long-term harm.
Should I Delay My Child’s Surgery?
The short answer: it depends, there’s no one-size-fits-all here. Every child, every procedure, and every circumstance is unique. Like most things in medicine, very few decisions are absolute. What matters most is doing your own due diligence as a parent.
- Ask questions, lots of them. Don’t hesitate to dig deep into the risks and benefits of delaying the surgery versus proceeding as scheduled.
- Get informed. Make a clear pro/con checklist for your situation, and consider what truly matters to you and your family after gathering all the facts.
- Remember, surgeons are trained to operate; it’s what they do. In my experience, younger surgeons may lean more toward recommending surgery right away, while seasoned professionals might be more open to waiting or considering non-surgical options.
- That’s why it’s so important to seek out multiple opinions. If you are dealing with a non-emergent situation, take the time to hear from different experts and weigh their advice. It’s all part of doing your homework and making the most informed decision possible for your child.
What Parents Should Ask Before Surgery
- Is the procedure truly necessary now?
- Can surgeries be combined to avoid multiple anesthetics?
- How long will my child be under anesthesia?
- Is a pediatric anesthesiologist involved?
- How will my child receive anesthesia (mask vs IV, general vs regional)?
- How is the pain going to be managed after surgery?
- What are the most common risks for this procedure?
- How will nausea or vomiting be prevented?
- When will my child be allowed to eat and drink?
- How long will the IV stay in?
- How long should we expect to stay in recovery or the hospital?
- What symptoms after we go home should prompt a call to the doctor?
Key The Take-Home Message for Parents
Hearing that your child needs anesthesia can feel frightening, especially when headlines mention possible effects on brain development.
Fortunately, the best available evidence suggests that a single, short exposure to anesthesia in young children is unlikely to cause long-term cognitive problems.
When surgery is necessary, the benefits of treating the underlying condition usually outweigh the theoretical risks of anesthesia. The most important step parents can take is to ask questions, share their child’s health history, and work with a team experienced in caring for children.