Acid-Base Imbalance in Children
By Dr. Punit Chhajed, Consultant – Paediatric Nephrologist, Pune
Our bodies are like finely tuned machines, and just like machines need the right fuel and balance to run smoothly, our body too depends on a proper balance of many substances. One such important balance is the acid-base balance. When this balance is disturbed, it can affect many organs – especially in children whose systems are still developing.
Let’s understand what acid-base imbalance means, why it happens, and how it can be treated.
Our blood and body fluids are neither too acidic nor too alkaline. They need to maintain a very specific pH level, which is a measure of how acidic or basic (alkaline) a substance is. For the human body, the ideal blood pH is slightly alkaline, around 7.35 to 7.45.
The body uses different systems – mainly the lungs, kidneys, and a network of chemical buffers – to keep this pH stable. If this balance shifts too much in either direction, it leads to an acid-base imbalance.
Acid-base balance refers to the process of maintaining a stable pH level in the body’s fluids, primarily blood, by regulating the balance between acids and bases. This balance is crucial for optimal cellular function and overall health, as deviations can lead to potentially life-threatening conditions. The body employs several mechanisms, including respiratory and renal systems, to maintain this balance
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Types of Acid-Base Imbalances
1. Acidosis – Too much acid in the body
- Metabolic Acidosis: Caused when the body produces too much acid or the kidneys are unable to remove enough acid.
Respiratory Acidosis: Happens when the lungs cannot remove enough carbon dioxide (CO₂), which increases acidity.
2. Alkalosis – Too much base (alkali) in the body
Metabolic Alkalosis: Occurs when there’s a loss of acid (for example, due to vomiting) or a buildup of base.
Respiratory Alkalosis: Happens when the lungs remove too much CO₂, making the blood too alkaline.
Why is Acid-Base Balance Important in Children?
Children, especially infants and young kids, have developing organs. Their kidneys and lungs are still maturing, so they may not regulate acid and base as efficiently as adults. That’s why acid-base imbalances can affect them more quickly and more severely.
As a paediatric nephrologist, I often see this in children with kidney problems. But other conditions can also lead to imbalance.
Causes of Acid-Base Imbalance in Children
Some common causes include:
- Diarrhea or vomiting: Can lead to loss of acid or base.
- Kidney disease or poor kidney function
- Respiratory illnesses like asthma or pneumonia
- Uncontrolled diabetes (especially Type 1)
- Severe infections (sepsis)
- Certain medications
- Dehydration
- Poisoning or ingestion of harmful substances
Symptoms to Watch Out For
The symptoms depend on whether it is acidosis or alkalosis. Some warning signs include:
Acidosis:
- Fast or deep breathing
- Fatigue or drowsiness
- Confusion
- Headache
- Nausea or vomiting
Low blood pressure
Alkalosis:
- Muscle cramps or twitching
- Tingling in fingers or toes
- Dizziness or fainting
- Nausea
- Difficulty breathing
In severe cases, both types of imbalances can lead to seizures, coma, or even become life-threatening if not treated on time.
How Is It Diagnosed?
As a paediatric kidney specialist, I rely on a few key tests to identify acid-base imbalances:
- Blood gas test (VBG): Measures pH, carbon dioxide, and oxygen levels.
- Serum electrolytes: Checks levels of sodium, potassium, chloride, and bicarbonate.
- Urine tests: Help understand how kidneys are functioning.
- Other blood tests to identify underlying infections, diabetes, or toxins.
A detailed history and physical examination are also essential to find out the root cause.
How Is It Treated?
Treatment depends on the type and severity of the imbalance and its cause.
- For metabolic acidosis, we may give sodium bicarbonate (a base) to neutralize the acid.
- In addition the child may need supplementation of salts like sodium or potassium as well.
- In some cases, we may also feel the need to use medications which can help decrease the amount of urine passed especially if it was more earlier (polyuria)
- Additional supplementation to keep the bones healthy
- For alkalosis, we may give fluids, adjust medications, or address causes like vomiting or loss of electrolytes.
- In kidney-related cases, we may need to adjust diet, medications.
- The goal is not just to correct the pH but to identify and treat the underlying cause.
Can It Be Prevented?
While not all cases can be prevented, here are some ways to reduce the risk:
- Keep your child hydrated, especially during illness.
- Manage chronic conditions like asthma or diabetes properly.
- Avoid self-medicating with over-the-counter drugs or home remedies.
- Seek prompt medical care if your child is vomiting, having breathing issues, or seems very drowsy or confused.
Why Choose a Paediatric Nephrologist?
Acid-base imbalances often involve the kidneys, and in children, managing these cases needs specialized care. As a paediatric nephrologist based in Pune, I focus on kidney-related disorders in infants, children, and adolescents – including acid-base and electrolyte imbalances.
With proper diagnosis, supportive care, and a personalized treatment plan, most children recover well. However, early detection is key.
Final Words from Dr. Punit Chhajed
If your child shows any unusual symptoms – rapid breathing, drowsiness, weakness,repeated vomiting , abnormal urine volumes or bony deformities – don’t ignore them. Acid-base imbalance might sound technical, but it’s something that can be managed well if caught in time.
At my clinic, we focus not just on treating the symptoms but also on understanding the root cause, educating parents, and preventing future episodes. With the right care, your child can be healthy, active, and thriving.
Dr. Punit Chhajed
Consultant – Paediatric Nephrology | Pune
Dr. Punit Chhajed is a highly experienced paediatric kidney specialist offering expert care in kidney diseases, urinary problems, dialysis, and acid-base or electrolyte disorders in children. With a compassionate approach and a focus on accurate diagnosis and family-friendly communication, he ensures your child receives the best possible care.
