Life-threatening asthma in children: treatment with sodium bicarbonate reduces PCO2

Corinne M P Buysse1, Johan C de Jongste, Matthijs de Hoog

  • 1Division of Pediatric Intensive Care, Erasmus MC-Sophia Children's Hospital, Dr. Molewaterplein 60, 3015 GJ Rotterdam, the Netherlands. c.buysse@erasmusmc.nl

Chest
|March 15, 2005
PubMed

Insights

Sodium bicarbonate administration significantly reduced carbon dioxide levels in children with life-threatening asthma (LTA). This treatment also improved respiratory distress, suggesting potential benefits for LTA management.

Area of Science:

  • Pediatric Critical Care Medicine
  • Respiratory Medicine
  • Emergency Medicine

Background:

  • Life-threatening asthma (LTA) presents a significant challenge in pediatric intensive care.
  • Refractory status asthmaticus often requires advanced interventions.
  • Acidosis is a critical concern in severe asthma exacerbations.

Purpose of the Study:

  • To evaluate the impact of sodium bicarbonate on carbon dioxide levels in pediatric patients with LTA.
  • To assess the clinical effectiveness of sodium bicarbonate in improving respiratory distress in LTA.

Main Methods:

  • Retrospective study conducted in a pediatric intensive care unit (PICU).
  • Seventeen children with LTA who received intravenous sodium bicarbonate were analyzed.
  • Sodium bicarbonate was administered to acidotic patients (pH < 7.15) with refractory status asthmaticus.

Main Results:

  • A statistically significant decrease in partial pressure of carbon dioxide (Pco2) was observed post-sodium bicarbonate infusion (p = 0.007).
  • Clinical improvement in respiratory distress was noted in the majority of patients.
  • Five patients required intubation and mechanical ventilation, with some receiving bicarbonate post-intubation.

Conclusions:

  • Intravenous sodium bicarbonate administration was associated with a significant reduction in Pco2 in children with LTA.
  • The treatment correlated with an improvement in respiratory distress.
  • Further controlled, prospective studies are warranted to confirm the benefits of sodium bicarbonate in LTA.
Abstract

Related Concept Videos

Diagnosing Acidosis and Alkalosis01:24

Diagnosing Acidosis and Alkalosis

Diagnosing acid-base imbalances involves systematically analyzing arterial blood samples, focusing on three key measurements: pH, bicarbonate (HCO3−) concentration, and carbon dioxide partial pressure (PCO2). This analysis follows a four-step process that helps identify the imbalance's underlying cause and nature.
First, the pH level is assessed to determine whether the blood pH is normal (7.35–7.45), low (acidosis), or high (alkalosis).
Next, the PCO2  and HCO3−  values are examined to...
Acute Respiratory Failure-III01:30

Acute Respiratory Failure-III

Hypercapnic respiratory failure, also known as Type 2 or ventilatory respiratory failure, is a severe condition characterized by the body's inability to effectively remove carbon dioxide (CO2) from the bloodstream. It leads to an arterial CO2 pressure (PaCO2) exceeding 45 mmHg and a blood pH above 7.35. This situation indicates that the body's ventilatory demand, or the ventilation needed to maintain normal PaCO2 levels, surpasses its supply or the maximum gas flow achievable without causing...
Respiratory Regulation of Acid-Base Balance01:18

Respiratory Regulation of Acid-Base Balance

Respiratory compensation is a vital physiological process that stabilizes blood plasma pH by regulating the partial pressure of carbon dioxide (PCO2), a key determinant of pH levels. Most carbon dioxide in the blood dissolves and converts into carbonic acid (H2CO3). It dissociates into hydrogen ions (H+) and bicarbonate ions (HCO3⁻). There is also an inverse relationship between PCO2​​ and pH.
When carbon dioxide levels increase in the blood, more H+ and HCO3⁻ are produced, leading to a...
Bicarbonate-Carbonic Acid Buffer01:22

Bicarbonate-Carbonic Acid Buffer

The carbonic acid-bicarbonate buffer system is critical for maintaining the body's pH balance. It operates on the equilibrium:
Disorders of Acid-Base Balance01:29

Disorders of Acid-Base Balance

The human body maintains a precise pH range of arterial blood between 7.35 and 7.45. Deviations result in either acidosis (pH < 7.35) or alkalosis (pH > 7.45). These conditions are further classified as respiratory or metabolic disorders based on their underlying cause.
Respiratory Acidosis and Alkalosis
Respiratory acidosis occurs due to an increase in the partial pressure of carbon dioxide PCO2 in the blood. It often arises from shallow breathing or impaired gas exchange caused by...
Breathing01:05

Breathing

The process of breathing, inhaling and exhaling, involves the coordinated movement of the chest wall, the lungs, and the muscles that move them. Two muscle groups with important roles in breathing are the diaphragm, located directly below the lungs, and the intercostal muscles, which lie between the ribs. When the diaphragm contracts, it moves downward, increasing the volume of the thoracic cavity and creating more room for the lungs to expand. When the intercostal muscles contract, the ribs...