Unrecognized severe anemia in children presenting with respiratory distress
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Updated: Oct 29, 2026

Protocol and Guidelines for Point-of-Care Lung Ultrasound in Diagnosing Neonatal Pulmonary Diseases Based on International Expert Consensus
Published on: March 6, 2019
1Department of Pediatric Emergency Medicine, Children's Hospitals and Clinics-St. Paul, MN, USA.
Insights
Severe anemia can cause respiratory distress in young children, mimicking asthma. Prompt diagnosis and blood transfusions are crucial for recovery in pediatric patients presenting with tachypnea and pallor.
Area of Science:
- Pediatrics
- Hematology
- Emergency Medicine
Background:
- Severe anemia is a potential cause of respiratory distress in children.
- Prompt recognition is vital for appropriate management and improved outcomes.
Observation:
- Four pediatric cases (11 months to 2 years) presented with tachypnea and respiratory distress unresponsive to bronchodilators.
- Patients exhibited pallor and significantly low hemoglobin levels (2.5-5.2 g/dL).
- Diagnoses included transient erythroblastopenia of childhood, acute lymphoblastic leukemia, and iron deficiency anemia.
Findings:
- Respiratory distress resolved in three children following blood transfusions.
- The clinical presentation mimicked common respiratory disorders, delaying definitive diagnosis.
Implications:
- Clinicians should consider severe anemia in pediatric patients with unexplained tachypnea, pallor, and respiratory distress.
- Early anemia screening can prevent delayed diagnosis and treatment of critical underlying conditions.
- This highlights the importance of a comprehensive differential diagnosis in pediatric respiratory emergencies.
Abstract:
The cases of four children who presented with respiratory distress unresponsive to bronchodilator treatment and who were subsequently diagnosed with severe anemia were retrospectively reviewed from charts at a children's hospital with 110 beds and an emergency department census of 32,000 per year. The four children, age range 11 months to 2 years, each initially presented with tachypnea. Three had wheezing, three were pale, and each received outpatient bronchodilator treatment. Three to 4 days later, each patient was hospitalized for continued respiratory distress. Each child was pale, and hemoglobin levels ranged from 2.5 to 5.2 g/dL. In three children, respiratory distress resolved with blood transfusions. Final diagnoses were transient erythroblastopenia of childhood in 2, acute lymphoblastic leukemia in 1, and iron deficiency anemia in 1. Severe anemia is a known cause of respiratory distress. These cases remind the clinician to consider severe anemia in children who are tachypneic, pale, and unresponsive to treatment of respiratory disorders.
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