This PedsCases Note provides a one-page infographic on Meconium Aspiration Syndrome. Meconium aspiration syndrome (MAS) occurs when the baby breathes in, or aspirates, meconium-stained amniotic fluid. It was created by Sahaj Puri with the help of Dr. Kevan Mehta.

Click on the image below for the full-screen PDF handout.

References

1. Davis D, Barrington K, Canadian Paediatric Society, Fetus and Newborn Committee. Recommendations for neonatal surfactant therapy. Paediatrics & Child Health. 2005 Feb 1;10(2):109–16. 

2. Dini G, Ceccarelli S, Celi F, Semeraro CM, Gorello P, Verrotti A. Meconium aspiration syndrome: from pathophysiology to treatment. Annals of Medicine and Surgery. 2024 Apr;86(4):2023. 

3. Merck Manual Consumer Version [Internet]. [cited 2025 Mar 20]. Meconium Aspiration Syndrome - Children’s Health Issues. Available from: https://www.merckmanuals.com/en-ca/home/children-s-health-issues/lung-an...

4. Merck Manual Consumer Version [Internet]. [cited 2025 Mar 20]. Persistent Pulmonary Hypertension of the Newborn - Children’s Health Issues. Available from: https://www.merckmanuals.com/en-ca/home/children-s-health-issues/lung-an...

5. Sayad E, Silva-Carmona M. Meconium Aspiration. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 [cited 2025 Mar 20]. Available from: http://www.ncbi.nlm.nih.gov/books/NBK557425/

6. Hermansen CL, Mahajan A. Newborn Respiratory Distress. American Family Physician. 2015 Dec 1;92(11):994–1002.

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