Deep Dive: An Interview with Dr Laura Trapani

Episode Notes

Dr Laura Trapani

The Safety Risks of Full-Face Snorkeling Masks, particularly for Children

This interview is based on research presented by Dr. Laura Trapani a pediatrician and clinical researcher affiliated with the IRCCS Burlo Garofolo children’s Hospital and the University of Trieste in Italy. Where her work is helping to reshape how we think about child safety in the water. Full-Face Snorkeling Masks Carry a Risk of Hypercapnia and Drowning in Younger Children: A Case Series 2025.

Dr. Trapani’s research has gotten the attention of the Italian Ministry who are in the process of developing questions to submit to full face mask manufacturers. She also noted that many physicians across Italy have contacted her to provide data and work on this issue. She said it would be great if countries would support this effort with her.

The discussion emphasized physiology, real-world case studies, and the need for improved safety standards and public awareness. Key Findings:

1. Primary Risk: Hypercapnia & Hypoxia Full-face snorkel masks can cause carbon dioxide (CO₂) buildup and reduced oxygen levels.

Risk is determined by weight and lung capacity, not age • Children have limited breathing capacity (~7–10 ml/kg) • Example: o 20 kg child → ~200 ml air capacity o Mask volume → ~250 ml or more • Result: Rebreathing CO₂, leading to potential unconsciousness .

2. Mechanical & Design Risks • Masks are complex respiratory devices, not toys • Multiple valves and chambers can malfunction • Dead air space can increase up to 1.5 liters if compromised • External factors (saltwater, sand, heat) can degrade performance.

3. Silent Drowning • Victims may not show distress signals • Gradual slowing, confusion, then unconsciousness • Applies to both children and adults.

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