Evaluation of Full Face Snorkel Masks (FFSMs)

Completed · Not applicable

Conditions studied: Snorkeling, Face Mask Squeeze, Underwater Physiology, Swimming Physiology

In brief

Recently, multiple models of Full Face Snorkel Mask (FFSM) have entered the retail market. However, several fatalities have been reported to the non-profit agency Divers Alert Network (DAN) for snorkelers who were using FFSMs, and most of these fatality reports have unclear or unreported causes of death. This project is to determine the characteristics of the FFSMs when they are in use by snorkelers. Volunteers will be asked to snorkel in a water tank while breathing through several models of commercially available FFSM, one at at time.

Key facts

Study ID

NCT04783688

Run by

Duke University

People needed

10

Starts

2021-03-09

Expected to finish

2021-06-11

Last updated by the study team

2021-07-14

Who can join

Age: any. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• Preferred >35 years old
• Safe to perform light activity

You may not qualify if…

• Subjects must NOT be certified SCUBA divers
• GROUP B:
• Inclusion Criteria:
• Age 18-40
• VO2max exercise test results >30 mL/kg/min for female, >35 mL/kg/min for male
• Exclusion Criteria:
• Subjects must NOT be certified SCUBA divers
• May not be active smokers

Where it is running

• Duke University Center for Hyperbaric Medicine & Environmental Physiology — Durham, North Carolina, United States

Full record on ClinicalTrials.gov

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