June 2, 2014 -- Summer is a time for water fun, but also for a higher risk of drowning.
Many people don't realize that people can drown even after they're out of the water. It's a rare phenomenon known as "dry drowning" or "secondary drowning."
To learn more, WebMD spoke with James Orlowski, MD, from Florida Hospital Tampa, whose research on drowning has earned global recognition.
Here's what you need to know about dry drowning and secondary drowning:
What is dry drowning? What is secondary drowning?
While "dry drowning" and "secondary drowning" are not official terms, dry drowning happens when someone breathes in small amounts of water during a struggle, Orlowski says. That triggers the muscles in their airway to spasm and makes breathing difficult.
A person who had a drowning close call can be out of the water and walking around normally before signs of dry drowning become apparent. But all dry drowning results in breathing trouble and brain injury, just as drowning in the water does. If untreated, it can be fatal.
Is dry drowning rare?
Dry drowning and secondary drowning are not common. Both probably amount to only 1%-2% of drownings, Orlowski says.
What are the signs of dry or secondary drowning?
A person who has inhaled water can have:
These signs are not easy to spot, particularly in young children who may normally be fussy or tired after a long day in the sun and water. If your child struggles or has problems while in the water, look for these signs, which can appear hours later.
What should you do if you think someone is at risk?
If you notice any of the signs above, go to to the emergency room immediately. Time is an important factor in treating dry drowning.
Can dry or secondary drowning be treated?
Yes, they can be treated with oxygen or ventilation at the hospital.
How long after an incident is there a risk for dry drowning?
Dry drowning and secondary drowning usually happen between 1 hour and 24 hours after a struggle in the water.
Can dry drowning and secondary drowning be prevented?
Orlowski stresses that there is no substitute for good parental supervision whenever children are around water, be it a swimming pool or a natural body of water. Drowning remains a serious problem, especially for children. Prevention includes knowing CPR, teaching young children to be water-safe or to swim, and putting a fence completely around a swimming pool to prevent young children from falling in accidentally.
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