There are a number of causes of drowning leading to disruption of the respiratory system and preventing the distribution of oxygen around the body, resulting in hypoxia and cardiac arrest.
Contrary to historical definitions and popular belief, drowning is a process that does not always result in death, as it can be interrupted, and cases of drowning can vary in severity. Cases where the victim is rescued and the drowning process is interrupted are referred to as nonfatal drowning, while terminal cases are termed fatal drowning.
Typically, the causes of drowning include:
Laryngospasm occurs in less than two percent of drowning cases and is incorrectly thought to protect the airways.
Drowning is a largely preventable cause of death and is one of the most common causes of death in children. Those who have been rescued from drowning present few symptoms thereafter and usually fully recover within four to eight hours of the incident.
Dry drowning, sometimes called secondary drowning, is not a medically accepted diagnosis and is a controversial term in the medical field, as the symptoms of drowning and dry drowning are the same. Therefore, no clinical distinction can be made between the two. Historically, the term ‘dry drowning’ was used to describe cases in which the deceased found in the water had no water in the lungs at autopsy.
There is a lot of misinformation spread by mainstream media outlets about alleged cases of dry drowning, with most cases having alternative, medically recognized sources.
Many health organisations, disease control and prevention centers, care providers and aquatics institutes strongly discourage the use of modifiers to categorize drowning cases.
The following terms are not to be used to describe or categorize drowning:
Secondary drowning, like dry drowning, is not a medically accepted term. In the past it was used to describe patients whose symptoms worsened due to pulmonary edema from aspirating small amounts of water. Again, it is not an accepted term due to the presence of alternative clinical causes of drowning.
After an incident in water, it’s advised to stay vigilant for the next 24 hours. Since patients may not present symptoms of drowning immediately afterwards, it is advised that they seek immediate medical attention if any of the following symptoms are present at a later stage:
Patients are advised to seek medical attention even they feel normal after leaving the water, but begin to show symptoms more than eight hours after the incident. Other diagnoses at this point should be considered, such as:
All of these have been mistakenly termed as delayed, dry or secondary drowning.
A global report by the World Health Organisation stated that drowning claims the lives of 372,000 people worldwide every year. It is also a leading cause of death in children between the ages of 1 and 14.
Prevention is the best measure in avoiding all nonfatal and fatal cases of drowning. If prevention methods should fail and the drowning process begins, the most important course of action is to reverse cerebral hypoxia by providing oxygen to the brain.
Dry drowning is not a medically accepted term for diagnosing drowning. In reality, drowning is a process with varying severity, and is not synonymous with death as commonly believed and reinforced by the media.
Cases of fatal drowning are caused by a number of complications stemming from aspiration of water including hypoxemia, apnea, and cardiac arrest.
Prevention is the most important course of action in all cases of nonfatal and fatal drowning, with methods including supervision, swimming lessons, provision of floatation equipment, as well as consistent and accurate use and distribution of terminology relating to water safety and drowning.