Dry Drowning
Definition
Drowning in which laryngospasm seals the glottis, preventing water entry into the lungs. The victim asphyxiates without pulmonary aspiration. Autopsy shows non-specific asphyxial findings; the diatom test is expected to be negative.
- Mechanism
- Laryngospasm seals the glottis
- Effect
- Asphyxiation without pulmonary water aspiration
- Autopsy finding
- Non-specific asphyxial signs
- Diatom test
- Expected negative
Common questions
Why is a diagnosis of dry drowning particularly hard to confirm at autopsy?+
Because water never enters the lungs, the classic drowning findings such as pulmonary oedema, froth, or a positive diatom test are absent, leaving only non-specific asphyxial signs shared with several other causes of death, so dry drowning is often a diagnosis of exclusion based on circumstances and scene evidence rather than a direct autopsy finding.
How common is dry drowning compared to typical wet drowning cases?+
It is considered a minority mechanism among drowning deaths in the forensic literature. Most drowning deaths involve at least some pulmonary water aspiration, which is why a negative diatom test alone does not rule out drowning as the manner of death.
Related terms
- Diatom Test
- A laboratory test for ante-mortem submersion in which bone marrow (from sealed femur diaphysis) is acid-digested and the diatom species identified in...
- Frustule
- The silica cell wall of a diatom, composed of two overlapping valves (epitheca and hypotheca). Frustules are taxonomically distinctive, chemically resistant to...
- Pollard 1998 Protocol
- The standardised diatom test protocol published in Forensic Science International by A.M. Pollard (1998), specifying acid digestion conditions, wash steps, microscopy method,...
- Secondary Drowning
- Death from delayed non-cardiogenic pulmonary oedema occurring hours to days after an immersion and aspiration event, even if the victim was apparently...
- Vitreous Sodium
- The sodium concentration in the vitreous humour of the eye; reduced below normal in freshwater drowning (systemic haemodilution) and elevated in saltwater...
- Washerwoman Hands
- White, wrinkled, macerated skin on the hands and feet from prolonged water immersion. Indicates duration of immersion, not ante-mortem versus post-mortem submersion.
- Wet Drowning
- Drowning in which water is aspirated into the airways and lungs during the immersion event. Produces over-distended pale lungs, frothy exudate, and...