clownfishsydney
Contributor
A bit more from Dr Carl Edmonds, only received by me today for a paper he has written for DAN Australia's newsletter.
Autopsy. The cause of death, according to the forensic Pathologist, Professor David Williams, was drowning. Extensive air embolism was also present, in both arterial and venous systems, and this was said to have occurred when there was still an active vascular circulation.
Post mortem CT scans also revealed sphenoidal and other sinus opacities, indicating descent whist unconscious but alive, and bilateral pneumothoraces.
This "drowning" diagnosis was modified to "Asphyxia" by both the Australian judiciary and police, presumably to support a conviction of death from cessation of an air supply (a forensic description of asphyxia). This was not accepted by Judge Nail in Atlanta, who correctly adhered to the pathologist's diagnosis of drowning. The lung weights and histology were characteristic of drowning, not simple asphyxia.
A more clinical diving medical assessment would be:
1. Aspiration, Hypoxia and then Drowning (not Asphyxia)
Supported by
· Lungs at autopsy
· Froth ++ on surfacing and during resuscitation
Predisposing causes
· Panic, personality factors
· Over-weighted
· Exertion and over breathing the regulator
· Inexperience in the diving environment (currents, depth)
· Salt water aspiration leading to hypoxia and drowning
2. Air Embolism from Pulmonary Barotrauma
Supported by autopsy and post-mortem CT scan findings of excessive gas
· bilateral pneumothoraces.
· Gas in arterial system
· Blood coming out of her mouth or nose
Predisposing factors
· rapid ascent
· positive pressure from the purge valve of the regulator.
The dive profile, the amount of gas and its distribution indicated that other explanations, such as putrefaction or post-mortem decompression artefact (off-gassing) were inadequate to explain the above findings, without pulmonary barotrauma and air embolism.
Hope this helps explain it more, especially for Tina's family. Note that 60 Minutes Australia is doing a story on this on Sunday night (I think). They interviewed Carl today, not sure if they will approach me as they have been recommended to do.
Autopsy. The cause of death, according to the forensic Pathologist, Professor David Williams, was drowning. Extensive air embolism was also present, in both arterial and venous systems, and this was said to have occurred when there was still an active vascular circulation.
Post mortem CT scans also revealed sphenoidal and other sinus opacities, indicating descent whist unconscious but alive, and bilateral pneumothoraces.
This "drowning" diagnosis was modified to "Asphyxia" by both the Australian judiciary and police, presumably to support a conviction of death from cessation of an air supply (a forensic description of asphyxia). This was not accepted by Judge Nail in Atlanta, who correctly adhered to the pathologist's diagnosis of drowning. The lung weights and histology were characteristic of drowning, not simple asphyxia.
A more clinical diving medical assessment would be:
1. Aspiration, Hypoxia and then Drowning (not Asphyxia)
Supported by
· Lungs at autopsy
· Froth ++ on surfacing and during resuscitation
Predisposing causes
· Panic, personality factors
· Over-weighted
· Exertion and over breathing the regulator
· Inexperience in the diving environment (currents, depth)
· Salt water aspiration leading to hypoxia and drowning
2. Air Embolism from Pulmonary Barotrauma
Supported by autopsy and post-mortem CT scan findings of excessive gas
· bilateral pneumothoraces.
· Gas in arterial system
· Blood coming out of her mouth or nose
Predisposing factors
· rapid ascent
· positive pressure from the purge valve of the regulator.
The dive profile, the amount of gas and its distribution indicated that other explanations, such as putrefaction or post-mortem decompression artefact (off-gassing) were inadequate to explain the above findings, without pulmonary barotrauma and air embolism.
Hope this helps explain it more, especially for Tina's family. Note that 60 Minutes Australia is doing a story on this on Sunday night (I think). They interviewed Carl today, not sure if they will approach me as they have been recommended to do.
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