CNS O2 Toxicity (Again)

[Guest guest]

I've been doing some searching and all I could come up with is this

extracted from the US Navy Diving manual;

Oxygen Toxicity

Oxygen toxicity may develop during treatment, particularly when the oxygen

treatment tables are used. Toxicity may take two forms: 1) central nervous

system toxicity and 2) pulmonary toxicity. Warning signs of CNS oxygen

toxicity include tunnel vision; abnormal ringing or roaring sounds in the

ears; nausea; muscle twitching, usually in the lips or face; dizziness; and

change in behavior, including confusion, though these cannot be relied on;

CNS toxicity frequently ocurrs without warning. If oxygen breathing is

continued, a generalized seizure will occur. For the resting chamber

patient, CNS oxygen toxicity is unlikely at depths of 50 fsw (15 msw while

breathing pure. PO2 =2.5 atm) or shallower, and extremely unlikely at depths

of 30 fsw (9 msw) and shallower. If signs of CNS toxicity develop, oxygen

breathing is stopped, and the patient is allowed to breath chamber air.

Oxygen administration can be restarted 15 minutes after all symptoms have

resided.

I ve also found the following links which mention it but there are no

specifics of treatment. Most of the literature avaialble seems to

concentrate on working out dive times and prevention of 02 toxicity rather

than the specific treatments.

Hope this helps

Ian

http://www.vnh.org/FSManual/01/10OxygenToxic.html (Scroll down the page)

http://www.chez.com/xgonin/OHB/diaginfOHB.htm

__________________________________________

Ian Sharpe

International SOS Paramedic

AGIP Kco Marine Supply Base

Bautino, Republic of Kazakhstan

Tel: +31 70 313 3655 / 3690 (Clinic/ Accommodation)

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