Abstract:
OBJECTIVE:This report, the second in a series of five, directly compares the efficacy of Reactive Skin Decontamination Lotion (RSDL), the M291 Skin Decontamination Kit (SDK), 0.5% bleach (sodium or calcium hypochlorite solution), 1% soapy water, and Skin Exposure Reduction Paste Against Chemical Warfare Agents (SERPACWA) in the haired guinea pig model following exposure to soman (GD). METHODS:In all experiments, guinea pigs were close-clipped and given anesthesia. In the decontamination experiments, the animals were challenged with GD and decontaminated after a 2-minute delay for the standard procedure or at longer times for the delayed-decontamination experiments. Positive control animals were challenged with GD in the same manner as the treated animals, except that they received no treatment. All animals were observed during the first 4 hours and again at 24 hours after exposure for signs of toxicity and death. The protective ratio (PR, defined as the median lethal dose [LD(50)] of the treatment group divided by the LD(50) of the untreated positive control animals) was calculated from the derived probit dose-response curves established for each treatment group and nontreated control animals. SERPACWA was applied as a thin coating (0.1 mm thick), allowed to dry for 15 minutes, and challenged with GD. After a 2-hour challenge, any remaining GD was blotted off the animal, but no additional decontamination was done. Significance in this report is defined as p <.05. Neat (undiluted) GD was used to challenge all animals in these studies. RESULTS:In the standard 2-minute GD decontamination experiments, the calculated PRs for RSDL, 0.5% bleach, 1% soapy water, and M291 SDK were 14, 2.7, 2.2, and 2.6, respectively. RSDL was by far the most effective decontamination product tested and significantly better than any of the other products. Bleach, soapy water, and the M291 SDK provided equivalent and modest protection. Since only RSDL provided at least good protection (PR > 5), it was the only decontamination product evaluated for delayed decontamination. In the GD delayed-decontamination experiments, the calculated LT(50) (the delayed-decontamination time at which 50% of the animals die in the test population following a 5-LD(50) challenge) value for RSDL was only 4.0 minutes. CONCLUSIONS:Several conclusions can be drawn from this study: 1) Reactive Skin Decontamination Lotion provided superior protection against GD compared with the other products tested; 2) The 0.5% bleach solution, the 1% soapy water solution, and the M291 SDK were less effective than RSDL, but still provided modest (2 < PR < 5) protection against GD; 3) Reactive Skin Decontamination Lotion, the best product tested, did not provide significant protection against GD when decontamination was delayed for more than 3 minutes; 4) Skin Exposure Reduction Paste Against Chemical Warfare Agents provided significant, but modest, protection against GD; 5) There was good correlation between using the rabbit model and the guinea pig model for decontamination efficacy evaluations; and 6) Soman (GD) is an agent of real concern because it is very difficult to decontaminate and the effects of exposure are difficult to treat.
journal_name
Cutan Ocul Toxicoljournal_title
Cutaneous and ocular toxicologyauthors
Braue EH Jr,Smith KH,Doxzon BF,Lumpkin HL,Clarkson EDdoi
10.3109/15569527.2010.515281subject
Has Abstractpub_date
2011-03-01 00:00:00pages
29-37issue
1eissn
1556-9527issn
1556-9535journal_volume
30pub_type
杂志文章abstract:PURPOSE:Hazelnut and birch pollen are known to destroy tear film components and attack ocular surface cells. We investigated further pollen species from different plant families, whether they show similar effects on human tear fluid and an epithelial cell line in vitro, to provide a broad basis for further research on ...
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journal_title:Cutaneous and ocular toxicology
pub_type: 临床试验,杂志文章
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journal_title:Cutaneous and ocular toxicology
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更新日期:2012-03-01 00:00:00
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journal_title:Cutaneous and ocular toxicology
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doi:10.3109/15569521003631752
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journal_title:Cutaneous and ocular toxicology
pub_type: 杂志文章
doi:10.3109/15569527.2010.534748
更新日期:2011-06-01 00:00:00
abstract:BACKGROUND:Systemic isotretinoin (13-cis-retinoic acid) is effective in the treatment of acne vulgaris. The most common side effects are mucocutaneous ones. Hematuria seen secondary to isotretinoin treatment is thought to be due to mucosal dryness in the urinary system. This study aims to determine the frequency of hem...
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doi:10.3109/15569527.2016.1155595
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pub_type: 杂志文章,评审
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pub_type: 临床试验,杂志文章
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doi:10.3109/15569527.2011.629384
更新日期:2012-09-01 00:00:00
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更新日期:2005-01-01 00:00:00
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