Document Detail


Topical silver treatment after escharectomy of infected full thickness burn wounds in rats.
MedLine Citation:
PMID:  15920422     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
White male Sprague Dawley rats (200 g.) with 20% full thickness scald burns seeded with 10 Pseudomonas aeruginosa, strain 59-1244, were used as experimental animals. Studies including the following: (1). Control groups. (2). DC pretreatment groups. (3). Treatment groups. P. aeruginosa infected burn wounds were excised, and then treated with either autograft or silver-nylon dressings, with (SNDC) or without (SN) application direct current. Excision and treatment were initiated 1, 2, 3, 4 or 5 days after burning and inoculation. (4). Groups for antimicrobial barrier function study. Mortality of each group was recorded at 21 days PB. With burns alone, there was no mortality. Without treatment 19 of 20 burn inoculated controls died. In the pretreatment study, the mortality of the group pretreated with SN was 95% while that of the group pretreated with SNDC was only 30%. With excision and autografting, PB mortality rose from 5/20 at day 2 PB to 19/20 at day 3 PB. In the excision and SN groups, mortality rose from 5/20 at day 3 PB to 18/20 at day 4 PB. In the excision and SNDC groups, mortality rose from 5/20 at day 3 PB to 18/20 at day 4 PB. In the antimicrobial barrier function study, the 10% mortality in the SN dressing group was significantly less than that of 95% in the plain nylon dressed group. Histologic examination revealed progressively deepening colonization of non-viable wound tissue, progressing to invasion of underlying viable tissue by PB day 4. With wound excision, SN, SNDC, and autografting were equally protective for the first two days, but only SN and SNDC extended this effect to the third PB day. In conclusion, SN and SNDC have a strong local anti-microbial effect on the burn wound when applied within 72 hours of the time of bacterial inoculation, but little effect if applied after the bacteria have invaded unburned vessels and viable tissue adjacent to the burn.
Authors:
Chi-Sing Chu; Albert T McManus; Arthur D Mason; Basil A Pruitt
Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  The Journal of trauma     Volume:  58     ISSN:  0022-5282     ISO Abbreviation:  J Trauma     Publication Date:  2005 May 
Date Detail:
Created Date:  2005-05-27     Completed Date:  2005-06-28     Revised Date:  2009-11-03    
Medline Journal Info:
Nlm Unique ID:  0376373     Medline TA:  J Trauma     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1040-6     Citation Subset:  AIM; IM    
Affiliation:
US Army Institute of Surgical Research, 3400 Rawley E. Chambers Avenue, Fort Sam Houston, Texas 78234-6315, USA.
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MeSH Terms
Descriptor/Qualifier:
Abscess / pathology
Administration, Topical
Animals
Burns / drug therapy*,  pathology,  surgery*
Debridement
Disease Models, Animal
Male
Pseudomonas Infections / drug therapy*,  pathology
Rats
Rats, Sprague-Dawley
Silver / administration & dosage*
Survival Analysis
Treatment Outcome
Wound Infection / drug therapy*
Chemical
Reg. No./Substance:
7440-22-4/Silver

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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