Document Detail


Natural-biomembrane dressing and hypersensitivity.
MedLine Citation:
PMID:  22147027     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
BACKGROUND: The natural biomembrane of latex extracted from Hevea brasiliensis has been used as a dressing for skin ulcers. OBJECTIVES: To evaluate how safe the natural biomembrane is in relation to hypersensitivity to latex when used as a dressing. METHODS: We selected patients with skin ulcers, forming the following groups: control - low occupational exposure to latex (n = 17); latex-exposed control - high occupational exposure (n = 14); ulcerated, using the natural biomembrane (n = 13); ulcerated control, not using the natural biomembrane (n = 14); and new cases (n = 9), assessed before and after 3 months of using the natural biomembrane. All patients underwent clinical and epidemiological evaluation for latex hypersensitivity and specific IgE (UniCap®), and the control and latex-exposed control groups underwent the patch test. RESULTS: Hypersensitivity was positive in 64.7% of the patients in the control group, 71.4% of the patients in the latex-exposed control group, 61.5% of the ulcerated using the natural biomembrane, 35.7% of the ulcerated control, and only 22 , 2% of the new cases. In the patch test of the control and latex-exposed control groups, only one individual in the control group (low contact) showed erythema in the first reading, which became negative in the second. The mean contact with latex in the latex-exposed control group was 3.42 hours / day. In the fluoroimmunoenzymatic assay, most of the sera was classified as zero (range 0-6). No serum was rated above 2, which is not considered significant for hypersensitivity (classification > 4). CONCLUSION: The natural biomembrane proved to be safe as a dressing, for it did not induce hypersensitivity reactions among the volunteers who underwent the patch test or among users of the natural biomembrane, as it was clinically and immunologically demonstrated by IgE levels.
Authors:
Marco Andrey Cipriani Frade; Joaquim Coutinho Netto; Fernanda Guzzo Gomes; Eduardo Lopez Mazzucato; Thiago Antônio Moretti de Andrade; Norma Tiraboschi Foss
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Publication Detail:
Type:  JOURNAL ARTICLE    
Journal Detail:
Title:  Anais brasileiros de dermatologia     Volume:  86     ISSN:  1806-4841     ISO Abbreviation:  -     Publication Date:  2011 Oct 
Date Detail:
Created Date:  2011-12-7     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0067662     Medline TA:  An Bras Dermatol     Country:  -    
Other Details:
Languages:  ENG; POR     Pagination:  885-891     Citation Subset:  -    
Affiliation:
Divisão de Dermatologia, Departamento de Clínica Médica, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, São Paulo, SP, Brasil.
Vernacular Title:
Curativo de biomembrana vegetal e hipersensibilidade.
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