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Previous issue date: 2000 / Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) / O objetivo deste estudo foi avaliar os niveis sericos pre (PRE) e pos administracao (POS) da vancomicina e a associacao destes niveis com a idade gestacional, idade pos-natal, idade pos-conceptual, dose e intervalo d antibiotico em recem-nascidos, cuja indicacao seguiu o esquema rotineiro preconizado em terapia intensiva neonatal. A casuistica constituiu-se de 27 casos que receberam vancomicina no periodo de maio/l998 a marco/l999, segundo o esquema de YOUNG & MANGUM (l997): 16 (59 por cento) por sepse ou outra infeccao e 11 (41 por cento) por indicacao profilatica. A idade gestacional foi 34,0 + 4,7 semanas, a idade pos-natal 22 + 28 dias e a idade pos-conceptual 37,2 + 4,0 semanas. Os niveis sericos foram avaliados entre 36 e 72 horas do inicio do antibiotico e dosados por imunofluorescencia polarizada (TDx/FLx©). A faixa terapeutica foi considerada de 5 a 10 mcg/mL para o nivel PRE e de 20 a 40 mcg/mL para o nivel POS. Concentracoes PRE e POS terapeuticas foram encontradas em 22 por cento e 74 por cento da amostra, respectivamente. A idade gestacional superior a 34 semanas associou-se a niveis PRE toxicos e inferior ou igual a 34 semanas a niveis PRE subterapeuticos (FISHER; p=O,Ol5). Concentracoes toxicas PRE tenderam a associar-se a idade pos-natal igual ou abaixo de 10 dias e a idade pos-conceptual acima de 34 semanas. Niveis subterapeuticos PRE tenderam a associacao com idade pos-natal maior que 10 dias e idade pos-conceptual igual ou inferior a 34 semanas. Idade gestacional, idade pos-natal, idade pos-conceptual, dose e o intervalo de administracao de vancomicina nao se associaram a niveis POS terapeuticas, toxicos ou subterapeuticos. A analise de regressao linear mostrou que a idade gestacional foi a variavel que mais influenciou o nivel serico PRE (R2=02270; p=O,Ol2) e a idade pos-natal a que mais influenciou o nivel POS (R2=0,1894; p=O,O23). Conclui-se que a idade gestacional e a idade pos-natal devem ser consideradas para determinar o intervalo entre as doses de vancomicina ministradas. A idade pos-natal pode auxiliar na escolha da dose diaria de vancomicina administrada em recem-nascidos / This study aims to evaluate vancomycin trough and peak concentrations and the association between these levels with gestational age, postnatal age, post-conceptual age, antibiotic dosage and interval in neonates that received vancomycin according to neonatal intensive care routine. Twenty seven patients received vancomycin from May/1998 to March/1999 according to YOUNG & MANGUM (1997) due to sepsis or other infection (n=16; 59%) and due to prophylactic use (n=11; 41%). Gestational age was 34,0 + 4,7 weeks, postnatal age was 22 + 28 days and postconceptional age was 37,2 + 4,0 weeks. Serum concentrations were determined between 36
and 72 hours after initiation of vancomycin administration and the levels were measured by fluorescence polarization immunoassay on TDx/FLx analyzer. Therapeutic ranges were considered when troughs were 5-10 mcg/mL and peaks 20-40 mcg/mL. Therapeutic trough and peak concentrations were detected in 22% and
74% neonates, respectively. Gestational age higher than 34 weeks was associated with toxic trough levels and gestational age lower than 34 weeks was associated with sub-therapeutic trough levels (FISHER; p=0.015). Toxic
trough concentrations showed a trend to be associated with postnatal age equal to or lower than 10 days and postconceptional age greater than 34 weeks. Subtherapeutic trough levels had a trend to be associated with postnatal age beyond 10 days and postconceptional age equal or lower than 34 weeks. Gestational age, postnatal age, postconceptional age, antibiotic dosage and interval between dosages were not associated with therapeutic, toxic, or subtherapeutic peak levels.Linear regression analysis showed that the gestational age was the
variable that most influenced trough concentrations of vancomycin (R2=0,2270; p=0,012). Postnatal age was the factor that most influenced the peak levels (R2=0,1894; p=0,023). Gestational age and postnatal age should be considered to determine the interval between dosages of vancomycin. Postnatal age may help to choose
the daily dosage of this antibiotic in newborn infants. / BV UNIFESP: Teses e dissertações
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.unifesp.br:11600/16734 |
| Date | January 2000 |
| Creators | Borrozzino, Renata [UNIFESP] |
| Contributors | Almeida, Maria Fernanda Branco de [UNIFESP] |
| Publisher | Universidade Federal de São Paulo (UNIFESP) |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | 133 f. |
| Source | reponame:Repositório Institucional da UNIFESP, instname:Universidade Federal de São Paulo, instacron:UNIFESP |
| Rights | info:eu-repo/semantics/openAccess |
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