[Vascular by-pass surgery infection incidence and risk factors at the Juan Canalejo Hospital in Corunna within the 2000-2002 period]. / Incidencia y factores de riesgo de las infecciones quirurgicas de by-pass vasculares en el Hospital Juan Canalejo de a Corunã en el período 2000-2002.

BACKGROUND: Vascular by-pass surgery is being used increasingly more frequently on elderly patients entailing several risk factors. Surgical infections in these procedures are a devastating complication which is related to high morbility and death rates. This study is aimed at ascertaining the incidence of surgical infections among patients having undergone a by-pass procedure with vascular prostheses, the risk factors associated thereto and the type or prosthesis entailing a lower infection rate. METHODS: A retrospective cohort study was conducted at the Vascular Surgery Unit of the Juan Canalejo University Hospital throughout the 2000-2002 period. The Disease Control Center infection criteria were those applied. The frequency measurements calculated were cumulative incidence and relative risk as an association measurement. The statistical tests employed were the Chi-square and the Chi-square trend tests, the Student's-T for univariate analysis and logic regression for the multi-variate analysis. RESULTS: The cumulative incidence rate for the 2000-2002 period was 22.6% to 12.1%. The most frequent microorganisms were Staphylococcus aureus, meticilin-resistant Staphylococcus aureus, Staphylococcus epidermidis, and Escherichia coli. The risk factors related to infection found were female sex (RR=1.8) anesthetic risk >2 (RR=1.7) and patient implanted with sapheneous vein vascular prosthesis (RR=3.8). CONCLUSIONS: The risk factors identified were the female sex, anesthetic risk and the type of prosthesis used, all of which condition infection-related complication in by-pass surgery.

Incidencia y factores de riesgo de las infecciones quirúrgicas de by-pass vasculares en el Hospital Juan Canalejo de A Coruña en el período 2000-2002 / Vascular By-pass Surgery Infection Incidence and Risk Factors at the Juan Canalejo Hospital in Corunna within the 2000-2002 Period

Fundamento: La cirugía vascular de by pass se utiliza cada vezcon mayor frecuencia en sujetos de edad avanzada y con varios factoresde riesgo. La infección quirúrgica de estas intervenciones esuna complicación devastadora que se asocia con unas altas tasas demorbilidad y mortalidad. Los objetivos del estudio son conocer laincidencia de infecciones quirúrgicas en pacientes sometidos a bypass con prótesis vasculares, los factores de riesgo asociados a ellasy el tipo de prótesis que presenta mayor tasa de infección.Métodos: Se llevó a cabo un estudio cohortes retrospectivo en elServicio de Cirugía Vascular del Hospital Universitario Juan Canalejo,realizado durante los años 2000-2002. Los criterios de infecciónaplicados fueron los del Center for Disease Control. Las medidas defrecuencia calculadas fueron incidencia acumulada y el riesgo relativocomo medida de asociación. Las pruebas estadísticas empleadasfueron el Chi cuadrado y el Chi cuadrado de tendencias, T de Studentpara análisis univariado y la regresión logística para el multivariado.Resultados: La tasa de incidencia acumulada entre los años2002-2002 fue de 22,6% a 12,1%. Los microorganismos más frecuentesfueron Staphilococcus aureus, Staphilococcus aureus meticilinaresistente, Staphilococcus epidermidis, y Escherichia coli Losfactores de riesgo relacionados con la infección encontrados fueronel sexo femenino (RR=1,8) riesgo anestésico>2 (RR= 1,7) y laimplantación de prótesis venosa de vena safena del paciente (RR=3,8).Conclusiones: Los factores de riesgo identificados han sido elsexo femenino, el riesgo anestésico y el tipo de prótesis utilizada.Todos ellos condicionan la complicación infecciosa en la cirugía deby-pass

Background: Vascular by-pass surgery is being used increasinglymore frequently on elderly patients entailing several risk factors.Surgical infections in these procedures are a devastating complicationwhich is related to high morbility and death rates. Thisstudy is aimed at ascertaining the incidence of surgical infectionsamong patients having undergone a by-pass procedure with vascularprostheses, the risk factors associated thereto and the type orprosthesis entailing a lower infection rate.Methods: A retrospective cohort study was conducted at theVascular Surgery Unit of the Juan Canalejo University Hospitalthroughout the 200-2002 period. The Disease Control Center infectioncriteria were those applied. The frequency measurements calculatedwere cumulative incidence and relative risk as an associationmeasurement. The statistical tests employed were the Chi-square andthe Chi-square trend tests, the Student's-T for univariate analysis andlogic regression for the multi-variate analysis.Results: The cumulative incidence rate for the 2000-2002 periodwas 22.6% to 12.%. The most frequent microorganisms wereStaphylococcus aureus, meticilin-resistant Staphylococcus aureus,Staphylococcus epidermidis, and Escherichia coli. The risk factorsrelated to infection found were female sex (RR=1.8) anesthetic risk>2 (RR= 1.7) and patient implanted with sapheneous vein vascularprosthesis (RR= 3.8).Conclusions: The risk factors identified were the female sex,anesthetic risk and the type of prosthesis used, all of which conditioninfection-related complication in by-pass surgery