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Introducción: Acinetobacter baumannii se asocia a una alta morbimortalidad, una mayor estancia hospitalaria y, por lo tanto, un gran impacto sanitario. Objetivos: comparar la respuesta clínica y la supervivencia empleando como tratamiento antibiótico colistina endovenosa frente a colistina combinada con altas dosis de ampicilina/sulbactam ante infecciones por A. baumannii multirresistente en las salas de cuidados intensivos de adultos del Hospital Nacional (Itauguá, Paraguay) Materiales y métodos: se aplicó un diseño de cohortes retrospectivas donde se analizó la respuesta clínica y laboratorial, la supervivencia a los 14 días y la tasa de mortalidad en pacientes tratados con colistina 5 mg/kg/día como monoterapia frente a terapia combinada de colistina 5 mg/kg/día más ampicilina/sulbactam 9 gramos cuatro veces al día. Las variables se obtuvieron de los expedientes clínicos de pacientes ≥18 años infectados con A. baumannii multirresistente. Resultados: se incluyeron 163 pacientes, con edad media de 50 ± 17 años, siendo el 61,96% de sexo masculino. El 69,33% presentó neumonía asociada a ventilación mecánica, el 21,47% bacteriemia, el 5,52% ventriculitis y el 3,68% infección relacionada a vía venosa central. Una cohorte de 88 pacientes recibió monoterapia con colistina endovenosa y otra de 75 pacientes la terapia combinada de colistina endovenosa más dosis altas de ampicilina/sulbactam. No se encontró diferencias en la puntuación de APACHE II entre ambas cohortes. La cohorte con tratamiento combinado demostró superioridad estadísticamente significativa al presentar mejoría clínica y laboratorial a las 72 hs, menor necesidad de vasopresores, mejor sobrevida a los 14 días y menor nefrotoxicidad. La tasa de mortalidad global fue del 45,40%. Conclusión: la terapia combinada de colistina endovenosa con dosis altas de ampicilina/sulbactam en infusión prolongada se encontró relacionada a mejoría clínica temprana, menor tiempo de requerimiento de vasopresores y asistencia respiratoria mecánica, mayor supervivencia a los 14 días y menor nefrotoxicidad.

Introduction: Acinetobacter baumannii is associated with high morbidity and mortality, longer hospital stays, and, therefore, a great health impact. Objectives: To compare the clinical response and survival using intravenous colistin as antibiotic treatment versus colistin combined with high doses of ampicillin/sulbactam in multidrug-resistant A. baumannii infections in the adult intensive care units of the National Hospital (Itauguá, Paraguay). Materials and methods: A retrospective cohort design was applied to analyze the clinical and laboratory response, 14-day survival, and mortality rate in patients treated with colistin five mg/kg/day as monotherapy versus combined colistin therapy five mg/kg/day plus ampicillin/sulbactam 9 grams four times a day. The variables were obtained from the clinical records of patients ≥18 years old infected with multidrug-resistant A. baumannii. Results: One hundred sixty-three patients were included, with a mean age of 50 ± 17 years, 61.96% male. Pneumonia associated with mechanical ventilation was present in 69.33%, bacteremia in 21.47%, ventriculitis in 5.52% and infections related to the central venous line in 3.68%. A cohort of 88 patients received monotherapy with intravenous colistin and another of 75 patients received combined therapy with intravenous colistin plus high doses of ampicillin/sulbactam. No differences were found in the APACHE II score between both cohorts. The cohort with combined treatment demonstrated statistically significant superiority by presenting clinical and laboratory improvement at 72 hours, less need for vasopressors, better survival at 14 days, and less nephrotoxicity. The overall mortality rate was 45.40%. Conclusion: The combined therapy of intravenous colistin with high doses of ampicillin/sulbactam in prolonged infusion was related to early clinical improvement, shorter time requiring vasopressors and mechanical ventilation, greater survival at 14 days, and less nephrotoxicity.

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INTRODUCCIÓN. La apendicitis aguda es una patología pediátrica quirúrgica que en su fase complicada requiere uso de antibióticos en el postoperatorio; encontrar la mejor opción como experiencia local, fue necesario. OBJETIVO. Comparar un esquema de antibioticoterapia triple vs un doble respecto a variables: demográficas, clínicas y de costos en pacientes pediátricos con apendicitis complicada. MATERIALES y MÉTODOS. Estudio analítico transversal. Población de 133 pacientes y una muestra de 93, operados por apendicitis complicada; 58 recibieron ampicilina + metronidazol + gentamicina y 35 ceftriaxona + metronidazol. Se comparó las variables: estadía hospitalaria, complicaciones y costo monetario de cada esquema. Se realizó en la Unidad de Cirugía Pediátrica del Hospital de Especialidades Carlos Andrade Marín, en el periodo enero de 2017 a octubre de 2018. Los datos fueron analizados con R-Studio 1.8.366 para Windows. RESULTADOS. No hubo diferencia estadística con respecto a: estadía hospitalaria (p=0,261); complicaciones como infección del sitio quirúrgico (p=0,196), re-intervención quirúrgica (p=0,653) y costo (p=0,059). CONCLUSIÓN. Se comparó el esquema de antibioticoterapia triple vs un doble, utilizados en apendicitis complicada en pediatría. No se encontró diferencias estadísticamente significativas en este reporte preliminar, con la diferencia de que con el esquema doble la frecuencia de administración fue menor y se evitó la exposición a los efectos colaterales de los aminoglicósidos.

INTRODUCTION. Acute appendicitis is a pediatric surgical pathology that in its complicated phase requires the use of antibiotics during the postoperative period; finding the best option as local experience was a must. OBJECTIVE. Compare a triple vs a double antibiotic therapy scheme respect demographic, clinical and cost variables in pediatric patients whit complicated apendicitis. MATERIALS AND METHODS. Cross-sectional analytical study. Population of 133 patients and sample of 93, with complicated appendicitis; 58 received ampicillin + metronidazole + gentamicin and 35 ceftriaxone + metronidazole. The following variables were compared; hospital stay, complications and monetary cost of each scheme. It was performed in the Pediatric Surgery Unit of the Hospital of Specialties Carlos Andrade Marin, during january 2017, through october 2018. The data were analyzed with R-Studio 1.8.366 for Windows. RESULTS. There was no statistical difference regarding hospital stay (p=0.261); complications such as surgical site infection (p=0.196), re-surgical intervention (p=0.653); nor cost (p=0.059). CONCLUSION. Triple vs. Double antibiotic therapy scheme used in complicated appendicitis in pediatrics was compared. No statistically significant differences were found in this preliminary report, how ever with the double scheme the frequency of administration was lower and exposure to side effects of aminoglycosides was avoided.

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RESUMEN La neurolisteriosis se presenta principalmente como meningitis o meningoencefalitis, en menor frecuencia romboencefalitis o absceso cerebral. Es la principal causa de muerte entre todas las meningitis bacterianas y se asocia con una alta tasa de discapacidad neurológica. Para su diagnóstico se deben tener en cuenta la edad y los factores de riesgo, principalmente individuos mayores de 50 años y con condiciones de inmunosupresión. Las ayudas diagnósticas son clave para lograr el aislamiento de Lm, donde el cultivo de LCR tiene la mejor sensibilidad. Aunque faltan estudios que demuestren la superioridad de los estudios moleculares, el FilmArray-MEP parece ser prometedor en el aislamiento rápido y preciso de los principales microorganismos involucrados en la meningitis piógena, entre estos Lm. La IRM cerebral es el estudio de elección para el diagnóstico de romboencefalitis. La piedra angular del tratamiento sigue siendo ampicilina, cuya asociación con aminoglucósido podría disminuir la mortalidad.

SUMMARY Neurolisteriosis presents mainly as meningitis or meningoencephalitis, to a lesser extent rhombencephalitis or brain abscess frequency. It is the leading cause of death among all Bacterial meningitis and is associated with a high rate of neurological disability. For your diagnosis must take into account age and risk factors, mainly over 50 years and with immunosuppression conditions. Diagnostic aids are key to achieving the isolation of Lm, where CSF culture has the best sensitivity. Although studies are lacking demonstrating the superiority of molecular studies, the Film Array-MEP appears to be promising in fast and accurate isolation of the main microorganisms involved in pyogenic meningitis, among these Lm. Brain MRI is the study of choice for the diagnosis of rhombencephalitis. The cornerstone of treatment remains ampicillin, and its association with aminoglycoside could decrease mortality.

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Abstract | Introduction: Shigellosis is endemic in low-and middle-income countries, causing approximately 125 million episodes of diarrhea and leading to approximately 160.000 deaths annually one-third of which is associated with children. Objective: To describe the characteristics and antimicrobial resistance profiles of Shigella species recovered in Colombia from 1997 to 2018. Materials and methods: We received isolates from laboratories in 29 Colombian departments. We serotyped with specific antiserum and determined antimicrobial resistance and minimal inhibitory concentrations for ten antibiotics with Kirby-Bauer tests following the Clinical and Laboratory Standards Institute recommendations. Results: We analyzed 5,251 isolates of Shigella spp., most of them obtained from stools (96.4%); 2,511 (47.8%) were from children under five years of age. The two most common species were S. sonnei (55.1%) and S. fbxneri (41.7%). The highest resistance rate was that of tetracycline (88.1%) followed by trimethoprim-sulfamethoxazole (79.3%) and ampicillin (65.5%); 50.8% of isolates were resistant to chloramphenicol, 43.6% to amoxicillin/clavulanic acid, and less than 1% to cefotaxime, ceftazidime, gentamicin, and ciprofloxacin. In S. sonnei, the most common resistance profile corresponded to trimethoprim-sulfamethoxazole (92%) whereas in S. fbxneri the most common antibiotic profiles were multidrug resistance. Conclusions. In Colombia, children under five years are affected by all Shigella species. These findings should guide funders and public health officials to make evidence-based decisions for protection and prevention measures. The antimicrobial resistance characteristics found in this study underline the importance of combating the dissemination of the most frequently isolated species, S. sonnei and S. ftexneri.

Resumen | Introducción. La shigelosis es endémica en los países de ingresos bajos y medios y ocasiona aproximadamente 125 millones de episodios de diarrea y 160.000 muertes al año, un tercio de los cuales se presenta en niños. Objetivo. Describir las características y los perfiles de resistencia antimicrobiana en aislamientos de Shigella spp. recuperados en Colombia entre 1997 y 2018. Materiales y métodos. Los aislamientos provenían de laboratorios en 29 departamentos de Colombia. La serotipificación se hizo con antisueros específicos de Shigella spp. y, la determinación de los perfiles de resistencia y la concentración inhibitoria mínima de diez antibióticos, por Kirby-Bauer. Resultados. Se estudiaron 5.251 aislamientos de Shigella spp. obtenidos de materia fecal (96,4 %); el 47,8 % de ellos correspondía a niños menores de cinco años. Las especies más frecuentes fueron S. sonnei (55,1 %) y S. ftexneri (41,7 %). Se presentó resistencia a tetraciclina (88,1 %), trimetoprim-sulfametoxasol (79,3 %), ampicilina (65,5 %), cloranfenicol (50,8 %) y amoxicilina-acido clavulánico (43,6 %). La resistencia no superó el 1 % contra cefotaxime, ceftazidima, gentamicina y ciprofloxacina. Para S. sonnei, el perfil de resistencia más frecuente correspondió a trimetoprim-sulfametoxasol, en contraste con S. ftexneri, cuyos perfiles fueron todos multirresistentes. Conclusiones. Los niños menores de cinco años se vieron afectados por todas las especies de Shigella spp., aspecto que los legisladores en salud pública deben considerar a la hora de tomar decisiones en torno a las medidas de prevención y protección frente a esta enfermedad. Las características de resistencia antimicrobiana de los aislamientos de Shigella spp. en Colombia ponen de manifiesto la importancia de combatir la diseminación de las dos especies más frecuentes en casos clínicos, S. sonnei y S. ftexneri.

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RESUMEN El presente reporte es la descripción original de bla TEM-176. Se caracterizaron los mecanismos de resistencia a antimicrobianos de un aislamiento de Escherichia coli enterotoxigénica, determinándose la resistencia a 22 antimicrobianos categorizados en 15 grupos diferentes mediante difusión en agar, estableciéndose grupo filogenético, mecanismos de resistencia y presencia de integrones de Clase 1 y 2 mediante PCR. Integrones y genes de resistencia a β-lactámicos fueron secuenciados. El aislamiento del grupo filogenético A, mostró resistencia o sensibilidad disminuida a ampicilina, amoxicilina más ácido clavulánico, ácido nalidíxico, ciprofloxacino, estreptomicina, kanamicina, tetraciclina, trimetoprim, sulfisoxazol, cotrimoxazol, azitromicina y nitrofurantoina, detectándose la presencia de bla TEM, aadA1/2, aphA1, sul3, tet(A) y un integron de Clase 2 conteniendo un gen dfrA1. La resistencia a quinolonas se relacionó con la substitución Ser83Ala. La secuencia de TEM mostró la substitución Ala222Val, la cual a la fecha no había sido descrita, reportándose como una nueva β-lactamasa, con el nombre de bla TEM-176.

ABSTRACT The present report is the original description of bla TEM-176. The mechanisms of resistance to antimicrobial agents were determined in an enterotoxigenic Escherichia coli, determining the susceptibility to 22 antimicrobials classified in 15 different groups by agar diffusion and establishing the phylogenetic group, mechanisms of resistance and presence of Class 1 and 2 integrons. Integrons and β-lactam resistance genes were sequenced. The isolate, belonging to phylogenetic group A, showed the presence of resistance or diminished susceptibility to a ampicillin, amoxicillin plus clavulanic acid, nalidíxic acid, ciprofloxacin, streptomycin, kanamycin, tetracycline, trimethoprim, sulfisoxazole, cotrimoxazole, azithromycin and nitrofurantoin, carrying bla TEM, aadA1/2, aphA1, sul3, tet(A) and a Class 2 integron containing a dfrA1 gene. Quinolone resistance was related to the substitution Ser83Ala. The TEM sequencing showed the presence of the new substitution Ala222Val, which led to the description of the new β-lactamase bla TEM-176.

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RESUMEN El presente reporte es la descripción original de bla TEM-176. Se caracterizaron los mecanismos de resistencia a antimicrobianos de un aislamiento de Escherichia coli enterotoxigénica, determinándose la resistencia a 22 antimicrobianos categorizados en 15 grupos diferentes mediante difusión en agar, estableciéndose grupo filogenético, mecanismos de resistencia y presencia de integrones de Clase 1 y 2 mediante PCR. Integrones y genes de resistencia a β-lactámicos fueron secuenciados. El aislamiento del grupo filogenético A, mostró resistencia o sensibilidad disminuida a ampicilina, amoxicilina más ácido clavulánico, ácido nalidíxico, ciprofloxacino, estreptomicina, kanamicina, tetraciclina, trimetoprim, sulfisoxazol, cotrimoxazol, azitromicina y nitrofurantoina, detectándose la presencia de bla TEM, aadA1/2, aphA1, sul3, tet(A) y un integron de Clase 2 conteniendo un gen dfrA1. La resistencia a quinolonas se relacionó con la substitución Ser83Ala. La secuencia de TEM mostró la substitución Ala222Val, la cual a la fecha no había sido descrita, reportándose como una nueva β-lactamasa, con el nombre de bla TEM-176.

ABSTRACT The present report is the original description of bla TEM-176. The mechanisms of resistance to antimicrobial agents were determined in an enterotoxigenic Escherichia coli, determining the susceptibility to 22 antimicrobials classified in 15 different groups by agar diffusion and establishing the phylogenetic group, mechanisms of resistance and presence of Class 1 and 2 integrons. Integrons and β-lactam resistance genes were sequenced. The isolate, belonging to phylogenetic group A, showed the presence of resistance or diminished susceptibility to a ampicillin, amoxicillin plus clavulanic acid, nalidíxic acid, ciprofloxacin, streptomycin, kanamycin, tetracycline, trimethoprim, sulfisoxazole, cotrimoxazole, azithromycin and nitrofurantoin, carrying bla TEM, aadA1/2, aphA1, sul3, tet(A) and a Class 2 integron containing a dfrA1 gene. Quinolone resistance was related to the substitution Ser83Ala. The TEM sequencing showed the presence of the new substitution Ala222Val, which led to the description of the new β-lactamase bla TEM-176.

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La elevada incidencia del Enterococcus faecalis en procedimientos odontológicos es un tópico de interés para el área de la salud, esta bacteria resiste a varios antimicrobianos y su proliferación aumenta debido a su baja susceptibilidad a sustancias de uso convencional como el hidróxido de calcio, convirtiéndose en una de las principales causas del fracaso de los tratamientos de conduc- to. La presente investigación evaluó la susceptibilidad in vitro del Enterococcus faecalis cepa ATCC-29212 frente a la combinación de sustancias y antibióticos con el hidróxido de calcio. Se utilizó la técnica de difusión en agar, inoculando el microorganismo en cajas de Petri con agar Cerebro Corazón (BHI), tratado con discos de papel filtro impregnados con 1µl de cada trata- miento por triplicado; T1 (Hidróxido de Calcio + propilenglicol), T2 (Hidróxido de Calcio + paramonoclorofenol), T3 (Hidróxido de Calcio + ampicilina gentamicina + propilenglicol), T4 (Hidróxido de Calcio + Solución Salina Fisiológica), Control positivo (medicamento comercial a base de Hidróxido de Calcio), se incubó a 35°C durante 24h, los halos formados alrededor de cada disco fueron medidos y comparados con la escala de Duraffourd y procesados mediante ANOVA de un factor. Se obtuvo una medida del halo de inhibición de 22,50±3,3 mm, con el trata- miento T3, siendo sumamente sensible. Concluyendo que este resultó el más efectivo en compa- ración el resto de la pruebas in vitro en comparación con el resto de los fármaco investigados.

The high incidence of Enterococcus faecalis in dental procedures is a topic of interest for the health area. This bacterium resists various antimicrobials and its proliferation increases due to its low susceptibility to substances of conventional use such as calcium hydroxide, becoming a of the main causes of root canal failure. The present investigation evaluated the in vitro suscepti- bility of Enterococcus faecalis strain ATCC-29212 to the combination of substances and antibio - tics with calcium hydroxide. The agar diffusion technique was used, inoculating the microorga- nism in Petri dishes with Brain Heart agar (BHI), treated with filter paper disks impregnated with 1µl of each treatment in triplicate; T1 (Calcium Hydroxide + propylene glycol), T2 (Cal- cium Hydroxide + paramonochlorophenol), T3 (Calcium Hydroxide + ampicillin gentamicin + propylene glycol), T4 (Calcium Hydroxide + Physiological Saline Solution), Positive control (Hydroxide-based commercial medicine Calcium), incubated at 35 ° C for 24h, the halos formed around each disc were measured and compared with the Duraffourd scale and processed by one-factor ANOVA. A measure of the inhibition halo of 22.50 ± 3.3 mm was obtained with the T3 treatment, being extremely sensitive. It was concluded that this was the most effective in comparison with the rest of the in vitro tests of the rest of the investigated drugs.

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RESUMO Estações de tratamento de esgotos (ETEs) estão entre as principais fontes de disseminação de bactérias resistentes a antibióticos (BRAs) e genes de resistência (GRAs) no ambiente. Este trabalho quantificou a ocorrência de bactérias resistentes aos antibióticos ampicilina e cloranfenicol no esgoto bruto (EB), no efluente tratado (ET) e no lodo de duas ETEs em escala plena por um período de nove meses. As unidades investigadas utilizavam os seguintes sistemas de tratamento: ETE-A, sistema de lodos ativados convencional; e a ETE-B, reatores anaeróbios (UASB) seguidos de filtros biológicos percoladores (FBP). Os resultados evidenciaram que a ETE-A foi mais eficiente na redução das concentrações de bactérias resistentes à ampicilina e ao cloranfenicol (cerca de 1,1 e 0,7 log10UFC.mL−1 de remoção, respectivamente), quando comparada com a ETE-B (0,5log10 UFC.mL−1 de remoção para as bactérias resistentes ao cloranfenicol e nenhuma remoção para as resistentes à ampicilina). As amostras de lodo, de ambas ETEs, apresentaram elevadas concentrações de bactérias heterotróficas totais — BHTs (4,8-7,6 log10UFC.mL−1) e de BRAs (3,0-6,3 log10UFC.mL−1). A maioria das cepas resistentes à ampicilina e ao cloranfenicol isoladas foi identificada como sendo da família Enterobacteriaceae. Algumas das espécies identificadas são bactérias potencialmente patogênicas, tais como: Klebsiella pneumoniae, Aeromonas hydrophila, Escherichia coli, Enterococcus faecium, Salmonella spp. Os resultados chamam a atenção para a disseminação de BRAs, potencialmente patogênicas, no meio ambiente a partir do efluente final (proveniente do tratamento secundário) das ETEs, independentemente do tipo de sistema adotado. Fica evidente que para reduzir significativamente a concentração das BRAs no ET, este deveria passar por tratamento adicional e desinfecção.

ABSTRACT Sewage treatment plants (STP) are among the main sources of dissemination of antibiotic-resistant bacteria (ARB) and antibiotic-resistance genes (ARG) into the environment. This work quantified the occurrence of cultivable ampicilin-resistant and chloramphenicol-resistant bacteria in raw sewage, treated effluent and sludge samples from two full-scale STP over nine months. The STP investigated used the following treatment systems: STP-A used conventional activated sludge system; and STP-B, anaerobic reactors (UASB) followed by percolating biological filters (PBF). Results showed that was more efficient in reducing the concentrations of ampicilin- and chloramphenicol-resistant bacteria (around 1.1 and 0.7 log10UFC.mL−1, respectively) when compared to STP-B (0.5 log10 UFC.mL−1 removal of cloramphenicol-resistant bacteria and no-removal of ampicilin-resistant bacteria). Sludge samples, from both STP, showed high concentrations of total heterotrophic bacteria (THB; 4.8-7.6 log10UFC.mL−1) and ARB (3.0-6.3 log10UFC.mL−1). Most of the isolated ampicilin- and chloramphenicol-resistant strains were identified as members of the Enterobacteriaceae family. Some of the identified species are potential pathogenic bacteria, such as Klebsiella pneumoniae, Aeromonas hydrophila, Escherichia coli, Enterococcus faecium, Salmonella spp. These results call attention to the spread of ARB, potentially pathogenic, in the environment from the final effluent (from secondary effluent) on the STP, regardless of the type of system adopted. It is evident that in order to significantly reduce the concentration of ARB in the treated effluent, it should undergo additional treatment and disinfection.

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BACKGROUND: Inadvertent epidural drug administration is associated with morbidity and mortality. Several drugs have been administered accidentally through the epidural catheter and most of our knowledge is based on case reports. CASE REPORT: A 33 year-old woman presented for delivery. Placement of epidural catheter was requested for labor analgesia and priming dose was administered. Five minutes later, ampicillin 1g was given through the catheter inadvertently without hemodynamic or neurological changes. Ropivacaine administration was repeated, always with symptomatic relief until delivery. At hospital discharge, she remained without neurological or hemodynamic alterations. CONCLUSIONS: The majority of errors are due to syringe and drug exchanges, and inadvertent route administration. Erroneous administration into the epidural space can have immediate and late effects and there is no definitive and effective treatment. There are several preventive measures to reduce the potential complications; some opt for watchful waiting, others opt for administering other drugs as a dilution attempted.

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Abstract Background: Inadvertent epidural drug administration is associated with morbidity and mortality. Several drugs have been administered accidentally through the epidural catheter and most of our knowledge is based on case reports. Case report: A 33 year-old woman presented for delivery. Placement of epidural catheter was requested for labor analgesia and priming dose was administered. Five minutes later, ampicillin 1 g was given through the catheter inadvertently without hemodynamic or neurological changes. Ropivacaine administration was repeated, always with symptomatic relief until delivery. At hospital discharge, she remained without neurological or hemodynamic alterations. Conclusions: The majority of errors are due to syringe and drug exchanges and inadvertent route administration. Erroneous administration into the epidural space can have immediate and late effects and there is no definitive and effective treatment. There are several preventive measures to reduce the potential complications; some opt for watchful waiting, others opt for administering other drugs as a dilution attempted.

Resumo Justificativa: A administração inadvertida peridural de drogas está associada à morbidade e mortalidade. Várias drogas foram administradas acidentalmente pelo cateter peridural e a maior parte do que sabemos se baseia em relatos de caso. Relato de caso: Uma gestante de 33 anos chegou em trabalho de parto. Foi solicitada colocação de cateter peridural para analgesia de parto e a dose inicial foi administrada. Cinco minutos depois, 1 g de ampicilina foi dado através do cateter inadvertidamente, sem alterações hemodinâmicas ou neurológicas. A administração de ropivacaína foi repetida, sempre com alívio dos sintomas até o parto. Na alta hospitalar, a paciente continuava sem alterações neurológicas ou hemodinâmicas. Conclusões: A maioria dos erros é por troca de seringa ou drogas, ou administração de rota inadvertida. A administração errônea no espaço peridural pode apresentar efeitos imediatos e tardios e não há tratamento definitivo ou efetivo. Existem várias medidas preventivas para reduzir complicações potenciais; alguns escolhem observação cuidadosa, outros a administração de outras drogas para tentar a diluição.

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