Caracterización clínica y microbiológica de los eventos de peritonitis asociada a diálisis peritoneal en un hospital de Chile. Un análisis retroāspectivo

Introducción: Las infecciones asociadas a diálisis peritoneal constituyen una de las causas de morbimortalidad más importante en estos pacientes y la terapia antimicrobiana empírica y dirigida adecuada es fundamental para mejorar el resultado, por lo que es importante establecer la microbiología local. Objetivo: Revisar la experiencia clínica de cinco años del Hospital Carlos Van Buren de Valparaíso, Chile, describiendo las características clínicas y microbiológicas de los pacientes con episodios de peritonitis asociada a diálisis peritoneal. Metodología De forma retrospectiva se accedió a los registros clínicos de aquellos pacientes mayores de 18 años que presentaron al menos un evento de peritonitis asociada a diálisis peritoneal. Resultados: De un total de 26 episodios, 62% de los pacientes fueron de sexo femenino, con un promedio de edad de 53 años. La principal comorbilidad fue la hipertensión arterial (100%), y el dolor abdominal fue el síntoma más frecuente (85%), con una mortalidad general de 7,7%. En el laboratorio la leucocitosis, la proteína C reactiva (PCR) y la velocidad de hemosedimentación (VHS) fueron los hallazgos más importantes. Predominaron las cocáceas grampositivas (54%), seguido de bacilos gramnegativos no fermentadores y Enterobacterales en igual proporción (11,5% cada grupo). Casos aislados de Candida albicans y Pasteurella canis fueron identificados, y en 15% de los casos el cultivo resultó negativo. Conclusión: Se pudo conocer las características clínicas y microbiológicas locales de esta patología, para así redefinir las directrices de manejo en la institución.

Background: Infections associated with peritoneal dialysis are one of the most important causes of morbidity and mortality in these patients, and adequate empirical and targeted antimicrobial therapy are essential to improve the outcome, so it is important to establish the local microbiology. Aim: To review the clinical experience of 5 years at the Carlos Van Buren Hospital in Valparaíso, Chile, in order to know the clinical and microbiological characteristics of patients with episodes of peritonitis associated with peritoneal dialysis. Methods: Retrospectively, the clinical records of those patients over 18 years of age who presented at least one peritonitis event associated with peritoneal dialysis were accessed. Results: Of a total of 26 episodes, 62% of the patients were female, with a mean age of 53 years. The main comorbidity was arterial hypertension (100%), and abdominal pain was the most frequent symptom (85%), with an overall mortality of 7.7%. In the laboratory parameters, leukocytosis, C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR) were the most important findings. Gram-positive cocci (54%) predominated, followed by Gram-negative non-fermenting and enterobacterial bacilli in the same proportion (11.5% each group). Isolated cases of Candida albicans and Pasteurella canis were identified, and in 15% of the cases the culture was negative. Conclusion: It was possible to know the local clinical and microbiological characteristics of this pathology, in order to redefine management guidelines for our institution.

Diálisis de albúmina de paso único (SPAD) como soporte hepático extracorpóreo en paciente COVID-19 crítico. Caso clínico / Single-pass albumin dialysis as treatment of acute on chronic liver failure during COVID-19 pneumonia. report of one case

Liver transplantation is the only effective therapy to reduce the high mortality associated with acute liver failure and acute on chronic liver failure (ACLF). Single-pass albumin dialysis (SPAD) is an extracorporeal supportive therapy used as a bridge to liver transplantation or regeneration. We report a 44-year-old man with alcoholic cirrhosis admitted for critical COVID-19 pneumonia that evolves with ACLF. SPAD technique was performed completing six sessions, with a reduction of bilirubin and ammonia levels. He evolved with severe respiratory failure and refractory septic shock, dying. SPAD is a safe and efficient technique aimed to eliminate liver toxins, preventing multiorgan damage interrupting the process known as the "autointoxication hypothesis". It is easy to implement in any critical patient unit and has lower costs than other extracorporeal liver support therapies.

Intercambio plasmático terapéutico por plasmafiltración: experiencia de 11 años de un centro / Therapeutic plasma exchange: experience in 102 patients

BACKGROUND: Therapeutic Plasma Exchange (TPE) is a procedure in which plasma and harmful macromolecules are separated from the rest of the blood components by centrifugation or filtration through membranes and are replaced with solutions with albumin and/or plasma. AIM: To communicate our experience using TPE by filtration. MATERIAL AND METHODS: Review of records of 655 TPE sessions performed in 102 patients aged 50 ± 18 years (64% women). The requirement of renal replacement therapy (RRT) and seven days and one year mortality were recorded. RESULTS: Forty five percent of patients had hypertension or diabetes. The main indications for TPE were pulmonary-renal syndrome (PRS) (62%) and antibody mediated graft rejection (29%), followed by neurological diseases (36%). Fifteen percent of patients required RRT for one year. Mortality at seven days and one year was 20 and 30%, respectively. Out of the total of deaths associated with kidney diseases, 88% corresponded to PRS and ANCA vasculitis. The main complications were thrombocytopenia in 41%, hypocalcemia in 18%, and hypotension in 16%. CONCLUSIONS: In our experience, TPE by filtration is a safe technique, with mild and preventable complications. Despite this, the reported mortality is high, which reflects the severity of the diseases that motivated the indication for TPE.

COVID-19, shock séptico refractario y terapia extracorpórea de purificación sanguínea con OXIRIS® / Management of refractory septic shock with blood purification therapy using a special filter: report of one case

Sepsis is one of the leading causes of death in critically ill patients with COVID-19 and blood purification therapies have a role to immunomodulate the excessive inflammatory response and improve clinical results. One of the devices designed for these therapies is the oXiris® filter, allowing to perform renal replacement therapy combined with selective adsorption of endotoxins and cytokines. We report a 55-year-old male with COVID who developed a septic shock secondary to a sepsis caused by Pseudomona aeruginosa, refractory to the usual management. A veno-venous continuous hemofiltration was started using the oXiris® filter for 48 hours. Subsequently, there was an improvement in clinical perfusion parameters and a reduction in inflammatory markers. The patient was discharged from the intensive care one month later.

Trasplante meniscal con aloinjerto cadavérico en adolescente con meniscopatía por menisco discoideo / Meniscal allograft transplantation in adolescent with meniscectomy

La incidencia de lesiones meniscales en adolescentes ha aumentado debido a la creciente tendencia, en este grupo de edad, de realizar actividades deportivas, una mayor sospecha diagnóstica y mejora en los métodos para su detección. Estas lesiones suelen asociarse a otras patologías, como lesiones de ligamento cruzado anterior o la presencia de menisco discoideo, un factor de riesgo importante. El menisco discoideo fue descripto por primera vez por Young en 1889, es una variación congénita morfológica del menisco lateral o medial, caracterizado por una hipertrofia central y un diámetro mayor de lo normal. Puede ser asintomático o manifestarse con dolor, bloqueo, chasquidos e hinchazón. El tratamiento histórico era la meniscectomía completa, la que se asociaba a cambios degenerativos articulares tempranos, por lo que actualmente se preconiza la saucerización como tratamiento de elección; además, se describe el trasplante meniscal como procedimiento de salvataje, en caso de daño meniscal irreparable. Se presenta el caso de una paciente femenina de doce años sometida a este procedimiento con antecedentes de múltiples intervenciones quirúrgicas en la rodilla izquierda, incluida la meniscectomía parcial, sin resultado clínico favorable. Nivel de Evidencia: IV

The incidence of meniscal injuries in adolescents has increased due to the growing tendency to perform sports activities in this age group, greater diagnostic suspicion, and improvement in diagnostic methods. They are usually associated with other pathologies, such as anterior cruciate ligament injuries and an important risk factor is the presence of a discoid meniscus. The discoid meniscus, first described by Young in 1889, is a congenital morphological variation of the lateral or medial meniscus, characterized by central hypertrophy and a larger diameter than normal meniscus. It can be asymptomatic or manifest with pain, blockage, clicking and swelling. The historical treatment was complete meniscectomy, which was associated with early degenerative joint changes, nowadays saucerization is recommended as the treatment of choice. In addition, the meniscal transplant is described as a salvage procedure, in case of irreparable meniscal damage. We present the case of a twelve-year-old female patient who underwent this procedure with a history of multiple surgical interventions on the left knee, including partial meniscectomy, without a favorable clinical result. Level of Evidence: IV

Resultados a largo plazo de una cohorte chilena: la edad del paciente no incide en el resultado del trasplante alogénico de precursores hematopoyéticos para leucemia mieloide aguda

Background: In our country, transplantation centers differ in the age limit for allogeneic hematopoietic transplantation (ALOHT). In our program, transplants with age- adjusted conditioning are performed in patients until 70 years old. Currently more than 60% of ALOHT reported to the Center for International Bone Marrow Transplantation Research (CIBMTR) are performed in patients older than 40 years. Aim: To report our experience with ALOHT in acute myelogenous leukemia (AML), analyzing patient age at transplantation in different periods and transplant results in different age groups. Material and Methods: A retrospective analysis of the database of adult hematopoietic transplants in AML patients was performed. Demographic data, disease characteristics, transplant data, survival and relapse times, and mortality were collected. Results: In our program, 1030 transplants were performed in adults and 119 ALOHT were performed in AML patients, between 1990 and 2020. The median age of patients in all periods was 41 years, (range 16-69). The median age was 33 and 45 years, in the periods 1990-2000 and 2000-2020 respectively (p < 0.01). Seventy-eight patients received myeloablative conditioning (median age 44 years) and 41 reduced intensity conditioning (median age 53 years). Five-year overall survival was 44.6% (confidence intervals (CI) 41-48). Non relapse mortality of all periods was 19% (CI 17 - 40%) and relapse rate was 17 % (CI 16-22). No difference in five years overall survival among patients younger than 40, 41 to 50 and over 51 years was observed. Conclusions: Overall Survival, non-relapse mortality and relapse rate were similar in younger and older patients in our program and similar to those previously reported in other centers.

Necrosis papilar renal bilateral de resolución espontánea como causa de hematuria microscópica. Caso clínico / Bilateral renal papillary necrosis of spontaneous resolution as a cause of microscopic hematuria. Report of one case

Renal papillary necrosis is an infrequent cause of hematuria characterized by ischemic necrosis of the renal medulla, especially the papilla. Its most common cause is analgesic abuse. Despite being oligo-symptomatic, in many cases its presence is associated with serious functional sequelae. Imaging, especially computed tomography, is essential to make the diagnosis. We report a 63-year-old female studied for an asymptomatic microscopic hematuria whose tomographic study showed a bilateral renal papillary necrosis. No etiology was found, and she evolved with a spontaneous complete remission.

Severe acute respiratory infections (SARI) from influenza in adult patients in Chile: the experience of a sentinel hospital / La infección respiratoria aguda grave asociada a la gripe en pacientes adultos en Chile: experiencia de un hospital centinela / Infecção respiratória aguda grave (SARI) decorrente da influenza em pacientes adultos no Chile: experiência de um hospital-sentinela

ABSTRACT Objective To 1) describe clinical characteristics of adult patients in Chile with severe acute respiratory infections (SARI) associated with influenza viruses, and 2) analyze virus subtypes identified in specimens collected from those patients, hospital resources used in clinical management, clinical evolution, and risk factors associated with a fatal outcome, using observational data from the SARI surveillance network (SARInet). Methods Adults hospitalized from 1 July 2011 to 31 December 2015 with influenza-associated SARI at a SARI sentinel surveillance hospital in Santiago were identified and the presence of influenza in all cases confirmed by reverse transcription polymerase chain reaction (RT-PCR), using respiratory samples. Results A total of 221 patients (mean age: 74.1 years) were hospitalized with influenza-associated SARI during the study period. Of this study cohort, 91.4% had risk factors for complications and 34.3% had been vaccinated during the most recent campaign. Pneumonia was the most frequent clinical manifestation, occurring in 57.0% of the cohort; other manifestations included influenza-like illness, exacerbated chronic bronchitis, decompensated heart failure, and asthmatic crisis. Cases occurred year-round, with an epidemic peak during autumn-winter. Both influenza A (H1N1pdm09 and H3N2) and B virus co-circulated. Critical care beds were required for 26.7% of the cohort, and 19.5% needed ventilatory assistance. Multivariate analysis identified four significant factors associated with in-hospital mortality: 1) being bedridden (adjusted odds ratio (aOR): 22.3; 95% confidence interval (CI): 3.0-164); 2) admission to critical care unit (aOR: 8.9; CI: 1.44-55); 3) Pa02/Fi02 ratio < 250 (aOR: 5.8; CI: 1.02-33); and 4) increased serum creatinine concentration (> 1 mg/dL) (aOR: 5.47; CI: 1.20-24). Seasonal influenza vaccine was identified as a significant protective factor (aOR: 0.14; CI: 0.021-0.90). Conclusions Influenza-associated SARI affected mainly elderly patients with underlying conditions. Most patients evolved to respiratory failure and more than one-quarter required critical care beds. Clinical presentation was variable. Death was associated with host characteristics and disease-associated conditions, and vaccine was protective. Virus type did not influence outcome.

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RESUMO Objetivo Descrever as características clínicas de pacientes adultos com infecção respiratória aguda grave (SARI) associada ao vírus da influenza e analisar os subtipos virais identificados em amostras coletadas destes pacientes, os recursos hospitalares empregados no tratamento clínico, a evolução clínica e os fatores de risco clínicos associados a um desfecho fatal, a partir de dados observacionais da rede de vigilância de SARI (SARInet) no Chile. Métodos Foram identificados os adultos hospitalizados com SARI associada a influenza em um hospital-sentinela de vigilância de SARI, em Santiago, de 1o de julho de 2011 a 31 de dezembro de 2015. A ocorrência de influenza foi confirmada em amostras respiratórias em todos os casos com a reação em cadeia da polimerase via transcriptase reversa (RT-RCP). Resultados Ao todo, 221 pacientes (idade média de 74,1 anos) foram hospitalizados com SARI associada a influenza no período de estudo. Nesta coorte, 91,4% apresentavam fatores de risco para complicação e 34,3% haviam sido vacinados na última campanha de vacinação. Pneumonia foi a manifestação clínica mais frequente, ocorrendo em 57,0% da coorte. Outras manifestações foram doença gripal, bronquite crônica exacerbada, insuficiência cardíaca descompensada e crise asmática. Os casos estiveram distribuídos ao longo do ano, com pico epidêmico no outono-inverno. Houve circulação simultânea dos vírus da influenza A (H1N1pdm09 e H3N2) e B. Leitos de terapia intensiva foram necessários em 26,7% da coorte e suporte ventilatório, em 19,5%. Na análise multivariada, quatro fatores importantes associados à mortalidade hospitalar foram identificados: estar restrito ao leito (odds ratio ajustado [ORaj] 22.3; intervalo de confiança de 95% [IC 95%] 3.0-164); ser admitido na unidade de terapia intensiva (ORaj 8.9, IC 95% 1.4 4-55); relação Pa02/Fi02 <250 (ORaj 5.8; IC 95% 1.02-33) e aumento da creatinina sérica (>1 mg/dl) (ORaj 5.47; IC 95% 1.20-24). A vacinação sazonal contra influenza foi identificada como importante fator de proteção (ORaj 0.14; IC 95% 0.021-0.90). Conclusões A SARI associada a influenza acometeu sobretudo pacientes idosos com doenças preexistentes. A maioria dos pacientes evoluiu com insuficiência respiratória e mais de um quarto precisou de cuidados intensivos. O quadro clínico foi variável. Morte foi associada às características do hospedeiro e problemas relacionados à doença. A vacinação teve efeito protetor e o tipo viral não influiu no desfecho.