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In recent decades, the development of new drugs has become increasingly expensive and inefficient, and the molecular mechanisms of most pharmaceuticals remain poorly understood. In response, computational systems and network medicine tools have emerged to identify potential drug repurposing candidates. However, these tools often require complex installation and lack intuitive visual network mining capabilities. To tackle these challenges, we introduce Drugst.One, a platform that assists specialized computational medicine tools in becoming user-friendly, web-based utilities for drug repurposing. With just three lines of code, Drugst.One turns any systems biology software into an interactive web tool for modeling and analyzing complex protein-drug-disease networks. Demonstrating its broad adaptability, Drugst.One has been successfully integrated with 21 computational systems medicine tools. Available at https://drugst.one, Drugst.One has significant potential for streamlining the drug discovery process, allowing researchers to focus on essential aspects of pharmaceutical treatment research.
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Reposicionamiento de Medicamentos , Programas Informáticos , Reposicionamiento de Medicamentos/métodos , Humanos , Internet , Descubrimiento de Drogas/métodos , Biología de Sistemas/métodos , Biología Computacional/métodosRESUMEN
Various complications occur after a biliary-digestive reconstruction. Volvulus of a segment of the biliodigestive loop has not been described. Two patients who underwent biliodigestive bypass, years later, began with sudden and intense abdominal pain, associated with a volvulus with necrosis of a segment of this biliodigestive loop. This complication occurred many years after the initial correction, and manifested with sudden abdominal pain without impaired liver function, as occurred in these patients.
Diversas complicaciones pueden ocurrir después de una reconstrucción biliodigestiva. El vólvulo de un segmento del asa biliodigestiva no ha sido descrito. Dos pacientes operados de derivación biliodigestiva, años después iniciaron con dolor abdominal súbito e intenso, asociado a un vólvulo con necrosis de un segmento de la asa interpuesta. Se ha descrito el vólvulo de toda el asa interpuesta, pero no el de solo una pequeña porción de esta. La complicación ocurrió muchos años después de la corrección inicial y se manifiesto con dolor abdominal súbito sin deterioro de la función hepática, como sucedió en estos pacientes.
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Vólvulo Intestinal , Niño , Humanos , Vólvulo Intestinal/etiología , Vólvulo Intestinal/cirugía , Anastomosis en-Y de Roux , Dolor Abdominal/etiología , Complicaciones Posoperatorias/etiología , Complicaciones Posoperatorias/cirugíaRESUMEN
In recent decades, the development of new drugs has become increasingly expensive and inefficient, and the molecular mechanisms of most pharmaceuticals remain poorly understood. In response, computational systems and network medicine tools have emerged to identify potential drug repurposing candidates. However, these tools often require complex installation and lack intuitive visual network mining capabilities. To tackle these challenges, we introduce Drugst.One, a platform that assists specialized computational medicine tools in becoming user-friendly, web-based utilities for drug repurposing. With just three lines of code, Drugst.One turns any systems biology software into an interactive web tool for modeling and analyzing complex protein-drug-disease networks. Demonstrating its broad adaptability, Drugst.One has been successfully integrated with 21 computational systems medicine tools. Available at https://drugst.one, Drugst.One has significant potential for streamlining the drug discovery process, allowing researchers to focus on essential aspects of pharmaceutical treatment research.
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PURPOSE: To evaluate the safety and efficacy of conventional laparoscopic vs open Lich-Gregoir ureteral reimplantation in pediatric vesicoureteral reflux. MATERIAL AND METHODS: A retrospective study was conducted in a tertiary care hospital. Patients with vesicoureteral reflux who underwent open or laparoscopic Lich-Gregoir ureteral reimplantation from 2013-2020 were included. The primary outcome was resolution of reflux. Complications and perioperative characteristics were evaluated. The outcomes between open and laparoscopic surgery were analyzed. RESULTS: A total of 110 patients and 150 ureters were included. The mean age was 4.5 years ± 3.4 and 73.6% were females. A total of 125 ureters (83.3%) underwent laparoscopic and 25 (16.6%) open Lich-Gregoir vesicoureteral reimplantation (5:1 Ratio). Resolution was reported in 112 (89.6%) for laparoscopy and 21 (84%) for open surgery (P = .42). Mean surgical time for laparoscopy and open surgery were 142.4 min ± 64.4 and 153 min ± 40, respectively (P =.29). Mean bleeding (9.5 mL ± 11.2 vs 29.6 mL ± 22.8) and length of hospital stay (2.4 days ± 2.3 vs 5.05 ± 3.1) were significantly higher with open surgery (P < .001). No significant difference in complications was reported between open surgery (32%) and laparoscopic approach (22.4%) (P = .305). CONCLUSION: Conventional laparoscopic vesicoureteral reimplantation with the Lich-Gregoir technique has an acceptable success rate comparable with open surgery, with shorter hospital stay, less bleeding, and less need of transfusion.
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Laparoscopía , Humanos , Niño , Preescolar , Estudios Retrospectivos , Laparoscopía/efectos adversosRESUMEN
Background: Minimally invasive surgery has a different visual and tactile perception compared with conventional surgery, which could lead to complications, especially in complex procedures. In these cases, flexible endoscopy can facilitate and prevent complications in minimally invasive procedures in children. The study aimed to clarify the utility of intraoperative endoscopy as an adjuvant to minimally invasive surgery in children. Materials and Methods: This retrospective study reviewed the medical records of pediatric patients who had undergone endoscopy during a minimally invasive surgery to treat an upper digestive pathology between January 2000 and December 2020. Results: The study included 83 patients who underwent a laparoscopic procedure with simultaneous endoscopy. The diagnosis was peptic stenosis in 9 patients, achalasia in 23, congenital embryonic tracheobronchial remnants in 4, re-fundoplication in 42, esophageal duplication in 2, superior mesenteric artery syndrome in 2, and giant gastric hemangioma in 1 patient. With adjuvant endoscopy, 7 digestive perforations were noted, 11 cases of short esophagus were diagnosed, and the permeability of the anastomosis was confirmed in 6 cases. No complications were related with the endoscopy procedures. Discussion: Minimally invasive surgery has a few special and tactile limitations that can lead to complications in certain procedures. Simultaneous digestive endoscopy in the upper gastrointestinal tract facilitates organ identification and dissection. Conclusion: Digestive endoscopy is an excellent adjunct to minimally invasive surgery in children because it facilitates and identifies complications and ensures safer minimally invasive surgeries. Future prospective studies are required to assess this conclusion.
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Laparoscopía , Pediatría , Niño , Fundoplicación , Humanos , Procedimientos Quirúrgicos Mínimamente Invasivos , Estudios RetrospectivosRESUMEN
Resumen Introducción: Se define como quiste de colédoco gigante aquel con un diámetro ≥ 10 cm. A pesar de que el abordaje laparoscópico ha sido contraindicado, se presenta el caso de un adolescente con un quiste de colédoco gigante resuelto por laparoscopía. Caso clínico: Paciente de sexo masculino de 14 años con un quiste de colédoco gigante tratado con anastomosis hepático-duodenal laparoscópica. Conclusiones: El tamaño promedio de los quistes de colédoco tratados por laparoscopía es de 40 mm. No se recomienda la resección de quistes gigantes por mínima invasión debido a adherencias y restricción del campo visual. En este caso se realizó un tratamiento laparoscópico de manera exitosa.
Abstract Background: The giant choledochal cyst has a diameter ≥ 10 cm. Although laparoscopy has been contraindicated, we present the case of a teenager with a giant choledochal cyst resolved by laparoscopy. Case report: A 14-year-old male patient with a giant choledochal cyst treated with hepatic-duodenum laparoscopic anastomosis. Conclusions: The average size of bile duct cysts treated by laparoscopy is 40 mm. Giant cysts should not be resected through minimal invasion due to adhesions and a restricted visual field. We report a case of a giant cyst successfully treated by laparoscopy.
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Introducción: Se define como quiste de colédoco gigante aquel con un diámetro ≥ 10 cm. A pesar de que el abordaje laparoscópico ha sido contraindicado, se presenta el caso de un adolescente con un quiste de colédoco gigante resuelto por laparoscopía. Caso clínico: Paciente de sexo masculino de 14 años con un quiste de colédoco gigante tratado con anastomosis hepático-duodenal laparoscópica. Conclusiones: El tamaño promedio de los quistes de colédoco tratados por laparoscopía es de 40 mm. No se recomienda la resección de quistes gigantes por mínima invasión debido a adherencias y restricción del campo visual. En este caso se realizó un tratamiento laparoscópico de manera exitosa.
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ANTECEDENTES: La pancreatitis es una enfermedad rara. La obstrucción es común y se puede corregir con endoscopia; si fracasa, necesitará cirugía. CASO CLÍNICO: Reportamos un paciente con pancreatitis secundaria a páncreas divisum. Se realizó derivación tipo DuVal laparoscópica. Varón de 12 años, con múltiples cuadros de pancreatitis y fallidos intentos de esfinteroplastias. La colangiorresonancia mostró páncreas divisum. Se realizó una derivación tipo DuVal por laparoscopia. Seguimiento de 5 años. No ha habido recurrencia del dolor y la lipasa se normalizó a los 6 meses. El conducto pancreático no estaba dilatado. Ante la dificultad para hacer una anastomosis lateral se utilizó la técnica laparoscópica propuesta por DuVal. BACKGROUND: Pancreatitis is rare. Obstruction is common. They can be corrected with endoscopy, if they fail they need surgery. CASE REPORT: We reported a patient with pancreatitis secondary to pancreas divisum, laparoscopic DuVal shunt was performed. Male 12 years, multiple pancreatitis pictures and failed sphinteroplasty attempts. Colangio resonance showed pancreas divisum. A DuVal-type shunt was built for laparoscopy. Follow-up 5 years. There has been no recurrence of pain and lipase was normalized at 6 months. The pancreatic duct was not dilated, in the face of difficulty making a lateral anastomosis was used the technique proposed by DuVal by laparoscopic approach.
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Laparoscopía , Pancreatitis Crónica , Anastomosis Quirúrgica , Niño , Humanos , Masculino , Recurrencia Local de Neoplasia , Pancreatitis Crónica/cirugía , Estudios RetrospectivosRESUMEN
INTRODUCCIÓN: Las hernias femorales son raras en la infancia. El defecto está abajo del ligamento inguinal. La frecuencia de un diagnóstico erróneo es de hasta el 75%. Pueden ser resueltas mediante cirugía abierta o laparoscópica. OBJETIVO: Comunicar el caso de un niño con hernia femoral resuelto mediante laparoscopía. CASO CLÍNICO: Varón de 5 años, con antecedente de criptorquidia bilateral resuelta a los 2 años de edad. Padecimiento actual con 1 mes de evolución, con aumento de volumen en el tercio externo de la ingle. El ultrasonido reportó un defecto aponeurótico junto a los vasos femorales derechos. Abordaje laparoscópico, con hallazgos de defecto por abajo del ligamento inguinal. Sin recidiva a los 12 meses de seguimiento. DISCUSIÓN: Las hernias femorales son raras en los niños y su diagnóstico es difícil. La exploración laparoscópica permitió identificarla al encontrar un defecto por abajo del ligamento inguinal y junto a los vasos femorales independiente del anillo inguinal profundo y de la fascia transversal. INTRODUCTION: Femoral hernias are rare in children. The defect is below the inguinal ligament. The frequency of a misdiagnosis is up to 75%. They can be resolved by open or laparoscopic surgery. OBJECTIVE: To report the case of a child with femoral hernia, resolved by laparoscopy. CASE REPORT: Male, 5 years old, with a history of bilateral cryptorchidism resolved at 2 years of age. Current condition with a month of evolution with an increase in volume in the outer third of the groin. Ultrasound reported aponeurotic defect along with the right femoral vessels. Laparoscopic approach, with defect findings below the inguinal ligament. No recurrence at 12 months follow-up. DISCUSSION: Femoral hernias are rare in children, their diagnosis is difficult. Laparoscopic examination allowed its identification, finding a defect below the inguinal ligament and adjacent to the femoral vessels independent of the deep inguinal ring and the transversalis fascia.
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Hernia Femoral , Laparoscopía , Niño , Preescolar , Hernia Femoral/diagnóstico , Hernia Femoral/cirugía , Humanos , Masculino , UltrasonografíaRESUMEN
BACKGROUND: Graph edit distance is a methodology used to solve error-tolerant graph matching. This methodology estimates a distance between two graphs by determining the minimum number of modifications required to transform one graph into the other. These modifications, known as edit operations, have an edit cost associated that has to be determined depending on the problem. OBJECTIVE: This study focuses on the use of optimization techniques in order to learn the edit costs used when comparing graphs by means of the graph edit distance. METHODS: Graphs represent reduced structural representations of molecules using pharmacophore-type node descriptions to encode the relevant molecular properties. This reduction technique is known as extended reduced graphs. The screening and statistical tools available on the ligand-based virtual screening benchmarking platform and the RDKit were used. RESULTS: In the experiments, the graph edit distance using learned costs performed better or equally good than using predefined costs. This is exemplified with six publicly available datasets: DUD-E, MUV, GLL&GDD, CAPST, NRLiSt BDB, and ULS-UDS. CONCLUSION: This study shows that the graph edit distance along with learned edit costs is useful to identify bioactivity similarities in a structurally diverse group of molecules. Furthermore, the target-specific edit costs might provide useful structure-activity information for future drug-design efforts.
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Gráficos por Computador/economía , Aprendizaje , Bases de Datos Factuales , Evaluación Preclínica de Medicamentos/economía , LigandosRESUMEN
BACKGROUND: Short esophagus is a disability to obtain a proper portion of abdominal esophagus, thus a lengthening technique is required. Collis approach is the best option. OBJECTIVE: To demonstrate effectiveness of laparoscopic Collis-Nissen approach in children. METHOD: Retrospective and descriptive case series performed in children with reflux and short esophagus, Collis esophagoplasty was carried out with stapler, together with fundoplication. Age, symptomatology, surgical background, oral nutrition beginning, hospital stay, complications and reflux control were recorded. RESULTS: Eight children, 4-15 years old were treated from 2005 to 2017. Three of them with slipped fundoplication background and two with esophageal atresia. The rest of the children had no background, two of them with stenosis. Symptoms; cough 8/8, abdominal pain 5/8, dysphagia 3/8. Without complications. Oral nutrition beginning at the 5th day. Up to 10 years follow-up, with complete remission of the symptomatology in 6 years. DISCUSSION: Since a true short esophagus diagnosis depends on transurgical findings, pediatric surgeons should notice this entity when practicing any antireflux procedure. Laparoscopic Collis-Nissen approach is safe and efficient in these patients.
ANTECEDENTES: El esófago corto es la imposibilidad de obtener una porción adecuada de esófago abdominal, por lo que se requiere alguna técnica de alargamiento. La mejor opción es el procedimiento de Collis. OBJETIVO: Demostrar la eficacia del procedimiento de Collis-Nissen por laparoscopía en niños. MÉTODO: Estudio retrospectivo, descriptivo, serie de casos, niños con reflujo y esófago corto, esofagoplastía de Collis con engrapadora y funduplicatura. Se analizaron edad, sintomatología, antecedentes quirúrgicos, tiempo quirúrgico, inicio de vía oral, tiempo de hospitalización, complicaciones y control del reflujo. RESULTADOS: De 2005 a 2017 se trataron ocho niños de 4 a 15 años. De ellos, tres con antecedente de funduplicatura deslizada y dos con antecedente de atresia esofágica. El resto sin antecedentes, dos con estenosis. Síntomas; tos 8/8, dolor abdominal 5/8, disfagia 3/8. Sin complicaciones. Inició de vía oral al quinto día. Seguimiento de hasta 10 años, con remisión total de la sintomatología en seis casos. DISCUSIÓN: Debido a que el diagnóstico de esófago corto verdadero depende de los hallazgos transoperatorios, los cirujanos pediatras deben reconocer esta condición al momento de practicar cualquier procedimiento antirreflujo. El procedimiento de Collis-Nissen laparoscópico es una opción segura y eficaz en estos pacientes.
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Esofagoplastia/métodos , Esófago/cirugía , Fundoplicación/métodos , Reflujo Gastroesofágico/cirugía , Gastroplastia/métodos , Adolescente , Factores de Edad , Niño , Preescolar , Atresia Esofágica/cirugía , Estenosis Esofágica/diagnóstico , Estenosis Esofágica/terapia , Unión Esofagogástrica/anatomía & histología , Esófago/anatomía & histología , Esófago/patología , Femenino , Reflujo Gastroesofágico/complicaciones , Humanos , Laparoscopía/métodos , Tiempo de Internación , Masculino , Mediastino/cirugía , Tempo Operativo , Tamaño de los Órganos , Complicaciones Posoperatorias/diagnóstico , Complicaciones Posoperatorias/cirugía , Complicaciones Posoperatorias/terapia , Estudios Retrospectivos , Evaluación de Síntomas , Resultado del TratamientoRESUMEN
Objective: To review the diagnostic methodology in pediatric patients with obstruction of the lower third of the esophagus as well as minimally invasive therapeutic options. Materials and Methods: Retrospective study carried out reviewing records of children with esophageal obstruction diagnostic, from 2000 to 2018. They were divided into Group I stenosis secondary to reflux; Group II achalasia; and Group III embryonic remnants. Results: Thirty-three patients. Group I: 7; esophageal barium swallow irregular stenosis of the distal third and endoscopy irregular stenosis in 7. Treated with laparoscopic fundoplication 2, Collis Nissen 5. Group II: 22 patients, age X = 11.55 years. All with dysphagia and symmetrical stenosis of esophagogastric junction. Fifteen underwent manometry and all underwent intraoperative endoscopy. All had laparoscopic myotomy, with 2 perforations and no conversions, 2 patients had subsequent dysphagia to solids, and they did not need esophageal dilatation. Group III: 4 patients, stenosis was above esophagogastric junction. On endoscopy, inflammation was present in all 3 with irregular esophagogastric junction and difficulty passing endoscope. Three patients underwent laparoscopic resection and anastomosis. One patient leaked and developed a fistula. One patient has not been operated upon as yet. Conclusions: In those patients, the best surgical option depends upon the diagnosis. Esophageal barium studies and endoscopy allow discerning among them.
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Acalasia del Esófago/cirugía , Fístula Esofágica/etiología , Estenosis Esofágica/cirugía , Unión Esofagogástrica/cirugía , Adolescente , Anastomosis Quirúrgica , Fuga Anastomótica/etiología , Niño , Preescolar , Trastornos de Deglución/etiología , Trastornos de Deglución/cirugía , Dilatación , Endoscopía Gastrointestinal , Acalasia del Esófago/complicaciones , Estenosis Esofágica/complicaciones , Esofagectomía/efectos adversos , Esofagectomía/métodos , Unión Esofagogástrica/anomalías , Femenino , Fundoplicación/efectos adversos , Fundoplicación/métodos , Reflujo Gastroesofágico/cirugía , Humanos , Lactante , Laparoscopía/efectos adversos , Laparoscopía/métodos , Masculino , Manometría , Estudios Retrospectivos , Adulto JovenRESUMEN
OBJECTIVE: To present our experience in the treatment of the severe tracheomalacia by thoracoscopic approach, as well as its diagnostic methodology, surgical technique, post-operatory evolution and complications. CLINICAL CASES: From 2016 to 2017, three patients, 3, 9 and 12 months old, were treated. They showed multiple near sudden death events and had an absolute dependence to assisted ventilation. Pre-operatory bronchoscopy evinced tracheal severe malacia. Thoracic angiotomography discarded other extrinsic tracheal compression causes. A left thoracoscopic aortopexy was practiced with a bronchoscopical trans-operatory control; with improvement in tracheal space. Just one patient is still awaiting cannula removal, without symptomatology recurrence in a 3-20 months follow up. CONCLUSIONS: The thoracoscopic aortopexy is a safe and effective technique to treat primary and severe tracheomalacia in children.
OBJETIVO: Presentar nuestra experiencia en el tratamiento de la traqueomalacia grave por abordaje toracoscópico, la metodología diagnóstica, la técnica quirúrgica, la evolución postoperatoria y las complicaciones. CASOS CLÍNICOS: De 2016 a 2017 se trataron tres pacientes, dos de ellos con traqueomalacia grave y uno con traqueobronquiomalacia grave, de 3 a 12 meses de edad, con peso de 3 a 6 kg, múltiples eventos de casi muerte súbita y dependencia absoluta de ventilación asistida; en otro hospital practicaron traqueostomía, funduplicación y gastrostomía. La broncoscopia preoperatoria mostró malacia traqueal y bronquial grave, y la angiotomografía de tórax descartó otras causas de compresión. Se practicó aortopexia toracoscópica izquierda sin complicaciones, con control broncoscópico transoperatorio que mostró mejoría en la luz traqueal en los tres pacientes y sin recidiva de la sintomatología respiratoria en un seguimiento de 3 a 20 meses. CONCLUSIONES: La aortopexia toracoscópica es una técnica segura y efectiva para el tratamiento de la traqueomalacia primaria grave en los niños.
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Toracoscopía , Traqueomalacia/cirugía , Aorta Torácica/cirugía , Femenino , Humanos , Lactante , Masculino , Índice de Severidad de la Enfermedad , EsternónRESUMEN
INTRODUCTION: Gallbladder volvulus is a rare and difficult to diagnose pediatric entity, its delayed treatment leads to complications. A 9 months old male case solved by laparoscopy is reported. CASE REPORT: Twelve hours of development with irritability, vomiting and fever. Painful abdomen, leukocytosis and ultrasound with perivesicular fluid. Computed tomography revealed cystic bending, increased density and reinforcement of contrast medium. Gallbladder was found volvulated and necrotized by laparoscopy. DISCUSSION: It is a very rare disease. A 9 months old baby was reported in whom a minimally invasive approach allowed diagnosis and safe treatment.
INTRODUCCIÓN: El vólvulo de la vesícula biliar es una entidad rara en pediatría, de diagnóstico difícil, y el retraso de su tratamiento produce complicaciones. Se presenta el caso de un paciente masculino de nueve meses resuelto por laparoscopia. CASO CLÍNICO: 12 horas de evolución con irritabilidad, vómito, fiebre; abdomen doloroso; leucocitosis; y ultrasonido líquido perivesicular. La tomografía computarizada reveló acodamiento del cístico, aumento de la densidad y reforzamiento con el medio de contraste. La laparoscopia encontró vesícula volvulada y necrosada. DISCUSIÓN: Es una enfermedad poco frecuente. Éste es un niño de nueve meses. El abordaje por mínima invasión permitió establecer el diagnóstico y tratamiento con seguridad.
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Enfermedades de la Vesícula Biliar/cirugía , Vólvulo Intestinal/cirugía , Laparoscopía/métodos , Abdomen Agudo/etiología , Enfermedad Aguda , Colecistitis/etiología , Urgencias Médicas , Vesícula Biliar/patología , Gangrena/etiología , Humanos , Lactante , MasculinoRESUMEN
Extended reduced graphs provide summary representations of chemical structures using pharmacophore-type node descriptions to encode the relevant molecular properties. Commonly used similarity measures using reduced graphs convert these graphs into 2D vectors like fingerprints, before chemical comparisons are made. This study investigates the effectiveness of a graph-only driven molecular comparison by using extended reduced graphs along with graph edit distance methods for molecular similarity calculation as a tool for ligand-based virtual screening applications, which estimate the bioactivity of a chemical on the basis of the bioactivity of similar compounds. The results proved to be very stable and the graph editing distance method performed better than other methods previously used on reduced graphs. This is exemplified with six publicly available data sets: DUD-E, MUV, GLL&GDD, CAPST, NRLiSt BDB, and ULS-UDS. The screening and statistical tools available on the ligand-based virtual screening benchmarking platform and the RDKit were also used. In the experiments, our method performed better than other molecular similarity methods which use array representations in most cases. Overall, it is shown that extended reduced graphs along with graph edit distance is a combination of methods that has numerous applications and can identify bioactivity similarities in a structurally diverse group of molecules.
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Biología Computacional/métodos , Gráficos por Computador , Evaluación Preclínica de Medicamentos/métodos , Ligandos , Modelos Moleculares , Conformación Molecular , Interfaz Usuario-ComputadorRESUMEN
El reactor nuclear de agua ligera de alto desempeño es la versión europea del reactor refrigerado por agua supercrítica, propuesto como uno de los candidatos para la Generación IV de reactores nucleares. En este trabajo se evaluó la capacidad para predecir el comportamiento de la transferencia de calor hacia el agua supercrítica en los subcanales de 1/8 del conjunto combustible del HPLWR, mediante códigos de la Dinámica de Fluidos Computacional utilizando dos modelos de turbulencia: el modelo de esfuerzos de Reynolds, desarrollado por Speziale y el modelo k-ω de transporte de esfuerzos cortantes. Se realizó un estudio de sensibilidad de malla que garantizó la independencia de los resultados numéricos respecto del tamaño y distribución de los elementos de la malla. Se calcularon las distribuciones axiales de temperatura en la envoltura y en los elementos combustibles, además de las distribuciones de temperatura del agua en la zona refrigerante y en la zona moderadora. Se compararon los resultados de los dos modelos de turbulencia y se mostró que no se obtuvo ninguna diferencia apreciable en los valores de la temperatura promedio del agua supercrítica calculada con los modelos de turbulencia utilizados. Sin embargo, los resultados numéricos utilizando el modelo de turbulencia SST mostraron mayores valores de temperatura del combustible y de temperatura superficial de la envoltura de los elementos combustibles que los calculados con el modelo SSG
The high-performance light-water nuclear reactor is the European version of the supercritical water-cooled reactor, proposed as one of the candidates for Generation IV of nuclear reactors. This paper assesses the ability to predict the heat transfer behavior to supercritical water in the sub-channels of the 1/8 HPLWR fuel assembly by codes of Computational Fluid Dynamics using two models of turbulence (the Reynolds stress model developed by Speziale and the k-ω shear stress transport model). A mesh sensitivity study was performed to guarantee the independence of the numerical results regardless the size and distribution of the mesh elements. Temperature distributions were calculated in the fuel rods, in the clad, and in water both in the cooling zone and moderator zone. The results of the two turbulence models were compared. No appreciable difference was obtained in the values of the supercritical water average temperature calculated with the turbulence models used. However, the numerical results using the SST turbulence model show higher values regarding the temperature of both fuel rods and clad surface compared to those calculated with the SSG model
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BACKGROUND: An alternative treatment for obstructive and refluxing obstructive megaureter with ureterovesical junction maintenance through laparoscopy is proposed. MATERIAL AND METHODS: The series consists of 8 cases, all of them studied because of prenatal hydronephrosis or febrile urinary tract infection. Seven were diagnosed with obstructive megaureter and one with obstructive refluxing megaureter. The procedure consisted in incising the stenotic portion of the ureter longitudinally and maintaining its posterior wall attached to the bladder, the anterior wall of the ureter was anastomosed transversally to the bladder mucosa in order to liberate the obstruction. RESULTS: Two of the 8 cases were women and 6 were male. They were aged between 5 months and 11 years (average age of 2.9 years). The surgical time varied between 90 and 120min, with a 48h hospital stay. The permanence of the vesical catheter and the double J stent was of 48h and 6 weeks, respectively. A female patient developed febrile urinary tract infection one week after the surgical procedure. The rest of the patients remained asymptomatic, with normal urinalysis and quarterly urine culture results. Six months after the procedure, the ultrasound showed improvement of the ureteral diameter and of the pyelocaliceal ectasia. The average follow-up was of 2 years. DISCUSSION: The handling of stenosis with longitudinal incision of the ureter and transverse anastomosis to the bladder mucosa, seems promising. The laparoscopic approach allows to identify clearly the longitude of the stenotic segment and join with relative precision such opening with the one of the vesical mucosa.
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Laparoscopía/métodos , Uréter/cirugía , Obstrucción Ureteral/cirugía , Vejiga Urinaria/cirugía , Reflujo Vesicoureteral/complicaciones , Anastomosis Quirúrgica/métodos , Niño , Preescolar , Dilatación Patológica/complicaciones , Dilatación Patológica/cirugía , Femenino , Estudios de Seguimiento , Humanos , Hidronefrosis/complicaciones , Hidronefrosis/embriología , Lactante , Masculino , Stents , Técnicas de Sutura , Uréter/anomalías , Obstrucción Ureteral/etiología , Cateterismo Urinario , Infecciones Urinarias/complicacionesRESUMEN
BACKGROUND: Tracheal bronchus is considered a rare, congenital anomaly, which implies the abnormal origin of a bronchus. When related to repetitive infections the bronchus must be resected, usually via an open procedure. OBJECTIVE: The aim of this paper is to present the case of a patient with tracheal bronchus of the upper right lobe who presented with repetitive pneumonias. Additionally, this text intends to expose the methodology for its diagnosis and surgical resolution through a thoracoscopic lobectomy. CLINICAL CASE: One year old female patient who presented with the disorder at two months of age. The patient presented with constant coughing and persistent fever alongside repetitive pneumonias in the upper right lobe. In order to discard the possibility of gastroesophageal reflux, a bronchoscopy and a panendoscopy of the digestive tube were conducted. The aforesaid procedure demonstrated the existence of a tracheal bronchus located in the right lobe, with functional bronchial segmentation. With these findings and due to the presence of repetitive infections, an apical right lobectomy was performed through a thoracoscopy, with favourable results. CONCLUSIONS: Tracheal bronchus is a rare anomaly that on many occasions is asymptomatic; nonetheless, when related to repetitive infections, a lobectomy must be carried out to avoid further pulmonary damage. This can be done through a thoracoscopy, as was the case with our patient. When treating these patients, it is worth considering they tend to have a different anatomy and to consider the ease at which they can sustain severe inflammation due to repetitive infections.
Asunto(s)
Bronquios/anomalías , Neumonectomía/métodos , Toracoscopía/métodos , Tráquea/anomalías , Bronquios/cirugía , Diagnóstico Diferencial , Femenino , Reflujo Gastroesofágico/diagnóstico , Humanos , Lactante , Recurrencia , Infecciones del Sistema Respiratorio/etiología , Tráquea/cirugíaRESUMEN
OBJETIVO: Describir el papel de la enfermería en el manejo de los síntomas asociados a la espasticidad en esclerosis múltiple (EM). MÉTODO: Se elaboró un estudio descriptivo mediante encuesta sobre la espasticidad en pacientes con EM, que se respondió mediante televotación anónima en una reunión nacional con personal de enfermería implicado en el manejo de estos pacientes. RESULTADOS: En opinión de los participantes, además de la fatiga el síntoma asociado a la espasticidad en EM más notificado por el paciente es la dificultad para caminar, seguido de espasmos y dolor. Los participantes opinan que es importante que enfermería tome: 1) un papel activo en la identificación de estos síntomas, 2) enfocarse en la detección de los factores desencadenantes o agravantes y 3) en prestar soporte en la valoración del nivel de espasticidad mediante el uso de escalas. Es importante informar del correcto uso de los fármacos antiespásticos, de cómo ajustar la dosis y de los efectos secundarios de los tratamientos, entre ellos, delta-9-tetrahidrocanabinol y cannabidiol (THC:CBD) en pulverización bucal, titulando sus dosis según cada paciente, y monitorizando su tolerabilidad, eficacia y adherencia. Aunque se suele disponer de medios para realizar el seguimiento de estos pacientes, todavía hay carencias importantes, entre ellas, la falta de un protocolo de seguimiento concreto. CONCLUSIONES: Enfermería actúa como pieza clave en el proceso de identificación de síntomas, formación y seguimiento de los pacientes con espasticidad en EM
OBJECTIVE: To describe the role of nurses in the management of symptoms related to spasticity in patients with multiple sclerosis (MS). METHOD: A descriptive study was developed based on a questionnaire on spasticity in MS PATIENTS: The questionnarie was completed through an anonymous tele-voting system at a national meeting with nurses involved in the management of these PATIENTS: RESULTS: Apart from fatigue, according to the opinion of the participants, the spasticity symptom associated with MS most notified by patients was difficulty in walking, followed by spasms and pain. Participants thought that it is important that nursing takes: 1) a role in identifying these symptoms, 2) should focus on the detection of the triggering or aggravating factors, and 3) on providing support in the assessment of the level of spasticity. It is important to inform about the correct use of anti-spasticity drugs, how to adjust the dosage and side effects of treatments, including cannabinoids via an oromucosal spray, titrating its doses according to each patient, and monitoring its tolerability, efficacy and adherence. Although there are usually resources to follow up these patients, there are still important gaps, including the lack of a specific follow-up protocol. CONCLUSIONS: Although all the participants are experts in the management of patients with MS, there is still diversity in the functions they perform, and the available resources they have in their hospitals. Nurses act as a key element in the process of identification of symptoms, training and monitoring of these patients with spasticity in EM
Asunto(s)
Humanos , Esclerosis Múltiple/enfermería , Espasticidad Muscular/rehabilitación , Epidemiología Descriptiva , Pautas de la Práctica en Enfermería/tendencias , Dronabinol/uso terapéutico , Cannabinoides/uso terapéuticoRESUMEN
OBJECTIVE: To describe the role of nurses in the management of symptoms related to spasticity in patients with multiple sclerosis (MS). METHOD: A descriptive study was developed based on a questionnaire on spasticity in MS patients. The questionnarie was completed through an anonymous tele-voting system at a national meeting with nurses involved in the management of these patients. RESULTS: Apart from fatigue, according to the opinion of the participants, the spasticity symptom associated with MS most notified by patients was difficulty in walking, followed by spasms and pain. Participants thought that it is important that nursing takes: 1) a role in identifying these symptoms, 2) should focus on the detection of the triggering or aggravating factors, and 3) on providing support in the assessment of the level of spasticity. It is important to inform about the correct use of anti-spasticity drugs, how to adjust the dosage and side effects of treatments, including cannabinoids via an oromucosal spray, titrating its doses according to each patient, and monitoring its tolerability, efficacy and adherence. Although there are usually resources to follow up these patients, there are still important gaps, including the lack of a specific follow-up protocol. CONCLUSIONS: Although all the participants are experts in the management of patients with MS, there is still diversity in the functions they perform, and the available resources they have in their hospitals. Nurses act as a key element in the process of identification of symptoms, training and monitoring of these patients with spasticity in EM.