Usefulness of intraoperative voiding cystourethrogram as an indicator of success in the endoscopic treatment of vesicoureteral reflux. / Utilidad de la cistouretrografía miccional intraoperatoria como indicador de éxito del tratamiento endoscópico del reflujo vesicoureteral.

OBJECTIVE: Up until now, serial voiding cystourethrogram (SVCU) has been regarded as the gold standard technique in the diagnosis of vesicoureteral reflux (VUR). The aim of intraoperative SVCU during endoscopic treatment is to detect those patients eligible to receive more biosynthetic material as a result of persistent VUR. The objective of this study was to assess the usefulness of SVCU as a predictor of treatment success. MATERIALS AND METHODS: An analytical, retrospective study of patient medical records was carried out. Patients included had undergone endoscopic VUR surgery from 2000 to 2019, and they were measured in ureteral units. VUR persistence at intraoperative SVCU following treatment was compared with SVCU results after 3 months. RESULTS: Of a total of 167 ureteral units undergoing surgery, persistent reflux immediately after surgery was observed in 17 cases (10% of the sample). Only 3 cases had other urological malformations. In the SVCU carried out after 3 months, reflux was found in 38% of the sample (64 cases). When comparing the results, intraoperative SVCU demonstrated a specificity of 92.6%, and a sensitivity of 15.6%. CONCLUSIONS: Given the low sensitivity (15.6%) of intraoperative SVCU to detect cases of persistent reflux in the mid-term, and considering the risks associated with radiation in the pediatric population - which is extremely sensitive to it -, intraoperative SVCU should be ruled out as a useful indicator of endoscopic treatment success.

OBJETIVO: La cistouretrografía miccional seriada (CUMS) ha sido hasta ahora el gold standard en el diagnóstico del reflujo vesicoureteral (RVU). La finalidad de la CUMS intraoperatoria durante el tratamiento endoscópico es detectar aquellos pacientes subsidiarios de inyectar más material biosintético por persistencia del RVU. En este estudio hemos querido evaluar la utilidad de esta prueba como predictor de éxito del tratamiento. MATERIAL Y METODOS: Estudio analítico retrospectivo mediante la revisión de historias clínicas de pacientes, medidos en unidades ureterales, intervenidos de RVU de forma endoscópica entre los años 2000 y 2019. Se comparó la persistencia de RVU en la CUMS intraoperatoria tras el tratamiento con el resultado de la CUMS a los 3 meses. RESULTADOS: De un total de 167 unidades ureterales intervenidas, se observó persistencia del reflujo inmediatamente tras la intervención en 17 casos (10% de la muestra). Solo 3 asociaban otras malformaciones urológicas. En la CUMS a los 3 meses se observó reflujo en el 38% de la muestra (64 casos). Al comparar los resultados, obtenemos para la CUMS intraoperatoria una especificidad del 92,6% y una sensibilidad del 15,6%. CONCLUSIONES: Dada la baja sensibilidad (15,6%) de la CUMS intraoperatoria para detectar los casos en los que persiste el reflujo a medio plazo y, teniendo en cuenta los riesgos asociados a la radiación que supone en una población especialmente sensible como es la pediátrica, se desestima su utilidad como indicador de éxito del tratamiento endoscópico.

Utilidad de la cistouretrografía miccional intraoperatoria como indicador de éxito del tratamiento endoscópico del reflujo vesicoureteral / Usefulness of intraoperative voiding cystourethrogram as an indicator of success in the endoscopic treatment of vesicoureteral reflux

Objetivo: La cistouretrografía miccional seriada (CUMS) ha sido hasta ahora el gold standard en el diagnóstico del reflujo vesicoureteral (RVU). La finalidad de la CUMS intraoperatoria durante el tratamientoendoscópico es detectar aquellos pacientes subsidiarios de inyectar más material biosintético por persistencia del RVU. En este estudio hemos querido evaluar la utilidad de esta prueba como predictor de éxito deltratamiento. Material y métodos: Estudio analítico retrospectivo mediante la revisión de historias clínicas de pacientes, medidos en unidades ureterales, intervenidos de RVU de forma endoscópica entre los años 2000 y2019. Se comparó la persistencia de RVU en la CUMS intraoperatoria tras el tratamiento con el resultado de la CUMS a los 3 meses. Resultados: De un total de 167 unidades ureterales intervenidas, se observó persistencia del reflujo inmediatamente tras la intervención en 17 casos (10% de la muestra). Solo 3 asociaban otras malformacionesurológicas. En la CUMS a los 3 meses se observó reflujo en el 38% de la muestra (64 casos). Al comparar los resultados, obtenemos para la CUMS intraoperatoria una especificidad del 92,6% y una sensibilidad del 15,6%. Conclusiones: Dada la baja sensibilidad (15,6%) de la CUMS intraoperatoria para detectar los casos en los que persiste el reflujo a medio plazo y, teniendo en cuenta los riesgos asociados a la radiación que supone en una población especialmente sensible como es la pediátrica, se desestima su utilidad como indicador de éxito del tratamientoendoscópico.(AU)

Objective: Up until now, serial voiding cystourethrogram (SVCU) has been regarded as the gold standard technique in the diagnosis ofvesicoureteral reflux (VUR). The aim of intraoperative SVCU during endoscopic treatment is to detect those patients eligible to receive morebiosynthetic material as a result of persistent VUR. The objective of this study was to assess the usefulness of SVCU as a predictor of treatment success. Materials and methods: An analytical, retrospective study of patient medical records was carried out. Patients included had undergoneendoscopic VUR surgery from 2000 to 2019, and they were measured in ureteral units. VUR persistence at intraoperative SVCU followingtreatment was compared with SVCU results after 3 months. Results: Of a total of 167 ureteral units undergoing surgery, persistent reflux immediately after surgery was observed in 17 cases (10%of the sample). Only 3 cases had other urological malformations. In the SVCU carried out after 3 months, reflux was found in 38% of thesample (64 cases). When comparing the results, intraoperative SVCU demonstrated a specificity of 92.6%, and a sensitivity of 15.6%. Conclusions: Given the low sensitivity (15.6%) of intraoperative SVCU to detect cases of persistent reflux in the midterm, and considering the risks associated with radiation in the pediatric population which is extremely sensitive to it, intraoperative SVCU should be ruled outas a useful indicator of endoscopic treatment success.(AU)

Efficacy comparison of intraperitoneal anaesthesia and post-operative analgesia regimens in laboratory rats.

INTRODUCTION: Effective and safe anesthesia for rodents has long been a leading concern among biomedical researchers. Intraperitoneal injection constitutes an alternative to inhalant anesthesia. PURPOSE: The aim of this study was to identify a safe, reliable, and effective anesthesia and postoperative analgesia protocol for laboratory rats exposed to painful procedures. MATERIAL AND METHODS: Twenty-seven female Wistar rats in an ongoing study that required surgery were randomized into groups for three different intraperitoneal anesthesia protocols and three different analgesia regimens. The anesthesia groups were (1) medetomidine + ketamine (MK), (2) ketamine + xylacine (KX), and (3) fentanyl + medetomidine (FM). Three analgesia groups were equally distributed among the anesthesia groups: (1) local mepivacaine + oral ibuprofen (MI), (2) oral tramadol + oral ibuprofen (TI), and (3) local tramadol + oral tramadol + + oral ibuprofen (TTI). A core was assigned to measure anesthesia (0-3) and analgesia (0-2) effectiveness; the lower the score, the more effective the treatment. RESULTS: The mean MK score was 0.44 versus 2.00 for FM and 2.33 for KX. Mean score for analgesia on the first postoperative day was TTI (4.66) TI (9.13), and MI (10.14). Mean score 48 hours after surgery was TTI (3.4), TI (6.71), and MI (9.5). These differences were statistically significant. CONCLUSION: MK was shown to be a reliable, safe, and effective method of anesthesia. The TTI analgesia regimen is strongly recommended in light of these results.

Comparación de las características corneales en gallina y codorniz como modelos experimentales de cirugía refractiva / Comparison of the characteristics in hen and quail corneas as experimental models of refractive surgery

OBJETIVO: Analizar y comparar la histología, la morfología y las medidas biofísicas corneales de la gallina y la codorniz para determinar qué modelo experimental animal es el más adecuado para la realización de estudios de investigación en cirugía corneal. MATERIAL Y MÉTODOS: Se estudiaron las medidas biofísicas de la córnea (curvatura, espesor, refracción y longitud axial) de 20 animales (10 gallinas y 10 codornices). Después las córneas fueron procesadas para el estudio de histología clásica bajo la luz del microscopio. RESULTADOS: Los 2 grupos analizados poseen una córnea similar a la del humano con respecto al número de capas y con una evidente capa de Bowman. El espesor corneal, así como la longitud axial del ojo de la gallina, 225,3 ± 18,4 μm y 12,8 ± 0,25 mm, respectivamente, fueron significativamente mayores que los de la codorniz (p < 0,01 y p < 0,001). El radio de curvatura de la córnea central de la gallina también fue significativamente mayor que el de la codorniz (p < 0,001). El poder refractivo de las 2 especies fue similar. La proporción del espesor estromal con relación a la córnea en la gallina fue más similar al humano (82,6%) que de la codorniz (72,5%). La densidad de la población de queratocitos en la gallina, 8,57 ± 1,49/5.000 μm2, correspondió a cerca de la mitad del número de queratocitos encontrados en la córnea de la codorniz (p < 0,005). CONCLUSIONES: La córnea de gallina, por su tamaño, espesor del estroma y similitud de proporción en sus capas con la córnea humana, es más adecuada para la cirugía refractiva corneal que la de codorniz

AIM: To compare the histological, morphological and the biophysical measurements between hen and quail corneas, in order to determine which of them were better suited for use as an animal model for research into corneal refractive surgery. MATERIAL AND METHODS: A study was performed using the biophysical measurements of the cornea (curvature, thickness, refraction, and axial length) of 20 animals (10 hens and 10 quails). The corneas were then prepared for histological analysis under microscopy light. RESULTS: The analysis showed that both groups have the same number of corneal layers as the human cornea and with an evident Bowman's layer. The thickness of the hen cornea and axial length of the eye, 225.3 ± 18.4 μm and 12.8 ± 0.25 mm, respectively, were larger than that of the quail (P < .01 andP < .001, respectively). The radius of curvature for the hen central cornea, 3.65 ± 0.08 mm, was greater than that for the quail (P < .001), but the refractive power of each cornea was similar. The proportion of total corneal thickness of the hen stroma, 82.6%, was more similar to that of the human than was the quail stroma, 72.5%. Within the hen stroma, the density of keratocytes, 8.57 ± 1.49 per 5,000 μm2, was about half that in the quail stroma (P < .005). CONCLUSIONS: Because of the large size of the hen cornea, the stromal thickness and proportional similarity of the corneal layers with human cornea, the hen maybe better than the quail as an alternative species suitable for use in studies of corneal refractive surgery

Comparison of the characteristics in hen and quail corneas as experimental models of refractive surgery. / Comparación de las características corneales en gallina y codorniz como modelos experimentales de cirugía refractiva.

AIM: To compare the histological, morphological and the biophysical measurements between hen and quail corneas, in order to determine which of them were better suited for use as an animal model for research into corneal refractive surgery. MATERIAL AND METHODS: A study was performed using the biophysical measurements of the cornea (curvature, thickness, refraction, and axial length) of 20 animals (10 hens and 10 quails). The corneas were then prepared for histological analysis under microscopy light. RESULTS: The analysis showed that both groups have the same number of corneal layers as the human cornea and with an evident Bowman's layer. The thickness of the hen cornea and axial length of the eye, 225.3±18.4µm and 12.8±0.25mm, respectively, were larger than that of the quail (P<.01 and P<.001, respectively). The radius of curvature for the hen central cornea, 3.65±0.08mm, was greater than that for the quail (P<.001), but the refractive power of each cornea was similar. The proportion of total corneal thickness of the hen stroma, 82.6%, was more similar to that of the human than was the quail stroma, 72.5%. Within the hen stroma, the density of keratocytes, 8.57±1.49 per 5,000µm(2), was about half that in the quail stroma (P<.005). CONCLUSIONS: Because of the large size of the hen cornea, the stromal thickness and proportional similarity of the corneal layers with human cornea, the hen maybe better than the quail as an alternative species suitable for use in studies of corneal refractive surgery.

Probing non polar interstellar molecules through their protonated form: Detection of protonated cyanogen (NCCNH+).

Cyanogen (NCCN) is the simplest member of the series of dicyanopolyynes. It has been hypothesized that this family of molecules can be important constituents of interstellar and circumstellar media, although the lack of a permanent electric dipole moment prevents its detection through radioastronomical techniques. Here we present the first solid evidence of the presence of cyanogen in interstellar clouds through the detection of its protonated form toward the cold dark clouds TMC-1 and L483. Protonated cyanogen (NCCNH+) has been identified through the J = 5 - 4 and J = 10 - 9 rotational transitions using the 40m radiotelescope of Yebes and the IRAM 30m telescope. We derive beam averaged column densities for NCCNH+ of (8.6 ± 4.4) × 1010 cm-2 in TMC-1 and (3.9 ± 1.8) × 1010 cm-2 in L483, which translate to fairly low fractional abundances relative to H2, in the range (1-10) × 10-12. The chemistry of protonated molecules in dark clouds is discussed, and it is found that, in general terms, the abundance ratio between the protonated and non protonated forms of a molecule increases with increasing proton affinity. Our chemical model predicts an abundance ratio NCCNH+/NCCN of ~ 10-4, which implies that the abundance of cyanogen in dark clouds could be as high as (1-10) × 10-8 relative to H2, i.e., comparable to that of other abundant nitriles such as HCN, HNC, and HC3N.

Induction of thrombosis of the abdominal aneurysm sac through the application of radiofrequency. An experimental study.

UNLABELLED: This is an experimental study of endovascular aortic surgery for evaluation of the effect of thrombosis induced in the aneurysmal sac using a radiofrequency method. PURPOSE: To determine the efficacy of the induction of thrombosis of the abdominal aneurysm sac as a prevention of endoleaks after endovascular treatment. MATERIALS AND METHODS: Six dogs underwent radiofrequency blood clotting of the aneurysm sac and where afterwards treated with stent-grafting. A comparison with a historical group of 4 dogs with an abdominal aneurysm treated with stent-grafting was used. Radiofrequency was applied to each sac for 1 minute at 127 mA ± 33 (mean ± SD) (tip temperature, 92°C ± 2). IVUS ultrasonography and histology studies were used for the evaluation of the method. RESULTS: The results show the efficacy of the radiofrequency method and its possible future inclusion as a standard clinical application. DISCUSSION AND CONCLUSIONS: Endovascular repair of abdominal aortic aneurysms is dependent on the complete exclusion of the aneurysm from the arterial circulation. Later growth of the aneurysm is originated from retrograde flow into the sac. This study demonstrates how the use of radiofrequency induced thrombosis in a canine model of aneurysm sac. Ultrasound IVUS enabled further control for assessment of blood coagulation after radiofrequency treatment. This approach may be considered a tool for future prevention of endoleaks, in clinical practice.

Prevention of the endoleaks after evar with the induction of the trombosis of the aneurysn sac with radiofrequency

SUMMARY: This was an experimental study of endovascular aortic surgery for endovascular evaluation of the effect of thrombosis producedfor coagulation of the blood of the aneurysm sac with radiofrequency method. PURPOSE. To determine the efficacy of the induction to thrombosis of the aneurysm sac as prevention of endoleaks after endovascular treatment. MATERIALS AND METHODS. Six dogs with induction for radiofrequency clotting blood sac of performed aneurysm and treated with stent-graft was used in the experiments in comparison with historical group of 4 dogs only with abdominal aneurysm treated with stent-graft. Radio frequency was applied to each nodule for 1 minutes at 127 mA ± 33 (mean ± SD) (tip temperature, 92°C ± 2). Color Dupplex ultrasonography and histology study are used for the evaluation of the method. RESULTS. The results show the efficacy of the radiofrequency system and it is possible the discussion of the standard clinical application DISCUSSION AND CONCLUSIONS. Endovascular repair of abdominal aortic aneurysms is dependent on the successful exclusion of the aneurysm from arterial circulation. Type II endoleaks originate from retrograde flow into the aneurysm sac. This study demonstrates the use of radiofrequency induce thrombosis in a canine model of a type II endoleak. A Ultrasound Dupplex enabled the immediate and a month detection of coagulation blood after radio-frequency treatment in dog aneurysm sac. This approach may be a strategy for future prevention of endoleaks (AU)

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Necrotizing pancreatitis: a surgical approach independent of documented infection.

BACKGROUND: Strategies for the management of patients with necrotizing pancreatitis remain controversial. While consensus opinion supports operative necrosectomy for the treatment of infected pancreatic necrosis, the timing for surgical intervention is not completely resolved. Further, the indication for the surgical management of sterile pancreatic necrosis is also subject to debate. METHODS: The objective of this study was to evaluate outcome measures for the surgical management of necrotizing pancreatitis, independent of documented infection. A retrospective review was undertaken between 1994 and 2002 at a single county hospital. RESULTS: Twenty-one patients with CT-documented necrotizing pancreatitis underwent operative pancreatic necrosectomy with laparostomy within 21 days of initial diagnosis and had an average of three reoperations. Average length of stay (LOS) in the ICU was 36 days and in the hospital 67 days. Ten patients had documented infected necrosis based on initial intra-operative cultures, while I I had sterile necrosis. Overall, 95% (20/21) of the patients had a complication, with an average of three complications per patient. Common complications included ARDS (71%), sepsis (33%), renal failure (24%), and pneumonia (24%). The overall mortality rate was 14% (3/21), with a mean follow-up of 469 days. DISCUSSION: The surgical management of acute necrotizing pancreatitis, independent of documented infection, can be undertaken within 3 weeks of diagnosis with an acceptable morbidity and a low mortality rate. Creation of a laparostomy to enable ready, atraumatic debridement of the retroperitoneum is a safe alternative to standard repeat laparotomies and thus represents a useful adjunct to the surgical management of necrotizing pancreatitis.

Estudio comparativo del diagrama de interacción de columnas rectangulares de concreto armado confinadas y no confinadas

En este trabajo se presentan las expresiones generales para el cálculo del diagrama de interacción de columnas rectangualares de concreto armado confinadas y no confinadas. Se hace un estudio de 57 columnas correspondientes a un sector del hospital Universitario de la ciudad de Mérida, tomando en cuenta el acero transversal existente y el acero transversal que debería tener de acuerdo con las recomendaciones de la Norma ACI_89. Se concluye que en la zona de falla por tracción la resistencia es similar para secciones de concreto confinado y no confinado; en cambio, en la zona de falla por comprensión se observa una ganancia de un 20

en la resistencia del concreto confinado con respecto al no confinado (AU)

Estudio del factor de ductibilidad de desplazamiento en pórticos de concreto armado. Aplicaciones al Hospital Universitario de Los Andes (HULA)

Se presenta el cálculo del factor de ductibilidad de un desplazamiento de póticos de concreto armado ante ductibilidad de dezplazamiento y de curvatura para obtener relaciones entre ambos. Se analizan 29 pórticos del Hospital Universitario de los Andes. Se encuentra una expresión que permite correlacionar ambos factores (AU)

[Breast feeding: causes for its discontinuation in 2 cities in Ecuador]. / Lactancia materna: causas de suspensión en dos ciudades de Ecuador.

PIP: The results of a study carried out in a sample of mothers from 2 cities of the province of Manabi, Ecuador in August 1979 are presented in this paper. A total of 962 mothers were surveyed, 507 in Portoviejo, capital of the province, and 455 in Chone. The purpose of the study was to gather information on breastfeeding practices with the oldest child born 3 years prior to the initiation of the study and who was not being breastfed any longer. Breastfeeding was found to be widespread (88.8% in Portoviejo and 77.5% in Chone). The mothers ages 20-34 nursed their babies longer than 6 months. Most of the mothers were housewives and they tended to breastfeed their children for longer periods. This was also the case among the women with less schooling and in the lowest income brackets. The most common reasons for suspension of breastfeeding were: absence or insufficient milk; pregnancy; adverse effects of milk upon the infant or its rejection; and growth factors in the child. In these cases, the mother substituted powdered or fresh cow's milk or used them as a supplement before suspending nursing. Among other causes, physicians were apparently responsible for the introduction of substitute feeding practices. Therefore, it is recommended that health education programs be implemented for families at different socioeconomic levels in order to highlight the value of mother's milk for the infant and so that physicians will understand and advocate the benefits of breastfeeding. (author's)^ieng