Pesquisa | SciELO

Abstract Introduction: In Mexico, cardiac rehabilitation (CR) as an interdisciplinary intervention with therapeutic impact in patients with heart disease is growing. There is the need to know actual conditions of CR in our country. Objectives: The objective of this National Registry is to follow-up those existing and new CR units in Mexico through the comparison between the two previous registries, RENAPREC-2009 and RENAPREC II-2015 studies. This is a descriptive study focused on diverse CR activities such as assistance training, and certification of health professionals, barriers, reference, population attended, interdisciplinarity, permanence over time, growth prospects, regulations, post-pandemic condition, integrative characteristics, and scientific research. Results: Data were collected from 45 CR centers in the 32 states, 75.5% are private practice units, 67% are new, 33% were part of RENAPREC II-2015, and 17 have continued since 2009. With a better distribution of CR units along the territory, the median reference of candidates for CR programs is 9% with a significant reduction into tiempo of enrollment to Phase II admission (19 ± 11 days). Regarding to previous registries, the coverance of Phases I, II, and III is 71%, 100%, and 93%, respectively; and a coverance increases in evaluation, risk stratification, and prescription, more comprehensive attendance and prevention strategies. Conclusions: CR in Mexico has grown in the past 7 years. Even there is still low reference and heterogeneity in specific processes, there are strengths such as interdisciplinarity, scientific professionalization of specialists, national diversification, and an official society that are consolidated over time.

https://doi.org/10.24875/acm.22000235

Incumplimiento en el contenido nutricional de alimentos importados para mascotas en Costa Rica
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Cedeño-López, André

; WingChing-Jones, Rodolfo

Agronomía Mesoamericana

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Dez 2023, Volume 34 Nº 3 elocation 52544

Resumo: Es En | Texto: Es En | PDF: Es | PDF: En

Resumen Introducción. La normativa que regula los alimentos balanceados asegura el bienestar de las mascotas, la salud pública y la seguridad al consumidor, por lo que es valioso corroborar el contenido de los nutrimentos declarados en las etiquetas. Objetivo. Determinar el cumplimiento del análisis de garantía de 34 alimentos importados para perros, gatos, hámsters, conejos, peces ornamentales y tortugas, y comparar los resultados con las recomendaciones nutricionales encontradas en la literatura. Materiales y métodos. Durante los meses de agosto y diciembre del año 2018, se obtuvieron muestras de alimento de perros (10), gatos (10), peces ornamentales (5), tortugas (4), hámster (3) y conejos (2); mediante compra directa en diferentes puntos de venta en San José, Costa Rica. Se analizó el contenido de humedad, proteína cruda (PC), extracto etéreo (EE), fibra cruda (FC), calcio, fósforo, sal y carbohidratos. Se calculó el contenido promedio, la desviación estándar, el valor máximo y mínimo de cada nutrimento en cada grupo de alimento, según la especie animal. Los valores individuales y promedios obtenidos se compararon con los valores declarados en la etiqueta y las recomendaciones nutricionales encontradas en la literatura. Resultados. Los nutrimentos que presentaron incumplimientos fueron: sal (27), calcio (16) y energía (14). Además, se encontró que alimentos no declaraban el contenido de sal (14), calcio (9) y fósforo (7). Con respecto a los requerimientos mínimos nutricionales, veintidós alimentos presentaron deficiencias o excesos en al menos un nutrimento (carbohidratos (11) y extracto etéreo (7)). Conclusiones. Los alimentos balanceados importados para perros, gatos, conejos, hámster, tortugas y peces ornamentales presentaron incumplimientos en los contenidos de PC, EE, FC, EM, Ca, P y sal garantizados en la etiqueta. La composición nutricional de los alimentos evaluados limita el cumplimiento de requerimientos nutricionales de los animales, excepto para conejos que sí se cumple con los requerimientos.

Abstract Introduction. The regulations that govern balanced pet food ensure the welfare of pets, public health, and consumer safety, making it valuable to verify the nutritional content declared on labels. Objective. To determine the compliance of the guaranteed analysis of 34 imported foods for dogs, cats, hamsters, rabbits, ornamental fish, and turtles and compare the results with the nutritional recommendations found in the literature. Materials and methods. During the months of August and December of 2018, food samples of dog (10), cat (10), ornamental fish (5), turtles (4), hamster (3), and rabbits (2) food were obtained by direct purchase at different points of sale in San José, Costa Rica. The content of moisture, crude protein (CP), ether extract (EE), crude fiber (CF), calcium, phosphorus, salt, and carbohydrates were analyzed. The average content, standard deviation, maximum and minimum value of each nutrient in each group of food were calculated according to the animal species. The individual and average values obtained were compared with the values declared on the label and the nutritional recommendations found in the literature. Results. The nutrients that presented non-compliances were: salt (27), calcium (16), and energy (14). Additionally, it was found that some foods did not declare the content of salt (14), calcium (9), and phosphorus (7). With respect to the minimum nutritional requirements, twenty-two samples presented deficiencies or excesses in at least one nutriment (carbohydrates (11) and ether extract (7)). Conclusions. Imported balanced foods for dogs, cats, rabbits, hamsters, turtles, and ornamental fish presented non-compliances in the guaranteed content of CP, EE, CF, ME, Ca, P, and salt declared on the label. The nutritional composition of the evaluated foods limits compliance with the nutritional requirements of the animals, except for rabbits that do comply with the requirements.

https://doi.org/10.15517/am.2023.52544

Arteria coronaria única y válvula aórtica cuadricúspide en un paciente con infarto agudo de miocardio sin elevación del segmento ST
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Borges-López, Jesús S.

; García-García, Juan F.

; Bazo-Medina, Jessica M.

; Díaz-Rojas, María F.

; Ayala-Hernández, Eduardo

; Castaño-Guerra, Rodolfo de J.

Archivos de cardiología de México

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Set 2023, Volume 93 Nº 3 Páginas 372 - 375

Resumo: Es | Texto: Es | PDF: Es

https://doi.org/10.24875/acm.22000149

First heart transplant at the General Hospital of Mexico "Dr. Eduardo Liceaga"
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Castaño-Guerra, Rodolfo de J.

; Borges-López, Jesús S.

; Ramírez-Castañeda, Serafín

; Ayala-Hernández, Eduardo

; Barón-Caballero, José L.

; Guerrero-Avendaño, Guadalupe M. L.

Revista médica del Hospital General de México

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Set 2023, Volume 86 Nº 3 Páginas 115 - 120

Resumo: En | Texto: En | PDF: En

Abstract Nowadays, cardiac transplant is considered the most efficient treatment to better the prognosis in patients with last stage cardiac insufficiency that is impossible to obtain through regular medical and/or surgical treatments. We report the case of the first cardiac transplant performed at the General Hospital of Mexico "Dr. Eduardo Liceaga," we describe the patient's and donor's characteristics, pre- and post-surgical management, immunosuppressive therapy, cardiac rehabilitation, and patient follow-up. As well as the multidisciplinary approach necessary to achieve a successful result.

https://doi.org/10.24875/hgmx.22000069

Alternative methods of skull reconstruction for giant sarcomas
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Araujo-López, Adán

; Gónzalez-Rodríguez, Mónica

; Cruz-Hernández, Álvaro

; Nuñéz-Castillo, Joseph A.

; Tristán-Tenorio, Carlo Augusto

; Ríos-Lara, Rodolfo L.

; Ugalde-Vitelly, Juan A.

Revista médica del Hospital General de México

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Mar 2023, Volume 86 Nº 1 Páginas 23 - 29

Resumo: En | Texto: En | PDF: En

Abstract Soft tissue sarcomas are malignant tumors derived from the mesoderm, the most frequent age of presentation is between the 5th and 7th decade of life, mostly in males, more frequent location in the extremities, leaving only 1% of presentation in skin hairy, and this is a new concept of treating big sarcomas. We present the case of a 45-year-old male with a diagnosis of soft tissue sarcoma on the frontal, parietal, and right occipital surface of approximately 35x28x25 cm, without involvement of adjacent organs, without adjuvant therapy. Performing an oncological resection, exposing the periosteum, performing fenetrations of the external table, covering the Dermal Matrix – Integra®, using a new concept to treat this large defects, after 3 weeks with complete neodermis, we cover it with a Partial Thickness Graft, achieving 100% integration. and proper follow-up. Sarcomas are an uncommon and heterogeneous group of neoplasms of mesenchymal origin. Standard use of Integra reconstruction requires two stages: Integra forms a neo dermis through ingrowth of host vessels, followed by application of a thin split-thickness skin graft at a later date <30 days, using this new concepts of treating large defects with no flap. Sarcomas are highly aggressive and have very varied symptoms depending on the tumor stage at the time of diagnosis. Timely and improved a new concept of treatment such as an Integra® dermal regenerator, not using a flap, shows adequate integration in the patient and survival.

https://doi.org/10.24875/hgmx.22000011

Efecto del compuesto N-2,6-dicloro-aralquil-2-Aminoindano en la conducta estereotipada de ratas. Acción dopaminérgica selectiva central sobre los ganglios basales más que en las estructuras límbicas.
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Velásquez, Marienmy del V.

; Albarracín, Alexander E.

; Boscán, Kelvin

; Ángel, Ligia B.

; Izquierdo, Rodolfo E.

; Ramírez, María M.

; Migliore, Biagina del C.

; Charris, Jaime E.

; Garrido, María del R.

; Israel, Anita

; López, Simón E.

; Ángel, Jorge E.

Investigación Clínica

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Mar 2023, Volume 64 Nº 1 Páginas 15 - 27

Resumo: En Es | Texto: En Es | PDF: En | PDF: Es

Abstract Dopamine 1 is involved in neurodegenerative disorders affecting the central nervous system (CNS), such as Parkinson’s disease. Despite the absence of some available drugs capable of preventing, stopping or curing the progression of such diseases, there are numerous compounds designed, synthesized, and pharmacologically tested which give rise to pharmacophoric generalizations about the dopaminergic receptor required for the search of a drug able to improve or cure those pathologies. N-aralkyl-2-aminoindane derivatives have shown selective activity in the central dopaminergic system. Both the N-[(2,4-dichlorophenyl)-1-methyl-ethyl]-2-aminoindane hydrochloride 2 and N-[(3,4-dichlorophenyl)-1-methyl-ethyl]-2-aminoindane hydrochloride 3 showed an agonistic activity mediated by central dopaminergic mechanisms. To contribute to the search of new drugs able to re-establish homeostasis in the dopaminergic transmission in Parkinson’s disease, the compound N-2,6- dichloro-aralkyl-2-aminoindane 4 was designed through medicinal chemistry strategies that contain pharmacophoric approximations of prodrugs. The pharmacological evaluation of compound 4 in the stereotyped behavior of male Sprague Dawley rats showed agonistic activity through the activation of central dopaminergic mechanisms and a higher selectivity in the responses of stereo- typed behavior characteristic of the basal ganglia over the typical responses from limbic structures.

Resumen La dopamina 1, está implicada en trastornos neurodegenerativos que afectan al sistema nervioso central (SNC) tales como la enfermedad de Parkinson, entre otros. Aunque no se dispone aún de ningún fármaco capaz de prevenir, detener o curar la progresión de estas enfermedades, son numerosos los compuestos que han sido diseñados, sintetizados y evaluados farmacológicamente, que han aportado las generalizaciones farmacofóricas del receptor dopaminérgico, necesarias para la búsqueda de un fármaco capaz de mejorar o curar estas patologías. Los derivados 2-aminoindano-N-aralquílicos han mostrado tener actividad selectiva en el sistema dopaminérgico central, de modo tal que los compuestos clorhidratos de N-[(2,4-diclorofenil)-1-metil- etil]-2-aminoindano 2 y N-[(3,4-diclorofenil)-1-metil-etil]-2-aminoindano 3 demostraron tener actividad agonística mediada por mecanismos dopaminérgicos centrales. Con el propósito de contribuir en la búsqueda de nuevos fármacos que permitan restablecer la homeostasis de la transmisión dopaminérgica en la enfermedad de Parkinson, el compuesto N-2,6-dicloro-aralquil-2-aminoindano 4 fue diseñado a través de estrategias de la química medicinal, que contienen las aproximaciones farmacofóricas de los profármacos. La evaluación farmacológica del compuesto 4, en la conducta estereotipada en ratas macho de la cepa Sprague Dawley, demostró tener actividad agonística a través de la activación de los mecanismos dopaminérgicos centrales y mostró mayor selectividad en las respuestas de conductas estereotipadas propias de los ganglios basales sobre las respuestas conductuales propias de las estructuras límbicas.

https://doi.org/10.54817/ic.v64n1a02

Breve comentario sobre el origen de la toracotomía anterolateral para el tratamiento quirúrgico de las heridas cardíacas
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López-De la Cruz, Yoandy

; Morales-Valdés, Rodolfo

Cirugía y cirujanos

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Fev 2023, Volume 91 Nº 1 Páginas 143 - 144

Resumo: Es | Texto: Es | PDF: Es

https://doi.org/10.24875/ciru.21000540

Automated coding and selection of causes of death in Peru: a descriptive study, 2016-2019
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Vargas-Herrera, Javier

; Miki, Janet

; Wong, Liliana López

; Monzón, Jorge Miranda

; Villanueva, Rodolfo

Epidemiologia e Serviços de Saúde

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2023, Volume 32 Nº 3 elocation e2023024

Resumo: Pt Es En | Texto: Pt Es En | PDF: Pt | PDF: Es | PDF: En

Resumo Objetivo: descrever o desempenho de um software na seleção automática da causa básica de morte no Peru, entre 2016 e 2019. Métodos: estudo descritivo do desempenho de um software na seleção automatizada da causa básica de morte ao longo dos anos (teste qui-quadrado de tendência) e da correlação entre a forma de declaração de óbito e o desempenho do software (coeficientes de correlação e determinação). Resultados: foram analisadas 446.217 declarações de óbito; a proporção de declarações com causa básica de morte aumentou de 69,6%, em 2016, para 78,8%, em 2019 (p-valor < 0,001); observou-se correlação linear direta entre as declarações eletrônicas de óbito e o desempenho do software (coeficiente de correlação = 0,95; R2 = 0,89). Conclusão: o software apresentou bom desempenho na seleção automática da causa básica de morte, com aumento significativo entre 2016 e 2019.

Resumen Objetivo: describir el desempeño de un software en la selección automática de la causa básica de muerte en Perú, entre 2016 y 2019. Métodos: estudio descriptivo de la tendencia del desempeño de un software para seleccionar la causa básica de muerte a través de los años (chi cuadrado de tendencia) y la correlación entre los certificados de defunción electrónicos y el desempeño del software (coeficientes de correlación y determinación). Resultados: se analizaron 446.217 certificados; la proporción de certificados con causa básica de muerte aumentó de 69,6% en 2016 a 78,8% en 2019 (p-valor < 0,001); se observó una correlación lineal directa entre certificados electrónicos y el desempeño del software (coeficiente de correlación = 0,95; R2 = 0,89). Conclusión: el software presentó un buen desempeño en la selección de la causa básica de muerte y aumentó significativamente entre 2016 y 2019.

Abstract Objective: to describe software performance in the automatic selection of the underlying cause of death in Peru, between 2016 and 2019. Methods: this was a descriptive study on the software performance in the automated selection of the underlying cause of death over the years (chi-square test for trend) and the correlation between the type of death certificate and software performance (correlation coefficient and coefficient of determination). Results: a total of 446,217 death certificates were analyzed; the proportion of death certificates with the underlying cause of death increased from 69.6% in 2016 to 78.8% in 2019 (p-value < 0.001); it could be seen a direct linear correlation between electronic death certificates and software performance (correlation coefficient = 0.95; R2 = 0.89). Conclusion: the software showed good performance in the automatic selection of the underlying cause of death, with a significant increase between 2016 and 2019.

https://doi.org/10.1590/s2237-96222023000300005.en

Automated coding and selection of causes of death in Peru: a descriptive study, 2016-2019
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Vargas-Herrera, Javier

; Miki, Janet

; Wong, Liliana López

; Monzón, Jorge Miranda

; Villanueva, Rodolfo

Epidemiologia e Serviços de Saúde

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2023, Volume 32 Nº 3 elocation e2023024

Resumo: En Es Pt | Texto: En Es Pt | PDF: En | PDF: Es | PDF: Pt

https://doi.org/10.1590/s2237-96222023000300005.en

10.

Governance of public contracts: the materialization of efficiency and planning principles in law 14,133/2021
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Valle, Vivian Cristina Lima López

; Transmontano, João Pedro Teixeira

; Gómez, Rodolfo Cancino

Sequência (Florianópolis)

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2023, Volume 44 Nº 94 elocation e96943

Resumo: En Pt | Texto: En Pt | PDF: En | PDF: Pt

Abstract This article seeks to elucidate the Governance of public contracts provided for in article 11, sole paragraph, of Law 14,133/2021, as the formalization of the efficiency and planning principles. Thus, it presents the historical search for professionalization, planning and efficiency in the Brazilian Public Administration, from the bureaucratic reform until the advent of the law 14,133/2021, with emphasis on the management reform from the 1990s. Afterwards, the subsequent approximation of private management mechanisms to public management is presented, with emphasis on corporate Governance, which, based on the agency theories, resulted in the concept of the organizational public Governance, based on the notions of leadership, strategy and control, widely present in the 2021 law through various instruments. The methodology used was that of bibliographic research.

Resumo Este artigo busca elucidar a governança dos contratos públicos prevista no artigo 11, parágrafo único, da Lei nº 14.133/2021, como a formalização dos princípios da eficiência e do planejamento. Assim, apresenta a busca histórica pela profissionalização, planejamento e eficiência na Administração Pública brasileira, desde a reforma burocrática até o advento da Lei nº 14.133/2021, com ênfase na reforma gerencial a partir da década de 1990. Posteriormente, apresenta-se a posterior aproximação dos mecanismos de gestão privada à gestão pública, com destaque para a governança corporativa, que, com base nas teorias de agência, resultou no conceito de governança pública organizacional, fundamentado nas noções de liderança, estratégia e controle, amplamente presentes na lei de 2021 por meio de diversos instrumentos. A metodologia utilizada foi a de pesquisa bibliográfica.

https://doi.org/10.5007/2177-7055.2023.e96943

11.

Suspensión alta al ligamento uterosacro con suturas permanentes en el prolapso apical: seguimiento a 24 meses
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López-Orellana, Rodolfo E.

; Kaplan-Delmar, Francisco J.

; Yuivar-Santana, Andrés I.

; Hevia-Grez, Tiare A.

Revista chilena de obstetricia y ginecología

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Dez 2022, Volume 87 Nº 6 Páginas 375 - 380

Resumo: En Es | Texto: En Es | PDF: En | PDF: Es

Abstract Introduction: Pelvic organ prolapse (POP) is a frequent pathology that affects up to 60% of women. Transvaginal uterosacral ligament high fixation (USLs: utero-sacral ligaments) is an alternative for the treatment of apical prolapse with good results, limited operative and recovery times, as well as low rates of complications. Objective: To evaluate the anatomical and subjective success rate in patients with an apical prolapse undergoing STALUS at the Quilpué Hospital at 24 months of follow-up. Materials and method: A descriptive observational retrospective study was carried out, selecting all symptomatic patients with an apical prolapse ≥ 2 of the POP Q classification, submitted to a FAUS between September 2014 and October 2019. The data were obtained from the database of the Urogynecology Unit of the Quilpué Hospital, prior approval of the ethics committee. Objective success was defined as a C-point 1 centimeter above the hymen and subjective success with better or much better Patient Global Impression-Improvement (PGI-I) scale and/or a greater than 80% Visual Analogue Scale (VAS), at 24 months of follow-up. Results: 46 patients were included. The objective success rate was 84% and the subjective success rate was 70%. Conclusions: The transvaginal FAUS with permanent sutures is an excellent alternative for the treatment of apical prolapse with a success rate similar to the gold standard at 24 months of follow-up.

Resumen Introducción: El prolapso de órganos pélvico (POP) es una patología frecuente que afecta hasta el 60% de las mujeres. La fijación alta al ligamento uterosacro (FAUS) transvaginal es una alternativa para el tratamiento del prolapso apical con buenos resultados, tiempos operatorios y de recuperación acotados, además de bajas tasas de complicaciones. Objetivo: Evaluar la tasa de éxito anatómico y subjetivo en pacientes portadoras de un prolapso apical sometidas a FAUS en el Hospital de Quilpué a 24 meses de seguimiento. Materiales y método: Se realizó un estudio retrospectivo observacional descriptivo, seleccionando a todas las pacientes sintomáticas con un prolapso apical ≥ 2 de la clasificación de POP-Q, sometidas a una FAUS entre septiembre de 2014 y octubre de 2019. Los datos fueron obtenidos desde la base de datos de la unidad de uroginecología del Hospital de Quilpué, previa aprobación del comité de ética. El éxito objetivo se definió como un punto C a 1 centímetro sobre el himen y el éxito subjetivo con una escala de impresión de mejora global del paciente (PGI-I) mejor o mucho mejor y/o una escala visual analógica (EVA) mayor al 80%, a 24 meses de seguimiento. Resultados: Se incluyeron 46 pacientes. La tasa de éxito objetivo fue del 84% y de éxito subjetivo del 70%. Conclusiones: La FAUS transvaginal con suturas permanentes es una excelente alternativa para el tratamiento del prolapso apical con una tasa de éxito similar al gold standard a 24 meses de seguimiento.

https://doi.org/10.24875/rechog.22000005

12.

Coartación aórtica: una causa infradiagnosticada de hipertensión arterial secundaria
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Borges-López, Jesús S.

; Castaño-Guerra, Rodolfo de J.

; Ayala-Hernández, Eduardo

; Rosas-Munive, Emma

; Barón-Caballero, José L.

; Borges-López, Luis M.

Revista mexicana de medicina familiar

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Dez 2022, Volume 9 Nº 4 Páginas 116 - 121

Resumo: Es En | Texto: Es En | PDF: Es | PDF: En

RESUMEN La coartación aórtica representa el 5-8% de todas las cardiopatías congénitas y se define como un estrechamiento de la luz aórtica a nivel del ligamento arterioso o debajo de este, clasificándose en preductal o posductal, y existen varias teorías que tratan de explicar su etiología, que aún sigue siendo poco clara. Puede diagnosticarse desde la infancia o en la edad adulta, debe sospecharse en todo paciente antes de los 30 años de edad que presente hipertensión arterial sistémica para poder brindar un tratamiento quirúrgico oportuno.

ABSTRACT Aortic coarctation represents 5-8% of all congenital heart diseases and is defined as a narrowing of the aortic lumen at or below the ligamentum arteriosum, classified as preductal or postductal, and there are several theories that try to explain its etiology, which is still unclear. It can be diagnosed from childhood or in adulthood, and every patient before 30 years old, should be suspected of having systemic arterial hypertension, in order to provide timely surgical treatment.

https://doi.org/10.24875/rmf.22000011

13.

Reconstructive management of total lower lip defects with a modified gate flap at the “Dr. Eduardo Liceaga” General Hospital of Mexico
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Ortíz-Martínez, Héctor

; Ríos-Lara y López, Rodolfo L.

Revista médica del Hospital General de México

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Dez 2022, Volume 85 Nº 4 Páginas 153 - 158

Resumo: En | Texto: En | PDF: En

Abstract Objective: A surgical proposal is presented for the management of total lower lip defects based on the technique described in 1980 by Fujimori, called gate flap. The most common cause of total lip defects is oncological resections; likewise, epidermoid cancer represents more than 90% of the types of cancer in the lip. Reconstructive management after excisional treatment requires extensive anatomical knowledge of the area, and free flaps are currently the gold standard for total lower lip defects. It is for this reason that after a review of the surgical options described, we made modifications to the Fujimori gate flap. Materials and Methods: The gate flap modified by us consists in a unilateral musculocutaneous flap, generating less donor site morbidity, and adding a palmaris longus tendon graft, performing a double pulley system for reconstruction of the oral sphincter, achieving adequate fluid continence. Three cases of elderly patients with total defects of the lower lip are presented. Results: We found that Modified Gate Flap are superior to the gold standard (radial free flap). Achieving adequate skin coverage, restoration of the oral sphincter, shorter surgical time, they do not present complications associated with the procedure. Conclusions: The ideal reconstruction should have not only an adequate aesthetic appearance, but also the restoration of function, associated with the lowest incidence of complications, with reproducible and constant results, which lead to a high degree of satisfaction of the patient and the surgical team; Same scenario we found with our therapeutic option.

https://doi.org/10.24875/hgmx.22000043

14.

Percutaneous balloon valvuloplasty in a pregnant patient with pulmonary bioprosthetic valve stenosis
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Borges-López, Jesús S.

; Cuevas-Campillo, Axel

; Ochoa-Pérez, Víctor

; González-Maciel, Javier

; Castaño-Guerra, Rodolfo de J.

; Ayala-Hernández, Eduardo

Revista médica del Hospital General de México

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Dez 2022, Volume 85 Nº 4 Páginas 185 - 189

Resumo: En | Texto: En | PDF: En

Abstract The pulmonary valve’s anomalies can lead to the obstruction of the right ventricle’s outflow tract. This leads to the right ventricle’s pressure overload, dilation, hypertrophy and eventually his malfunction. Balloon angioplasty or valve replacement surgery is indicated in cases of severe pulmonary stenosis. Often, the insertion of bioprosthetic pulmonary valves is required; however, after several years these patients often require a second surgery due to the valve’s malcfunction. We report the case of a pregnant patient with a bioprosthetic pulmonary valve who required a ballon angioplasty due to this valve’s stenosis.

https://doi.org/10.24875/hgmx.22000022

15.

Clasificación de uso del suelo y vegetación con redes neuronales convolucionales
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Montiel González, Rodolfo

; Bolaños González, Martín Alejandro

; Macedo Cruz, Antonia

; Rodríguez González, Agustín

; López Pérez, Adolfo

Revista mexicana de ciencias forestales

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Dez 2022, Volume 13 Nº 74 Páginas 97 - 119

Resumo: En Es | Texto: En Es | PDF: En | PDF: Es

Abstract The classification of land use and vegetation is a complex exercise difficult to perform with traditional methods, thus deep learning models constitute a viable alternative because they are highly capable of learning this complex semantics, a trait which allows their application in the automatic identification of land use and vegetation, based on spatiotemporal patterns derived from their appearance. The objective of this study was to propose and evaluate a deep learning convolutional neural network model for the classification of 22 different land covers and land use classes located in the Atoyac-Salado basin. The proposed model was trained using digital data captured in 2021 by the Sentinel-2 satellite; a different combination of hyperparameters was applied in which the accuracy of the model depends on the optimizer, the activation function, the filter size, the learning rate and the batch size. The results provided an accuracy of 84.57 % for the data set. A regularization method called Dropout was used to reduce overadjustment, with great effectiveness. It was proven with sufficient accuracy that deep learning with convolutional neural networks identifies patterns in the reflectance data captured by Sentinel-2 satellite images for land use and vegetation classification in intrinsically difficult areas of the Atoyac-Salado basin.

Resumen La clasificación de uso del suelo y vegetación es un ejercicio complejo y difícil de realizar con métodos tradicionales, por lo que los modelos de aprendizaje profundo son una alternativa para su aplicación debido a que son altamente capaces de aprender esta semántica compleja, lo que hace plausible su aplicación en la identificación automática de usos del suelo y vegetación a partir de patrones espacio-temporales extraídos de su apariencia. El objetivo del presente estudio fue proponer y evaluar un modelo de red neuronal convolucional de aprendizaje profundo para la clasificación de 22 clases distintas de cobertura y uso del suelo ubicadas en la cuenca río Atoyac-Salado. El modelo propuesto se entrenó utilizando datos digitales capturados en 2021 por el satélite Sentinel-2; se aplicó una combinación diferente de hiperparámetros en la cual la precisión del modelo depende del optimizador, la función de activación, el tamaño del filtro, la tasa de aprendizaje y el tamaño del lote. Los resultados proporcionaron una precisión de 84.57 % para el conjunto de datos. Para reducir el sobreajuste se empleó el método de regularización denominado Dropout, que resultó ser muy eficaz. Se comprobó con suficiente precisión que el aprendizaje profundo con redes neuronales convolucionales identifica patrones en los datos de la reflectancia captada por las imágenes del satélite Sentinel-2 para la clasificación el uso de suelo y vegetación en áreas con una dificultad intrínseca en la cuenca del río Atoyac-Salado.

https://doi.org/10.29298/rmcf.v13i74.1269

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