Open revascularization for chronic mesenteric ischemia in the endovascular era: a quaternary-center experience and management algorithm / Revascularização aberta na isquemia mesentérica crônica durante a era endovascular: experiência de um centro quaternário e um algoritmo de tratamento

Abstract Background Chronic mesenteric ischemia (CMI) is a debilitating disease with a heavy burden on quality of life. Stenting of the superior mesenteric artery (SMA) is the first option for treatment, but there is a lack of consensus defining precise indications for open revascularization (OR). Objectives To describe a series of 4 patients with CMI treated with OR and to present an algorithm for the management of this condition. Methods Three patients presented with typical intestinal angina and weight loss. One patient was subjected to prophylactic revascularization during open abdominal aortic aneurysm repair. Surgical techniques included: 1) Bypass from the infrarenal aorta to the SMA; 2) Bypass from an aorto-bifemoral polyester graft to the SMA; 3) Bypass from the right iliac artery to the SMA; 4) Bypass from the right graft limb of an aorto-biiliac polyester graft to the median colic artery at Riolan's arcade. PTFE was used in all surgeries. All grafts were placed in a retrograde configuration, tunneled under the left renal vein, making a smooth C-loop. A treatment algorithm was constructed based on the institution's experience and a review of recent literature. Results All patients demonstrated resolution of symptoms and recovery of body weight. All grafts are patent after mean follow-up of two years. Conclusions Open revascularization using the C-loop configuration is a valuable technique for CMI and may be considered in selected cases. The algorithm constructed may help decision planning in other quaternary centers.

Resumo Contexto A isquemia mesentérica crônica (IMC) é uma doença debilitante, com grave impacto na qualidade de vida. A literatura recomenda a angioplastia com stent da artéria mesentérica superior (AMS) como primeira opção de tratamento, mas há falta de consenso que defina indicações precisas para a revascularização aberta. Objetivos Descrever uma série de quatro pacientes com IMC, tratados com revascularização aberta, e apresentar um algoritmo para o manejo dessa condição. Métodos Três pacientes apresentaram angina intestinal típica e perda ponderal. Uma paciente foi submetida a reparo aberto de aneurisma da aorta abdominal e apresentava obstrução da AMS, que foi revascularizada profilaticamente. As técnicas cirúrgicas incluíram: 1) enxerto entre a aorta infrarrenal e a AMS; 2) enxerto entre o dácron utilizado em um enxerto aortobifemoral e a AMS; 3) enxerto entre a artéria ilíaca comum direita e a AMS; e 4) enxerto entre o ramo direito do dácron utilizado em um enxerto aorto-biilíaco e a artéria cólica média (ao nível da arcada de Riolan). Todos os enxertos foram feitos utilizando politetrafluoretileno em uma configuração retrógrada, tunelizados abaixo da veia renal esquerda, fazendo uma alça em C. Resultados Todos os pacientes demonstraram resolução dos sintomas e ganho ponderal. Todos os enxertos se mantiveram pérvios durante um seguimento médio de 2 anos. Conclusões A revascularização aberta para IMC utilizando-se a alça em C é uma técnica valiosa e pode ser considerada em pacientes selecionados. O algoritmo proposto pode auxiliar na decisão terapêutica em centros quaternários.

Safety of preoperative branch embolization in patients undergoing evar / Segurança da embolização pré-operatória do ramo em pacientes submetidos a evar

Abstract The purpose of this systematic review is to evaluate the safety of pre-endovascular abdominal aortic aneurysm repair (EVAR) embolization of aortic side branches - the inferior mesenteric artery and lumbar arteries. Preferred Reporting Items for Systematic Reviews and Meta-Analysis guidelines were followed. A search of MEDLINE and DIMENSION databases identified 9 studies published from 2011 to 2021 that satisfied the inclusion and exclusion criteria. These studies were analyzed to detect the incidence of embolization-related complications. A total of 482 patients underwent preoperative aortic side branch embolization, 30 (6.2%) of whom suffered some kind of minor complication. The only major complication observed was ischemic colitis in 4 (0.82%) patients, two (0.41%) of whom died after bowel resection surgery. Regarding these findings, aortic side branch embolization seems to be a safe procedure, with very low percentages of both minor and major complications.

Resumo O objetivo desta revisão sistemática foi avaliar a segurança da embolização de artéria mesentérica inferior (AMI) e artérias lombares (ALs) pré-correção endovascular de aneurisma da aorta abdominal. Foram realizadas pesquisas nas bases de dados MEDLINE e Dimensions. Foram encontrados 9 estudos publicados de 2011 a 2021 que atendiam aos critérios de inclusão e exclusão. Os estudos foram analisados ​​para definir a incidência de complicações relacionadas à embolização. No total, 482 pacientes foram submetidos a embolização de AMI e/ou ALs, dos quais 30 (6,2%) sofreram algum tipo de complicação menor. A única complicação importante observada foi colite isquêmica em 4 (0,82%) pacientes. Dois (0,41%) desses pacientes morreram após cirurgia de ressecção intestinal. Em relação a esses achados, a embolização de AMI e ALs parece ser um procedimento seguro, com um percentual muito baixo de complicações menores e importantes.

Estudo sobre a prevalência de doença carotídea detectada por ultrassonografia nos casos de AVC isquêmico de um hospital público de Santa Catarina / Study on the prevalence of carotid artery disease detected by ultrasonography in cases of ischemic stroke at a public hospital in Santa Catarina

Fundamento: Acidentes Vasculares Cerebrais Isquêmicos (AVCi) representam significativa parcela dentre as causas da morbimortalidade mundial. Estenose das artérias carótidas e vertebrais são consideradas fator de risco para tal desfecho. A Ultrassonografia com Doppler (USG Doppler) das artérias extracranianas pode ser útil na identificação de pacientes com estenose significativa por ser um método inócuo e acessível. Objetivos: avaliar a prevalência de estenose nas artérias extracranianas diagnosticadas através do estudo com USG Doppler e a prevalência de fatores associados em pacientes com quadro de AVCi. Métodos: Trata-se de estudo retrospectivo, transversal, a partir da análise de prontuários dos pacientes internados com quadro de AVCi no Hospital Regional de São José, Santa Catarina, Brasil. O estudo ocorreu entre janeiro de 2020 e dezembro de 2021. A análise ultrassonográfica foi realizada por médicos radiologistas habilitados, a partir do uso de aparelho validado (GE Logic P9 com transdutor linear multifrequencial 6-15MHz). Resultados: Dentre os 239 pacientes incluídos, destaca-se a significativa prevalência de comorbidades associadas ao AVCi, como hipertensão arterial sistêmica (78,2%) e tabagismo (40,6%). A distribuição entre os sexos foi homogênea (58,2 versus 41,8%) e 70,3% dos pacientes possuíam idade superior a 60 anos de idade. A taxa de pacientes com alterações hemodinamicamente significativas (estenose >50% da luz do vaso) das artérias carótidas e vertebrais foi de 29,2%. O tabagismo foi o único fator de risco que se correlacionou estatisticamente com a ocorrência de AVCi decorrente do acometimento das artérias carótidas ou vertebrais (RP 1,708; IC 1,057-2,761; p=0,028). Conclusão: O USG com Doppler das artérias extracranianas é ferramenta útil na investigação dos casos de AVCi, visto que a prevalência de doença significativa dos grandes vasos extracranianos (estenose>50%) se aproxima de 30%.

Background: Ischemic Strokes represent a sizable portion among the causes of morbidity and mortality worldwide. Stenosis of the carotid and vertebral arteries represent a risk factor to this outcome. Ultrasonography with Doppler of the extracranial arteries can be useful in identifying patients with significant stenosis because it is a harmless and accessible method. Objectives: To assess the prevalence of stenosis in the extracranial arteries diagnosed through Doppler ultrasound examination and the prevalence of associated factors in patients with ischemic stroke Methods: This is a retrospective, cross-sectional study based on the analysis of medical records of patients admitted with ischemic stroke at the Regional Hospital of São José, Santa Catarina, Brazil. The study was conducted between January 2020 and December 2021. Ultrasonographic analysis was performed by qualified radiologists, using a validated device (GE Logic P9 with a multi-frequency linear transducer 6-15MHz). Results: Among the 239 included patients, there is a significant prevalence of comorbidities associated with ischemic stroke, such as systemic arterial hypertension (78.2%) and smoking (40.6%). The distribution between genders was homogeneous (58.2% versus 41.8%), and 70.3% of the patients were over 60 years old. The rate of patients with hemodynamically significant alterations (stenosis >50% of the vessel lumen) in the carotid and vertebral arteries was 29.2%. Smoking was the only risk factor that statistically correlated with the occurrence of ischemic stroke resulting from the involvement of the carotid or vertebral arteries (PR 1.708; CI 1.057-2.761; p=0.028). Conclusion: Ultrasonography with Doppler of the extracranial arteries is a useful tool in the investigation of ischemic stroke cases, given that the prevalence of significant disease in the large extracranial vessels (stenosis >50%) approaches 30%.

Evaluación angiográfica de la distribución anatómica de la irrigación sanguínea del ángulo esplénico del colon en población chilena

Objetivo: Identificar los patrones de distribución vascular del ángulo esplénico del colon (AEC) en la población chilena para su comparación con la literatura oriental (Fukuoka). Materiales y Métodos: Estudio descriptivo, transversal. Se caracterizó la irrigación del AEC de imágenes con protocolo Urotac realizadas en Clínica INDISA entre el año 2020 y 2021 (n = 127), clasificándolas dentro de 6 tipos descritos por Fukuoka. Se evaluaron características demográficas y comorbilidades. Las variables fueron analizadas utilizando estadística descriptiva y la significancia mediante la prueba Chi2. Resultados: Existen diferencias en los tipos irrigación del AEC entre la serie local y Fukuoka, la irrigación tipo 3 fue la que presentó mayor variación (p < 0,05). El tipo 1 es la más frecuente (34,7%), sin casos del Tipo 4. No se identificó diferencia entre los distintos tipos de irrigación con relación a las variables demográficas y comorbilidades. Discusión: Al comparar nuestra serie con la oriental se evidenció similar frecuencia en tipos 1 y 6, mayor en tipos 3 y 5, y tipos 2 y 4 con menor representación. Se identificó un mayor aporte en la irrigación del AEC por la arteria cólica izquierda (ACI) en la población estudiada (64,6%). Conclusión: Nuestra población tiene mayor participación de ACI en irrigación del AEC que orientales (64,6% vs 49,6%), los tipos más frecuentes son 1, 3 y 6, el Tipo 1 es la forma más frecuente de irrigación, similar a Fukuoka (34,7% vs 39,7%), Tipo 3 tiene mayor representación en nuestra población que en la oriental (29,9% vs 9,9%).

Objective: To identify the vascular distribution patterns of the splenic flexure of the colon (AEC) in the Chilean population for comparison with the oriental literature (Fukuoka). Methods: Descriptive, cross-sectional study. The irrigation of the AEC of images with the Urotac protocol performed at the INDISA Clinic between 2020 and 2021 (n = 127) was characterized, classifying them into 6 types described by Fukuoka. Demographic characteristics and comorbidities were evaluated. Variables were analyzed using descriptive statistics and significance using the Chi2 test. Results: There are differences in the types of irrigation of the AEC between the local series and Fukuoka, irrigation type 3 was the one that presented the greatest variation (p < 0.05). Type 1 is the most frequent (34.7%), with no cases of Type 4. No difference was identified between the different types of irrigation in relation to demographic variables and comorbidities. Discussion: When comparing our series with the eastern one, a similar frequency was found in types 1 and 6, higher in types 3 and 5, and types 2 and 4 with less representation. A greater contribution was identified in the irrigation of the AEC by the left colic artery (ICA) in the population studied (64.6%). Conclusion: Our population has a greater participation of ICA in AEC irrigation than Orientals (64.6% vs 49.6%), the most frequent types are 1, 3 and 6, Type 1 is the most frequent form of irrigation, similar to Fukuoka (34.7% vs 39.7%), Type 3 is more represented in our population than in the eastern one (29.9% vs 9.9%).

Riesgo de accidente cerebrovascular en pacientes con aterosclerosis carotídea asintomática: ¿se debe tratar médicamente o quirúrgicamente?

Los desórdenes cerebrovasculares siguen siendo la primera causa de morbilidad y mortalidad neurológica en el mundo, representando una de las entidades patológicas que genera mayor carga de enfermedad a nivel global. La aterosclerosis, o estenosis carotídea, es un potencial factor de riesgo para el ictus isquémico. La identificación y seguimiento estricto de esta condición son esenciales en la prevención secundaria de complicaciones a través de la atención primaria y el manejo especializado del riesgo cardiometabólico. No obstante, dependiendo de este riesgo y/o la presencia de sintomatología, es necesario realizar un manejo definitivo. Actualmente, existe controversia sobre si es mejor tratar la estenosis carotídea asintomática, ya sea médica o quirúrgicamente. Teniendo en cuenta la relevancia de esta entidad, el objetivo de esta revisión consiste en analizar la evidencia reciente sobre el riesgo de ictus isquémico en la aterosclerosis carotídea asintomática en adultos, y el potencial beneficio del manejo quirúrgico vs. farmacológico de esta condición. Para esto, se llevó a cabo una búsqueda bibliográfica en las bases de datos PubMed, ScienceDirect, Web of Science y MEDLINE, hasta el año 2023. Se evidenció que el riesgo de ictus asociado a estenosis carotídea asintomática es significativo (>10 %, aproximadamente), incluso en aquellos con terapia antiplaquetaria e hipolipemiante activa. En aquellos con manejo médico, la supervivencia a cinco años es alrededor del 80 %. Sin embargo, la progresión de la estenosis sucede en promedio en más del 60 % de los casos, y es significativa. Por el contrario, el stent carotídeo y la endarterectomía son intervenciones resolutivas. Pero existe un riesgo mayor comparado con la terapia médica, el cual se atribuye al periodo periy posoperatorio, así como a 30 días de aparición o recurrencia del ictus, infarto agudo de miocardio o muerte por cualquier causa; aunque el uso de la endarterectomía ha demostrado beneficios superiores a largo plazo en cuanto a estos mismos desenlaces. Entonces, la evidencia es heterogénea en cuanto a la superioridad del tratamiento quirúrgico comparado con la terapia farmacológica en el manejo de la aterosclerosis o estenosis carotídea asintomática. Sin embargo, parece ser que el manejo quirúrgico, específicamente la endarterectomía, podría impactar significativamente sobre la aparición o recurrencia del ictus ipsilateral y muerte a largo plazo, pero con resultados controversiales periy postoperatorios.

Cerebrovascular disorders remain the leading cause of neurological morbidity and mortality in the world, representing one of the pathological entities responsible for the greatest burden of disease worldwide. Carotid atherosclerosis or stenosis is a potential risk factor for ischemic stroke. The identification and strict follow-up of this condition are essential in the secondary prevention of complications through primary care and the specialized treatment of cardiometabolic risk. However, depending on this risk and/or presence of symptoms, definitive treatment is necessary. Currently, there is controversy as to whether asymptomatic carotid stenosis is better to be treated medically or surgically. Considering the significance of such entity, this review aims to analyze recent evidence on the risk of ischemic stroke in the case of asymptomatic carotid atherosclerosis among adults, as well as the potential benefit of the surgical vs. pharmacological treatment for this condition. For this purpose, a literature search for publications up to 2023 was carried out in PubMed, ScienceDirect, Web of Science and MEDLINE databases. It was shown that there is a significant risk of stroke associated with asymptomatic carotid stenosis (> 10 % approximately), even in patients with active antiplatelet and lipid-lowering therapy. Out of all those who receive medical treatment, around 80 % had a five-year survival rate. However, stenosis progression occurs on average in more than 60 % of the cases and is significant. On the other hand, carotid stenting and endarterectomy are curative interventions. Nevertheless, these procedures involve a higher risk compared to the medical therapy during the periand postoperative period, as well as 30 days afterwards, due to the occurrence or recurrence of stroke, acute myocardial infarction or death from any cause. Despite this, the use of endarterectomy has shown superior long-term benefits concerning these same outcomes. Thus, evidence regarding the superiority of surgical treatment compared to pharmacological treatment for asymptomatic carotid atherosclerosis or stenosis is heterogeneous. However, it seems that surgical treatment, specifically endarterectomy, could have a significant impact on the occurrence or recurrence of ipsilateral stroke and death in the long term but with controversial periand postoperative outcomes.

Comparison between Wright and Shukla formulas: which is better for the placement of umbilical catheters in newborns ≤ 1500 g? / Comparación entre las fórmulas de Wright y de Shukla: ¿cuál es mejor para la colocación de catéteres umbilicales en recién nacidos ≤ 1500 g?

Abstract Background: Intravascular venous (VUC) or arterial (AUC) umbilical catheter placement is the most frequent invasive procedure in the neonatal intensive care unit (NICU). Either Wright's or Shukla's formula is used to introduce the catheters. However, Shukla's formula is associated with incorrect insertion, especially for newborns < 1500 g. This study aimed to determine by chest X-ray if Wright's formula is better than Shukla's formula for the correct placement of umbilical catheters in newborns ≤ 1500 g. Methods: We included patients admitted to the NICU of a secondary-level hospital between 2021-2022 who received VUC or AUC through the Wright or Shukla formulas. Results: A total of 129 newborns were included: 78 with VUC and 51 with AUC. In VUC, 50% with Wright and 36.8% with Shukla formulas had the correct location, (p = 0.24). In AUC, 56.6 % with Wright and 52.4% with Shukla formulas were placed correctly placed, (p = 0.76). VUC with weight < 1000 g were correctly placed in 36.4% with Wright and 33.3% with Shukla formulas (p = 0.58). VUC in newborns > 1000 g were correctly placed in 66.6% with Wright and 38.4% with Shukla formulas (p = 0.065). AUC in newborns < 1000 g were correctly placed in 45% using Wright and 42.9% Shukla formulas (p = 0.63). AUC in newborns > 1000 g were correctly placed in 80% using Wright and 57.1% Shukla formulas (p = 0.23). Conclusions: We found 13% more correctly placed VUC using Wright's formula. Moreover, Wright's formula was 29% above Shukla's VUC placement in neonates > 1000 g, although there was no significant difference due to the sample size.

Resumen Introducción: La colocación de catéteres intravasculares venosos umbilicales (CVU) y arteriales (CAU) es el procedimiento invasivo más frecuente en la unidad de cuidados intensivos neonatales (UCIN). Para introducirlos se utilizan las fórmulas de Wright y de Shukla, aunque esta última podría estar asociada con una inserción incorrecta, especialmente en neonatos < 1500 g. El objetivo de este estudio fue determinar mediante radiografía de tórax cuál fórmula es mejor para la correcta colocación de catéteres umbilicales en recién nacidos ≤ 1500 g. Métodos: Se incluyeron los pacientes ingresados en la UCIN de un hospital de segundo nivel entre 2021-2022 que recibieron CVU o CAU mediante las fórmulas de Wrigth o Shukla. Resultados: Se incluyeron en total 129 recién nacidos: 78 CVU y 51 CAU. En CVU, Wright 50% y Shukla 36.8% tuvieron localización correcta, p = 0.24. En las CAU, Wright 56.6% y Shukla 52.4% tenían una ubicación correcta, p = 0.76. En CVU con peso < 1000 g, Wright 36.4% y Shukla 33.3% bien situados, p = 0.58. En CVU > 1000 g, Wright 66.6% y Shukla 38.4% bien situados, p = 0.065. En CAU < 1000 g, Wright 45% y Shukla 42.9%, p = 0.63. En CAU con peso > 1000 g, Wright 80% y Shukla 57.1%, p = 0.23. Conclusiones: La colocación del CVU fue 13% mejor con la fórmula de Wright. La fórmula de Wright superó en el 29% la colocación del CVU en los neonatos > 1000 g en comparación con la de Shukla, aunque no hubo diferencia significativa debido al tamaño de la muestra.

Limitaciones de los puntajes de riesgo cardiovascular en prevención primaria. ¿Una oportunidad para los moduladores de riesgo? / Limitations of cardiovascular risk scores in primary prevention. An opportunity for risk modulators?

RESUMEN Introducción : Los puntajes de riesgo cardiovascular tienen limitaciones relacionadas con la calibración, la discriminación y la baja sensibilidad. Se han identificado diferentes "moduladores de riesgo" que permiten mejorar la estratificación del riesgo cardiovascular: placa aterosclerótica carotídea (PAC), puntaje de calcio arterial coronario (pCAC) y lipoproteína(a) [Lp(a)]. Objetivos : 1) determinar la prevalencia de los moduladores de riesgo citados en una población en prevención primaria; 2) determinar la concordancia entre los 2 métodos de detección de aterosclerosis subclínica; 3) establecer qué proporción de pacientes deberían recibir estatinas inicialmente, según su puntaje de riesgo, y posteriormente con el conocimiento de los moduladores de riesgo. Material y métodos : Se incluyeron individuos de 18 a 79 años, que asistieron para una evaluación de riesgo cardiovascular y que no estaban recibiendo tratamiento hipolipemiante. Se calculó el puntaje de riesgo (ASCVD Risk Estimator) en cada paciente. Se evaluó la presencia de PAC, el pCAC y el nivel plasmático de Lp(a). Resultados : Se incluyeron 348 pacientes (edad media 55,6 ± 12,2 años, 45,4% hombres). En la población total, 29,8%, 36,8% y 53,2% de los pacientes mostraron un valor de Lp(a) ≥ 50 mg/dL, PAC o un pCAC > 0, respectivamente. La prevalencia de PAC y pCAC fue progresivamente mayor según la categoría de riesgo cardiovascular; sin embargo, la proporción de sujetos de bajo riesgo que tenían moduladores de riesgo fue considerable (Lp(a) ≥ 50 mg/dl: 25,7%; PAC: 22%; pCAC > 0: 33%). En los 60 individuos menores de 45 años la prevalencia de pCAC > 0 y PAC fue de 18,3% y 10%, respectivamente. La concordancia entre los dos métodos para determinar la presencia de ateromatosis subclínica fue discreta (kappa 0,33). La indicación del tratamiento con estatinas aumentó un 31,6% luego de evaluar la presencia de moduladores. Conclusión : La presencia de moduladores de riesgo fue frecuente en esta población en prevención primaria, incluso en sujetos de bajo riesgo o menores de 45 años. La detección de moduladores de riesgo podría mejorar la estratificación inicial y llevar a reconsiderar el tratamiento con estatinas.

ABSTRACT Background : Cardiovascular risk scores have limitations related to calibration, discrimination, and low sensitivity. Different "risk modulators" have been identified to improve cardiovascular risk stratification: carotid atherosclerotic plaque (CAP), coronary artery calcium (CAC) score and lipoprotein(a) [Lp(a)]. Objectives : The aims of this study were: 1) to determine the prevalence of risk modulators mentioned in a primary prevention population; 2) determine the concordance between the 2 methods of detecting subclinical atherosclerosis; and 3) establish which proportion of patients should receive statins according to the initial risk stratification and after being recategorized by screening for risk modulators. Methods : Individuals aged 18 to 79 years who consulted for cardiovascular risk assessment and who were not receiving lipid-lowering treatment were included. The risk score was calculated in each patient using ASCVD Risk Estimator. The presence of CAP, CAC score and Lp(a) level were evaluated. Results : The cohort was made up of 348 patients; mean age was 55.6 ± 12.2 years and 45.4% were men. In the total population, 29.8%, 36.8%, and 53.2% of patients showed Lp(a) value ≥50 mg/dL, CAP, or a CAC score >0, respectively. The prevalence of CAP and CAC score was progressively higher according to the cardiovascular risk category; however, the proportion of low-risk subjects who had risk modulators was considerable (Lp(a) ≥50 mg/dl: 25.7%; CAP: 22%; CAC score >0: 33%). In the 60 subjects <45 years, the prevalence of CAC score >0 and CAP was 18.3% and 10%, respectively. The agreement between the two methods for quantifying subclinical atheromatosis was fair (kappa= 0.33). The indication for statin treatment increased by 31.6% after evaluating the presence of modulators. Conclusion : The presence of risk modulators was common in this population in primary prevention, even in low-risk subjects or < 45 years. Detection of risk modulators could improve initial stratification and lead to reconsideration of statin treatment.

Acute Carpal Tunnel Syndrome due to Persistent Median Artery thrombosis: Case report / Síndrome do túnel do carpo aguda por trombose da artéria mediana: Relato de caso

Abstract Carpal tunnel syndrome is the most common compressive neuropathy of the upper limb, affecting ~ 4% of the general population. The clinical picture is characterized by pain and, mainly, paresthesia in the median nerve territory, of insidious onset and, in the most severe cases, loss of strength and atrophy of the thenar musculature is observed. It is an extremely common pathology in the daily practice of hand surgery, and in most cases, it can be treated with conservative methods. We present here an atypical case of carpal tunnel syndrome, of acute onset, triggered by persistent median artery (PMA) thrombosis, condition associated with distal embolization and hypoper-fusion of the limb.

Resumo A síndrome do túnel do carpo é a neuropatia compressiva mais comum do membro superior, afetando ~ 4% da população geral. O quadro clínico caracteriza-se por dor e, principalmente, parestesia no território do nervo mediano, de início insidioso e, nos casos mais graves, observa-se perda de força e atrofia da musculatura tenar. Trata-se de patologia extremamente comum na prática diária de cirurgia da mão, e na maior parte dos casos pode ser tratada com métodos conservadores. Apresentamos aqui um caso atípico de síndrome do túnel do carpo, de surgimento agudo, desencadeado pela trombose da artéria mediana persistente, quadro associado com embolização distal e hipoperfusão do membro.

Arterias sigmoideas: bases para una nueva clasificación / Sigmoid arteries: bases for a new classification

Las arterias sigmoideas son ramas de la arteria mesentérica inferior e irrigan al colon sigmoideo. Se originan del tronco de las arterias sigmoideas. Esta es la descripción más frecuente según los autores consultados. El objetivo fue analizar las variaciones en el origen y distribución de las arterias sigmoideas mediante disección. Se utilizaron 13 preparados cadavéricos formolizados al 10 %. Se disecó la cavidad abdominal para identificar a las arterias sigmoideas. Se evidenció su bifurcación paralela al colon sigmoideo. Se lo delimitó mediante reparos palpables. Patrón I: 4 casos (30,8 %). Variante de la arcada sigmoidea como rama colateral de la arteria mesentérica inferior. Tipo Ia: 1 caso (25 %). Sin asociaciones. Tipo Ib: 1 caso (25 %). Asociada al tronco sigmoideo. Tipo Ic: 2 casos (50 %). Asociada a arterias sigmoideas accesorias. Patrón II: 6 casos (46,2 %). Variante del tronco común entre arteria cólica izquierda y arterias destinadas al colon sigmoideo. Tipo IIa: 3 casos (50 %). Sin asociaciones. Tipo IIb: 2 casos (33,3 %). Asociado al tronco sigmoideo. Tipo IIc: 1 caso (16,7 %). Asociado a arterias sigmoideas accesorias. Patrón III: 3 casos (23 %). Variante clásica. Se definió por la ausencia del tronco común con la arteria cólica izquierda y de la arcada sigmoidea. Tipo IIIa: 2 casos (66,7 %). Un número variable de arterias sigmoideas nacen como ramas colaterales de la arteria mesentérica inferior, sin asociarse al tronco sigmoideo. Tipo IIIb: 1 caso (33,3 %). La arteria cólica izquierda emite como rama colateral la primera arteria sigmoidea y se asocia al tronco sigmoideo. 1. El patrón II es el prevalente en este trabajo (46,2 %). 2. La variante clásica no es la predominante en esta investigación (23 %). 3. La arcada sigmoidea tiene 53,8 % de incidencia.

SUMMARY: The sigmoid arteries are branches of the inferior mesenteric artery and supply the sigmoid colon. They originate from the trunk of the sigmoids. This is the most frequent description according to the consulted authors. The objective is to analyze the variations in the origin and distribution of the sigmoid arteries through dissection. 13 cadaveric preparations formalized at 10 % and instruments were used. The abdominal cavity was dissected to identify the sigmoid arteries. Its bifurcation parallel to the sigmoid colon is evident. It is delimited by palpable repairs. Pattern I: 4 cases (30.8 %). Variant of the sigmoid arcade as a collateral branch of the inferior mesenteric artery. Type Ia: 1 case (25 %). No associations. Type Ib: 1 case (25 %). Associated with the sigmoid trunk. Type Ic: 2 cases (50 %). Associated with accessory sigmoid arteries. Pattern II: 6 cases (46.2 %). Variant of the common trunk between the left colic artery and arteries destined for the sigmoid colon. Type IIa: 3 cases (50 %). No associations. Type IIb: 2 cases (33.3 %). Associated with the sigmoid trunk. Type IIc: 1 case (16.7 %). Associated with accessory sigmoid arteries. Pattern III: 3 cases (23 %). Classic variant. It was defined by the absence of the common trunk with the left colic artery and the sigmoid arcade. Type IIIa: 2 cases (66.7 %). A variable number of sigmoid arteries arise as collateral branches of the inferior mesenteric artery, without being associated with the sigmoid trunk. Type IIIb: 1 case (33.3 %). The left colic artery gives off the first sigmoid artery as a collateral branch and is associated with the sigmoid trunk. 1. Pattern II is the most prevalent in this study (46.2 %). 2. The classic variant is not the predominant one in this research (23 %). 3. The sigmoid arcade has a 53.8 % incidence.

Hematoma espontáneo de la vaina de los rectos en paciente con COVID-19 y leucemia mieloide crónica. Reporte de un caso clínico y revisión de la literatura

Introducción: El hematoma de la vaina de los rectos es poco frecuente. En este reporte se presenta un caso clínico de este cuadro en un paciente con neumonía por COVID-19 y leucemia mieloide crónica, junto con una revisión de literatura. Caso Clínico: Paciente masculino de 55 años, hospitalizado por neumonía por COVID-19 y leucemia mieloide crónica, presenta taquicardia, hipotensión y aumento de volumen abdominal asimétrico. En la tomografía computarizada se evidencia un hematoma de la vaina de los rectos. Se realiza drenaje quirúrgico y control del sangrado. No presentó complicaciones postoperatorias ni necesidad de reoperación. Discusión: Las complicaciones hemorrágicas en pacientes con COVID-19 están poco descritas. El sangrado es una posible complicación en pacientes con leucemia mieloide crónica. Es relevante tener en cuenta el hematoma de la vaina de los rectos en pacientes con COVID-19 y/o leucemia mieloide crónica que presenten aumento de volumen abdominal, para un manejo precoz por un equipo multidisciplinario. Conclusión: La vigilancia activa y el alto índice de sospecha son clave para identificar posibles complicaciones hemorrágicas en pacientes con COVID-19 y/o leucemia mieloide crónica.

Introduction: Rectus sheath hematoma is a rare entity. This report presents a clinical case of a rectus sheath hematoma in a patient with COVID-19 pneumonia and chronic myeloid leukemia, along with a review of the literature. Case Report: A 55-year-old male patient, hospitalized for COVID-19 pneumonia and chronic myeloid leukemia, presents with tachycardia and hypotension. Computed tomography shows a rectus sheath hematoma. Surgical management was performed to control bleeding and drainage of the hematoma. There were no postoperative complications or need for reoperation. Discussion: Hemorrhagic complications in patients with COVID-19 are seldomly reported. Bleeding is a possible complication in patients with chronic myeloid leukemia. It is important to take into account rectus sheath hematoma in patients with COVID-19 and/or chronic myeloid leukemia who present with abdominal pain, for early management by a multidisciplinary team. Conclusion: Active surveillance and a high index of suspicion are key to identifying potential bleeding complications in patients with COVID-19 and/or chronic myeloid leukemia.

Prevalencia de infarto de miocardio sin enfermedad coronaria aterosclerótica obstructiva (MINOCA) / Prevalence of myocardial infarction with non-obstructive atherosclerotic coronary artery disease (MINOCA)

Resumen Objetivo: Determinar la prevalencia y factores de riesgo cardiovascular de los pacientes con infarto agudo de miocardio sin evidencia de lesiones coronarias obstructivas en la arteriografía coronaria, en una institución de salud con servicios de mediana y alta complejidad en la ciudad de Valledupar (Cesar), Colombia. Materiales y métodos: Estudio descriptivo, de corte transversal, único centro, en el que se incluyeron pacientes mayores de 18 años, atendidos en un centro hospitalario en la ciudad de Valledupar con síndrome coronario agudo, a quienes se les realizó arteriografía coronaria y cumplían con los criterios para MINOCA según la cuarta definición universal de infarto de miocardio, desde enero de 2016 hasta diciembre de 2019. Se calculó la prevalencia de MINOCA y descripción por sexo, edad, factores de riesgo cardiovascular y tipo de presentación del SCA. Resultados: De un total de 3.022 pacientes de la población estudiada con diagnóstico de infarto agudo de miocardio, 215 no tenían lesiones coronarias obstructivas, lo cual arrojó una prevalencia del 7.11% (IC 95%: 6.20-8.03%). La mayoría fueron mujeres (53.02%) con una edad promedio de 56,6 años. El 75.8% de los pacientes tenía al menos un factor de riesgo cardiovascular, con predominio de hipertensión arterial (67.4 %). La mayoría presentó síndrome coronario agudo sin elevación del segmento ST (93.5%). Conclusión: La prevalencia de MINOCA en nuestra institución se encuentra en el rango descrito en la literatura médica y tiene características clínicas similares en reportes publicados. Se plantea la necesidad de realizar estudios posteriores para la determinación de la causa en este tipo de pacientes.

Abstract Objective: To determine the prevalence and cardiovascular risk factors in patients with acute myocardial infarction with non-obstructive coronary lesions in coronary arteriography in a health institution with intermediate and specialized care in the city of Valledupar (Cesar), Colombia. Materials and methods: This was a descriptive, cross-sectional, single-center study. All patients included were over 18 years of age. They presented an acute coronary syndrome and were treated in a health center in Valledupar, Colombia. Coronary arteriography was completed, and patients met the criteria for MINOCA according to the fourth universal definition of myocardial infarction. The prevalence of MINOCA and description by sex, age, cardiovascular risk factors, and type of ACS presentation were calculated. The study was carried out between January 2016 and December 2019. Results: Of the 3.022 patients diagnosed with acute myocardial infarction, 215 did not have non-obstructive coronary lesions, with a prevalence of 7.11% (CI 95%: 6.20-8.03%). Most subjects were women (53.02 %), and the mean age was 56.6 years. 75.8% of participants had at least one cardiovascular risk factor, predominantly arterial hypertension (67.4%). Most patients had non-ST-segment elevation acute coronary syndrome (93.5%). Conclusion: The prevalence of MINOCA in our institution is within the range described in the medical literature. The clinical characteristics found were similar to those reported in the literature. Further studies need to be conducted to determine the cause in this type of patient.

Elastografia por cisalhamento (shear wave) para placas ateroscleróticas carotídeas extracranianas: princípios técnicos e como realizar / Shear wave elastography for extracranial carotid atherosclerotic plaques: technical principles and how to do it

Resumo Na esteira de estudos direcionados à placa aterosclerótica e em busca de variáveis quantificáveis que adicionem informações à tomada de decisão terapêutica, a avaliação a partir de elastografia shear wave (SWE) se apresenta como alternativa reprodutível e promissora. Utilizamos um único aparelho Logiq S8 (General Electric, Boston, Massachusetts, Estados Unidos) com um transdutor linear multifrequencial 8,5-11 MHz em 10 MHz em corte longitudinal. Consideramos critérios relevantes para a aquisição de imagem: adequada insonação longitudinal, diferenciação do complexo médio-intimal, delineamento de túnicas adventícias proximal e distal, lúmen vascular, boa visualização da placa aterosclerótica, ciclo em diástole ventricular e ausência de alterações incongruentes. A SWE é um método emergente e extremamente promissor no contexto da avaliação de placas carotídeas, podendo contribuir no futuro para a tomada de decisão terapêutica baseada em características relativas à placa aterosclerótica de forma reprodutível entre aparelhos e examinadores.

Abstract In the wake of studies targeting atherosclerotic plaques and searching for quantifiable variables that contribute additional information to therapeutic decision-making, plaque assessment using Shear Wave Elastography (SWE) is emerging as a reproducible and promising alternative. We used a single Logiq S8 device (General Electric, Boston, Massachusetts, United States) with an 8.5-11MHz multifrequency linear transducer at 10MHz in longitudinal section. We considered relevant criteria for image acquisition: adequate longitudinal insonation, differentiation of the intima-media complex, delineation of proximal and distal tunica adventitia and the vascular lumen, good visualization of the atherosclerotic plaque, cardiac cycle in ventricular diastole, and absence of incongruous changes. SWE is an emerging and extremely promising method for assessment of carotid plaques that may contribute to therapeutic decision-making based on characteristics related to the atherosclerotic plaque, with inter-device and inter-examiner reproducibility.

Association between Hospital Carotid Endarterectomy Procedure Volumes and In-Hospital Mortality in São Paulo State / Associação do volume hospitalar de endarterectomia carotídea com a mortalidade intra-hospitalar no estado de São Paulo

Abstract Background Previous studies indicate an inverse relationship between hospital volume and mortality after carotid endarterectomy. However, data at the level of Brazil are lacking. Objectives To assess the relationship between hospital carotid endarterectomy procedure volumes and mortality in the state of São Paulo. Methods Data from the São Paulo State Hospital Information System on all carotid endarterectomies performed between 2015 and 2019 were analyzed. Hospitals were categorized into clusters by annual volume of surgeries (1-10, 11-25, and ≥26). Multiple logistic regression models were used to determine whether the volume of carotid endarterectomy procedures was an independent predictor of in-hospital mortality among patients undergoing this procedure. Results Crude in-hospital mortality was nearly 60 percent lower in patients who underwent carotid endarterectomy at the highest volume hospitals than among those who underwent endarterectomy at the lowest volume hospitals (unadjusted OR of survival to hospital discharge, 2.41; 95% CI, 1.11-5.23; p = 0.027). Although this lower rate represents 1.5 fewer deaths per 100 patients treated, high-volume centers are more likely than low-volume centers to perform elective procedures, thus the analysis did not retain statistical significance when adjusted for admission character (OR, 1.69; 95% CI, 0.74-3.87; p = 0.215). Conclusions In a contemporary Brazilian registry, higher volume carotid endarterectomy centers were associated with lower in-hospital mortality than lower volume centers. Further studies are needed to verify this relationship considering the presence of symptoms in patients.

Resumo Contexto Estudos indicam uma relação inversa entre volume hospitalar e mortalidade após endarterectomia carotídea. Entretanto, não há dados a nível brasileiro. Objetivos Avaliar a relação entre volume hospitalar de endarterectomia carotídea e mortalidade no estado de São Paulo. Métodos Foram analisados dados do Sistema de Informação Hospitalar do Estado de São Paulo de todas as endarterectomias carotídeas realizadas entre 2015 e 2019. Os hospitais foram categorizados em grupos de acordo com o volume anual de cirurgias (1-10, 11-25 e ≥26). Modelos de regressão logística múltipla foram usados para determinar se o volume de endarterectomias carotídeas era um preditor independente de mortalidade intra-hospitalar entre os pacientes submetidos a esse procedimento. Resultados A mortalidade intra-hospitalar foi quase 60% menor nos pacientes submetidos a endarterectomia carotídea nos hospitais de maior volume em comparação aos pacientes submetidos a endarterectomia nos hospitais de menor volume (OR não ajustado de sobrevida após alta hospitalar, 2,41; IC 95%, 1,11-5,23; p = 0,027). Embora essa taxa mais baixa represente 1,5 menos mortes por 100 pacientes tratados, os centros de alto volume são mais propensos do que os centros de baixo volume a realizarem procedimentos eletivos; portanto, a análise não reteve significância quando ajustada para o caráter de admissão (OR, 1,69; IC 95%, 0,74-3,87; p = 0,215). Conclusões Em um registro brasileiro contemporâneo, centros com maior volume de endarterectomia carotídea foram associados a menor mortalidade intra-hospitalar em comparação aos centros de menor volume. Mais estudos são necessários para verificar essa relação considerando a presença de sintomas em pacientes.

Maternal, obstetric, and fetal Doppler characteristics in a high-risk population: prediction of adverse perinatal outcomes and of cesarean section due to intrapartum fetal compromise / Características maternas, obstétricas e do Doppler fetal em uma população de alto risco: predição de desfechos perinatais adversos e de cesariana por comprometimento fetal intraparto

Abstract Objective: To evaluate the capacity of fetal Doppler, maternal, and obstetric characteristics for the prediction of cesarean section due to intrapartum fetal compromise (IFC), a 5-min Apgar score < 7, and an adverse perinatal outcome (APO), in a high-risk population. Materials and Methods: This was a prospective cohort study involving 613 singleton pregnant women, admitted for labor induction or at the beginning of spontaneous labor, who underwent Doppler ultrasound within the last 72 h before delivery. The outcome measures were cesarean section due to IFC, a 5-min Apgar score < 7, and any APO. Results: We found that maternal characteristics were neither associated with nor predictors of an APO. Abnormal umbilical artery (UA) resistance index (RI) and the need for intrauterine resuscitation were found to be significant risk factors for cesarean section due to IFC (p = 0.03 and p < 0.0001, respectively). A UA RI > the 95th percentile and a cerebroplacental ratio (CPR) < 0.98 were also found to be predictors of cesarean section due to IFC. Gestational age and a UA RI > 0.84 were found to be predictors of a 5-min Apgar score < 7 for newborns at < 29 and ≥ 29 weeks, respectively. The UA RI and CPR presented moderate accuracy in predicting an APO, with areas under the ROC curve of 0.76 and 0.72, respectively. Conclusion: A high UA RI appears to be a significant predictor of an APO. The CPR seems to be predictive of cesarean section due to IFC and of an APO in late preterm and term newborns.

Resumo Objetivo: Avaliar a capacidade do Doppler fetal e características materno-obstétricas na predição de cesariana por comprometimento fetal intraparto (CFI), índice de Apgar de 5º min < 7 e desfecho perinatal adverso (DPA) em uma população de alto risco. Materiais e Métodos: Estudo de coorte prospectivo envolvendo 613 parturientes admitidas para indução ou em início de trabalho de parto espontâneo que realizaram ultrassonografia Doppler nas 72 horas anteriores ao parto. Os desfechos foram cesariana por CFI, índice de Apgar de 5º min < 7 e DPA. Resultados: As características maternas não foram associadas nem preditoras de DPA. Índice de resistência (IR) da artéria umbilical anormal (p = 0,03) e necessidade de medidas de ressuscitação intrauterina (p < 0,0001) permaneceram como fatores de risco significativos para cesariana por CFI. IR AU > 95º e razão cerebroplacentária (RCP) < 0,98 foram preditores de cesariana. Idade gestacional e IR AU > 0,84 foram os preditores de índice de Apgar de 5º min < 7 para recém-nascidos < 29 e ≥ 29 semanas, respectivamente. IR AU e RCP apresentaram acurácia moderada na predição de DPA (área sob a curva ROC de 0,76 e 0,72, respectivamente). Conclusão: IR UA mostrou-se preditor significativo de DPA. RCP revelou-se possível preditora de cesariana por CFI e DPA em recémnascidos prematuros tardios e a termo.

Malformación arteriovenosa uterina como causa de hemorragia puerperal tardía / Uterine arteriovenous malformation as a cause of late puerperal hemorrhage

Resumen ANTECEDENTES: Las malformaciones arteriovenosas uterinas constituyen una causa infrecuente de hemorragia puerperal, en la bibliografía solo se encontraron 150 casos. Su conocimiento es importante porque son potencialmente mortales y porque se ha registrado un aumento en los últimos años. Suelen estar relacionadas con intervenciones en el útero: legrados, cesáreas o miomectomías o asociadas con neoplasias (enfermedad trofoblástica gestacional o adenocarcinoma endometrial), aunque otras son congénitas. CASO CLÍNICO: Paciente de 32 años, con una conización cervical y ablación de un mioma uterino mediante radiofrecuencia como únicos antecedentes de interés. A los 15 días posteriores a un parto eutócico, que fue el primero en su historial, tuvo un episodio de abundante metrorragia. En el puerperio inmediato tuvo una hemorragia abundante que requirió la transfusión de dos concentrados de hematíes. En la ecografía transvaginal el útero se observó de 22 x 44 mm, que podría corresponder a un cotiledón retenido. Ante la persistencia del sangrado se colocó un taponamiento intracavitario con una sonda de Foley con lo que se consiguió el cese del sangrado. Luego de descartar la embolización de las arterias uterinas debido al gran tamaño de la malformación arteriovenosa, se procedió a la histerectomía total simple por vía laparotómica. CONCLUSIÓN: Las malformaciones arteriovenosas uterinas, aunque son una causa infrecuente de hemorragia puerperal, deben ser sospechadas en virtud de ser potencialmente mortales.

Abstract BACKGROUND: Uterine arteriovenous malformations are a rare cause of puerperal hemorrhage, with only 150 cases reported in the literature. Their knowledge is important because they are life-threatening and because there has been an increase in recent years. They are usually related to interventions in the uterus: curettage, caesarean section or myomectomy or associated with neoplasms (gestational trophoblastic disease or endometrial adenocarcinoma), although others are congenital. CLINICAL CASE: A 32-year-old patient with a cervical conization and ablation of a uterine myoma by radiofrequency as the only history of interest. Fifteen days after a euthecological delivery, which was the first in her history, she had an episode of abundant metrorrhagia. In the immediate postpartum period, she had a heavy hemorrhage that required the transfusion of two red blood cell concentrates. Transvaginal ultrasound showed a uterus measuring 22 x 44 mm, which could correspond to a retained cotyledon. In view of the persistent bleeding, intracavitary tamponade was placed with a Foley catheter, which led to cessation of bleeding. After ruling out embolization of the uterine arteries due to the large size of the arteriovenous malformation, a simple total hysterectomy by laparotomy was performed. CONCLUSION: Uterine arteriovenous malformations, although an infrequent cause of puerperal hemorrhage, should be suspected because they are potentially fatal.

As artérias lenticuloestriadas podem interferir na extensão da ressecção tumoral e sobrevida nos gliomas da ínsula? / Can lenticulostriated arteries interfere with the extent of tumor resection and survival in insula gliomas?

Introdução: Os gliomas são tumores encefálicos e da medula espinhal que se originam nas células gliais e cuja progressão invade o tecido cerebral adjacentee e dentre eles um dos mais desafiadores são localizados no lobo cerebral da ínsula. Estas artérias irrigam estruturas nobres e sua lesão pode produzir danos sensitivos, motores e de linguagem. Objetivo: Descrever o impacto da extensão da ressecção, sobrevida global e dos resultados funcionais após a cirurgia dos gliomas insulares, quando estes tumores estejam ou não envolvidos pelas artérias lenticuloestriadas. Métodos: Revisão integrativa nas plataformas virtuais em português e inglês, buscando AND ou OR dados através dos seguintes descritores "Gliomas da ínsula, Mapeamento cerebral, Artérias lenticuloestriadas". A busca inicial foi baseada no título e/ou resumo. Decididos os trabalhos incluíveis foi realizada a leitura na íntegra dos textos. Ao total foram estudados 55 artigos. Resultados: O lobo da ínsula fica "escondido" pela sobreposição dos lobos frontal, parietal e temporal. Para alcançá-lo pode-se realizar as abordagens transsilviana ou transcortical. Ocorre que ao chegar na ínsula visualiza-se significativa ramificação constituída pelas artérias lenticuloestriadas, cuja manipulação pode determinar déficit neurológico e, ao se aprofundar no córtex insular, depara-se com outras estruturas tão importantes quanto a própria ínsula. O conhecimento anatômico das artérias lenticuloestriadas e suas relações é de fundamental importância para a ressecção de glioma insular, pois o comprometimento delas e da artéria cerebral média podem determinar a isquemia dos núcleos da base e da cápsula interna. Conclusão: O tratamento dos gliomas insulares permanece como grande desafio. Devido à sua localização e possibilidade de desenvolvimento de déficits neurológicos na manipulação cirúrgica é necessário não somente conhecer sua localização topográfica, mas também a íntima relação vascular com as artérias lenticuloestriadas. O envolvimento delas pelo tumor possui implicações na sobrevida e na preservação da função neurológica. O conhecimento detalhado da anatomia da região é fundamental para diminuir complicações que afetem grandemente a qualidade de vida dos pacientes.

Introduction: Gliomas are brain and spinal cord tumors that originate in glial cells and whose progression invades the adjacent brain tissue and among them one of the most challenging are located in the cerebral lobe of the insula. These arteries supply noble structures and their damage can cause sensory, motor and language damage. Objective: To describe the impact of the extent of resection, overall survival and functional results after surgery for insular gliomas, when these tumors are or are not involved by lenticulostriate arteries. Methods: Integrative review on virtual platforms in Portuguese and English, searching for AND or OR data using the following descriptors "Insula gliomas, Brain mapping, Lenticulostriate arteries". The initial search was based on the title and/or abstract. Once the included works were decided, the texts were read in full. In total, 55 articles were studied. Results: The insula lobe is "hidden" by the overlap of the frontal, parietal and temporal lobes. To achieve this, transsylvian or transcortical approaches can be performed. It turns out that when arriving at the insula, a significant branch made up of lenticulostriate arteries is seen, the manipulation of which can cause neurological deficits and, when going deeper into the insular cortex, one comes across other structures as important as the insula itself. Anatomical knowledge of the lenticulostriate arteries and their relationships is of fundamental importance for the resection of insular glioma, as their involvement and that of the middle cerebral artery can determine ischemia of the basal ganglia and internal capsule. Conclusion: The treatment of insular gliomas remains a major challenge. Due to its location and the possibility of developing neurological deficits during surgical manipulation, it is necessary not only to know its topographic location, but also the intimate vascular relationship with the lenticulostriate arteries. Their involvement by the tumor has implications for survival and preservation of neurological function. Detailed knowledge of the region's anatomy is essential to reduce complications that greatly affect patients' quality of life.

Pós-processamento da mediana de escala de cinza (GSM), posterização e remapeamento de cores para ultrassonografia de carótidas / Grayscale median (GSM) post-processing, posterizing, and color mapping for carotid ultrasound

Resumo Fatores relativos à placa aterosclerótica podem indicar instabilidade como ulcerações, hemorragias intraplaca, núcleo lipídico, capa fibrosa delgada ou irregular e inflamação. A mediana de escala de cinza (GSM, de greyscale median) da placa é um dos métodos mais difundidos de estudo da placa aterosclerótica; nesse sentido, é importante criar uma padronização da pós-processamento de forma compreensível. O pós-processamento foi realizado no software Photoshop 23.1.1. A padronização da imagem foi alcançada com o ajuste de curvas do histograma de escalas de cinza definindo o ponto mais escuro do lúmen vascular (sangue) para zero e a adventícia distal para 190. A posterização e o remapeamento de cores foram realizados. Um método que apresenta o atual estado da arte da técnica de forma acessível e ilustrativa pode contribuir para disseminação da análise de GSM. Neste artigo, esse processo é demonstrado passo a passo.

Abstract Factors related to atherosclerotic plaques may indicate instability, such as ulcerations, intraplaque hemorrhages, lipid core, thin or irregular fibrous cap, and inflammation. The grayscale median (GSM) value is one of the most widespread methods of studying atherosclerotic plaques and it is therefore important to comprehensively standardize image post-processing. Post-processing was performed using Photoshop 23.1.1.202. Images were standardized by adjusting the grayscale histogram curves, setting the darkest point of the vascular lumen (blood) to zero and the distal adventitia to 190. Posterization and color mapping were performed. A methodology that presents the current state of the art in an accessible and illustrative way should contribute to the dissemination of GSM analysis. This article describes and illustrates the process step by step.

Indicações para ecodoppler de carótidas em pacientes assintomáticos - estamos solicitando corretamente? / Indications for carotid Doppler ultrasound in asymptomatic patients - are we ordering it correctly?

Resumo Contexto Artérias carótidas são locais de frequentes patologias, sendo a mais comum a aterosclerose, podendo resultar na formação de placas com estenose. Para avaliarmos as carótidas em pacientes assintomáticos, o método de ultrassonografia Doppler ou ecodoppler é, atualmente, o exame de eleição, indicado para a triagem e o diagnóstico de lesões vasculares. As diretrizes atuais recomendam o rastreamento em pacientes que apresentem fatores de risco para estenose carotídea e que estejam aptos e dispostos ao tratamento medicamentoso/intervenção carotídea. A triagem em pacientes assintomáticos na população adulta em geral e sem fatores de risco significativos não é recomendada. Objetivos Avaliar se os especialistas médicos se baseiam na literatura para solicitar o ecodoppler como screening. Métodos Realizou-se seleção retrospectiva dos pacientes a partir da solicitação de ecodoppler. Os dados coletados foram computados e analisados com o programa RStudio versão 1.3.959. Resultados Avaliou-se a solicitação como adequada, desde que os pacientes apresentassem pelo menos um fator de risco para placas carotídeas. Entre 152 pacientes, 55 preenchiam critérios para screening de carótidas, a principal indicação na população estudada foi o check-up vascular. Hipertensão arterial foi o fator de risco mais prevalente. Os especialistas em cirurgia vascular obtiveram êxito maior ao solicitar o exame de maneira adequada [razão de chances de indicações corretas de 3,52 (IC 1,14-10,87), com p = 0,02]. A assertividade nas indicações de ecodoppler foi de 36% (IC95% 29-42%). Conclusões Conclui-se que houve excesso de solicitação de ultrassonografia de carótidas como screening. Os cirurgiões vasculares solicitaram o exame de maneira mais assertiva.

Abstract Background Carotid arteries are frequently the site of pathologies, the most common being atherosclerosis, which may result in the formation of plaques, causing stenosis. Doppler ultrasound is currently the exam of choice for assessment of the carotid arteries in asymptomatic patients to screen for and diagnose vascular lesions. Current guidelines recommend screening patients who have risk factors for carotid stenosis and who are able and willing to undergo medical treatment and/or carotid intervention. Screening asymptomatic patients in the general adult population who have no significant risk factors is not recommended. Objectives To assess whether medical experts rely on the literature to request Doppler ultrasound for screening. Methods A retrospective selection of patients was performed based on requests for carotid ultrasound. The data collected were computed and analyzed using RStudio version 1.3.959. Results The request was evaluated as appropriate as long as the patients presented at least one risk factor for carotid plaques. Fifty-five out of 152 patients met criteria for carotid screening. The most frequent indication in the study population was vascular check-up. Arterial hypertension was the most prevalent risk factor. Vascular surgery specialists were more likely to order the exam correctly (odds ratio for correct indications: 3.52 [CI 1.14 - 10.87], with p=0.02). The rate of correct Doppler ultrasound requests was 36% (95%CI 29 to 42%). Conclusions An excess of requests for carotid ultrasound screening was found in this study. Vascular surgeons more often requested the test correctly.