Research Progress in Diagnostic Reference Levels in Interventional Radiology / 中国医学科学院学报

During interventional procedures,subjects are exposed to direct and scattered X-rays.Establishing diagnostic reference levels is an ideal way to optimize the radiation dose and reduce radiation hazard.In recent years,diagnostic reference levels in interventional radiology have been established in different countries.However,because of the too many indicators for characterizing the radiation dose,the indicators used to establish diagnostic reference levels vary in different countries.The research achievements in this field remain to be reviewed.We carried out a retrospective analysis of the definition,establishment method,application,and main factors influencing the dose difference of the diagnostic reference level,aiming to provide a basis for establishing the diagnostic reference level for interventional procedures in China.

Bloqueio do Nervo Hipogástrico Superior (BNHS) para o manejo da dor após Embolização de Artérias Uterinas (EAU): revisão de literatura / Superior Hypogastric Nerve Block (SHNB) for pain management in Uterine Artery Embolization (UAE): a literature review

Introdução: a embolização de artérias uterinas (EAU) é uma opção terapêutica no tratamento de miomas uterinos sintomáticos; todavia, a dor pós-procedimento representa um grande desafio para essa técnica. Nesse contexto, o Bloqueio do Nervo Hipogástrico Superior (BNHS), já utilizado no tratamento de dor pélvica crônica associada à malignidade, apresenta-se como opção de intervenção intraprocedimento para melhorar a recuperação das pacientes e fomentar o uso da EAU na prática clínica. Objetivo: realizar uma revisão integrativa da literatura disponível sobre o BNHS no manejo de dor pós EAU. Métodos: bases de dados PubMed, The Cochrane Library, Lilacs e Medline foram avaliadas a partir da combinação dos termos "uterine artery embolization", "pain" e "superior hypogastric block". Foram incluídos estudos clínicos, disponíveis em texto completo, com pacientes adultas, submetidas à EAU, cujo objetivo era avaliar o uso do BNHS e seu impacto na dor pós-procedimento. Foram excluídos artigos de revisão, carta ao editor, e publicação em anais de congresso. Resultados: 8 artigos, em maior parte retrospectivos, indicaram consistência do BNHS em termos de sucesso terapêutico a curto prazo e redução da dor. Apenas uma complicação foi relatada, e evoluiu de forma satisfatória. Conclusões: BNHS tem potencial de aprimorar o manejo da dor após EAU, podendo impactar positivamente no tempo e na qualidade da recuperação, com redução da dor e consumo de opiodes no período pós-operatório. Esses benefícios valorizam o procedimento de embolização como uma alternativa a ser considerada no tratamento de leiomiomas sintomáticos para mulheres candidatas à preservação uterina.

Introduction: Uterine Artery Embolization (UAE) is a therapeutic option in the treatment of symptomatic uterine fibroids; however, post-procedure pain imposes as a great challenge in this technique. In this context, the Superior Hypogastric Nerve Block (SHNB), already used in the treatment of chronic pelvic pain associated with malignancy, presents itself as an option for intraprocedural intervention, to improve patients' recovery and to promote UAE in the clinical setting. Objective: to perform an integrative literature review about the effectiveness of SHNB in pain management after UAE. Methods: databases PubMed, The Cochrane Library, Lilacs and Medline were assessed using the combination of the terms "uterine artery embolization", "pain" and "superior hypogastric block". Clinical studies were included once available in full text, with adult patients submitted to UAE, whose objective was to evaluate the use of SHNB and its impact in post-procedure pain. Review articles, letters to the editor, and publication in conference proceedings were excluded. Results: 8 articles were found, most of them retrospective, indicated SHNB's consistency in terms of short-term therapeutic success and pain reduction. The single reported complication evolved satisfactorily. Conclusions: SHNB has the potential to improve pain management after UAE, which can positively impact recovery time and quality, with reduced pain and consumption of opioids in the postoperative period. Benefits like these can enhance the embolization procedure as an alternative to be considered for the treatment of symptomatic fibroids for women candidates for uterine preservation.

Optimización de la protección en radiología y cardiología intervencionista pediatrica en América Latina y el Caribe (OPRIPALC) / Optimization of protection in pediatric interventional cardiology and radiology in Latin America and the Caribbean (OPRIPALC)

El objetivo del presente artículo ha sido describir el programa "Optimización de la Protección en Radiología Intervencionista Pediátrica en América Latina y el Caribe" (OPRIPALC) que nace el año 2018 como respuesta conjunta de la Organización Panamericana de la Salud y la Organización Mundial de la Salud, en cooperación con el Organismo Internacional de Energía Atómica, para colaborar con sus Estados miembros en asegurar que las exposiciones a la radiación de los pacientes pediátricos sean las mínimas necesarias durante los procedimientos intervencionistas. Actualmente, hay 18 centros de los siguientes 10 países que participan: Argentina, Brasil, Chile, Colombia, Costa Rica, Cuba, Ecuador, México, Perú y Uruguay. Para el desarrollo del programa se plantean una serie de objetivos, productos, actividades y resultados esperados. La puesta en marcha de la WEB de OPRIPALC ha significado un instrumento muy válido para seguir la información actualizada del programa. Un programa actualizado de formación en radioprotección para los profesionales implicados en el programa, se está realizando por medio de "webinars". Se deberá seguir actuando en la aplicación del programa de control de calidad básico para los equipos de rayos X participantes y validar los valores de los Niveles de Referencia para Diagnóstico (NRDs). Se propone formar un equipo de trabajo entre los Físicos Médicos y Tecnólogos Médicos participantes de OPRIPALC para implicarse en las pruebas de control básicas que todos los centros debieran realizar. Se han presentado algunos resultados iniciales de OPRIPALC en eventos científicos internacionales. Se está avanzando en proponer unos primeros valores sobre NRDs en procedimientos de intervencionismo cardiológico pediátrico por bandas de edad y peso. OPRIPALC es una de las pocas iniciativas de carácter regional para obtener valores de NRDs en procedimientos intervencionistas pediátricos. Se espera que tanto los valores de referencia como la metodología empleada en OPRIPALC, puedan ser utilizados en otras regiones del mundo.

The objective of this article has been to describe the program "Optimization of Protection in Pediatric Interventional Radiology in Latin America and the Caribbean" (OPRIPALC) that was born in 2018 as a joint response of the Pan American Health Organization and the World Organization of the Health, in cooperation with the International Atomic Energy Agency, to collaborate with its member states in ensuring that radiation exposures of pediatric patients are the minimum necessary during interventional procedures. Currently, there are 18 centers from the following 10 countries participating: Argentina, Brazil, Chile, Colombia, Costa Rica, Cuba, Ecuador, Mexico, Peru and Uruguay. For the development of the program, a series of objectives, products, activities and expected results are proposed. The launch of the OPRIPALC WEBSITE has been a very valid instrument for following up-to-date information on the program. An updated training program in radiation protection for the professionals involved in the program is being carried out through webinars. It should continue acting in the application of the basic quality control program for the participating X-ray equipment and validate the values of the Diagnostic Reference Levels (DRLs). It is proposed to form a work team among the OPRIPALC participating medical physicists to get involved in the basic control tests that all centers should carry out. Some initial results of OPRIPALC have been presented at international scientific events. Progress is being made in proposing first values on DRLs in pediatric cardiac intervention procedures by age and weight bands. OPRIPALC is one of the few regional initiatives to obtain DRLs values in pediatric interventional procedures. It is expected that both the reference values and the methodology used in OPRIPALC can be used in other regions of the world.

New infusion device for use in acquisition of images during endovascular procedures: an experimental model / Novo dispositivo de infusão para a aquisição de imagens durante procedimentos endovasculares: modelo experimental

Abstract Background The contrast power injector (CPI) is the gold standard method for injecting contrast with the pressure and flow needed to generate a satisfactory images during endovascular procedures, but it is an expensive tool, narrowing its wide-scale applications. One alternative is the manual injection (MI) method, but this does not generate the pressure required for adequate visualization of anatomy. It is therefore imperative to create an alternative low-cost method that is capable of producing high quality images. Objectives To compare the injection parameters of a new mechanical device (Hand-Crank) created in a university hospital with the MI method and with the contrast power injector's ideal values. Methods A circulation phantom was constructed to simulate the pressure in the aorto-iliac territory and the injection parameters of the two methods were compared in a laboratory setting. Student's t test and the Mann-Whitney test were used for statistical analysis. Three vascular surgery residents (the authors) performed the injections (each performed 9 tests using conventional manual injection and 9 tests using the Hand-Crank, totaling 54 injections). Results There were statistical differences between the two methods (p<0.05) in total volume injected until maximum pressure was attained, pressure variation, maximum pressure, total injection time, and time to reach the maximum pressure. Conclusions The Hand-Crank can achieve higher maximum pressure, higher average flow, and lower injection time than the manual method. It is a simple, low-cost, and effective tool for enhancing injection parameters in an experimental setup. It could help to produce higher quality images in a clinical scenario.

Resumo Contexto A bomba injetora é o método padrão-ouro para a injeção de contraste em aortografias. Entretanto, é uma ferramenta de alto custo, o que limita o seu uso. A injeção manual surge como alternativa, mas a pressão gerada com esse método é baixa, e, por isso, a qualidade das imagens não é usualmente satisfatória. Assim, a criação de um método de baixo custo capaz de gerar imagens de qualidade é imperativo. Objetivos Comparar os parâmetros de injeção de um novo dispositivo mecânico (manivela articulada) criado em um hospital universitário com os parâmetros da injeção manual e com os valores ideais da bomba injetora. Métodos Um simulador do território aórtico foi construído, e parâmetros de injeção entre os diferentes métodos em um cenário laboratorial controlado foram analisados. O teste t de Student e o teste de Mann-Whitney foram usados para análise estatística. Três residentes de Cirurgia Vascular realizaram os testes (nove usando o novo dispositivo, e nove usando a injeção manual, totalizando 54 injeções). Resultados Houve diferença estatisticamente significativa (p < 0,05) entre os dois métodos, considerando os parâmetros: variação de pressão, pressão máxima, tempo de injeção, tempo até a pressão máxima e volume até a pressão máxima. Conclusões A manivela articulada atingiu níveis superiores de pressão e de velocidade de injeção, com menor tempo de injeção do que a injeção manual. É um dispositivo simples, de baixo custo e com resultados comparáveis à bomba injetora, o que sugere seu uso potencial na geração de imagens satisfatórias em aortografias.

Comparación de la dosis recibida por personal ocupacionalmente expuesto en intervencionismo / Comparison of the received dose by occupationally exposed personnel in interventionism

El objetivo de esta investigación fue determinar la relación entre la dosis de radiación recibida y la práctica en intervención médica. Se estudiaron estadísticamente los reportes dosimétricos de profesionales que han laborado en intervencionismo con un Arco en C en el Hospital José Carrasco Arteaga de la ciudad de Cuenca, Ecuador. Estos informes se basan en lecturas bimensuales de los dosímetros TLD utilizados por el personal para seguridad radiológica. En total, se analizaron 124 personas que trabajaron en el período de noviembre de 2013 a marzo de 2018, es decir, 24 informes. La dosis promedio anual para las enfermeras de quirófanos es de 1,32 mSv, 1,59 mSv para el personal de Urología, 1,74 mSv para el personal de Gastroenterología, 1,78 mSv para el personal de Hemodinamia y 2,33 mSv para el personal de Traumatología. Se concluyó que la dosis promedio para cada práctica no excede la dosis de restricción de 1/3 de la dosis permitida para trabajadores ocupacionalmente expuestos. Intervencionismo en Traumatología resulta ser la práctica con mayor dosis recibida y la más baja perteneció al personal de Enfermería de Quirófanos. Estos resultados son de gran utilidad para saber qué nivel va acorde con cada práctica médica.

The objective of this research was to determine the relationship between the radiation dose received and the practice in medical intervention. The dosimetric reports of professionals who have worked in intervention with a C-Arm at the José Carrasco Arteaga Hospital in the city of Cuenca, Ecuador, were studied statistically. These reports are based on bi-monthly readings of the TLD dosimeters used by the staff for radiological safety. In total, 124 professionals who worked in the period from November 2013 to March 2018 were analyzed, that is, 24 reports. The average annual dose for operating room nurses is 1.32 mSv, 1.59 mSv for urology staff, 1.74 mSv for gastroenterology staff, 1.78 mSv for hemodynamic staff and 2.33 mSv for trauma staff. It is concluded that the average dose for each practice does not exceed the restriction dose of 1/3 of the dose allowed for occupationally exposed workers. Traumatology is the practice with the highest dose received and the lowest belongs to the operating room nursing staff. These results are very useful to know which level is consistent with each medical practice.

Role of endoscopic treatment or balloon-occluded retrograde transvenous obliteration in patients with Child-Pugh class C end-stage liver cirrhosis and esophageal/gastric varices

No abstract available.

Spontaneous hepatic haemangioma rupture and hemoperitoneum: a double problem with a single stage interventional radiology solution

Hepatic haemangioma is a congenital vascular malformation, considered the most common benign mesenchymal hepatic tumour. Spontaneous or traumatic rupture is the most severe complication. In case of rupture, surgical resection and enucleation, as a single therapy or after trans-arterial embolization are considered the treatments of choice. We report a case of spontaneous rupture of a hepatic haemangioma with massive hemoperitoneum successfully treated by percutaneous hepatic trans-arterial embolization and pelvic drainage alone.

Qualité des demandes d'examens radiologiques: à propos de 552 demandes évaluées par des radiologues

Objectifs : Evaluer la qualité des demandes d'examens radiologiques. Matériels et méthodes : Il s'est agi d'une étude transversale descriptive réalisée dans le service de radiologie du CHU Campus du 1er août au 15 août 2015. Résultats : Au cours de la période d'étude, nous avons colligé 144 demandes d'examens de tomodensitométrie (26,1%) et 408 demandes d'examens de radiographie (73,9%). Les demandeurs étaient des médecins spécialistes dans 25% des cas (102 examens) pour la radiographie et 19,4% des cas (28 examens) pour la tomodensitométrie. Les demandeurs d'examen de radiographie étaient des rhumatologues dans 8,8% des cas (36 examens) et aucun urologue n'avait demandé un examen de radiographie ; les demandeurs d'examen de tomodensitométrie étaient des neurologues dans 19,4% des cas (28 examens) et aucun gynécologue ni pédiatre n'avait demandé un examen de tomodensitométrie. Les demandes sans question et les demandes sans retour étaient les deux principaux types de demandes observés. L'âge et le sexe des patients n'avaient pas été précisés respectivement dans 4,4% (18 cas) et 2,9% (12 cas) des demandes d'examen de radiographie. Les résultats d'examens para-cliniques pouvant être utiles à l'interprétation et au compte-rendu radiologique manquaient sur 384 cas (94,1%) des demandes d'examens de radiographie et sur 140 cas (97,2 %) des demandes d'examens de tomodensitométrie. Sur les demandes d'examen de radiographie, le demandeur ne pouvait être identifié par son nom dans 78 cas (19,1%) et le motif de demande était précisé dans 402 cas (98,5 %) ; sur les demandes d'examen de tomodensitométrie, le demandeur ne pouvait être identifié par un numéro de téléphone dans 96 cas (66,7%). Conclusion : Les demandes d'examen radiologiques sont établies de manière incomplète. L'exercice radiologique suppose cependant une obligation de moyens, avec sérieux, prudence et réflexion

Diagnóstico y Tratamiento de Tromboembolismo Pulmonar Masivo Mediante Trombectomía Mecánica. Reporte de un caso / Diagnosis and Treatment of Massive Pulmonary Embolism by Means of Mechanical Thrombectomy. Case Report

El Tromboembolismo pulmonar puede considerarse una de las complicaciones más graves en Medic ina. Consiste en la obstrucción de una arteria pulmonar, usualmente secundaria a un trombo. Esta obstrucción condiciona una disminución de la perfusión sanguínea a los alveolos, lo que lleva a la disminución de la oxigenación sanguínea corporal. Entre los síntomas más comunes, podemos obs erv ar disnea, dolor torácico y los signos más comunes son la disminución de la saturación de ox igeno, la taquipnea y la taquicardia. Con las mejoras tecnológicas y las mejoras en la precisión diagnóstica, la tomografía computada se ha convertido en el estudio de elección es pecíficamente, la Angiotomografía de Tórax.

Pulmonary Thromboembolism can be considered one of Medicine's most severe complications. It cons ists in the obstruction of a pulmonary artery, usually caused by a thrombus. This obstruction caus es a reduction of blood flow to the alveoli which consequently diminishes blood oxygenation for the rest of the body. The most common symptoms seen are dyspnea, thoracic pain and the most common clinical signs are tachycardia, tachypnea and a reduction in blood saturation. With the adv ances in technology and the improvements in diagnostic precision, Computed Tomography has become today's gold standard, specifically Computed Angiotomography.

Novel Non-Surgical Interventions for Benign Inflammatory Biliary Strictures in Infants: A Report of Two Cases and Review of Current Pediatric Literature / 대한소아소화기영양학회지

Benign biliary strictures are uncommon in children. Classically, these cases are managed surgically, however less invasive approaches with interventional radiology and or endoscopy may have similar results and improved safety profiles While benign biliary strictures have been described in literature on several occasions in young children, (most older than 1 year and once in an infant 3 months of age), all reported cases were managed surgically. We present two cases of benign biliary strictures in infants less than 6 months of age that were managed successfully with novel non-invasive procedures and a review of all current pediatric cases reported in the literature. Furthermore, we describe the use of a Rendezvous procedure, which has not been reported as a treatment approach for benign biliary strictures.

Endovascular Closure Resolves Trimethylaminuria Caused by Congenital Portosystemic Shunts / 대한소아소화기영양학회지

This study aimed to report three new cases of an association between two rare conditions, congenital portosystemic shunts (CPSS) and trimethylaminuria (TMAU), and the efficacy of endovascular closure of the CPSS for resolving TMAU. Between November 2014 and April 2017, 15 patients with CPSS were enrolled in this prospective study to assess the efficacy of percutaneous endovascular shunt closure. Three patients presented with clinical symptoms of TMAU that were confirmed by urine analysis of trimethylamine (TMA) and TMA n-oxide. One year after endovascular closure of the congenital portosystemic shunt, the same parameters were evaluated were obtained and the values were compared to the pretreatment values. The results indicated the disappearance of clinical symptoms of TMAU and normalization of the urine test parameters in two patients and no changes in one patient, who developed new portosystemic communications.

Experiencia de embolización de malformaciones arterio-venosas cerebrales en Hospital de Especialidades Carlos Andrade Marín, 2016-2017 / Experience of embolization of cerebral arteriovenous malformations in Carlos Andrade Marín Specialties Hospital, 2016-2017

INTRODUCCIÓN. La morbimortalidad de las malformaciones arterio-venosas cerebrales se encuentra dada principalmente por hemorragias. OBJETIVO. Conocer la situación de la embolización de malformaciones arterio-venosas en el Hospital de Especialidades Carlos Andrade Marín. MATERIALES Y MÉTODOS. Estudio observacional, retrospectivo en pacientes con diagnóstico de malformaciones arterio-venosas cerebral que fueron sometidos a intervención radiológica, durante el período de enero 2016 a diciembre 2017, en el Hospital de Especialidades Carlos Andrade Marín. RESULTADOS. 17 pacientes con criterios de inclusión, la mayoría con malformaciones arterio-venosas única y clasificación Spetzler Martin tipo I y II. El 52,9% fue sometido al procedimiento con antecedente de hemorragia intracerebral. Luego del procedimiento se alcanzó el 61,5% de obliteración en promedio, con 5,8% de pacientes que tuvo hemorragia intracerebral postprocedimiento. DISCUSIÓN. El uso de la embolización permite la oclusión del nido vascular displásico y del flujo de arterias nutricias profundas, disminuyendo la hemorragia intracerebral como complicación, siendo un tratamiento precursor de complementos quirúrgicos o como tratamiento único. El promedio de obliteración se encuentra dentro del rango reportado en la literatura, con un solo caso que tuvo complicación post procedimiento. Son necesarios estudios complementarios donde se especifiquen las variables de los tratamientos post procedimiento y un seguimiento para valorar supervivencia. CONCLUSIÓN. Resultados similares a los reportados en la literatura, se consideró la embolización como una alternativa del tratamiento, principalmente como precursor a la cirugía en malformaciones arterio-venosas con clasificación Spetzler Martin mayor a III.

INTRODUCTION. The morbidity and mortality of cerebral arteriovenous malformations is mainly due to hemorrhages. OBJECTIVE. To know the situation of the embolization of arterio-venous malformations in the Carlos Andrade Marín Specialties Hospital. MATERIALS AND METHODS. Observational, retrospective study in patients with a diagnosis of cerebral arteriovenous malformations who underwent radiological intervention, during the period from January 2016 to December 2017, at the Carlos Andrade Marín Specialties Hospital. RESULTS 17 patients with inclusion criteria, most with single arteriovenous malformations and Spetzler Martin type I and II classification. 52,9% underwent the procedure with a history of intracerebral hemorrhage. After the procedure, 61,5% of obliteration was achieved on average, with 5,8% of patients having post-procedural intracerebral hemorrhage. DISCUSSION. The use of embolization allows the occlusion of the dysplastic vascular nest and the flow of deep nutritional arteries, decreasing intracerebral hemorrhage as a complication, being a precursor treatment of surgical complements or as a single treatment. The average of obliteration is within the range reported in the literature, with only one case that had post procedure complication. Complementary studies are needed where the variables of the post-procedure treatments and a follow-up to assess survival are specified. CONCLUSION. Results similar to those reported in the literature, embolization was considered as an alternative treatment, mainly as a precursor to surgery in arteriovenous malformations with Spetzler Martin classification greater than III.

Punción percutánea transtorácica con aguja gruesa: complicaciones y factores de riesgo inherentes al paciente / Imaging-guided Chest Biopsies with Thick Needle: Complications and Risk Factors Inherent to the Patient

Objetivo Determinar la incidencia de complicaciones con el uso de una aguja gruesa (semiautomática Trucut 18), para punción pulmonar y realizar un análisis exploratorio de las variables inherentes al paciente que probablemente puedan tener relación con el desarrollo de complicaciones. Materiales y Métodos Estudio retrospectivo de una serie de casos de pacientes sometidos a punción percutánea transtorácica (PPT) con aguja gruesa y guiada por tomografía computada (TC) para el estudio de lesiones pulmonares; se realizó un análisis univariado. Resultados Se realizaron 26 punciones, la tasa de incidencia de complicaciones fue del 38,46% en 1 año; los pacientes presentaron: neumotórax leve (n » 7), neumotórax moderado (n » 3) y hemorragia alveolar difusa (n » 1). El análisis estadístico univariado mostró una diferencia estadísticamente significativa en la edad de los pacientes que presentaron complicaciones v/s los pacientes que no presentaron complicaciones (61,18 þ/- 3,6 versus 75,1 þ/- 2,46 años, p » 0,0107). Conclusión La PPT-TC es un procedimiento con una tasa considerable de complicaciones no severas; en nuestra serie de casos, la edad fue la variable que se asoció con mayor fuerza al probable desarrollo de complicaciones.

Objective Establish the incidence of complications with the use of thick needle (Trucut 18) for pulmonary puncture and perform an exploratory analysis of the inherent variables to the patient that may be related to complication development. Materials and Methods Retrospective study of a case series of patients undergoing transthoracic percutaneous puncture (PPT) with thick needle,guided by computed tomography (CT) for the study of pulmonary lesions; a univariate and multivariate analysis was performed. Results 26 punctures were performed, the incidence rate of complications was 38.46% in 1 year: patients presented: mild pneumothorax (n » 7), moderate pneumothorax (n » 3) and diffuse alveolar hemorrhage (n » 1). The univariate statistical analysis showed a statistically significant difference in the age of the patients who presented complications v/s patients who did not present complications (61.18 þ/- 3.6 versus 75.1 þ/- 2.46 years, p » 0.0107). Conclusion PPT-CT is a procedure with a considerable rate of non-severe complications; in our case series, age was the variable that was most strongly associated with the probable development of complications.

Fusión de ecocardiografía 2D/3D-fluoroscopia: nueva herramienta en el intervencionismo cardiaco / Fusion of 2 D and 3 D echocardiography with fluoroscopy: a new tool in cardiac interventionism

Resumen La evolución en el intervencionismo estructural percutáneo ha generado un desarrollo paralelo en las técnicas de imagen avanzada. Teniendo en cuenta que este tipo de procedimientos requiere un entendimiento total de la anatomía cardiaca y con el fin de garantizar los mejores resultados y seguridad para el paciente durante procedimientos complejos, se desarrolló un software capaz de fusionar la fluoroscopia y la ecocardiografía 3 D en una sola imagen. La tecnología del Echonavigator® integra dos técnicas de imágenes dinámicas de un corazón en movimiento; el adecuado co-registro y visualización de fluoroscopia y ecocardiografía transesofágica 2D/3D es la clave en la obtención de resultados óptimos. La fusión de dos imágenes dinámicas en tiempo real es una herramienta factible y segura en los procedimientos de intervencionismo estructural del corazón; los estudios iniciales han logrado disminuir el tiempo de realización de los procedimientos y las dosis de radiación al paciente. El futuro es prometedor y su progresiva expansión de uso teniendo en cuenta su reciente aparición, aportará más datos en el crecimiento de esta tecnología.

Abstract The evolution of percutaneous structural interventionism has led to the simultaneous development of advanced imaging techniques. Taking into account that these types of procedures require a full understanding of cardiac anatomy, and with the aim of ensuring the best results and patient safety during complex procedures, a software program was developed that was capable of fusing and 3D-echocardiography into a single image. The Echonavigator® technology combines two dynamic imaging techniques of a heart in movement. The appropriate co-recording and visualising of fluoroscopy and 2D/3D transoesophageal echocardiography is essential for obtaining optimal results. The fusion of two images in real-time is a feasible and safe tool in structural heart interventionist procedures. Initial studies have managed to decrease the time of performing the procedures, as well as the dose of radiation to the patient. The future is promising, and its gradual expansion of use, taking into account its recent appearance, will provide more data on the growth of this technology.

The vanishing stent: Repeated fracture and dissolution of nitinol gastric stents in a long term cancer survivor

Nitinol self expandable metal stents are increasingly utilised for malignant obstruction in the proximal gastrointestinal tract. We describe a case in which repeated fracture of proximal duodenal stents with dissolution of the nitinol wire skeleton and covering membranes occurred in a long term cancer survivor. This necessitated placement of 4 stents for symptom control and to allow oral feeding until the patient's death 20 months after the initial stent was inserted. Fracture of gastric and duodenal stents has rarely been described previously, some incidences of which were considered due to mechanical causes. Dissolution of stent metal skeletons has not previously been recognised in gastroduodenal stents but has been described in an oesophageal stent subject to reflux of gastric content and a biochemical mechanism has been proposed. With modern oncological treatment the prospect of patients outliving their stents is increasing and the need for repeat procedures should form part of the consent process.

Portosystemic collateral pathways and interventions in portal hypertension

Pathologic increase in portal pressure can be caused by increased resistance to blood flow at the level of the portal vein (pre-hepatic), hepatic sinusoids (hepatic) or hepatovenous outflow (post-hepatic). This results in recruitment and dilatation of tiny portosystemic collateral pathways, diverting portal venous blood flow to low pressure systemic veins. Based on the location of the causative factor of portal venous resistance, different collateral pathways and shunts may develop, resulting in unique syndromes of portal hypertension and in-turn requiring unique treatment options. Knowledge of the common and less-common portosystemic collateral pathways have important implication for clinicians and interventionalists. The objective of this pictorial review is to illustrate the various collateral pathways using diagrammatic and conventional non-invasive and invasive radiologic examples. Additionally, we will briefly address minimally invasive interventional techniques used to treat the sequelae of portal hypertension.

Iatrogenic common carotid artery rupture during neck surgery rescued using covered stent: A case report

Carotid artery rupture during head and neck surgery is a catastrophic, life-threatening emergency. Although recent incidence has declined, it still occurs in many patients. Hemorrhage from the carotid artery is usually massive and uncontrollable. Fast, aggressive treatment to prevent hemodynamic instability is required. Even if patients survive this event, they may experience severe neurological sequelae. A ruptured carotid artery is usually controlled by direct compression and arterial ligation. However, apart from the inherent difficulty of operation, these traditional surgical treatments are associated with high morbidity and mortality. In the past two decades, endovascular management has become a mainstay of carotid rupture treatment. We report a case of successful recovery without any sequelae after cardiovascular collapse due to an unintentional common carotid artery (CCA) rupture during neck surgery. The exposed CCA was treated with a covered stent. In such a case, multidisciplinary cooperation is crucial.

Towards More Readable and Citable Journal / 신경중재치료의학

No abstract available.

Valoración de la respuesta plaquetaria al uso de antagonistas del receptor p2y12 utilizando el test de reactividad plaquetaria verifynow®, en pacientes sometidos a neurointervencionismo / Monitoring the Plaquetary Response to the Use of P2Y12 Receptor Antagonists Using the Platelet Reactivity Test Verifynow™ in Patients Who Underwent Neurointervencionism Procedures

Objetivo: Valorar la respuesta plaquetaria al uso de los antagonistas del receptor P2Y12 mediante el test VerifyNow® en pacientes sometidos a neurointervencionismo. Metodología: Estudio descriptivo transversal retrospectivo, con 89 pacientes intervenidos entre 2014 y 2017, de los cuales, 78 cumplieron los criterios de inclusión. Todos los casos recibieron protocolo de antiagregación dual. El resultado por evaluar con el test corresponde a la respuesta de los pacientes al uso de antagonistas del receptor P2Y12. La respuesta baja a los inhibidores de P2Y12 se manifestó en aquellos con un valor de PRU > de 240; la respuesta alta se les atribuyó a aquellos con valores de PRU < 60. Resultados: La mayor parte de los intervenidos (69,2 %) respondieron normalmente. Las complicaciones de la población en estudio fueron del 9,1 %, incluidos 2 fallecimientos, de los cuales, uno fue de un paciente de baja respuesta. Conclusiones: La respuesta plaquetaria individual de la población estudiada frente al uso de clopidogrel mediante el test VerifyNow® fue variable y heterogénea. Se evidenció en el estudio que el 14,3 % de los pacientes que tuvieron complicaciones tenían el PRU fuera del rango objetivo y del total de pacientes que presentaron valores dentro del rango objetivo solo el 2 % presentaron complicaciones menores.