Conduta obstétrica em caso de hipoplasia materna da veia cava inferior / Obstetric management in case of the maternal inferior vena cava hypoplasia

A hipoplasia da veia cava inferior é uma patologia rara que integra o conjunto de anomalias do desenvolvimento da veia cava inferior. A sua incidência situa-se entre 0,3%-0,5% na população saudável e 5% nos adultos jovens sem fatores de risco para trombose venosa profunda, sendo considerada um importante fator de risco para o desenvolvimento de trombose dos membros inferiores. O principal objetivo deste trabalho é reportar a conduta obstétrica de um caso clínico de uma grávida diagnosticada com hipoplasia da veia cava inferior, prévia à gravidez. Trata-se de um caso clínico, de uma grávida, primigesta, com 37 anos, com hipoplasia da veia cava inferior e heterozigotia para o gene MTHFR677 diagnosticadas, na sequência de uma trombose venosa bilateral dos membros inferiores e do segmento infrarrenal da veia cava inferior. A gravidez foi seguida em consulta hospitalar na nossa instituição, tendo a grávida sido medicada com enoxaparina em dose profilática e ácido acetilsalicílico, com um período pré natal que decorreu sem intercorrências. Às 37 semanas e 6 dias de gestação, deu entrada no Serviço de Urgência de Obstetrícia por rotura prematura de membranas. Intraparto foram utilizadas meias de compressão pneumática intermitente, tendo o parto ocorrido às 38 semanas de gestação por via vaginal (parto eutócico), do qual nasceu um recém-nascido do sexo feminino, com 2620g e índice de Apgar 9/10/10. O presente caso clínico demonstra que em situações de hipoplasia da veia cava inferior com um seguimento obstétrico adequado é possível a realização de um parto vaginal, possibilitando um desfecho obstétrico favorável (AU).

Hypoplasia of the inferior vena cava is a rare condition that belongs to the group of developmental anomalies of the inferior vena cava. It has an incidence between 0.3% and 0.5% in the healthy population and 5% in young adults without risk factors for deep venous thrombosis, being considered an important risk factor for the development of lower limb thrombosis. This study aims to report the obstetric conduct of a clinical case of a pregnant woman diagnosed with hypoplasia of the inferior vena cava prior to pregnancy. This is a clinical case of a pregnant woman, primigravid 37 years old, with hypoplasia of the inferior vena cava and heterozygosity for MTHFR677, diagnosed following a bilateral venous thrombosis of the lower limbs and the infrarenal segment of the inferior vena cava. The pregnancy was followed up in our institution. The pregnant woman was medicated with a prophylatic dose of low molecular weight heparin and acetylsalicylic acid with an uneventful prenatal period. At 37 weeks and 6 days of gestation, she was admitted to the Obstetrics Emergency Service due to premature rupture of membranes. Intermittent pneumatic compression sockings were used intrapartum, and at 38 weeks of gestation, a female newborn was vaginally delivered (eutocic delivery) with 2620g and an Apgar score of 9/10/10. The present clinical case demonstrates that in situations of hypoplasia of the inferior vena cava with an adequate obstetric follow-up, it is possible to perform a vaginal delivery, enabling a favourable obstetric outcome (AU).

Preoperative assessment of inferior vena cava collapsibility index by ultrasound is not a reliable predictor of post-spinal anesthesia hypotension

Abstract Background Post-spinal anesthesia hypotension is of common occurrence, and it hampers tissue perfusion. Several preoperative factors determine patient susceptibility to hypotension. This study aimed to assess the effectiveness of the Inferior Vena Cava Collapsibility Index (IVCCI) for predicting intraoperative hypotension. Methods One hundred twenty-nine adult patients who were scheduled for elective surgical procedures after administration of spinal (intrathecal) anesthesia were included in the study. Ultrasound evaluation of the Inferior Vena Cava (IVC) was done in the preoperative area, and the patients were shifted to the Operating Room (OR) for spinal anesthesia. An independent observer recorded the change in blood pressure after spinal anesthesia inside the OR. Results Twenty-five patients developed hypotension (19.37%). Baseline systolic blood pressure and mean blood pressures were statistically higher in those patients who developed hypotension (p= 0.001). The logistic regression analysis for IVCCI and the incidence of hypotension showed r2 of 0.025. Receiver Operating Characteristic (ROC) curve analysis demonstrated the Area Under the Curve (AUC) of 0.467 (95% Confidence Interval, 0.338 to 0.597; p= 0.615). Conclusions Preoperative evaluation of IVCCI is not a good predictor for the occurrence of hypotension after spinal anesthesia.

Nefrectomía radical con trombectomía de vena cava: 20 años de cirugías por tumor renal / Vena cava thrombectomy in kidney cancer. Report of 32 nephrectomies

BACKGROUND: Vena cava (VC) involvement in kidney tumors occurs in 4 to 10% of cases, and is associated with a higher mortality. Nephrectomy with thrombectomy of the VC, performed by a multidisciplinary team, improves survival. Aim: To report a series of consecutive nephrectomies with caval thrombectomy performed in an academic center. PATIENTS AND METHODS: We report 32 patients with cT3b and 3c renal tumors, who underwent radical nephrectomy with VC thrombectomy between 2001 and 2021. A descriptive analysis of clinical, surgical and pathological variables was performed. Overall survival (OS) and cancer-specific survival (CSS) was calculated using Kaplan-Meier curves. Results: The mean tumor size was 9.7 cm. According to Mayo classification 3/32 (9%) patients had a type I thrombus, 10/32 (31%) had a type II thrombus, 8/32 (25%) had a type III thrombus, and 5/32 (16%) had a type IV thrombus. The mean bleeding was 2000 cc. There was one intraoperative death. Nineteen percent of patients had complications >= 3 according to Clavien-Dindo classification. Reoperations occurred in 9%. Pre and postoperative creatinine levels were 1.17 and 1.91 mg/dl respectively (p < 0.01). Pre and postoperative Hematocrit levels were 47.9 and 31% respectively (p = 0.02). Sixty six percent of tumors were clear cell renal cancer, 9% were papillary and 3% were chromophobic. Mean OS was 10 months. Two-year SCE was 40%. CONCLUSIONS: Our results are similar to those reported elsewhere. Despite being an unusual pathology, the surgical technique has been improving, thanks to the multidisciplinary work of urologists and surgeons.

Comparison of vena cava distensibility index and pulse pressure variation for the evaluation of intravascular volume in critically ill children

Abstract Objective: In this study, the authors aimed to evaluate the effectiveness of the vena cava distensibility index and pulse pressure variation as dynamic parameters for estimating intravascular volume in critically ill children. Methods: Patients aged 1 month to 18 years, who were hospitalized in the present study's pediatric intensive care unit, were included in the study. The patients were divided into two groups according to central venous pressure: hypovolemic (< 8mmHg) and non-hypovolemic (central venous pressure ≥ 8 mmHg) groups. In both groups, vena cava distensibility index was measured using bedside ultrasound and pulse pressure variation. Measurements were recorded and evaluated under arterial monitoring. Results: In total, 19 (47.5%) of the 40 subjects included in the study were assigned to the central venous pressure ≥ 8 mmHg group, and 21 (52.5%) to the central venous pressure < 8 mmHg group. A moderate positive correlation was found between pulse pressure variation and vena cava distensibility index (r = 0.475, p < 0.01), while there were strong negative correlations of central venous pressure with pulse pressure variation and vena cava distensibility index (r = -0.628, p < 0.001 and r = -0.760, p < 0.001, respectively). In terms of predicting hypovolemia, the predictive power for vena cava distensibility index was > 16% (sensitivity, 90.5%; specificity, 94.7%) and that for pulse pressure variation was > 14% (sensitivity, 71.4%; specificity, 89.5%). Conclusion: Vena cava distensibility index has higher sensitivity and specificity than pulse pressure variation for estimating intravascular volume, along with the advantage of non-invasive bedside application.

Robotic-assisted nephrectomy with level II IVC thrombectomy using Rummel Tourniquets

ABSTRACT Background: Inferior vena cava (IVC) invasion from renal cell carcinoma (RCC) occurs at a rate of 4-10% (1). IVC thrombectomy (IVC-TE) can be an open procedure because of the need for handling of the IVC (2). The first reported series of robotic management of IVC-TE started in 2011 for the management of Level I - II thrombi with subsequent case reports in recent years (2-5). Materials and Methods: The following is a patient in his 50's with no significant medical history. Magnetic resonance imaging and IR venogram were performed preoperatively. The tumor was clinical stage T3b with a 4.3cm inferior vena cava thrombus. The patient underwent robotic assisted nephrectomy and IVC-TE. Rummel tourniquets were used for the contralateral kidney and the IVC. The tourniquets were created using vessel loops, a 24 French foley catheter and hem-o-lock clips. Results: The patient tolerated the surgical procedure well with no intraoperative complications. Total surgical time was 274 min with 200 minutes of console time and 22 minutes of IVC occlusion. Total blood loss in the surgery was 850cc. The patient was discharged from the hospital on post-operative day 3 without any complications. The final pathology of the specimen was pT3b clear cell renal cell carcinoma Fuhrman grade 2. The patient followed up post-operatively at both four months and six months without disease recurrence. The patient continues annual follow-up with no recurrence. Conclusions: Surgeon experience is a key factor in radical nephrectomy with thrombectomy as patients have a reported 50-65% survival rate after IVC-TE (4).

Tumor renal con extensión al atrio derecho a través de la vena cava inferior: reporte de caso / Renal tumor with extension to the right atrium through the inferior vena cava: case report

Resumen El presente articulo describe un caso clínico de una paciente con un ''trombo tumoral''. Estos son tumores que se extienden desde el órgano afectado hasta el atrio derecho, por la vena cava inferior. Hasta el 10 % de los tumores descritos pueden alcanzar la vena cava inferior y el 1 % de estos llegan a atrio derecho. El carcinoma de células renales es el más frecuente en producir este cuadro. El objetivo del articulo es mostrar que es fundamental realizar un adecuado diagnóstico diferencial, ya que existen diferentes procesos tumorales que pueden causar un ''trombo tumoral'' y diferentes causas de masas en el atrio derecho. La clínica de los pacientes con este cuadro será por obstrucción de la vena cava. El diagnóstico se realiza con estudios de imágenes, ultrasonido (US), ecocardiograma, tomografía axial computarizada (TAC) y resonancia magnética. El manejo debe de ser quirúrgico, sin embargo, presenta pronóstico desfavorable, en algunos casos se puede resecar el tumor primario y extraer la masa que ha invadido la vena cava inferior.

Abstract: This article describes a clinical case of a patient with a 'tumoral thrombus''. These are tumors that extend from the affected organ to the right atrium, through the inferior vena cava. Up to 10% of the tumors described can reach the inferior vena cava and 1% of these reach the right atrium. Renal cell carcinoma is the most common to produce this condition. The objective of the article is to show that it is essential to carry out an adequate differential diagnosis since there are different tumor processes that can cause a ''tumoral thrombus'' and different causes of masses in the right atrium. The symptoms of patients with this condition will be caused by the obstruction of the vena cava. The diagnosis is made with imaging studies, ultrasound (US), echocardiography, computerized axial tomography (CT) and magnetic resonance imaging. The management must be surgical, however it has an unfavorable prognosis, in some cases the primary tumor can be resected and the mass that has invaded the inferior vena cava removed.

A Rare Associated Anomaly in Tetralogy of Fallot: Scimitar Syndrome in an Infant

Abstract Pulmonary venous connections may be infrequently abnormal in patients with tetralogy of Fallot (TOF). A special subgroup of partial anomalous pulmonary venous return,"scimitar cyndrome", and its coexistence with TOF is less frequently reported. It may proceed unnoticed, as cyanosis already predominates in the clinical picture. This uncommon association must be kept in mind for patients with TOF who have an accessory flow in the inferior vena cava, especially when all pulmonary venous return to the left atrium is not clearly seen.

Métodos diagnósticos en hipertensión portal / Diagnostic methods of portal hypertension

Resumen La hipertensión portal es un síndrome caracterizado por el incremento en el gradiente de presión portal, definido por la diferencia entre la presión de la porta y la vena cava inferior. Esta presión depende del flujo venoso y la resistencia vascular. En los pacientes cirróticos estas dos variables están alteradas de manera suprafisiológica, inicialmente por la lesión estructural dependiente de fibrosis y los nódulos de regeneración y posteriormente por cambios dinámicos vasculares que causan vasoconstricción intrahepática y vasodilatación esplácnica, lo cual explica las manifestaciones sistémicas de la cirrosis. La importancia de la hipertensión portal radica en la frecuencia y severidad de las complicaciones asociadas, especialmente la hemorragia variceal y otras como ascitis, peritonitis bacteriana espontanea, síndrome hepatorrenal y encefalopatía hepática. El objetivo de este artículo es realizar una revisión actualizada sobre el uso de las pruebas diagnósticas invasivas y no invasivas disponibles para el estudio de la hipertensión portal y su aplicación en la práctica clínica.

Abstract Portal hypertension is characterized by an increase in the portal pressure gradient, which is defined as the difference between the portal venous pressure and the pressure within the inferior vena cava. Such a pressure depends on venous flow and vascular resistance. In patients with cirrhosis, both variables are altered, initially due to fibrosis-dependent structural injury and regeneration nodules, and subsequently by vascular dynamic changes that cause intrahepatic vasoconstriction and splanchnic vasodilation, which explains the systemic manifestations of cirrhosis. The importance of portal hypertension lies in the frequency and severity of associated complications, especially variceal hemorrhage, but also ascites, spontaneous bacterial peritonitis, hepatorenal syndrome, and hepatic encephalopathy. The objective of this article is to carry out an updated review on the use of invasive and non-invasive diagnostic tests available for the study of portal hypertension and their application in clinical practice.

Filtro de vena cava inferior, resultados a mediano y largo plazo / Inferior vena cava filter medium to long-term results

Resumen Introducción: El tromboembolismo pulmonar sin tratamiento, presenta un riesgo de recurrencia del 20%, con una mortalidad del 18% al 26%, en pacientes con embolia pulmonar donde esta contraindica o fracasa la anticoagulación, es necesario interrumpir parcialmente la vena cava inferior, siendo los filtros de vena cava la alternativa más utilizada. Objetivo: Analizar las variables epidemiológicas involucradas en la enfermedad tromboembólica y los resultados de la inserción del filtro de vena cava inferior. Materiales y Método: Estudio retrospectivo, observacional y descriptivo, donde se analiza la inserción sucesiva de 82 filtros de vena cava inferior, en un período de 10 años (2009 al 2019), en el Hospital Dr. Eduardo Pereira de Valparaíso, Chile. Resultados: Sexo femenino 53,6%, edad promedio 60,4 años (rango 19-86), la principal causa para desarrollar enfermedad tromboembólica fueron las enfermedades oncológicas (56,09%), la principal vía de acceso fue la vena femoral común (69,51%), localización del filtro suprarrenal (4,87%), se obtuvo un seguimiento actualizado en el 89,02%, la supervivencia a 5 años fue de 73,17% y a 10 años de 57,32%, morbilidad en relación al procedimiento (9,75%), éxito del procedimiento (97,5%), no hubo mortalidad relacionada. Discusión: Los grandes ensayos, demuestran el beneficio de la interrupción de la vena cava inferior mediante filtros, especialmente en pacientes oncológicos, con elevado riesgo de embolia pulmonar. Conclusión: La inserción de un filtro de vena cava inferior, adecuadamente indicado, es un procedimiento mínimamente invasivo, de bajo riesgo y con excelentes resultados en la profilaxis de la embolia pulmonar.

Introduction: Pulmonary thromboembolism without treatment presents a risk of recurrence of 20%, with a mortality of 18% to 26%. In patients with pulmonary embolism, when anticoagulation therapy is contraindicated or failed, it is necessary to intervene partially the inferior vena cava on which cava vein filters are the main used alternative. Aim: Analyze the epidemiological variables involved on thromboembolic disease, and the outcomes of the inferior vena cava filter insertions. Materials and Method: Retrospective, observational and descriptive study, which analyzes the successive insertion of 82 inferior vena cava filters, over a period of 10 years (2009 to 2019), in the Dr. Eduardo Pereira Hospital, Valparaíso, Chile. Results: Female sex 53.6%, average age 60.4 years (range 19-86), the main cause to develop thromboembolic disease were oncological diseases (56.09%); the main access path was the common femoral vein (69.51%); in a 4.87% the location of the filter was suprarenal. Complete follow-up was obtained in 89.02% of the cases, 5-year survival with 73.17% ratio and 10-years survival of 57.32%, morbidity in relation to the procedure was 9.75%; success of the procedure 97.5%; there was no mortality related. Discussion: Large studies demonstrate the benefits of interruption on the inferior vena cava through filters, especially in cancer patients with high risk of pulmonary embolism. Conclusion: The insertion of an inferior vena cava filter when indication is adequate, is a minimally invasive procedure with low risk and excellent results in the prophylaxis of pulmonary embolism.

Ultrassonografia da veia cava inferior na avaliação do volume intravascular e fluido-responsividade em pacientes críticos: uma revisão sistemática / Inferior vena cava ultrasound for assessing volume status and fluid responsiveness in critically ill patients: a systematic review

Fundamento: A avaliação do volume intravascular e da fluido-responsividade é uma condição desafiadora no manejo de pacientes críticos. Os métodos diagnósticos precisam garantir segurança, reprodutibilidade e praticidade no monitoramento hemodinâmico. Objetivo: Descrever a aplicabilidade dos índices ultrassonográficos da veia cava inferior na avaliação do volume intravascular e na predição da fluido-responsividade em pacientes críticos. Método: Trata-se de revisão sistemática realizada por meio das bases de dados PubMed®, Lilacs e SciELO nos 5 anos anteriores. Os descritores utilizados foram "inferior vena cava", "ultrasonography", "fluid-responsiveness" e "volume status". Resultados: Foram selecionados 13 artigos compatíveis com os objetivos deste estudo. O índice de colapsibilidade da veia cava inferior variou de 25% a 50% como ponto de corte para definição de hipovolemia. Além disso, apresentou aplicabilidade na predição da fluido-responsividade em pacientes sob respiração espontânea, com pontos de corte variando de 25% a 57%. Em cenários de ventilação mecânica, o índice de distensibilidade da veia cava inferior mostrou-se mais eficaz, quando comparado às demais medidas, para predição de fluido-responsividade, mas foi encontrada variação de 10,2% a 20,5%. O índice diâmetro da veia cava inferior/diâmetro da artéria aorta foi especialmente útil na população pediátrica para definição do volume intravascular, mas em adultos existiram muitas divergências quanto à sua aplicabilidade. Conclusão: A avaliação do volume intravascular e da fluido-responsividade por meio dos índices ultrassonográficos da veia cava inferior apresenta aplicabilidade e segurança no diagnóstico e no monitoramento da instabilidade hemodinâmica. Entretanto, são necessários estudos de padronização de valores em razão das divergências quanto aos pontos de corte utilizados em cada índice.(AU)

Leiomiosarcoma de la vena cava inferior. ¿Qué buscar en las imágenes? Revisión a propósito de un caso / Leiomyosarcoma of the inferior vena cava. What to look for in the images? Presentation of a case

El leiomiosarcoma de la vena cava inferior (VCI) es un tumor mesenquimal maligno, poco frecuente, de bajo crecimiento, que surge en las células de músculo liso de la túnica media de la pared vascular y que tiene en general un mal pronóstico. Las imágenes juegan un papel crucial en el abordaje diagnóstico y en el planeamiento quirúrgico, por lo que reconocer los hallazgos más frecuentes es necesario en la práctica radiológica. A continuación, se describe un caso que ilustra los aspectos más representativos de esta enfermedad en diferentes modalidades diagnósticas, incluyendo tomografía, resonancia magnética y PET-CT, con el objetivo de hacer un reconocimiento de las características que puedan llevar a un diagnóstico temprano y, por lo tanto, a favorecer la sobrevida de los pacientes.

Inferior vena cava leiomyosarcoma (IVC) is a low-growing, malignant mesenchymal tumor that arises in the smooth muscle cells of the tunica media of the vascular wall and has a generally poor prognosis. Images play a crucial role in the diagnostic approach and in surgical planning, therefore, recognizing the most frequent findings is necessary in radiological practice. We describe a case that outlines the most typical findings in different diagnostic modalities including tomography, magnetic resonance imaging and PET-CT, with the aim of recognizing the characteristics that can lead to an earlier diagnosis and therefore to favor patient survival.

Rare case of concomitant juxtarenal aortic aneurysm and type 1 Inferior Vena Cava duplication: -intraoperative challenges to avoid catastrophe / Caso raro de aneurisma de aorta justarrenal e duplicação do tipo 1 concomitantes na veia cava inferior - desafios intraoperatórios para evitar catástrofes

Abstract Duplication of the inferior vena cava is a rare congenital anomaly, with an incidence of 0.2-3%. Despite being asymptomatic, anomalies of IVC are important in aortoiliac and retroperitoneal surgeries. Preoperative CT imaging is essential to identify any IVC anomaly and to prevent unexpected hemorrhage during surgery. Here, we report a case of a juxtarenal abdominal aortic aneurysm in which we encountered a type I IVC duplication anomaly intraoperatively while performing transperitoneal aneurysmorrhaphy and took precautions to avoid any iatrogenic injuries to either of the two trunks or the pre-aortic trunk of the anomalous duplicate IVC.

Resumo A duplicação da veia cava inferior (VCI) é uma anomalia congênita rara com incidência de 0,2 a 3%. Apesar de assintomáticas, anomalias da VCI são importantes em cirurgias aortoilíacas e retroperitoneais. A imagem da tomografia pré-operatória é essencial para identificar qualquer anomalia de VCI e para evitar hemorragia inesperada durante a cirurgia. Relatamos um caso de aneurisma de aorta abdominal justarrenal, no qual encontramos uma anomalia de duplicação de VCI do tipo 1 intraoperatório enquanto realizávamos correção cirúrgica de aneurisma transperitoneal. Por isso, tomamos a precaução para evitar qualquer lesão iatrogênica nos dois troncos e no tronco pré-aórtico de VCI duplicada anômala.

Agenesia de segmento infra-hepático de veia cava inferior associada a trombose venosa profunda de repetição: relato de caso / Agenesis of the infra-hepatic segment of the inferior vena cava associated with recurrent deep venous thrombosis: case report

Resumo A agenesia de veia cava inferior é descrita em menos de 1% da população, de ocorrência rara e devido a alterações embrionárias. Sua correlação com a trombose venosa profunda certamente é subestimada, visto que tal alteração é de difícil detecção pela ultrassonografia. O objetivo deste artigo foi relatar o caso de uma paciente de 41 anos com dor e edema até a raiz de coxa direita após cirurgia plástica. Foi realizado dúplex venoso de membros inferiores e evidenciada trombose venosa profunda ilíaco-femoro-poplíteo e distal bilateralmente. Solicitado angiotomografia venosa devido a não visualização de veia cava inferior no ultrassom, evidenciando trombose de plexo lombar direito e segmento ilíaco-femoral bilateral, além de agenesia de segmento infra-hepático de veia cava inferior, com ectasia e tortuosidade compensatória de veias paravertebrais, sistema ázigos e hemiázigos, com varizes pélvicas bilateralmente. Foi realizada anticoagulação sistêmica e oral, com boa evolução clínica.

Abstract Agenesis of the inferior vena cava (IVC) has been described in less than 1% of the population; a rare occurrence caused by embryonic abnormalities. Its correlation with deep vein thrombosis (DVT) is certainly underestimated, since this change is hard to detect using ultrasound. The aim of the article is to report the case of a 41-year-old female patient with pain and edema up to the top of the right thigh after plastic surgery. Bilateral venous duplex ultrasound revealed bilateral DVT involving iliac-femoral-popliteal and distal segments. Venous angiotomography was requested because the IVC was not visible on ultrasound, revealing thrombosis of the right lumbar plexus and iliofemoral segment bilaterally and agenesis of the infrahepatic segment of the inferior vena cava, with ectasia and compensatory tortuosity of paravertebral veins and the azygos-hemiazygos system, and bilateral pelvic varices. Systemic and oral anticoagulation were administered, with a satisfactory clinical response.

Is routine screening for silent pulmonary embolism justified in patients with deep vein thrombosis? / Existe justificativa para o rastreio de embolia pulmonar silenciosa em pacientes com trombose venosa profunda?

Abstract The incidence of asymptomatic pulmonary embolism (PE) exceeds 70% in patients with deep venous thrombosis (DVT), even in cases of distal deep vein thrombosis. We report the case of a patient with a diagnosis of DVT in the lower left limb associated with asymptomatic PE who presented late symptoms due to this same PE. The absence of acute symptoms and the late onset of symptoms could have provoked doubts about the most appropriate treatment, resulting in unnecessary interventions, if pulmonary embolism had not already been diagnosed with tomography. In the present case, we demonstrate that computed tomography angiography conducted at the time of DVT diagnosis accurately diagnosed PE and prevented any misinterpretation of recurrent DVT in a patient already being medicated, which could have been mistakenly interpreted as demonstrating failure of anticoagulant therapy. Such a situation could lead to unnecessary intervention to fit an inferior vena cava filter. We cannot suggest that a classic medical conduct should be reformulated simply on the basis of a case report. However, we would be remiss not to suggest that well-designed studies should be carried out in the future to assess the need for this examination in the acute phase.

Resumo A ocorrência de embolia pulmonar assintomática em pacientes com trombose venosa profunda tem uma incidência que excede 70%, mesmo nos casos de trombose venosa profunda distal. Relatamos o caso de um paciente com diagnóstico de trombose venosa profunda no membro inferior esquerdo associado a embolia pulmonar assintomática, que apresentou sintomas tardios devido a essa mesma embolia. A ausência de sintomas agudos e o surgimento de sintomas tardios pode suscitar dúvidas quanto ao tratamento mais adequado e resultar em intervenções desnecessárias, se o diagnóstico tomográfico de embolia pulmonar não tiver sido feito anteriormente. No presente caso, demonstramos que uma angiotomografia realizada no momento do diagnóstico de trombose venosa profunda detectou a embolia pulmonar e evitou uma interpretação incorreta de um evento trombótico recorrente na vigência de anticoagulação, o que por engano demonstraria uma falha na terapia anticoagulante. Essa situação pode levar a intervenções desnecessárias, como o implante de filtro de veia cava inferior. Entendemos que apenas um relato de caso não deve mudar uma conduta médica já estabelecida; no entanto, fomenta a discussão e estimula estudos que avaliem a necessidade de um exame diagnóstico pulmonar no momento do diagnóstico de trombose venosa profunda.

Trombosis venosa profunda y agenesia de vena cava inferior: presentación típica en una anomalía poco frecuente. Caso clínico

Abnormalities of the inferior vena cava are rare. Its embryological development occurs between the sixth and eighth week of gestation and depends on the persistence or regression of three pairs of veins: the posterior cardinal veins, the subcardinal veins and the supracardinal veins. The type of congenital alteration depends on the moment that embryogenesis is altered. The most frequent clinical presentation is deep vein thrombosis, which occurs mainly in young men. We report a 16-year-old male presenting with edema of the left leg. No risk factor for thrombosis was recorded. A Doppler ultrasound confirmed the presence of a deep femoro-popliteal vein thrombosis. An abdominal CAT scan showed an agenesis of the supra and infra-adrenal inferior vena cava, with multiple collaterals. The study for thrombophilia was negative. The patient was treated with vitamin K antagonists with a good clinical response.

Hipertensión portal secundario a trombosis de la vena porta y várices esofágicas / Secondary portal hypertension to portal venous thrombosis and esophageal varices

Resumen La hipertensión portal se define como la alteración patológica en el gradiente de presión a nivel del sistema portal, es decir, la diferencia entre la presión de la vena porta y la vena cava inferior. El valor normal es entre 1-5 mm Hg y se considera hipertensión cuando es mayor de 10 mm Hg. En este artículo, se describe el caso de una paciente de 5 años con un cuadro de hipertensión portal secundario a várices esofágicas y trombosis de la vena porta, confirmado por endoscopia de vías digestivas alta y angioresonancia magnética. La paciente fue atendida en la Fundación Clínica Infantil Club Noel de la ciudad de Cali, Colombia, entre los meses de diciembre del 2018 y febrero del 2019.

Abstract Portal hypertension is defined as the pathological increase in the portal pressure gradient, which is the difference between the pressure of the portal vein and the inferior vena cava. Normally portal vein pressure ranges between 1-5 mmHg and is considered hypertension when it is higher than 10 mmHg. In this study the case of a 5-year-old patient that suffers from secondary portal hypertension to portal venous thrombosis and esophageal varices is presented. The diagnostic is confirmed by an endoscopy of the upper gastrointestinal tract and by a magnetic angioresonance. The patient was treated at the Fundacion Clinica Infantil Club Noel located in Cali, Colombia, between the months of December 2018 and February 2019.

Hallazgos por imagen de malformación de Abernethy tipo II en paciente de 12 años / Image finding of Abernethy type II malformation in 12 year old patient

Las malformaciones del sistema venoso abdominal son alteraciones vasculares raras. La incidencia de esta afección se estima en uno de cada 30,000 nacimientos y se asocian con malformaciones gas- trointestinal, genitourinaria, ósea y cardiovascular. En el 2018 se ha registrado en la literatura mundial 39 casos de Abernethy tipo I y 22 casos de Abernethy tipo II. CASO CLÍNICO paciente femenino de 12 años con antecedente de hipertensión portal tratada hace 2 años, con historia de malestar general e ic- tericia, acudió a centro privado para realizarse estudios complementarios. Un ultrasonido Doppler por- tal evidenció una lesión isoecogénica al parénquima hepático en el aspecto inferior del lóbulo derecho. Se continuó la evaluación realizando una tomografía en la cual se observó: configuración anómala del sistema venoso portal; la vena esplénica y mesentérica superior se encuentran dilatadas, además se evidenció confluencia portoesplénica elongada, en la cual derivan dos trayectos portales, uno de ellos drenando la lobulación hepática antes descrita y la segundo se comunica con el sistema venoso portal hepático derecho, demostrando tortuosidad de su trayecto, con estenosis de su porción proximal. Los hallazgos antes descritos sugieren malformación vascular del sistema venoso portal-esplácnico, que causa derivación porto-sistémica en relación a malformación de Abernethy tipo II. En conclusión se recomienda el diagnóstico precoz. El examen preferente es el ecodoppler con posterior confirmación mediante angiotac abdominal. El tratamiento es sumamente importante pues su retraso puede devenir en lesiones irreparables hasta la insuficiencia hepática y muerte...(AU)

Ruptura de vena cava inferior secundaria a uso de sonda de ecografía intracardiaca tratada de manera exitosa con balón de alta distensibilidad / Inferior vena cava rupture associated with the use of an intracardiac echocardiography probe and successfully treated with a high-compliance balloon

Resumen La ruptura de la vena cava inferior durante los procedimientos de intervencionismo percutáneo es una complicación infrecuente que se asocia con alta tasa de mortalidad aunque sea detectada a tiempo y se realice reparo quirúrgico, el cual es hoy el estándar de manejo. No existen hasta el momento casos reportados de manejo percutáneo de perforación de la vena cava durante procedimientos de electrofisiología. Se describe el caso de una paciente llevada a aislamiento eléctrico de venas pulmonares para el manejo de fibrilación auricular paroxística, en quien, durante el procedimiento, se produjo perforación accidental de la vena cava inferior con la sonda de ecocardiografía intracardiaca, la cual fue tratada exitosamente mediante el uso de un balón de alta distensibilidad con lo que se logró adecuada hemostasia sin necesidad de intervención quirúrgica. Se considera que el uso de un balón de alta distensibilidad puede ser una herramienta útil en el control del sangrado asociado a lesiones vasculares iatrogénicas, y que por consiguiente todo intervencionista debería tener presente.

Abstract Rupture of the inferior vena cava during percutaneous intervention procedures is an uncommon complication. It is associated with a high rate of mortality, even when it is detected at the time and the current standard management, surgical repair is performed. At present there are no cases reported of the percutaneous management of a vena cava perforation during electrophysiology procedures. The case is described of a patient subjected to electric ablation of pulmonary veins for the management of paroxysmal atrial fibrillation. During the procedure there was an accidental rupture of the inferior vena cava with the echocardiography cardiac catheter. She was successfully treated using a high-compliance balloon, with adequate haemostasis being achieved without surgical intervention. The use of a high-compliance balloon is considered as a useful tool in the control of bleeding associated with iatrogenic vascular injuries, and for this reason all interventionist should be aware of it.

Diagnostic accuracy of contrast-enhanced ultrasound for detecting bland thrombus from inferior vena cava tumor thrombus in patients with renal cell carcinoma

ABSTRACT Purpose: To evaluate the role of contrast-enhanced ultrasound (CEUS) in differentiating bland thrombus from tumor thrombus of the inferior vena cava (IVC) in patients with renal cell carcinoma (RCC). Materials and Methods: We retrospectively investigated 30 consecutive patients who underwent robot-assisted radical nephrectomy with IVC thrombectomy and had pathologically confirmed RCC. All patients underwent US and CEUS examination. Two off-line readers observed and recorded thrombus imaging information and enhancement patterns. Sensitivity, specificity, accuracy, positive predictive value and negative predictive value for bland thrombus were assessed. Results: Of the 30 patients, no adverse events occurred during administration of the contrast agent. Early enhancement of the mass within the IVC lumen on CEUS was an indicator of tumor thrombus. Bland thrombus showed no intraluminal flow on CEUS. There were eight (26.7%) patients with bland thrombus, including three level II, two level III, and three level IV. There were three cases with cephalic bland thrombus and five cases with caudal bland thrombus. Three caudal bland thrombi extended to the iliac vein and underwent surgical IVC interruption. Based on no intraluminal flow, for bland thrombus, CEUS had 87.5% sensitivity, 100% specificity, 96.7% accuracy, 100% positive predictive value and 95.6% negative predictive value. Conclusion: Our study demonstrates the potential of CEUS in the differentiation of bland and tumor thrombus of the IVC in patients with RCC. Since CEUS is an effective, inexpensive, and non-invasive method, it could be a reliable tool in the evaluation of IVC thrombus in patients with RCC.

Vena cava inferior como factor predictor del shock en trauma: medición ecográfica / Inferior vena cava as a predictor of shock in trauma patients: sonographic measurement

Resumen Objetivo Establecer la medición ecográfica del diámetro de la vena cava inferior como factor predictor del shock en pacientes politraumatizados. Materiales y Método Estudio de corte transversal donde se determinó la medición ecográfica de la vena cava inferior a 40 pacientes que ingresaron a la Unidad de Politraumatizados (UPT) del Hospital General del Este "Dr. Domingo Luciani", en el período entre enero y abril de 2018. Se seleccionaron 2 grupos; el grupo 1: pacientes en shock , aquellos con tensión arterial sistólica menor a 90 mm Hg al ingreso, y el grupo 2: pacientes controles que mantuvieron cifras tensionales normales. El estudio de imagen de la vena cava inferior se realizó con el equipo de ecografía ALOKA prosound SSD-a5 y con el ultrasonido portátil MicroMaxx SonoSite , en el cual se midió el índice de colapsabilidad. Los hallazgos se registraron en la hoja de recolección de datos. El análisis estadístico se hizo con la prueba de t de student para muestras independientes y la valoración de puntos de corte diagnóstico se hizo con la prueba de ROC. Resultados La media del Índice de colapsabilidad (IC) de la VCI para el grupo control y de shock fue de 26 ± 12,7% y de 58,5 ± 5,9%, respectivamente; El índice de colapsabilidad fue > 50% en todos los pacientes del grupo de shock . Conclusiones La medición del diámetro de la VCI es un predictor de shock , siendo el IC el parámetro más sensible y específico.

Aim To establish the sonographic measurement of the diameter of the inferior vena cava as a predictor of shock in trauma patients. Materials and Method A cross-sectional study to determined the sonographic measurement of the inferior vena cava to 40 patients attended at Hospital Domingo Luciani trauma unit, in the period between January and April of 2018. Two groups were selected; group 1: shock patients, those with systolic blood pressure lower than 90 mm Hg, and the group 2: control patients that kept normal blood pressure. The image study of the inferior vena cava was carried out with the ALOKA prosound ultrasound equipment SSD a5 and with the portable ultrasound MicroMaxx SonoSite, in which the collapsibility index was measured. The findings were recorded in the data collection sheet. The statistical analysis proposed for the comparison of averages was made with the student's t-test for independent samples and the assessment of diagnostic cut-off points was made with a ROC curve. Results the mean of collapsability index of de IVC for control and shock group were 26 ± 12,7% and 58,5 ± 5,9%, respectively; The collapsability index (CI) was > 50% in all patients of shock group. Conclusions The measurement of the ICV diameter is a predictor of shock, being the IC the most sensitive and specific parameter.