RESUMEN

Ilio-femoral venous reconstruction has progressed from being only performed by a limited number of pioneers (often using equipment repurposed from other areas of interventional radiology) to a discrete subspecialty of endovascular practice with a dedicated range of tools and increasingly evolved techniques to secure optimal results. This review is intended to reflect the modern practice of ilio-femoral stenting in the acute and chronic settings, from initial patient assessment to completion of procedure and follow-up care.

RESUMEN

BACKGROUND: Iliofemoral deep venous thrombosis (IFDVT) is associated with an incidence of post-thrombotic syndrome (PTS) of up to 50%. PTS is associated with high morbidity, impaired quality of life and a significant economic burden. The aim of the current study was to assess the impact of a single session pharmacomechanical thrombectomy (PMT), dedicated venous stents and a risk mitigation protocol on the rate of PTS. METHODS: Between 2015 and 2022, patients presenting with acute or subacute IFDVT treated with the same protocol of single session PMT, dedicated venous stents, and risk-mitigation measures were included. Procedural success rate, complications, stent patency and incidence of PTS were determined. RESULTS: Of 60 patients (58 ± 19 years; 65% male), the procedural success rate was 93%, with 7% of patients experiencing complications but no long-term sequelae or mortality. Most (n = 52; 87%) patients were stented, including 46% across the inguinal ligament. At 3 months post-procedure, primary, assisted primary and secondary stent patency rates were 89%, 93% and 98%, respectively, with no loss of patency or re-interventions after that. At latest follow-up of a median 48 months (n = 32), stent patency rate was 97%, with only three patients (9%) experiencing symptoms of PTS. CONCLUSION: Single session PMT, dedicated venous stents and a risk-mitigation protocol results in high success rate, excellent long-term stent patency and low incidence of PTS without compromising safety. These results support early intervention for iliofemoral DVT.

Asunto(s)

Síndrome Postrombótico , Trombosis de la Vena , Humanos , Masculino , Femenino , Terapia Trombolítica/métodos , Incidencia , Calidad de Vida , Resultado del Tratamiento , Vena Ilíaca/cirugía , Vena Femoral/cirugía , Grado de Desobstrucción Vascular , Síndrome Postrombótico/epidemiología , Síndrome Postrombótico/etiología , Trombosis de la Vena/epidemiología , Trombosis de la Vena/etiología , Trombosis de la Vena/tratamiento farmacológico , Trombectomía/efectos adversos , Trombectomía/métodos , Stents/efectos adversos , Estudios Retrospectivos

RESUMEN

OBJECTIVE: Deep vein thrombosis (DVT) is a common condition with a high risk of post-thrombotic morbidity, especially in patients with a proximal thrombus. Successful iliofemoral clot removal has been shown to decrease the severity of post-thrombotic syndrome. It is assumed that earlier thrombus lysis is associated with a better outcome. Generally, the earlier IFDVT is confirmed, the earlier thrombus lysis could be performed. d-Dimer levels and Wells score are currently used to assess the preduplex probability for DVT; however, some studies indicate that the d-dimer value varies depending on the thrombus extent and localization. Using d-dimer and other risk factors might facilitate development of a model selecting those with an increased risk of IFDVT that might benefit from early referral for additional analysis and adjunctive iliofemoral thrombectomy. METHODS: All consecutive adult patients from a retrospective cohort of STAR diagnostic center (primary care) in Rotterdam suspected of having DVT between September 2004 and August 2016 were assessed for this retrospective study. The diagnostic workup for DVT including Wells score and d-dimer were performed as well as complete duplex ultrasound examination. Patients with objective evidence of DVT were categorized according to thrombus localization using the Lower Extremity Thrombolysis classification. Logistic regression analysis was done for a model predicting IFDVT. The cut-off value of the model was determined using a receiver operating characteristic curve. RESULTS: A total of 3381 patients were eligible for study recruitment, of whom 489 (14.5%) had confirmed DVT. We developed a multivariate model (sensitivity of 77% and specificity of 82%; area under the curve, 0.90; 0.86-0.93) based on d-dimer, Wells score, age, and anticoagulation use, which is able to distinguish IFDVT patients from all patients suspected of DVT. CONCLUSIONS: This multivariate model adequately distinguishes IFDVT among all suspected DVT patients. Practically, this model could give each patient a preduplex risk score, which could be used to prioritize suspected IFDVT patients for an immediate imaging test to confirm or exclude IFDVT. Further validation studies are needed to confirm potential of this prediction model for IFDVT.

Asunto(s)

Vena Femoral , Vena Ilíaca , Síndrome Postrombótico/epidemiología , Síndrome Postrombótico/etiología , Síndrome Postrombótico/prevención & control , Trombosis de la Vena/complicaciones , Adulto , Anciano , Anciano de 80 o más Años , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Medición de Riesgo , Factores de Riesgo , Trombosis de la Vena/terapia

RESUMEN

BACKGROUND: Stenting of the iliofemoral vein may be an effective treatment to improve post-thrombotic symptoms. Iliofemoral vein stents have requirements different from those of lower extremity artery stents, and there is a paucity of literature regarding the biomechanical motion of the iliofemoral vein. METHODS: In a novel cadaveric model, stents were bilaterally inserted into the veins in the iliofemoral region. The veins were pressurized and underwent computed tomography angiography at various hip angle positions. In addition, 21 patients with iliofemoral vein disease had supine computed tomography angiography before and after stenting. The stents and vasculature were reconstructed into three-dimensional geometric models to quantify stent deformations and the interaction between the iliofemoral vein, inguinal ligament, and pubis bone due to hip flexion-extension. RESULTS: In the cadavers, from supine to 30 to 45 degrees and 50 to 75 degrees of hip flexion, iliofemoral vein stents became less compressed (4.5% minor diameter expansion), and the inguinal ligament was separated from the iliofemoral veins by 1 to 3 cm in all hip positions. In the patients, the pubis compressed 47% of femoral veins; 78% were within 3 mm of the pubis. There was also evidence of contrast-enhanced flow disruption at the superior ramus. CONCLUSIONS: The cadaver and clinical evidence shows that contrary to widely accepted dogma, the common femoral vein is not compressed by the inguinal ligament during hip flexion but rather by the superior ramus of the pubis during hip extension, which may have an impact on future stent design and influence deep venous thrombosis treatment strategies.

Asunto(s)

Procedimientos Endovasculares/instrumentación , Vena Femoral/diagnóstico por imagen , Articulación de la Cadera/fisiología , Stents , Trombosis de la Vena/terapia , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Fenómenos Biomecánicos , Cadáver , Angiografía por Tomografía Computarizada , Femenino , Humanos , Masculino , Persona de Mediana Edad , Posicionamiento del Paciente , Flebografía , Estudios Prospectivos , Diseño de Prótesis , Rango del Movimiento Articular , Resultado del Tratamiento , Trombosis de la Vena/diagnóstico por imagen , Adulto Joven

RESUMEN

BACKGROUND: After deep venous thrombosis (DVT), many patients have impaired quality of life (QOL). We aimed to assess whether pharmacomechanical catheter-directed thrombolysis (PCDT) improves short-term or long-term QOL in patients with proximal DVT and whether QOL is related to extent of DVT. METHODS: The Acute Venous Thrombosis: Thrombus Removal with Adjunctive Catheter-Directed Thrombolysis (ATTRACT) trial was an assessor-blinded randomized trial that compared PCDT with no PCDT in patients with DVT of the femoral, common femoral, or iliac veins. QOL was assessed at baseline and 1 month, 6 months, 12 months, 18 months, and 24 months using the Venous Insufficiency Epidemiological and Economic Study on Quality of Life/Symptoms (VEINES-QOL/Sym) disease-specific QOL measure and the 36-Item Short Form Health Survey (SF-36) physical component summary (PCS) and mental component summary general QOL measures. Change in QOL scores from baseline to assessment time were compared in the PCDT and no PCDT treatment groups overall and in the iliofemoral DVT and femoral-popliteal DVT subgroups. RESULTS: Of 692 ATTRACT patients, 691 were analyzed (mean age, 53 years; 62% male; 57% iliofemoral DVT). VEINES-QOL change scores were greater (ie, better) in PCDT vs no PCDT from baseline to 1 month (difference, 5.7; P = .0006) and from baseline to 6 months (5.1; P = .0029) but not for other intervals. SF-36 PCS change scores were greater in PCDT vs no PCDT from baseline to 1 month (difference, 2.4; P = .01) but not for other intervals. Among iliofemoral DVT patients, VEINES-QOL change scores from baseline to all assessments were greater in the PCDT vs no PCDT group; this was statistically significant in the intention-to-treat analysis at 1 month (difference, 10.0; P < .0001) and 6 months (8.8; P < .0001) and in the per-protocol analysis at 18 months (difference, 5.8; P = .0086) and 24 months (difference, 6.6; P = .0067). SF-36 PCS change scores were greater in PCDT vs no PCDT from baseline to 1 month (difference, 3.2; P = .0010) but not for other intervals. In contrast, in femoral-popliteal DVT patients, change scores from baseline to all assessments were similar in the PCDT and no PCDT groups. CONCLUSIONS: Among patients with proximal DVT, PCDT leads to greater improvement in disease-specific QOL than no PCDT at 1 month and 6 months but not later. In patients with iliofemoral DVT, PCDT led to greater improvement in disease-specific QOL during 24 months.

Asunto(s)

Vena Femoral , Fibrinolíticos/administración & dosificación , Vena Ilíaca , Trombolisis Mecánica , Calidad de Vida , Terapia Trombolítica , Trombosis de la Vena/terapia , Adulto , Femenino , Vena Femoral/fisiopatología , Fibrinolíticos/efectos adversos , Humanos , Vena Ilíaca/fisiopatología , Masculino , Trombolisis Mecánica/efectos adversos , Persona de Mediana Edad , Encuestas y Cuestionarios , Terapia Trombolítica/efectos adversos , Factores de Tiempo , Resultado del Tratamiento , Estados Unidos , Trombosis de la Vena/diagnóstico , Trombosis de la Vena/fisiopatología

RESUMEN

OBJECTIVE: The aim was to assess the anatomical distribution of acute deep venous thrombosis (DVT) with a focus on iliofemoral DVT, and, in particular, to characterise thrombus in the common femoral vein (CFV) and the deep femoral vein (DFV). METHODS: A one year prospective study including patients older than 18 years of age with an acute first time DVT according to ultrasound examination at one of three university hospitals in Copenhagen, Denmark. Thrombus location and extent were registered and divided into five segments: calf veins; popliteal vein; femoral and deep femoral vein; common femoral vein; and iliac veins and/or the inferior vena cava. Thrombus appearance of the CFV and the DFV (partial or occlusive) was examined in detail. RESULTS: Acute DVTs were identified in 203 extremities in 200 patients (58% male). The median age of the patients was 68 years (range 19-92 years), and left-sided DVT was observed in 56%. Iliofemoral DVT was present in 54 (27.0%) patients. Thrombus involving the CFV but not the iliac veins (CFV group) was seen in 28 patients; the remaining 26 had involvement of the iliac veins (iliac group). Thrombus in the CFV was more likely to be occlusive in the iliac group than in the CFV group (77% vs. 4%; p < .001). Thrombus in the DFV was more often occlusive in the iliac group than in the CFV group (81% vs. 11%; p < .001). The DFV was free of thrombus in 12% of patients in the iliac group and in 64% of those in the CFV group. CONCLUSION: The presence of occlusive thrombus in the CFV and/or in the DFV pointed to a DVT also involving the ipsilateral iliac veins. Thrombosis of the deep leg veins extending into the CFV below the inguinal ligament was more likely to be partial in the CFV, mainly due to inflow from the DFV.

Asunto(s)

Vena Femoral/diagnóstico por imagen , Vena Ilíaca/diagnóstico por imagen , Ultrasonografía Doppler en Color , Trombosis de la Vena/diagnóstico por imagen , Adulto , Anciano , Anciano de 80 o más Años , Dinamarca , Femenino , Vena Femoral/fisiopatología , Hemodinámica , Humanos , Vena Ilíaca/fisiopatología , Masculino , Persona de Mediana Edad , Valor Predictivo de las Pruebas , Pronóstico , Estudios Prospectivos , Trombosis de la Vena/fisiopatología , Adulto Joven

Asunto(s)

Anticoagulantes/uso terapéutico , Hemorragia/prevención & control , Trombosis de la Vena/tratamiento farmacológico , Administración Oral , Anticoagulantes/farmacología , Manejo de la Enfermedad , Relación Dosis-Respuesta a Droga , Esquema de Medicación , Femenino , Hemorragia/inducido químicamente , Humanos , Masculino , Pronóstico , Recurrencia , Medición de Riesgo , Índice de Severidad de la Enfermedad , Resultado del Tratamiento , Estados Unidos , United States Food and Drug Administration , Trombosis de la Vena/diagnóstico

RESUMEN

OBJECTIVE/BACKGROUND: For decades acute lower limb deep venous thrombosis (DVT) has been subdivided into distal DVT (isolated to the calf veins) and proximal DVT (extending above calf vein level). The aim of this study was to analyse the anatomical site and extent of thrombus in a large cohort of patients with acute DVT. METHODS: A retrospective analysis of all patients aged >18 years, presenting with unilateral DVT according to duplex ultrasound investigation was performed at the University Hospital of Antwerp, Belgium (1994-2012). The anatomical site and extent of thrombus was registered and subdivided into five segments: calf veins (segment 1), popliteal vein (segment 2), femoral vein (segment 3), common femoral vein (segment 4), and iliac veins, with or without inferior vena cava (segment 5). RESULTS: The median age of the 1,338 patients (50% male) included was 62 years (range 18-98 years). Left sided DVT was predominant (57%). DVT was limited to one segment in 443 patients, of whom 370 had DVT isolated to the calf veins (28% of total cohort). In 968 patients with what was previously called "proximal DVT", the median number of affected segments was three (range 1-5 segments). In this group iliofemoral DVT (at least involving segment four and/or five) was present in 506 patients (38% of total cohort), whereas the remaining patients had femoropopliteal DVT (at least in segment two and/or three but not in four or five). Iliofemoral DVT without thrombus in segments one and two was present in 160 patients (12% of total cohort). CONCLUSION: This study illustrates the large diversity of thrombus distribution in patients previously described as having "proximal DVT". Therefore, this term should be abandoned and replaced with iliofemoral and femoropopliteal DVT. Patients with iliofemoral DVT (38%) could be considered for early clot removal; 12% of all patients with DVT would be ideal candidates for such intervention.

Asunto(s)

Vena Femoral/diagnóstico por imagen , Vena Ilíaca/diagnóstico por imagen , Pierna/irrigación sanguínea , Vena Poplítea/diagnóstico por imagen , Ultrasonografía Doppler Dúplex/métodos , Trombosis de la Vena/diagnóstico por imagen , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Adulto Joven

RESUMEN

BACKGROUND: Postthrombotic intraluminal tissue causing postthrombotic syndrome (PTS) has not been well described. This study defines its histological characteristics and assess whether tissue function evolves over time. METHODS: Specimens from 18 common femoral veins (CFV) from 16 patients obtained during CFV endovenectomy and iliocaval recanalization were examined. Phase 1 used hematoxylin and eosin and Masson's trichrome stains for collagen, immunohistochemical, and Von Kossa stains. Phase 2 examined young (≤ one year) and mature (≥10years from acute DVT) specimens to evaluate evolution of endothelial function. Antibodies to four biomarkers were used to examine specific functions of endothelial cells lining neovessels and recanalization channels (RC). RESULTS: Phase 1: Specimens demonstrated 80-90% of collagen type I, 10-20% of collagen type III, and dystrophic calcification. Neovessels and RC were in close proximity to each other. Thrombus and smooth muscle cells were absent, but white blood cells were present. Phase 2: VEGFR2 receptor uptake was more abundant in neovessels than RC and more prominent in younger specimens. Neovascular, nonchannel cells were observed more frequently in young specimens. CD-31 was similar in young and mature specimens. TIE-2 and von Willebrand factor antibodies had greater uptake in mature specimens. CONCLUSION: Tissue causing chronic postthrombotic venous obstruction is predominantly type I collagen. Neovascularization and recanalization occur in close proximity. The biomarker for neovascularization and angiogenesis (VEGFR2) was more prominent in young specimens whereas TIE-2, a stabilizing biomarker and vWF were more frequently observed in mature specimens.

Asunto(s)

Síndrome Postrombótico/patología , Adulto , Factores de Edad , Anciano , Biomarcadores , Calcinosis/patología , Calcinosis/fisiopatología , Colágeno/análisis , Células Endoteliales/química , Endotelio Vascular/patología , Femenino , Vena Femoral/patología , Vena Femoral/cirugía , Humanos , Leucocitos/patología , Masculino , Persona de Mediana Edad , Neovascularización Patológica/etiología , Neovascularización Patológica/patología , Molécula-1 de Adhesión Celular Endotelial de Plaqueta/análisis , Síndrome Postrombótico/fisiopatología , Receptor TIE-2/análisis , Método Simple Ciego , Coloración y Etiquetado , Tromboflebitis/patología , Receptor 2 de Factores de Crecimiento Endotelial Vascular/análisis , Procedimientos Quirúrgicos Vasculares , Factor de von Willebrand/análisis

RESUMEN

Many factors are known to be important in order to achieve optimal results after thrombus removal for iliofemoral DVT. Not much is published in the literature about timing the treatment, though many guidelines recommend treatment within 14 days. This time span lies within the phrase of acute DVT according to the definition given in many reporting standards. This article will highlight the value of information acquired from patients directly regarding onset of symptoms versus information acquired from imaging with the purpose of a more precise selection of patients for catheter-directed thrombolysis for iliofemoral DVT. What is the value of clinical information acquired from patients and does the information from imaging have additional value?

Asunto(s)

Vena Femoral , Vena Ilíaca , Terapia Trombolítica , Trombosis de la Vena , Enfermedad Aguda , Animales , Vena Femoral/patología , Vena Femoral/fisiopatología , Humanos , Vena Ilíaca/patología , Vena Ilíaca/fisiopatología , Trombosis de la Vena/tratamiento farmacológico , Trombosis de la Vena/patología , Trombosis de la Vena/fisiopatología

RESUMEN

Many factors are necessary for obtaining satisfactory results after catheter-directed thrombolysis (CDT) for iliofemoral deep venous thrombosis (DVT). Selections of patients, composition of the thrombolytic fluid, anticoagulation per- and post-procedural, recognition and treatment of persistent obstructive lesions of the iliac veins are the most important contributors. Stenting has been known for 15 to 20 years. The first publication on CDT in 1991 was combined with ballooning the iliac vein, an additive procedure which has been abandoned as an isolated procedure. This chapter will discuss selection, indication, such as an iliac compression syndrome, and outcome of iliac stenting in combination with CDT. The reported frequency of stenting used after CDT is very inconsistent, therefore this will be discussed in details. It is concluded that selection for stenting is of the greatest importance, when CDT is used for iliofemoral DVT, but strict criteria for stenting are not available in the existing literature. The potential value of intravascular ultrasound (IVUS) is also discussed.

RESUMEN

Practicing interventional radiologists (IRs) are routinely faced with challenging decisions that pertain to the management of patients with acute deep vein thrombosis (DVT). In this article, we describe five questions that are commonly posed by interventionalists and discuss both the indirect published evidence as well as our own experience in dealing with these issues. Our aim is to address procedural and, perhaps more importantly, nonprocedural-related knowledge domains with which the IR physician is less familiar and are often not directly addressed by published data or evidence-based clinical practice guidelines. This discussion is meant to facilitate a stronger understanding of the published literature as it pertains to the justifiable indications for endovascular thrombolytic therapy, the optimal use of anticoagulant therapy, and the reasonable use of adjuncts such as inferior vena cava filters and elastic compression stockings. Our goal is to provide a framework for practicing IRs to help them make the best clinical decisions for their individual patients and, ultimately, achieve optimal DVT treatment outcomes.