Colapso proximal de una endoprótesis de aorta abdominal: reparación endovascular / Proximal abdominal aortic endograft collapse: endovascular repair

Introducción: el colapso de una endoprótesis en la aorta abdominal constituye una complicación muy poco frecuente, normalmente debida a una mala aposición de la prótesis sobre la pared arterial. La reparación endovascular suele ser la modalidad más utilizada para realinear el dispositivo, aunque no existe una actuación protocolizada. Caso clínico: presentamos el caso de un varón de 67 años diagnosticado de colapso precoz asintomático de una endoprótesis de aorta abdominal con una endofuga de tipo Ia. La tomografía computarizada reveló una invaginación severa del segmento proximal de la endoprótesis, así como un marcado crecimiento del saco aneurismático en el primer mes. Se implantó un stent balón expandible para realinearla de nuevo y reforzar el cuello, con excelente resultado. Discusión: las técnicas endovasculares, como la implantación de un stent, parecen una opción segura para volver a alinear el extremo proximal de una endoprótesis tras su colapso.(AU)

Introduction: in the abdominal aorta, device infolding or collapse is an extremely rare complication, usually related to a poor apposition of the proximal end of the device at the time of intervention. Endovascular repair is the most widely used modality to realign the device. However, there is no consensus on the management. Case report: we present a case of a 67-year-old man with early endograft infolding of the abdominal aorta associated with type Ia endoleak. The patient was asymptomatic, without ischemic limb complications. Computed tomography angiography reveled severe invagination of the proximal end of the stent graft, and marked growth of the aneurysm sac during the first month of follow-up. We decided to start by expanding the proximal sealing stent with balloon angioplasty. Finally, we used a balloon-expandable stent to realign and reinforce the proximal end of the endograft. This endovascular technique may be an effective endovascular adjunct to treat abdominal endograft collapses. Discussion: endovascular repair, as stent implantation, may be a secure option to realign the proximal end of the endoprosthesis after its collapse.(AU)

Iliac Arteries Dissection with a Rapid Dilatation as Debut of Fibromuscular Dysplasia.

We report a case of a 38-year-old male diagnosed with fibromuscular dysplasia (FMD) and a dissection of both common iliac arteries without aortic involvement. It was revealed after an inguinal hematoma and a pelvic pain, which are not the typical FMD presentation. Surgical treatment was performed after a rapid iliac growth in the first month control computed tomography angiography. Although the clinical course of this entity is relatively benign, rupture of the common iliac artery has also been described.

Cystic adventitial degeneration of the popliteal artery: report on 3 cases and review of the literature.

BACKGROUND: Cystic adventitial disease (CAD) is a rare, nonatherosclerotic vascular condition predominantly seen in middle-aged men with no cardiovascular risk factors. Three cases have been diagnosed and treated in our institution during the past 8 years. The purpose of this report is to provide an updated literature review of this condition with the addition of 3 new cases. METHODS: Information about 3 new cases is presented along with data obtained from articles published between 1979 and 2012 from PubMed and Embase databases. Two hundred thirty-eight articles were found, and 98 were included in our review. RESULTS: All patients treated presented with rapidly progressive intermittent calf claudication. Diagnosis of CAD was confirmed by at least 2 imaging techniques, either duplex ultrasound or magnetic resonance imaging, with a preoperative angiography performed in all cases. Wall cyst resection was performed in the 3 cases reported here, after intraoperative confirmation that there was no arterial wall damage. All patients remained asymptomatic with no signs of recurrence after a median 36-month follow-up (24-60 month follow-up). CONCLUSIONS: CAD is a rare vascular condition usually affecting arteries that presents as a sudden onset of unilateral intermittent calf claudication. Diagnosis must be confirmed with imaging techniques, such as duplex ultrasonography and magnetic resonance imaging. On the basis of existing knowledge, surgery remains the treatment of choice, with cystic evacuation in cases with no arterial wall damage or resection and grafting. However, the follow-up algorithm for treated patients remains unclear.

¿Está justificado el seguimiento ecográfico de las fístulas arteriovenosas protésicas húmero-axilares para hemodiálisis? / Is ultrasound follow-up necessary in humero-axillary prosthetic arteriovenous fistulas for haemodialysis?

Objetivo: Evaluar el impacto de una consulta específica de accesos vasculares (C-FAV) con seguimiento intensivo en la permeabilidad de las fístulas húmero-axilares. Pacientes y método: Estudio retrospectivo. Entre enero de 2005 y diciembre de 2009 se realizan 108 fístulas húmero-axilares. Desde junio de 2007 se establece una C-FAV. Se realiza eco-doppler preoperatorio y seguimiento posterior al mes de la intervención y, después, cada 3 meses. Resultados: Se analizan las permeabilidades de 57 fístulas húmero-axilares realizadas desde junio de 2007 hasta diciembre de 2009 (grupo C-FAV), comparándolas con 51 realizadas durante los 30 meses previos (grupo control). No se encontraron diferencias en la permeabilidad obtenida entre ambos grupos a 12 y 24 meses, con una permeabilidad secundaria a los 12 meses de 49% en el grupo C-FAV y 52% en el grupo control. El porcentaje de pacientes reintervenidos fue inferior en el grupo C-FAV (35%) que en el grupo control (67%), p = 0,002. La media de reintervenciones realizadas por paciente fue menor en C-FAV que en grupo control (0,49 vs. 1,18, p = 0,01). Los pacientes del grupo C-FAV presentaron un menor número de reintervenciones por obstrucción frente al grupo control (0,42 vs. 1,04, p = 0,01). Conclusiones: En nuestra experiencia, el seguimiento intensivo no ha mejorado la permeabilidad de las fístulas húmero-axilares, disminuyendo no obstante las reintervenciones por obstrucción. El seguimiento de estos accesos debe ser clínico basado en datos de hemodiálisis, quedando la valoración ecográfica para aquellos casos con sospecha de malfunción (AU)

Aim: To evaluate the impact of a specific vascular access (arteriovenous fistula) unit (AVF-U) and intensive follow-up controls on the patency of humero-axillary fistulas (Hax-AVF). Patients and method: Retrospective study. Between January 2005 and December 2009, 108 Hax-AVF were implanted. From June 2007 an AVF-U was established. A preoperative Doppler ultrasonography analysis was performed and a follow-up control carried out a month after the intervention and subsequently every 3 months. Results: An analysis was made of the patency of 57 Hax-AVF performed between June 2007 and December 2009 (AVF-U Group), in comparison to 51 interventions performed during the previous 30 months (Control Group). No differences in the patency achieved were found at 12 or 24 months, with a secondary permeability at 12 months of 49% in the AVF-U Group and 52% in the Control Group. The percentage of patients needing to be reoperated was lower in the AVF-U Group (35%) than in the Control Group (67%) (P=.02). The mean number of re-operations per patient was lower in the AVF-U Group than in the Control Group (0.49 vs 1.18; P=.01). The patients of the AVF-U Group underwent fewer reoperations for obstruction as compared to the Control Group (0.42 vs 1.04; P=.01). Conclusions: In our experience, the intensive follow-up controls did not improve the patency of the Hax-AVF, although reoperations due to obstruction did diminish. The follow-up of these fistulas should be clinically based on haemodialysis data, leaving ultrasound evaluation for those cases where AVF failure is suspected (AU)

Is ultrasound follow-up necessary in humero-axillary prosthetic arteriovenous fistulas for haemodialysis?

AIM: To evaluate through a specific trial on vascular access fistulas (T-VAF), the impact of intensive follow-up controls on the permeability of humero-axillary fistulas (Hax-AVF). PATIENTS AND METHOD: Retrospective study. Between January 2005 and December 2009, 108 Hax-AVF were implanted. From June 2007 a T-AVF was established. A preoperative duplex was performed and a follow-up control carried out a month after the intervention and subsequently every 3 months. RESULTS: An analysis was made of the permeability of 57 Hax-AVF carried out between June 2007 and December 2009 (T-AVF Group), in comparison to 51 interventions performed during the previous 30 months (Control Group). No differences in the permeability achieved were found at 12 and 24 months, with a secondary permeability at 12 months of 49% in the T-AVF Group and 52% in the Control Group. The percentage of patients needing to be re-operated was inferior in the T-AVF Group (35%) than in the Control Group (67%) p=0.02. The re-operation per patient average was lower in the T-AVF Group than in the Control Group (0.49 vs. 1.18 p=0.01). The patients of the TAVF Group underwent a lesser number of re-operations for obstruction as opposed to the Control Group (0.42 vs 1.04 p=0.01). CONCLUSIONS: In our experience, the intensive follow-up controls did not improve the permeability of the Hax-AVF, although re-operations due to obstruction did diminish. The follow-up of these access fistulas should be clinical based on hemodialysis data, leaving ultrasonographic evaluation for those cases where a malfunction is suspected.