Aneurysmal bone cysts in the spine, causing neurological compromise: safety and clinical efficacy of sclerotherapy utilizing sodium Tetradecyl sulfate foam.

OBJECTIVE: To assess the clinical efficacy, technical feasibility, and safety profile of percutaneous sclerotherapy utilizing sodium tetradecyl-sulfate foam (STS) as a first-line treatment strategy for aggressive spinal aneurysmal bone cysts (sABCs) presenting with neurological compromise. MATERIALS AND METHODS: Between July 2013 and September 2019, eight consecutive patients (5 males; 3 females; mean age 22±17, range 7-52) underwent fluoroscopic/CT-guided intraosseous sclerotherapy for sABCs. Pain and/or neurological compromise was the primary indications. Procedural data, complications, imaging, and clinical results were analyzed. RESULTS: Technical success was achieved in all cases. Mean procedure time was 25±15 min (range 6-167); 1 to 5 repeat treatment cycles (mean 3.7±1.2) utilizing a mean 2.6mls±1.3 (range 1-6) of agitated 3% STS, with a DLP mean dose of 158±91 mGy*cm (range 62-331) per procedure. One reported a minor complication (pain), but no significant complications. Two patients had persistent neurological deficit due to cord compression despite successful sclerotherapy, requiring surgical resection (and were thereby excluded from the final outcome analysis). The remaining six patients demonstrated a significant reduction in tumor volume (p = 0.028), pain (p = 0.027), and SINS (spinal instability neoplastic score) (p = 0.027) at up to 5 years of follow-up (mean 20 ± 16.7, range 7-51 months). CONCLUSION: Percutaneous sclerotherapy with STS is a minimally invasive, technically feasible, safe, and effective first-line treatment for primary sABCs causing pain and neurological compromise, alleviating the need for extensive surgery. It is most effective with three or more treatment cycles, in patients with higher SINS, pain scores, or tumor volumes at the initial presentation.

Effects of Sublingual Glyceryl Trinitrate Administration on the Quality of Preprocedure CT Angiography Performed to Plan Prostate Artery Embolization.

PURPOSE: To determine the effects of sublingual glyceryl trinitrate (GTN) on the quality of planning computed tomography (CT) angiography performed prior to prostate artery embolization (PAE). MATERIALS AND METHODS: A retrospective cohort study was performed on patients who had previously undergone CT angiography before a procedure for PAE at our institution. Early CT angiography studies for PAE at our single center had initially been performed without GTN. These were compared to subsequent CT angiography studies that had been performed with GTN, after a previously implemented change in practice. Prostate arteries were examined by 2 blinded observers for peak enhancement (Hounsfield units [HU]) and lumen diameter. In addition, assessors' interpretation of the prostate artery origin from CT angiography was compared with the true anatomy demonstrated at the time of procedure. RESULTS: A total of 16 patients, corresponding to 32 prostate arteries, were examined on CT angiography. Mean diameter of the prostate artery was found to be significantly greater in those receiving GTN (2.2 mm vs. 1.6 mm, P < .001). Peak prostate artery enhancement was also greater in the GTN group (218 HU vs 173 HU, P = 0.042). Observers correctly identified the prostate artery origin more frequently in the GTN group; however, this difference was not statistically significant (56% vs 25%, odds ratio = 3.9, P = .149). CONCLUSIONS: The administration of sublingual GTN immediately prior to CT angiography is associated with a significant increase in prostate artery diameter and peak opacification. This was not associated with a statistically significant increase in the ability of observers to correctly identify the origin of the prostate artery.

The role of intravascular ultrasound in lower limb revascularization in patients with peripheral arterial disease.

INTRODUCTION: The aim of this review is to explore the safety and effectiveness of intravascular ultrasound (IVUS) during lower limb endovascular interventions in patients with peripheral arterial disease (PAD). EVIDENCE ACQUISITION: A systematic review of the PubMed and Scopus databases was performed according to PRISMA guidelines. Clinical studies evaluating IVUS as an adjunct to angiography during revascularization procedures in patients with PAD were included. EVIDENCE SYNTHESIS: Thirteen studies were identified, with a total number of 2258 patients having had IVUS for PAD intervention. Seven investigated the role of IVUS for angioplasty and stenting, with the majority being retrospective cohorts. Technical success and patency rates ranged from 90-100% and 45-100%, respectively, with a follow-up that ranged from 4.3-63 months. Three of these studies compared IVUS and non-IVUS guided angioplasty and demonstrated a significant difference in the events of amputations or re-interventions in favor of the IVUS group. Furthermore, five studies evaluated IVUS use in true-lumen re-entry, with the technical success ranging between 97-100%. In one study, where IVUS was used for atherectomy, the technical success was 100% and the long-term patency was 90% during a 12-month follow-up. Overall, no significant peri/postoperative IVUS related complications were reported, whereas, 2 studies suggested an IVUS-associated increase in procedure costs that ranged from $1080-$1333. CONCLUSIONS: There is limited and heterogeneous evidence regarding the use of IVUS for the management of PAD. Further research is required to elucidate the optimal role of IVUS in PAD as well as the cost effectiveness of this approach for routine use in the management of PAD.

Preliminary Dual-Center Experience with the Bolton Treovance Endograft.

PURPOSE: To present the performance and safety of the Treovance stent graft for endovascular aortic aneurysm repair in a "real-world" patient cohort. METHODS: Patients from 2 centers, deemed unfit for open repair, were electively treated with the Treovance endograft. Clinical preoperative, operative, and up to 1-year postoperative follow-up data of patients were retrospectively analyzed. RESULTS: This study included 46 patients with abdominal aortic aneurysm (44 male), mean age of 78 years ± 8 standard deviation (SD; range: 58-93 years). All met the manufacturer's recommended anatomical requirements: average maximum sac diameter 63 mm ± 10 SD (range: 52-86 mm), proximal neck length 29 mm ± 12 SD (range: 11-60 mm), and neck angulation 30° ± 21 SD (range: 0°-70°). Fourteen had moderate to severe iliac tortuosity. A primary technical success rate of 80% was achieved (100% assisted primary technical success rate): 7 patients required adjunctive procedures intraoperatively and 2 successful treatments for type I endoleaks, which occurred within 24 hours postoperatively. There was 100% survival at 1-year follow-up; however, 4 (8.7%) patients required reintervention: 1 for a type I endoleak, 2 for limb stenosis, and 1 for a type II endoleak with an enlarging sac. No other device-related complications were identified. Reintervention and complication rates in hostile versus nonhostile anatomies were not statistically significant ( P = .28 and P = .42, respectively). CONCLUSION: The Treovance stent graft has a comparable safety profile to other next-generation stent grafts during the first year after endovascular aneurysm repair, which provides a rationale for further interrogation of its outcomes through clinical trials.

Closure Devices for Iatrogenic Thoraco-Cervical Vascular Injuries.

INTRODUCTION: The unintentional arterial placement of a central venous line can have catastrophic complications. The purpose of this systematic review is to assess and analyse the available evidence regarding the use of the various vascular closure devices (VCDs) for the management of iatrogenic thoraco-cervical arterial injuries (ITCAI). METHODS: A systematic review was performed according to PRISMA guidelines. RESULTS: Thirty-two relevant case series and case reports were identified with a total of 69 patients having being studied. In the majority of the studies, plug-based VCDs were used (81%) followed by suture-based devices (19%). The majority of studies reported successful outcomes from the use of VCDs in terms of achieving immediate haemostasis without any acute complications. Long-term follow-up data were only available in nine studies with only one case of carotid pseudoaneurysm being reported after 1-month post-procedure. All other cases had no reported long-term complications. Five studies performed direct or indirect comparisons between VCDs and other treatments (open surgery or stent grafting) suggesting no significant differences in safety or effectiveness. CONCLUSION: Although there is limited evidence, VCDs appear to be safe and effective for the management of ITCAIs. Further research is warranted regarding the effectiveness of this approach in comparison to surgery and in order to identify those patients who are more likely to benefit from this minimally invasive approach.

Efficacy and Safety of Augmenting the Preclose Technique with a Collagen-Based Closure Device for Percutaneous Endovascular Aneurysm Repair.

PURPOSE: To report our experience of selectively augmenting the preclose technique for percutaneous endovascular aneurysm repair (p-EVAR) with an Angio-Seal device as a haemostatic adjunct in cases of significant bleeding after tensioning the sutures of the suture-mediated closure devices. MATERIALS AND METHODS: Prospectively collected data for p-EVAR patients at our institute were analysed. Outcomes included technical success and access site complications. A logistic regression model was used to analyse the effects of sheath size, CFA features and stent graft type on primary failure of the preclose technique necessitating augmentation and also on the development of complications. RESULTS: p-EVAR was attempted via 122 CFA access sites with a median sheath size of 18-French (range 12- to 28-French). Primary success of the preclose technique was 75.4% (92/122). Angio-Seal augmentation was utilised as an adjunct to the preclose technique in 20.5% (25/122). The overall p-EVAR success rate was 95.1% (116/122). There was a statistically significant relationship (p = 0.0093) between depth of CFA and primary failure of preclose technique. CFA diameter, calcification, type of stent graft and sheath size did not have significant effects on primary preclose technique failure. Overall 4.9% (6/122) required surgical conversion but otherwise there were no major complications. CONCLUSION: Augmentation with an Angio-Seal device is a safe and effective adjunct to increase the success rate of the preclose technique in p-EVAR.

Outcome following a negative CT Angiogram for gastrointestinal hemorrhage.

OBJECTIVE: This study was designed to evaluate the role of a negative computed tomography angiogram (CTA) in patients who present with gastrointestinal (GI) hemorrhage. METHODS: A review of all patients who had CTAs for GI hemorrhage over an 8-year period from January 2005 to December 2012 was performed. Data for patient demographics, location of hemorrhage, hemodynamic stability, and details of angiograms and/or the embolization procedure were obtained from the CRIS/PACS database, interventional radiology database, secure electronic medical records, and patient's clinical notes. RESULTS: A total of 180 patients had 202 CTAs during the 8-year period: 87 CTAs were performed for upper GI hemorrhage (18 positive for active bleeding, 69 negative) and 115 for lower GI hemorrhage (37 positive for active bleeding, 78 negative); 58.7 % (37/63) of patients with upper GI bleed and 77.4 % (48/62) of patients with lower GI bleed who had an initial negative CTA did not rebleed without the need for radiological or surgical intervention. This difference was statistically significant (p = 0.04). The relative risk of rebleeding, following a negative CTA, in lower GI bleeding versus upper GI bleeding patients is 0.55 (95 % confidence interval 0.32-0.95). CONCLUSIONS: Patients with upper GI bleed who had negative CTAs usually require further intervention to stop the bleeding. In contrast, most patients presenting with lower GI hemorrhage who had a negative first CTA were less likely to rebleed.

Surveillance after endovascular abdominal aortic aneurysm repair.

Surveillance after endovascular abdominal aortic aneurysm repair (EVAR) is widely considered mandatory. The purpose of surveillance is to detect asymptomatic complications, so that early secondary intervention can prevent late aneurysm rupture. CT angiography has been taken as the reference standard imaging test, but there is increasing interest in using other modalities to reduce the use of ionising radiation and iodinated contrast. As a result, there is wide heterogeneity in surveillance strategies used among EVAR centres. We reviewed the current evidence available on the outcomes of different imaging modalities and surveillance strategies following EVAR.

Retrograde transileal conduit stent placement for obstructed uropathy--success of primary and exchange stent placement.

PURPOSE: To assess the safety, success, and complications associated with retrograde ureteric stent insertion via the ileal conduit. MATERIALS AND METHODS: The study population comprised 35 consecutive patients (17 men and 18 women; mean age, 55 y; age range, 40-75 y) requiring primary (20 stents) and exchange (70 stents) retrograde ureteric stent insertion via the ileal conduit over a 3-year period. Patient demographic data, procedural and technical data, and clinical follow-up data were collected. RESULTS: Technical success was 90% (18 of 20) for primary stent placement and 100% (70 of 70) for stent exchange. There were two immediate complications (< 24 h) of sepsis and ureteric injury and one early complication (> 25 h but < 30 d) of sepsis requiring observation and medical management. Difficult procedures (defined as a fluoroscopy screening time > 31 min) and technical failures were found to be associated with encrusted stents visualized on prior computed tomography (P = .012), increased length of ileal conduit (> 20 cm) (P = .023), and ileal conduit kink (< 90 degrees) (P = .032). Only the occurrence of encrusted stents visualized on prior computed tomography (P = .022) was associated with complications. CONCLUSIONS: Retrograde placement of ureteric stents via the ileal conduit is safe and effective. Retrograde stent placement should be considered the treatment option of choice for a first-time occurrence of obstructive uropathy at the ureteroileal anastomosis.

The changing face of vascular interventional radiology: the future role of pharmacotherapies and molecular imaging.

Interventional radiology has had to evolve constantly because there is the ever-present competition and threat from other specialties within medicine, surgery, and research. The development of new technologies, techniques, and therapies is vital to broaden the horizon of interventional radiology and to ensure its continued success in the future. In part, this change will be due to improved chronic disease prevention altering what we treat and in whom. The most important of these strategies are the therapeutic use of statins, Beta-blockers, angiotensin-converting enzyme inhibitors, and substances that interfere with mast cell degeneration. Molecular imaging and therapeutic strategies will move away from conventional techniques and nano and microparticle molecular technology, tissue factor imaging, gene therapy, endothelial progenitor cells, and photodynamic therapy will become an important part of interventional radiology of the future. This review looks at these new and exciting technologies.

Is there a role for empiric gastroduodenal artery embolization in the management of patients with active upper GI hemorrhage?

PURPOSE: To assess the relative efficacy of empiric gastroduodenal artery (GDA) embolization in reducing recurrent hemorrhage compared to image-guided targeted embolization. METHODS: Data were retrospectively collected for consecutive patients who had catheter angiography for major upper gastrointestinal hemorrhage from May 2008 to November 2010 (n = 40). The total number of cases were divided into two main groups according to angiographic findings: those that demonstrated a site of hemorrhage on catheter angiography (group 1, n = 13), and those where the site of hemorrhage was not identified on catheter angiography (group 2, n = 27). Group 2 was then further divided into patients who received empiric embolization (group 2a, n = 20) and those who had no embolization performed after angiography (group 2b, n = 7). RESULTS: The technical and clinical success rates for embolization in groups 1 and 2a were, respectively, 100 vs. 95%, and 85 vs. 80%. There was no statistical significance in the recurrent hemorrhage rate, reintervention rate, or 30 day mortality between targeted and empiric embolization groups. There were no complications attributed to embolization within this study cohort. CONCLUSION: Cases of duodenal-related major upper gastrointestinal hemorrhage where no embolization is performed have poor outcome. Empiric embolization of the GDA in patients with major upper gastrointestinal hemorrhage refractory to endoscopic treatment appears to be a safe and effective treatment, with low reintervention rates and good clinical outcome comparable to patients where the site of hemorrhage is localized and embolized with computed tomographic angiography or catheter angiography and embolized.

Successful fibroid embolization of pelvic and inferior mesenteric artery collaterals after previous uterine artery embolization.

A 47-year-old woman with a history of myomectomies and uterine artery embolization 15 years previously presented with increasing menorrhagia and dysmenorrhea. Magnetic resonance imaging (MRI) demonstrated multiple enhancing fibroids, extensive uterine supply from what appeared to be patent uterine arteries, and significant supply from what appeared to be the left ovarian artery. Aortography demonstrated no ovarian supply, but extensive collateral supply from distal branches of the inferior mesenteric artery (IMA), with further collateral supply from the anterior division of both internal iliac arteries. There was no filling of the uterine arteries distal to the coils. Embolization was performed with technical and clinical success. This case highlights the potential for recruitment of collateral vessels following coil embolization and is the first reported case of successful fibroid embolization from distal IMA branches.

Uterine artery embolization versus myomectomy: impact on quality of life--results of the FUME (Fibroids of the Uterus: Myomectomy versus Embolization) Trial.

PURPOSE: This study was designed to compare quality of life (QoL) outcomes after uterine artery embolization (UAE) or myomectomy. METHODS: Women with symptomatic fibroids diagnosed by ultrasound who wished to preserve their uterus were randomized to myomectomy (n=81) or UAE (n=82). Endpoints at 1 year were QoL measured by a validated questionnaire, hospital stay, rates of complications, and need for reintervention. RESULTS: UAE patients had shorter hospitalization (2 vs. 6 days, p<0.001). By 1 year postintervention, significant and equal improvements in QoL scores had occurred in both groups (myomectomy n=59; UAE n=61). There had been two (2.9%) major complications among UAE versus 6 (8%) among myomectomy patients (not significant). By 2 years, among UAE patients (n=57) there were eight (14.0%) reinterventions for inadequate symptom control compared with one (2.7%) among myomectomy patients (n=37). Half of the women who required hysterectomy had concomitant adenomyosis missed by US. CONCLUSIONS: UAE and myomectomy both result in significant and equal improvements in QoL. UAE allows a shorter hospital stay and fewer major complications but with a higher rate of reintervention.