Improved emergency activation in interventional radiology reduces procedure delay and facilitates treatment success in patients with acute arterial bleedings.

Background: Research of interventional treatment success in arterial bleeding cases is almost exclusively focused on technical and procedural factors. This study investigates the effect of an improved preprocedural activation algorithm for acute arterial bleedings treated by interventional radiology.

Methods: During the three-year study period (2018-2021), the authors implemented an always-reachable, simple-to-remember emergency phone number routed to the responsible interventional radiologist on call and compared this pathway to the previous activation process.

Transjugular intrahepatic portosystemic shunt creation (TIPS) in the angio-CT-a hybrid intervention with image fusion.

Objective: For transjugular intrahepatic portosystemic shunt (TIPS) creation, ultrasound guidance for portal vein puncture is strongly recommended. However, outside regular hours of service, a skilled sonographer might be lacking. Hybrid intervention suites combine CT imaging with conventional angiography allowing to project 3D information into the conventional 2D imaging and further CT-fluoroscopic puncture of the portal vein.

Safety of sheathless vascular access using braided 4 F selective catheters for common body interventions - a retrospective study.

Background: Besides other factors, complication rate of transarterial interventions depends on the size of the vascular access. Therefore, the vascular access is mostly chosen as small as possible while still allowing all planned parts of the intervention. This retrospective analysis is to evaluate the safety and feasibility of sheathless arterial interventions for a broad spectrum of interventions in daily practice.

Efficacy of ultrasound assisted catheter-directed thrombolysis compared to catheter-directed thrombolysis in vitro.

Background: Catheter-directed thrombolysis (CDT) is an effective and safe endovascular method used in critical limb ischemia and many other thromboembolic events. Ultrasound-assisted catheter-directed thrombolysis (US-CDT) is an emerging technique considered to accelerate thrombolysis and therefore is supposed to improve outcome.

Purpose: To evaluate the efficacy of US-CDT in comparison to standard CDT in vitro.

Risk factors assessment for radiographically guided port implantations with forearm access.

Introduction: Port implantations at the forearm are associated with an increased risk of relevant vein thrombosis. Therefore, with this study we sought to identify the responsible risk factors to improve technical quality of the method.

Methods: This is a retrospective analysis of 313 patients with port implantation at the forearm in 2019.

[Comparison of radiation exposure in common hepatic interventions : A retrospective analysis of DeGIR registry data].

Background: Transcatheter arterial chemoembolization (TACE) and biliary interventions are common procedures.

Objectives: In this retrospective study, the radiation exposure of patients undergoing hepatic intervention will be analyzed and compared depending on the type and objective of the intervention.

Materials And Methods: This is an analysis of 7003 data sets of performed TACEs and biliary interventions from the DeGIR registry for the years 2016, 2017, and 2018.

Retrospective outcome analysis of rates and types of complications after 8654 minimally invasive radiological port implantations via the subclavian vein without ultrasound guidance.

Purpose: To evaluate the rate and types of complications after minimally invasive radiological central vein port implantation without ultrasound guidance.

Materials And Methods: We retrospectively evaluated 8654 patients who underwent port implantations in the subclavian vein without ultrasound guidance in our institution from 1998 to 2014 with regard to types and rates of peri-, early and late post-interventional complications according to the common classification for complications published by the Society of Interventional Radiology (SIR). Additionally, the impact of the training level of the operators on the rate of complications was analyzed.

In vitro study of physical properties of various embolization particles regarding morphology before, during and after catheter passage.

Objective: To evaluate various embolization particles on their physical properties with special regard on morphological variability and elasticity.

Methods: 8 embolization particles (EmboCept®, Contour SE® Microspheres, Embosphere® Micorspheres 400 μm, 500 μm, 1300 μm, Embozene® Microspheres, DC Beads®, Embozene Tandem®) were evaluated and graduated from 1-6 microscopically due to morphologic changes in vitro before, during and after their catheter passage by 4 blinded reviewers. To facilitate comparison, microscopic images were provided with a scale.

Comparative study of the corrosion behavior of peripheral stents in an accelerated corrosion model: experimental in vitro study of 28 metallic vascular endoprostheses.

Purpose: Clinical cases of stent-fractures show that corrosion behavior might play a role in these fractures. Implanted in vivo, especially in combination with other implanted foreign materials, these metallic products are exposed to special conditions, which can cause a process of corrosion. Here, we aimed to test the corrosion potential of stents made of different materials in an in vitro setting.

C-arm computed tomography compared with positron emission tomography/computed tomography for treatment planning before radioembolization.

The purpose of this study was to determine whether rotational C-arm computed tomography (CT) allows visualization of liver metastases and adds relevant information for radioembolization (RE) treatment planning. Technetium angiography, together with C-arm CT, was performed in 47 patients to determine the feasibility for RE. C-arm CT images were compared with positron emission tomography (PET)/CT images for the detection of liver tumors.

Combined supra-aortic extra-anatomic revascularization and endovascular hybrid procedure for recurrent hemoptysis caused by a symptomatic aneurysm of the right subclavian artery.

Acute hemoptysis might be caused by aneurysms of the subclavian artery. We report a 75-year-old female patient presenting with recurrent hemoptysis, dyspnea, fever, and episodes of unclear pneumonia. Further examination revealed a large intrathoracic aneurysm of the right subclavian artery.

Congenital intrarenal arteriovenous malformation presenting with gross hematuria after endoscopic intervention: a case report.

Introduction: Although diagnostic ureterorenoscopy is a minimally invasive and effective diagnostic procedure, it has the potential for significant postoperative complications. We report the first case in the literature of intrarenal arteriovenous fistulas causing hemodynamic effective anemia 4 days after ureterorenoscopic biopsy.

Case Presentation: A 63-year-old Caucasian woman presented with hemodynamic effective macrohematuria (hemoglobin 70 g/liter) 4 days after ureterorenoscopy and biopsy of the upper pole collecting system due to recurrent microhematuria.

Chemoembolization combined with pravastatin improves survival in patients with hepatocellular carcinoma.

Background/aims: Pravastatin, a 3-hydroxy-3-methylglutaryl coenzyme A reductase inhibitor, has been shown to inhibit growth and to induce apoptosis in human hepatocellular carcinoma (HCC) cells. However, the potential benefit of pravastatin in HCC patients has still not been characterized, which prompted us to test the efficacy of pravastatin in patients with advanced HCC.

Methods: We investigated prospectively a cohort of 183 HCC patients who had been selected for palliative treatment by transarterial chemoembolization (TACE).

Liver resection or combined chemoembolization and radiofrequency ablation improve survival in patients with hepatocellular carcinoma.

Background/aims: To evaluate the long-term outcome of surgical and non-surgical local treatments of patients with hepatocellular carcinoma (HCC).

Methods: We stratified a cohort of 278 HCC patients using six independent predictors of survival according to the Vienna survival model for HCC (VISUM-HCC).

Results: Prior to therapy, 224 HCC patients presented with VISUM stage 1 (median survival 18 months) while 29 patients were classified as VISUM stage 2 (median survival 4 months) and 25 patients as VISUM stage 3 (median survival 3 months).

Immediate endovascular treatment of an aortoiliac aneurysm ruptured into the inferior vena cava.

An aortocaval fistula is a severe complication of an aortoiliac aneurysm, usually associated with high perioperative morbidity and mortality during open operative repair. We describe the successful endovascular treatment of a symptomatic infrarenal aortic aneurysm ruptured into the inferior vena cava with secondary interventional coiling of a persistent type II endoleak because of retrograde perfusion of the inferior mesenteric artery. Endovascular exclusion of ruptured abdominal aneurysms seems to be a valuable treatment option for selected patients even with complicated vascular conditions like an aortocaval fistula.

High-spatial-resolution MR angiography of renal arteries with integrated parallel acquisitions: comparison with digital subtraction angiography and US.

Purpose: To retrospectively compare three-dimensional gadolinium-enhanced magnetic resonance (MR) angiography, performed with an integrated parallel acquisition technique for high isotropic spatial resolution, with selective digital subtraction angiography (DSA) and intravascular ultrasonography (US) for accuracy of diameter and area measurements in renal artery stenosis.

Materials And Methods: The study was approved by the institutional review board, and consent was obtained from all patients. Forty-five patients (17 women, 28 men; mean age, 62.

Improved quality of life in patients with refractory or recidivant ascites after insertion of transjugular intrahepatic portosystemic shunts.

Background: We have recently shown that the transjugular intrahepatic portosystemic shunt (TIPS) is more effective than paracentesis in the treatment of cirrhotic patients with severe ascites and can prolong survival in selected patients. Although an improved quality of life (QOL) has been suggested in these patients after the TIPS procedure, so far there are no data available to substantiate this assumption. Therefore, the aim of this study was to determine the effect of TIPS on the QOL in cirrhotic patients with refractory or recidivant ascites.