Publications by authors named "Kai E Wilhelm"
Purpose: To determine value of transarterial radioembolization (TARE) for palliative treatment of unresectable liver-dominant breast metastases (LdBM) and to determine prognostic parameters.
Materials And Methods: Records of patients undergoing TARE for progressing LdBM between June 2006 and March 2015 were retrospectively reviewed; 44 female patients (mean age 56.1 y; range, 34.
Background: Radiofrequency ablation (RFA) temperatures reaching 45°C in adjacent tissues are cytotoxic to the spinal cord, nerves and surrounding tissues.
Objective: This study compares different RFA electrodes with regard to the temperature distribution during ablation of spinal metastases.
Methods: In vitro experimental study in isolated lumbar vertebrae of a human cadaveric spine.
Incidence and risk factors of early arterial blood flow stasis during first radioembolization of primary and secondary liver malignancy using resin microspheres: an initial single-center analysis.
Eur Radiol
August 2016
Objectives: To retrospectively determine incidence of early arterial blood flow stasis and its influencing factors during resin-based radioembolization (RE) of liver tumours.
Methods: Data of patients undergoing resin-based RE from 06/2006-12/2013 were reviewed. Second RE procedures of the same liver lobe were excluded.
Background: This study aimed to evaluate the embolic properties, time to reperfusion, and histologic changes in temporary embolization of liver tissue with degradable starch microspheres (DSM) in a swine model.
Methods: In four adult minipigs, DSMs were injected into the right or left hepatic artery on the lobar level until complete stasis of the blood flow was detectable angiographically. The time required to complete angiographically determined reperfusion was noted.
Purpose: To describe the feasibility of vascular access closure in arteries other than the common femoral artery (CFA) using the ExoSeal vascular closure device (VCD).
Materials And Methods: Between December 2011 and August 2013, 8 patients (4 males, 4 females, mean age 64 years [range 42-81]) underwent 13 extrafemoral access site closure using the ExoSeal VCD (brachial artery n = 7, venous femoropopliteal bypass n = 3, femoropopliteal segment n = 2, proximal superficial femoral artery n = 1). Patient history, procedural characteristics, and complications were recorded.
A ductus arteriosus aneurysm (DAA) is a rare but potentially fatal condition in adults. In the past, open surgery was the only available option for treatment. Nowadays, endovascular repair has emerged as a safe and less invasive treatment option for aortic aneurysms.
View Article and Find Full Text PDFPurpose: To describe a new approach to protect nontarget healthy liver tissue using degradable starch microspheres (DSM) as a short-term embolizate during radioembolization of liver tumours with (90)Y microspheres.
Methods: Between December 2011 and July 2012 radioembolization was performed in 54 patients. Five of these patients (three women, two men; mean age 67 years) underwent protective temporary embolization using DSM (EmboCept® S) of normal liver tissue that could not be excluded from the area treated by radioembolization through catheter repositioning.
Purpose: This study was designed to evaluate the results of a novel technique for transrenal ureteral occlusion using an Amplatzer vascular plug (AVP) II in patients with urinary fistulas.
Methods: We retrospectively evaluated the results of transrenal occlusion of 15 ureters in 9 hospitalized patients [8 females, 1 male, mean age 64 (range 52-79) years] suffering from pelvic malignancy (4 cervix-carcinomas, 3 bladder-carcinomas, 1 colorectal carcinoma, and 1 vulva-carcinoma). Seven patients were treated for urinary fistulas (4 ureteroenteral, 3 vesicovaginal); the others showed ileum-conduit-insufficiency and Mainz-pouch incontinence, respectively.
Purpose: This study was designed to evaluate retrospectively the results of complex iliac artery aneurysm (IAA) exclusion using the Cardiatis-Multilayer-Stent.
Methods: Between October 2010 and August 2012, ten IAAs were treated in eight males (mean age 75 (59-91) years) using the Multilayer Stent. All IAA exceeded a diameter of 3 cm or were symptomatic.
Purpose: To evaluate safety of coblation of simulated lytic metastases in human cadaveric vertebral bodies by measuring heat distribution during thermal tissue ablation and comparing it to radiofrequency ablation (RFA).
Materials And Methods: Three devices were compared: a 10 mm single-needle RFA electrode, a 20 mm array RFA electrode and the coblation device. To simulate bone metastases, a spinal tumor model was used stuffing a created lytic cavity with muscle tissue.
Combined abdominal aortic aneurysm (AAA) and iliac artery aneurysm (IAA) is a common condition. The recently approved Cardiatis Multilayer stent (Cardiatis, Isnes, Belgium) is an innovative stent system for peripheral aneurysm management that has been applied in several clinical cases. After deployment, the unique stent design reduces mean velocity and vorticity within the aneurysm sac, causing thrombus formation and thus exclusion of the aneurysm while the vessels branching from the aneurysm remain patent.
View Article and Find Full Text PDFPurpose: To evaluate the usefulness and safety of cone-beam computed tomography (CBCT) dacryocystography in detecting lesions, identifying coexisting soft-tissue changes and determining treatment options in patients with epiphora.
Patients And Methods: Unilateral digital subtraction dacryocystography and CBCT dacryocystography were carried out on 45 patients. Stenoses and occlusions were identified and coexisting changes such as septal deviation and dacryoliths were noted.