Transrenal Hemodialysis Catheter Insertion and Replacement in Patients with Upper Extremity Central Venous Access Exhaustion.

Purpose: Patients undergoing long-term hemodialysis may suffer upper extremity central venous access failure and require an alternative route. This study aimed to evaluate the safety and efficacy of transrenal hemodialysis catheter insertion/replacement in patients with upper extremity central venous access failure.

Materials And Methods: A multicenter retrospective cohort study was made of transrenal hemodialysis catheter insertion/replacement performed between 2014 and 2020.

Diagnosis and Treatment of Lower Extremity Deep Vein Thrombosis: Korean Practice Guidelines.

Lower extremity deep vein thrombosis is a serious medical condition that can result in death or major disability due to pulmonary embolism or post-thrombotic syndrome. Appropriate diagnosis and treatment are required to improve symptoms and salvage the affected limb. Early thrombus clearance rapidly resolves symptoms related to venous obstruction, restores valve function and reduces the incidence of post-thrombotic syndrome.

Korean Guidelines for Interventional Recanalization of Lower Extremity Arteries.

Peripheral arterial occlusive disease caused by atherosclerosis can present with intermittent claudication or critical limb ischemia. Proper diagnosis and management is warranted to improve symptoms and salvage limbs. With the introduction of new techniques and dedicated materials, endovascular recanalization is widely performed for the treatment of peripheral arterial occlusive disease because it is less invasive than surgery.

Interleukin-8 level as a prognostic marker in patients with hepatitis B virus-associated hepatocellular carcinoma treated with transarterial chemoembolization.

We investigated the association between serum interleukin (IL)-8 levels and post-transarterial chemoembolization (TACE) outcomes in patients with hepatitis B virus (HBV)-associated HCC. We enrolled 119 TACE-treated patients with HBV-associated HCC; TACE refractoriness and liver transplantation (LT)-free survival were evaluated during follow-up. Pre-TACE serum levels of various cytokines (epidermal growth factor [EGF], fibroblast growth factor 2, granulocyte-colony stimulating factor [G-CSF], interferon-γ, IL-8, IL-12, IL-17A, interferon-γ-inducible protein-10, monocyte chemotactic protein-1, tumor necrosis factor-α and vascular endothelial growth factor) were analyzed.

Value of MDCT in diagnosis and management of esophageal sharp or pointed foreign bodies according to level of esophagus.

Objective: The purpose of this study was to validate the usefulness of MDCT for diagnosis of a sharp or pointed esophageal foreign body according to esophageal level.

Materials And Methods: Forty-two patients with a history of sharp or pointed foreign body ingestion were reviewed retrospectively. Two observers interpreted the CT and the conventional radiography datasets separately.

New predictive marker for hemodialysis vascular access dysfunction.

To examine the relationship between intra-access pressures and vascular stenosis, we measured the total (pT ) and static (pS ) pressures and the severity of stenosis before and after percutaneous transluminal angioplasty (PTA). The dynamic pressure (△p) and static intra-access pressure ratios (SIAPR) were calculated. We analyzed the clinical correlation of △p and SIAPR with the severity and location of stenosis, and searched potential predictive factors for the severity of stenosis using multivariate regression.

Endovascular revascularization for patients with critical limb ischemia: impact on wound healing and long term clinical results in 189 limbs.

Objective: To evaluate the impact on wound healing and long-term clinical outcomes of endovascular revascularization in patients with critical limb ischemia (CLI).

Materials And Methods: This is a retrospective study on 189 limbs with CLI treated with endovascular revascularization between 2008 and 2010 and followed for a mean 21 months. Angiographic outcome was graded to technical success (TS), partial failure (PF) and complete technical failure.

Percutaneous biliary drainage using open cell stents for malignant biliary hilar obstruction.

Objective: To evaluate the feasibility, safety and the effectiveness of the complex assembly of open cell nitinol stents for biliary hilar malignancy.

Materials And Methods: During the 10 month period between January and October 2007, 26 consecutive patients with malignant biliary hilar obstruction underwent percutaneous insertion of open cell design nitinol stents. Four types of stent placement methods were used according to the patients' ductal anatomy of the hilum.

Placement of retrievable self-expandable metallic stents with barbs into patients with obstructive prostate cancer.

Objectives: To evaluate the technical feasibility and clinical effectiveness of retrievable self-expandable metallic stents with barbs in patients with obstructive prostate cancer.

Methods: Retrievable self-expandable metallic stents with eight barbs each were inserted into eight consecutive patients with obstructive prostate cancer. Patient ages ranged from 55 to 76 years (mean, 69 years).

Placement of a covered expandable metallic stent to treat nonanastomotic malignant jejunal obstructions after total gastrectomy with esophagojejunostomy.

Objective: The objective of our study was to assess the technical feasibility and clinical effectiveness of expandable metallic stent placement in patients with nonanastomotic malignant jejunal obstruction after total gastrectomy with esophagojejunostomy.

Materials And Methods: We retrospectively analyzed data from 21 patients with malignant jejunal obstruction after total gastrectomy with esophagojejunostomy who received one of two types of expandable metallic stent. Clinical effectiveness was assessed using the following variables: technical and clinical outcomes, complications, dysphagia scores before and after stent placement, patient survival, and stent patency.

Radiofrequency ablation of benign thyroid nodules and recurrent thyroid cancers: consensus statement and recommendations.

Thermal ablation using radiofrequency is a new, minimally invasive modality employed as an alternative to surgery in patients with benign thyroid nodules and recurrent thyroid cancers. The Task Force Committee of the Korean Society of Thyroid Radiology has developed recommendations for the optimal use of radiofrequency ablation for thyroid nodules. These recommendations are based on a comprehensive analysis of the current literature, the results of multicenter studies, and expert consensus.

A venotomy and manual propulsion technique to treat native arteriovenous fistulas occluded by thrombi.

Objective: The objective of our study was to evaluate the efficacy and safety of a venotomy and manual propulsion technique that is performed to treat failed native arteriovenous fistulas (AVFs) with chronic organized thrombi.

Materials And Methods: For this study, we retrospectively reviewed a total of 69 venotomy and manual propulsion procedures performed from October 2005 to July 2009 in 56 patients for the treatment of native AVFs occluded by chronic thrombi. Inflow, anastomotic, and outflow veins were occluded using balloon catheters.

Complications encountered in the treatment of benign thyroid nodules with US-guided radiofrequency ablation: a multicenter study.

Purpose: To evaluate clinical aspects and imaging features of complications encountered in the treatment of benign thyroid nodules with radiofrequency (RF) ablation.

Materials And Methods: Institutional review board approval was obtained for this retrospective study, and informed consent was waived. From June 2002 to September 2009, 1459 patients underwent RF ablation of 1543 thyroid nodules with an RF system with internally cooled electrodes at 13 thyroid centers, which were members of Korean Society of Thyroid Radiology.

Temporary placement of covered retrievable expandable nitinol stents with barbs in high-risk surgical patients with benign prostatic hyperplasia: work in progress.

Purpose: To report the use of a newly constructed, covered, retrievable, expandable nitinol stent with barbs to overcome the problem of stent migration associated with conventional covered prostatic expandable stents and to evaluate prospectively the technical feasibility and clinical effectiveness of the stents in patients with benign prostatic hyperplasia (BPH).

Materials And Methods: A covered retrievable expandable nitinol stent with four barbs was placed with use of an 18-F stent delivery system in seven consecutive patients with symptomatic BPH who had high operative risks. Age range of patients was 62-83 years (mean 74 years).

Chemical ablation of the gallbladder with acetic acid.

Purpose: Chemical ablation of the gallbladder may be a useful alternative to surgery for inoperable disease. The purpose of this study was to investigate the feasibility of chemical ablation of the gallbladder with acetic acid in a canine model.

Materials And Methods: Five beagle dogs underwent percutaneous transhepatic cholecystostomy.

Factors affecting the validity of ankle-brachial index in the diagnosis of peripheral arterial obstructive disease.

We evaluated 158 legs from 79 consecutive patients who had undergone both ankle-brachial index (ABI) measurements and angiography for claudication symptoms between January 2007 and December 2008. The diagnosis of peripheral arterial disease (PAD) in the individual legs was established by angiography. Ankle-brachial index was considered abnormal if it was <0.

Safety and effectiveness of analgesia with remifentanil for percutaneous transhepatic biliary drainage.

Objective: The purpose of this study was to evaluate the safety and effectiveness of analgesia with remifentanil for percutaneous transhepatic biliary drainage.

Subjects And Methods: Analgesia for percutaneous transhepatic biliary drainage was induced with remifentanil in 186 patients over a 1-year period. Remifentanil was administered IV with an infusion pump at 0.

Crisscross-configured dual stent placement for trisectoral drainage in patients with advanced biliary hilar malignancies.

Purpose: To evaluate technical success and clinical efficacy of crisscross-configured dual biliary stent implantation in patients with a biliary hilar tumor extending beyond the segmental ducts.

Materials And Methods: Between January 2002 and December 2006, two metallic stents were placed crossing each other in a hepatic hilum in 42 patients. One stent was placed between one right sectoral duct and the left hepatic duct and the other was placed between another right sectoral duct and the common bile duct.

Treatment of high-flow priapism with superselective transcatheter embolization in 27 patients: a multicenter study.

Purpose: To evaluate the effectiveness and safety of treatment of high-flow priapism (HFP) with superselective transcatheter embolization at nine university hospitals.

Materials And Methods: Between May 1994 and October 2006, 27 patients underwent superselective embolization of the cavernous artery for HFP. Trauma was apparent in 22 patients, there was self-administered intracavernosal injection for erectile dysfunction in two, and the remaining three did not recall any penile or perineal trauma.

Fluoroscopically guided balloon dilation of anastomotic strictures after total gastrectomy: long-term results.

Objective: The purpose of this study was to evaluate the radiologic and clinical effectiveness and long-term results of fluoroscopically guided balloon dilation of anastomotic strictures after total gastrectomy.

Conclusion: Fluoroscopically guided balloon dilation is effective and safe and has encouraging long-term results in the management of benign anastomotic strictures after total gastrectomy.

Intracortical lipoma of the femur.

Intracortical lipoma is an extremely rare benign primary bone tumor. We encountered a case of an intracortical lipoma found incidentally in the femur of a 31-year-old female. Magnetic resonance imaging and computed tomography of the femur demonstrated an intracortical fatty lesion in the posterolateral aspect of the diaphysis.

Malignant duodenal obstructions: palliative treatment using self-expandable nitinol stents.

Purpose: To assess the efficacy of fluoroscopic per oral placement of self-expandable nitinol stents in the palliative treatment of malignant duodenal obstructions.

Materials And Methods: Under fluoroscopic guidance, 82 patients (56 male and 26 female; mean age, 62.3 y) with malignant duodenal obstructions were treated with per oral placement of four types of self-expandable nitinol stents.

Fluoroscopically guided balloon dilation for patients with esophageal stricture after radiation treatment.

Purpose: To evaluate the safety and clinical effectiveness of fluoroscopically guided balloon dilation in patients with esophageal stricture after radiation therapy (RT).

Materials And Methods: From April 1993 through December 2004, fluoroscopically guided balloon dilation was performed in 15 patients with esophageal strictures secondary to previous RT. Technical success, clinical success, recurrence of dysphagia, primary and secondary patency rates, and complications related to the procedure were retrospectively evaluated.

Use of guiding sheaths in peroral fluoroscopic gastroduodenal stent placement.

Our purpose was to assess the safety and usefulness of guiding sheaths in peroral fluoroscopic gastroduodenal stent placement. Two types of guiding sheath were made from straight polytetrafluoroethylene tubes. Type A was 80 cm in length, 4 mm in outer diameter and 3 mm in inner diameter.

Gastric outlet obstruction caused by benign anastomotic stricture: treatment by fluoroscopically guided balloon dilation.

Purpose: To evaluate the clinical efficacy and safety of fluoroscopically guided balloon dilation of gastric outlet obstruction caused by benign anastomotic stricture.

Materials And Methods: Fluoroscopically guided balloon dilation was performed on 17 patients with gastric outlet obstruction caused by benign anastomotic stricture. Fourteen patients underwent surgery for malignant disease and three patients for complication of benign gastric ulcer.