Cicatricial tracheal stenoses are mainly related to iatrogenic injury as postintubation, posttracheotomy or postoperative. Advances in airway prosthetics have provided a variety of silicone stents and expandable metal stents as a therapeutic option for tracheal stenoses. Nowadays, dynamic tracheal stents are performed prevalently for the treatment of tracheal stenosis. Four major problems are c...

Advanced squamous cell carcinoma of the oesophagus and gastroesophageal junction usually requires palliative treatment, and the method of choice is stenting. There are several types of stents currently available, including: self-expandable metallic stents (fully or partially covered); self-expandable plastic stents; biodegradable stents. Each of the mentioned stents has its advantages and limit...

Health technology The use of two methods for endoscopic placement of biliary stents in patients with pancreatic carcinoma. The methods examined were plastic (polyethylene) stents and metallic stents. Plastic stents were widely used due to their ease of insertion and low costs. However, their major disadvantage was their tendency to clog because of bacterial biofilm formation and biliary sludge....

Biliary stenting via endoscopic retrograde cholangiopancreatography has greatly improved the quality of patient care over the last 30 years. Plastic stent occlusion limits the life span of such stents. Attempts to improve plastic stent patency duration have mostly failed. Metal stents (self-expandable metal stents [SEMSs]) have therefore replaced plastic stents, especially for malignant biliary...

Endothelial progenitor cell (EPC)-seeded intravascular stents may reduce or prevent in-stent restenosis. A20 can play an important role for preventing vascular restenosis. Therefore, it is very important how to enhance the seeding efficiency of A20-modified EPCs on the stent for preventing in-stent restenosis. To approach this problem, we developed a novel transgenic EPC-seeded stent and evalua...

INTRODUCTION AND OBJECTIVES Drug-eluting stents are useful for preventing restenosis, but the patho-physiological processes involved in the proliferative response after implantation are still not known in detail. The aim of this study is to compare the coronary vascular histomorphometry after implanting drug-eluting stents and bare metal stents in a swine model. METHODS Sixty stents were rand...

Objective—To determine whether coil stents are as eVective as tubular stents in improving coronary flow velocity reserve (CFVR) after stent deployment. Methods—Distal CFVR was measured with a 0.014 inch Doppler guide wire before and after stenting in 33 patients. A coil stent was implanted in 16 patients and a tubular stent was used in 17 patients. Coronary flow velocity within the stent was al...

BACKGROUND AND PURPOSE CT angiography (CTA) and MR angiography (MRA) are increasingly used methods for evaluation of stented vessel segments. Our aim was to compare CTA, contrast-enhanced MRA (CE-MRA) at 1.5T, and CE-MRA at 3T for the visualization of carotid artery stents and to define the best noninvasive imaging technique as an alternative to conventional angiography for each stent. MATERI...

BACKGROUND AND PURPOSE Stent-assisted coiling has expanded the treatment of intracranial aneurysms, but the rates of procedure-related neurological complications and the incidence of angiographic aneurysm recurrence of this novel treatment are not yet well known. We present our experience with stent-assisted coiling with special emphasis on procedure-related neurological complications and incid...

Bioresorbable Stents In article 2201955, Cheng Sun, Guillermo A. Ameer, and co-workers report a method to confer X-ray contrast 3D printed polymeric bioresorbable stents (BRS) through the incorporation of clinically used agent iodixanol into citrate-based polymer ink. The 3D-printed BRS has strong visibility, mechanical competence, excellent in vitro biocompatibility, characteristics that are i...