BACKGROUND AND OBJECTIVES Concentrated heparin solutions are instilled into the catheter lumens after each hemodialysis session to prevent catheter thrombosis. The heparin lock concentration at many centers has been decreased recently to reduce the risk of systemic bleeding and contain costs. However, the effect of this change on catheter patency is unknown. We compared catheter patency between...

OBJECTIVE Left internal thoracic artery (LITA) grafting has become the gold standard in coronary artery bypass graft procedure (CABG). In order to optimize the use of LITA or other grats, sequential anastomosis has been used. There is no consensus on equivalence of results between isolated and sequential grafts. The aim of this study is to compare the patency of isolated versus sequential graft...

Graft patency and completeness of revascularization are major determinants of long-term outcome following coronary artery bypass graft (CABG) procedures (1,2). Even though the results of percutaneous coronary intervention are routinely assessed with on-table X-ray angiography, the patency of grafts is not routinely determined during either on-pump (ON-CABG) or off-pump (OP-CABG) revascularizati...

This review examines why there is no normal range of nasal patency available to the surgeon when assessing nasal obstruction, and discusses the factors that influence nasal patency. Current normal ranges are examined and criticised because of the variability of normal values and the poor sampling methods used. Instability of physiological nasal patency is related to factors such as the nasal cy...

OBJECTIVE This study was conducted to evaluate stent compression in iliac vein compression syndrome (IVCS) and to identify its association with stent patency. MATERIALS AND METHODS Between May 2005 and June 2014, after stent placement for the treatment of IVCS with acute ilio-femoral deep vein thrombosis, follow-up CT venography was performed in 48 patients (35 women, 13 men; age range 23-87 ...

OBJECTIVE To assess the value of hysterosalpingography (HSG) in diagnosing tubal patency and peritubal adhesions using laparoscopy with chromopertubation as the gold standard. DESIGN Meta-analysis of 20 studies comparing HSG and laparoscopy for tubal patency and peritubal adhesions. PATIENTS Four thousand one hundred seventy-nine patients with infertility in 20 studies. INTERVENTION Hyste...

Vascular access stenosis is a major complication in hemodialysis patients. We prospectively observed 50 patients in whom 50 nitinol shape-memory alloy-recoverable technology (SMART) stents were used as salvage therapy for recurrent peripheral venous stenosis. Twenty-five stents each were deployed in native arteriovenous fistula (AVF) and synthetic arteriovenous polyurethane graft (AVG) cases. V...

Dacryocystography is a specific method of radiological examination the nasolacrimal apparatus based on use positive contrast agent, which allows assessment morphology and patency. Pathological conditions in rabbits are very common clinical practice, disturbance this apparatus? patency usually consequence dental diseases or respiratory infections. The aim article to present most pathological tha...

OBJECTIVES Brachiobasilic arteriovenous fistulas (BBAVF) can be performed in one or two stages. We compared primary failure rates, as well as primary and secondary patency rates of one- and two-stage BBAVF at two institutions. METHODS Patients undergoing one- and two-stage BBAVF at two institutions were compared retrospectively with respect to age, sex, body mass index, use of preoperative ve...

BACKGROUND Stenting has been shown to improve patency after femoral artery revascularization compared with balloon angioplasty. Limited data are available evaluating endovascular treatment for obstructive lesions of the popliteal artery. METHODS AND RESULTS This prospective, randomized, multicenter trial compared primary nitinol stent placement to percutaneous transluminal balloon angioplasty...