Twenty-three coronary bypass graft patients were evaluated by a contrast-enhanced computed tomography (CT) technique to determine graft patency. Four to six 4.8-second sequenced scans with a 1second interscan interval were obtained in each patient during the hand injection of 25-30 ml of contrast medium in a peripheral vein. Patency of grafts was determined by a characteristic contrast enhancem...

patients with end stage renal disease need a good vascular access for hemodialysis. arteriovenous fistula is the method of choice for vascular access in these patients. however, failure of arteriovenous fistula due to thrombosis is a major problem. the aim of this study was to evaluate the effect of the heparin on the patency of the arteriovenous fistula. this prospective interventional case co...

I read the paper by Hernández Garces et al. [1] with interest and I have some questions. I have prospectively examined patency of the accessory pancreatic duct (APD) by dyeinjection endoscopic retrograde pancreatography in 410 cases (291 controls, 46 acute pancreatitis, 32 chronic pancreatitis, 27 pancreaticobiliary maljunction, and 14 intraductal papillary mucinous tumor of the pancreas) [2, 3...

BACKGROUND Although ultrasonography before a vascular access (VA) operation has become popular in recent years, benchmarks for the diameter or blood flow of arteries or veins are not defined in Japan. The objective of the present study is to analyze the relationship between preoperative US findings and the patency rate of VA in Japanese hemodialysis patients. METHODS 139 patients with end sta...

BACKGROUND AND AIMS The patency capsule is designed to evaluate the patency of the small bowel before administration of small-bowel capsule endoscopy (SBCE) in patients at high risk of retention. The utilization of a patency capsule may be associated with a risk of symptomatic retention, but very few cases have been reported to date. The aim of our study was to describe our experience with this...

This study aims to report the outcomes of nitinol and polytetrafluoroethylene covered stent placement to treat hemodialysis arteriovenous access stenosis at a single center over a five-year period. Clinical and radiological information was reviewed retrospectively. Poststent primary and secondary patency rates were determined using Kaplan-Meier analysis. Ten clinical variables were subjected to...

BACKGROUND Arteriovenous dialysis access may be lost due to stenosis and thrombosis. Patency may be restored by thrombectomy or thrombolysis, but this is often not undertaken when the presentation is delayed. The success rate of delayed intervention is largely unknown. METHODS In this single-centre study, we identified all instances of arteriovenous vascular access (VA) failure treated with a...

BACKGROUND The patency of arteriovenous access is important for stable and effective hemodialysis, and long-term technical survival is best achieved with a native arteriovenous fistula (AVF). However, maintaining AVF patency remains a challenge. This study was designed to determine the independent prognostic factors for AVF patency according to hemodialysis duration. METHODS The primary study...

Objectives To assess the incidence of testicular appendices (Tas), epididymal anomalies (EAs), and processus vaginalis (PV) patency in patients with undescended testis (UT) according to testicular position and to compare them with human fetuses. Methods We studied 85 patients (108 testes) with cryptorchidism and compared the features with those of 15 fetuses (30 testes) with scrotal testes. W...