View clinical trials related to Constriction, Pathologic.
Filter by:Spinal stenosis is a common orthopedic spine condition that limits individuals ability to walk and stand because of nerve compression. Surgical treatment can alleviate leg pain and improve function such as increasing physical activity. This study will use Fitbit technology to monitor patient's post-operative physical activity. It will evaluate the efficacy of a Fitbit incentive based walking program on improving post-operative physical activity and rehabilitation.
Aortic stenosis (AE) is a disease that has been increasing steadily in recent years in most countries, including Spain.Risk factors for the development of AE include age, hypercholesterolemia, diabetes mellitus and arterial hypertension, the classic risk factors for the development of atherosclerosis. However, lipid-lowering therapy with statins and ezetimibe has not been shown to reduce the risk of long-term progression of AE by unknown mechanisms. All this suggests that subjects with HFhe have a high risk of developing AD, which has not been shown by the high coronary mortality in this population that precedes aortic calcification
Endoscopic insertion of plastic or metal stents in bile duct under endoscopic retrograde cholangiopancreatography is a well established treatment of distal malignant biliary obstruction.Biliary stents are widely used to relieve symptoms of malignant biliary stricture.Now, the mainly used biliary stents include plastic and metal stents. The main limitation of long time plastic stents is stents occlusion. Biliary plastic stents are changed every 2 to 3 months due to an expected median patency from 77 to 126 days.Metal stents present a lower risk of recurring biliary occlusion, yet high cost and stents occlusion are eventually inevitable. The mechanism of biliary stents occlusion include biliary sluge of the accumulation of bacteria and duodenal biliary reflux .The anti-reflux barrier of Oddi's sphincter disappears after the insertion of biliary stents and the presure in bile duct lowers the duodenals, which cause the retrograde flow of duodenal material into the biliary ducts. Besides, ordinary biliary plastic stent is short which can also shortens the length of duodenal biliary reflux . Therefore, trying to prevent the duodenal biliary reflux is very important in reducing biliary stents occlusion and it is gradually concerned by clinical researchers. Some studies have showed that plastic stents with antireflux valves can effectively reduce the biliary stent stricture and prolong the stents patency, which means reducing duodenobiliary reflux is surely useful for keeping biliary stent patency.So,we assume to explore an innovatively suspended overlength biliary stents (made from nasobiliary tube with length of 26cm or 30cm) as substitution for ordinary biliary plastic stent to prevent the duodenobiliary reflux by extending the length of duodenal content reflux and avoid the stents shift via suspending in intrahepatic duct. In this study,we will design a randomized controlled trial to compare the patency of different length of suspended overlength biliary stents and ordinary plastic biliary stents in patients with distal malignant biliary obstruction to evaluate the effect and safety of suspended overlength biliary stents for the prevention of duodenobiliary reflux and the effect of different length of the stents.
Differentiation between malignant and benign biliary strictures can be challenging. Accurate differentiation of malignant biliary strictures from benign ones is crucial to guide management decisions. While conventional tissue acquisition techniques such as brush cytology or intraductal biopsy of the biliary stricture is often performed during ERCP for tissue diagnosis, their sensitivities are suboptimal. The average sensitivities for brush cytology and intraductal biopsy were reported to be ~ 59% and ~ 63% respectively. When the cause of a biliary stricture remains unclear despite conventional ERCP techniques for diagnosis, cholangioscopy is often performed during ERCP to clarify the diagnosis. This allows an endoscopist to obtain a visual impression (VI) and to perform targeted biopsy under direct visualization of the biliary stricture. Recently, a digital SOC system (SpyGlass Digital System (SpyGlass DS), Boston Scientific, USA) has become available and has the potential to further improve the diagnosis of malignant and benign biliary strictures. The utility of this digital SOC in the evaluation of biliary strictures has not been well studied. We propose this study to evaluate the utility of the digital SOC during ERCP in the diagnosis of malignant and benign biliary strictures.
This translational study was designed to explore the association of the quantity and quality of epicardial adipose tissue (EAT) with coronary artery disease (CAD), left atrial remodeling and postoperative atrial fibrillation in a high cardiovascular disease-risk population. The investigators expect to identify new biochemical factors and biomarkers in the crosstalk between the epicardial adipocytes, coronary plaques and atrial cardiomyocytes that are involved in the pathogenesis of atherosclerosis and atrial fibrillation, respectively.
This study is aimed to investigate the global transcriptome in order to determine the expression profile of messenger RNAs (mRNAs), as well as long noncoding- (lncRNAs) and micro noncoding-RNAs (miRNAs) in heart failure (HF) and in aortic stenosis (AS). The aim is to clarify their role in cardiac disease pathogenesis, as well as their potential as biomarkers. To this purpose, both tissue and blood specimens will be collected and patients will be compared to individuals not affected by cardiovascular diseases.
This study will use PBV technique to quantitatively assess the improvement of renal perfusion before and after endovascular treatment (EVT) of renal artery stenosis.
Prospective, randomized comparison of the incremental dilation and stent exchange vs. sequential stent addition approaches for management of anastomotic biliary strictures will facilitate optimal management of patients who develop anastomotic biliary strictures after liver transplantation.
Two thirds of patients with Crohn's disease require intestinal surgery at some time in their life. Intestinal strictures, that is narrowing of the bowel due to inflammation and scarring, are the most common reason for surgery. Despite the high frequency, associated disability, and cost there are no are no treatment strategies that aim to improve the outcome of this disease complication. The STRIDENT (stricture definition and treatment) studies aim to develop such strategies.
To evaluate the clinical benefits and risks of hybrid operating techniques in management of intracranial aneurysms with coexistence of atherosclerotic intracranial arterial stenosis.