Active clinical trials for "Constriction, Pathologic"

self-expandable metal stents for palliation of malignant biliary strictures

The purpose of the study is to evaluate the safety and effectiveness of the PTX-coating on the Formula PTX Balloon-Expandable Stent in treatment of renal artery stenosis.

The overall objective of this research study is to determine the effect of a pre-operatively placed nasogastric tube compared to no nasogastric tube, on post-operative emesis rates and postoperative length of stay in infants with a primary diagnosis of pyloric stenosis treated with pyloromyotomy. This study will also examine the feasibility data of the pilot data to develop estimates of treatment effect of a pre-operative nasogastric tube on post-operative rate of emesis and length of stay to be used to determine the sample size of the definitive trial.

The purpose of the study is to evaluate the safety and effectiveness of the Formula Balloon-Expandable Stent in treatment of renal artery stenosis.

The ORION study is being conducted to determine whether the Epic™ Nitinol Stent for primary stenting of iliac atherosclerotic lesions shows acceptable performance at 9 months.

The purpose of this study is to study the effect of Ivabradine vs Atenolol on heart rate and effort tolerance in patients with mild to moderate mitral stenosis and normal sinus rhythm.

One hundred patients with moderate to severe asymptomatic aortic stenosis (AS) will be asked to exercise on a treadmill. NT-pro-BNP levels will be drawn before and after exercise. Changes in NT-pro-BNP levels will be correlated to outcomes at one year. In the pilot phase an additional 10 control subjects without AS will be enrolled to document the control response of NT-pro-BNP elevations with exercise.

Back pain is a huge problem for millions of Americans, including nearly 11 million Veterans. Our older Veterans suffer the most. Citizens spend billions of dollars, yet consistently get poor results. Primary Care Providers are often tasked with diagnosing and treating Chronic Low Back Pain, even though they are often undereducated in the field. These PCPs often use advanced imaging, usually MRIs to guide care. These images often show degenerative disc disease and other common pathologies in older adults, even those who are pain free, which can lead to misdiagnosis and treatment. The investigators believe that Chronic Low Back Pain is a syndrome, a final common pathway for the expression of multiple contributors that often lie outside the spine itself. For example, hip osteoarthritis, knee pain, and even anxiety could all lessen back pain if addressed and treated probably. Investigators will measure participants' low back pain-associated disability with the well-validated RMDQ. Data will be collected at baseline and monthly via telephone. The investigators hypothesize that veterans who receive PCCET will experience significantly greater reduction in low back pain-associated disability than those who receive IAUC at six months. Investigators will also measure participants' low back pain with the 0-10 Numeric Rating Scale for Pain. Data will be collected at baseline and monthly via telephone. The investigators hypothesize that veterans who receive PCCET will experience significantly greater reduction in low back pain than those who receive IAUC at six months. The goal of this study is to compare patients treated with usual care, which usually starts with imaging, versus patients who are treated by trained geriatricians who know how to recognize and address 11 key conditions that commonly drive pain and disability in older adults. The investigators believe that older patients who receive care tailored to their needs by educated PCPs will ultimately have less back pain and, more importantly, better quality of life.

The purpose of this study is to establish clinical proof of concept of temporary indwell of the WallFlex™ Esophageal Fully Covered Metal Stent (FCMS) for the treatment of refractory benign esophageal strictures caused by caustic ingestion.

The purpose of this of this study is to compare the safety and effectiveness of temporary indwell of the WallFlex Esophageal FC Metal Stent to Bougie Dilation for the treatment of refractory anastomotic esophageal strictures