View clinical trials related to Stenosis.
Filter by:Introduction: Degenerative changes of the discs and facet joints in the lumbar spine can result in pain and disability from spondylosis, spondylolisthesis and stenosis. Patients who are suffering with back and/or leg pain are potential candidates for an ALIF procedure. Purpose: To assess and compare clinical outcomes and fusion rates in patients undergoing an instrumented ALIF procedure. Comparisons in all variables will be made across diagnostic categories. Comparisons between type of interbody spacer, graft type, and type of instrumentation will also be made
The proposed study will investigate the efficacy of the peripheral cutting balloon (PBC) compared to the high pressure balloon in dilating venous stenosis in hemodialysis fistulas. 2. SPECIFIC AIMS Study endpoints will be: Primary Endpoint 1. Primary and assisted patency at 6 months Secondary Endpoints: 1. Procedure effectiveness/residual stenosis 2. Procedure-related complications 3. Primary patency and primary assisted patency 12 months 4. Secondary patency at 6 and 12 months 5. Number/type of secondary interventions.
The aim of the study is to investigate the feasibility of Paclitaxel-eluting PTCA-balloon dilation (SeQuent Please) followed by bare metal stent (Coroflex ) deployment in the main branch (reference diameter: ≥ 2.5 mm and ≤ 3.8 mm, reference diameter of side branch: ≥ 2.0 mm and ≤ 3.5 mm, length of stenoses in either branch ≤ 20 mm) in the treatment of significant (>70%) de-novo-bifurcation stenoses of any Medina classification type in the native left coronary artery as reflected by procedural success and to evaluate the preservation of vessel patency.
Arteriovenous grafts are used as the vascular access in 40-50% of hemodialysis patients. Grafts are prone to recurrent stenosis (narrowing) and thrombosis (clotting). Graft clotting is usually due to a narrowing at the site where the graft joins the vein. The standard treatment is to remove the clot and angioplasty the narrowed area. The long-term outcome is not good, lasting only about 1 month. Placing a stent (a small metallic, PTFE covered, spring) at the narrowed site may keep the graft open longer. Principal investigator's preliminary research data suggest that placing a stent at the stenotic site prolongs graft patency following thrombectomy, as compared to conventional angioplasty. This is a single-center, randomized clinical trial, in which patients with a clotted graft with underlying stenosis at the venous anastomosis of the graft will be allocated to thrombectomy + angioplasty (control group) or to thrombectomy + stent placement (study group). The primary endpoint will be primary (unassisted) graft patency. The secondary endpoints will be secondary (assisted) graft patency and overall access-related costs.
FGF-1 for the treatment of patients with peripheral arterial disease with intermittent claudication.
The study aims to assess whether a SIMPLE or a COMPLEX strategy is best for the treatment of coronary bifurcation stenoses.
The type of hemodialysis access and preservation of this access greatly influences the quality of life and survival of patients undergoing hemodialysis. The Kidney Disease Outcomes Quality Initiative (K/DOQI) guidelines for vascular access recommend the primary placement of native or autogenous hemodialysis fistulas in preference to polytetrafluoroethylene (PTFE) grafts and central venous catheters because the former form of access has fewer complications and a longer durability. However, autogenous hemodialysis fistulas, like polytetrafluoroethylene grafts, are also subject to dysfunction and eventual failure. Endovascular angioplasty has become an accepted alternative treatment to surgical revision for hemodialysis access-related venous stenoses and occlusions. However, the patency rates in the follow-up period are low because of the high frequency of restenosis due to intimal hyperplasia. Since 1988, noncovered stents have been used to improve fistula patency. In the central veins, bare stents demonstrate better patency rates than percutaneous transluminal angioplasty (PTA) alone. Neointimal hyperplasia is the major reason for restenosis following stent placement. The cephalic vein forms the outflow conduit for radiocephalic and brachiocephalic autogenous fistulas. It has recently been suggested that a focal area of the cephalic vein is prone to developing hemodynamically significant stenosis, in what is now termed the cephalic arch. This is the perpendicular portion of the cephalic vein in the region of the deltopectoral groove before its junction with the axillary vein. To overcome the problem of restenosis due to intimal hyperplasia in the cephalic arch the investigators used the insertion of a stent-graft as an alternative approach. In this study they investigated the use of a PTFE-covered nitinol stent-graft (Fluency, Bard) versus a Luminex (Bard) stent.
The purpose of this study is to look at the safety (what are the side effects) and efficacy (how well does it work) of Magnevist (the study drug) used for MRI of the calf and foot arteries. The results will be compared to the results of MRI taken without Magnevist, and with the results of your X-ray angiography.
The purpose of this study is to compare Optecure™ as an autograft extender (treatment) to autograft alone (control) in patients undergoing 1 or 2 level fusion of the lumbar spine(one level is defined as two adjacent vertebrae), L2 and below. The primary endpoint will be the assessment of fusion by evaluation of x-rays taken following surgery at each visit. The x-ray evaluation will be conducted by a radiologist who is blinded to the type of treatment each patient has received. Subjects will be seen at 6 weeks, 3 months, 6 months, 12 months, and 24 months postoperative (post-op). Questionnaires and x-rays will be completed at each visit and a computed tomography (CT) scan will be taken at the 12 month visit(and used to aid in assessment of bridging bone, where appropriate).
The purpose of the study is to prospectively measure pain, function, and patient satisfaction in 70 consecutive patients treated by lumbar fusion using the Triad allograft. Results of the Triad allograft will be compared to those of other anterior lumbar interbody fusion (ALIF), transforaminal lumbar interbody fusion (TLIF), and posterior lumbar interbody fusion (PLIF) surgeries. Patient participation is based on the physician determination that the patient requires one of these surgeries. Participants will be evaluated pre-operatively and post-operatively at 3, 6, 12,and 24 month intervals. Clinic procedures will be related to standard of care except for the completion of several study questionnaires: 1. Back Pain Questionnaire; 2. Oswestry Disability Index Questionnaire; 3. Short Form-36 (SF-36) Survey; 4. Visual Analog Pain Scale (VAS); and 5. The Modems Patient Satisfaction Survey. Outcome Measurements: 1. The patient's pain is scored by a VAS normalized to 100; 2. Patient function is based on Oswestry scores; 3. General health is assessed by SF-36 completion; and 4. Overall patient satisfaction will be determined by the completion of the Modems.