Active clinical trials for "Dilatation, Pathologic"

Otitis media with effusion (OME) is very common in children and characterized by fluid in the middle ear without signs or symptoms of acute ear infection. Treatment options are tympanostomy tubes and/or adenoidectomy. However OME often reoccurs after these procedures. Goal of this study will be to evaluate the Balloon Eustachian Tuboplasty (BET) in children as an additional treatment option and to assess long-term effects of BET. Beside the standard procedure, children (4 to 10 years of age), with equal pathology on both ears, will be assigned for BET on side.

Treatment of patients with in-stent restenosis (ISR) remains a challenge. This study will assess the efficacy of Bioresorbable Vascular Scaffolds (BVS) (Abbott Vascular) in the treatment of patients suffering from ISR after scoring balloon pre-dilatation.

Limited endoscopic sphincterotomy with balloon dilation（ESBD）is a promising technique in treating common bile duct stones. It had the similar success rate of stone extraction, but its incidence of complications remained uncertain. However, there is no clinical evidence and guideline to define the optimal duration of balloon dilation so far. So we designed a prospective randomized trial to compare the effect of three different duration of balloon dilation during ESBD so that we can find the optimal duration of the balloon dilation.

The primary objective of this study is to determine the effectiveness and safety of corneal collagen cross-linking at irradiance levels of 9 and 18 mW/cm2.

To evaluate the efficacy of ultraviolet-A (UVA)-induced cross-linking of corneal collagen (CXL) as a method to increase the biomechanical and biochemical stability of the cornea by inducing additional cross-links within or between collagen fibers using UVA light and the photo- mediator riboflavin. The purpose of this study is to generate data for presentation at medical meetings and for peer-review publication

The major clinical problems in patients with Marfan Syndrome (MFS) are aortic root dilation (ARD), dissection and rupture. Although the available treatments (beta-blockers, BBs) improve the evolution of the disease, they do not protect MFS patients from progression of ARD and dissection. A key molecule that negatively influences cell growth, differentiation, survival and death in MFS is TGFb which is antagonised by existing drugs employed in the clinical practice, the Angiotensin II receptor blockers (ARB).

The purpose of this study is to compare pneumatic dilatation and laparoscopic Heller myotomy in patients with achalasia in order to learn which of these two treatments should be recommended to patients in the future.

The investigators aim to enroll 2000 patients to undergo diagnostic hysteroscopy for suspected uterine pathologies. Women will be randomized into two groups on the basis of distension medium : group A CO2; group B physiological solution. Pain discomfort will be evaluated after the examination.

Subjects with abnormal uterine bleeding and scheduled for dilatation and curettage (D&C) will be randomized to a multimedia-based education (MME group) or verbal information (Control group ) before (D&C). State-Trait Anxiety Inventory will be asked by the nursing staff before and after multimedia-based education or verbal information to all patients. Then the patients will undergo (D&C) at an office setting. The impact of MME on patient anxiety will be evaluated by statistical analysis.

Comparison with use of Intravascular Ultrasound (IVUS) analysis of two methods of percutaneous coronary interventions (PCI) with drug eluting stent: After successful drug eluting stent implantation, patients were randomized into two groups: Group A had no further dilatation, and Group B had additional post-dilatation with a noncompliant balloon. The investigators performed IVUS analysis in groups A and B just before randomization and after post-dilatation in group B.