View clinical trials related to Polyps.
Filter by:Summary 1. Purpose and Objective: The purpose of this study is to test the feasibility of rapid acquisition of point of care 3D ultrasound in obtaining abdominal and/or pelvic images. The study will use a newly developed acquisition method and post-processing technique to create three dimensional image models of the abdomen and/or pelvis. 2. Study activities and population group. The study population will be a convenience sample of patients of any age presenting to the Emergency Department with complaints necessitating a clinical abdominal and/or pelvic imaging. The study intervention includes acquisition of research ultrasound images, which will not be used for clinical care, and comparison of these images with clinically obtained images. Other clinical data such as surgical and pathology reports will also be reviewed. 3.Data analysis and risk/safety issues. This is a pilot study intended to determine feasibility and to refine image reconstruction algorithms. Research images will be compared to clinical images. Comparison of research images with final diagnosis will also occur. The research intervention, an ultrasound exam, has no known safety risks. The only risk to subjects is loss of confidentiality. This study is observational, not interventional, because the experimental ultrasound will be performed in all subjects and will not be used in the clinical care of patients (consequently, will not have the opportunity to affect clinical outcomes). Experimental images will be reviewed after completion of clinical care and will not be provided to the clinicians caring for the subjects. The investigators are not measuring the effect of the ultrasound examination on the subjects' outcomes.
This study is a randomized controlled trial to determine whether i-scan can improve the detection of conventional adenomas and sessile serrated adenomas/polyps.
A prospective outcomes study in patients referred for endoscopic mucosal resection of complex colon polyps.
This prospective cohort study is designed to investigate and to compare the diagnostic performance of contrast-enhanced ultrasonography (CEUS) and multidetector computed tomography (CT) for gallbladder cholesterol polyps, adenoma and gallbladder cancer.
Adenomas and hyperplastic polyps are polypoid lesions that can occur in any part of the colon. Currently all polyps should be resected endoscopically, however adenomas have the potential to develop into colorectal cancer whereas hyperplastic polyps do not. This approach enables the lesions to be evaluated under the microscope. Currently only the pathological diagnosis can distinguish exactly between adenomas and hyperplastic polyps. Acetic acid (AA) chromoendoscopy is already widely used in order to improve optical determination of mucosal lesions in the upper gastrointestinal tract. In the colon only few studies investigated the impact of AA in differentiating normal mucosa from suspicious mucosa. The aim of the present study is to evaluate the value of spraying acetic acid as an adjunct for optical characterization of colon polyps. Using AA may be beneficial for determining optical diagnoses of colon polyps during real time colonoscopy. This is a single-arm proof of principle study. If colon polyps are found during colonoscopy a 1.5 percent AA solution will be used for chromoendoscopy. Endoscopists are encouraged to use the Narrow Band Imaging (NBI) function of the endoscope prior to the use of AA. After AA is sprayed endoscopists will diagnose the polyp optically. Endoscopists have to predict adenomatous or non-adenomatous histology based upon optical features of the polyp. All polyps will be resected endoscopically so that histopathological diagnoses can be determined. After completing the trial the investigators aim to compare optical and histopathological-based diagnoses of polyps. Histopathological diagnoses will serve as the gold standard. Based upon this information the accuracy of the optical diagnoses will be calculated. The investigators hypothesis is, that optical-based diagnosis using NBI and AA will be accurate in > 75% of all polyp cases.
The device is intended to endoscopically transect polyps in the gastrointestinal tract (sessile or pedunculated) using electrocautery. During the same maneuver the polyp is captured, retrieved and submitted for pathological analysis. The Tandem Snare is an intervention tool inserted through the colonoscope for the resection and removal of polyps sized 6 to 25 mm. The Tandem snare utilizes a technology that has the potential to hold the polyp, lift it up, resect and remove it without losing it. This is a feasibility study aiming to demonstrate the safety of the Tandem Snare used for 6-25mm polyps' polypectomy in screening, diagnostic or surveillance colonoscopy.
While oral steroids have been shown to be effective in the management of patients with chronic rhinosinusitis with polyps, its role in treating chronic rhinosinusitis without polyps (CRSsNP) is ambiguous. Despite a lack of strong clinical evidence to suggest a benefit in this disease state, steroids are often prescribed as a component of post-operative care after sinus surgery for patients without polyps. Oral steroids carry with them significant adverse effects, and should be prescribed thoughtfully. The aims of this study are to determine if oral steroids in the peri-operative period improves patient outcomes in CRS without polyps.
The purpose of this study is to evaluate safety, tolerability, pharmacokinetics, and pharmacodynamics of PF-06817024 in healthy volunteers, in participants with chronic rhinosinusitis, with nasal polyps and in participants with moderate-to-severe Atopic Dermatitis
Background:The optimal technique for removal of diminutive or small colorectal polyps is debatable. Objective:To compare the complete resection rates of cold snare polypectomy (CSP) and hot snare polypectomy (HSP) for the removal of adenomatous polyps(3-9mm). Design：Prospective randomized controlled study. Setting：Three tertiary referral hospitals. Patients：we will recruit a total of 330 polyps(3-9mm). Interventions:Enrolled patients were randomly assigned to one of the two polypectomy protocols (CSP vs. HSP) using a computer-generated random sequence. If a patient had one or more polyps, all eligible polyps were removed using the initially assigned polypectomy protocol. After the initial polypectomy, additional EMR was performed at the polypectomy site to assess the presence of residual polyp tissue. Main Outcome Measurements:The primary study outcome was to compare the complete polyp resection rate between groups. Secondary outcomes included rate of postpolypectomy adverse events, including bleeding, perforations,infection and rate of tissue retrieval(Complete resection was defined as the absence of residual polyp tissue in the EMR sections of the polypectomy site).
Diminutive polyps, measuring between 1 and 5 mm, represent the vast majority of colorectal polyps encountered during colonoscopy. Since the chance of harboring advanced adenoma or carcinoma in this kind of polyps is very low, a "remove and discard" technique has been proposed. The differentiation between adenoma/non adenoma polyps is based on the use of endoscopes equipped with high definition, magnification and optical filters.