There are more than 498,563 clinical trials published worldwide with over 60,000 trials that are currently either recruiting or not yet recruiting. Use our filters on this page to find more information on current clinical trials or past clinical trials (free or paid) for study purposes and read about their results.
The purpose of the study is to evaluate the value of biomarkers in the diagnosis and risk stratification of patients with suspected pulmonary embolism.
Background: Some head and facial abnormalities are rare and present at birth. Others are more common, and may not show up until puberty. These conditions have different causes and characteristics. Researchers want to learn more about these conditions by comparing people with face, head, and neck abnormalities to family members and to healthy volunteers without such conditions. Objectives: To learn more about abnormal development of the face, head, and neck. To determine their genetic variants. Eligibility: People who have not had surgery for facial trauma: People ages 2 and older with craniofacial abnormalities (may participate offsite) Unaffected relatives ages 2 and older Healthy volunteers ages 6 and older Design: Participants will be screened with medical history and physical exam focusing on head, face, and neck Participants may be followed for several years. Visits may require staying near the clinic for a few days. A visit is required for the following developmental stages, along with follow-up visits: Age 2-6 Age 6-10 Age 11-17 Age 18 and older Visits may include: Medical history Physical exam Questionnaires Oral exam Blood and urine tests Cheek swab: a cotton swab will be wiped across the inside of the cheek several times. Cone beam CT scan (CBCT): x-rays create an image of the head, face, teeth, and neck. Participants will stand still or sit on a chair for about 20 minutes while the scanner rotates around the head. Photos of the head and face Offsite participants will provide: Copies of medical and dental records Leftover tissue samples from previous surgery Blood sample or cheek swab
Cystic fibrosis can affect organs other than the lungs. Liver disease affects about 30% of patients: its main manifestation is the development of portal hypertension (PHT). The pathophysiology of this comorbidity is still poorly understood. It was previously considered secondary to the formation of biliary cirrhosis but another hypothesis would be that of a primitive pathology of venous vessels may cause the gradual emergence of portal hypertension without cirrhosis. Evidence indiscutly suggest that cystic fibrosis is associated with a specific endothelial dysfunction, especially as the CFTR (Cystic Fibrosis Transmembrane conductance Regulator) protein is expressed on the surface of endothelial cells. The investigators hypothesize that liver disease related to PHT−associated cystic fibrosis is associated with systemic endothelial dysfunction. The aim is: To demonstrate a systemic endothelial dysfunction in patients with cystic fibrosis when associated with PHT. To study the correlations between measures of systemic endothelial function and serum markers of endothelial dysfunction and between measures of liver stiffness and systemic endothelial function.
This is a follow up study which aims to evaluate the correlation between several methylated genes (potential biomarkers) and oral cancers. A prospective case control trial is designed with sample size of at least 300 cases with estimated 200 subjects with precancerous lesion or oral cancer, and 100 subjects with normal oral mucosa. This study is approved by the National Taiwan University Hospital Research Ethics Committee. After signing the informed consent, all subjects will receive an intraoral examination and followed by epithelial cells collection with oral swab. The gDNA will be extracted from the oral swab collected cells and followed by bisulfite conversion procedures. Subsequently, bisulfite converted DNA will be subjected to methylated gene detection by Real-Time PCR. The methylation index (clinical sensitivity and specificity) of oral cancer related genes will be evaluated. For diagnosis confirmation, photos and biopsy specimens will be taken upon observation of abnormal lesion.
This study is being conducted at Healthcare Global Enterprises Ltd to evaluate the role of a novel Tracheo-Esophageal voice Prosthesis for total laryngectomy +/- partial pharyngectomy patients. 30 patients will be enrolled as an inpatient or outpatient. Patients who are planned to undergo total laryngectomy +/- pharyngectomy surgery and trachea-esophageal puncture procedure.(for primary TEP insertion) or patients who have undergone total laryngectomy > 6weeks prior and are suitable candidates for secondary TEP insertion would be recruited to the study. Insertion of the TEP will be done in primary setting or secondary setting. Patients, who are undergoing primary TEP insertion, will be evaluated for speech/ voice at an interval of 6 weeks, 12 weeks and 6 months after the procedure. Patients who are undergoing secondary TEP insertion to be evaluated on the same day of the procedure along with evaluation at an interval of 6 weeks, 12 weeks and 6 months. All the patients will be evaluated clinically for a fluid leak (through and around the TEP) on the same days of voice analysis by giving test feeds under supervision.
Esophageal cancer is a highly lethal disease, and its incidence is still increasing in the world. Recent advances in image-enhanced techniques such as Lugol chromoendoscopy and narrow band imaging, the number of patients with early esophageal squamous cell neoplasias (ESCNs) detected has markedly increased. Endoscopic submucosal dissection (ESD) enables en bloc resection of the neoplasia, and the resected specimen allows for a pathological assessment to evaluate the curability. However, the patients who received complete ESD for early ESCNs frequently developed metachronous recurrence. The cumulative metachronous recurrence rate at 5 years was 50%, and the mean annual incidence of newly diagnosed metachronous tumors was 10%. Among them, those with "speckled" lugol staining pattern over the esophageal background mucosa have the highest risk and should be seen as a precancerous lesion of ESCCs. This issue is gaining attention in the era of endoscopic treatment, but currently there was no appropriate strategy to prevent the tumor recurrence in these high-risk subjects. Endoscopic radiofrequency ablation (RFA) is a rapidly evolving therapeutic modality, and recent studies have shown its efficacy and safety for eradicating for flat type early ESCNs. To search a best strategy for the prevention of ESCNs, the investigators thus propose a hypothesis that the preemptive RFA for esophageal "speckled" lugol background mucosa may prevent the metachronous neoplastic recurrence after complete endoscopic resection.
The purpose of this study is to evaluate the beta-adrenergic receptor gene polymorphisms in the long-term effects of beta-blockade in patients with chronic heart failure.
The sit-to-stand (STS) movement is a key functional movement critical to independent living. This movement is physically demanding to conduct, especially in older adults, and in the presence of physical impairments associated with a range of conditions, such as stroke, osteoarthritis, Parkinson disease and hip arthroplasty. A limited capacity to perform this movement increases the risk of falls, dependency and increased support for personal care and rehabilitation. Restoring independence in this movement is, therefore, considered a priority for physical rehabilitation. Sit-to-stand capacity can be regained through participating in rehabilitation exercises. Providing feedback on performance of this movement could enhance the training. Thus, it is an essential aspect of physical therapy. Healthcare providers are required to meet the needs of an increasingly frail population as well as meeting national, evidence-based, guidelines for improving outcomes in conditions such as stroke which includes an increase in the practice repetition of functional movements. Reliance on rehabilitation staff to provide practice, however, places a limit on practice volume, potentially restricting outcomes. Using technology to enhance safe, repetitive practice of this movement with minimal supervision from skilled professionals would be beneficial to patients and rehabilitation services. The primary aim of this study is to test the acceptability and feasibility of a STS training system that enhances movement feedback to patients undergoing rehabilitation. A secondary aim is to gather data on the effectiveness of the system compared to conventional rehabilitation. This information will inform a statistically powered phase 2 trial.
This randomized clinical trial studies how well online genetics educational video with or without pre- and/or post-telephone genetics counseling works in assessing cancer-risk distress in patients with triple negative breast cancer. Online genetic education and telephone genetic counseling may help the doctors learn the stress a person feels about their risk of cancer.
Based on accumulating evidence showing that hypothyroid status is associated with poor prognosis among heart failure (HF) patients, the study is designed to evaluate whether replacement treatment with levothyroxine could have beneficial effects on patients with HF and subclinical hypothyroidism. The study is a prospective, randomized, parallel-group trial to assess the efficacy and safety of levothyroxine replacement on evidence-based HF standard therapy in stable chronic heart failure patients with subclinical hypothyroidism.