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NCT ID: NCT05040789 Withdrawn - COVID-19 Clinical Trials

Phase 3 Study to Evaluate the Lot Consistency of a Recombinant Coronavirus-Like Particle COVID-19 Vaccine

Start date: November 22, 2021
Phase: Phase 3
Study type: Interventional

This Phase 3 study is intended to assess clinical lot-to-lot consistency by evaluating and comparing the immunogenicity of three consecutively manufactured lots of Coronavirus-like Particle (CoVLP).

NCT ID: NCT04964596 Withdrawn - Adenomatous Polyps Clinical Trials

Managing Colorectal Cancer Prevention Procedure Wait Lists During the COVID-19 Pandemic

Start date: June 2022
Phase: N/A
Study type: Interventional

The main objective of this study is to offer and evaluate an interim triage approach for patients waiting for surveillance colonoscopies. This will reduce the waiting period and the psychological stressors for our patients and from a scientific point of view allow us to compare the yield of findings for each approach.

NCT ID: NCT04956250 Withdrawn - Clinical trials for Motor Vehicle Injury

Traffic Safety Study at Calgary Elementary Schools

Start date: May 1, 2020
Phase: N/A
Study type: Interventional

Installing specific traffic calming features designed to reduce vehicle speed and volume around schools may lead to a reduction in injury risk for child pedestrians and bicyclists, and may increase numbers of children walking and bicycling to school. Therefore, this study seeks to evaluate the effectiveness of specific built environment features at influencing traffic speed and volume, and active transportation, both immediately following installation and months later.

NCT ID: NCT04915144 Withdrawn - Clinical trials for Neuroendocrine Tumors

177Lu-DOTATOC for the Treatment of Patients With Somatostatin Receptor Positive NETs

Start date: January 15, 2023
Phase: Phase 2
Study type: Interventional

This study is to assess if personalized peptide receptor radionuclide therapy (PRRT) with 177Lu-DOTATOC results in fewer adverse events than standard PRRT. Subjects will be randomized to either receive personalized or standard PRRT. Personalized PRRT will be determined based on dosimetry calculations after the first cycle. In addition comparisons, will be made with progression-free survival, serial CT imaging, ctDNA, and quality of life questionnaires. Subjects will be followed for 5 years or until they have progression and are switched to another systemic treatment (not including treatment with somatostatin analogues).

NCT ID: NCT04887350 Withdrawn - Clinical trials for Major Depressive Disorder

SSIPP vs. PST vs. WLC

Start date: August 9, 2021
Phase: Phase 1
Study type: Interventional

The COVID-19 pandemic and continued lockdown measures have led to social isolation that is likely disproportionately affecting community-dwelling seniors. This social isolation of seniors is expected to cause detrimental health effects especially in those who have an ongoing or new onset late life depressive episode. The COVID-19 pandemic has also made accessing formal psychotherapy services increasingly difficult due to an increased demand for these services and a limited number of trained professionals available to deliver these interventions. We plan to conduct an open label, pilot, randomized controlled trial (RCT), comparing a virtually delivered (telephone) student led mental health supportive initiative, Student Senior Isolation Prevention Partnership (SSIPP) (n=15) compared to a telephone delivered standard psychotherapy intervention, problem-solving therapy (PST) (n=15) versus a wait list control (n=15) in community-dwelling seniors suffering from late life depression. Participants in this study will be blinded to the hypothesis, while those performing data analysis will be blinded to treatment allocation. Both SSIPP and PST will be delivered via telephone as a weekly session for 12-weeks. Feasibility measures of recruitment, retention and costs will be collected as primary outcome measures. Self-rated measures of depression, anxiety, isolation and resilience will comprise secondary exploratory outcomes. We anticipate that it will be feasible to conduct an RCT of these telephone interventions, SSIPP and PST, in socially isolated community-dwelling seniors. Data from this study will be critical to plan a subsequent confirmatory large-scale RCT. It could be that telephone delivered medical student led supportive intervention, SSIPP and/or a telephone delivered psychotherapy initiative, PST, can be feasibly applied in the current pandemic to a high-risk population, isolated seniors suffering from depression.

NCT ID: NCT04875221 Withdrawn - PTSD Clinical Trials

Network-based Neurofeedback in PTSD

Start date: October 1, 2023
Phase: N/A
Study type: Interventional

This project will examine the use of real-time fMRI (rt-fMRI) neurofeedback in the regulation of neural networks underlying symptoms experienced by individuals with posttraumatic stress disorder (PTSD). Investigators will use rt-fMRI neurofeedback in order to facilitate emotion regulation during symptom induction, and examine individual differences that influence regulation capacities.

NCT ID: NCT04870073 Withdrawn - Clinical trials for Coronary Artery Disease

Retrograde Autologous Priming and Mannitol for Reducing Hemodilution in Cardiac Surgery

RAPPER-MAN
Start date: September 21, 2022
Phase: Phase 3
Study type: Interventional

Hemodilution reduces concentrations of blood constituents: concentration of hemoglobin, red blood cells (hematocrit), physiological ions and coagulation factors that can contribute to impaired hemostasis and increasing the risk of perioperative blood transfusions. This pilot study will assess the feasibility of a large RCT to evaluate 2 techniques for reducing hemodilution during cardiac surgery: 1) retrograde autologous priming and 2) intraoperative mannitol. The aim of this pilot trial is to demonstrate feasibility of a larger trial to evaluate whether retrograde autologous priming and/or mannitol are superior to conventional priming alone.

NCT ID: NCT04842721 Withdrawn - Covid19 Clinical Trials

Effect of Hypertonic Saturated Saline Mouth Rinse on Covid-19 Virus in Vivo.

Start date: July 2021
Phase: Phase 2
Study type: Interventional

Sars-Cov2 virus is transmitted through the respiratory route and by direct contact with contaminated surfaces and subsequent contact with nasal, oral or ocular mucosa. Many studies have found that the oral cavity and specifically the saliva may be a high-risk route for SARS-CoV-2 infection. Thus, strategies reducing salivary viral load could contribute to reduce the risk of transmission. Furthermore, studies have shown that SARS-CoV persists for two days in oral mucous membranes before its diffusion to the lower respiratory tract. This offers an interesting preventive and therapeutic window of opportunity for the control of this disease. In addition, Naso-pharyngeal viral load was linked with lung disease severity in a study of 12 patients with pneumonia.**. Some current studies around the world, as listed on ClinicalTrials.gov, are testing the effect of some common mouth rinses/gargles on the Covid-19 viral load, including Chlorhexidine gluconate, Hydrogen peroxide Povidone Iodine, Saline (1.102% w/v, slightly hypertonic) and Alcohol. This study aims to test whether Prolonged Hypertonic Saline Mouth Rinse would reduce/eliminate*** the viral load in the Oro- Naso-Pharyngeal cavity, and could therefore be used as a strategy to reduce transmission risk in clinical and social settings. The investigator hypothesizes that COVID-19-positive participants who use Hypertonic Saline Prolonged Rinse treatment will have an reduction/elimination of their Covid viral load, will develop a negative Covid test 7 days after intervention completion and will improve their clinical symptoms, potentially reducing lung disease severity.

NCT ID: NCT04818736 Withdrawn - Clinical trials for Vaccine Preventable Disease

COVID-19 Vaccine For Indirect Protection

Start date: April 15, 2021
Phase: Phase 4
Study type: Interventional

The primary objective of this study is to test whether vaccinating adults ≥18 years in Hutterite colonies with mRNA-1273 (Moderna COVID-19) vaccine as compared to control (usual care) can prevent RT-PCR confirmed COVID-19 in non-vaccinated Hutterite members.

NCT ID: NCT04811937 Withdrawn - Adenomatous Polyps Clinical Trials

Development of a Computer-aided Polypectomy Decision Support

Start date: December 2021
Phase: N/A
Study type: Interventional

Quality components of colonoscopy include the detection and complete removal of colorectal polyps, which are precursors to CRC. However, endoscopic ablation may be incomplete, posing a risk for the development of "interval cancers". The investigators propose to develop a solution based on artificial intelligence (AI) (CADp computer-aided decision support polypectomy) to solve this problem.This research project aims to develop CADp, a computer decision support solution (CDS) for the ablation of colorectal polyps from 1 to 20 mm.