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Related Concept Videos

Clinical Trials: Overview01:11

Clinical Trials: Overview

Clinical development focuses on how the drug will interact with the human body and encompasses four key phases of clinical trials, each serving a specific purpose in assessing the safety and effectiveness of new drugs. These phases overlap and build upon one another. Phase I involves a small group of healthy volunteers (typically 20-80 individuals) or, in cases where significant toxicity is expected, patients with the targeted disease, such as cancer or AIDS. The volunteers are tested for...
Clinical Trials01:16

Clinical Trials

Clinical trials are prospective experimental studies conducted on humans to determine the safety and efficacy of treatments, drugs, diet methods, and medical devices. Using statistics in clinical trials enables researchers to derive reasonable and accurate conclusions from the collected data, allowing them to make wise decisions in uncertain situations. In medical research, statistical methods are crucial for preventing errors and bias.
There are four phases in a clinical trial. A phase one...
Blinding01:11

Blinding

Blinding is a commonly used method of not telling participants which treatment a subject is receiving. Blinding is a critical part of a randomized control trial or RCT. It reduces the bias that affects the results. In an RCT, blinding is used in the form of a placebo. A placebo effect occurs when untreated subjects falsely believe they have received the treatment and report improved symptoms. A placebo or a dummy treatment is administered to subjects to negate the bias caused by such an effect.
Study Designs in Epidemiology01:20

Study Designs in Epidemiology

Epidemiological study designs are fundamental tools for investigating the distribution, determinants, and control of health conditions in populations. They help researchers understand the relationships between exposures and outcomes, and they broadly fall into two categories: "observational" and "experimental" studies.
Observational studies are those where the researcher does not intervene but rather observes natural variations. They include cross-sectional, cohort, and case-control studies.
Hazard Ratio01:12

Hazard Ratio

The hazard ratio (HR) is a widely used measure in clinical trials to compare the risk of events, such as death or disease recurrence, between two groups over time. It reflects the ratio of hazard rates—the instantaneous risk of the event occurring—between a treatment group and a control group. This measure provides valuable insights into the relative effectiveness of a treatment by assessing how the risk of an event differs between the two groups.
For example, in a clinical trial evaluating a...
Bioavailability Study Design: Healthy Subjects Versus Patients01:15

Bioavailability Study Design: Healthy Subjects Versus Patients

Bioavailability studies are essential for evaluating a drug's therapeutic efficacy and understanding its absorption patterns under various physiological conditions. Conducting such studies on target patient populations provides more relevant data by simulating real-world disease states. However, practical challenges often necessitate the use of young, healthy adult volunteers as study subjects.Patients may exhibit altered drug absorption patterns due to the effects of the disease itself,...

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AcT Trial: Protocol for a Pragmatic Registry-Linked Randomized Clinical Trial.

Tolulope Sajobi1, Nishita Singh2, Mohammed A Almekhlafi1,2,3,4

  • 1Department of Community Health Sciences University of Calgary Calgary AB Canada.

Stroke (Hoboken, N.J.)
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PubMed
Summary

This study compares tenecteplase to alteplase for acute ischemic stroke. Tenecteplase was found to be noninferior, offering a potential new treatment option for stroke patients.

Keywords:
acute strokeclinical trialsconsentemergencyethicspragmaticregistrythrombolysis

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Area of Science:

  • Neurology
  • Cardiovascular Diseases
  • Pharmacology

Background:

  • Alteplase is the standard thrombolytic for acute ischemic stroke.
  • Tenecteplase shows promise for improved safety and reperfusion.
  • This trial directly compares tenecteplase and alteplase efficacy.

Purpose of the Study:

  • To determine if tenecteplase is noninferior to alteplase.
  • To evaluate tenecteplase in a real-world clinical setting.
  • To assess safety and effectiveness in acute ischemic stroke patients.

Main Methods:

  • A randomized, controlled, open-label trial (AcT study) of 1600 patients.
  • Comparing intravenous tenecteplase (0.25 mg/kg) to alteplase (0.9 mg/kg).
  • Blinded assessment of 90-day modified Rankin Scale (mRS) scores.

Main Results:

  • The primary endpoint is the proportion of patients with a 90-day mRS score of 0-1.
  • Key safety outcomes include symptomatic intracerebral hemorrhage and mortality.
  • Data collected via central assessment and Canadian stroke registries.

Conclusions:

  • The trial will provide real-world evidence on tenecteplase versus alteplase effectiveness.
  • Results will inform clinical practice for acute ischemic stroke thrombolysis.
  • This study addresses a critical question in stroke treatment.