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Related Concept Videos

Clinical Trials01:16

Clinical Trials

6.7K
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...
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Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches01:23

Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches

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Biopharmaceutical studies constitute a vital field aiming to enhance drug delivery methods and refine therapeutic approaches, drawing upon diverse interdisciplinary knowledge. In research methodologies, the choice between controlled and non-controlled studies significantly influences the study's reliability and accuracy.
Non-controlled studies, commonly employed for initial exploration, lack a control group, rendering them susceptible to biases and external influences. In contrast,...
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Clinical Trials: Overview01:11

Clinical Trials: Overview

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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...
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Ethics in Research01:56

Ethics in Research

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Today, scientists agree that good research is ethical in nature and is guided by a basic respect for human dignity and safety. However, this has not always been the case. Modern researchers must demonstrate that the research they perform is ethically sound.
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Nursing Ethical Principles II01:27

Nursing Ethical Principles II

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Ethical principles are essential in guiding nurses to fulfill their responsibilities, focusing on the quality of nursing care and decision-making. These principles, including autonomy, beneficence, non-maleficence, justice, and fidelity, shape the ethical framework within healthcare settings.
Consider the following scenario, which illustrates how these principles are applied in the care of Mr. John, a fifty-year-old teacher diagnosed with metastatic liver cancer.
Initially, Mr. John's...
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Blinding01:11

Blinding

2.4K
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.
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Related Experiment Video

Updated: Jun 24, 2025

A Clinical Trial Assessing the Safety, Efficacy, and Delivery of Olive-Oil-Based Three-Chamber Bags for Parenteral Nutrition
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A Clinical Trial Assessing the Safety, Efficacy, and Delivery of Olive-Oil-Based Three-Chamber Bags for Parenteral Nutrition

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Single-arm clinical trials: design, ethics, principles.

Minyan Wang1, Huan Ma1, Yun Shi1

  • 1Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China.

BMJ Supportive & Palliative Care
|June 4, 2024
PubMed
Summary
This summary is machine-generated.

Single-arm trials offer an alternative to randomized controlled trials when the latter are not feasible. These trials are scientifically reasonable, cost-effective, and ethically advantageous for specific research areas.

Keywords:
Clinical assessmentClinical decisions

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Area of Science:

  • Clinical Research Methodology
  • Biostatistics
  • Evidence-Based Medicine

Background:

  • Randomized controlled trials (RCTs) are the gold standard but face feasibility challenges.
  • Single-arm trials address limitations in study population, evidence acquisition, cost, and ethics.
  • These trials are crucial for advanced cancers, rare diseases, and novel interventions.

Purpose of the Study:

  • To evaluate the scientific rationale and practical advantages of single-arm trial designs.
  • To compare single-arm trials with randomized controlled trials and cohort studies.
  • To identify the appropriate contexts for employing single-arm trial methodologies.

Main Methods:

  • The study reviews the design principles and comparative strengths of single-arm trials.
  • It contrasts single-arm trials with randomized controlled trials and cohort studies regarding rigor and evidence levels.
  • Ethical considerations and practical limitations of single-arm trials are discussed.

Main Results:

  • Single-arm trials offer ethical benefits like equitable treatment and respect for patient preferences.
  • They require smaller sample sizes and shorter durations, reducing costs compared to RCTs.
  • While lacking randomization and blinding, they maintain control, balance, and replication principles.

Conclusions:

  • Single-arm trials are scientifically reasonable and offer practical advantages in specific scenarios.
  • They provide higher evidence levels than cohort studies due to intervention and reduced external interference.
  • Researchers should consider single-arm trials when randomized controlled trials are not feasible.