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Related Concept Videos

Effects of feedback01:24

Effects of feedback

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Feedback in control systems plays a critical role in shaping various operational parameters, extending beyond simple error reduction to influence stability, bandwidth, gain, impedance, and sensitivity. Understanding these effects requires examining a basic feedback system characterized by defined input, output, error, and feedback signals.
Feedback significantly modifies the gain of a control system. The gain of a system without feedback is altered by a factor of one plus GH, where G represents...
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Feedback control systems01:26

Feedback control systems

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Feedback control systems are categorized in various ways based on their design, analysis, and signal types.
Linear feedback systems are theoretical models that simplify analysis and design. These systems operate under the principle that their output is directly proportional to their input within certain ranges. For instance, an amplifier in a control system behaves linearly as long as the input signal remains within a specific range. However, most physical systems exhibit inherent nonlinearity...
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Feedback Inhibition00:46

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Biochemical reactions are occurring constantly in cells, converting starting substances to different products, usually with the help of enzymes that speed the reactions. Without enzymes, it would take far too long for most reactions to occur to be useful to the cell!
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Feedback Loops01:01

Feedback Loops

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In most cases, excessive hormone production is prevented by negative feedback—a loop that starts with a stimulus inducing the release of a particular substance, like a hormone, to maintain a certain level before triggering a signal that results in a decrease in further release of the hormone.
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Communication01:28

Communication

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Sharing information, concepts, and emotions to foster mutual understanding is communication. The sender, recipient, and transaction must be considered in this manner. The sender is the person who shares the message, the recipient is the person who receives and understands the message, and the transaction is the method used to deliver the message and the variables that affect the communication's context and surroundings. The nurse-client connection is built on therapeutic communication.
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Crossover Experiments01:16

Crossover Experiments

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Crossover experiments, also called the repeated-measurements design, is a study design in which all experimental units are exposed to all treatments in different periods. Crossover experiments are generally used in psychology, the pharmaceutical industry, agriculture, and medicine.
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Updated: Apr 4, 2026

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[Experience feedback committees (CREX) and beyond…].

N Pourel1, C Meyrieux-Croset2, A Isambert3

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Cancer Radiotherapie : Journal De La Societe Francaise De Radiotherapie Oncologique
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PubMed
Summary
This summary is machine-generated.

French radiation oncology departments use experience feedback committees (Crex) to analyze medical errors and near misses. This review explores the successes and challenges of this system, aiming to improve patient safety in radiotherapy.

Keywords:
Adverse eventsAnalyse systémiqueExperience feedbackMéthode Orion(©)Orion(©) methodRadiotherapyRadiothérapieRetour d’expérienceSafetySystemic analysisSécuritéÉvènements indésirables

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Area of Science:

  • Medical Physics
  • Radiation Oncology
  • Patient Safety

Context:

  • Implementation of experience feedback committees (Crex) in French radiation oncology departments since the late 2000s.
  • Driven by French agencies (ANAP, HAS) and ASN decision DC-0103.
  • Focus on systematic analysis of errors and near misses in patient care.

Purpose:

  • To summarize the methodology, successes, and challenges of Crex committees in radiation oncology.
  • To explore the evolution of patient safety practices beyond current Crex structures.
  • To identify future steps for enhancing care security within radiotherapy teams.

Summary:

  • Experience feedback committees (Crex) systematically analyze errors and near misses in French radiation oncology, using methods like the Orion method.
  • These committees, established under regulatory incentives, aim to improve patient safety through event analysis.
  • The article reviews the practical application and limitations of Crex, looking towards future advancements.

Impact:

  • Potential to enhance patient safety protocols in radiation oncology through structured error analysis.
  • Provides insights into the effectiveness and limitations of current safety feedback systems.
  • Informs the development of next-generation strategies for securing patient care in radiotherapy settings.