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Completed

NCT Number: NCT06609538

The Impact of Preoperative Suggestion on Dreaming

Recent studies have shown that positive preoperative suggestions can significantly influence the quality of dreams and reduce the incidence of unpleasant dreams during sedation with agents like ketamine and propofol.

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Key information

Conditions

Dream, Day Behavior Health Behavior Ketamine Adverse Reaction Patient Satisfaction Propofol Adverse Reaction Treatment Adherence and Compliance

Age range

20 year–65 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

WonwangUH

Iksan, Please Select, 54538, South Korea

About this study

Cheong et al. demonstrated that a simple positive suggestion before ketamine administration could reduce unpleasant dreams, while Kim et al. found that propofol, compared to midazolam, led to more vivid and memorable dreams, along with similar satisfaction levels in patients. This study aims to extend these findings by comparing the effects of propofol and ketamine sedation on dreaming during anesthesia, with a focus on how preoperative suggestions might influence dream content, emotional tone, and patient satisfaction.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Adult patients aged 20-65 years.
  • ASA physical status I-III.
  • Scheduled for elective spinal anesthesia or brachial plexus block.
  • Fluent in Korean.

Exclusion criteria

  • Use of any medication, including premedication, within 12 hours before surgery.
  • Cognitive impairments or psychiatric disorders (including a history of unpleasant dreams or nightmares).
  • Current use of sedatives or hypnotics.
  • History of severe or recurrent nightmares.

Treatment and study plan

Control Group

Other

Receives standard preoperative instructions and propofol or ketamine infusion.

Other names: Propofol, Ketamine

Suggestion Group

Other

Receives positive preoperative suggestions and propofol or ketamine infusion.

Other names: Propofol, Ketamine

Primary outcomes

  1. Incidence of Dreaming

    Time frame: Dreaming will be assessed immediately after full awakeness in the Post-Anesthesia Care Unit (PACU).

    The "Dreaming and Cognition Evaluation Questionnaire" will be used.questionnaire evaluates the incidence of dreaming, as well as the dream's content, emotional tone (rated on a 1-5 scale from very unpleasant to very pleasant), memorability, visual vividness, intensity, and other qualitative aspects such as sound, movement, and emotional significance.

  2. Quality of Dreaming

    Time frame: Dreaming will be assessed immediately in the Post-Anesthesia Care Unit (PACU).

    The "Dreaming and Cognition Evaluation Questionnaire" will be used. This questionnaire evaluates the incidence of dreaming, as well as the dream's content, emotional tone (rated on a 1-5 scale from very unpleasant to very pleasant), memorability, visual vividness, intensity, and other qualitative aspects such as sound, movement, and emotional significance.

Secondary outcomes

  1. Satisfaction with Care

    Time frame: Satisfaction will be assessed immediately after full awakeness in the Post-Anesthesia Care Unit (PACU)

    A 101-point numerical rating scale included in the "Dreaming and Cognition Evaluation Questionnaire" will be used to measure patient satisfaction with the overall care and sedation experience.

  2. Adverse events

    Time frame: Monitoring will be continuous with regular vital signs recorded every 5 minutes during surgery and every 15 minutes in the PACU.

    Any complications such as hypotension,or bradycardia, will be recorded systematically.

Sponsors and collaborators

Lead sponsor

Wonkwang University Hospital

Other

Registry information

Official study title

The Impact of Preoperative Suggestions on Dreaming With Intravenous Sedation: A Randomized Controlled, Blinded Trial.

Important dates

Study start
2024
Primary completion
2024
Study completion
2025
First posted
Sep 24, 2024
Registry last updated
Feb 25, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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