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Related Experiment Videos

Intravenous flunitrazepam as an anesthetic induction agent.

H H Chiu, P P Ang, T H Lean

    Anaesthesia and Intensive Care
    |November 1, 1976
    PubMed
    Summary

    Flunitrazepam, a fluorinated benzodiazepine, was evaluated for its effects in patients receiving epidural analgesia. While generally well-tolerated with sedative and amnesic benefits, dosage influenced unconsciousness and side effects like injection pain and transient apnea were noted.

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    Area of Science:

    • Pharmacology
    • Anesthesiology
    • Neurology

    Background:

    • Benzodiazepines are commonly used for sedation and anxiety reduction.
    • Flunitrazepam is a potent fluorinated benzodiazepine with sedative properties.
    • Lumbar epidural analgesia is a common method for pain management.

    Purpose of the Study:

    • To evaluate the effects of flunitrazepam when administered intravenously as a supplement to lumbar epidural analgesia.
    • To determine the dose-related effects of flunitrazepam on sleep onset, unconsciousness, and patient acceptance.
    • To assess the safety profile of flunitrazepam, including respiratory and cardiovascular effects.

    Main Methods:

    • Eighty patients were included in the study.
    • Flunitrazepam was administered intravenously at doses of 2 mg, 3 mg, or 4 mg.

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  • The study monitored sleep onset time, level of consciousness, pain during injection, respiratory rate, and cardiovascular parameters.

    • Main Results:

    • Sleep onset was dose-related, exceeding one minute in most patients.
    • Unconsciousness was achieved in all patients receiving 4 mg, but not consistently at lower doses.
    • Minor cardiovascular depression and transient respiratory changes (apnea in two patients) were observed. Pain during injection was common.
    • Recovery was slow, but sequelae were minimal.

    Conclusions:

    • Flunitrazepam effectively induces sleep and provides sedation and amnesia, contributing to patient acceptance when supplementing epidural analgesia.
    • Dosage is critical for achieving unconsciousness, with 4 mg being consistently effective.
    • While generally safe with minimal sequelae, potential side effects such as injection pain and transient respiratory depression should be considered.