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Effect of Pre-injection of Rocuronium on Neuromuscular Blockade Onset Time and Hemodynamics During General Anesthesia Induction

16. Juli 2026 aktualisiert von: General Hospital of Ningxia Medical University

This is a single-center, prospective, randomized, controlled trial comparing pre-injection versus standard bolus administration of rocuronium bromide for general anesthesia induction. A total of 108 adult patients (18-65 years, ASA I-III) scheduled for elective surgery requiring endotracheal intubation will be enrolled and randomized 1:1 to either the pre-injection group or control group.

The pre-injection group will receive rocuronium 0.06 mg/kg as a priming dose followed by 0.54 mg/kg 3 minutes later. The control group will receive rocuronium 0.6 mg/kg as a single bolus. All patients will receive standardized anesthesia induction with midazolam and propofol.

The primary outcome is neuromuscular blockade onset time (seconds). Secondary outcomes include hemodynamic parameters (SBP, DBP, MAP, HR, CO, SV, SVR), injection pain incidence, and adverse events.

This study aims to investigate whether pre-injection of rocuronium can shorten neuromuscular blockade onset time while maintaining hemodynamic stability compared to standard bolus administration.

Studienübersicht

Status

Rekrutierung

Bedingungen

Intervention / Behandlung

Studientyp

Interventionell

Einschreibung (Geschätzt)

108

Phase

  • Unzutreffend

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienkontakt

Studienorte

      • Yinchuan, China
        • Rekrutierung
        • General Hospital of Ningxia Medical University
        • Kontakt:

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

  • Erwachsene
  • Älterer Erwachsener

Akzeptiert gesunde Freiwillige

Ja

Beschreibung

Inclusion Criteria:

  • Aged from 18 to 65 years old
  • American Society of Anesthesiologists (ASA) physical status classification Ⅰ, Ⅱ or Ⅲ
  • Elective surgery requiring general anesthesia with tracheal intubation
  • Able to understand the study and voluntarily sign written informed consent
  • Male or female, no gender restriction

Exclusion Criteria:

  • Severe hepatic dysfunction (ALT/AST > 3 times the upper limit of normal) or renal dysfunction (creatinine > 2 times the upper limit of normal)
  • Central nervous system diseases or severe neuromuscular disorders
  • Severe arrhythmia or cardiac dysfunction (NYHA class Ⅲ-Ⅳ, or ejection fraction EF < 30%)
  • Known hypersensitivity or allergy to rocuronium, midazolam, propofol or other study-related drugs
  • Refusal to participate in this clinical trial
  • Pregnant or breastfeeding women
  • History of predicted difficult airway requiring awake tracheal intubation
  • Contraindications to rapid sequence induction

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

  • Hauptzweck: Behandlung
  • Zuteilung: Zufällig
  • Interventionsmodell: Parallele Zuordnung
  • Maskierung: Vervierfachen

Waffen und Interventionen

Teilnehmergruppe / Arm
Intervention / Behandlung
Experimental: Pretreated Rocuronium Group
Low-dose rocuronium bromide is injected intravenously in advance before anesthesia induction
Aktiver Komparator: Conventional Administration Group
Rocuronium bromide is administered by standard routine intravenous injection during anesthesia induction

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Neuromuscular blockade onset time
Zeitfenster: Within 5 minutes after completion of rocuronium-bromide injection
The time interval from injection of rocuronium bromide to maximum neuromuscular block effect
Within 5 minutes after completion of rocuronium-bromide injection

Sekundäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Systolic Blood Pressure (SBP)
Zeitfenster: Baseline (before rocuronium-bromide injection), 0.5-minute, 1-minute, 2-minute, 3-minute and 5-minute after rocuronium-bromide injection。
Baseline (before rocuronium-bromide injection), 0.5-minute, 1-minute, 2-minute, 3-minute and 5-minute after rocuronium-bromide injection。
Diastolic Blood Pressure (DBP)
Zeitfenster: Baseline (before rocuronium-bromide injection), 0.5-minute, 1-minute, 2-minute, 3-minute and 5-minute after rocuronium-bromide injection。
Baseline (before rocuronium-bromide injection), 0.5-minute, 1-minute, 2-minute, 3-minute and 5-minute after rocuronium-bromide injection。
Mean Arterial Pressure (MAP)
Zeitfenster: Baseline (before rocuronium-bromide injection), 0.5-minute, 1-minute, 2-minute, 3-minute and 5-minute after rocuronium-bromide injection。
Baseline (before rocuronium-bromide injection), 0.5-minute, 1-minute, 2-minute, 3-minute and 5-minute after rocuronium-bromide injection。
Heart Rate (HR)
Zeitfenster: Baseline (before rocuronium-bromide injection), 0.5-minute, 1-minute, 2-minute, 3-minute and 5-minute after rocuronium-bromide injection。
Baseline (before rocuronium-bromide injection), 0.5-minute, 1-minute, 2-minute, 3-minute and 5-minute after rocuronium-bromide injection。
Cardiac Output (CO)
Zeitfenster: Baseline (before rocuronium-bromide injection), 0.5-minute, 1-minute, 2-minute, 3-minute and 5-minute after rocuronium-bromide injection。

Measurement instrument: Non-invasive continuous blood pressure and cardiac output monitoring system (Model T20A).

Measurement method: Finger cuff volume pulse wave plethysmography, the device automatically calculates real-time CO value, unit: L/min.

Assessment method: Record stable CO value after waveform stabilization for 10 seconds at each time point; compare absolute value and percentage change vs baseline to evaluate the hemodynamic effect of rocuronium.

Baseline (before rocuronium-bromide injection), 0.5-minute, 1-minute, 2-minute, 3-minute and 5-minute after rocuronium-bromide injection。
Stroke Volume (SV)
Zeitfenster: Baseline (before rocuronium-bromide injection), 0.5-minute, 1-minute, 2-minute, 3-minute and 5-minute after rocuronium-bromide injection。

Measurement instrument: Non-invasive continuous blood pressure and cardiac output monitoring system (Model T20A).

Measurement method: Continuous finger pulse wave monitoring, automatic calculation of stroke volume (unit: mL/beat).

Assessment method: Record stable SV readings at each time point and analyze dynamic changes compared with baseline.

Baseline (before rocuronium-bromide injection), 0.5-minute, 1-minute, 2-minute, 3-minute and 5-minute after rocuronium-bromide injection。
Systemic Vascular Resistance (SVR)
Zeitfenster: Baseline (before rocuronium-bromide injection), 0.5-minute, 1-minute, 2-minute, 3-minute and 5-minute after rocuronium-bromide injection。

Measurement device: Non-invasive continuous blood pressure and cardiac output monitor (Model T20A).

Measurement method: SVR (unit: dyn·s·cm-⁵) is automatically calculated by the monitor using real-time mean arterial pressure, central venous pressure and cardiac output.

Assessment: SVR values were recorded once readings stabilized to assess changes in total peripheral vascular resistance after rocuronium administration.

Baseline (before rocuronium-bromide injection), 0.5-minute, 1-minute, 2-minute, 3-minute and 5-minute after rocuronium-bromide injection。
Injection Pain
Zeitfenster: Pain assessment is performed within 5 minutes after completion of rocuronium injection.

Four-point grading scale for evaluating limb withdrawal reaction induced by injection pain:

0 = No limb contraction or twitching;

  1. = Only slight wrist movement, no movement of other arm joints;
  2. = Entire arm movement/withdrawal involving elbow, shoulder and other joints;
  3. = Systemic response with movements across multiple limbs beyond one single limb.

Subjects with a score ≥1 are defined as having injection pain.

Pain assessment is performed within 5 minutes after completion of rocuronium injection.
Limb Withdrawal Response
Zeitfenster: Assessment shall be completed within 5 minutes after rocuronium injection.

Four-point grading scale for evaluating limb withdrawal reaction induced by injection pain:

0 = No limb contraction or twitching;

  1. = Only slight wrist movement, no movement of other arm joints;
  2. = Entire arm movement/withdrawal involving elbow, shoulder and other joints;
  3. = Systemic response with movements across multiple limbs beyond one single limb.

Subjects with a score ≥1 are defined as having injection pain.

Assessment shall be completed within 5 minutes after rocuronium injection.
Adverse Events
Zeitfenster: Continuous assessment from the start of anesthesia induction until the end of surgery; the maximum assessment period is the perioperative period of a single operation.

Record adverse events occurring during perioperative period, including severe bradycardia (heart rate <45 beats per minute), hypotension (mean arterial pressure MAP <65 mmHg), various arrhythmias and allergic reactions. The number and incidence of each type of adverse event will be counted.

Assessment method: Vital signs are continuously monitored intraoperatively. Anesthesiologists identify and record all eligible adverse events in real time, with documentation of onset time, duration and corresponding interventions.

Continuous assessment from the start of anesthesia induction until the end of surgery; the maximum assessment period is the perioperative period of a single operation.

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Sponsor

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn (Geschätzt)

1. Juli 2026

Primärer Abschluss (Geschätzt)

1. Dezember 2026

Studienabschluss (Geschätzt)

1. Dezember 2026

Studienanmeldedaten

Zuerst eingereicht

4. Juli 2026

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

16. Juli 2026

Zuerst gepostet (Tatsächlich)

21. Juli 2026

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

21. Juli 2026

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

16. Juli 2026

Zuletzt verifiziert

1. Juli 2026

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Andere Studien-ID-Nummern

  • KYLL-2026-0131

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