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Not yet recruiting NCT07660861

Remifentanil vs Esmolol During Intubation for Cerebral Aneurysm Coil Embolization

No phase Interventional Cerebral Aneurysm Unruptured Intracranial Pressure

For patients and families

In plain language

An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.

What is being studied
The protocol lists: Remifentanil, Esmolol.
Who it may be relevant to
Registry conditions: Cerebral Aneurysm Unruptured, Intracranial Pressure. Basic parameters: from 18 years · All.
What needs checking
Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
Where it takes place
Turkey (Türkiye)
Next step
Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →

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Official title

Effects of Remifentanil Versus Esmolol on Optic Nerve Sheath Diameter/Eyeball Transverse Diameter Ratio During Endotracheal Intubation in Patients Undergoing Cerebral Aneurysm Coil Embolization: A Randomized Controlled Trial

Overview

Endotracheal intubation may cause significant increases in blood pressure, heart rate, and intracranial pressure, particularly in patients undergoing cerebral aneurysm coil embolization. Remifentanil and esmolol are commonly used agents to attenuate these responses during anesthesia induction. This randomized controlled trial aims to compare the effects of remifentanil and esmolol administered before endotracheal intubation on optic nerve sheath diameter/eyeball transverse diameter ratio (ONSD/ETD), a noninvasive surrogate marker of intracranial pressure, as well as hemodynamic responses in patients undergoing elective cerebral aneurysm coil embolization. The findings may help identify the most effective strategy for minimizing intubation-related intracranial pressure changes and hemodynamic fluctuations in neurointerventional anesthesia practice.

Detailed description

Endotracheal intubation is one of the most stimulating periods during induction of general anesthesia and is associated with transient increases in blood pressure, heart rate, and intracranial pressure. These responses may be particularly important in patients undergoing cerebral aneurysm coil embolization, where excessive hemodynamic fluctuations and increases in intracranial pressure may adversely affect procedural safety.

Optic nerve sheath diameter (ONSD) measured by ultrasonography has emerged as a noninvasive marker of intracranial pressure. The optic nerve sheath diameter-to-eyeball transverse diameter ratio (ONSD/ETD) has been proposed as a more standardized parameter that may reduce interindividual variability.

Remifentanil and esmolol are widely used agents for attenuation of the hemodynamic response to endotracheal intubation. Although both agents have been shown to reduce sympathetic activation during airway manipulation, their comparative effects on ONSD/ETD ratio and intubation-related intracranial pressure changes in patients undergoing neurointerventional procedures remain unclear.

The aim of this prospective randomized controlled trial is to compare the effects of remifentanil and esmolol administered before endotracheal intubation on ONSD/ETD ratio and hemodynamic parameters in adult patients undergoing elective cerebral aneurysm coil embolization. Participants will be randomized in a 1:1 ratio to receive either remifentanil (0.5-1 µg/kg IV) or esmolol (0.5-1 mg/kg IV) administered over 90 seconds before intubation.

ONSD/ETD measurements and hemodynamic parameters will be recorded before intubation (T0), 5 minutes after intubation (T1), and 10 minutes after intubation (T2). The primary outcome will be the change in ONSD/ETD ratio at 5 minutes after intubation. Secondary outcomes include changes in ONSD/ETD ratio at 10 minutes, mean arterial pressure, heart rate, and vasopressor requirements.

The results of this study may provide evidence regarding the optimal pharmacological strategy for attenuating intubation-related intracranial pressure changes and hemodynamic responses in patients undergoing cerebral aneurysm coil embolization.

Interventions

  • Drug Remifentanil
    Remifentanil 0.5-1 µg/kg IV administered over 90 seconds before endotracheal intubation.
  • Drug Esmolol
    Esmolol 0.5-1 mg/kg IV administered over 90 seconds before endotracheal intubation.

Primary outcome measures

  • Change in ONSD/ETD Ratio at 5 Minutes After Endotracheal Intubation [Time frame: 5 minutes after endotracheal intubation]
Secondary outcome measures (4)
  • Change in ONSD/ETD Ratio at 10 Minutes After Endotracheal Intubation [Time frame: 10 minutes after endotracheal intubation]
  • Change in Mean Arterial Pressure [Time frame: Baseline, 5 minutes, and 10 minutes after intubation]
  • Change in Heart Rate [Time frame: Baseline, 5 minutes, and 10 minutes after intubation]
  • Vasopressor Requirement [Time frame: From intubation until 10 minutes after intubation]

Eligibility criteria

Inclusion criteria

  • Age ≥18 years
  • American Society of Anesthesiologists (ASA) physical status I-III
  • Scheduled for elective cerebral aneurysm coil embolization under general anesthesia
  • Planned endotracheal intubation
  • Ability to provide written informed consent

Exclusion criteria

  • Emergency procedures
  • Hemodynamic instability before induction of anesthesia
  • Severe cardiac conduction abnormalities or clinically significant arrhythmias
  • Contraindication or allergy to remifentanil or esmolol
  • Chronic opioid use or opioid dependence
  • Known orbital disease, ocular trauma, or conditions interfering with optic nerve sheath diameter measurements
  • Anticipated difficult airway
  • Pregnancy
  • Refusal to participate in the study

Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.

Healthy volunteers: No

Study design

Allocation
Randomized
Model
Parallel assignment
Masking
Open label
Primary purpose
Treatment

Study locations

Turkey (Türkiye) · 1 center
  • Fatih Sultan Mehmet Training and Research Hospital — Istanbul

Publications

  • Öner, Ö., & Yıldız, E. (2020). Comparison of The Effects of Remifentanil, Fentanyl, Esmolol, Lidocaine, and Amiodarone in Preventing Hemodynamic Response to Intubation. Kahramanmaraş Sütçü İmam Üniversitesi Tıp Fakültesi Dergisi, 15(3), 22-29. https://doi.org/10.17517/ksutfd.673702
  • Kim KH, Kang HK, Koo HW. Prediction of Intracranial Pressure in Patients with an Aneurysmal Subarachnoid Hemorrhage Using Optic Nerve Sheath Diameter via Explainable Predictive Modeling. J Clin Med. 2024 Apr 4;13(7):2107. doi: 10.3390/jcm13072107. PMID 38610872
  • Fu H, Hu J, Zhang X, Xie K, Hu L. Effect of different anesthesia strategies on intracranial pressure during extubation after intracranial aneurysm embolization: a randomized controlled trial. Sci Rep. 2026 Apr 18;16(1):18034. doi: 10.1038/s41598-026-49045-6. PMID 42000868

Identifiers

NCT: NCT07660861 · ONSD/ETD

Primary sources (government registries)

View this study on ClinicalTrials.gov ↗