NCT07438275

NIRS and BIS Monitoring During Cerebral Aneurysm Coiling

Evaluation of Near-Infrared Spectroscopy and Bispectral Index Monitoring During Cerebral Aneurysm Coil Embolization

• Status: Not Yet Recruiting
• Phase: —
• Study type: Observational
• Enrollment: 75 (estimated)
• Sponsor: Dokuz Eylul University · Academic / Other
• Sex: All
• Age: 18 Years – 75 Years
• Healthy volunteers: Not accepted

Summary

This prospective observational study aims to evaluate the effectiveness of Near-Infrared Spectroscopy (NIRS) and Bispectral Index (BIS) monitoring during endovascular coil embolization of cerebral aneurysms under general anesthesia. Changes in regional cerebral oxygen saturation (rSO₂) measured by NIRS will be assessed in relation to BIS values and hemodynamic parameters throughout the procedure. The frequency, duration, and severity of cerebral desaturation episodes detected by NIRS, as well as their association with anesthetic depth and hemodynamic fluctuations, will be analyzed. The study does not involve any additional intervention beyond routine clinical monitoring.

Detailed description

Cerebral aneurysm coil embolization carries a potential risk of cerebral hypoperfusion and ischemia during the intraoperative period. Near-Infrared Spectroscopy (NIRS) provides continuous, non-invasive monitoring of regional cerebral oxygen saturation, while Bispectral Index (BIS) allows assessment of anesthetic depth. In this prospective observational study, adult patients undergoing endovascular coil embolization for cerebral aneurysms under general anesthesia will be monitored using standard anesthesia monitoring, including NIRS and BIS, which are part of routine clinical practice at the study center. Baseline NIRS and BIS values will be recorded prior to anesthetic induction, followed by continuous intraoperative monitoring at predefined time points. A decrease of ≥20% from baseline rSO₂ will be defined as clinically significant cerebral desaturation. Relationships between NIRS values, BIS measurements, and hemodynamic parameters will be evaluated. The study aims to contribute to the understanding of multimodal neuromonitoring during neuroendovascular procedures and to support clinical decision-making regarding cerebral protection strategies.

Conditions

• Cerebral Aneurysm

Interventions

Type	Name	Description
OTHER	Near-Infrared Spectroscopy (NIRS) and Bispectral Index (BIS) Monitoring	Near-infrared spectroscopy (NIRS) and bispectral index (BIS) monitoring are performed as part of routine intraoperative anesthesia monitoring during endovascular coil embolization for cerebral aneurysm. No additional intervention beyond standard clinical care is applied; data are recorded observationally.

Timeline

• Start date: 2026-03-01
• Primary completion: 2026-06-01
• Completion: 2026-10-01
• First posted: 2026-02-27
• Last updated: 2026-02-27

Locations

1 site across 1 country: Turkey (Türkiye)