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Cerebral AneurysmsNOVANCT07246148

NOn-inVAsive Blood Pressure Monitoring in Intracranial Aneurysm Embolization

A study testing Non-invasive continuous blood pressure monitoring and Invasive arterial blood pressure monitoring in people with Cerebral Aneurysms and Intracranial Aneurysms, run by Korea University Anam Hospital at 1 site in South Korea.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
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Trial summary

The goal of this clinical trial is to evaluate whether non-invasive continuous blood pressure monitoring (NVBP) using the ClearSight system can safely serve as an alternative to radial arterial catheterization for invasive arterial blood pressure monitoring (IABP) in patients undergoing coil embolization for… Read more about this study

Who is it for?
Ages 19 to 80 years
What is being tested?
Non-invasive continuous blood pressure monitoring and Invasive arterial blood pressure monitoring
Type of treatment
Medical device
Could I receive a placebo?
No, everyone receives an active treatment
How many people
50 participants
Where
1 siteSouth Korea
Study dates
1 Jan 2026to 31 Aug 2027
Phase
Interventional
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 19 to 80 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Adult patients (≥19 and ≤80 years old) scheduled for elective coil embolization of unruptured intracranial aneurysms under general anesthesia.
  • American Society of Anesthesiologists (ASA) physical status classification I-III.

Who cannot join

  • Patients who do not provide informed consent.
  • Patients unable to understand or follow study instructions due to physical or mental limitations.
  • Patients in whom radial arterial catheterization is not feasible (e.g., peripheral vascular disease, skin disorders at the insertion site, absence of radial/ulnar artery, or orthopedic conditions of the upper extremity).
  • Patients with peripheral vascular circulatory disorders.
  • Patients with morbid obesity (BMI ≥ 40 kg/m²) [Eley et al., 2021].
  • Patients who are hemodynamically unstable preoperatively or expected to be unstable during the perioperative period.

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

Eunji Ko, M.D., Ph.D. contact

+82-10-3423-8249

froken.ko@gmail.com

South Korea1 site, 1 recruiting
  • Korea University Anam Hospital

    Seoul, 02841

    Eunji Ko, M.D., Ph.D., +82-2-920-5632, froken.ko@gmail.com

    Recruiting

Other trials in South Korea

About this study

Official title: A Randomized Controlled Trial on Non-Invasive Continuous Blood Pressure Monitoring as an Alternative to Radial Arterial Catheterization in Patients Undergoing Coil Embolization for Intracranial Aneurysms

The goal of this clinical trial is to evaluate whether non-invasive continuous blood pressure monitoring (NVBP) using the ClearSight system can safely serve as an alternative to radial arterial catheterization for invasive arterial blood pressure monitoring (IABP) in patients undergoing coil embolization for unruptured intracranial aneurysms.

The main questions it aims to answer are:

Read more
  • Does NVBP monitoring detect intraoperative hypotension and hypertension events with similar reliability compared to IABP?
  • Does NVBP monitoring reduce the need for invasive arterial catheterization without compromising patient safety or clinical outcomes?

Researchers will compare patients assigned to NVBP monitoring with those receiving conventional IABP monitoring.

Participants will:

  • Be randomly assigned to NVBP monitoring or standard IABP monitoring during coil embolization.
  • Receive continuous monitoring of cerebral oxygenation with near-infrared spectroscopy (rSO₂).
  • Undergo standard anesthesia induction, maintenance, and postoperative intensive care protocols.
  • Have their intraoperative hemodynamic events, vasopressor use, and postoperative outcomes recorded up to 30 days after the procedure.
Read the detailed description

Intracranial aneurysm coil embolization is a widely accepted treatment for unruptured aneurysms, but the procedure is frequently accompanied by hemodynamic instability, particularly episodes of hypotension and hypertension, which may increase the risk of neurological or cardiovascular complications. Continuous and reliable arterial blood pressure monitoring is therefore critical during the periprocedural period.

The conventional standard of care has been invasive arterial blood pressure (IABP) monitoring using a radial arterial catheter. Although IABP provides accurate real-time hemodynamic data, it is associated with procedural risks such as bleeding, hematoma, arterial occlusion, distal ischemia, infection, and patient discomfort. These risks are particularly relevant in patients undergoing neuroendovascular procedures where vascular access and anticoagulation may already increase complication risk.

The ClearSight™ system (Edwards Lifesciences, Irvine, CA, USA) is a non-invasive continuous blood pressure monitoring device that uses a finger cuff based on the volume clamp method and pulse contour analysis. Previous studies have validated its use in a variety of surgical and perioperative settings, including obese patients, vascular surgery, and cardiac surgery [Kim et al., 2014; Maheshwari et al., 2018; Bugarini et al., 2021; Chapalain et al., 2024]. However, its role as a primary monitoring modality during neuroendovascular procedures has not been fully established.

This randomized controlled trial (NOVA study) is designed to determine whether non-invasive continuous blood pressure monitoring (NVBP) can serve as a safe and effective alternative to radial IABP in patients undergoing coil embolization for unruptured intracranial aneurysms. Patients will be randomized in a 1:1 ratio to receive either NVBP monitoring (experimental arm) or standard IABP monitoring (control arm). All participants will also undergo cerebral oxygenation monitoring with O₃® Regional Oximetry (Masimo, CA, USA) to detect potential cerebral desaturation events.

In the NVBP group, invasive arterial pressure will not be obtained from a radial catheter but may be secondarily recorded from a femoral arterial catheter used for the endovascular procedure itself. Importantly, the femoral arterial waveform will not be displayed to the anesthesiologist but will be recorded by nursing staff to ensure patient safety and allow for event adjudication if NVBP and IABP values diverge significantly.

The primary endpoint of this study is the intraoperative incidence of hemodynamic events, defined as episodes of hypotension (mean arterial pressure <65 mmHg sustained for ≥1 minute) or hypertension (systolic blood pressure >120 mmHg sustained for ≥1 minute). Secondary endpoints include vasopressor and antihypertensive drug use (type, dose, frequency), incidence of cerebral desaturation events (≥20% reduction from baseline or absolute rSO₂ <50), ICU admission and length of stay, overall hospital length of stay, 30-day mortality, reoperation rate, and incidence of major postoperative complications (neurologic, cardiovascular, or acute kidney injury).

To minimize performance bias, intraoperative management will follow a standardized anesthetic protocol including induction with propofol, rocuronium, and remifentanil; maintenance with sevoflurane (1 MAC); ventilation targeting normocapnia; and postoperative reversal and extubation criteria. Clinical decision-making for vasoactive drug administration will follow predefined thresholds based on both blood pressure and rSO₂ monitoring criteria.

This study aims to provide pilot-level evidence on whether NVBP can reduce the need for radial arterial catheterization without compromising intraoperative safety or postoperative outcomes. If successful, NVBP may represent a less invasive, safer, and patient-friendly monitoring option for neurointerventional procedures, with broader implications for perioperative practice in patients where invasive arterial access is either undesirable or technically challenging.

Being tested
Non-invasive continuous blood pressure monitoring, Invasive arterial blood pressure monitoring
Keywords
non-invasive blood pressure monitoring, continuous arterial blood pressure monitoring, coil embolization, neuroanesthesia, cerebral oximetry, radial arterial catheterization
Medical subject headings
Intracranial Aneurysm

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Non-invasive continuous blood pressure monitoringDevice

    Continuous arterial blood pressure monitoring using a finger-cuff technology (e.g., ClearSight system). Applied in the experimental NVBP group.

  • Invasive arterial blood pressure monitoringDevice

    Standard radial arterial catheterization for continuous invasive blood pressure monitoring. Applied in the IABP control group.

Study groups in NCT07246148
Study groupRoleWhat they receive
NVBP groupExperimentalParticipants undergo continuous non-invasive blood pressure (NVBP) monitoring using the ClearSight system (Edwards Lifesciences, Irvine, CA, USA) during coil embolization for intracranial aneurysm. Cerebral oxygen saturation is simultaneously monitored with O₃® Regional Oximetry (Masimo, CA, USA). A femoral arterial catheter placed for endovascular access may serve as a backup for safety, but invasive radial arterial catheterization is not performed.
Receives: Device: Non-invasive continuous blood pressure monitoring
IABP groupActive comparatorParticipants undergo standard invasive arterial blood pressure (IABP) monitoring via radial arterial catheterization during coil embolization. Cerebral oxygen saturation is also monitored with O₃® Regional Oximetry (Masimo, CA, USA), identical to the NVBP group.
Receives: Device: Invasive arterial blood pressure monitoring

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Intra-procedural hemodynamic instability events (hypotension or hypertension events)

    Incidence of hemodynamic instability during coil embolization. Hypotension is defined as mean arterial pressure (MAP) < 65 mmHg sustained for ≥ 1 minute. Hypertension is defined as systolic arterial pressure > 120 mmHg sustained for ≥ 1 minute.

    Measured: During the procedure (Day 0)

Secondary outcomes (9)
  1. Use of vasoactive medications

    Name of vasoactive medications (vasopressors or antihypertensives) administered during the procedure

    Measured: During the procedure (Day 0)

  2. Dose of vasoactive medications (vasopressors or antihypertensives)

    cumulative dose of vasoactive medications administered during the procedure.

    Measured: During the procedure (Day 0)

  3. Cerebral oxygen desaturation events

    Incidence of cerebral oxygen desaturation, defined as ≥20% decrease from baseline or an absolute value <50 for ≥1 minute, measured by near-infrared spectroscopy (NIRS).

    Measured: During the procedure (Day 0)

  4. Length of hospital stay

    Duration (day) of hospitalization after coil embolization until discharge.

    Measured: Discharge day (typically postoperative 2 - 14 days)

  5. Incidence of ICU admission

    Incidence of ICU admission after embolization between two groups

    Measured: Discharge day (typically postoperative 2 - 7 days)

  6. length of stay in ICU

    duration of ICU stay (day)

    Measured: Discharge day (typically postoperative 2 - 7 days)

  7. 30-day mortality

    All-cause mortality within 30 days after the procedure.

    Measured: Postoperative Day 30

  8. Major complications within 30 days

    Incidence of neurological complications, cardiovascular complications, and acute kidney injury (KDIGO criteria).

    Measured: Postoperative Day 30

  9. Event detection rate of NVBP vs IABP

    Comparison of the ability of non-invasive blood pressure monitoring vs invasive arterial blood pressure monitoring to detect hypotension, hypertension, or cerebral desaturation events.

    Measured: Postoperative Day 30

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted24 Nov 2025
  2. Study start1 Jan 2026
  3. Primary completion1 Jun 2027 (estimated)
  4. Study completion31 Aug 2027 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Prevention
Allocation
Randomised
Intervention model
Parallel groups
Model description
Participants will be randomized in a 1:1 ratio into two parallel groups: the experimental arm (non-invasive blood pressure monitoring using ClearSight system) and the control arm (invasive radial arterial catheter monitoring).
Masking
Single blind
Who is masked
Outcomes assessor
Enrolment
50 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07246148
Sponsor's protocol ID
K2025-2494-001
Acronym
NOVA
Status last verified
Apr 2026
First submitted
1 Oct 2025
Last updated
9 Apr 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Undecided: The plan for IPD sharing has not been finalized. Although de-identified data may be valuable for future research, the study is investigator-initiated at a single center and does not currently have a secure platform for external data sharing. Data sharing may be reconsidered in the future after publication, depending on institutional policies and available resources.

Questions about this trial

What is this clinical trial studying?

A study testing Non-invasive continuous blood pressure monitoring and Invasive arterial blood pressure monitoring in people with Cerebral Aneurysms and Intracranial Aneurysms, run by Korea University Anam Hospital at 1 site in South Korea.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 2 inclusion and 6 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 9 Apr 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in South Korea. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Eunji Ko, M.D., Ph.D. (+82-10-3423-8249, froken.ko@gmail.com), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Intra-procedural hemodynamic instability events (hypotension or hypertension events) (time frame: During the procedure (Day 0)). It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 9 Apr 2026.

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