Clearance of Intracranial Blood Products by Continuous Irrigation With the IRRAflow System (CRYSTAL)

October 24, 2025 updated by: Christopher P Kellner
The study is a multi-center prospective cohort, controlled, phase 4 post-market registry evaluating the efficacy and radiographic outcomes associated with the use of the IRRAflow® Active Fluid Exchange System compared to standard of care external ventricular drains.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

The IRRAflow system offers automated irrigation, controlled drainage, and ICP monitoring all in one system for the treatment of intracranial hemorrhage - [Intracerebral hemorrhage (ICH), Intraventricular hemorrhage (IVH), Subarachnoid hemorrhage (SAH), Subdural hematoma (SDH)], intracranial abscess, and ventriculitis.

The analysis of the IRRAS catheter will occur prospectively if it is determined the patient meets the enrollment criteria. All patients enrolled in the trial will receive additional supportive and medical treatment by choice of the treating physician and in accordance with standard of care. Such treatment includes but is not limited to neurointensive care, neuromonitoring, and surgical or endovascular occlusion of identified sources of intracranial hemorrhage (e.g. vascular anomalies, aneurysms, etc.).

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Observational

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
250

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Contact Backup

Study Locations

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

The patient population for this study will be comprised of up to 250 patients with primary diagnosis of intracranial hemorrhage (SAH, ICH, IVH, SDH), ventriculitis, or intracranial abscess.

Description

Inclusion criteria:

  • Age >=18 years of age
  • Intracranial hemorrhage documented on head CT or MRI scan.
  • Indication for active fluid exchange evaluated by treating physician.
  • Signed informed consent obtained by patient or Legal Authorized Representative
  • Scheduled enrollment and treatment within 72 hours of last known well (LKW)

Exclusion criteria:

  • GCS ≤ 5
  • Pregnancy
  • Fixed and dilated pupil
  • Life-threatening medical condition

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort

Group / Cohort

A group or subgroup of participants in an observational study that is assessed for biomedical or health outcomes.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
IRRAflow device
All patients enrolled into the study will undergo treatment with the IRRAflow device
Device: IRRAflow® CNS (Active Fluid Exchange) System
The IRRAflow system offers automated irrigation, controlled drainage and intracranial pressure (ICP) monitoring all in one system. It consists of three main parts - IRRAflow 2.0 Catheter, IRRAflow Tube Set, IRRAflow Control Unit.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Residual blood volume by post bleed day 5
Time Frame: Post-procedure day 5
The residual blood volume at day 5 will be calculated to determine the efficacy of the IRRAflow system compared to other external ventricular drains (EVDs)
Post-procedure day 5
Utility weighted modified Rankin Score
Time Frame: End of study, at 6 months
Modified Rankin Scale score at 6 months will be collected to determine patient functional outcomes at 6 months. Scores range from 0 to 6, with 0 indicating no disability and 6 indicating death
End of study, at 6 months

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Rate of blood clearance
Time Frame: Immediately before and after the procedure
Rate of blood clearance will be calculated based on pre- and post-procedure blood volumes
Immediately before and after the procedure
Direct hospitalization costs
Time Frame: Discharge, up to 7 days post procedure
Direct hospitalization costs will be determined based on the hospital-reported cost of care for the entirety of the patient's hospital stay
Discharge, up to 7 days post procedure
NSICU Length of Stay
Time Frame: Discharge, up to 7 days post procedure
Hospital quality metrics will include length of neonatal surgery intensive care unit (NSICU) stay in days
Discharge, up to 7 days post procedure
Hospital Length of Stay (LOS)
Time Frame: Discharge, up to 7 days post procedure
Hospital quality metrics will include length of hospital stay in days
Discharge, up to 7 days post procedure
Proportion of participants needing a shunt
Time Frame: Discharge, up to 7 days post procedure
Proportion of participants needing a shunt will be calculated to determine how many patients needed a shunt to treat their hydrocephalus
Discharge, up to 7 days post procedure

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Christopher P Kellner

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
IRRAS

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Christopher Kellner, Icahn School of Medicine at Mount Sinai
  • Principal Investigator: Nicholas Brandmeir, West Virginia University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
September 25, 2025

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
January 1, 2031

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
July 1, 2031

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
October 16, 2024

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
October 17, 2024

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
October 18, 2024

Study Record Updates

Last Update Posted (Estimated)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
October 28, 2025

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
October 24, 2025

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
October 1, 2025

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • STUDY-24-01230

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

IPD Plan Description

Upon the completion of the study, Mount Sinai's data management team will clean and analyze all data in preparation of manuscript writing and publication. The intention will be to publish together between the principal investigator and the sponsor. Following publication, Mount Sinai will archive and store all associated data on its cloud-based system.

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

Yes

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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