NCT05866419 · Alcyone Therapeutics, Inc
Study of an Intrathecal Port and Catheter System for Subjects With Spinal Muscular Atrophy
(PIERRE)
What this study is about
The primary objective of the clinical investigation is to demonstrate successful clinical use of the ThecaFlex DRx™ System in delivering nusinersen in subjects with spinal muscular atrophy (SMA). All enrolled subjects will undergo implantation of the experimental device (ThecaFlex DRx™ System) and will be followed for 12 months after receiving the implant.
View original scientific description
The primary objective of the clinical investigation is to demonstrate successful clinical use of the ThecaFlex DRx™ System in delivering nusinersen in subjects with spinal muscular atrophy (SMA). All enrolled subjects will undergo implantation of the investigational device (ThecaFlex DRx™ System) and will be followed for 12 months after receiving the implant. The 12-month data will be used to assess the primary endpoint support a Pre-Market Approval (PMA) application.
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Subject is 3 years or older
- Subject diagnosed with SMA who are candidates for Spinraza treatment as indicated in its label
- Subject resistant to lumbar puncture (LP), where resistance is defined as:
- Subject with respiratory issues or other comorbidities who is at an increased risk for complications due to the need for repeat anesthesia and imaging radiation exposure to safely perform LP; or
- Subjects for whom the treating physician determines implantation of the ThecaFlex DRx™ System is otherwise in the subject's best interest
- Subject has been prescribed nusinersen via chronic intrathecal bolus administration in accordance with the drug labeling and first port access of the ThecaFlex DRx system is planned within 2 weeks of implantation
- Subject, per Investigator discretion, is able to undergo a percutaneous or open surgical procedure for index port and catheter implantation where at least 7 cm of the ThecaFlex DRx system catheter will be placed intrathecally
- Subject (or subject's legally authorized representative) is willing and able to provide written informed consent; and
- Subject and parent/caregiver able and willing to complete all clinical investigation procedures, measurements, and visits.
Exclusion criteria
- Subject meets any of the contraindications for use of the ThecaFlex DRx™ System as outlined in the ThecaFlex DRx™ System Instructions for Use
- Presence or history of (\< 6 months prior to the procedure): an implanted microinfusion pump, intrathecal catheter, or other intrathecal drug delivery devices/component, or implanted shunt for drainage of cerebrospinal fluid (CSF), or reservoir in the CSF space (note: any ThecaFlex Port and Catheter System must not be placed in the same location as a previous indwelling port and catheter)
- Subject is pregnant or nursing or plans to become pregnant during the course of the clinical investigation
- Any condition or event, which in the opinion of the Investigator may adversely affect the safety and effective implantation and use of the ThecaFlex DRx™ system or confound the clinical investigation, including:
- Severe structural impediment that may preclude safe implantation of the catheter and port
- Major medical events within 60 days prior to screening; or
- Relevant surgeries (e.g., head and neck, back, etc.) within 60 days prior to screening or planned during the duration of the clinical investigation
- Space-occupying lesion with mass effect
- Posterior fossa mass
- Arnold-Chiari malformation
- Coagulation abnormalities and/or thrombocytopenia
- Insufficient or inadequate skin or underlying fat to adequately protect the port or enough surface area to allow the skin to close safely
- Subject is contraindicated for administration of nusinersen per its approved labeling
- History of intrathecal granuloma formation
- History of bacterial meningitis or aseptic meningitis within 6 months of screening
- History of tumors or other spinal abnormalities documented by magnetic resonance imaging (MRI) or computed tomography (CT) that would interfere with the catheter implantation procedures or CSF circulation
- History of hydrocephalus
- Diagnosed degenerative muscular disease other than SMA
- History of depression, cognitive impairment, or another psycho-behavioral problem that in the opinion of the Investigator may preclude safe participation in the clinical investigation and
- Serious medical condition that, in the opinion of the investigator, may lead to reduced life expectancy beyond 12 months.
- Subject is involved in another Investigation Device Exemption Study.
Where
- Phoenix, Arizona
- Orange, California
- Palo Alto, California
- San Diego, California
- Orlando, Florida
- Chicago, Illinois
- Boston, Massachusetts
- Grand Rapids, Michigan
- New York, New York
- Cleveland, Ohio
- Hershey, Pennsylvania
- Philadelphia, Pennsylvania
And 3 more locations — see the full list below.
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Apr 16, 2026 · Source of record for eligibility and locations