for people ages 18-75 (full criteria)
at Sacramento, California and other locations
study started
completion around



The purpose of this study is to test an experimental device, the Adherus AutoSpray and Adherus AutoSpray ET Dural Sealant, in spinal surgical procedures.

This study is being done to compare Adherus AutoSpray and Adherus AutoSpray ET Dural Sealant to DuraSeal Exact Spinal Sealant, which has already received Federal Food and Drug Administration (FDA) approval in spinal procedures.

Official Title

A Pivotal Clinical Trial Evaluating the Safety and Effectiveness of Adherus™ AutoSpray and Adherus™ AutoSpray ET Dural Sealant When Used as a Dural Sealant in Spinal Procedures


This is a prospective, randomized, controlled, single-blind, multicenter, pivotal trial that will evaluate the safety and effectiveness of Adherus Dural Sealant when used in conjunction with standard methods of dural repair in spinal procedures. This trial uses the commercially available DuraSeal Exact as an active control. The trial is designed to demonstrate non-inferiority of Adherus Dural Sealant to DuraSeal Exact.

Subjects who are undergoing spinal surgery, consent to participate in this trial and experience a durotomy will be considered for study enrollment. Following a two-tiered inclusion/exclusion consideration, subjects will be randomized intraoperatively using a 1:1 randomization ratio. Up to 114 subjects will be randomized to treatment with either Adherus Dural Sealant or DuraSeal Exact with at least 50% of subjects undergoing procedures at lumbar or lumbosacral levels. Up to 30 investigational sites within the United States will participate in this trial.

A primary composite endpoint evaluating safety and effectiveness will be measured within a 90-day required follow-up period post-procedure. Subjects will be followed at discharge or between postoperative days (POD) 1-4 from the index procedure (whichever occurs first) and at 30 days and 90 days post-index procedure.


Spinal Duraplasty, Adherus Dural Sealant, Adherus AutoSpray Dural Sealant, Dura mater, Durotomy, CSF leak, Adherus Dural Sealant System, DuraSeal Exact Dural Sealant System


You can join if…

Open to people ages 18-75

  1. Subject is ≥ 18 and ≤ 75 years old.
  2. Subject is scheduled for an elective spinal procedure that will require a planned durotomy.
  3. Subject requires a procedure involving a Class I/clean wound (uninfected surgical wound in which no inflammation is encountered).
  4. Subject is able and willing to provide informed consent and HIPAA authorization.
  5. Subject is able and willing to meet all study requirements, including attending all post-index procedure assessment visits and radiological tests.

    Intra-Operative Inclusion Criteria:

  6. Subject has durotomy edges that can be re-approximated using the investigator's standard methods of dural repair.

You CAN'T join if...

  1. Subject has clinically significant hydrocephalus or clinical evidence of altered CSF dynamics.
  2. Subject has a pre-existing external lumbar CSF drain or internal CSF shunt.
  3. Subject has experienced previous CSF leak (secondary to trauma, neoplasm, surgery, or other etiology).
  4. Subject is undergoing a Chiari malformation procedure.
  5. Subject has undergone a previous spinal procedure in the same anatomical location.
  6. Subject has had radiation treatment to the surgical site, or standard fractionated radiation therapy is planned within ten days post indexprocedure.
  7. Subject has spinal metallic implants that may cause significant imaging artifact on the MRI evaluation of the spine.
  8. Subject has metallic implant(s) that are not MRI compatible, e.g., cochlear implant, neurostimulator, stent, surgical clip, cardiac pacemakers, or other non-MRI compatible implants, or an elective implant of such devices is planned during the course of the study. Note: mercury amalgam dental fillings or similar metallic dental prostheses are not an exclusion criterion.
  9. Subject has a known malignancy or another condition with anticipated survival shorter than six months.

    10. Subject has undergone chemotherapy treatment, excluding hormonal therapy, within three

    weeks prior to the planned index procedure, or chemotherapy treatment is planned within two weeks after the index procedure is performed.

    11. Subject has been treated with chronic steroid therapy (defined as regular (daily)

    administration of steroid agent(s) for ≥ 8 weeks) unless discontinued greater than four weeks prior to the planned index procedure. Note: standard acute perioperative steroids are permitted; administration of steroid agents for < 8 weeks duration prior to the planned index procedure is permitted.

    12. Subject has received warfarin, heparin, other anticoagulant agents, aspirin or non

    steroid anti-inflammatory agents on a daily basis and pre-surgical, standard of care drug wash-out did not occur.

    13. Subject has a compromised immune system or autoimmune disease or is on chronic

    immunosuppressant agents at baseline.

    14. Subject has a systemic infection or evidence of any infection near planned operative


    15. Subject has a serum creatinine level > 2.0 mg/dL. 16. Subject has a serum total bilirubin > 2.5 mg/dL at baseline. 17. Subject has uncontrolled diabetes as evidenced by an HbA1c > 7% prior to surgery. 18. Subject has a known allergy to FD&C Blue #1 and/or FD&C Yellow #5 or any of the

    constituents of the dural sealants.

    19. Subject is pregnant, breast-feeding, or intends to become pregnant during the course

    of the study.

    20. Subject is participating in a clinical trial of another investigational drug or device

    and has not completed the required follow-up period.

    Intra-Operative Exclusion Criteria:

    21. Subject has an incidental finding that meets any pre-operative exclusion criterion

    listed above.

    22. Subject's dural defect cannot be closed with suture and/or duraplasty material. 23. Subject has a gap > 2 mm present between dural edges, or between the edge of dura and

    duraplasty material, based on visual estimate by surgeon before application of the surgical sealant.

    24. Subject had undergone laminoplasty decompression. 25. Subject had undergone a syringomyelia procedure where the shunt is not placed in the

    subarachnoid position.


  • University of California Davis Health
    Sacramento California 95817 United States
  • Stanford University
    Stanford California 94305 United States


accepting new patients
Start Date
Completion Date
Stryker Craniomaxillofacial
Sign up for this study
Study Type
Expecting 114 study participants
Last Updated