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End Stage Renal DiseaseNCT02532621

Clinical Evaluation of a Vascular Venous Anastomotic Connector [InterGraft VIG-only Study]

A study testing Venous InterGraft Connector, sutured arterial anastomosis of an implanted vascular graft for hemodialysis and hemodialysis in people with End Stage Renal Disease, run by Phraxis, Inc. at 10 sites in United States.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

The InterGraft™ Venous Anastomotic Connector provides an endovascular, minimally invasive means for attachment of an arteriovenous graft to a vein in the upper extremity. The InterGraft™ Venous Anastomotic Connector facilitates creation of the arteriovenous graft connection to a vein in support of hemodialysis in… Read more about this study

Who is it for?
Ages 18 years and older
Conditions the study is for
End Stage Renal Disease
What is being tested?
Venous InterGraft Connector, sutured arterial anastomosis of an implanted vascular graft for hemodialysis and hemodialysis
Could I receive a placebo?
No, everyone receives an active treatment
How many people
158 participants
Where
10 sitesUnited States
Study dates
21 Feb 2018to 19 Jan 2022
Phase
Interventional
Are there results?
Yes, posted in the registrySummary in the doctors' view

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 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Subject is ≥ 18 years of age.
  • Subject requires the creation of a vascular access graft for hemodialysis, secondary to a diagnosis of End Stage Renal Disease.
  • Subject is able to have the vascular access graft placed in an upper extremity.
  • Baseline imaging shows suitable vascular anatomy/ vessel size for the InterGraft™ Venous Connector and an artery at least 3.5 mm in diameter that is suitable for creating the arterial anastomosis.
  • Subject has a reasonable expectation of remaining on hemodialysis for at least 6 months.
  • Subject or his/her legal guardian understands the study and is willing and able to comply with the dialysis schedule and follow-up requirements.
  • Subject or his/her legal guardian provides written informed consent. NOTE: In accordance with the requirements of some Institutional Review Boards, where applicable, only those subjects with capacity to consent for themselves will be included. Thus, where required by the Institutional Review Board, adult individuals who lack capacity to consent for themselves will be excluded from the study.
  • Physician's examination at time of surgery shows no significant vessel lesions, calcification(s), anatomic structures or abnormalities that may limit ability to safely deploy the InterGraft Connectors or create a sutured arterial anastomosis.

Who cannot join

  • Subject has a documented and unsuccessfully treated ipsilateral central venous stenosis as determined by imaging.
  • Subject currently has a known or suspected bacterial, fungal, or HIV infection. NOTE: Patients with hepatitis B or C may be included in the study.
  • Subject has a known hypercoagulable or bleeding disorder or requires treatment with warfarin or heparin.
  • NOTE: The intent of this criterion is to exclude patients with high risk for bleeding or clotting complications. As such, patients who are taking oral anticoagulants (blood thinners) including, but not limited to, Xarelto® (rivaroxaban) or Eliquis® (apixaban) should also be excluded from the study. Patients may receive anticoagulation therapy any time after the study AV graft implant procedure, at their physician's discretion. This should be driven by an indication unrelated to the vascular access.
  • Subject has had a previous instance of Heparin Induced Thrombocytopenia type 2 (HIT-2) or has known sensitivity to heparin.
  • Subject has co-morbid conditions that may limit their ability to comply with study and follow-up requirements.
Show all 14Show fewer
  • The patient has had >2 previous arteriovenous accesses in treatment arm.
  • Subject is currently taking Aggrenox®.
  • Subject is in need of, or is scheduled for any major surgery within 30 days of the study procedure.
  • Subject is currently taking maintenance immunosuppressant medication such as rapamycin, mycophenolate or mycophenolic acid, prednisone (>10 mg), cyclosporine, tacrolimus or cyclophosphamide.
  • Life expectancy is less than 12 months.
  • Subject is pregnant. NOTE: A negative urine pregnancy test within 24 hours of the study procedure is required in all female subjects with reproductive capacity.
  • Subject is a poor compliance risk (i.e. history of IV or oral drug abuse).
  • The subject is enrolled in another dialysis or vascular investigational study.

Trial locations and contacts

10 sites in 1 country.

10 sites in 1 country

United States10 sites
  • Cartersville Medical Center, LLC

    Cartersville, Georgia, 30120

  • Medical University of South Carolina

    Charleston, South Carolina, 29425

  • Surgical Specialists of Charlotte

    Charlotte, North Carolina, 28207

  • Henry Ford Health System- Dept of Surgery

    Detroit, Michigan, 48202

  • Triad of Alabama/Flowers Hospital

    Dothan, Alabama, 36305

  • McLeod Physician Associates II

    Florence, South Carolina, 29506

  • Medical Center of Central Georgia - Navicent Health

    Macon, Georgia, 31201

  • Regional Medical Center of Orangeburg and Calhoun Counties

    Orangeburg, South Carolina, 29118-1498

  • Spartanburg Regional Medical Center

    Spartanburg, South Carolina, 29303

  • Saint Louis University

    St Louis, Missouri, 63103

Other trials in United States

About this study

Official title: Clinical Evaluation of a Vascular Venous Anastomotic Connector for Minimally Invasive Connection of an Arteriovenous Graft for Hemodialysis [InterGraft VIG-only Study]

The InterGraft™ Venous Anastomotic Connector provides an endovascular, minimally invasive means for attachment of an arteriovenous graft to a vein in the upper extremity. The InterGraft™ Venous Anastomotic Connector facilitates creation of the arteriovenous graft connection to a vein in support of hemodialysis in subjects with End Stage Renal Disease. The InterGraft™ Venous Anastomotic Connector is used together with conventional suturing of the arterial anastomosis to facilitate creation of an arteriovenous graft in support of hemodialysis in subjects with End Stage Renal Disease.

Read the detailed description

The InterGraft™ Venous Anastomotic Connector (VIG) was developed for endovascular, minimally invasive venous anastomosis of a standard arteriovenous graft (AVG) for hemodialysis. This study will evaluate the safety and performance of the VIG for anastomosis of a commercially available, 6 mm diameter, synthetic AVG. Anastomoses with the VIG may potentially reduce venous vessel trauma, improve the local vessel wall shear stresses and promote laminar flow, thereby improving patency.

While recognizing that a native fistula is the recommended access for hemodialysis, AVGs remain a frequently used access type. This study focuses on subjects who have a failed fistula, cannot have a fistula or are better suited for an AVG, as determined by the physician. The implant procedural outcomes, the number and type of major adverse events, and patency throughout a six-month follow-up period will be evaluated. The six-month patency rate will be compared with a pre-specified patency performance goal drawn from surgical AVG literature and published performance standards.

This is a pivotal, multicenter, prospective, non-randomized design study. All enrolled subjects will receive the VIG device and will have a standard sutured arterial anastomosis.

A total of 158 evaluable subjects will be enrolled, defined as primary analysis population of 146 subjects plus allowance for 12 subjects lost-to-follow up.

The study includes10 participating clinical centers. Study site investigators are physicians skilled in AVG placement and interventional techniques. Study data will be collected up to the point at which each subject has completed the six-month endpoint or experienced a terminal study endpoint.

The study will be conducted in compliance with the Investigational Plan, Investigational Device Exemption regulations, Good Clinical Practice guidelines, and other applicable regulatory requirements.

Being tested
Venous InterGraft Connector, sutured arterial anastomosis of an implanted vascular graft for hemodialysis, hemodialysis
Medical subject headings
Kidney Failure, Chronic

What participants receive

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

  • Venous InterGraft ConnectorDevice

    Also called VIG

    The device is designed for transcatheter delivery within a vein and connection to an AVG that has been tunneled under the skin in a standard manner. The connection is made via a small skin incision.

  • sutured arterial anastomosis of an implanted vascular graft for hemodialysisProcedure or surgery

    The arterial anastomosis of the implanted vascular graft for hemodialysis is formed using standard suturing technique.

  • hemodialysisProcedure or surgery

    The implanted vascular graft is intended as a vascular access for performing hemodialysis treatments.

Study groups in NCT02532621
Study groupRoleWhat they receive
Venous InterGraft Connector (VIG)ExperimentalThis is a nonrandomized, single-arm study: All enrolled patients are assigned to the same treatment: AVG implantation using a VIG (study device) to create the venous anastomosis and standard suturing to create the arterial anastomosis of the implanted AVG.
Receives: Device: Venous InterGraft Connector; Procedure: sutured arterial anastomosis of an implanted vascular graft for hemodialysis; Procedure: hemodialysis

What is being measured

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

  1. Cumulative Patency at 6 Months

    Percentage of subjects free from loss of access of the study graft for hemodialysis

    Measured: Six months of clinical follow-up following treatment assignment (enrollment)

Secondary outcomes (5)
  1. Acute Device Success

    AV graft flow at end of implant procedure

    Measured: 24 hours

  2. Primary Unassisted Patency

    Percentage of subjects free from the occurrence of either access thrombosis or an access procedure performed to maintain access patency

    Measured: Six months

  3. Time to First Cannulation

    Time from initial access placement to first graft cannulation for hemodialysis

    Measured: Six months

  4. Interventions Required to Maintain Patency

    Number of interventions required to maintain secondary patency

    Measured: Six months

  5. Serious Adverse Events (Secondary Endpoint Defined SAEs)

    Number and type of serious adverse events- death, emergent surgery, significant bleeding,graft infection, pseudoaneurysm

    Measured: Six months

Timeline

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

  1. First posted26 Aug 2015 (estimated)
  2. Study start21 Feb 2018
  3. Primary completion19 Jan 2022
  4. Study completion19 Jan 2022

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
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrolment
158 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT02532621
Sponsor's protocol ID
Venous Anastomotic Connector
Status last verified
Jan 2025
First submitted
19 Aug 2015
Last updated
6 Feb 2025
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
Yes
Individual data sharing
No

Publications

  • U.S. Renal Data System. USRDS 2011 Annual Data Report: Volume 2. Atlas of End Stage Renal Disease in the United States. Bethesda, MD, National Institutes of Health, National Institutes of Diabetes, and Digestive and Kidney Diseases; 2011

  • Dember LM, Beck GJ, Allon M, Delmez JA, Dixon BS, Greenberg A, Himmelfarb J, Vazquez MA, Gassman JJ, Greene T, Radeva MK, Braden GL, Ikizler TA, Rocco MV, Davidson IJ, Kaufman JS, Meyers CM, Kusek JW, Feldman HI; Dialysis Access Consortium Study Group. Effect of clopidogrel on early failure of arteriovenous fistulas for hemodialysis: a randomized controlled trial. JAMA. 2008 May 14;299(18):2164-71. doi: 10.1001/jama.299.18.2164.

    PubMed 18477783
  • Akoh JA. Prosthetic arteriovenous grafts for hemodialysis. J Vasc Access. 2009 Jul-Sep;10(3):137-47. doi: 10.1177/112972980901000301.

    PubMed 19670164
  • Roy-Chaudhury P, Kelly BS, Zhang J, Narayana A, Desai P, Melham M, Duncan H, Heffelfinger SC. Hemodialysis vascular access dysfunction: from pathophysiology to novel therapies. Blood Purif. 2003;21(1):99-110. doi: 10.1159/000067863.

    PubMed 12596755
  • Lee T, Roy-Chaudhury P. Advances and new frontiers in the pathophysiology of venous neointimal hyperplasia and dialysis access stenosis. Adv Chronic Kidney Dis. 2009 Sep;16(5):329-38. doi: 10.1053/j.ackd.2009.06.009.

    PubMed 19695501
  • Lok CE, Allon M, Moist L, Oliver MJ, Shah H, Zimmerman D. Risk equation determining unsuccessful cannulation events and failure to maturation in arteriovenous fistulas (REDUCE FTM I). J Am Soc Nephrol. 2006 Nov;17(11):3204-12. doi: 10.1681/ASN.2006030190. Epub 2006 Sep 20.

    PubMed 16988062
  • Lee HW, Allon M. When should a patient receive an arteriovenous graft rather than a fistula? Semin Dial. 2013 Jan-Feb;26(1):6-10. doi: 10.1111/sdi.12040. Epub 2012 Nov 22.

    PubMed 23173947
  • Saran R, Robinson B, Abbott KC, Agodoa LY, Albertus P, Ayanian J, Balkrishnan R, Bragg-Gresham J, Cao J, Chen JL, Cope E, Dharmarajan S, Dietrich X, Eckard A, Eggers PW, Gaber C, Gillen D, Gipson D, Gu H, Hailpern SM, Hall YN, Han Y, He K, Hebert H, Helmuth M, Herman W, Heung M, Hutton D, Jacobsen SJ, Ji N, Jin Y, Kalantar-Zadeh K, Kapke A, Katz R, Kovesdy CP, Kurtz V, Lavalee D, Li Y, Lu Y, McCullough K, Molnar MZ, Montez-Rath M, Morgenstern H, Mu Q, Mukhopadhyay P, Nallamothu B, Nguyen DV, Norris KC, O'Hare AM, Obi Y, Pearson J, Pisoni R, Plattner B, Port FK, Potukuchi P, Rao P, Ratkowiak K, Ravel V, Ray D, Rhee CM, Schaubel DE, Selewski DT, Shaw S, Shi J, Shieu M, Sim JJ, Song P, Soohoo M, Steffick D, Streja E, Tamura MK, Tentori F, Tilea A, Tong L, Turf M, Wang D, Wang M, Woodside K, Wyncott A, Xin X, Zang W, Zepel L, Zhang S, Zho H, Hirth RA, Shahinian V. US Renal Data System 2016 Annual Data Report: Epidemiology of Kidney Disease in the United States. Am J Kidney Dis. 2017 Mar;69(3 Suppl 1):A7-A8. doi: 10.1053/j.ajkd.2016.12.004. No abstract available.

    PubMed 28236831
  • Burgess JS, Beaver JD, London M, Rohan V, Orland P, Yevzlin A, Setum C, Ross J; InterGraft Study Investigators. Prospective multicenter study of a novel endovascular venous anastomotic procedure and device for implantation of an arteriovenous graft for hemodialysis. J Vasc Access. 2024 Jul;25(4):1244-1251. doi: 10.1177/11297298231159691. Epub 2023 Mar 9.

    PubMed 36895157

Questions about this trial

What is this clinical trial studying?

A study testing Venous InterGraft Connector, sutured arterial anastomosis of an implanted vascular graft for hemodialysis and hemodialysis in people with End Stage Renal Disease, run by Phraxis, Inc. at 10 sites in United States.

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 8 inclusion and 14 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: finished, as of the sponsor's last update on 6 Feb 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 10 sites in United States. 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?

Yes. Results are posted in the registry (first posted 1 Jan 2025). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

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

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Cumulative Patency at 6 Months (time frame: Six months of clinical follow-up following treatment assignment (enrollment)). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT02532621, which also lists 9 linked publications.

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 6 Feb 2025.

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