Clinical trial NCT05448950: Continued Access Study VIG Anastomotic Connector
Official title: Continued Access Study of the InterGraft™ Venous Anastomotic Connector for Minimally Invasive Connection of an Arteriovenous Graft for Hemodialysis
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Dialysis Access Malfunction
Lead sponsor: Phraxis, Inc.
Sponsor class: INDUSTRY
First posted: 2022-07-08
Enrollment: 12
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NA
Intervention model: SINGLE_GROUP
Primary purpose: TREATMENT

Brief summary: The continued access study of the InterGraft Venous Anastomotic Connector (Venous InterGraft Continued Access Study, or 'VIG-CAS') allows for continued enrollment of subjects while the marketing application is being prepared and subsequently reviewed by FDA. The VIG-CAS will include the same patient population, follow-up schedule, and study endpoints as the VIG pivotal study.

Detailed description: The VIG-CAS is a multicenter, prospective, single-arm study that will include up to 15 subjects contributed from up to 5 study sites that previously participated in the VIG pivotal study. No new investigators will be included. All subjects will be assigned to treatment with the VIG and a standard sutured arterial anastomosis for implantation of an arteriovenous graft (AVG) for hemodialysis. The selection criteria (patient population), follow-up schedule, and study endpoints are the same as those used in the pivotal study.

Study data will be collected up to the point at which each subject has completed the final 6-month follow up or experienced a terminal study event.

Eligibility criteria: Inclusion Criteria:

1. Subject is ≥ 18 years of age.
2. Subject requires the creation of a vascular access graft for hemodialysis, secondary to a diagnosis of End Stage Renal Disease.
3. Subject has the vascular access graft placed in an upper extremity.
4. 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.
5. Subject has a reasonable expectation of remaining on hemodialysis for at least 6 months.
6. Subject or his/her legal guardian understands the study and is willing and able to comply with the dialysis schedule and follow-up requirements.
7. Subject or his/her legal guardian provides written informed consent. NOTE: In accordance with the requirements of some Institutional Review Boards (IRBs), where applicable, only those subjects with capacity to consent for themselves will be included. Thus, where required by the IRB, adult individuals who lack capacity to consent for themselves will be excluded from the study.
8. 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™ Venous Connector or create a sutured arterial anastomosis.

Exclusion Criteria:

1. Subject has a documented and unsuccessfully treated ipsilateral central venous stenosis as determined by imaging.
2. Subject currently has a known or suspected bacterial, fungal, or HIV infection. NOTE: Subjects with hepatitis B or C may be included in the study.
3. 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. Patients who are taking the oral anticoagulant Eliquis® (apixaban) may be included in the study if Eliquis is temporarily discontinued prior to the study procedure, in accordance with the approved prescribing instructions. 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.
4. Subject has had a previous instance of Heparin Induced Thrombocytopenia type 2 (HIT-2) or has known sensitivity to heparin.
5. Subject has co-morbid conditions that may limit their ability to comply with study and follow-up requirements.
6. Subject has had \>2 previous arteriovenous accesses in treatment arm.
7. Subject is currently taking Aggrenox®.
8. Subject needs or is scheduled for any major surgery within 30 days of the study procedure.
9. Subject is currently taking maintenance immunosuppressant medication such as rapamycin, mycophenolate or mycophenolic acid, prednisone (\>10 mg), cyclosporine, tacrolimus, or cyclophosphamide.
10. Life expectancy is less than 12 months.
11. 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.
12. Subject is a poor compliance risk (i.e.. history of IV or oral drug abuse).
13. Subject is enrolled in another dialysis or vascular investigational study.

Primary outcomes:
measure: Cumulative Patency
timeFrame: 6 months
Secondary outcomes:
measure: Acute Device Success
timeFrame: At implant
measure: Primary Unassisted Patency
timeFrame: 6 months
measure: Time to First Cannulation
timeFrame: 6 months
measure: Interventions Required to Maintain Secondary Patency
timeFrame: 6 months or up to time of early exit from the study, whichever occurs first.
measure: Protocol-defined Serious Adverse Events (SAEs)
timeFrame: 6 months or up to time of early exit from the study, whichever occurs first.
Other outcomes:
Locations:
city: Dothan
country: United States
facility: Trinity Research Group, LLC
state: Alabama
city: Charlotte
country: United States
facility: Surgical Specialists of Charlotte
state: North Carolina
Study officials:
affiliation: VP of Clinical Affairs
name: Cindy Setum, PhD
role: STUDY_DIRECTOR
References:
citation: Ebner A, Ross JR, Setum CM, Kallok MJ, Yevzlin AS. Transcatheter anastomosis connector system for vascular access graft placement: results from a first-in-human pilot study. J Vasc Access. 2016 Mar-Apr;17(2):111-7. doi: 10.5301/jva.5000481. Epub 2015 Oct 7.
citation: 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.