Tryton Post Approval Study (PAS) for the Tryton Side Branch Stent

Not Applicable

• Conditions: Coronary Artery Disease
• Interventions: Device: Coronary Artery Stenting

• Registration Number: NCT03318796
• Lead Sponsor: Tryton Medical, Inc.

Brief Summary

TRYTON Post Approval Study (PAS) of the Tryton Side Branch Stent

Detailed Description

The primary objective of this PAS is to assure the continued safety and effectiveness of the Tryton Side Branch Stent™ with main branch approved DES in the treatment of de novo native coronary artery bifurcation lesions with side branch diameter ranging from ≥2.5 mm to ≤3.5 mm and main branch diameter ranging from ≥2.5 mm to ≤4.0 mm.

Study Timeline

• Study First Submitted: 2017-10-02
• Study First Submitted QC: 2017-10-18
• Study First Posted: 2017-10-24
• Study Start: 2018-01-22
• Status Verified: 2019-02
• Last Update Submitted: 2019-02-22
• Last Update Posted: 2019-02-26
• Primary Completion: 2019-12-30
• Study Completion: 2022-12-30

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 335

Inclusion Criteria

General Inclusion Criteria

1. The patient must be ≥18 and ≤ 90 years of age;
2. Acceptable candidate for CABG;
3. The intention to treat the side branch of the target bifurcation based on angiographic evaluation
4. The patient is willing to comply with specified follow-up evaluations;
5. The patient or legally authorized representative has been informed of the nature of the study, agrees to its provisions and has been provided written informed consent, approved by the appropriate Institutional Review Board (IRB).
6. Planned use of FDA approved and commercially available drug-eluting stents (DES) for subject's index procedure Angiographic Inclusion Criteria
7. a) Single de novo lesion in a bifurcation involving both the main branch and the side branch b) The bifurcation: main branch and side branch with a visual diameter stenosis ≥ 50% (Medina classification 1.1.1; 0.1.1; 1.0.1) by visual assessment;
8. Target lesion located in a native coronary artery;
9. a) Bifurcation lesion main branch reference vessel diameter must be ≥2.5 mm to ≤ 4.0 mm, and b) Side branch reference vessel diameter must be ≥2.5mm by visual estimate (≥2.25mm by QCA) and <3.5 mm by visual estimate (<3.25 mm by QCA);
10. a) Bifurcation lesion main branch lesion length ≤ 28 mm and b) Side branch lesion length ≤ 5.0 mm (the ability to be treated with a single stent for both main and side branch);
11. Target lesion ≥50% and <100% stenosed by visual estimate in both the main branch and side branch; -

Exclusion Criteria

General Exclusion Criteria

1. Pregnant or nursing patients and those who plan pregnancy in the period up to 1 year following index procedure. Female patients of child-bearing potential must have a negative pregnancy test done within 7 days prior to the index procedure per site standard test;

2. Impaired renal function (serum creatinine >2. mg/dL or 150 μmol/l);

3. Platelet count <100,000 cells/mm3 or >700,000 cells/mm3 or a WBC <3,000 cells/mm3, or documented or suspected liver disease (including laboratory evidence of hepatitis);

4. Presence of a heart transplant

5. Known allergy to cobalt chromium

6. Hypersensitivity or contraindication to cobalt-chromium or structurally-related compounds, cobalt, chromium, nickel, or tungsten

7. Anticipated use of rotational artherectomy

8. Patient in whom the use of a drug eluting stent is contraindicted, e.g., who cannot receive the recommended dual anti-platelet (aspirin and an approved P2Y12 inhibitor) and/or anticoagulant therapy

   Angiographic Exclusion Criteria:

9. Left main coronary artery disease (protected and unprotected);

10. Trifurcation lesion;

11. Totally occluded target vessels (TIMI flow 0 or 1);

12. Moderate to Severely calcified target lesion(s);

13. Highly calcified target lesion(s) requiring rotational atherectomy;

14. Target lesion has excessive tortuosity unsuitable for stent delivery and deployment;

15. Angiographic evidence of thrombus in the target lesion(s);

16. Tryton Stent placement without angioplasty pre-dilatation of the main branch and side branch (i.e., direct stenting is contraindicated)

17. Tryton Stent placement alone, without implantation of a main branch stent

18. An untreated significant (>50%) stenosis proximal or distal in either the side branch or main branch;

19. Impaired runoff in the treatment vessel with diffuse distal disease;

20. Left ventricular ejection fraction (LVEF) 30% (LVEF must be obtained within 6 months prior to the index procedure); -

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Interventional	Coronary Artery Stenting	Coronary artery stenting of De novo bifurcation lesions MB \& SB

Primary Outcome Measures

Name	Time	Method
Target Vessel Failure (TVF)	1 year	Composite of cardiac death, target vessel MI (Q and non-Qwave) clinically driven target vessel revascularization

Secondary Outcome Measures

Name	Time	Method
Lesion success	48 hrs	Attainment of \<30% residual stenosis using any percutaneous method
Procedure success	48 hrs	Lesion success without the occurrence of in-hospital MACE
Death	1 year	All-cause and cardiac mortality
Myocardial infarction (MI)	1 year	Q wave and Non-Q wave
CD-TVR	1 year	Clinically driven target vessel revascularization
Stent thrombosis	1 year	ARC definition of definite and probable
Device success	48 hrs	Attainment of \<30% residual stenosis within the side branch without device malfunction
CD-TLR	1 year	Clinically driven target lesion revascularization

Trial Locations

Locations (1)

NC Heart and Vascular Research/UNC REX; 🇺🇸 Raleigh, North Carolina, United States