EXTEND: Thoraflex Hybrid and Relay Extension Post-Approval Study

Sponsor

Vascutek Ltd. (Industry)

Overall Status

Not yet recruiting

CT.gov ID

NCT05639400

Collaborator

Bolton Medical (Industry)

200

Enrollment

Location

168

Anticipated Duration (Months)

1.2

Patients Per Site Per Month

Study Details

Study Description

Brief Summary

The goal of this observational study is to evaluate the Thoraflex Hybrid device alone and in combination with the RelayPro NBS stent-graft in the treatment of aortic disease affecting the aortic arch and descending aorta with or without involvement of the ascending aorta.

Patients who undergo treatment with the Thoraflex Hybrid device with or without extension with a RelayPro NBS stent-graft will be eligible for enrolment and study activities and follow-up regime will follow standard care at each participating site.

Participant involvement in the study will last for a total of 10 years from the point at which the Thoraflex Hybrid device is placed.

Condition or Disease	Intervention/Treatment	Phase
Thoracic Diseases Aortic Aneurysm Aortic Dissection Thoracic Aortic Aneurysm Thoracic Aortic Dissection	Device: Thoraflex Hybrid Device: RelayPro NBS

Study Design

Study Type:

Observational

Anticipated Enrollment :

200 participants

Observational Model:

Cohort

Time Perspective:

Prospective

Official Title:

Thoraflex Hybrid and Relay Extension Post-Approval Study

Anticipated Study Start Date :

Dec 1, 2022

Anticipated Primary Completion Date :

Dec 1, 2035

Anticipated Study Completion Date :

Dec 1, 2036

Outcome Measures

Primary Outcome Measures

Primary Safety Endpoint is a composite of the following: [The primary safety endpoint will be measured at one-year after the index procedure and again at least 8 months after the (first) extension procedure.]
Permanent disabling stroke (mRS >2 and an increase in at least one mRS category from the individual's pre-stroke baseline, occurring within 30 days of either index procedure or extension and present at 1-year follow-up)* Note: If a subject dies prior to 1-year follow-up, their last recorded mRS will be considered their final score Grade 3 spinal cord ischemia (SVS reporting standards) occurring within 30 days of either index procedure or extension All-cause mortality (within 1 year of either procedure) (*Per VARC-3, disability assessment using the mRS should be performed between 30 and 90 days after a neurological event with 90 days being optimal. An increased mRS score by itself and in the absence of a neurological event does not constitute stroke.)
Primary Safety Endpoint is a composite of the following: [The primary safety endpoint will be measured again at least 8 months after the (first) extension procedure.]
Permanent disabling stroke (mRS >2 and an increase in at least one mRS category from the individual's pre-stroke baseline, occurring within 30 days of either index procedure or extension and present at 1-year follow-up)* Grade 3 spinal cord ischemia (SVS reporting standards) occurring within 30 days of either index procedure or extension All-cause mortality (within 1 year of either procedure) (*Per VARC-3, disability assessment using the mRS should be performed between 30 and 90 days after a neurological event with 90 days being optimal. An increased mRS score by itself and in the absence of a neurological event does not constitute stroke.)
Primary Effectiveness Endpoint: Treatment Success [The primary effectiveness endpoint will be measured at one-year after the index procedure.]
Defined as device technical success (of either procedure) with absence of the following at 1-year: Lesion-related mortality (defined as all deaths occurring within 30 days of, or, prior to discharge, from either the index procedure or the extension procedure or any revision procedures to treat the original lesion(s) and any other deaths adjudicated by Clinical Events Committee as related or probably related to the lesion(s)) Aortic rupture in the treated segment Lesion expansion (≥5mm increase from measurement at discharge/within 30 days) Secondary intervention to address the following: Stent graft-induced aortic wall injury (SAWI) Fistula Type I or III endoleak (see definitions) Migration Loss of Patency Thromboembolic events Failure of integrity
Primary Effectiveness Endpoint: Treatment Success [The primary effectiveness endpoint will be measured again at least 8 months after the (first) extension procedure.]
Defined as device technical success (of either procedure) with absence of the following at 1-year: Lesion-related mortality (defined as all deaths occurring within 30 days of, or, prior to discharge, from either the index procedure or the extension procedure or any revision procedures to treat the original lesion(s) and any other deaths adjudicated by Clinical Events Committee as related or probably related to the lesion(s)) Aortic rupture in the treated segment Lesion expansion (≥5mm increase from measurement at discharge/within 30 days) Secondary intervention to address the following: Stent graft-induced aortic wall injury (SAWI) Fistula Type I or III endoleak Migration Loss of Patency Thromboembolic events Failure of integrity

Secondary Outcome Measures

Secondary Safety Endpoints, Absence of the following [The secondary endpoints will be measured at each follow-up timepoint from discharge/30 days through to 10 years.]
All-cause mortality, and Lesion-related mortality (defined as all deaths occurring within 30 days of, or, prior to discharge, from either the index procedure or the extension procedure or any revision procedures to treat the original lesion(s) and any other deaths adjudicated by Clinical Events Committee as related or probably related to the lesion(s)) All/any paraplegia/paraparesis defined as SCI (SVS grades 1 to 3) Any stroke (excluding TIA) Incidence of Myocardial Infarction Incidence of Respiratory Failure Incidence of Renal Failure Incidence of Bowel Ischemia
Secondary effectiveness endpoints will be reported [The secondary endpoints will be measured at each follow-up timepoint from discharge/30 days through to 10 years.]
Any aortic rupture (treated and untreated segments) Aortic remodeling in the treated segment(s) New dissections Proximal and distal extension of dissections Any false lumen perfusion (specifying location and if intentional or not) Fistula formation All endoleaks Device migration (measure both >5mm from position at discharge/within 30 days, and >10 mm from position at discharge/within 30 days, and requiring secondary intervention) Device integrity issues (e.g., stent fracture) All thromboembolic events Pseudoaneurysms (device-related) Secondary Interventions Graft patency (loss of patency will be defined as an opening of <50% due to, for example, occlusion, stenosis, kinking)

Eligibility Criteria

Criteria

Ages Eligible for Study:

18 Years and Older

Sexes Eligible for Study:

All

Inclusion Criteria:

Patient is aged 18 years or older on date of consent. Patient is willing and able to comply with all study procedures and visits. Patient or their next of kin (NOK)/legally designated representative (LDR) has given written informed consent to participate in the study.

Patient will undergo treatment with a Thoraflex Hybrid device. If a patient requires an extension procedure due to the extent of aortic disease, a RelayPro NBS Stent-graft should be placed inside the distal end of the previously placed Thoraflex Hybrid device via a retrograde approach. This may be part of the same or a two-stage procedure.

Exclusion Criteria:

Patient has any medical, social, or psychological problems that in the opinion of the investigator preclude them from receiving this treatment and the procedures and evaluations pre and post procedure.