NCT07380490

Comparing Two PFO Closure Devices in Adults With Previous Stroke or TIA

Randomised Controlled Trial Comparing the Safety and EfficAcy of the Cocoon PFO Occluder Versus Amplatzer PFO ClosurE Device for Percutaneous Closure of Patent Foramen Ovale in Patients With a History of Stroke or Transient Ischemic Attack A Non-Profit, Single-blind, Investigator Driven Trial

• Status: Not Yet Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 1,260 (estimated)
• Sponsor: Giuseppe Tarantini · Industry
• Sex: All
• Age: 18 Years – 65 Years
• Healthy volunteers: Not accepted

Summary

This study is a prospective, multicenter, randomized, controlled, single-blind, investigator-driven, non-profit clinical trial designed to compare the safety and efficacy of the Cocoon PFO Occluder with the Amplatzer PFO Occluder family in patients requiring percutaneous closure of a patent foramen ovale (PFO). Eligible participants are adults with a history of cryptogenic embolic stroke or neurologically confirmed transient ischemic attack (TIA) within the previous 12 months and a PFO suitable for transcatheter closure. A total of up to 1260 subjects will be enrolled across multiple European centers. Participants will be randomly assigned in a 3:1 ratio to receive either the Cocoon PFO Occluder (experimental group) or an Amplatzer PFO closure device (control group). The procedure will be performed as soon as possible after randomization, preferably within 14 days and no later than 45 days. The primary endpoint is a non-inferiority comparison of a composite outcome at 12 months, including recurrent ischemic stroke, TIA, or all-cause death. Secondary endpoints include PFO closure rate at 6 months, assessed by echocardiographic imaging, and other measures of safety, device performance, and clinical outcomes. The study is conducted in a single-blind fashion: patients will not be informed of the device they receive unless they explicitly request this information. Any patient who chooses to be unblinded will continue to participate without affecting eligibility or follow-up, and the date of unblinding will be documented to allow appropriate sensitivity analyses. This trial aims to provide robust comparative evidence on the clinical performance of the Cocoon PFO Occluder relative to the Amplatzer PFO Occluder to guide optimal device selection in patients with cryptogenic stroke or TIA associated with PFO.

Conditions

• Patent Foramen Ovale
• Stroke
• Transient Ischemic Attack (TIA)

Interventions

Type	Name	Description
DEVICE	PFO Closure procedure	Percutaneous PFO closure performed according to standard clinical practice. The procedure is scheduled within 45 days after randomization and includes initiation of dual antiplatelet therapy before the intervention. Closure is performed following the Instructions for Use (IFU) of the assigned device and is guided by intracardiac echocardiography or transesophageal echocardiography. After device implantation, patients undergo routine post-procedure assessment and are instructed to follow antiplatelet therapy consistent with European clinical practice guidelines. Endocarditis prophylaxis is recommended for six months. The procedural steps are identical for both study arms; the only difference is the device implanted (Cocoon PFO Occluder or Amplatzer PFO Occluder). Participants are assigned to the two study arms using a 3:1 randomization scheme (Cocoon PFO Occluder : Amplatzer PFO Occluder).

Timeline

• Start date: 2026-04-01
• Primary completion: 2028-04-01
• Completion: 2028-04-01
• First posted: 2026-02-02
• Last updated: 2026-03-24