Biosensors Polymer/Carrier-Free Drug Stent U.S. Study Starts

Biosensors has announced enrollment of the initial patient in BioFreedom USA, an Investigational Device Exemption (IDE) Feasibility Trial designed to collect additional U.S.-based safety and effectiveness data for BioFreedom™, the company’s novel polymer and carrier-free drug-coated stent (DCS).


BioFreedom represents the latest development in Biosensors’ stent technology, featuring a micro-structured abluminal surface that permits the controlled release of Biolimus A9™ (BA9™) without the use of a polymer or other carrier. BA9 is a highly lipophilic anti-restenotic drug developed by Biosensors specifically for use with stents. In its First in Man (“FIM”) study, treatment with BioFreedom demonstrated excellent 12-month late lumen loss and sustained safety up to four years, including absence of definite and/or probable stent thrombosis.

Biosensors believes its BioFreedom USA study is the first clinical trial within the United States to evaluate a polymer-free DCS. Results from this study will support a future pivotal IDE study in the U.S.

The trial design is multicenter and prospective, enrolling up to 100 patients at up to ten centers. Due to the unique features of the BioFreedom DCS, the U.S. Food and Drug Administration (FDA) has approved a post-implant strategy requiring only three months of dual anti-platelet therapy (DAPT) for this trial. 

The BioFreedom US IDE Feasibility Trial is enrolling patients with symptomatic ischemic heart disease due to de novo native coronary artery lesions. The primary safety endpoint of the study is the occurrence of MACE (a composite of cardiac death, myocardial infarction, target lesion revascularization and definite stent thrombosis) within nine months following stent implantation. The primary efficacy endpoint is in-stent late lumen loss at nine months compared with a historical control.

Enrollment in this study is anticipated to last around four months from initial patient enrollment a first patient having already been treated by Dr Waksman.

Investigator comments 

“I am very excited to be involved in this first U.S. study of a drug-coated stent”, commented Principal Investigator Dr. Ron Waksman at the MedStar Washington Hospital Center, Washington DC. “This will hopefully prove to be the first step towards FDA approval of BioFreedom, offering U.S. patients all the benefits of a drug-eluting stent but with a shorter DAPT requirement”.

Source: Biosensors, Inc.


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