AtheroMed is closing in on a $4.5 million fundraising round, offering debt and options offering, SEC documents show.

The Menlo Park, Calif.-based medical device company has so far raised $4.3 million for its operations, according to a regulatory filing.

AtheroMed is the developer of the Phoenix atherectomy system, a peripheral atherectomy catheter designed for treatments below the knee disease.

AtheroMed is still flying under the radar, to judge by the 1-page website, which provides only an email link to contact the company.