Executive Leadership

Luis F. Angel, Luis Angel, M.D.MD
President and Chief Medical Officer

Dr. Angel is BiO2 Medical’s President and Chief Medical Officer and will be responsible for implementing the scientific agenda for the company. Dr. Angel is an Associate Professor of Pulmonary and Critical Care Medicine, Director of Lung Transplantation, and Director of Interventional Pulmonary Medicine at the University of Texas Health Science Center at San Antonio.

During Dr. Angel’s fellowship in interventional pulmonology at Harvard Medical School, he developed a stent delivery device that was eventually commercialized by Merit Medical and is currently sold in the United States and Europe as the Aero Direct Visualization Delivery System. Dr. Angel then developed the Angel® Catheter with the goal of preventing PEs in critically ill patients.



Christopher E. BanasChristopher E. Banas
Chief Executive Officer, Chairman of the Board

BiO2 Medical’s Chairman and Chief Executive Officer, Christopher E. Banas, is a medical device industry veteran with extensive, directly applicable leadership experience in cardiovascular company startup, financing, management, R&D, scale-up, regulatory approval, and commercialization.

Mr. Banas has co-founded four medical device companies, Advanced Bio Prosthetic Surfaces, Ltd. (ABPS), CardioSpectra, Inc., Aeon BioScience Inc., and BiO2 Medical, Inc., all in the cardiovascular space. ABPS and CardioSpectra successfully developed their respective products, demonstrated feasibility, and were sold to major, US based medical device companies. Aeon BioScience is currently developing an elastin-based biomaterial to be used either as a coating for medical devices to improve their biological properties, or as a stand-alone material, such as a small diameter vascular graft to be used as a bypass graft.

CardioSpectra, developed an Optical Coherence Tomography (OCT) imaging catheter, console, and interface device for the high resolution imaging of coronary and peripheral arteries. Banas and his team raised the capital, developed the products, and conducted all relevant in-vitro, and in-vivo testing to gain a CE Mark. CardioSpectra was then sold to Volcano Corporation, a publically held medical device company, where Banas assumed the role of President and General Manager for their new OCT division.

Prior to CardioSpectra, Mr. Banas co-founded Advanced Bio Prosthetic Surfaces, Ltd. (ABPS) with Dr. Julio Palmaz, the inventor of the balloon expandable Palmaz® stent. Under Mr. Banas’ leadership as President and CEO, he raised the capital and developed an entirely new method for making Nitinol implantable cardiovascular devices utilizing physical vapor deposition. Banas and his team developed the technology, demonstrated feasibility through numerous bench and animal testing, conducted a First in Man (FIM) human clinical trial, and then sold the exclusive license to practice the technology to Cordis, a Johnson and Johnson company.

Mr. Banas holds 60 issued US patents and currently has 64 published US applications in the fields of cardiovascular medicine, specifically, vascular surgery, interventional cardiology, nanotechnology and physical vapor deposition of NITINOL. 



margarettumasMargaret W. Tumas, DVM
Vice President of Clinical Affairs

Dr. Tumas is a seasoned leader in the medical device arena.  After practicing veterinary medicine and surgery for 8 years, she has held positions in both large, (including Medtronic and Boston Scientific) and small medical technology companies over the past 16 years.  Her areas of responsibility in the scientific realm have ranged from pre-clinical research to clinical research, medical affairs and medical marketing. Among others, Dr. Tumas has managed programs focused in critical care, cardiovascular, peripheral vascular, neurovascular and spinal orthopedics.

Dr. Tumas has led research teams focused on both technology development as well as post-market research.  She has managed external research programs under rigorous compliance oversight.  Dr. Tumas has also developed clinical marketing strategies and delivered presentations for medical conferences in a number of therapeutic areas.

Dr. Tumas is passionate about exceeding the needs of her customers – both internal and external. She enjoys combining science and technology with customer communication, and understands the value of clear communication, flawless execution and project completion.



patrickhowePatrick Howe
Vice President of Sales & Marketing

Patrick Howe is the Vice President of Sales & Marketing, responsible for the commercialization of BiO2 Medical’s Angel® Catheter. Mr. Howe’s priorities are the establishment of a Sales and Marketing distribution network throughout North America, Latin America, Europe, the Middle East, and Asia.

Mr. Howe has a combined 26 years of experience in various Clinical, Sales, and Marketing roles focusing on Critical Care and Vascular Medicine. Prior to his roles in Marketing, Mr. Howe worked as an RN/Physician Extender in Interventional Radiology at the Mayo Clinic in Rochester, MN.

Throughout his career Mr. Howe has been responsible for several U.S. and global, vascular product launches to include: a retrievable IVC Filter, vascular thrombectomy device, and dialysis catheters.  In addition, Mr. Howe has managed several vascular product lines at varying stages of their product life cycle, all the while supporting sales to meet the organizations financial objectives.



gonzalesSilbiano V. Gonzales
Vice President of Operations

Silbiano Gonzales, a Texas A&M University graduate, is BiO2 Medical’s Vice President of Operations. Currently, his responsibilities include the day-to-day operations of BiO2 Medical.

Mr. Gonzales possesses over 18 years’ experience in the medical device industry.  His past roles include positions in Operations, Regulatory Affairs, Clinical Affairs, Quality Assurance and Manufacturing.  Mr. Gonzales’ vast knowledge of medical device regulation in the United States, European Union, and South America has established him as a respected leader, able to execute company goals and objectives while maintaining product quality and integrity.

For over twelve years, Mr. Gonzales resided in San Antonio, Texas, where he was employed in various capacities with the same core group of individuals at BiO2 Medical.  He gained valuable insight and experience in the medical device industry at Advanced Bio Prosthetic Surfaces, Ltd. and CardioSpectra, Inc. which has directly contributed to the recent accomplishments of BiO2 Medical, Inc.



jeffsteinmetzJeff Steinmetz
Vice President of Research & Development

Jeff Steinmetz is the Vice President of Research and Development for BiO2 Medical, Inc.  He has over 10 years of medical device experience.

After receiving his B.S. in Mechanical Engineering from the University of Portland, he began his medical device career with Chris Banas at Advanced Bio Prosthetic Surfaces, Ltd. (ABPS), as a R&D Project Engineer. He was responsible for the design, prototyping and characterization of Class III Nitinol medical devices.

His design experience includes coronary stents, surgical grafts, AAA stent grafts, heart valves, venous valves, septal occluders, embolic protection devices, vena cava filters, and catheter based delivery systems. Since he joined BiO2 Medical in 2007, Jeff has continued to apply his creativity and management to the development of the Angel® Catheter and future product roadmap.



joepercyJoseph P. Piercy
Secretary & Comptroller

Joseph Piercy serves as the Comptroller and Secretary of BiO2 Medical, Inc. His duties include overseeing the day-to-day financial and corporate affairs of the company.

Mr. Piercy has been continuously employed with the same core group of individuals since 1999, through two previously successful startup companies, Advanced Bio Prosthetic Services Ltd. (ABPS) and CardioSpectra, Inc. During these years, Mr. Piercy has served in various engineering and management capacities.