FDA Clears Antibacterial Pacemaker Envelope

Tyrx antimicrobial envelopeBack in April we covered the story of the first implantation of Tyrx Inc’s fully Resorbable AIGISRx® R Antibacterial Envelope for use with pacemakers and implantable cardioverter defibrillators (ICDs).

Now the company has announced that it has received U.S. FDA clearance to market the device.


Patients with surgical site infections (SSIs) following Cardiac Implantable Electronic Device (CIED) procedures reportedly spend an average of two extra weeks in hospital, undergo repeat surgical procedures to treat the infection, and cost the facility an average of $72,485. Additionally, such patients experience significant increases in morbidity and mortality, with 1-year mortality rates of 26.5 – 35.1%, and 3-year mortality of up to 50%, depending on device type.

AIGISRx R is a fully bioresorbable, antibacterial mesh envelope, intended to hold  CIEDs securely in place in order to provide a stable environment when implanted in the body. Key to its design, AIGISRx R contains the antimicrobial agents rifampin and minocycline, which are released locally into the tissue, to help reduce SSIs associated with CIED implantation. Multiple studies have shown that in patients at high-risk for device infection, CIED implantation with the AIGISRx Antibacterial Envelope significantly reduced device infections by 70% – 100%, compared to patients who did not receive the AIGISRx.

Physician comments

“Over the last couple of decades, the number of cardiac device infections has risen sharply and out of proportion to the number of device implantations. With more than 500,000 CIED implantations annually in the U.S., it is imperative that infections associated with these types of procedures are avoided to save lives and money,” according to electrophysiologist Dr. Charles Love, Professor of Medicine and the Director of Cardiac Rhythm Device Services for the Division of Cardiovascular Medicine at The Ohio State University Wexner Medical Center. “The AIGISRx R provides physicians with a key technology to prevent surgical site infections following CIED implantation.”

Company comments

“The AIGISRx R represents the next generation of TYRX’s Antibacterial Envelope technology, providing all of the advantages of the original AIGISRx, such as device stabilization and infection reduction, but now with the added benefit of being fully resorbable,” commented Robert White, TYRX President and Chief Executive Officer. “Without question, FDA-clearance is a major milestone for TYRX and cements our leadership in the effort to reduce surgical site infections following CIED implantation. Our mission is to make the AIGISRx R a standard-of-care for all high-risk CIED surgeries where patients are especially vulnerable to the dire effects of an infection.”

Source: Tyrx, Inc., Business Wire