Southern Arizona’s ‘First of its Kind’ Surgery Performed This Week

TUCSON, Ariz. – (Dec. 1, 2010) – Carondelet St. Mary’s Hospital was the site of an impressive new form of knee replacement surgery this week. The first total knee replacement using the most sophisticated imaging and computer-aided 3D technology took place November 30. This computer-aided 3D technology results in a more precise fit for the knee implant.

Edward Petrow Jr., D.O., of the Tucson Orthopaedic Institute performed the TruMatch Solutions supported total knee replacement surgery at Carondelet St. Mary’s. TruMatch Solutions are customized surgical guides created from a patient’s unique anatomy to achieve the best placement of the knee implant.

"The key factor in successful total knee replacement is precision," says Edward Petrow, Jr., D.O., orthopaedic surgeon at Tucson Orthopaedic Institute. "Custom fit knee replacement gives us an edge by allowing us to make very accurate cuts using advanced imagery of a patient’s anatomy. Quicker, more accurate, surgery should result in faster recovery, less pain, fewer complications and a longer-lasting result."

“St. Mary’s is proud to host the area’s first total knee replacement of this kind,” said Amy Beiter, M.D. Chief Medical Officer at Carondelet St. Mary’s Hospital. “As Arizona’s first hospital, it is exciting that we continue to offer innovative “firsts” to our community.”

Fast Facts:
  • Knee replacement surgery is one of the most common joint replacement procedures.
  • With baby boomers maintaining a more active lifestyle as they age, knee replacement surgeries are becoming more common.
  • TruMatch Solutions utilizes CT technology to create detailed 3D image of the bone, allowing more precise mechanical alignment of the knee that that of traditional MRI scans.
Here’s how the technology works: First a CT scan is taken of the leg, from hip to ankle. The image is sent to the manufacturer where a team develops a computerized 3D model of the knee. Upon approval by the patient’s surgeon, customized instrumentation guides are created of the knee. Those guides are delivered to the surgeon to help precisely position the knee implant. In all, this reduces the number of surgical steps and assures proper implant placement. Visit for more information.

Dr. Edward Petrow, Carondelet St. Mary’s Hospital leaders and the patient are available for interviews. Flip video of the surgery is also available for media use. Please contact Jason Fenwick at or (520) 349-1845.

Carondelet Health Network, located in Tucson, Arizona, is a Catholic, nonprofit health care system dedicated to responding to the health care needs of Southern Arizonans. With a Mission to Heal, Carondelet was founded by the Sisters of St. Joseph of Carondelet 130 years ago. Carondelet Health Network facilities include Carondelet St. Mary's Hospital, Carondelet St. Joseph's Hospital, Carondelet Heart & Vascular Institute and Carondelet Neurological Institute on the campus of St. Joseph’s Hospital in Tucson and Carondelet Holy Cross Hospital in Nogales, Arizona. Other Carondelet services include seventeen Carondelet Medical Group primary care locations, three Carondelet Specialist Group offices, an ambulatory surgery center and various outpatient services. Carondelet Health Network is a ministry of Ascension Health, the nation's largest Catholic, non-profit health care system. In Fiscal Year 2010, Carondelet provided nearly $50 million (8.3 percent of its net revenue) in Community Benefit to improve the health of our community and increase access to health care. More information about Carondelet Health Network is available at