Dr. Chow is a board-certified hip and knee specialist with dual-fellowship training in Adult Reconstruction and Arthroscopic Surgery. As an early adopter of technology in the operating room, Dr. Chow was among the very first surgeons in the world to use VERASENSE Sensor-Assisted Total Knee Arthroplasty (TKA) for Smith & Nephew’s LEGIONTM and JOURNEYTM II Knee Systems in late 2014. At the time, he believed he was providing excellent care but knew there may be room to improve his practices and to help address the fraction of patients who continue to be dissatisfied post-TKA. In order to quantify intra-op soft-tissue TKA balance, Dr. Chow added VERASENSE to his standard technique: a gap-balanced, tourniquet-less approach using cruciate-retaining (CR) components with VISIONAIRETM Patient Matched Technology.
After nearly 200 cases, Dr. Chow believes he has learned about performing a better total knee replacement through using VERASENSE. Referencing the real-time, intra-operative load data has allowed him to re-evaluate the importance of certain soft-tissue structures and has led to changes in his balancing algorithm for both varus and valgus knees. Additionally, Dr. Chow has seen how slight changes in elements of the procedure, such as cementing technique and adjustments as small as 1mm in poly thickness or bony resection, can have a significant impact on the overall joint balance.
“VERASENSE HAS TAUGHT ME TO BE A MORE THOUGHTFUL, PARTICULAR SURGEON. I HAVE RE-EVALUATED WHICH STRUCTURES ARE MAIN DRIVERS OF BALANCE AND STABILITY FOR VARIOUS PRESENTATIONS, AND I’VE DISCOVERED THERE ARE SMALL ELEMENTS OF THE PROCEDURE THAT CAN HAVE A BIG INFLUENCE ON JOINT BALANCE.”
Impact On Patient Outcomes
To determine the influence VERASENSE use might be having, Dr. Chow examined patient cohorts from both his prior manual approach and his current sensor-assisted technique—comparing outcome measurements and performance in post-op clinical visits and physical therapy. He found the rate of improvement in the VERASENSE group across all outcome measures (KSS Pain, KSS Function, Oxford Knee Score) from pre-op to 6-months was highly statistically significant when compared to manual TKA. In the clinic, the VERASENSE group also had a significantly higher range of motion at 6-months and improvement in range of motion from pre-op to 6-months. A higher percentage of patients in active deep flexion during physical therapy underlined the demonstrated increase in outcomes. Today, Dr. Chow uses VERASENSE in all of his primary TKAs, as well as in many revision cases.
“BEFORE I STARTED USING VERASENSE, MY PATIENTS WERE DOING VERY WELL, BUT I AM ALWAYS TRYING TO IMPROVE. CHANGES TO THE WAY I NOW APPROACH A TOTAL KNEE PROCEDURE HAVE RESULTED IN SIGNIFICANT IMPROVEMENTS IN MY PATIENTS’ OUTCOME MEASUREMENTS AND RANGES OF MOTION DURING THEIR RECOVERY AND REHAB.”
ABOUT DR. CHOW
Dr. Jimmy Chow is a board-certified hip and knee specialist with dual-fellowship training in Adult Reconstruction and Arthroscopic Surgery. He is the Director of Orthopaedics: Hip & Joint Surgery for St. Luke’s Medical Center, where he serves as faculty for both ACGME (USA) and ISAKOS (international) fellows. Dr. Chow is a paid consultant to OrthoSensor, Inc. Dr. Chow’s practice is focused on tissue preservation and rapid recovery. He is a partner at the Hedley Orthopaedic Institute in Phoenix, AZ.