A5293 DO WEARABLE ACTIVITY TRACKERS ENHANCE THE OUTCOMES OF BARIATRIC SURGERY? Habib Khoury 1 ; John Morton 1 ; Thomas Boillat 1 ; Sharon Wulfovich 1 ; Katarzyna Wac 1 ; Homero Rivas 2 ; 1 Stanford University, San Francisco CA; 2 Stanford University, Palo Alto CA Introduction: Wearable technology has gained traction within consumer electronics in the healthcare field. However, little is known regarding the effect of wearable technology in the bariatric surgery field. Here, we explore the benefits of wearable activity trackers in patients undergoing bariatric surgery. Methods: Participants in this study were randomized into treat- ment and control groups. Patients in the treatment group received a Withings TM activity tracker wristwatch and a smart scale 2 weeks after surgery. They were then instructed to use the activity tracker wristwatch daily and the scale weekly for 6 months. Weight and number of steps were recorded and collected from the Withings TM website. Demographics data, body mass index (BMI), and percent of excess weight loss (%EWL) were obtained preoperatively, 3 months, and 6 months postoperatively. All analyses were conducted using SPSS 22.0 and Graphpad Prism 7.0. Results: 47 patients participated in the study. 24 patients were randomly assigned to the treatment group and 23 were assigned to the control group. Patients in the treatment arm were younger than those in the control arm (36.63 ± 1.47 vs. 43.3 ± 2.21 years old, p¼0.0147). No significant differences were found between treat- ment and control patients in type of surgery (69.57% vs. 65.22% gastric bypass, p¼0.7531), sex (78.26% vs. 82.61% female, p¼0.7107), or preoperative BMI (49.95 ± 1.9 vs. 47.14 ± 2.1 kg/m 2 ,p¼0.3233). Patients in the treatment arm had a greater % EWL (57.7 ± 3.3%) at 6 months after surgery than patients in the control arm (52.7 ± 3.8%), however the difference did not reach statistical significance (p¼0.3373). Among patients in the treat- ment group, there was a statistically significant correlation between weight loss achieved and number of steps (r¼0.51, p¼0.0181). Patients who used the device actively and recorded a high number of steps (4500,000 steps) over the 6 months of the study witnessed greater weight loss than patients who recorded a low number of steps (65.5 ± 4.8% vs. 49.1 ± 2.7% EWL, p¼0.0096). Similarly, patients who used the device actively lost more weight than patients in the control group (65.5 ± 4.8% vs. 52.7 ± 3.8% EWL, p¼0.0466). Conclusion: Wearable technology has the potential to improve the health outcomes of patients undergoing bariatric surgery, suggest- ing further involvement of wearable technology in the field of bariatric surgery. A5294 MAGNETIC SURGERY FOR LIVER RETRACTION: AN INCISIONLESS APPROACH FOR LESS INVASIVE BARIATRIC SURGERY Daniel Guerron 1 ; Camila Ortega 1 ; Jesse Gutnick 1 ; Madhu Siddeswarappa 1 ; Juan Alvarez 2 ; Ranjan Sudan 1 ; Jin Yoo 1 ; Keri Seymour 1 ; Chan Park 1 ; Dana Portenier 1 ; 1 Duke University Health System, Durham NC; 2 Duke University Health System, Chapel Hill NC Introduction: In laparoscopic bariatric surgery, retraction of the liver is essential to ensure an appropriate working space. Many devices are currently available in the market for this purpose. However, these instruments cause morbidity to the liver due to the direct compression of the retraction force. Furthermore, the need for an additional incision increases the risk of complications such as bleeding, wound infection and patient discomfort. We have introduced a commercially available magnetic device to retract the liver during laparoscopic bariatric procedures at our center. We predict that this new technique for liver retraction will produce less trauma and related complications while maintaining a suitable field exposure. Methods: 14 patients underwent laparoscopic bariatric surgery at the Duke Center for Metabolic and Weight Loss Surgery. The procedures were performed using the Levita Magnetics Surgical System for the retraction of the liver. This system is comprised of an internal magnetic grasper with a detachable tip and an external magnet controller that can be freely manipulated to create a desired exposure. The grasper is designed and functions as a regular laparoscopic grasper, having a delivery/retrieval shaft that allows the deployment of the detachable tip. The tip was secured to the left lateral segment of the liver, the external magnet was then placed over the abdominal wall and magnetic attraction allowed the liver elevation. Once the procedure was completed, the external magnet was removed and the detachable grasper tip was recoupled to the magnetic grasper shaft and retrieved from the patient. Results: 5 LSG, 3 revisions (LABG removal, LAGB removal and conversion to LSG, GJ revision), 3 BPP/DS, and 3 RYGB were completed laparoscopically using the Levita System for liver retraction. The patients BMI ranged between 28.3 49.9 kg/m 2 . In all the cases the internal detachable magnetic tip was positioned on the border of the left lateral segment of the liver and coupled with the external magnet through the abdominal wall. Under direct visualization, the external magnet was mobilized to obtain appro- priate exposure during the entire procedure. No liver parenchymal injury was evident intraoperatively. Mean EBL: 10 ml, operative time: 116.2 minutes and LOS: 1.5 days. No complications attributed to the device or procedure. Surgeons described overall surgical exposure as excellent and device utilization as technically simple. Conclusion: The Levita Magnetics Surgical System is an incision- less technique for liver retraction that reduces liver compression and access related complications while providing appropriate surgical field exposure. A5295 ENDOSCOPIC GASTROJEJUNAL STOMAL REVISION AFTER WEIGHT REGAIN A SINGLE ACADEMIC CENTER EXPERIENCE Kaci Dudley 1 ; Manuel Garcia 2 ; Jeffrey Quigley 1 ; Daniel Srikureja 1 ; Stephanie Keeth 1 ; Marcos Michelotti 1 ; Esther Wu 1 ; Keith Scharf 1 ; 1 LLUMC, Loma Linda CA; 2 LLUMC, Redlands CA Background: Bariatric surgery is associated with significant sustained weight loss, with the Roux-en-Y gastric bypass being ASMBS E-Poster Abstracts / Surgery for Obesity and Related Diseases 13 (2017) S66–S226 S196