WCE 2017: The Impact of Forces Applied during Ureteral Access Sheath Deployment on Ureteral Injury in a Porcine Model
Concerns exist over possible ureteral injury during UAS deployment. Dr. Kaler’s team developed the Ureteral Access Sheath Force Sensor (UAS-FS) at UC Irvine (UCI) in order to transmit real-time force data to an Android tablet during access sheath deployment. In their pilot, porcine study, they used the UCI UAS-FS to evaluate the force threshold that results in splitting of the ureteral urothelium.
In their study, they found no ureteral injury at ≤ 4 Newtons (N), but as UAS size increased, as expected, they identified greater force over-time and larger peak forces. They experienced their first ureteral injury at 8 N in the right ureter and at 10 N in the left ureter.
From this they concluded that the UC Irvine Force Sensor can reliably measure force while deploying a UAS. Initial ureteral injury occurred at forces > 8 N, and they are conducting a clinical study using this device, ensuring that they below the > 8 N during UAS deployment. This novel machine holds promise for minimizing ureteral injury in the future.
Presented by: Kamaljot S. Kaler
Authors: Kamaljot S. Kaler, Roshan M. Patel, Renai Yoon, Daniel J. Lama, Christina Hwang, Zhamshid Okhunov, Michael Klopfer, Jaime Landman, Ralph V. Clayman
Affiliation: Department of Urology, University of California, Irvine
Written by: Egor Parkhomenko, Department of Urology, University of California-Irvine Medical at the 35th World Congress of Endourology– September 12-16, 2017, Vancouver, Canada