TY - JOUR
T1 - Bare naked baskets
T2 - Ureteroscope deflection and flow characteristics with intact and disassembled ureteroscopic nitinol stone baskets
AU - Landman, Jaime
AU - Monga, Manoj
AU - El-Gabry, Ehab A.
AU - Rehman, Jamil
AU - Lee, David I.
AU - Bhayani, Sam
AU - Sundaram, Chandru P.
AU - Clayman, Ralph V.
PY - 2002/1/1
Y1 - 2002/1/1
N2 - Purpose: Lower pole renal access during flexible ureterorenoscopy is often limited by the active deflection capabilities of the ureteroscope. Deterioration in the deflection and flow capabilities of ureteroscopes occurs with the passage of instrumentation through the working channel. We performed in vitro evaluation of a novel technique using unsheathed nitinol baskets to minimize the deterioration in deflection and maximize the irrigant flow associated with instrument passage through the working channel during flexible ureterorenoscopy. Materials and Methods: Alterations in the irrigant flow and active deflection of 4 ureteroscopes from different manufacturers were evaluated. Each ureteroscope was evaluated with an empty working channel, and then with sheathed and unsheathed 2.2, 3 and 3.2Fr (Cook Urological, Inc., Indianapolis, Indiana), 2.4 and 3Fr (Microvasive Urology, Natick, Massachusetts) nitinol baskets in the working channel. Results: With all baskets tested and in all ureteroscopes the deterioration in active deflection and irrigant flow was improved with the unsheathed baskets. The disassembled basket within the working channel allowed an additional 15 to 20 degrees of active deflection. In addition, the disassembled basket allowed for a 2 to 30-fold increase in irrigant flow compared with an intact basket. Conclusions: The combination of improved deflection and irrigant flow with this technique may improve ureteroscopic access to lower pole renal calculi.
AB - Purpose: Lower pole renal access during flexible ureterorenoscopy is often limited by the active deflection capabilities of the ureteroscope. Deterioration in the deflection and flow capabilities of ureteroscopes occurs with the passage of instrumentation through the working channel. We performed in vitro evaluation of a novel technique using unsheathed nitinol baskets to minimize the deterioration in deflection and maximize the irrigant flow associated with instrument passage through the working channel during flexible ureterorenoscopy. Materials and Methods: Alterations in the irrigant flow and active deflection of 4 ureteroscopes from different manufacturers were evaluated. Each ureteroscope was evaluated with an empty working channel, and then with sheathed and unsheathed 2.2, 3 and 3.2Fr (Cook Urological, Inc., Indianapolis, Indiana), 2.4 and 3Fr (Microvasive Urology, Natick, Massachusetts) nitinol baskets in the working channel. Results: With all baskets tested and in all ureteroscopes the deterioration in active deflection and irrigant flow was improved with the unsheathed baskets. The disassembled basket within the working channel allowed an additional 15 to 20 degrees of active deflection. In addition, the disassembled basket allowed for a 2 to 30-fold increase in irrigant flow compared with an intact basket. Conclusions: The combination of improved deflection and irrigant flow with this technique may improve ureteroscopic access to lower pole renal calculi.
KW - Calculi
KW - Equipment and supplies
KW - Kidney
KW - Lithotripsy
KW - Ureter
UR - http://www.scopus.com/inward/record.url?scp=0036093096&partnerID=8YFLogxK
U2 - 10.1016/S0022-5347(05)64988-9
DO - 10.1016/S0022-5347(05)64988-9
M3 - Article
C2 - 11992041
AN - SCOPUS:0036093096
VL - 167
SP - 2377
EP - 2379
JO - The Journal of Urology
JF - The Journal of Urology
SN - 0022-5347
IS - 6
ER -