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Bare naked baskets: ureteroscope deflection and flow characteristics with intact and disassembled ureteroscopic nitinol stone baskets.
J Urol. 2002 Jun; 167(6):2377-9.JU

Abstract

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.

Authors+Show Affiliations

Division of Urology, Department of Radiology, Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, Missouri, USA.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

11992041

Citation

Landman, Jaime, et al. "Bare Naked Baskets: Ureteroscope Deflection and Flow Characteristics With Intact and Disassembled Ureteroscopic Nitinol Stone Baskets." The Journal of Urology, vol. 167, no. 6, 2002, pp. 2377-9.
Landman J, Monga M, El-Gabry EA, et al. Bare naked baskets: ureteroscope deflection and flow characteristics with intact and disassembled ureteroscopic nitinol stone baskets. J Urol. 2002;167(6):2377-9.
Landman, J., Monga, M., El-Gabry, E. A., Rehman, J., Lee, D. I., Bhayani, S., Sundaram, C. P., & Clayman, R. V. (2002). Bare naked baskets: ureteroscope deflection and flow characteristics with intact and disassembled ureteroscopic nitinol stone baskets. The Journal of Urology, 167(6), 2377-9.
Landman J, et al. Bare Naked Baskets: Ureteroscope Deflection and Flow Characteristics With Intact and Disassembled Ureteroscopic Nitinol Stone Baskets. J Urol. 2002;167(6):2377-9. PubMed PMID: 11992041.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Bare naked baskets: 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 - 2002/5/7/pubmed PY - 2002/6/18/medline PY - 2002/5/7/entrez SP - 2377 EP - 9 JF - The Journal of urology JO - J Urol VL - 167 IS - 6 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. SN - 0022-5347 UR - https://www.unboundmedicine.com/medline/citation/11992041/Bare_naked_baskets:_ureteroscope_deflection_and_flow_characteristics_with_intact_and_disassembled_ureteroscopic_nitinol_stone_baskets_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0022-5347(05)64988-9 DB - PRIME DP - Unbound Medicine ER -