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document
Comparison of nitinol tipless stone baskets in an in vitro caliceal model . PURPOSE Tipless stone baskets facilitate caliceal calculi extraction during flexible ureteroscopy . We evaluated the stone capture rate of 9 commercially available tipless stone baskets in an in vitro model using novice and expert operators . MATERIALS AND METHODS The Microvasive Zerotip ( 2.4Fr , 3.0Fr ) , Cook N-Circle ( 2.2Fr , 3.0Fr , 3.2Fr ) , Bard Dimension ( 3.0Fr , Sacred Heart Medical Halo ( 1.9Fr ) , Vantage ( 1.9Fr ) and Circon-ACMI Sur-Catch-NT ( 3.0Fr ) were tested by 3 novice and 3 experienced basket operators . Each operator performed stone extraction of 2 , 5 and 8 mm calculi ( size determined by digital caliper with 3 repetitions of each basket . The time to extraction of the calculus from a convex based test tube caliceal model was recorded . Statistical analysis was performed using repeated measures ANOVA and Fisher 's pairwise comparisons . RESULTS After a learning curve of 27 basket retrievals , there was no significant difference in stone capture times between novice ( 38 +/- 54 seconds ) and expert operators ( 32 +/- 49 seconds , p = 0.174 ) . For total stone capture ( all sizes ) the Sacred Heart Halo resulted in the most rapid stone extraction ( 17 +/- 14 seconds ) by novices and experts , while the Sur-Catch NT resulted in the slowest stone extraction ( 78 +/- 90 , seconds , p = 0.001 ) . The Halo ( 14 +/- 9 seconds ) and Vantage ( 19 +/- 12 seconds ) baskets were significantly faster for 2 mm calculi than the N-Circle ( 73 +/- 60 seconds , p = 0.006 ) , Sur-Catch ( 169 +/- 85 seconds , p = 0.0005 ) and Dimension ( 73 +/- 70 seconds , p = 0.017 ) . The Zerotip functioned well for 2 mm calculi in the hands of expert operators ( 15 +/- 9 seconds ) but not novice operators ( 94 +/- 95 seconds ) . The Sur-Catch NT was significantly slower for 2 mm calculi than the N-Circle ( p = 0.01 ) , Dimension ( p =.03 ) , Halo ( p =.0005 ) , Vantage ( p =.001 ) and Zerotip ( p =.002 ) . For 5 mm calculi the Halo was superior ( 12 +/- 8 seconds ) , while the Zerotip were superior for 8 mm calculi ( 8 +/- 3 seconds ) compared to the N-Circle ( 23 +/- 28 seconds , p = 0.026 ) , Halo ( 26 +/- 18 seconds , p = 0.021 ) and Vantage ( 23 +/- 15 seconds , p = 0.006 ) . CONCLUSIONS The Sacred Heart Halo and Vantage baskets resulted in the most expeditious stone extraction , especially for 2 to 5 mm calculi while the Microvasive Zerotip was optimal for 8 mm calculi . The Sur-Catch NT had the slowest stone capture rate for all stone sizes . Caliceal models of stone basketing may be useful to train novice urology residents and nursing assistants .
17825
Intervention_Physical
nitinol tipless stone baskets
17826
Intervention_Physical
Tipless stone baskets
17827
Intervention_Physical
tipless stone baskets
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Intervention_Surgical
stone extraction
17829
Outcome_Physical
vitro
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Outcome_Other
stone capture times
17831
Outcome_Other
rapid stone extraction
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Outcome_Other
most expeditious stone extraction
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Outcome_Other
slowest stone capture rate