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2015 ; 13
(2
): 75-9
Nephropedia Template TP
gab.com Text
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English Wikipedia
Safety and efficacy of using the stone cone and an entrapment and extraction
device in ureteroscopic lithotripsy for ureteric stones
#MMPMID26413324
Shabana W
; Teleb M
; Dawod T
Arab J Urol
2015[Jun]; 13
(2
): 75-9
PMID26413324
show ga
OBJECTIVE: To assess the safety and efficacy of using a stone cone and an
entrapment and extraction device (N-Trap®, Cook Urological, Bloomington, IN, USA)
to avoid stone retropulsion during ureteroscopic lithotripsy for ureteric stones.
PATIENTS AND METHODS: This retrospective comparative study included 436 patients
treated with ureteroscopic lithotripsy for a single ureteric stone from February
2011 to January 2014. The diagnosis of a stone was confirmed by plain spiral
computed tomography in all cases. Patients were divided according to the ureteric
occlusion device applied to avoid stone retropulsion during pneumatic lithotripsy
into three groups; group 1 (156) had no instruments used, group 2 (140) in whom
the stone cone was applied, and group 3 (140) in whom the N-Trap was used.
Patient demographics, stone criteria, operative duration and complications, and
success rates (complete stone disintegration with no upward migration) were
reported and analysed statistically. RESULTS: The stone was in the lower ureter
in >55% of patients in all groups. The mean (SD) of maximum stone length was 9.8
(2.5), 10.4 (2.8) and 9.7 (2.9) in groups 1-3, respectively. The use of the stone
cone or N-Trap did not significantly increase the operative duration (P = 0.13)
or complication rates (P = 0.67). There was a statistically significant
difference (P < 0.001) favouring groups 2 and 3 for retropulsion and success
rates, being 83.3% in group 1, 97.1% in group 2 and 95.7% in group 3. CONCLUSION:
The stone cone and N-Trap gave high success rates in preventing stone
retropulsion during ureteric pneumatic lithotripsy. Both devices caused no
increase in operative duration or complications when used cautiously.