Journal List > Korean J Urol > v.49(12) > 1005035

Kim, Oh, and Moon: The Effect of Tamsulosin on Expulsion of Ureteral Stones after Extracorporeal Shock Wave Lithotripsy

Abstract

Purpose

The aim of this study was to evaluate the effect of tamsulosin on expulsion of ureteral stones after extracorporeal shock wave lithotripsy (ESWL).

Materials and Methods

Seventy-six patients (39 with upper ureteral stones and 37 with lower ureteral stones) treated with ESWL for stones <10mm were randomly divided into two groups. Tamsulosin (0.2mg orally once daily) was administered to group 1; group 2 received no medications. All patients were evaluated with respect to the number of episodes of ureteral colic, the expulsion rates of stones after ESWL, and the mean number of sessions of ESWL until complete expulsion of stones.

Results

The complete expulsion rates of upper and lower ureteral stones did not differ significantly between groups 1 and 2 during each session of ESWL; however, the mean session of ESWL was lower in group 1 than in group 2. For upper ureteral stones, 1.8 sessions were necessary per patient in group 1, while 2.3 sessions were required for the patients in group 2 (p=0.039). For lower ureteral stones, 2.0 sessions were necessary per patient in group 1, while 2.9 sessions were required for the patients in group 2 (p=0.032). There were significant decreases in the number of episodes of pain in group 1 with lower ureteral stones (p=0.014). There were no side effects associated with tamsulosin.

Conclusions

The use of tamsulosin in the treatment of upper and lower ureteral stones after ESWL can decrease the mean number of sessions of ESWL and the number of episodes of pain, but cannot improve the expulsion rate. Further research regarding the cost-effectiveness of tamsulosin after ESWL is needed.

References

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Fig. 1.
There was no difference in the cumulative expulsion rate between the group administered tamsulosin and the no medication group after extracorporeal shock wave lithotripsy (ESWL) involving upper ureteral stones.
kju-49-1100f1.tif
Fig. 2.
There was no difference in expulsion rates between the group administered tamsulosin and the no medication group after extracorporeal shock wave lithotripsy (ESWL) involving lower ureteral stones.
kju-49-1100f2.tif
Table 1.
Patient characteristics
  Upper ureter stone Lower ureter stone
Group 1 Group 2 Group 1 Group 2
  (n=18) (n=21) (n=24) (n=13)
Mean age±SD (years) 48.3±13.0 49.5±14.1 52.1±11.6 47.8±12.8
Male:Female (number) 12:6 12:9 15:9 10:3
Right:Left 7:11 8:12 8:16 5:8

SD: standard deviation

Table 2.
Comparison of stone size, intervals between sessions of ESWL, and mean number of sessions of ESWL
  Upper ureter stone p-value Lower ureter stone p-value
Group 1 (n=18) Group 2 (n=21) Group 1 (n=24) Group 2 (n=13)
Size±SD (mm) 6.2±2.2 6.5±2.4 0.330 5.4±2.3 5.4±2.3 0.495
ESWL interval (days) 4.6±3.6 4.8±2.4 0.429 4.7±3.1 4.2±3.1 0.345
ESWL session (No.) 1.8±1.0 2.3±0.7 0.039 2.0±1.0 2.9±1.9 0.032

SD: standard deviation, ESWL: extracorporeal shock wave lithotripsy

Table 3.
Comparison of the expulsion rate at each ESWL session
ESWL session 1 2 3 4 5 6 7 8
Upper ureter stone Group 1 (%) 44.4 (8/18) 38.9 (7/18) 11.1 (2/18) 0 (0/18) 5.6 (1/18)      
  Group 2 (%) 33.3 (7/21) 42.9 (9/21) 19.0 (4/21) 4.8 (1/21)        
p-value∗ 0.506 41.7 0.063 25.0 0.667 25.0 1.000 8.3        
Lower ureter stone Group 1 (%) (10/24) 30.8 (6/24) 7.7 (6/24) 30.8 (2/24) 23.0 0 0 0 7.7
  Group 2 (%) (4/13) (1/13) (4/13) (3/13) (0/13) (0/13) (0/13) (1/13)
p-value∗ 0.725 0.383 0.715 0.321        

ESWL: extracorporeal shock wave lithotripsy, ∗: chi square and Fisher's exact test

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