Abstract
Purpose: We have previously developed and reported an ultrasound based real-time tracking system for renal stones. In the current study we continued to verify the reliability of this tracking system by a simulated animal test. Materials and Methods: We used 13 prerecorded ultrasound stone trajectories to test the system. The real-time tracking system was implemented on the Litemed 9200 electrohydraulic lithotriptor (LiteMed Co., Taipei, Taiwan). An artificial stone and tap water were sealed in a balloon. The balloon was inserted into the pelvis of a pig kidney. While the kidney was affixed to and moved by a simulator, it was immersed in a specifically designed simulated animal model tank containing tap water. The stone was localized by ultrasound. The kidney was moved by the simulator according to a prerecorded stone trajectory. A total of 3,000 shock waves were delivered to the stone. For each recorded stone trajectory experiments were done under nontracking and tracking conditions. We performed tests of the fragment-to-weight ratio, which denotes the performance of a shock wave lithotriptor when fragmenting a stone. Results: The mean fragment-to-weight ratio was 55.3% ± 25.9% in the nontracking and 100% ± 0% in the tracking group. The difference in these 2 groups was statistically significant (paired t test p < 0.01). Conclusions: The ultrasound based real-time tracking system proved to improve the performance of a shock wave lithotriptor significantly when fragmenting stones in a simulated animal test. We believe that the tracking system would greatly reduce the number of shocks and time needed for treating renal stones.
| Original language | English |
|---|---|
| Pages (from-to) | 2594-2597 |
| Number of pages | 4 |
| Journal | Journal of Urology |
| Volume | 167 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2002 Jan 1 |
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All Science Journal Classification (ASJC) codes
- Urology
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In vitro study of ultrasound based real-time tracking for renal stones in shock wave lithotripsy : Part II - A simulated animal experiment. / Chang, C. C.; Manousakas, I.; Pu, Y. R.; Liang, S. M.; Chen, C. H.; Chen, T. S.; Yu, F. M.; Yang, W. H.; Tong, Y. C.; Kuo, C. L.
In: Journal of Urology, Vol. 167, No. 6, 01.01.2002, p. 2594-2597.Research output: Contribution to journal › Article
TY - JOUR
T1 - In vitro study of ultrasound based real-time tracking for renal stones in shock wave lithotripsy
T2 - Part II - A simulated animal experiment
AU - Chang, C. C.
AU - Manousakas, I.
AU - Pu, Y. R.
AU - Liang, S. M.
AU - Chen, C. H.
AU - Chen, T. S.
AU - Yu, F. M.
AU - Yang, W. H.
AU - Tong, Y. C.
AU - Kuo, C. L.
PY - 2002/1/1
Y1 - 2002/1/1
N2 - Purpose: We have previously developed and reported an ultrasound based real-time tracking system for renal stones. In the current study we continued to verify the reliability of this tracking system by a simulated animal test. Materials and Methods: We used 13 prerecorded ultrasound stone trajectories to test the system. The real-time tracking system was implemented on the Litemed 9200 electrohydraulic lithotriptor (LiteMed Co., Taipei, Taiwan). An artificial stone and tap water were sealed in a balloon. The balloon was inserted into the pelvis of a pig kidney. While the kidney was affixed to and moved by a simulator, it was immersed in a specifically designed simulated animal model tank containing tap water. The stone was localized by ultrasound. The kidney was moved by the simulator according to a prerecorded stone trajectory. A total of 3,000 shock waves were delivered to the stone. For each recorded stone trajectory experiments were done under nontracking and tracking conditions. We performed tests of the fragment-to-weight ratio, which denotes the performance of a shock wave lithotriptor when fragmenting a stone. Results: The mean fragment-to-weight ratio was 55.3% ± 25.9% in the nontracking and 100% ± 0% in the tracking group. The difference in these 2 groups was statistically significant (paired t test p < 0.01). Conclusions: The ultrasound based real-time tracking system proved to improve the performance of a shock wave lithotriptor significantly when fragmenting stones in a simulated animal test. We believe that the tracking system would greatly reduce the number of shocks and time needed for treating renal stones.
AB - Purpose: We have previously developed and reported an ultrasound based real-time tracking system for renal stones. In the current study we continued to verify the reliability of this tracking system by a simulated animal test. Materials and Methods: We used 13 prerecorded ultrasound stone trajectories to test the system. The real-time tracking system was implemented on the Litemed 9200 electrohydraulic lithotriptor (LiteMed Co., Taipei, Taiwan). An artificial stone and tap water were sealed in a balloon. The balloon was inserted into the pelvis of a pig kidney. While the kidney was affixed to and moved by a simulator, it was immersed in a specifically designed simulated animal model tank containing tap water. The stone was localized by ultrasound. The kidney was moved by the simulator according to a prerecorded stone trajectory. A total of 3,000 shock waves were delivered to the stone. For each recorded stone trajectory experiments were done under nontracking and tracking conditions. We performed tests of the fragment-to-weight ratio, which denotes the performance of a shock wave lithotriptor when fragmenting a stone. Results: The mean fragment-to-weight ratio was 55.3% ± 25.9% in the nontracking and 100% ± 0% in the tracking group. The difference in these 2 groups was statistically significant (paired t test p < 0.01). Conclusions: The ultrasound based real-time tracking system proved to improve the performance of a shock wave lithotriptor significantly when fragmenting stones in a simulated animal test. We believe that the tracking system would greatly reduce the number of shocks and time needed for treating renal stones.
UR - http://www.scopus.com/inward/record.url?scp=0036090656&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0036090656&partnerID=8YFLogxK
U2 - 10.1016/S0022-5347(05)65043-4
DO - 10.1016/S0022-5347(05)65043-4
M3 - Article
C2 - 11992093
AN - SCOPUS:0036090656
VL - 167
SP - 2594
EP - 2597
JO - Journal of Urology
JF - Journal of Urology
SN - 0022-5347
IS - 6
ER -