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How to perform the dusting technique for calcium oxalate stone phantoms during Ho:YAG laser lithotripsy.
BMC Urol. 2018 Nov 13; 18(1):103.BU

Abstract

BACKGROUND

To determine the most efficacious setting of Holmium:yttrium-aluminum-garnet (Ho:YAG) laser with a maximum power output of 120 W with in vitro phantom-stone dusting technique.

METHODS

A laser was used to treat two 4 × 3 × 3 mm3 sized phantom stones in 5 mL syringes with 1 mm-sized holes at the bottom. According to the pulse width (short 500, middle 750, long pulse 1000 μsec), maximal pulse repetition rates from 50 to 80 Hz were tested with pulse energy of 0.2, 0.4, 0.5, and 0.8 J. Six times of the mean dusting times were measured at each setting. Dusting was performed at continuous firing of the laser until the stones become dusts < 1 mm.

RESULTS

The mean Hounsfield unit of phantom stones was 1309.0 ± 60.8. The laser with long pulse generally showed shorter dusting times than short or middle pulse width. With increasing the pulse energy to 0.5 J, the dusting time decreased. However, the pulse energy of 0.8 J showed longer dusting times than those of 0.5 J. On the post-hoc analysis, the pulse energy of 0.5 J, long pulse width, and the repetition rates of 70 Hz demonstrated significantly shorter dusting times than other settings.

CONCLUSIONS

The results suggest that long pulse width with 0.5 J and 70 Hz would be the most efficacious setting for dusting techniques of plaster stone phantoms simulating calcium oxalate stones using the 120 W Ho:YAG laser.

Authors+Show Affiliations

Department of Urology, Dongguk University Ilsan Hospital, Dongguk University College of Medicine, 27, Dongguk-ro, Ilsandong-gu, Goyang-si, Gyeonggi-do, 410-773, Republic of Korea.Department of Urology, Seoul Paik Hospital, Inje University College of Medicine, 9, Mareunnae-ro, Jung-gu, Seoul, 100-032, Republic of Korea.Department of Urology, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul National University College of Medicine, 20, Boramae-ro 5-Gil, Dongjak-gu, Seoul, 156-707, Republic of Korea. kmoretry@daum.net.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30424765

Citation

Lee, Jeong Woo, et al. "How to Perform the Dusting Technique for Calcium Oxalate Stone Phantoms During Ho:YAG Laser Lithotripsy." BMC Urology, vol. 18, no. 1, 2018, p. 103.
Lee JW, Park MG, Cho SY. How to perform the dusting technique for calcium oxalate stone phantoms during Ho:YAG laser lithotripsy. BMC Urol. 2018;18(1):103.
Lee, J. W., Park, M. G., & Cho, S. Y. (2018). How to perform the dusting technique for calcium oxalate stone phantoms during Ho:YAG laser lithotripsy. BMC Urology, 18(1), 103. https://doi.org/10.1186/s12894-018-0417-5
Lee JW, Park MG, Cho SY. How to Perform the Dusting Technique for Calcium Oxalate Stone Phantoms During Ho:YAG Laser Lithotripsy. BMC Urol. 2018 Nov 13;18(1):103. PubMed PMID: 30424765.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - How to perform the dusting technique for calcium oxalate stone phantoms during Ho:YAG laser lithotripsy. AU - Lee,Jeong Woo, AU - Park,Min Gu, AU - Cho,Sung Yong, Y1 - 2018/11/13/ PY - 2017/07/06/received PY - 2018/10/30/accepted PY - 2018/11/15/entrez PY - 2018/11/15/pubmed PY - 2019/2/26/medline KW - Calcium oxalate KW - Dusting KW - Energy KW - Ho:YAG laser KW - Lithotripsy SP - 103 EP - 103 JF - BMC urology JO - BMC Urol VL - 18 IS - 1 N2 - BACKGROUND: To determine the most efficacious setting of Holmium:yttrium-aluminum-garnet (Ho:YAG) laser with a maximum power output of 120 W with in vitro phantom-stone dusting technique. METHODS: A laser was used to treat two 4 × 3 × 3 mm3 sized phantom stones in 5 mL syringes with 1 mm-sized holes at the bottom. According to the pulse width (short 500, middle 750, long pulse 1000 μsec), maximal pulse repetition rates from 50 to 80 Hz were tested with pulse energy of 0.2, 0.4, 0.5, and 0.8 J. Six times of the mean dusting times were measured at each setting. Dusting was performed at continuous firing of the laser until the stones become dusts < 1 mm. RESULTS: The mean Hounsfield unit of phantom stones was 1309.0 ± 60.8. The laser with long pulse generally showed shorter dusting times than short or middle pulse width. With increasing the pulse energy to 0.5 J, the dusting time decreased. However, the pulse energy of 0.8 J showed longer dusting times than those of 0.5 J. On the post-hoc analysis, the pulse energy of 0.5 J, long pulse width, and the repetition rates of 70 Hz demonstrated significantly shorter dusting times than other settings. CONCLUSIONS: The results suggest that long pulse width with 0.5 J and 70 Hz would be the most efficacious setting for dusting techniques of plaster stone phantoms simulating calcium oxalate stones using the 120 W Ho:YAG laser. SN - 1471-2490 UR - https://www.unboundmedicine.com/medline/citation/30424765/How_to_perform_the_dusting_technique_for_calcium_oxalate_stone_phantoms_during_Ho:YAG_laser_lithotripsy_ L2 - https://bmcurol.biomedcentral.com/articles/10.1186/s12894-018-0417-5 DB - PRIME DP - Unbound Medicine ER -