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Erbium: YAG versus holmium:YAG lithotripsy.
J Urol. 2001 Mar; 165(3):876-9.JU

Abstract

PURPOSE

We test the hypothesis that erbium:YAG (Er:YAG) lithotripsy is more efficient than holmium:YAG (Ho:YAG) lithotripsy.

MATERIALS AND METHODS

Human calculi composed of greater than 97% calcium oxalate monohydrate and cystine were studied. Calculi were irradiated in water using Er:YAG or Ho:YAG lasers. Er:YAG lithotripsy was done with a 425 microm sapphire optical fiber at a pulse energy of 50 mJ at 10 Hz. Ho:YAG lithotripsy was performed with a 365 microm low hydroxy optical fiber at a pulse energy of 500 mJ at 10 Hz or a 425 microm sapphire optical fiber at a pulse energy of 50 mJ at 10 Hz. Fragmentation was defined as the initial stone mass minus the final dominant fragment mass and normalized for incident laser fluence (energy per unit area of fiber tip).

RESULTS

Mean fragmentation plus or minus standard deviation for calcium oxalate monohydrate was 38 +/- 27 mg for Er:YAG and 22 +/- 6 for Ho:YAG (low hydroxy silica fiber) versus 5 +/- 1 for Ho:YAG (sapphire fiber, p = 0.001). When fragmentation was normalized for incident laser fluence given different optical fiber sizes, mean fragmentation efficiency was 53.6 +/- 38.7 g-microm2/J for Er:YAG lithotripsy compared with 22.6 +/- 6.4 for Ho:YAG (low hydroxy silica fiber) lithotripsy (p = 0.04). Mean cystine fragmentation was 15 +/- 3 mg for Er:YAG versus 9 +/- 1 for Ho:YAG (sapphire fiber, p = 0.0005).

CONCLUSIONS

Er:YAG lithotripsy is more efficient than Ho:YAG lithotripsy.

Authors+Show Affiliations

Division of Urology, Department of Ophthalmology, University of Texas Health Science Center, San Antonio, Texas, USA.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

11176490

Citation

Teichman, J M., et al. "Erbium: YAG Versus holmium:YAG Lithotripsy." The Journal of Urology, vol. 165, no. 3, 2001, pp. 876-9.
Teichman JM, Chan KF, Cecconi PP, et al. Erbium: YAG versus holmium:YAG lithotripsy. J Urol. 2001;165(3):876-9.
Teichman, J. M., Chan, K. F., Cecconi, P. P., Corbin, N. S., Kamerer, A. D., Glickman, R. D., & Welch, A. J. (2001). Erbium: YAG versus holmium:YAG lithotripsy. The Journal of Urology, 165(3), 876-9.
Teichman JM, et al. Erbium: YAG Versus holmium:YAG Lithotripsy. J Urol. 2001;165(3):876-9. PubMed PMID: 11176490.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Erbium: YAG versus holmium:YAG lithotripsy. AU - Teichman,J M, AU - Chan,K F, AU - Cecconi,P P, AU - Corbin,N S, AU - Kamerer,A D, AU - Glickman,R D, AU - Welch,A J, PY - 2001/2/15/pubmed PY - 2001/5/5/medline PY - 2001/2/15/entrez SP - 876 EP - 9 JF - The Journal of urology JO - J Urol VL - 165 IS - 3 N2 - PURPOSE: We test the hypothesis that erbium:YAG (Er:YAG) lithotripsy is more efficient than holmium:YAG (Ho:YAG) lithotripsy. MATERIALS AND METHODS: Human calculi composed of greater than 97% calcium oxalate monohydrate and cystine were studied. Calculi were irradiated in water using Er:YAG or Ho:YAG lasers. Er:YAG lithotripsy was done with a 425 microm sapphire optical fiber at a pulse energy of 50 mJ at 10 Hz. Ho:YAG lithotripsy was performed with a 365 microm low hydroxy optical fiber at a pulse energy of 500 mJ at 10 Hz or a 425 microm sapphire optical fiber at a pulse energy of 50 mJ at 10 Hz. Fragmentation was defined as the initial stone mass minus the final dominant fragment mass and normalized for incident laser fluence (energy per unit area of fiber tip). RESULTS: Mean fragmentation plus or minus standard deviation for calcium oxalate monohydrate was 38 +/- 27 mg for Er:YAG and 22 +/- 6 for Ho:YAG (low hydroxy silica fiber) versus 5 +/- 1 for Ho:YAG (sapphire fiber, p = 0.001). When fragmentation was normalized for incident laser fluence given different optical fiber sizes, mean fragmentation efficiency was 53.6 +/- 38.7 g-microm2/J for Er:YAG lithotripsy compared with 22.6 +/- 6.4 for Ho:YAG (low hydroxy silica fiber) lithotripsy (p = 0.04). Mean cystine fragmentation was 15 +/- 3 mg for Er:YAG versus 9 +/- 1 for Ho:YAG (sapphire fiber, p = 0.0005). CONCLUSIONS: Er:YAG lithotripsy is more efficient than Ho:YAG lithotripsy. SN - 0022-5347 UR - https://www.unboundmedicine.com/medline/citation/11176490/Erbium:_YAG_versus_holmium:YAG_lithotripsy_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0022-5347(05)66548-2 DB - PRIME DP - Unbound Medicine ER -