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Conference Paper: When do we need flexible ureteroscopy during ureteroscopic lithotripsy (URSL) for ureteric stones?

TitleWhen do we need flexible ureteroscopy during ureteroscopic lithotripsy (URSL) for ureteric stones?
Authors
Issue Date2017
PublisherBlackwell Publishing Asia. The Journal's web site is located at http://www.blackwellpublishing.com/journals/IJU
Citation
15th Urological Association of Asia (UAA) Congress: Piecing Together Asian Perspectives in Urology, Hong Kong, 4–6 August 2017. In International Journal of Urology, 2017, v. 24 n. Suppl. 1, p. 118 How to Cite?
AbstractIntroduction and objectives: To determine predictive factors for therequirement of flexible ureteroscopy (F-URS) when rigid ureteroscopy(URS) fails during URSL and to evaluate outcomes of URSL by rigidURS and F-URS.Materials and methods: Operative record of URSLs performed from2012 to 2016 in our institution were reviewed. In 40 patients, rigidURS was not able to access the ureteric stone and stone fragmentationwas achieved by flexible URS. Patient demographics, stonecharacteristics, complication and stone free rate were recorded.Comparative analysis with another group of 40 patients who hadsuccessful rigid URS in the same period was performed.Results: Patient demographics were comparable between the URS andF-URS group. Mean stone size was larger in the F-URS group(11.5 mm) than the URS group (8.3 mm, P < 0.05). 95% of the stonesin the F-URS group were upper ureteric stones as compared to 23% inthe URS group (P < 0.05). In univariate analysis, stone size, stonelocation, presence of hydronephrosis and presence of ureteric stentwere factors predicting failure of rigid URS. Upon multivariateanalysis, stone location and presence of hydronephrosis wereindependent predictive factors for requirement of F-URS. Comparedwith the rigid URS group, the F-URS group had longer operative time(80 min vs 36 min, P < 0.05) and lower stone free rate (68% vs 95%,P < 0.05). There was no difference in complication rate between thetwo groups.Conclusion: Upper ureteric stone and presence of hydronephrosiswere independent predictive factors for requiring F-URS during URSL.Flexible URS has equivalently low complication rate as rigid URS butthe operative time is longer with lower stone free rate.
Descriptionposter presentation - abstract no. PP191
Persistent Identifierhttp://hdl.handle.net/10722/254927
ISSN
2017 Impact Factor: 1.941
2015 SCImago Journal Rankings: 0.841

 

DC FieldValueLanguage
dc.contributor.authorTsang, CF-
dc.contributor.authorWong, CKW-
dc.contributor.authorLai, TCT-
dc.contributor.authorHo, SHB-
dc.contributor.authorNg, ATL-
dc.contributor.authorMa, WK-
dc.contributor.authorTsu, HLJ-
dc.contributor.authorYiu, MK-
dc.date.accessioned2018-06-21T01:08:44Z-
dc.date.available2018-06-21T01:08:44Z-
dc.date.issued2017-
dc.identifier.citation15th Urological Association of Asia (UAA) Congress: Piecing Together Asian Perspectives in Urology, Hong Kong, 4–6 August 2017. In International Journal of Urology, 2017, v. 24 n. Suppl. 1, p. 118-
dc.identifier.issn0919-8172-
dc.identifier.urihttp://hdl.handle.net/10722/254927-
dc.descriptionposter presentation - abstract no. PP191-
dc.description.abstractIntroduction and objectives: To determine predictive factors for therequirement of flexible ureteroscopy (F-URS) when rigid ureteroscopy(URS) fails during URSL and to evaluate outcomes of URSL by rigidURS and F-URS.Materials and methods: Operative record of URSLs performed from2012 to 2016 in our institution were reviewed. In 40 patients, rigidURS was not able to access the ureteric stone and stone fragmentationwas achieved by flexible URS. Patient demographics, stonecharacteristics, complication and stone free rate were recorded.Comparative analysis with another group of 40 patients who hadsuccessful rigid URS in the same period was performed.Results: Patient demographics were comparable between the URS andF-URS group. Mean stone size was larger in the F-URS group(11.5 mm) than the URS group (8.3 mm, P < 0.05). 95% of the stonesin the F-URS group were upper ureteric stones as compared to 23% inthe URS group (P < 0.05). In univariate analysis, stone size, stonelocation, presence of hydronephrosis and presence of ureteric stentwere factors predicting failure of rigid URS. Upon multivariateanalysis, stone location and presence of hydronephrosis wereindependent predictive factors for requirement of F-URS. Comparedwith the rigid URS group, the F-URS group had longer operative time(80 min vs 36 min, P < 0.05) and lower stone free rate (68% vs 95%,P < 0.05). There was no difference in complication rate between thetwo groups.Conclusion: Upper ureteric stone and presence of hydronephrosiswere independent predictive factors for requiring F-URS during URSL.Flexible URS has equivalently low complication rate as rigid URS butthe operative time is longer with lower stone free rate.-
dc.languageeng-
dc.publisherBlackwell Publishing Asia. The Journal's web site is located at http://www.blackwellpublishing.com/journals/IJU-
dc.relation.ispartofInternational Journal of Urology-
dc.relation.ispartof15th Urological Association of Asia (UAA) Congress-
dc.rightsThe definitive version is available at www.blackwell-synergy.com-
dc.titleWhen do we need flexible ureteroscopy during ureteroscopic lithotripsy (URSL) for ureteric stones?-
dc.typeConference_Paper-
dc.identifier.emailWong, CKW: kwwongab@hku.hk-
dc.identifier.emailHo, SHB: hobrian@hku.hk-
dc.identifier.emailNg, ATL: ada5022@hku.hk-
dc.identifier.emailMa, WK: mwk054@hku.hk-
dc.identifier.emailTsu, HLJ: jamestsu@hku.hk-
dc.identifier.emailYiu, MK: pmkyiu@hku.hk-
dc.identifier.hkuros285488-
dc.identifier.volume24-
dc.identifier.issueSuppl. 1-
dc.identifier.spage118-
dc.identifier.epage118-
dc.publisher.placeAustralia-

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