Computed tomography-based novel prediction model for the stone-free rate of ureteroscopic lithotripsy

Jong Wook Kim, Ji Yun Chae, Jin Wook Kim, Mi-Mi Oh, Hong Seok Park, Du Geon Moon, Cheol Yong Yoon

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The purpose of this study was to evaluate whether computed tomography (CT) parameters can predict the success of ureteroscopic lithotripsy (URSL) and establish a model for predicting the success rates of a single URSL procedure for the treatment of a single ureteral stone. We retrospectively reviewed the records of 237 patients who underwent URSL for ureteral stones diagnosed by CT between January 2009 and June 2012. Stone-free status was defined as the absence of stones or residual stone fragments <2 mm by ureteroscopy and plain abdominal radiography. We analyzed the correlations between the outcome of URSL and the patients' sex, age, height, body weight, body mass index, and history of ureteral stone. Stone factors such as the diameter (D), stone height (H), volumetric stone burden (VSB; D 2 × H × 5 mm × π × 1/6), estimated stone location (ESL; number of axial cut images between the stone and uretero-vesical junction), tissue rim sign (RS; 0-3), perinephric edema (0-3), hydronephrosis (0-3), and Hounsfield unit (HU) were also analyzed. We then developed a model to predict the probability of successful URSL by applying a logistic model to our data. The success rate of URSL was 85.7 % (203/237). Univariate analysis found that stone diameter, length, VSB, ESL, HU and RS significantly affected the stone-free rate. Multivariate analysis indicated that stone diameter, ESL and RS independently influenced the stone-free rate. The logistic model indicated that success rates = 1/[1 + exp{-6.146 + 0.071(D) + 0.153(ESL) + 1.534(RS)}] with an area under the receiver operating characteristic curve of 0.825. Stone diameter, ESL, and RS were independent predictors of the outcome of a single URSL for a single ureteral stone.

Original languageEnglish
Pages (from-to)75-79
Number of pages5
JournalUrolithiasis
Volume42
Issue number1
DOIs
Publication statusPublished - 2014 Jan 1

Fingerprint

Lithotripsy
Tomography
Logistic Models
Abdominal Radiography
Ureteroscopy
Hydronephrosis
ROC Curve
Edema
Urinary Bladder
Body Mass Index
Multivariate Analysis
Body Weight

Keywords

  • Computed tomography
  • Ureteral stone
  • Ureteroscopic lithotripsy

ASJC Scopus subject areas

  • Urology

Cite this

Computed tomography-based novel prediction model for the stone-free rate of ureteroscopic lithotripsy. / Kim, Jong Wook; Chae, Ji Yun; Kim, Jin Wook; Oh, Mi-Mi; Park, Hong Seok; Moon, Du Geon; Yoon, Cheol Yong.

In: Urolithiasis, Vol. 42, No. 1, 01.01.2014, p. 75-79.

Research output: Contribution to journalArticle

Kim, Jong Wook ; Chae, Ji Yun ; Kim, Jin Wook ; Oh, Mi-Mi ; Park, Hong Seok ; Moon, Du Geon ; Yoon, Cheol Yong. / Computed tomography-based novel prediction model for the stone-free rate of ureteroscopic lithotripsy. In: Urolithiasis. 2014 ; Vol. 42, No. 1. pp. 75-79.
@article{4e55d02a429948028d8543d7ee361147,
title = "Computed tomography-based novel prediction model for the stone-free rate of ureteroscopic lithotripsy",
abstract = "The purpose of this study was to evaluate whether computed tomography (CT) parameters can predict the success of ureteroscopic lithotripsy (URSL) and establish a model for predicting the success rates of a single URSL procedure for the treatment of a single ureteral stone. We retrospectively reviewed the records of 237 patients who underwent URSL for ureteral stones diagnosed by CT between January 2009 and June 2012. Stone-free status was defined as the absence of stones or residual stone fragments <2 mm by ureteroscopy and plain abdominal radiography. We analyzed the correlations between the outcome of URSL and the patients' sex, age, height, body weight, body mass index, and history of ureteral stone. Stone factors such as the diameter (D), stone height (H), volumetric stone burden (VSB; D 2 × H × 5 mm × π × 1/6), estimated stone location (ESL; number of axial cut images between the stone and uretero-vesical junction), tissue rim sign (RS; 0-3), perinephric edema (0-3), hydronephrosis (0-3), and Hounsfield unit (HU) were also analyzed. We then developed a model to predict the probability of successful URSL by applying a logistic model to our data. The success rate of URSL was 85.7 {\%} (203/237). Univariate analysis found that stone diameter, length, VSB, ESL, HU and RS significantly affected the stone-free rate. Multivariate analysis indicated that stone diameter, ESL and RS independently influenced the stone-free rate. The logistic model indicated that success rates = 1/[1 + exp{-6.146 + 0.071(D) + 0.153(ESL) + 1.534(RS)}] with an area under the receiver operating characteristic curve of 0.825. Stone diameter, ESL, and RS were independent predictors of the outcome of a single URSL for a single ureteral stone.",
keywords = "Computed tomography, Ureteral stone, Ureteroscopic lithotripsy",
author = "Kim, {Jong Wook} and Chae, {Ji Yun} and Kim, {Jin Wook} and Mi-Mi Oh and Park, {Hong Seok} and Moon, {Du Geon} and Yoon, {Cheol Yong}",
year = "2014",
month = "1",
day = "1",
doi = "10.1007/s00240-013-0609-0",
language = "English",
volume = "42",
pages = "75--79",
journal = "Urolithiasis",
issn = "2194-7228",
publisher = "Springer Verlag",
number = "1",

}

TY - JOUR

T1 - Computed tomography-based novel prediction model for the stone-free rate of ureteroscopic lithotripsy

AU - Kim, Jong Wook

AU - Chae, Ji Yun

AU - Kim, Jin Wook

AU - Oh, Mi-Mi

AU - Park, Hong Seok

AU - Moon, Du Geon

AU - Yoon, Cheol Yong

PY - 2014/1/1

Y1 - 2014/1/1

N2 - The purpose of this study was to evaluate whether computed tomography (CT) parameters can predict the success of ureteroscopic lithotripsy (URSL) and establish a model for predicting the success rates of a single URSL procedure for the treatment of a single ureteral stone. We retrospectively reviewed the records of 237 patients who underwent URSL for ureteral stones diagnosed by CT between January 2009 and June 2012. Stone-free status was defined as the absence of stones or residual stone fragments <2 mm by ureteroscopy and plain abdominal radiography. We analyzed the correlations between the outcome of URSL and the patients' sex, age, height, body weight, body mass index, and history of ureteral stone. Stone factors such as the diameter (D), stone height (H), volumetric stone burden (VSB; D 2 × H × 5 mm × π × 1/6), estimated stone location (ESL; number of axial cut images between the stone and uretero-vesical junction), tissue rim sign (RS; 0-3), perinephric edema (0-3), hydronephrosis (0-3), and Hounsfield unit (HU) were also analyzed. We then developed a model to predict the probability of successful URSL by applying a logistic model to our data. The success rate of URSL was 85.7 % (203/237). Univariate analysis found that stone diameter, length, VSB, ESL, HU and RS significantly affected the stone-free rate. Multivariate analysis indicated that stone diameter, ESL and RS independently influenced the stone-free rate. The logistic model indicated that success rates = 1/[1 + exp{-6.146 + 0.071(D) + 0.153(ESL) + 1.534(RS)}] with an area under the receiver operating characteristic curve of 0.825. Stone diameter, ESL, and RS were independent predictors of the outcome of a single URSL for a single ureteral stone.

AB - The purpose of this study was to evaluate whether computed tomography (CT) parameters can predict the success of ureteroscopic lithotripsy (URSL) and establish a model for predicting the success rates of a single URSL procedure for the treatment of a single ureteral stone. We retrospectively reviewed the records of 237 patients who underwent URSL for ureteral stones diagnosed by CT between January 2009 and June 2012. Stone-free status was defined as the absence of stones or residual stone fragments <2 mm by ureteroscopy and plain abdominal radiography. We analyzed the correlations between the outcome of URSL and the patients' sex, age, height, body weight, body mass index, and history of ureteral stone. Stone factors such as the diameter (D), stone height (H), volumetric stone burden (VSB; D 2 × H × 5 mm × π × 1/6), estimated stone location (ESL; number of axial cut images between the stone and uretero-vesical junction), tissue rim sign (RS; 0-3), perinephric edema (0-3), hydronephrosis (0-3), and Hounsfield unit (HU) were also analyzed. We then developed a model to predict the probability of successful URSL by applying a logistic model to our data. The success rate of URSL was 85.7 % (203/237). Univariate analysis found that stone diameter, length, VSB, ESL, HU and RS significantly affected the stone-free rate. Multivariate analysis indicated that stone diameter, ESL and RS independently influenced the stone-free rate. The logistic model indicated that success rates = 1/[1 + exp{-6.146 + 0.071(D) + 0.153(ESL) + 1.534(RS)}] with an area under the receiver operating characteristic curve of 0.825. Stone diameter, ESL, and RS were independent predictors of the outcome of a single URSL for a single ureteral stone.

KW - Computed tomography

KW - Ureteral stone

KW - Ureteroscopic lithotripsy

UR - http://www.scopus.com/inward/record.url?scp=84896401591&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84896401591&partnerID=8YFLogxK

U2 - 10.1007/s00240-013-0609-0

DO - 10.1007/s00240-013-0609-0

M3 - Article

VL - 42

SP - 75

EP - 79

JO - Urolithiasis

JF - Urolithiasis

SN - 2194-7228

IS - 1

ER -