2019 ASCO GU Symposium

2019 ASCO GU Symposium

INTERVIEW WITH DENA BATTLE
Patient Perspectives on Cytoreductive Nephrectomy after the CARMENA Trial

VIEW ALL ASCO GU 2019 VIDEOS

Prostate Cancer Foundation 2018 Scientific Retreat

Prostate Cancer Foundation 2018 Scientific Retreat

INTERVIEW WITH OLIVER SARTOR
Overall Survival Benefit and Racial Disparities in African American Men with Metastatic Prostate Cancer

VIEW ALL PCF VIDEOS

2019 ASCO GU Symposium

2019 ASCO GU Symposium

INTERVIEW WITH KARIM FIZAZI
ARAMIS - Efficacy and Safety of Darolutamide in nmCRPC

VIEW ALL ASCO GU 2019 VIDEOS

2019 ASCO GU Symposium

2019 ASCO GU Symposium

INTERVIEW WITH JAMES GULLEY
Immunotherapy Across Genitourinary Malignancies

VIEW ALL ASCO GU 2019 VIDEOS

Featured Videos

#WCE2014 - Use of novel technique to estimate ureter length using preoperative CT - Interview

TAIPEI, TAIWAN (UroToday.com) - Introduction and objectives: Optimal ureteral stent placement depends upon accurate estimation of ureteral length. Conventionally, CT measurements of ureteral length measure a single dimension. In this study, we compare ureteroscopically measured ureteral length to the CT + 20% method and a novel method base on the Pythagorean theorem that considers the ureteral length in all three dimensions.

wceMethods: Preoperative CT scans were reviewed for 55 patients undergoing flexible ureteroscopy. The ureteral length was estimated on the axial (a), saggital (s) and coronal (c) views. Using the Pythagorean theorem, the ureteral length (U) was determined using the derived equation: U=√(s2 + c2 - a2). Ureter length was also calculated by adding 20% to the measurement in axial length. These two methods were then compared to the direct measurement of ureteral length measured by noting the location of the UPJ and UVJ on the external surface of the ureteroscope at the meatus. The distance between the two points on the endoscope was the ureteroscopically measured ureteral length. Pearson correlation coefficient was used for statistical comparison, with p < 0.05 considered significant.

Results: The Pearson correlation coefficient of actual length with axial measurement + 20%was 0.239 (p = 0.079). There was a better correlation using the novel Pythagorean theorem method that significantly correlated with the actual length 0.325 (p = 0.016).

Conclusions: We report a novel Pythagorean based mathematical model to predict ureteral length based upon preoperative CT imaging. This technique provides higher correlation to actual ureteral length compared to conventional methods. Use of this model may improve outcomes of stent placement.

Source of Funding: None

 
View an interview with Nazih Khater, one of the authors of this study.

 

Presented by Nazih Khater, Roger Li, Muhannad Alsyouf, Michelle Lightfoot, Carol Conceicao, Christopher Chung, Gaudencio Olgin, Javier Arenas, Evan Lehrman, Jason Smith, and D. Duane Baldwin at the 32nd World Congress of Endourology & SWL - September 3 - 7, 2014 - Taipei, Taiwan

Loma Linda University Medical Center, USA

 

Conference Coverage
 
Recent data from conferences worldwide
Journals
Publications focusing on urologic cancer treatments through original manuscripts
Everyday Urology Volume 3 Issue 4

Everyday Urology™ - Oncology Insights

PCAN cover

Prostate Cancer and Prostatic Diseases

From the Editor

E-Newsletters

Newsletter subscription

Free Daily and Weekly newsletters offered by content of interest

The fields of GU Oncology and Urology are rapidly advancing. Sign up today for articles, videos, conference highlights and abstracts from peer-review publications by disease and condition delivered to your inbox and read on the go.

Subscribe