# Understanding Ureteropelvic Junction Obstruction From a Scientometric Perspective: How Is the Global Research Activity and Collaboration Going?

## TL;DR

This paper analyzes global research trends on ureteropelvic junction obstruction using scientometric methods to understand activity and collaboration patterns.

## Contribution

The study provides a scientometric analysis of UPJO research, highlighting global trends and collaboration patterns from 1945 to 2024.

## Key findings

- The United States contributed the most publications on UPJO research.
- Recent keywords like 'assisted laparoscopic pyeloplasty' emerged since 2020.
- Research is concentrated in high-income countries, suggesting a need for international collaboration.

## Abstract

Ureteropelvic junction obstruction (UPJO) has been identified as the most prevalent cause of prenatally diagnosed hydronephrosis, characterized by a reduction in urine flow from the renal pelvis into the ureter. Management of this condition poses a significant clinical challenge, given the difficulty in differentiating between mild and benign cases and those with the potential to progress to severe renal impairment. This study is aimed at clarifying the global research activity and collaborative trends in UPJO research by undertaking a scientometric analysis, with the objective of providing valuable insights into the state of UPJO research.

Publications relevant to UPJO published between 1945 and 2024 were retrieved from the Web of Science Core Collection (WoSCC) database. The metrological software and graphing tools utilized included Bibliometrix 4.1.1, VOSviewer 1.6.20, GraphPad Prism 10, and Microsoft Excel 2020.

A total of 1447 publications between 1948 and 2024 were included. The United States contributed the most publications (n = 456, 31.5%), and the most productive journal is the Journal of Urology (n = 340, 23.5%). The latest keywords “classification”, “improvement”, and “assisted laparoscopic pyeloplasty” mainly appeared since 2020.

In recent decades, UPJO research has undergone consistent advancement, encompassing a multitude of disciplines and innovative therapeutic strategies. The predominant research initiatives have been concentrated in a select number of high‐income countries. To facilitate further progress in this domain, there is a need to fortify international collaborations and promote translational research.