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Background <p>Obesity <!--Query ID="Q1" Text="Please check and confirm that the authors and their respective affiliations have been correctly identified and amend if necessary. " Resolved="yes"-->significantly increases the risk of developing urinary tract stones, particularly distal ureteral stones, which can complicate treatment with extracorporeal shockwave lithotripsy (SWL). In obese patients, the distance between the skin and the stone often exceeds the effective shockwave range, reducing SWL efficacy. This study presents an innovative SWL assistive device designed to address this challenge by using natural body passages such as the rectum or vagina to shorten the distance between the skin and the stone.</p> Methods <p>Three <!--Query ID="Q2" Text="Kindly check and confirm whether the corresponding authors are correctly identified and amend if necessary. " Resolved="yes"-->obese patients with distal ureteral stones who were initially unsuitable for conventional SWL due to excessive skin-to-stone distance were included. An assistive device was used via natural body passages to reduce the skin-to-stone distance during SWL. Clinical outcomes were assessed by postoperative imaging. Descriptive analysis was performed.</p> Result <p>In three obese<!--Query ID="Q3" Text="Please check &quot;Clinical trial number&quot; was change to &quot;Trial registration&quot;." Resolved="yes"--> patients with distal ureteral stones, the use of the device allowed SWL to be performed effectively, with no residual stones detected on follow-up imaging. The device has been patented in China (Patent No.: ZL 2020 2 2018950.0) and is undergoing larger-scale clinical trials to further evaluate its safety and efficacy.</p> Conclusions <p>This <!--Query ID="Q4" Text="Please check if the affiliations are presented correctly. " Resolved="yes"-->development offers a promising solution for obese patients who were previously unable to undergo effective SWL treatment.</p> Trial registration <p>Not applicable.</p>

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A novel assistive device for enhancing extracorporeal shockwave lithotripsy in obese patients with distal ureteral stones

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月31日

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  • Minghao Zhang,
  • Peng Liu,
  • Qi Wang,
  • Fan Chang,
  • Taipeng Li,
  • Yuanjie Niu,
  • Hailong Hu

摘要

Background

Obesity significantly increases the risk of developing urinary tract stones, particularly distal ureteral stones, which can complicate treatment with extracorporeal shockwave lithotripsy (SWL). In obese patients, the distance between the skin and the stone often exceeds the effective shockwave range, reducing SWL efficacy. This study presents an innovative SWL assistive device designed to address this challenge by using natural body passages such as the rectum or vagina to shorten the distance between the skin and the stone.

Methods

Three obese patients with distal ureteral stones who were initially unsuitable for conventional SWL due to excessive skin-to-stone distance were included. An assistive device was used via natural body passages to reduce the skin-to-stone distance during SWL. Clinical outcomes were assessed by postoperative imaging. Descriptive analysis was performed.

Result

In three obese patients with distal ureteral stones, the use of the device allowed SWL to be performed effectively, with no residual stones detected on follow-up imaging. The device has been patented in China (Patent No.: ZL 2020 2 2018950.0) and is undergoing larger-scale clinical trials to further evaluate its safety and efficacy.

Conclusions

This development offers a promising solution for obese patients who were previously unable to undergo effective SWL treatment.

Trial registration

Not applicable.