Wireless Ureteral Stent Sleeve Promises Early Hydronephrosis Detection

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Researchers have developed a wireless ureteral stent sleeve called UroSleeve that can continuously monitor kidney pressure, enabling earlier detection of hydronephrosis - a serious complication associated with ureteral stents. The modular device fits over standard stents without altering their structure, providing a practical solution to an often overlooked medical issue.

Why it matters

Hydronephrosis caused by blocked ureteral stents can lead to kidney damage if not caught early. Current detection methods like X-rays and CT scans are intermittent, leaving patients vulnerable. UroSleeve's real-time monitoring could revolutionize stent management, allowing clinicians to intervene sooner and improve patient outcomes.

The details

UroSleeve combines a flexible spiral antenna with a microfabricated pressure sensor, enabling continuous, non-invasive tracking of kidney pressure. Its modular design allows it to be adapted to various commercial stent platforms. In ex vivo testing, the device demonstrated the ability to detect pressure increases through shifts in resonant frequency, with a sensitivity of -5.3 ± 0.74 kHz/mmHg up to 56 mmHg.

• The UroSleeve study was published in Microsystems & Nanoengineering in 2026.

What’s next

The next steps include in vivo studies to validate UroSleeve's performance under physiological conditions, followed by long-term reliability studies and biocompatibility testing. The ultimate goal is to improve patient safety and reduce healthcare burdens associated with delayed hydronephrosis detection.