# Implantable hydrogel patch USMP for ultrasound monitoring of gastric leakage tested in rabbits

- Published: 2026-11-13 06:03 UTC
- Section: Life & Health › Medicine
- Tags: ultrasonic metagel patch, gastric leakage monitoring, implantable hydrogel sensor, ultrasound imaging, pH-responsive hydrogel, air cell array, postoperative complication, Science Advances
- URL: https://realtech.media/news/rt-80bc59b47be71328b8d509dd_implantable_hydrogel_patch/

**A fully hydrogel patch with air cells in concentric rings gives a distinct ultrasound signature; its use for up to 7 days was validated in live rabbits.**

![Implantable hydrogel patch USMP for ultrasound monitoring of gastric leakage tested in rabbits](https://realtech.media/media/2026/11/454a9b6c22c9021c.jpg)
*Goleisureintl, Wikimedia Commons, CC BY 4.0*

Researchers reported in Science Advances a fully hydrogel implantable ultrasonic metagel patch (USMP) for direct, real-time monitoring of gastric leakage by ultrasound imaging. Its potential for monitoring up to 7 days after implantation was validated in a live rabbit model [1].

According to the authors, gastric leakage is a common and life-threatening postoperative complication, and delayed detection often leads to severe abdominal organ damage. Current radiological imaging modalities are limited in timely detection of leakage. The mechanical mismatch and long-term persistence of conventional electronic sensors restrict their implantable use [1].

The USMP contains a tree-ring air cell array. Densely distributed air cells arranged in concentric rings create a strong back-scattering effect, which produces distinctive and stable ultrasound imaging signatures for rapid and sensitive detection [1]. The air cells are encapsulated within biocompatible, hydrolytically degradable pH-responsive hydrogels, forming a fully hydrogel sensing architecture [1].

## Sources

1. [Science Advances](https://doi.org/10.1126/sciadv.aef2310)

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Source: RealTech, realtech.media — https://realtech.media/news/rt-80bc59b47be71328b8d509dd_implantable_hydrogel_patch/