04:38 AM EDT, 07/16/2025 (MT Newswires) -- (Updates with the latest stock price movement in the headline and the last paragraph.)

Nuwellis ( NUWE ) said late Tuesday it received a patent related to advancements in fluid management from the US Patent and Trademark Office.

The patent, titled 'Extracorporeal Blood Filtering Machine and Methods,' covers mechanisms for enhancing the accuracy of fluid balance calculations by incorporating the density of replacement fluids and effluent.

The approach allows continuous renal replacement therapy systems to consider actual fluid density for more accurate volumetric flow tracking, the company said.

Nuwellis ( NUWE ) shares were up nearly 61% in recent premarket activity Wednesday.