USPTO Patent Application: Negative Pressure Wound Therapy Self-Testing

ChangeBridge: Patent Apps - Medical Devices (A61M)

Published March 26th, 2026

Detected March 26th, 2026

Summary

The USPTO has published a patent application (US20260083899A1) for a negative pressure wound therapy device with self-testing capabilities. The application details a system that includes a negative pressure source, valve, flow restrictor, pressure sensor, and control circuitry for performing leak, flow, or excessive pressure tests.

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What changed

This document is a USPTO patent application (US20260083899A1) for a negative pressure wound therapy (NPWT) device. The application, filed on December 3, 2025, and published on March 26, 2026, describes a novel system incorporating self-testing features. These features include a valve, flow restrictor, pressure sensor, and control circuitry designed to perform leak, flow, or excessive pressure tests, enhancing device reliability and potentially patient safety.

As this is a patent application, it does not impose direct compliance obligations on medical device manufacturers. However, it signifies innovation in the NPWT field. Companies developing or manufacturing NPWT devices should be aware of this patent filing as it may impact future product development, intellectual property strategies, and competitive landscape within the medical device sector.

Source document (simplified)

← USPTO Patent Applications

SELF-TESTING FOR NEGATIVE PRESSURE WOUND THERAPY DEVICES

Application US20260083899A1 Kind: A1 Mar 26, 2026

Inventors

Ben Alan Askem, David Michael Elder, Danielle Susan Johnson, Camilo Patrick Madriz, Andrea Maggiore, Christopher John Webb

Abstract

A negative pressure wound therapy device can include a negative pressure source configured to be connected, via a fluid flow path, to a wound, a valve positioned in the fluid flow path and configured to, in an open state, permit supply of negative pressure from the negative pressure source upstream of the valve and, in a closed state, block supply of negative pressure from the negative pressure source upstream of the valve, a flow restrictor positioned in the fluid flow path, and a pressure sensor configured to measure a pressure differential across the flow restrictor. The device can include control circuitry configured to, in a normal operational mode, cause the valve to be in the open state and, in a test mode, perform at least one of a leak test, a flow test, or an excessive pressure test.