公开(公告)号：US11219711B2

公开(公告)日：2022-01-11

申请号：US16158525

申请日：2018-10-12

Applicant: KCI Licensing, Inc.

Inventor： Loren Francis ,  Reuben W. Edgar, Jr.

IPC: A61M35/00 ,  A61M1/00 ,  A61M27/00 ,  A61F13/00 ,  A61F13/02

Abstract: In one example embodiment, a system for stimulating healing of tissue at a wound site is disclosed. The system comprises a dressing including a porous pad and a drape covering the pad at a wound site for maintaining negative pressure at a wound site, a negative-pressure source including a pump and an electric motor to generate a pump pressure (PP) for applying to the wound site, and a first pressure sensor for sensing the pump pressure (PP). The system further comprises a controller coupled to the first pressure sensor and electric motor and including a PID controller that compares the pump pressure (PP) to a target pump pressure (TPP) and a bang-bang controller that controls wound pressure (WP) proximate the wound site, and wherein the controller is configured to alternatively select the bang-bang controller when the system is in a low-leakage condition or the PID controller when the system is in a high-leakage condition.