Patent ID: 8444613

Claim:
A therapeutic device, which includes: a fluid mover for one of raising, compressing, or transferring fluid which includes a first draw-down pump for generating an initial draw down vacuum and a second pump in fluid communication with said first draw-down pump for maintaining a desired vacuum and for compensating for leaks and pressure fluctuations; a therapeutic member operably connected to said fluid mover and actuated thereby, said therapeutic member operably disposably used on a patient in a manner to deliver therapy to the patient as function of actuation of said fluid mover; a controller operably associated with said fluid mover for controlling operation thereof, wherein said controller equipped to control pressure in accordance with sensed pressure at a vacuum and a canister for maintaining and applying a negative pressure compressible therapeutic dressing of a sterile porous substrate about a wound to form a seal about the wound through the negative pressure; a pressure sensor operably connected to said fluid mover and said controller and to sense a leak in said device and send a signal to said controller whereby said controller controls said fluid mover as a function of said sensed signal wherein said controller first obtains electronic data which quantifies that a pump motor is running by passing said data through a low pass filter and comparing output data against a preset value D 1 to determine said pump motor is running, and upon said pump motor lasting a predetermined time C 1 , said controller initiates said first draw down pump obtains a pressure reading Ps after running said first draw down pump for less than about 1 second, said controller initiates a pulse test and obtains a start pressure Ps and causes said first draw-down pump to runs for a predetermined time and obtains a pressure Pt and determines if Pt>Ps+Pi, where Pi is a fixed constant indicating the a large difference and one of a full canister and line blockage; a check valve operatively connected to said controller interposed between said therapeutic member and said fluid mover to cut off fluid communication therebetween upon pressure reaching a predetermined threshold; and an RFID member physically associated with said canister and RFID sensor operably associated with said controller such that said controller restricts use of said canister as a function of said RFID member.