All study participants will be monitored following the study period until complete closure of the pressure ulcer is achieved in order to determine total interval to final closure, including any surgical procedures required. In addition, the economic effects of pulsatile lavage treatment will be evaluated through monitoring of data collected in CPRS, including duration of admission, duration of total bedrest order and duration of treatment for pressure ulcer. This data will give an initial measure of the cost benefits that may be achieved with the use of pulsatile lavage for the treatment of pressure ulcers.