The two types of NPWT systems include the tNPWT system that has successfully completed a coding verification request with CMS and has the following capabilities (e.g., range of negative pressure, connective tubing, canister, foam or gauze filler, and approved for home use), and a portable, canister-less, battery operated, disposable PICO system to see if there are any observed differences with regard to the clinical efficacy of the two devices.