Abstract: An embodiment generally relates to a method of signal discrimination. The method includes receiving plurality of signal mixtures, where each signal has a property whose value is based on a principal eigenvalue of a unique separating operator. The method also includes creating a separating operator using a target signal approximation and applying a separating operator for a target signal to the plurality of signal mixtures. The method further includes obtaining the target signal based on an operation of optimization of the separating operator for maximum property value amplitude on the plurality of signal mixtures.

Abstract: Systems for draining retained body fluids comprise an implantable port in an access tube. Usually, a drainage cannula for connecting the implantable port to a site of fluid retention is also provided. The implantable port and drainage cannula are implanted subcutaneously with one end of the cannula within the site of fluid retention and the port located remotely from such site. Drainage may then be effected by percutaneously introducing the access tube to the port and optionally applying a vacuum. Kits comprise the implantable port together with instructions for implanting the port as described above. Kits also comprise an access tube with instructions for use for accessing an implanted port as described above.