A Swann-Ganz catheter is for thermal dilution one off measurement.
The PiCCO system seems to have become the default standard for Continuous CO.
It has been used in all the hospitals I have worked in.
PiCCO is a system devised by
Pulsion I know Philips have a module and I would not be surprised if other monitor manufacturers do. You can also get stand alone PiCCO monitors.
Robert