ABSTRACT
Analog waveforms from bedside photoplethysmograph flap-monitoring devices have been
transmitted via telephone lines to remote monitoring stations. Two methods for data
transfer have been successfully used in clinical practice. One employs equipment similar
to that used for transmission of EKG signals; the second uses paired microcomputers
linked with telephone modems. These readily available technologies enable remote evaluation
of the adequacy of perfusion of free tissue transfers.
