PRESSURE WAVEFORM MONITOR

摘要

A pressure waveform monitor noninvasively monitors the pressure waveform in an underlying vessel such as an artery. The apparatus comprises at least one /continuous, relatively thin and narrow diaphragm mounted in a housing to be placed on the tissue overlying the vessel of interest. The diaphragm is longer than the diameter of the vessel for purposely monitoring pressure in the tissue adjacent the vessel of interest. The tonometer also comprises deformation sensor means for measuring deformation of the diaphragm both over the vessel and adjacent the vessel, and signal processing means for combining the waveform of the vessel as monitored by the part of the diaphragm over the vessel with the waveforms of adjacent tissue to accurately determine the actual pressure waveform in the vessel.