Striped dichroic filter with butted stripes and dual lift-off method for making the same
Device for the indirect, non-invasive and continuous measurement of blood pressure
Blood constituent measuring device and method
Artificially induced blood pulse for use with a pulse oximeter
Non-invasive measuring method and apparatus of blood constituents
ApplicationNo. 482071 filed on 06/07/1995
US Classes:600/316, Glucose356/39BLOOD ANALYSIS
ExaminersPrimary: Sykes, Angela D.
Assistant: Yarnell, Bryan K.
Attorney, Agent or Firm
Foreign Patent References
International ClassA61B 005/00
AbstractA blood glucose monitoring system is disclosed which provides for inducing an active pulse in the blood volume of a patient. The induction of an active pulse results in a cyclic, and periodic change in the flow of blood through a fleshy medium under test. By actively inducing a change of the blood volume, modulation of the volume of blood can be obtained to provide a greater signal to noise ratio. This allows for the detection of constituents in blood at concentration levels below those previously detectable in a non-invasive system. Radiation which passes through the fleshy medium is detected by a detector which generates a signal indicative of the intensity of the detected radiation. Signal processing is performed on the electrical signal to isolate those optical characteristics of the electrical signal due to the optical characteristics of the blood.