公开(公告)号：EP0693902A1

公开(公告)日：1996-01-31

申请号：EP94912917.0

申请日：1994-03-31

Applicant: NELLCOR INCORPORATED

Inventor： HOLLUB, Seth, D.

IPC: G01N21 ,  A61B5 ,  G05B19

CPC classification number: A61B5/14551 ,  G05B19/0423 ,  G05B2219/25249 ,  G05B2219/2657

Abstract: An apparatus for measuring the concentration of blood constituents in which the architecture of the electronic processor reduces the amount of controller processing time required for tasks such as data acquisition and generation of system control signals. A demodulator is coupled to a probe for converting a first electrical signal to digital data. An interface is coupled to the demodulator for receiving the digital data and generating interrupts when a first amount of the digital data has been received. A buffer memory is coupled to the interface for storing the digital data. A controller having a controller memory (in specific embodiments, a CPU having a CPU memory) is also coupled to the buffer memory. The controller transfers the digital data from the buffer memory to the controller memory in response to the interrupts. The controller then processes the digital data to calculate the arterial oxygen concentration.