A
pulmonary artery blood
oxygen saturation monitoring device based on an
optical fiber sensor is disclosed, wherein an input end of a
driving circuit is connected with a computer, and the output end of the same is connected with two LED light sources,
light signal is incident into a focusing lens; a probe
system comprises two routes of
optical fiber sensing lines, one end of a first
route of
optical fiber is connected with a gem
crystal probe, and the other end is connected with the focusing lens; one end of a second
route of optical
fiber is connected with the gem
crystal probe, and the other end is connected with a photoelectric converter via
light signal; the two routes are staggered back and forth, the energy of the first
route LED
light source of optical
fiber is transmitted to the surface of an air path via optical
fiber and the gem
crystal probe, enters
pulmonary artery through the air path, returns to the internal side of the air path after being subjected to the
diffuse reflection of the
photon acted with blood, and is absorbed by the second gem crystal probe of the second route,
light signal after optical fiber transmissison is absorbed by the photoelectric converter, enters a computer after amplified shaping circuit and
data acquisition, and gives out parameters such as
pulmonary artery blood
oxygen saturation,
cardiac rate and the like by
software processing. The invention can realize high-precise real time monitoring without trauma.