Measuring device, dialysis end condition determining device, and dialysis progress presenting device

1. A measuring device comprising:

an analysis unit that holds blood or serum therein;

an irradiation unit that irradiates fluorescent substances in the blood or the serum with excitation light; and

a light receiving unit that receives fluorescence generated upon irradiation with the excitation light, wherein

the analysis unit includes:

an inflow port through which the blood or the serum flows in; and

an outflow port through which the blood or the serum flows out; wherein

when inflow and outflow of the blood or the serum are in an equilibrium state, a fluid pool of the blood or the serum is formed inside the analysis unit;

the analysis unit is a drip chamber;

the fluid pool of the blood or serum is located inside of the drip chamber;

the irradiation unit is positioned outside the drip chamber and irradiates fluorescent substances in the fluid pool with excitation light through a wall of the drip chamber;

the light receiving unit is positioned outside the drip chamber and receives fluorescence in the fluid pool with the excitation light through a portion of the wall of the drip chamber, the portion contacting the fluid pool; and

the blood or the serum is irradiated with the excitation light from the irradiation unit in a direction that is perpendicular to a direction in which the fluorescence is received by the light receiving unit.

2. The measuring device according to claim 1 , wherein the analysis unit includes a hole through which a syringe is inserted to sample the blood or the serum from the fluid pool.

3. The measuring device according to claim 1 , wherein the measuring device obtains the serum through centrifugal separation of the blood.

4. The measuring device according to claim 1 , wherein when the blood or the serum branched from a flow passage, through which the blood or the serum flows at a first flow rate, flows into the analysis unit, the measuring device further comprises a regulator that decelerates the blood or the serum flowing into the analysis unit to a second flow rate.

5. The measuring device according to claim 4 , wherein

the regulator is a needle valve; and

the second flow rate is regulated to be 10 ml/min or less by rotating a needle of the needle valve.

6. The measuring device according to claim 1 , wherein the analysis unit is made of quartz.

7. The measuring device according to claim 1 , wherein the irradiation unit irradiates the fluorescent substances in the blood or the serum with the excitation light having a peak wavelength in a range of 338 to 342 nm; and

the light receiving unit receives the fluorescence having a peak wavelength in a range of 420 to 460 nm.

8. A dialysis end condition determining device including:

the measuring device according to claim 1 ; and

a determination unit that is connected to the measuring device and compares an amount of fluorescent substances, which is estimated from a measurement result of fluorescence intensity obtained by measuring the intensity of fluorescence by the measuring device, with a predetermined reference value, and that determines, based on a comparison result, whether a dialysis end condition is satisfied.

9. A dialysis progress presenting device including:

the measuring device according to claim 1 ; and

a presentation unit that is connected to the measuring device and continuously presents an amount of fluorescent substances, which is estimated from a measurement result of fluorescence intensity obtained by measuring the intensity of fluorescence by the measuring device.