Method and apparatus for detecting a blood leak in a hemodialysi

Details Method and apparatus for detecting a blood leak in a hemodialysi Method and apparatus for detecting a blood leak in a hemodialysi

1978-03-22

1979-09-04

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250574, 356 39, G01N 2126

Patent

active

041669614

ABSTRACT:
A blood leak in the dialyzer is detected by transmitting a pulsed beam of light into the dialysate flowstream at a predetermined angle of incidence between the central axis of the flowstream and the normal axis and measuring variations in reflecting light received by a photodetector arranged on the same side of the flowstream as the phototransmitter at a predetermined angle of reflection. The beam of light is interupted at a rate with a substantially equal on-time to off time ratio.

REFERENCES:
patent: 3352779 (1967-11-01), Austin et al.
patent: 3809241 (1974-05-01), Alvine
patent: 4038982 (1977-08-01), Burke et al.

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