14. Blood Leak Detector
14. BLOOD LEAK DETECTOR
14.1 OVERVIEW
The Blood Leak Detector (BLD) is an optical device used to detect
an internal blood leak from the dialyzer into the fluid path.
Depending on the circumstances, an external blood leak into the
atmosphere would generally cause an extracorporeal alarm. Refer
to Section 26, Alarms, and the Operator’s Manual for more
information on the extracorporeal alarms.
There is a possible delay in detecting an internal blood leak when
flow through the dialyzer circuit is at a minimum, such as during
manual bypass and sequential ultrafiltration.
The BLD sensitivity can be selected by a trained technician at any
of three different levels, independently of the dialysate flow rate.
Upon selection of the sensitivity, the Instrument will automatically
perform calibration of the BLD. Refer to Section 18.5.11 for more
information.
The BLD is accessible for cleaning purposes from the back of the
Instrument without having to open any doors. See Figure 14-1.
The purpose of the BLD Drain Line is to evacuate the fluid from
the BLD before removing the BLD cover when cleaning the BLD.
Figure 14-1. BLD and BLD Drain Line Location
157-1278-921 Rev A 14-3
April 2004
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