The Level Detector Module - Fresenius Medical Care 2008T Operator's Manual

Chapter 1—Overview

The Level Detector Module

The Level detector module is used to monitor the level of fluid in the venous drip chamber.
The venous drip chamber is mounted inside its holder and the blood tubing leading back to
the patient is threaded through the venous line clamp below it. An ultrasonic device inside
the chamber holder monitors the drip chamber for the presence of air. If the level of blood in
the chamber is too low and air is detected, the machine alarms, the blood pumps stops, and
the clamp occludes the venous blood tubing.
An optical sensor located below the occlusion clamp recognizes whether or not blood, an
opaque fluid, is detected in the venous line. When the dialysate supply lines are on the shunt,
and the shunt door is closed, and blood is not sensed, the audible alarm is suppressed entirely.
Also located on the front of the module is a pressure port. The small monitor line from the
drip chamber is connected to the transducer port. The pressure of the venous side of the
blood circuit is read by the transducer mounted on the inside of the module, and the pressure
is displayed in the "Home" screen.
Venous Drip
Chamber
Holder
Level Detector
Sensor
Optical
Detector
Figure 13 – The Level Detector Module
36 2008T Machine Operator's Manual P/N 490122 Rev N
Venous
Pressure Port
Up/Down
Level Adjust
Door
Latch
Venous
Clamp
Optical Detector
Door (Rotate
Clockwise to Open)