Achieve Negative Dialysate Pressure; Section 11 - Induced Air Leak Tests - Fresenius Medical Care 2008T Troubleshooting Manual

The following procedures use negative dialysate pressure to locate a potential air leak. Use a flashlight to
look THROUGH tubing. If air is seen continue, against the direction of flow (Figure below), to the next
component until air bubbles are not seen.
NOTE!
Air is NORMAL in some locations, for example through the input tubing of Deaeration Pump #20
AND in the 'To Drain' circuit.
A) Referring to Figure 75
START in the middle of the tubing segment. If bubbles are located this may be the problem!
B) Temperature and Conductivity MUST remain normal and the external flow indicator's 'bob' MUST be
rising and falling!
C) RESET ALL alarms!
D) If not already, run the alarms and pressure tests. At this point it does not matter if they pass!
E) Turn the blood pump on so that is is rotating at least 100 ml/min.
F) From the Home screen, set [UF Goal] to 1000; set [UF Time] to 1:00 Hr.
G) Press 'Enter'
H) See procedure number
AIR- 1.0.0 ACHIEVE NEGATIVE DIALYSATE PRESSURE
This procedure describes how to acheive negative pressure (TMP). TMP MUST be kept between 300 and
360 mmHg for ALL subsequent tests. If it EVER falls below 300 perform parts a THROUGH c below:
a) RESET ALL alarms!
b) Press the front panel's UF on/off key. Figure right, the UF
Lamp MUST stay on solid indicating UF is on.
c) Allow TMP (Figure right) to reach 280 then IMMEDIATELY
turn UF off (UF Lamp off)!
d) See procedure number
SECTION 11 – INDUCED AIR LEAK TESTS
(page 535), look through the Flow Pump's (clear) input tubing for air bubbles that
AIR- 1.0.0 (page 534).
AIR- 1.0.1 (page 535).
2008T Troubleshooting Guide
P/N 490292 Rev. A
Page 534