Chapter 3—Setting Treatment Parameters
2008K Hemodialysis Machine Operator’s Manual Rev P 75
Ultrafiltration
Use the UF Goal and UF Time buttons to determine the necessary UF rate for the treatment.
The UF rate (set in Service Mode) is limited to between 1000 ml/hr or 4000 ml/hr (at 1000
ml/hr intervals), depending on the option selected. The UF Goal is limited to 9990 ml. Reset
the UF removed to zero after setting the UF time. The ultrafiltration will be at a steady rate
throughout the treatment. When the UF key is turned off, no ultrafiltration is occurring.
When the Tx Clock button is turned on, the UF pump (as well as a number of other
functions) is automatically started. When the UF goal has been achieved, the UF time is set
to 0:00, and the UF rate goes to 70 ml/hr (conventional dialyzers) or 300 ml/hr (high flux
dialyzers). If a profile (variation during treatment) is desired for the UF rate, use the UF
Profile button.
Warning! When using high-flux dialyzers with low UF rates there is a possibility of back-
filtration. Back filtration depends on: type of high-flux dialyzer, flow resistance on dialysate
and blood sides, and blood viscosity.
Note: Weigh the dialysis patient before and after treatment to check against fluid removal
discrepancies.
Setting a UF Profile
The different UF Profiles available are used to improve patient comfort during dialysis by
providing alternating patterns of high and low rates of ultrafiltration. This also allows the
fluid in the patient to equilibrate more completely between the intracellular and extracellular
compartments. A UF profile divides the UF Time into twelve equal segments of differing UF
rates, based on the profile, in order to reach the prescribed UF Goal.
To view the available profiles, touch the UF Profile button on the “Home” screen. The “UF
Profile” subscreen will open displaying up to eight possible profiles and a selection for
“None.” The first four profiles are standard profiles. The fifth through eighth profiles are
programmable to meet the needs of the clinic.
Table 16 – The UF Profile Subscreen Buttons
Button Function
Profile 1 – Increases the UF rate for approximately the first 40% of
the treatment then gradually decreases.
Profile 2 – Aggressive level UF with a gradual decline.
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