Fresenius Medical Care 2008T Operator's Manual page 279

Glossary
Pillow—Small blood reservoir on the Single Needle bloodline. It is located before the first blood pump
segment.
Positive Pressure—Condition that exists when air or fluid pressure inside the dialysate lines is greater
than outside of the lines. If an opening occurs, air or fluid will flow out of the system.
Post-Reaction Bicarbonate—The prescribed Final Dialysate bicarbonate that will be delivered to the
dialyzer in the Final Dialysate after the proportioning (mixing) of the acid concentrate, bicarbonate
concentrate, and water. The post-reaction bicarbonate value is entered on the "Dialysate" screen in the
Bicarbonate button.
Power Failure Recovery—when power to the machine is lost, many dialysis parameters are stored and
recovered when the power is restored to the machine.
Pressure Holding Test (PHT)—There are different Pressure Holding Tests. A PHT verifies the integrity
of the hydraulic system, which is necessary for accurate fluid balance and UF control. An extensive
Pressure Holding Test is available in Self Test. An Online Pressure Holding Test is done every 12
minutes during treatment. It lasts about seven seconds, depending on the dialysate flow rate (two cycles
of the balancing chamber). The online PHT must be selected in Service Mode.
Pure Ultrafiltration—A treatment option in which the ultrafiltration pump draws excess fluid off the
patient while the dialysate flow is turned off. See also Sequential Dialysis.
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Puristeril 340 A chemical used to clean and disinfect the 2008T hydraulic system.
Reverse Osmosis (RO)—A method for purifying water by forcing it through a semipermeable membrane
that prevents the passing of mineral ions.
RTD—Remaining Time on Dialysis. The amount of time remaining until the end of the treatment. RTD
is viewable in the Home screen.
Screen Access Button—Any of the eight blue buttons located in the row along the bottom of the display
screen. Selecting one of these buttons will bring up the corresponding treatment screen on the display
screen.
Sequential Dialysis—A two-stage form of dialysis treatment in which the first stage consists exclusively
of ultrafiltration. In the first stage, there is no dialysate flow while the ultrafiltration pump draws excess
fluid off the patient. After the determined amount of fluid has been drawn, the second stage, usually a
standard dialysis treatment, occurs.
Service Mode—A functional state of the 2008T hemodialysis machine that allows technicians to
calibrate the machine or program various software features and options that are only accessible in Service
Mode.
Single Needle Dialysis—This is a system with the use of two blood pumps to allow blood access to the
patient with a single needle. The pumps alternately turn on and off to pull fluid from the patient and then
return the dialyzed blood with minimal recirculation.
Short Power Down—Refers to the act of turning off the power with the Front Panel Power Key to the
machine for less than two minutes. Certain information stored in memory is only stored for up to two
minutes. After that, it is erased. (See Long Power Down and Power Failure Recovery.)
Sodium Variation System (SVS)—A program that varies the concentration of sodium in the dialysate
during treatment. Increased sodium at the onset of treatment is sometimes prescribed to prevent cramping
in the patient. Increasing sodium results in increased levels of other electrolytic constituents and a higher
level of conductivity.
2008T Machine Operator's Manual P/N 490122 Rev N 279