Roche Diagnostics May 2009
E-4 Service Manual · Version 9.0
Glossary cobas b 221 system
Electrodes -MSS
Electrodes The electrodes are flow-through electrodes
with a visible sample channel.
Electrode simulator Tes t d e v i ce fo r t h e Mea su r in g
chamber.
Fill port The fill port allows injection or aspiration of
samples from syringes, the Roche MICROSAMPLER,
capillaries and ampoule adapters.
FMS Fluid mixing system. This system, together with
the main pump ensures the correct mixture of calibration
solutions CAL A and CAL B from the S2 Fluid Pack for
subsequent calibrations using the valves VM and V19.
Glass tube see Sample inlet path
Hematokrit Abbr. Hct. The Hct is the cellular volume
portion of the blood, which is occupied by the red blood
cells, in relation to the volume of the whole blood.
Hemoglobin Hemoglobin is the main component of
erythrocytes. It serves as the vehicle for transportation of
oxygen within the bloodstream.
Hemolyzer In the hemolyzer, the sample is exposed to a
strong ultrasonic field. The erythrocytes burst, releasing
the hemoglobin.
Heparin salts Are the only clot inhibitors that may be
used for analyses in the cobas b 221 system.
Input unit The sample insertion as well as the
aspiration of solutions is carried out via input unit which
consists of the T&D module and the sample drip tray.
ISE abbr. for ion sensitive electrodes
ISE measuring chamber The ISE measuring
chamber and its sensors are used to measure the
hematocrit value and the electrolyte values Na
+
, K
+
, Ca
2+
and Cl
–
.
Levey-Jennings graph QC statistics report.
LF abbr. (german) for conductivity
Linear bracket White plastic part of the peristaltic
pump.
Locking lever This lever fixes the electrodes in the
measuring chamber.
Measurement evaluation The validity of the test
results from the instrument must be carefully examined
by a clinical-medical specialist who will take the patient's
clinical condition into consideration before any clinical
decisions are reached based on the test results.
Measuring chamber Underneath the top cover are
the BG and, depending on the configuration, the ISE
measuring chamber with the electrodes and the MSS
measuring chamber with the MSS cassette.
Measuring chamber cartridge The MC cartridge is
used to transport the samples and calibration solutions to
the wastewater system after measurement or calibration
and also feeds in the reference solution and S1 Rinse
Solution.
MC abbr. for "measuring chamber"
Module stop The error creates a message in the error
window (upper right hand corner) on the display screen.
This error is not a system stop. These errors identify
individual issues affecting only a specific module of the
analyzer and not the entire analyzer operation.
MSS cassette The MSS cartridge is a multiparameter
sensor, which contains the spots of the displayed
parameters.
MSS measuring chamber The MSS measuring
chamber and its sensors are used to measure glucose,
lactate and urea/BUN.
MSS abbr. for "metabolite sensitive sensor"
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