RR Mechatronics STARRSED RS, User Manual

Page: 121 / 259

9.5 - Reporting range
The reporting range in the columns 2, 3 and 4 are in millimeters. The start of the measure range is at the
top of the meniscus down to 140 mm. If the detection of cells/plasma is over 140 mm then the report will be
>140.
9.5.1 - Reporting range minumum value
The minimum reported ESR60 is set on 1 mm as default if the 60-minute method is used.
When the 30-minute method is used the minimum reported value is also 1 mm but then as ESR30 result.
The ESR60 result is therefore automatically calculated to a result of 2 mm.
9.6 - Aspect Hazy
The automatic reading of the Westergren sedimentation pipettes is performed by moving an optical sensor
along the pipettes. While the sensor is moving, it is taking a reading every 0.25 mm. The sensor is reading
the absorption of infrared light through the Westergren pipette filled with blood. From these readings, values
at a number of absorption levels are determined. All absorption figures are relative to the darkest and
lightest reading (darkest = 100 % and the lightest = 0 % absorption respectively).
By definition the levels are:
87.5% Cells/ plasma separation
75.0% Hazy detection
50.0% Meniscus detection
Graphic showing typical absorption values of a sample
The 'sedimentation' value is the distance in millimeters between the cells/plasma level (87.5% absorption)
and the meniscus. If there is no haze, the absorption drops quickly to a value below the 75% level. If the
distance between the 87.5% and the 75% level is less then 3mm, the report will state 'CLEAR'. If the
distance between 87.5% and 75% level is more than 3mm then the report will state 'HAZY'.
Reporting
MRN-071-2-EN version 7.02 Starrsed RS
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