Capintec CAPTUS 2000, Owner'S Manual

Page: 155 / 206

CAPINTEC, INC CAPTUS
®
2000
Figure 8-57
Select
OK to return to Figure 8-56 and enter the hematocrit value for the sample. If you
select Cancel from Figure 8-57, you will return to Figure 8-52, the Data Acquisition screen,
and only the EXIT button will be active. Both the background count and sample count data
will also be lost. Once the hematocrit value has been entered for the sample, Figure 8-52
will appear with only the
EXIT button active. Select EXIT to return to the patient screen,
Figure 8-47. The results for the patient’s sample will appear in the RBC Survival Test
Results box. The initial sample will be standardized to 100% survival. Select the
DONE
button to exit from the patient screen. The RBC survival data will be saved. Follow the same
counting sequence for each subsequent sample. Select the appropriate patient from patient
directory list and follow the counting prompts shown above. Each subsequent sample will be
calculated as percent left of the initial sample count, corrected for any difference in
hematocrit and radioactive decay, and the cumulative results in terms of percent remaining
are displayed in the patient result display area.
Test Results
If later samples have a hematocrit value which differs from the 24 hour sample, then a
correction is made as follows:
sample) HCT(each hours) 24 rate(at count blood whole Net
100 hours) 24 HCT(at sample) rate(each count blood whole Net
Remaining %
×
× ×
=
The software plots each value for percent remaining against time on a semi-logarithmic
scale, and calculates the best fit straight line through the data points using a least squares
linear regression fit. The results are reported in days required for 50% (default) survival.
When the individual patient results are printed, the graph of percent remaining vs. time will
also print, and calculated days for 50% survival reported.
Printing Test Results
To print an individual patient report, first select the desired patient from the patient library list.
Then choose the
PRINT button located at the bottom of the main RBC Survival Test screen.
Figure 8-58 will appear.
July 00 LAB TESTS 8-47