Bayer HealthCare Rapidlab 800 - Manual (Page 109)

2Ć11 Operating the System
Analyzing Microsamples
Use this procedure to analyze samples when the sample volume is too small for
routine analysis. The system determines when a sample volume is too small for
routine syringe or capillary analysis and prompts you to move the sample
manually. The following table lists the minimum volumes required by each system
to analyze a sample:
Table 2Ć3.āăMinimum Sample Volumes
System Minimum Sample Volume
840, 844, 845 55
µ
L
850, 854, 855 70
µ
L
860, 864, 865 95
µ
L
When you use the Micro Sample option, you move the sample by manually turning
the sample pump. The system analyzes the sample in two stages. First, the system
analyzes pCO
2
and pO
2
, then it analyzes the remaining parameters after you move
the sample into position. Refer to Selecting Parameter Panels, page 2-29, for more
information.
NOTE: The tHb parameters are not measured when you use the Micro Sample
option on an 844, 845, 854, 855, 864, or 865.
If you want the system to analyze a different set of parameters for the sample,
press
Change Parameters to select another panel.
BIOHAZARD: Refer to Appendix A, Protecting Yourself from Biohazards, for
recommended precautions when working with biohazardous materials.
CAUTION: When using capillary tubes, insert the fire-polished end of the
capillary tube into the sample port to prevent damage to the capillary seal.
1. Prepare the sample and insert the device into the sample port.
2. Press Change Sample Type .
The Sample Type menu appears, as shown in Figure 2-6.
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