Siemens DCA Vantage Operator's Manual page 66

Filling the Capillary Tube with Urine from a Container with a Small Sample
Volume
If the urine sample was refrigerated, allow the sample to come to room
temperature before running any tests. Mix the urine specimen thoroughly
before use.
1. Immerse the tip of the capillary tube in the thoroughly mixed urine sample.
40 µL is required to fill the capillary.
NOTE:
2. Tilt the sample container and the capillary holder to a more horizontal
position to increase the rate of flow into the capillary.
Take care not to spill the urine sample.
3. Allow enough time for the urine specimen to flow into the capillary tube and
come in contact with the starch plug.
Wetting the starch plug seals the capillary tube and keeps the urine within
the tube.
4. Remove the capillary tube from the urine specimen.
If the urine flows back down the tube, r-immerse the capillary tube in the
urine specimen again, and allow enough time to ensure that the starch
plug becomes saturated.
5. Using a lint-free tissue, carefully wipe the outside of the glass capillary
tube.
Figure 19 Wiping the Outside of the Glass Capillary Tube
Do not allow the tissue to touch the open end of the glass capillary.
NOTE:
Contact with the open end of the capillary tube could result in loss of sample
(by wicking into the tissue). If sample loss is obvious, discard the capillary
holder; then repeat the procedure using a new capillary holder.
66 DCA Vantage Operator's Guide