7.
Which microhematocrit principle is correct?
a. A capillary tube is filled with plasma by capillary action to within 1 to 2 cm of
the end. The unfilled end is sealed and the tube is centrifuged. After
centrifugation, the capillary tube is placed in a reading device and the
hematocrit value determined.
b. A capillary tube is filled with whole blood by capillary action to within 1 to 2 cm
of the end. The unfilled end is sealed and the tube is centrifuged. After
centrifugation, the capillary tube is placed in a reading device and the
hematocrit value determined.
c.
A capillary tube is filled with whole blood by capillary action to within 2 to 4 cm
of the end. The unfilled end is sealed and the tube is centrifuged. After
centrifugation, the capillary tube is placed in a reading device and the
hematocrit value determined.
d. A capillary tube is filled with whole blood by capillary action to within 1 to 2 cm
of the end. The filled end is sealed and the tube is centrifuged. After
centrifugation, the capillary tube is read and recorded.
8.
Centrifugation for the microhematocrit lasts:
a. 30 seconds.
b. 30 minutes.
c.
1 minute.
d. 5 minutes.
9.
During the microhematocrit test, blood without anticoagulant is identified by a
heparinized capillary tube with a ___________________ line.
a. Green.
b. Red.
c.
Yellow.
d. Pink.
MD0853
6-18