A hospital laboratory technician is performing routine blood analysis as part of an inpatient's assessment and is examining the sample in a test tube following processing in a centrifuge and the addition of an anticoagulant
Which of the following observations would the technician most likely interpret as an anomaly?
A)
The bottom layer of blood in the tube accounts for around one third of the total volume.
B)
The middle layer of cells appears white to gray in color.
C)
The top layer of cells is too thin to visualize without microscopy.
D)
The yellowish fluid on the top of the sample appears to constitute around one half of the total volume.
Ans:
A
Feedback:
The body layer of cells in a centrifuged blood sample consists of erythrocytes and should constitute around 42% to 47% of the total blood volume. The middle cell layer of leukocytes should appear whitish gray, and the thrombocytes above that layer are frequently not discernable. The plasma layer should account for around 55% of the total blood volume.
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