Microhematocrit Determination

Question 1

Blood is consists of:

Answer 1

• About 55% plasma
• About 45% of red blood cells or erythrocytes
• About 1% of white blood cells (leukocytes) and platelets (thrombocytes)

Question 2

Solid or Formed Elements

Answer 2

Red Blood Cells (RBC)
White Blood Cells (WBC)
Platelets or thrombocytes

Question 3

White blood cells has

Answer 3

▪ Granulocytes (neutrophils, eosinophils, basophils)
▪ Lymphocytes
▪ Monocytes

Question 4

Liquid or Fluid portion

Answer 4

plasma or serum

Question 5

a cloudy yellow fluid due to the presence of fibrinogen (major clotting factor) & other clotting factors

Answer 5

plasma

Question 6

a clear yellow fluid in which fibrinogen & other coagulation factors are consumed or absent

Answer 6

serum

Question 7

It is the volume of red blood cells per unit of blood volume or the percentage volume of red blood cells in a volume of whole blood

Answer 7

hematocrit

Question 8

hematocrit is also know as

Answer 8

Packed Cell Volume (PCV) or Erythrocyte Volume Fraction (EVF)

Question 9

Former Name of hematocrit

Answer 9

Packed Red Cell Volume (PRCV)

Question 10

It can become a point of reference for the capability of blood to deliver oxygen

Answer 10

hematocrit

Question 11

too low hematocrit

Answer 11

anemia
bleeding
leukemia

Question 12

too high hematocrit

Answer 12

polycythemia
heart disease
dehydration

Question 13

measurement of RBC percentage in total blood volume

Answer 13

hematocrit

Question 14

can be used to monitor interval bleeding post surgery

Answer 14

hematocrit

Question 15

reference range

Answer 15

• At birth: 45-60%
• Female: 36-48%
• Male: 40-55%

slight decrease after 50 years old

Question 16

Centrifuge is set to:

Answer 16

10,000 RPM for 5 mins

Question 17

A method that uses capillary tube for determining the hematocrit

Answer 17

microhematocrit method (adam)

Question 18

length:

Answer 18

70-75 mm

Question 19

bore:

Answer 19

1 or 1.2 mm

Question 20

Plug/Clay seal:

Answer 20

4-6 mm

Question 21

blood:

Answer 21

5 cm filled portion = 2/3 filled = 0.05 mL blood

Question 22

Red band

Answer 22

heparin: used for non-anticoagulated blood

Question 23

Blue band:

Answer 23

Non-additive (plain): for anticoagulated blood

Question 24

amount of plasma that still remains in RBC portion after the microhematocrit has been spun

Answer 24

trapped plasma

Question 25

materials used in microhematocrit

Answer 25

microhematocrit reader, microhematocrit tube, microhematocrit centrifuge, sealant

Question 26

The ______ is usually three times the _________.

Answer 26

hematocrit; hemoglobin