BL6 mathsy Flashcards
What is the normal range of MCH?
27-32 pico
What is the normal range of MCHC?
30-35 g/100ml or 300-350 g/l
What is the normal range of MCV?
83-96 fl
What does MCH stand for?
Mean cell haemoglobin
the average amount of Hb in a RBC
What does MCHC stand for?
Mean cell haemoglobin concentration
What does MCV stand for?
Mean cell volume
How is MCH calculated?
Hb(g) per litre of blood
/
Number of RBC per litre of blood
How is MCHC calculated?
Hb(g) per 100ml of blood
/
PCV (packed cell volume) expressed in ml per 100ml blood
What is packed cell volume?
the volume of packed red blood cells (from haematocrit) divided by the total volume of the blood sample
What is the difference between MCH and MCHC
MCH tells you the haemoglobin present in one RBC, MCHC tells you the haemoglobin present in one RBC as well as including the volume of the average amount of plasma surrounding a RBC
1) What are the units of :
a) MCHC
b) MCH
c) MCV
a) g/100ml or g/l
b) MCH expressed in pg, where p = pico (10-12
c) MCV expressed in fl, where f = femto (10-15)
1) What does a red blood cell count tell you?
2) What experiment is used to find out this info.?
1) The no. of RBC per litre
2) haemocytometer
1) What does haemoglobin conc. tell you?
2) What experiment is used to find out this info.?
1) in grams the amount of haemoglobin per litre
2) spectrophotometer (remeber this one is the coloured molecule
1) What does PCV tell you?
2) What experiment is used to find out this info.?
1) same as haematocrit, tells you the proportion of RBC in blood
2) Carry out centrifusion of blood in a heparinised cappillary tube, the measure length of tube filled with fluid and length of tube filled with red fluid,
the do shorter length divided by bigger length
What does heparinised mean?
add heparin to (blood or a container about to be filled with blood) to prevent it from coagulating