Heamatology Flashcards
How can the RBC and Hb of a newborn high?
This happens when cord clamping is delayed and blood from the placenta and umbilical artery re-enters the infant’s circulation.
How can haemoglobin be measured?
Hb can be estimated by a measurement of its colour, by determination of its power to combine with oxygen or carbon monoxide or by analysis of its iron content.
Why is there a decrease in Hb, Hct and RBC during normal pregnancy?
During normal pregnancy, there is an increase in erythropoietic activity and an increase in plasma volume, causing the red cell indices to decrease.
What are the factors that contribute to lower Hb in the elderly?
Renal insufficiency, inflammation, testosterone deficiency, diminished erythropoiesis, stem cell proliferative decline and myelodysplasia.
What are the factors that contribute to lower Hb in the elderly?
Renal insufficiency, inflammation, testosterone deficiency, diminished erythropoiesis, stem cell proliferative decline and myelodysplasia.
What are the factors that contribute to lower Hb in the elderly?
Renal insufficiency, inflammation, testosterone deficiency, diminished erythropoiesis, stem cell proliferative decline and myelodysplasia.
What is the recommended method to determine haemoglobin concentration in blood?
Haemiglobincyanide method
How to calculate haemoglobin concentration?
Hb (g/L) = (absorbance test sample/absorbance of standard) * concentration of standard * (dilution factor/1000)
How to calculate haemoglobin concentration?
Hb (g/L) = (absorbance test sample/absorbance of standard) * concentration of standard * (dilution factor/1000)
How to calculate haemoglobin concentration?
Hb (g/L) = (absorbance test sample/absorbance of standard) * concentration of standard * (dilution factor/1000)
What are the main advantages of using HbCN method to determine haemoglobin concentration?
It allows direct comparison with reference standards. All forms of haemoglobin except SHb are readily converted to HiCN.
What are the stains that react with reticulocyte?
Azure B, Brilliant cresyl blue and new methylene blue
How can you differentiate between the most immature reticulocyte and the least immature ones?
The most immature reticulocytes have the largest amount of precipitation material as compared to the least immature ones.
How can you differentiate between the most immature reticulocyte and the least immature ones?
The most immature reticulocytes have the largest amount of precipitation material as compared to the least immature ones.
How many groups are reticulocytes divided?
Four groups ranging from group I (most immature) to group IV (most mature)
