CBC Expt - phyana lab Flashcards
Universal precaution
Treat all body fluids infectious
Tests in CBC
Hemoglobin measurement Hematocrit measurement RBC count WBC count Differential Count
MEASURES Volume of packed red cell after centrifugation
HEMATOCRIT measurement
METHOD IN hematocrit measurement
Adam’s micromethod
materials in hematocrit measurement
capillary tube (red, blue) sealing clay/paraffin wax microhematocrit centrifuge machine microhematocrit reader
Procedure in hematocrit measurement
Fill capillary tube with blood (3/4) Seal. Label Centrifugate. Use balancer Spin 10,000 rpm 4-5min
in hematocrit measurement, spin at what rpm and how many min
10,000 rpm 4-5min
Hematocrit NT
male- 47 +/- 7 vol% / 0.47 +/- 7 female- 42 +/- 5 vol%
Methods for hemoglobin measurement
acid-hematin method Cyanmethemoglobin method
Method for hemoglobin measurement that gives less error
Cyanmethemoglobin method
MATERIALS FOR hemoglobin measurement
0.01 N HCl Sahli’s tube (w/comparator block) Sahli’s pipette dH20 Stirring rod
PROCEDURE FOR hemoglobin measurement
Deliver 0.01N HCl into Sahli’s tube – 2mark Aspirate 0.02 mL blood Expel blood into Sahli’s tube Rinse pipette with dH20-add into the tube Add dH20 drop by drop – comparator block Read lower miniscus
NR hemoglobin measurement
NR: male : 14-16.5 g/100mL or 14-16.5g% 140-165 g/L female: 12-15g/100mL
Used in counting RBC, WBC, Platelet, absolute eosinophil count, sperm count With thick cover slip Improved Neubauer Counting Chamber
hemacytometer
specific hemacytometer in the lab
Improved Neubauer Counting Chamber