Podcast
Questions and Answers
What is the oldest and most time consuming method of determining blood cell counts?
What is the oldest and most time consuming method of determining blood cell counts?
What is required for microscope counting of red and white cells
What is required for microscope counting of red and white cells
The hemocytometer is calibrated to hold a known volume of fluid between the cover slip and a grid etched on the slide
The hemocytometer is calibrated to hold a known volume of fluid between the cover slip and a grid etched on the slide
True
The hemocytometer is calibrated to hold an unknown volume of fluid between the cover slip and a grid etched on the slide
The hemocytometer is calibrated to hold an unknown volume of fluid between the cover slip and a grid etched on the slide
Signup and view all the answers
Microscopic counting (with hemocytometer) can also be used for counting cells in other body fluids and effusions
Microscopic counting (with hemocytometer) can also be used for counting cells in other body fluids and effusions
Signup and view all the answers
Microscopic counting (with hemocytometer) cannot be used for counting cells in other body fluids and effusions
Microscopic counting (with hemocytometer) cannot be used for counting cells in other body fluids and effusions
Signup and view all the answers
Different dilutions for red and white cell counts are necessary
Different dilutions for red and white cell counts are necessary
Signup and view all the answers
Different dilutions for red and white cell counts are not necessary
Different dilutions for red and white cell counts are not necessary
Signup and view all the answers
For white cell counts, erythrocytes are lysed
For white cell counts, erythrocytes are lysed
Signup and view all the answers
For white cell counts, erythrocytes are diluted with methanol
For white cell counts, erythrocytes are diluted with methanol
Signup and view all the answers
Which of the following provides a convenient and reproducible system of pre-measured diluents according to the Hematology book in page 9
Which of the following provides a convenient and reproducible system of pre-measured diluents according to the Hematology book in page 9
Signup and view all the answers
Red cells can be counted using a hemocytometer, but the margin
of error is high even among skilled medical technologists
Red cells can be counted using a hemocytometer, but the margin of error is high even among skilled medical technologists
Signup and view all the answers
Red cells can be counted using a hemocytometer, since the margin
of error is low even among less skilled medical technologists
Red cells can be counted using a hemocytometer, since the margin of error is low even among less skilled medical technologists
Signup and view all the answers
Red cell counts themselves offer little additional information
over the hematocrit. They are needed to calculate of red cell
indices, but manual counts are generally too variable to yield
reliable information
Red cell counts themselves offer little additional information over the hematocrit. They are needed to calculate of red cell indices, but manual counts are generally too variable to yield reliable information
Signup and view all the answers
Reticulocyte count is performed by counting at least 1,000 erythrocytes on a smear
made with supravital (new methylene blue) stained blood.
Reticulocyte count is performed by counting at least 1,000 erythrocytes on a smear made with supravital (new methylene blue) stained blood.
Signup and view all the answers
Red cell counts themselves offer a lot of additional information
over the hematocrit. Therefore they are needed to calculate of red cell
indices, and manual counts are generally expected to yield
reliable information
Red cell counts themselves offer a lot of additional information over the hematocrit. Therefore they are needed to calculate of red cell indices, and manual counts are generally expected to yield reliable information
Signup and view all the answers
Reticulocyte count is performed by counting at least 100 erythrocytes on a smear
made with supravital (old methylene blue) stained blood.
Reticulocyte count is performed by counting at least 100 erythrocytes on a smear made with supravital (old methylene blue) stained blood.
Signup and view all the answers
The absolute reticulocyte count is determined by multiplying the red cell count times the percent of reticulocytes.
The absolute reticulocyte count is determined by multiplying the red cell count times the percent of reticulocytes.
Signup and view all the answers
The absolute reticulocyte count is determined by summing the red cell count by the percent of reticulocytes.
The absolute reticulocyte count is determined by summing the red cell count by the percent of reticulocytes.
Signup and view all the answers
Differential white cell count
– The stained smear should be examined with the oil immersion lens.
Differential white cell count – The stained smear should be examined with the oil immersion lens.
Signup and view all the answers
Differential white cell count
– 100-200 white cells are characterized by type. The larger the
number counted, the smaller the margin of error
Differential white cell count – 100-200 white cells are characterized by type. The larger the number counted, the smaller the margin of error
Signup and view all the answers
Differential white cell count
– The stained smear should be examined with the high dry objective lens
Differential white cell count – The stained smear should be examined with the high dry objective lens
Signup and view all the answers
Differential white cell count
– 100-200 white cells are characterized by type. The smaller the
number counted, the smaller the margin of error
Differential white cell count – 100-200 white cells are characterized by type. The smaller the number counted, the smaller the margin of error
Signup and view all the answers
Differential white cell count
Avoid areas where cells are overlapping or distorted.
Use a consistent method to scan the slide to ensure random
sampling and avoid counting the same area twice
Differential white cell count Avoid areas where cells are overlapping or distorted. Use a consistent method to scan the slide to ensure random sampling and avoid counting the same area twice
Signup and view all the answers
Differential white cell count
Avoid areas where cells are overlapping or distorted.
Use a consistent method to scan the slide to ensure random
sampling and DO NOT avoid counting the same area twice
Differential white cell count Avoid areas where cells are overlapping or distorted. Use a consistent method to scan the slide to ensure random sampling and DO NOT avoid counting the same area twice
Signup and view all the answers
Differential white cell count
-The percent of each cell type is multiplied by the total white
cell count to determine the absolute number of each leukocyte/µl
Differential white cell count -The percent of each cell type is multiplied by the total white cell count to determine the absolute number of each leukocyte/µl
Signup and view all the answers
Differential white cell count
-The percent of each cell type is divided by the total white
cell count to determine the absolute number of each leukocyte/µl
Differential white cell count -The percent of each cell type is divided by the total white cell count to determine the absolute number of each leukocyte/µl
Signup and view all the answers
Differential white cell count
-Absolute numbers (not %) should always be used in evaluating
the hemogram.
Differential white cell count -Absolute numbers (not %) should always be used in evaluating the hemogram.
Signup and view all the answers
Differential white cell count
-Percentage (not absolute number) should always be used in evaluating
the hemogram.
Differential white cell count -Percentage (not absolute number) should always be used in evaluating the hemogram.
Signup and view all the answers
