Kleihauer–Betke test: Difference between revisions
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File:KB stain - calculation of same area 2.jpg|thumb|A third area of the same size yields a count of 108 cells, deviating 8 from 100. The standard deviation used is therefore the mean of 6 and 8, which is 7. As per the table, one more area needs to be counted. | File:KB stain - calculation of same area 2.jpg|thumb|A third area of the same size yields a count of 108 cells, deviating 8 from 100. The standard deviation used is therefore the mean of 6 and 8, which is 7. As per the table, one more area needs to be counted. | ||
File:KB stain - calculation of same area 3.jpg|The third area yields 110 cells. The average number of cells per area is now calculated as the mean of 100, 94, 108 and 110, which is 103. | File:KB stain - calculation of same area 3.jpg|The third area yields 110 cells. The average number of cells per area is now calculated as the mean of 100, 94, 108 and 110, which is 103. | ||
File:KB stain -calculation of additional areas.jpg|With an average of 103 cells per area, the number of areas needed to presumably include at least 2000 cells in our case is another 16. | |||
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The sum of all fetal RBCs in all areas in this example is | The sum of all fetal RBCs in all areas in this example is | ||