HEMA MIDTERMS COMPUTATIONS Flashcards

1
Q

RBC Thoma Pipette Dilution

A

101-1/total amount of blood aspirated

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2
Q

RBC Count (1:200)

A

no. of RBC x 10,000

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3
Q

other RBC count formula

A
  1. Ave. cell # x dilution factor / area counted x chamber depth
  2. # of RBC x Area C.F x Depth C.F x Dilution C.F in 1/5 sq.mm
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4
Q

WBC count (1:20)

A

Total # of cells in all 4 squares x 50

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5
Q

OTHER formula for WBC

A

WBCs Counted x 10 x 20 / 4

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6
Q

Dameshek’s Method

A

Platelets x RBC Count / 1,000

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7
Q

Guy and Leake

A

Platelets per uL = Platelet x 5 x 10 x 100

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8
Q

Rees and Ecker Method (platelet count)

A

No. of cells x Dilution Factor x Depth Factor / Area Factor

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9
Q

Rees and Ecker Platelets/µL

A

Platelets Counted x 10 x 200 / 4

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10
Q

Brecher-Cronkite Method

A

Platelets per uL = Platelet x 5 x 10 x 100

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11
Q

Thrombocyte No. concentration

A

Platelet count x .01 = ______ x 10^9/L

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12
Q

WBC Differential Count & WBC Absolute Count

Neutrophil

A

47-49
1.8 - 7.7 x 10^9/L

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13
Q

WBC Differential Count & WBC Absolute Count

Lymphocyte

A

14-47
1 - 4.8 x 10^9/L

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14
Q

WBC Differential Count & WBC Absolute Count

Monocytes

A

2-11
0 - .8 x 10^9/L

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15
Q

WBC Differential Count & WBC Absolute Count

Eosinophils

A

0-7
0-.45 x 10^9/L

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16
Q

WBC Differential Count & WBC Absolute Count

Basophil

A

0-2
0-.30 x 10^9/L

17
Q

WBC Differential Count & WBC Absolute Count

Stab or Band cell

18
Q

Hgb Concentration in Chemical Method

A

Iron content (mg/dL) / 3.47

19
Q

Cyanmethemoglobin

A

C test / C standard= A test/ A standard or C test = C standard x A test / A standard

20
Q

Wintrobe Hematocrit (QNS)

A

L1 x 100 / L2
L1 - height of red cell column
L2 - height of entire column

21
Q

Wintrobe Hematocrit (<5mL)

A

(Vol. of pRBCs/ Vol. of whole blood used) x 100

22
Q

Haden’s Modification

A

Hct % = vol of pRBCs x 20

23
Q

Haden’s Modification (<5mL)

A

Hct % = (vol of pRBCs / vol of whole blood used) x 100

24
Q

MCV

A

MCV = Hct/RBC Countx 10

25
# * MCH
MCH = Hgb/RBC Count x 10
26
# MCH MCHC
MCHC = Hgb/Hct x 100
27
Rule of Three
Hemoglobin x 3 = Hematocrit ± 3 RBC x 3 = Hemoglobin ± 3
28
%Reticulocyte
No. of reticulocytes x 100 / 1000 ## Footnote Newborn (within 2 weeks): 2-6% Adults: 0.5-1.5%
29
Absolute Reticulocyte Count
(Reticulocytes (%)/ 100) x RBC Count x 1000 | RBC Count is in (x1012/L) format
30
Retics/mm3
(% retics / 100) x RBC count in millions
31
Reticulocyte No. Concentration
Retics/mmm3 x .001 = ___ x 10^9/L
32
Corrected Reticulocyte Count
[Reticulocytes % x Hct (%)] / Normal Hct
33
Retics/uL
Reticulocytes (%) / 100 x RBC Count
34
Reticulocyte Production Index
CRC / Maturation days of Retics in blood
35
Zeta Sedimentation Rate (ZSR)
ZSR% = (HCT (%) / Zetacrit) x 100