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1
3 methods in hemocytometry
TURBIDIMETRIC, MICROSCOPIC, AUTOMATED
2
Method in which it is simple as observation wherein the more cell there, the more it appears to its characteristics
TURBIDIMETRIC
3
A manual method, wherein sample is prepared by dilution and counting them under microscope.
MICROSCOPIC
4
It is the most routine cell-counting method in hematology laboratory
AUTOMATED
5
Method when counts exceed the linearity of an instrument or when an instrument is non-functional and there is no backup instrument, or in an extreme situation when testing is done in the field.
MANUAL
6
It is the numerical evaluation of formed elements and estimation of the number of blood cells in a known volume of blood.
HEMOCYTOMETRY
7
Estimated numbers of RBC's in uL
SEVERAL MILLIONS
8
Estimated numbers of WBC's in uL
SEVERAL THOUSANDS
9
Estimated numbers of platelets in uL
SEVERAL HUNDRED THOUSANDS
10
Too much overlapping of cells my occur and it is impossible to count them if we simply focus the blood sample into a microscope. Therefore, what method should we do to DISPERSE them?
DILUTION
11
These are used in preparation of dilution
DILUTING PIPET
12
What are the 2 types of diluting pipets
AUTOMATIC, NON AUTOMATIC
13
An automatic pipet that can be filled via capillary action. It is similar to RBC pipet however, it is attached with a scuking tube to allow entry of blood.
TRENNER
14
An automatic pipet that has a red bulb with single graduation on top of the bulb which is 101.
TRENNER
15
An automatic plastic disposable pipet that already contains the diluent inside the reservoir of the container.
UNOPETTE
16
Unopette is only available to RBC counting.
FALSE
17
Diluent of RBC in unopette
NSS
18
Diluent of WBC in unopette
ACETIC ACID
19
Diluent of platelets in unopette
AMMONIUM OXALATE
20
A non-automatic pipet that is commonly used in manual procedure.
THOMA
21
What is the usual dilution for WBC pipet
1:20
22
What is the usual dilution in RBC pipet
1:200
23
What is the usual blood volume
0.5
24
This is the highest and lowest dilution that a pipet can contain
DILUTION RANGE
25
The least volume of blood that we can add which has the highest dilution
0.1
26
The maximum amount of blood that we can add which has the lowest dilution
1
27
Recommended dilution for anticipated WBC count of 0.1-3.0
1:10
28
Recommended dilution for anticipated WBC count of 3.1-30
1:20
29
Recommended dilution for anticipated WBC count of >30
1:100
30
Recommended dilution for anticipated WBC count of 100
1:200
31
This characteristics of diluting fluid as it evaporates and it becomes concentrated causing red cells to crenate.
STABLE
32
These characteristics of diluting fluid should not distort the blood cells preventing swelling.
PRESERVATIVE ACTION
33
These characteristics of diluting fluid let cells settle faster and prevent them from moving for easier counting.
HIGH SPECIFIC GRAVITY
34
Too high specific gravity can cause
CRENATION
35
These characteristics of diluting fluid capable of maintaining the shape of the cells
BUFFER ACTION
36
Reagent that should be used in WBCs
HYPOTONIC FLUID
37
RBCs can obscure WBC count causing difficulty in counting. Therefore, hypotonic solution is needed that will not cause any changes to WBCs but it cause RBCs to
HEMOLYZE
38
Reagent used for RBCs
ISOTONIC FLUID
39
The most fragile cells which needed to maintains morphology to be able to count them
RBC
40
This serves as a guide in counting cells
HEMOCYTOMETER
41
Most commonly used hemocytomter
IMPROVED NEUBAUER
42
The space between the cover slip and ruled chamber
DEPTH
43
Most common types of hemocytometer according to rulings
FUCHS ROSENTHAL, SPEIRS LEVY, IMPROVED NEUBAUER
44
Hemocytometer ruling used in counting fewer number of cells like eosinophil and Basophil
SPEIRS LEVY
45
Most ideal diluting fluid of RBC containing Formalin and 1% of Sodium Citrate. This serves in preserving cell
FORMOL CITRATE, DACIES
46
This will make the nucleus of the WBCs more prominent as it contains Glacial Acetic acid and 1% aqueous Gentian Violet.
TURKS SOLUTION
47
The most ideal diluting fluid of WBC
1-3% ACETIC ACID
48
How many drops of blood to be discarded after dilution
2-3
49
How long for diluted sample to settle
2-10 MIN
50
What objective to be used in counting WBCs
LPO
51
What objective to be used in counting RBCs
HPO
52
What objective to be used in counting platelets
HPO
53
When counting the hemocytometer, it always starts on what part?
TOP MOST LEFT, FIRST SQUARE
54
This is the rule where all cell touching the L-shaped will be counted wherein RIGHT and LEFT most will not be counted
INVERTED L RULE
55
Which of these hemocytometers have a DEPTH of 0.2 mm
FUCHS ROSENTHAL, SPEIRS LEVY
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