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46 Cards in this Set

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The battlement scan pattern is employed in an eye-count differential examination of a wedge blood film b/c...
Eosonophils occur more frequently in the center of the film
The battlment scan pattern is employed in an eye-count differential exam of a wedge blood film b/c
Eosonophils occur more frequently in the center of the film.
cell that occurs in the center.
RBCs that vary in size from the normal 6-8 microns are described as exibiting:
anisocytosis
not poikilocytosis
mean cell volume (MCV) is calculated using the formula
HCT X 10
________
rbc count
deals with hct and rbc
ON A STAINED PERIPHERAL BLOOD SMEAR, WHAT TERM DESCRIBES THE CHANGE IN SHAPE OF RBCS:
POIKILOCYTOSIS
NOT ANISOCYTOSIS
SMALL LYMPHOCYTES WILL BE CONCENTRATED ON WHAT PART OF THE WEDGE SMEAR
CENTER OF THE FILM
SAME AS EOSONOPHILS
AN RBC CONTAINING IRON GRANULES IS STAINED WITH PRUSSIAN BLUE, THE CELL IS A
SIDEROCYTE
NOT A SCHISTOCYTE BUT A
A 7 ML EDTA TUBE IS RECEIVED IN THE LAB CONTAINING ONLY 2 ML OF BLOOD. IF USING MANUAL TECHNIQUES, WHAT RESULT WILL BE ERRONEOUS
HCT
EXCESSIVE ANTICOAGULANT CAUSES RBC SHRINKAGE RESULTING IN
MCHC IS THE AVERAGE...
CONCENTRATION OF HGB IN RED CELLS EXPRESSED AS A PERCENTAGE.
MCHC IS THE RATIO OF THE ...
WEIGHT OF HGB TO THE VOLUME OF RBC.
MCHC CALCULATION
HGB
_____ x 100
hct
IF MCHC IS LOW THIS INDICATES THE RBCS ARE...
HYPOCHROMIC
HAS MORE CENTRAL PALLOR.
1;200 DILUTION OF A PT SAMPLE WAS MADE. 336 RBC WERE COUNTED IN AN AREA OF .2MM2 WHAT IS THE RBC COUNT?
RBC COUNT =
336 x 200 x 10 = 672,000
------- = 3.36 X 10 12TH/L
.2
RBC COUNT =
RBC X DILUTION X DEPTH,
_______________________

AREA
RBC COUNT FORMULA
RBC X DILUTION X DEPTH
______________________
AREA
THINK OF HEMACYTOMETER
WHAT PHAGOCYTIC CELL PRODUCES LYSOZYMES THAT ARE BACTERIALCIDAL...
NEUTROPHILS
CAN BE SEGMENTED OR BANDS
CORRECTED RETICULOCYTE COUNT FORMULA...
% RETIC X HCT
_____________
45 (AVG NML HCT)
A DECREASED RESULT IN AN OSMOTIC FRAGILITY TEST WOULD BE ASSOC WITH THESE TYPE OF CELLS AND CONDTION CONDITIONS
SICKLE CELL ANEMIA
TARGET CELLS
POIKILOCYTES ARE PRESENT
WHAT EFFECT WOULD USING BUFFER AT PH 6.0 HAVE ON A WRIGHT STAINED SMEAR?...
WHEN THE PH IS TOO LOW <6.4, THE RBC TAKE UP MORE ACID DYE (EOSIN), BECOMING TOO PINK. lEUKOCYTES HAVE POOR NUCLEAR DETAIL.
RBC HAVE TO COMPENSATE, TOO LITTLE BUFFER, GET SOME MORE...
WHAT RBC INCLUSION CAN BE VISUALIZED WITH SUPRAVITAL STAIN, BUT CANNOT BE DETECTED ON A WRIGHT STAIN SMEAR?
HEINZ BODIES
IRREGULAR, REFRACTILE, PURPLE INCLUSIONS THAT ARE NOT VISIBLE WITH WRIGHT STAIN.
A FALSELY ELEVATED HCT IS OBTAINED FROM USING A DEFECTIVE CENTRIFUGE. WHAT WILL BE AFFECTED.
MCV, MCHC, RDW
NOT MCH
THIS REFLECTS THE VARIANCE IN SIZE OF THE RBCS..
RDW
FORMULA FOR MCV
HCT X 10
--------
RBC
FORMULA FOR MCHC
HGB X 100
---------
HCT
FORMULA FOR MCH
HGB X 10
--------
RBC
NOT AFFECTED BY HCT
MILLER DISK IS AN OCULAR DEVICE USED TO FACILITATE COUNTING OF
RETICULOCYTES
WHAT STAIN METHOD IS USED MOST FREQUENTLY TO STAIN AND COUNT RETICS?
SUPRAVITAL STAINING WITH METHYLENE BLUE
NOT WRIGHT STAIN
THE COULTER PRINCIPLE FOR CELL COUNTING IS BASED UPON
ISOTONIC SOLUTIONS CONDUCT ELECTRICITY BETTER THAN CELLS
A CORRECTION IS NECESSARY FOR WBC COUNTS WHEN NRBCS ARE SEEN IN THE PERIPHERAL SMEAR B/C
NRBCS ARE COUNTED AS LEUKOCYTES.
CORRECTED WBC COUNT
WBC COUNT X 100
---------------
100 + NRBC
COULTER RDW CORRELATES WITH THE DEGREE OF
ANISOCYTOSIS
SIZE VARIATION
REFERENCE RANGE FOR RDW
11.5%-14.5%
OSMOTIC FRAGILITY TEST RESULT IN A PT WITH THALASSEMIA MAJOR WOULD MOST LIKELY BY
DECREASED BC TARGET CELLS ARE SEEN AND THEY HAVE INCREASED SURFACE VOL.
TARGET CELLS
HYPERSPLENISM IS CHARACTERIZED BY
LEUKOPENIA
WHICH MORPHOLOGICAL CLASSIFICATION IS CHARACTERISTIC OF MEGALOBLASTIC ANEMIA
MACROCYTIC, NORMOCHROMIC
PERNICIOUS ANEMIA IS A LACK OF ?
INTRINSIC FACTOR THAT PREVENTS VIT B12 ABSORPTION
CHARACTERISTICS OF MEGALOBLASTIC ANEMIA
PANCYTOPENIA
HYPERSEGMENTED NEUTROPHILS
MACROCYTIC RBC
DECREASE RETIC COUNT
A PT WITH B12 DEFICIENCY ANEMIA IS GIVEN A HI DOSE OF FOLATE. WHAT IS THE EXPECTED RESULT
AN IMPROVEMENT IN THE HEMATOLOGICAL ABNORMALITIES.
IMPROVEMENT IN....
WHICH ORGAN REMOVES RBC INCLUSIONS WITHOUT DESTROYING THE CELL
SPLEEN
SUPREME FILTER
MORPHOLOGICAL CHARACTERISTICS OF IRON DEFICIENCY ANEMIA INCLUDE
MICROCYTIC,HYPOCHROMIC
PLATELETS SMALL AND INCREASED
INCREASE IN TIBC
INCREASE IN RBC PROTOPORPHYRIN
FE DEFICIENCY ANEMIA MAY BE DISTINGUISHED FROM ANEMIA OF CHRONIC INFECTIONS BY
TIBC
IN FE DEFICIENCY ANEMIA THE SERUM IRON LEVElS IS ___ AND THE TIBC IS ___
DECREASED, INCREASED
IN CHRONIC FE DEFICIENCY ANEMIA THE IRON IS
TRAPPED IN THE RE CELLS AND ARE UNAVAILABLE TO RBCS. SERUM FE AND TIBC ARE DECREASED.
IRON DEFICIENCY ANEMIA RBC MORPHOLOGY
MICROCYTIC,HYPOCHROMIC
FE DEFICIENT ANEMIA IS CAUSED BY DEFECTIVE
HEME SYNTHESIS
THALASSEMIA IS CAUSED BY
DECREASED GLOBULIN CHAIN SYNTHESIS.
STORAGE OF IRON IS USUALLY BEST DETERMINED BY
SERUM FERRITIN LEVELS