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46 Cards in this Set
- Front
- Back
- 3rd side (hint)
The battlement scan pattern is employed in an eye-count differential examination of a wedge blood film b/c...
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Eosonophils occur more frequently in the center of the film
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The battlment scan pattern is employed in an eye-count differential exam of a wedge blood film b/c
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Eosonophils occur more frequently in the center of the film.
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cell that occurs in the center.
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RBCs that vary in size from the normal 6-8 microns are described as exibiting:
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anisocytosis
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not poikilocytosis
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mean cell volume (MCV) is calculated using the formula
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HCT X 10
________ rbc count |
deals with hct and rbc
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ON A STAINED PERIPHERAL BLOOD SMEAR, WHAT TERM DESCRIBES THE CHANGE IN SHAPE OF RBCS:
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POIKILOCYTOSIS
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NOT ANISOCYTOSIS
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SMALL LYMPHOCYTES WILL BE CONCENTRATED ON WHAT PART OF THE WEDGE SMEAR
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CENTER OF THE FILM
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SAME AS EOSONOPHILS
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AN RBC CONTAINING IRON GRANULES IS STAINED WITH PRUSSIAN BLUE, THE CELL IS A
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SIDEROCYTE
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NOT A SCHISTOCYTE BUT A
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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
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HCT
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EXCESSIVE ANTICOAGULANT CAUSES RBC SHRINKAGE RESULTING IN
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MCHC IS THE AVERAGE...
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CONCENTRATION OF HGB IN RED CELLS EXPRESSED AS A PERCENTAGE.
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MCHC IS THE RATIO OF THE ...
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WEIGHT OF HGB TO THE VOLUME OF RBC.
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MCHC CALCULATION
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HGB
_____ x 100 hct |
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IF MCHC IS LOW THIS INDICATES THE RBCS ARE...
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HYPOCHROMIC
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HAS MORE CENTRAL PALLOR.
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1;200 DILUTION OF A PT SAMPLE WAS MADE. 336 RBC WERE COUNTED IN AN AREA OF .2MM2 WHAT IS THE RBC COUNT?
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RBC COUNT =
336 x 200 x 10 = 672,000 ------- = 3.36 X 10 12TH/L .2 |
RBC COUNT =
RBC X DILUTION X DEPTH, _______________________ AREA |
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RBC COUNT FORMULA
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RBC X DILUTION X DEPTH
______________________ AREA |
THINK OF HEMACYTOMETER
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WHAT PHAGOCYTIC CELL PRODUCES LYSOZYMES THAT ARE BACTERIALCIDAL...
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NEUTROPHILS
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CAN BE SEGMENTED OR BANDS
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CORRECTED RETICULOCYTE COUNT FORMULA...
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% RETIC X HCT
_____________ 45 (AVG NML HCT) |
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A DECREASED RESULT IN AN OSMOTIC FRAGILITY TEST WOULD BE ASSOC WITH THESE TYPE OF CELLS AND CONDTION CONDITIONS
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SICKLE CELL ANEMIA
TARGET CELLS POIKILOCYTES ARE PRESENT |
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WHAT EFFECT WOULD USING BUFFER AT PH 6.0 HAVE ON A WRIGHT STAINED SMEAR?...
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WHEN THE PH IS TOO LOW <6.4, THE RBC TAKE UP MORE ACID DYE (EOSIN), BECOMING TOO PINK. lEUKOCYTES HAVE POOR NUCLEAR DETAIL.
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RBC HAVE TO COMPENSATE, TOO LITTLE BUFFER, GET SOME MORE...
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WHAT RBC INCLUSION CAN BE VISUALIZED WITH SUPRAVITAL STAIN, BUT CANNOT BE DETECTED ON A WRIGHT STAIN SMEAR?
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HEINZ BODIES
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IRREGULAR, REFRACTILE, PURPLE INCLUSIONS THAT ARE NOT VISIBLE WITH WRIGHT STAIN.
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A FALSELY ELEVATED HCT IS OBTAINED FROM USING A DEFECTIVE CENTRIFUGE. WHAT WILL BE AFFECTED.
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MCV, MCHC, RDW
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NOT MCH
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THIS REFLECTS THE VARIANCE IN SIZE OF THE RBCS..
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RDW
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FORMULA FOR MCV
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HCT X 10
-------- RBC |
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FORMULA FOR MCHC
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HGB X 100
--------- HCT |
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FORMULA FOR MCH
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HGB X 10
-------- RBC |
NOT AFFECTED BY HCT
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MILLER DISK IS AN OCULAR DEVICE USED TO FACILITATE COUNTING OF
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RETICULOCYTES
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WHAT STAIN METHOD IS USED MOST FREQUENTLY TO STAIN AND COUNT RETICS?
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SUPRAVITAL STAINING WITH METHYLENE BLUE
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NOT WRIGHT STAIN
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THE COULTER PRINCIPLE FOR CELL COUNTING IS BASED UPON
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ISOTONIC SOLUTIONS CONDUCT ELECTRICITY BETTER THAN CELLS
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A CORRECTION IS NECESSARY FOR WBC COUNTS WHEN NRBCS ARE SEEN IN THE PERIPHERAL SMEAR B/C
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NRBCS ARE COUNTED AS LEUKOCYTES.
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CORRECTED WBC COUNT
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WBC COUNT X 100
--------------- 100 + NRBC |
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COULTER RDW CORRELATES WITH THE DEGREE OF
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ANISOCYTOSIS
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SIZE VARIATION
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REFERENCE RANGE FOR RDW
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11.5%-14.5%
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OSMOTIC FRAGILITY TEST RESULT IN A PT WITH THALASSEMIA MAJOR WOULD MOST LIKELY BY
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DECREASED BC TARGET CELLS ARE SEEN AND THEY HAVE INCREASED SURFACE VOL.
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TARGET CELLS
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HYPERSPLENISM IS CHARACTERIZED BY
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LEUKOPENIA
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WHICH MORPHOLOGICAL CLASSIFICATION IS CHARACTERISTIC OF MEGALOBLASTIC ANEMIA
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MACROCYTIC, NORMOCHROMIC
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PERNICIOUS ANEMIA IS A LACK OF ?
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INTRINSIC FACTOR THAT PREVENTS VIT B12 ABSORPTION
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CHARACTERISTICS OF MEGALOBLASTIC ANEMIA
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PANCYTOPENIA
HYPERSEGMENTED NEUTROPHILS MACROCYTIC RBC DECREASE RETIC COUNT |
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A PT WITH B12 DEFICIENCY ANEMIA IS GIVEN A HI DOSE OF FOLATE. WHAT IS THE EXPECTED RESULT
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AN IMPROVEMENT IN THE HEMATOLOGICAL ABNORMALITIES.
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IMPROVEMENT IN....
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WHICH ORGAN REMOVES RBC INCLUSIONS WITHOUT DESTROYING THE CELL
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SPLEEN
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SUPREME FILTER
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MORPHOLOGICAL CHARACTERISTICS OF IRON DEFICIENCY ANEMIA INCLUDE
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MICROCYTIC,HYPOCHROMIC
PLATELETS SMALL AND INCREASED INCREASE IN TIBC INCREASE IN RBC PROTOPORPHYRIN |
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FE DEFICIENCY ANEMIA MAY BE DISTINGUISHED FROM ANEMIA OF CHRONIC INFECTIONS BY
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TIBC
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IN FE DEFICIENCY ANEMIA THE SERUM IRON LEVElS IS ___ AND THE TIBC IS ___
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DECREASED, INCREASED
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IN CHRONIC FE DEFICIENCY ANEMIA THE IRON IS
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TRAPPED IN THE RE CELLS AND ARE UNAVAILABLE TO RBCS. SERUM FE AND TIBC ARE DECREASED.
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IRON DEFICIENCY ANEMIA RBC MORPHOLOGY
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MICROCYTIC,HYPOCHROMIC
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FE DEFICIENT ANEMIA IS CAUSED BY DEFECTIVE
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HEME SYNTHESIS
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THALASSEMIA IS CAUSED BY
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DECREASED GLOBULIN CHAIN SYNTHESIS.
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STORAGE OF IRON IS USUALLY BEST DETERMINED BY
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SERUM FERRITIN LEVELS
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