Question 1

Which of the following occurs if testing is not performed within 24 hours of specimen collection?

Accepted Answer

A) White blood count rises. 
B) WBCs deteriorate and RBCs swell. 
C) Hemoglobin rises. 
D) MCV decreases. 
A) White blood count rises. 
B) WBCs deteriorate and RBCs swell. 
C) Hemoglobin rises. 
D) MCV decreases.

Question 2

How do CELL-DYN instruments differentiate red cells and platelets from one another?

Accepted Answer

A) differences in forward scatter using optical light scatter principle 
B) use of a unique reagent that selectively lyses red cells while preserving platelets 
C) differences in volume (fL) using electrical impedance principle 
D) use of a unique reagent that selectively lyses platelets while preserving red cells 
A) differences in forward scatter using optical light scatter principle 
B) use of a unique reagent that selectively lyses red cells while preserving platelets 
C) differences in volume (fL) using electrical impedance principle 
D) use of a unique reagent that selectively lyses platelets while preserving red cells

Question 3

Which of the following is always calculated on cell counters?

Accepted Answer

A) hematocrit 
B) MCV 
C) mean cell hemoglobin concentration (MCH
C)  
D) red blood cell count 
A) hematocrit 
B) MCV 
C) mean cell hemoglobin concentration (MCH
C)  
D) red blood cell count

Question 4

Select the most appropriate action for the results in Question 18.

Accepted Answer

A) Report the results. 
B) Lyse the red cells manually and rerun. 
C) Warm sample to 37° C and rerun. 
D) Replace plasma with saline and rerun. 
A) Report the results. 
B) Lyse the red cells manually and rerun. 
C) Warm sample to 37° C and rerun. 
D) Replace plasma with saline and rerun.

Question 5

Which of the following is determined by light transmission between 525 and 555 nm on automated counting instrumentation?

Accepted Answer

A) reticulocytes 
B) hemoglobin 
C) mean cell volume (MCV) 
D) mean cell hemoglobin (MCH) 
A) reticulocytes 
B) hemoglobin 
C) mean cell volume (MCV) 
D) mean cell hemoglobin (MCH)

Exam 15: Automated Blood Cell Analysis

Which of the following occurs if testing is not performed within 24 hours of specimen collection?

How do CELL-DYN instruments differentiate red cells and platelets from one another?

Which of the following is always calculated on cell counters?

Select the most appropriate action for the results in Question 18.

Which of the following is determined by light transmission between 525 and 555 nm on automated counting instrumentation?

An Overview of Clinical Laboratory Hematology

Safety in the Hematology Laboratory

Blood Specimen Collection

Care and Use of the Microscope

Quality Assurance in Hematology and Hemostasis Testing

Cellular Structure and Function

Hematopoiesis

Erythrocyte Production and Destruction

Erythrocyte Metabolism and Membrane Structure and Function

Hemoglobin Metabolism

Iron Kinetics and Laboratory Assessment

Leukocyte Development, Kinetics, and Functions

Platelet Production, Structure, and Function

Manual, Semiautomated and Point-of-Care Testing in Hematology

Examination of the Peripheral Blood Film and Correlation with the Complete Blood Count

Bone Marrow Examination

Body Fluid Analysis in the Hematology Laboratory

Anemias: Red Blood Cell Morphology and Approach to Diagnosis

Disorders of Iron Kinetics and Heme Metabolism

Anemias Caused by Defects of DNA Metabolism

Bone Marrow Failure

Introduction to Increased Destruction of Erythrocytes

Intrinsic Defects Leading to Increased Erythrocyte Destruction

Extrinsic Defects Leading to Increased Erythrocyte Destruction Nonimmune Causes

Extrinsic Defects Leading to Increased Erythrocyte Destruction Immune Causes

Hemoglobinopathies (Structural Defects in Hemoglobin)

Thalassemias

Nonmalignant Leukocyte Disorders

Cytogenetics

Molecular Diagnostics in Hematopathology

Flow Cytometric Analysis in Hematologic Disorders

Myeloproliferative Neoplasms

Myelodysplastic Syndromes

Acute Leukemias

Mature Lymphoid Neoplasms

Normal Hemostasis and Coagulation

Hemorrhagic Disorders and Laboratory Assessment

Thrombotic Disorders and Laboratory Assessment

Thrombocytopenia and Thrombocytosis

Qualitative Disorders of Platelets and Vasculature

Laboratory Evaluation of Hemostasis

Antithrombotic Therapies and their Laboratory Assessment

Hemostasis and Coagulation Instrumentation

Pediatric and Geriatric Hematology and Hemostasis

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