Question 1

What does the pneumatic system of cell counters do?

Accepted Answer

A)  Operates the valves and moves the sample 
B)  Controls computer software 
C)  Digitizes the pulses generated by cell passage 
D)  Controls the laser light 
A)  Operates the valves and moves the sample 
B)  Controls computer software 
C)  Digitizes the pulses generated by cell passage 
D)  Controls the laser light

Question 2

How do Beckman Coulter and Abbott instruments count red cells and platelets?

Accepted Answer

A)  Florescent staining and enumeration 
B)  Survival staining and conductivity 
C)  Optical scatter 
D)  Electrical impedance 
A)  Florescent staining and enumeration 
B)  Survival staining and conductivity 
C)  Optical scatter 
D)  Electrical impedance

Question 3

Platelet volume normally:

Accepted Answer

A)  Is 15 to 20 fL 
B)  Increases as the sample sits in ethylenediaminetetraacetic acid (EDT
A)  
C)  Is 5 to 18 fL 
D)  Is not reliable on most electronic instruments 
A)  Is 15 to 20 fL 
B)  Increases as the sample sits in ethylenediaminetetraacetic acid (EDT
A)  
C)  Is 5 to 18 fL 
D)  Is not reliable on most electronic instruments

Question 4

A patient's white blood count comes off an automated cell counter as 380 * 109/L. Which of the following could be reported without any additional testing?

Accepted Answer

A)  Red blood count 
B)  Hemoglobin 
C)  Hematocrit 
D)  Platelet count 
A)  Red blood count 
B)  Hemoglobin 
C)  Hematocrit 
D)  Platelet count

Question 5

An automated hematology analyzer is used to evaluate a blood specimen. Which of the following, coming off the instrument, would require performance of a manual white cell differential as opposed to blood film review?

Accepted Answer

A)  Flagged data 
B)  Suppression of automated differential data 
C)  Abnormal red cell indices 
D)  A slightly elevated platelet count 
A)  Flagged data 
B)  Suppression of automated differential data 
C)  Abnormal red cell indices 
D)  A slightly elevated platelet count

Question 6

Forward light scatter, when used in an instrument using the optical scatter principle, correlates with cell:

Accepted Answer

A)  Granules 
B)  Size 
C)  Nuclear chromatin 
D)  Number 
A)  Granules 
B)  Size 
C)  Nuclear chromatin 
D)  Number

Exam 39: Automated Cell-Counting Instrumentation

What does the pneumatic system of cell counters do?

How do Beckman Coulter and Abbott instruments count red cells and platelets?

Platelet volume normally:

A patient's white blood count comes off an automated cell counter as 380 * 109/L. Which of the following could be reported without any additional testing?

An automated hematology analyzer is used to evaluate a blood specimen. Which of the following, coming off the instrument, would require performance of a manual white cell differential as opposed to blood film review?

Forward light scatter, when used in an instrument using the optical scatter principle, correlates with cell:

An Overview of Clinical Laboratory Hematology

Safety in the Hematology Laboratory

Specimen Collection

Care and Use of the Microscope

Quality Assurance in Hematology and Hemostasis Testing

Cellular Structure and Function

Hematopoiesis

Erythrocyte Production and Destruction

Energy Metabolism and Membrane Physiology of the Erythrocyte

Hemoglobin Metabolism

Iron Metabolism

Leukocyte Development, Kinetics, and Functions

Platelet Production, Structure, and Function

Routine and Point-Of-Care Testing in Hematology: Manual and Semiautomated Methods

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

Bone Marrow Examination

Body Fluids in the Hematology Laboratory

Anemias: Red Blood Cell Morphology and Approach to Diagnosis

Disorders of Iron 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 Erythrocytedestructionnonimmune Causes

Extrinsic Defects Leading to Increased Erythrocytedestructionimmune Causes

Hemoglobinopathies Structural Defects in Hemoglobin

Thalassemias

Nonmalignant Leukocyte Disorders

Introduction to Leukocyte Neoplasms

Cytochemistry

Cytogenetics

Molecular Diagnostics in the Clinical Laboratory

Flow Cytometric Analysis in Hematologic Disorders

Myeloproliferative Neoplasms

Myelodysplastic Syndromes

Acute Leukemias

Mature Lymphoid Neoplasms

Pediatric and Geriatric Hematology

Normal Hemostasis and Coagulation

Hemorrhagic Coagulation Disorders

Thrombosis Risk Testing

Thrombocytopenia and Thrombocytosis

Qualitative Disorders of Platelets and Vasculature

Laboratory Evaluation of Hemostasis

Monitoring Antithrombotic Therapies

Coagulation Instrumentation

Filters

A patient's white blood count comes off an automated cell counter as 380 * 10⁹/L. Which of the following could be reported without any additional testing?