ASCP ASCP-MLT Online Practice Questions and Exam Preparation

ASCP ASCP-MLT Online Questions & Answers

• Question 91:

  Black stopper tubes are used for glucose collections. Question options:

  A. True
  B. False
  B. False

• Question 92:

  Coumarin derivatives inhibit the vitamin K dependent Factors (II, VII, X) which can be measured with the PT and monitored frequently with the INR assay.

  Hematology

  Warfarin-based (coumarin derivative) oral anti-coagulant therapy is commonly monitored with :

  A. APTT
  B. PT/INR
  C. APTT and PT
  D. Thrombin time
  D. Thrombin time

• Question 93:

  In Rouleaux, red blood cells appear as stacked coins - formation occurs as the result of elevated globulins or fibrinogen. The RBCs indicated by the arrows in this illustration are the result of:

  A. Over drying of blood smear
  B. Rouleaux formation
  C. Cold agglutinins
  D. Sickle cell anemia
  B. Rouleaux formation

• Question 94:

  S. aureus does not have capsular material as a defense mechanism. H. influenzae, K. pneumoniae, N. meningitidis, and S. pneumoniae each have capsular material use as a defense mechanism. This capsular material is an antiphagocytic

  substance which helps deter bacterial death by macrophages and other white blood cells.

  Microbiology

  Which one of the following does NOT have capsular material as a defense mechanism?

  A. H. influenzae
  B. K. pneumoniae
  C. N. meningitidis
  D. S. aureus
  E. S. pneumoniae
  E. S. pneumoniae

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  Explanation/Reference:

• Question 95:

  According to the Michaelis-Menton kinetics theory, when a reaction is performed in zero- order kinetics:

  A. The substrate concentration is very low and the reaction rate is dependent on the substrate concentration
  B. The substrate concentration is in excess and the reaction rate is dependent on the enzyme concentration
  C. The enzyme concentration is in excess and the reaction rate is dependent on the substrate concentration
  D. The substrate concentration is equal to Km and the reaction rate is dependent on the enzyme concentration
  B. The substrate concentration is in excess and the reaction rate is dependent on the enzyme concentration

• Question 96:

  A patient with tuberculosis would be placed in:

  A. protective isolation.
  B. body fluid isolation.
  C. droplet isolation.
  D. airborne isolation.
  D. airborne isolation.

• Question 97:

  Root cause analysis (RCA) is a structured study that determines the underlying causes of adverse events. RCA focuses on systems, processes, and common causes that were involved in the adverse event. It then determines ways to prevent recurrence by identifying potential improvements in systems and processes that should decrease the likelihood of repeating the event.

  Failure mode and effect analysis (FMEA) is used to evaluate a process prior to its implementation. Its purpose is to identify ways in which a process might possibly fail with the goal being to eliminate or reduce the likelihood of such a failure. Monitoring quality indicators is important in the maintenance of quality health care. Quality indicators should be identified to prevent medical errors from occurring or to prevent the recurrence of a quality issue. However, it is not the method that is used to evaluate an adverse event after it has occurred.

  A medical record audit may be a part of a root cause analysis.

  A medical event occurs that results in serious injury to a patient. All systems, processes, and common causes that were involved in the adverse event should be evaluated. A method that can be implemented to effectively study the underlying causes is known as:

  A. Failure mode and effect analysis
  B. Monitoring of quality indicators
  C. Medical record audit
  D. Root cause analysis
  D. Root cause analysis

• Question 98:

  The antiglobulin test may be omitted from the serological crossmatch if the patient's antibody screen is negative and there is no history of detection of unexpected antibodies.

  Blood Bank

  What must be true for the antiglobulin phase of the serologic crossmatch to be omitted (i.e., immediate spin crossmatch is done)? Please select all correct answers

  A. The antibody screen must be negative.
  B. The patient has not been transfused within the past 24 hours.
  C. There is no history of detection of unexpected antibodies
  D. The blood is needed for surgery
  A. The antibody screen must be negative.
  C. There is no history of detection of unexpected antibodies

• Question 99:

  In an alkaline medium, potassium ferricyanide oxidizes hemoglobin to methemoglobin. Further reaction with potassium cyanide produces cyanmethemoglobin which has a maximum absorbance at 540 nm. Color intensity is proportional to

  total hemoglobin concentration, which is how the hemoglobin levels are measured.

  Hematology

  In the hemoglobin methodology using potassium ferricyanide the following measurable reaction occurs:

  A. carboxhemoglobin is formed
  B. iron remains in the ferrous state
  C. ferrous iron is oxidized to ferric iron to form methemoglobin
  D. acid hematin is formed
  C. ferrous iron is oxidized to ferric iron to form methemoglobin

• Question 100:

  Lipids tend to form a "maltese cross" pattern when viewed in polarized light, which helps to differentiate them from other urine microscopic components. Substances found in urinary sediment that are more easily distinguished by use of polarized microscope are:

  A. WBC
  B. RBC
  C. Casts
  D. Lipids
  E. Crystals
  D. Lipids