Hematology

• Insufficient centrifugation will result in: A false increase in hematocrit (Hct) value.
• Variation in red cell size observed on the

  peripheral smear is described as: Anisocytosis
• Which of the following is the preferable site for

  bone marrow aspiration and biopsy in an adult: Iliac crest
• Mean cell volume (MCV) is calculated using the

  following formula: (Hct ÷ RBC) × 10
• What term describes the change in shape of

  erythrocytes seen on a Wright’s-stained peripheral

  blood smear: Poikilocytosis
• Calculate the mean cell hemoglobin concentration

  (MCHC) using the following values:

  Hgb: 15 g/dL (150 g/L) Hct: 47 mL/dL (0.47)

  RBC: 4.50 × 106/μL (4.50 × 1012/L):31.9% (.319)
• If a patient has a reticulocyte count of 7% and an Hct of 20%, what is the corrected reticulocyte count? 3.1%
• A decreased osmotic fragility test would be

  associated with which of the following conditions? Sickle cell anemia
• What effect would using a buffer at pH 6.0 have

  on a Wright’s-stained smear? Red cells would be stained too pink
• Which of the following erythrocyte inclusions can

  be visualized with supravital stain but cannot be

  detected on a Wright’s-stained blood smear? Heinz bodies
• A falsely elevated Hct is obtained. Which of the

  following calculated values will not be affected? MCH
• A Miller disk is an ocular device used to facilitate

  counting of: Reticulocytes
• SITUATION: RBC indices obtained on an anemic

  patient are as follows: MCV 88 μm3 (fL); MCH

  30 pg; MCHC 34% (.340). The RBCs on the

  peripheral smear would appear: Normocytic, normochromic
• All of the following factors may influence the

  erythrocyte sedimentation rate (ESR) except:

  
  

  A. Blood drawn into a sodium citrate tube

  B. Anisocytosis, poikilocytosis

  C. Plasma proteins

  D. Caliber of the tube
• What staining method is used most frequently to

  stain and manually count reticulocytes?

  Supravital Staining