Complete Blood Count

Aka: Complete Blood Count, CBC

advertisement

II. Efficacy

  1. Complete Blood Count is over-utilized in acute infectious illness
    1. Does not distinguish Sepsis, Septic Joint, Bacterial Meningitis, Appendicitis, Diverticulitis, occult Bacterial Infection
    2. CBC is the “Last Bastion of the Intellectually Destitute” (Amal Mattu)
  2. References
    1. Cruz (2017) JAMA Pediatr 171(11):e172927 +PMID: 28892537 [PubMed]
    2. Pediatric EM Morsels (Fox)
      1. https://pedemmorsels.com/wbc-count-fever/

III. Physiology

  1. See Bone Marrow
  2. Bone Marrow produces stem cell lines
    1. Images
      1. HemeBloodCellOrigin.jpg
    2. Myeloid lines
      1. Erythroblasts (develop into erythrocytes)
      2. Myeloblasts (develop into Granulocytes)
      3. Megakaryocyte (develop into Platelets)
    3. Lymphocytic lines
      1. Lymphoblasts (develop into Lymphocytes)

IV. Technique: Specimen

  1. Specimen rejected if clotted
    1. Immediately mix specimen 10 times by gently inversion
  2. Tube type: Lavender or Purple Top
  3. Volume
    1. Adults: 3 ml (1 ml minimum)
    2. Children: 1 ml (0.3 ml in pediatric micro-container)

V. Lab: Components

  1. White Blood Cell Count
    1. Neutrophil Count
    2. Lymphocyte Count
    3. Eosinophil Count
    4. Basophil Count
    5. Monocyte Count
  2. Red Blood Cell Count
  3. Hemoglobin
  4. Hematocrit
  5. Erythrocyte Indices
    1. Mean Corpuscular Volume
    2. Mean Corpuscular Hemoglobin Concentration (MCHC)
    3. Mean Corpuscular Hemoglobin
  6. Red Cell Distribution Width
  7. Platelet Count

Images: Related links to external sites (from Bing)

These images are a random sampling from a Bing search on the term "Complete Blood Count." Click on the image (or right click) to open the source website in a new browser window. Search Bing for all related images

Related Studies

Related Topics in Pathology and Laboratory Medicine

advertisement