Clinical Chemistry
This analyte is the primary extracellular cation
What is sodium (Na⁺)?
This cell type is primarily responsible for phagocytosis in acute inflammation
What are neutrophils?
This staining differentiates bacteria based on cell wall structure
What is the Gram stain?
This stain colors nuclei blue and cytoplasm pink
What is Hematoxylin & Eosin (H&E)?
Universal RBC donor
What is O negative?
This interference causes falsely elevated potassium due to cell lysis
What is hemolysis?
This inclusion body is seen in G6PD deficiency
What are Heinz bodies?
This organism is oxidase-positive, non-fermenting, and produces a blue-green pigment
What is Pseudomonas aeruginosa?
Drawing above IV line causes
What is dilutional contamination?
Detects antibodies on RBCs in vivo
What is DAT?
This enzyme is most specific for myocardial injury compared to AST
What is troponin?
This index reflects average hemoglobin concentration per RBC
What is MCHC?
This test differentiates Staphylococcus aureus from other staphylococci
What is the coagulase test?
This preparation technique concentrates cells from fluid samples for analysis
What is cytocentrifugation (cytospin)?
ABO incompatibility reaction
What is acute hemolytic transfusion reaction?
This analyte is measured using the Jaffe reaction
What is creatinine?
This disorder is characterized by a JAK2 mutation and increased RBC mass
What is polycythemia vera?
This resistance mechanism involves alteration of penicillin-binding proteins
What is mecA-mediated methicillin resistance (MRSA)?
From prolonged tourniquet use
What is hemoconcentration?
Treats low fibrinogen
What is cryoprecipitate?
This hormone regulates calcium by increasing bone resorption
What is parathyroid hormone (PTH)?
This condition shows schistocytes and is associated with ADAMTS13 deficiency
What is thrombotic thrombocytopenic purpura (TTP)?
Identifies organisms via protein spectra
What is MALDI-TOF mass spectrometry?
A peripheral smear shows hypersegmented neutrophils and macro-ovalocytes. Bone marrow is hypercellular with megaloblastic changes. Lab reveals elevated homocysteine and methylmalonic acid.
What is vitamin B12 deficiency (megaloblastic anemia)?
Inconsistent ABO typing
What is ABO discrepancy?