loose clusters of small spherical microconidia, positive urease - ANSWER-Trichophyton mentagrophytes
BHCG tumor marker - ANSWER-chorocarcinoma
5HIAA - ANSWER-carcinoid tumors
Proteus vulgaris vs P. mirabilis indole test - ANSWER-P. vulgaris is indole pos. P. mirabilis is indole neg
Hydatid cyst fluid - ANSWER-used to neutralize Anti-P1 antibody
Antacid overdose - ANSWER-Check pH
Prolonged PT, PTT, and thrombin after collecting from catheter - ANSWER-heparin contamination
mixing study that was performed with a prolonged PTT that couldn't be corrected - ANSWER-DRVVT
(Dilute Russell Viper Venom Test)
two pt's ran in duplicate (PT and PTT). The PTT seemed to always be prolonged but PT looked ok -
ANSWER-check the CaCl/phospholipid reagent delivery
Patient is on coumadin therapy, what will be affected - ANSWER-Decreased protein C
Lots of stomatocytes - ANSWER-Liver disease
, Burr cells - ANSWER-Uremia
Picture of target cells with hemoglobin C crystals. The white count was high on instrument 1, so a second
instrument was used with a stronger lysing agent, and the white count was corrected - ANSWER-anti-
lysing target cells are what increased the white count? Erythrocytes containing hemoglobin C do not lyse
normally (sickle cell diseases)
A sodium citrate tube was drawn for a HCT on a pt but the hematocrit was abnormal - ANSWER-recollect
with decreased anticoagulant. high hct (>55%) causes low plasma so you need less anticoagulant
Question that gives a red blood cells count, HGB, and HCT. I did the rule of 3 and found that the HGB
didn't meet the rule of 3 because it was too high - ANSWER-check for lipemia (elevates HGB)
PBS with an elevated reticulocyte count and howell jolly bodies in the RBC's - ANSWER-Prussian blue for
howell jolly bodies made of iron. Prussian blue stain, which is not taken up by reticulocytes, is helpful in
differentiating the two.
what RBC inclusion is composed of DNA? - ANSWER-howell jolly bodies
what falsely increases ESR - ANSWER-vibration, tilting of tube, higher temps, >1 hr test time, improper
mixing of blood, improper dilution
Factors increasing ESR - ANSWER-Anemia, Macrocytosis, Female gender, Age >50 years, Obesity,
Pregnancy, Hypercholesterolemia, cancer, multiple myeloma, rouleaux, infections, inflammation
what falsely decreases ESR - ANSWER-low blood/ room temps, air bubbles, tests <1 hr, improper mixing
of blood, improper dilution
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