Laboratory Techniques and Diagnostic Procedures Flashcards
6 cards from real CVA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Laboratory Techniques and Diagnostic Procedures flashcards as text
What are the three components of a complete urinalysis and in what order?
Answer: Physical examination (color, clarity, SG), chemical analysis (dipstick), and microscopic sediment examination
A complete urinalysis includes physical examination, chemical analysis via dipstick, and microscopic sediment examination after centrifugation, in that order.
What is a Wood's lamp examination used for in veterinary dermatology?
Answer: Screening for ringworm, as some Microsporum canis strains fluoresce apple-green under UV light
About 50% of M. canis strains produce a metabolite that fluoresces apple-green under UV light at 365 nm, allowing rapid screening.
How does a centrifuge work and why is it essential in veterinary laboratories?
Answer: It uses rapid spinning to separate components by density
A centrifuge applies centrifugal force to separate fluid components by density, with heavier components moving to the bottom.
What is the difference between sensitivity and specificity of a diagnostic test?
Answer: Sensitivity measures ability to correctly identify positive cases; specificity measures ability to correctly identify negative cases
Sensitivity is the true positive rate. Specificity is the true negative rate. High sensitivity is good for screening; high specificity is good for confirmation.
What does cytology involve, and when is fine-needle aspirate (FNA) performed?
Answer: Cytology is microscopic examination of individual cells; FNA collects cells from masses or organs using a needle for rapid evaluation
Cytology examines individual cells microscopically, and FNA is a minimally invasive technique providing rapid diagnostic information about lesions.
What quality control measures should be performed daily in a veterinary lab?
Answer: Run known control samples, calibrate equipment, document results, and verify controls are within range before patient testing
Daily QC includes running manufacturer-provided controls at normal and abnormal levels and verifying results fall within acceptable ranges before processing patient samples.