Urinalysis Exam Questions and Answers with
Verified Solutions | Latest Updated 2026
First morning specimen Most concentrated, most acidic
Formed elements more stable
Random specimen Used for most routine urinalysis
Timed specimen Usually for 24 hours
Measures things with circadian variation
such as
hormones, creatinine clearance, GFR
Routine void technique Acceptable for routine urinalysis
Midstream technique Ideal, best used for urine culture
Reduces possibility of contamination
Pediatric technique Use plastic collection bags with skin
adhesive
Check every 15 minutes
Many possible sources of contamination
Suprapubic aspiration For bug cultures, especially anaerobes
Also for infants when contamination not an
option
, Routine Collection container Clear plastic, disposable, leak-proof,
50-100 mL
Midstream Collection container Disposable, sterile, individually packaged
24-hour Collection container Brown-opaque plastic, 3000 mL with
preservatives
(i.e. HCl)
Random specimen preservation Fridge up to 24 hours
Do not fridge if testing within 2 hours
(amorphous
crystals will precipitate)
24-hour specimen preservation Fridge throughout collection period
If preservatives added, no good for routine
analysis
Sediment preservative for urine Formalin
Effect on urine clarity if left out Becomes more turbid as bugs proliferate
Effect on urine pH if left out Increases as bugs decompose urea to
ammonia
Effect on urine glucose if left out Decreases as cells and bugs use it up
Verified Solutions | Latest Updated 2026
First morning specimen Most concentrated, most acidic
Formed elements more stable
Random specimen Used for most routine urinalysis
Timed specimen Usually for 24 hours
Measures things with circadian variation
such as
hormones, creatinine clearance, GFR
Routine void technique Acceptable for routine urinalysis
Midstream technique Ideal, best used for urine culture
Reduces possibility of contamination
Pediatric technique Use plastic collection bags with skin
adhesive
Check every 15 minutes
Many possible sources of contamination
Suprapubic aspiration For bug cultures, especially anaerobes
Also for infants when contamination not an
option
, Routine Collection container Clear plastic, disposable, leak-proof,
50-100 mL
Midstream Collection container Disposable, sterile, individually packaged
24-hour Collection container Brown-opaque plastic, 3000 mL with
preservatives
(i.e. HCl)
Random specimen preservation Fridge up to 24 hours
Do not fridge if testing within 2 hours
(amorphous
crystals will precipitate)
24-hour specimen preservation Fridge throughout collection period
If preservatives added, no good for routine
analysis
Sediment preservative for urine Formalin
Effect on urine clarity if left out Becomes more turbid as bugs proliferate
Effect on urine pH if left out Increases as bugs decompose urea to
ammonia
Effect on urine glucose if left out Decreases as cells and bugs use it up
