Flashcards in Hematuria Deck (19)
What can cause a false negative on a urinary dipstick test?
Presence of formalin
High urinary ascorbic acid
What can cause a false positive on a urine dipstick test?
Alkaline urine (>9.0)
Contamination with oxidizing agents used to clean perineum
What level of hematuria is considered abnormal in adults? Children?
Adults: 2 RBC's / high power field
Children: 5 RBC's / high power field
What is the most frequent cause of hematuria?
Transient, unexplained hematuria
If you spin down the urine and the supernatant is red, what does that tell you?
NOT hematuria. Need to dipstick for heme.
What are three things that can cause red supernatant with a negative dipstick test?
What is the chemical responsible for red urine with beets?
If somebody's urine is positive for betalaine, what could be an underlying issue?
Achlorhydric (pernicious anemia)
Diet rich in oxalate
If the supernatant of urine is red and positive for dipstick iron, what is the molecule suspended in the urine?
If a patient has hematuria and history of upper respiratory tract infection, what is most likely the problem?
If a patient has hematuria and history of pyuria and dysuria, what is most likely the problem?
If a patient has hematuria and history of flank pain with groin radiation, what is most likely the problem?
If a patient has hematuria and history of hesitancy and dribbling, what is most likely the problem?
If a patient has hematuria and history of cyclic hematuria, what is most likely the problem?
If a patient has hematuria with coca cola colored urine, dysmorphic red cells, or proteinuria, is the issue glomerular or extraglomerular?
If a patient has hematuria and clots in the urine, is it likely glomerular or extraglomerular?
What are the most common causes of microscopic hematuria in children?
What is nutcracker syndrome?
Aorta or superior mesenteric compresses left renal vein (mostly asian children)