Hematuria Flashcards Preview

CRRAB II - Medicine > Hematuria > Flashcards

Flashcards in Hematuria Deck (19)
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0

What can cause a false negative on a urinary dipstick test?

Presence of formalin
High urinary ascorbic acid

1

What can cause a false positive on a urine dipstick test?

Alkaline urine (>9.0)
Contamination with oxidizing agents used to clean perineum

2

What level of hematuria is considered abnormal in adults? Children?

Adults: 2 RBC's / high power field
Children: 5 RBC's / high power field

3

What is the most frequent cause of hematuria?

Transient, unexplained hematuria

4

If you spin down the urine and the supernatant is red, what does that tell you?

NOT hematuria. Need to dipstick for heme.

5

What are three things that can cause red supernatant with a negative dipstick test?

Porphyria
Phenazopyridine
Beets

6

What is the chemical responsible for red urine with beets?

Betalaine

7

If somebody's urine is positive for betalaine, what could be an underlying issue?

Anemic
Achlorhydric (pernicious anemia)
Diet rich in oxalate

8

If the supernatant of urine is red and positive for dipstick iron, what is the molecule suspended in the urine?

Hemoglobin

9

If a patient has hematuria and history of upper respiratory tract infection, what is most likely the problem?

IgA nephropathy

10

If a patient has hematuria and history of pyuria and dysuria, what is most likely the problem?

Infection

11

If a patient has hematuria and history of flank pain with groin radiation, what is most likely the problem?

Nephrolithiasis

12

If a patient has hematuria and history of hesitancy and dribbling, what is most likely the problem?

Prostatism

13

If a patient has hematuria and history of cyclic hematuria, what is most likely the problem?

Endometriosis

14

If a patient has hematuria with coca cola colored urine, dysmorphic red cells, or proteinuria, is the issue glomerular or extraglomerular?

glomerular

15

If a patient has hematuria and clots in the urine, is it likely glomerular or extraglomerular?

Extraglomerular

16

What are the most common causes of microscopic hematuria in children?

Glomerulopathies
Hypercalcuria
Nutcracker syndrome

17

What is nutcracker syndrome?

Aorta or superior mesenteric compresses left renal vein (mostly asian children)

18

What level does the urine protein/creatinine ratio need to be above for a consult?

>.3