PHYSICAL EXAMINATION OF URINE Flashcards
memorization
Normal volume range (24 hours)
600 to 2,000 mL (0.6 to 2 L)
Average volume range (24 hours)
1,200 to 1,600 mL (1.2 to 1.6 L)
Night urine output
<400 mL
Day:Night ratio
2-3:1
Container capacity (UA)
50 mL
The volume required for routine UA
10 - 15 mL (Average: 12 mL)
Increased urine volume
Polyuria
Volume considered to be polyuria
> 2,000 mL/24 hours (in adults - Henry)
2.5 L/Day (in adults - Strasinger)
2.5 - 3.0 mL/kg/day (in children)
Decreased urine volume
Oliguria
Volume considered to be oliguria
<500 mL/24 hours (in adults - Henry)
<400 mL/Day (in adults - Strasinger)
<1 mL/kg/hr (in infants)
<0.5 mL/kg/hr (in children)
Complete cessation of urine flow
Anuria
Volume considered to be anuria
<100 mL/24 hours (Graff)
Excretion of more than 500 mL of urine at night
Nocturia
Any increase in urine excretion
Diuresis
Difference of polyuria in Diabetes Insipidus and Diabetes mellitus
Diabetes insipidus - low specific gravity
Diabetes mellitus - high specific gravity
Roiugh indicator of the degree of hydration; should correlate with urine S.G.
Urine color
Best way to examine urine color:
- Examine the specimen under a good light source
- Look down through the container against a white background
Major pigment of urine
Urochrome
Derived form melanin metabolism; May deposit in amorphous urates and uric acid crystals; gives the urine a pink color
Uroerythrin
Dark yellow/ orange-brown; derived from oxidation of colorless urobilinogen; Present in old specimens
Urobilin (Dark yellow/orange-brown
lab correlation of urine color:
Pale yellow
Polyuria (DM, DI) dilute random specimen
lab correlation of urine color:
Dark yellow/ Amber
Concentrated specimen: strenuous exercise, dehydration, fever, burns
First morning specimen
Excessive urobilin, bilirubin, CAROTENE
lab correlation of urine color:
Orange
Orange-yellow
Bilirubin (yellow foam)
Phenazopyridine (Pyridium) - used to treat UTI
“tea-colored urine”
Bilirubin (yellow foam)
lab correlation of urine color:
Green
Pseudomonas infection
asparagus
B vitamins
PHENOL