1. Define specific gravity.

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1. Define specific gravity. 2. What information
does the specific gravity of urine provide? 3.
What is the name of the device used to measure
specific gravity? 4. What is the normal range
for the specific gravity of urine in humans? 5.
List three things (on one line) that can be
assessed using urine reagent test strips, e.g.,
Clinistix, Multistix, Chemstrip. 6. Is the
specific gravity of urine related to the
osmolarity (or osmolality) of urine?
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1. Define specific gravity. Specific gravity is
the ratio of the weight of a volume of some
substance compared with the weight of an equal
volume of pure H2O (specific gravity of H2O
1.000) 2. What information does the specific
gravity of urine provide? Specific gravity of
urine is an indicator of the amount of solute
present in the urine. (Abnormally low/high
specific gravity may be indicative of pathology
in the kidney or urine elimination system.) 3.
What is the name of the device used to measure
specific gravity? A Urinometer or hydrometer.
(The difference between the two is the range of
specific gravity each can measure, the urinometer
having a smaller range.) 4. What is the normal
range for the specific gravity of urine in
humans? 1.003 to 1.035
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5. List three things (on one line) that can be
assessed using urine reagent test strips, e.g.,
Clinistix, Multistix, Chemstrip. pH, glucose,
protein, ketones, bilirubin, Hb/occult blood,
Nitrites 6. Is the specific gravity of urine
related to the osmolarity (or osmolality) of
urine? Definitely! Both measure the
concentration of solutes in the urine. Specific
gravity is used as a first assessment since its
easy to do. Further thinking If the normal
range of urine specific gravity (USG) is 1.001 to
1.035, and urine osmolarity varies between about
50 mOsm/L to 1200 mOsm/L, what is the numerical
relationship to of 0.001 unit of specific gravity
to each 100 mOsm/L?