Chemical Examination of Urine

Question 1

multistix; chemstrip

Answer 1

Siemens Healthcare Diagnostics, Inc., Tarrytown, NY ; Roche Diagnostics,
Indianapolis, IN

Question 2

errors caused by improper technique

Answer 2

• formed elements tend to settle down so it may be undetected if specimen is unmixed
• rgt strip remaining in the urine for an extended period of time may cause leaching of reagents from the pad
• failure to remove excess urine to remain on the strip after its removal in the specimen may cause runover and produce color distortion (to remedy: blot the edge of the strip on absorbent paper and hold the strip horizontally while comparing it with the color chart
• (include other tips here later)

Question 3

RGT strips must be protected from deterioration caused by

Answer 3

• moisture
• volatile chemicals
• heat
• light

Question 4

RGT strips must be stored at?

Answer 4

room temp below 30c but never refrigerated

Question 5

when is quality control for rgt strips performed?

Answer 5

• check with both positive and negative control at the beginning of each shift
• when a new bottle of reagent is opened
• when questionable results are obtained
• when there is a concern about the integrity of the rgt strips

Question 6

what organs are responsible for the acid-base balance in the body

Answer 6

• lungs
• kidneys

Question 7

first morning urine of healthy individuals will have a ph of ____

Answer 7

5.0 - 6.0

Question 8

more alkaline pH is found after meals termed as?

Answer 8

alkaline tide

Question 9

pH of normal random specimens can range from

Answer 9

4.5 - 8.0

Question 10

urine pH of px w/ emphysema

Answer 10

acid

Question 11

urine pH of px w/ diabetes mellitus

Answer 11

acid

Question 12

urine pH of px w/ starvation

Answer 12

acid

Question 13

urine pH of px w/ dehydration

Answer 13

acid

Question 14

urine pH of px w/ diarrhea

Answer 14

acid

Question 15

urine pH of px w/ presence of acid-producing bacteria (e.coli)

Answer 15

acid

Question 16

urine pH of px w/ a high-protein diet

Answer 16

acid

Question 17

urine pH of px consuming cranberry juice

Answer 17

acid

Question 18

urine pH of px w/ medications like (methenamine mandelate [Mandelamine],
fosfomycin tromethamine [Monurol])

Answer 18

acid

Question 19

urine pH of px w/ hyperventilation

Answer 19

alkaline

Question 20

urine pH of px w/ vomiting

Answer 20

alkaline

Question 21

urine pH of px w/ renal tubular acidosis

Answer 21

alkaline

Question 22

urine pH of px w/ presence of urease-producing bacteria

Answer 22

alkaline

Question 23

urine pH of px w/ vegetarian diet

Answer 23

alkaline

Question 24

urine pH of px w/ old specimen

Answer 24

alkaline

Question 25

people on high meat and high protein diet tend to produce what pH of urine

Answer 25

acidic

Question 26

people who are vegetarians have ___ urine (pH)

Answer 26

alkaline (due to the formation of bicarbonate after digesting of many fruits and vegetables; with the exception of cranberry - acidic)

Question 27

urine pH above 8.5 indicates?

Answer 27

improperly preserved specimen (fresh specimen must be obtained again)