S1 [LAB]: URINE PERSERVATIVES

Question 1

Identify the urine preservative:

Prevents bacterial growth for 24h

Answer 1

Refrigeration

Question 2

Identify the urine preservative:

Preserves glucose and sediments well

Answer 2

Thymol

Question 3

Identify the urine preservative:

Raises specific gravity by hydrometer

Answer 3

Refrigeration

Question 4

Identify the urine preservative:

Precipitates amorphous phosphates and urates

Answer 4

Refrigeration

Question 5

Identify the urine preservative:

Does not interfere with chemical tests

Answer 5

Refrigeration

Question 6

Identify the urine preservative:

Interferes with acid precipitation tests for protein

Answer 6

Thymol

Question 7

Identify the urine preservative:

Preserves protein and formed elements well

Answer 7

Boric acid

Question 8

Identify the urine preservative:

Does not interfere with routine analyses other than pH

Answer 8

Boric acid

Question 9

Identify the urine preservative:

May precipitate crystals when used in large amounts

Answer 9

Boric acid

Question 10

Identify the urine preservative:

Keeps pH at 6.0

Answer 10

Boric acid

Question 11

Identify the urine preservative:

Is bacteriostatic at 18 g/L

Answer 11

Boric acid

Question 12

Identify the urine preservative:

Interferes with drug and hormone analyses

Answer 12

Boric acid

Question 13

Identify the urine preservative:

Excellent sediment preservative

Answer 13

Formalin

Question 14

Identify the urine preservative:

Acts as a reducing agent, interfering with chemical tests for glucose, blood, leukocyte esterase, and copper reduction

Answer 14

Formalin

Question 15

Identify the urine preservative:

Used to rinse the specimen container to preserve cells and casts

Answer 15

Formalin

Question 16

Identify the urine preservative:

Does not interfere with routine tests

Answer 16

Toluene, Phenol

Question 17

Identify the urine preservative:

Floats on surface of specimens and clings to pipettes and testing materials

Answer 17

Toluene

Question 18

Identify the urine preservative:

Prevents glycolysis

Answer 18

Sodium fluoride

Question 19

Identify the urine preservative:

Good for drug analysis

Answer 19

Sodium fluoride

Question 20

Identify the urine preservative:

Inhibits reagent strip tests for glucose, blood, and leukocytes

Answer 20

Sodium fluoride

Question 21

Alternative for fluoride in sodium fluoride preservative in reagent strip testing

Answer 21

Sodium benzoate

Question 22

Identify the urine preservative:

Causes odor change

Answer 22

Phenol

Question 23

How many drops of phenol per ounce of specimen is used?

Answer 23

1

Question 24

Identify the urine preservative:

Convenient when refrigeration is not possible

Answer 24

Commercial preservative tablet

Question 25

Identify the urine preservative: Have controlled concentration to minimize interference

Answer 25

Commercial preservative tablet

Question 26

Identify the urine preservative: May contain one or more of the preservatives including sodium fluoride

Answer 26

Commercial preservative tablet

Question 27

Identify the urine preservative: Sample is stable at room temperature for 48h; preserves bacteria

Answer 27

Gray C&S tube

Question 28

Identify the urine preservative: Used on automated instruments

Answer 28

Yellow plain UA tube

Question 29

Identify the urine preservative: Decreases pH level

Answer 29

Gray C&S tube

Question 30

Preservative of gray C&S tube

Answer 30

Boric acid

Question 31

Identify the urine preservative: Not used if urine is below minimum fill line

Answer 31

Gray C&S tube

Question 32

The use of yellow plain UA tube requires refrigeration for ___ hours

Answer 32

2

Question 33

Identify the urine preservative: Stable for 72 hours at RT; instrument-compatible

Answer 33

Cherry red/ Yellow top tube

Question 34

Identify the urine preservative: Bilirubin and urobilinogen may be decreased if specimen is exposed to light and left at RT

Answer 34

Cherry red/ Yellow top tube

Question 35

Preservative of cherry red/ yellow top tube

Answer 35

Sodium propionate

Question 36

Identify the urine preservative: Preserves cellular elements

Answer 36

Saccomanno fixative

Question 37

Identify the urine preservative: Used for cytology studies

Answer 37

Saccomanno fixative