NU120/NU120 QUESTION AND
CORRECT ANSWERS
How should the nurse identify the patient before obtaining a laboratory specimen
from Mr. Smith?
a. Using at least two patient identifiers
b. Looking at the chart before entering the room
c. Asking the patient if he is Mr. Smith
d. Checking the patient's arm band twice - ANSWER-ANS: A
Before obtaining a laboratory specimen, use at least two identifiers such as the
identification number on the admission arm band and asking the patient's name.
Patients
who are confused or who have a language barrier may smile and not understand the
question. The patient could also have the wrong arm band on; checking it twice would
not change that.
When discussing the collection of a clean-voided urine specimen, it is important
for the nurse to instruct the patient to:
a. Use a clean specimen cup
b. Collect 100 to 150 mL of urine for testing
c. Void some urine first and then collect the sample
d. Wash the perineal area with soap and water immediately before voiding - ANSWER-
NS: C
After patient has initiated urine stream, pass urine specimen container into stream and
collect 30 to 60 mL of urine. A sterile specimen container is used. Pour antiseptic
solution over cotton balls. Cotton ball or gauze is used to cleanse perineum.
The nurse needs to obtain a sterile urine specimen for culture and sensitivity
(C&S) from a patient who has an indwelling catheter. The catheter was placed the night
before. What must the nurse do in order to obtain the specimen?
a. Obtain the urine from the drainage bag
b. Clamp the drainage tubing for 30 minutes
c. Draw urine using a 20-mL syringe
d. Insert the needle into the silicone catheter - ANSWER-ANS: B
Clamp drainage tubing with clamp or rubber band for 30 minutes to permit collection of
fresh, sterile urine in catheter tubing rather than draining into bag.
Do not collect a urine specimen for culture tests from a urine drainage bag unless it is
the
first urine to drain into a new sterile bag. Draw urine into 3-mL syringe (for culture), or
draw urine into 20 mL-syringe (for routine urinalysis). Proper volume is needed to
perform test.
Do not puncture Silastic, silicone, or plastic catheters. These are not self-sealing.
,What should the nurse do first if a patient is unable to void on demand for a cleanvoided
specimen?
a. Perform Credé's procedure for the suprapubic area
b. Catheterize the patient to obtain the specimen
c. Offer fluids, if allowed, and wait about 30 minutes
d. Notify the physician that the test cannot be completed - ANSWER-ANS: C
If patient is unable to urinate on demand, offer fluids if permitted. Allow more time for
urine to accumulate in bladder. Try obtaining specimen after 30 minutes.
What must the nurse do to collect a midstream urine sample from an infant?
a. Apply a sterile plastic collection bag to the perineum
b. Wring out diapers and collect the urine in a specimen container
c. Have infant sit facing the back of the toilet
d. Catheterize the infant and collect the urine using sterile procedure - ANSWER-ANS:
A
Use a sterile plastic urine collecting bag that adheres to the perineum of a non-
toilettrained
child. Special considerations for boys: Place penis and scrotum inside the bag.
Diapers may be contaminated. Seating on a toilet is generally not realistic for an infant.
Catheterization should be used as a last resort only.
What should the nurse do when a patient is required to provide a timed urine
specimen?
a. Save all urine from the time that the test began
b. Leave the collection bottle on the floor near the patient's bed
c. Send notices along with the patient to have all urine saved and returned to the unit
d. Remove contaminants such as toilet paper from the urine before transferring it to
the collection bottle - ANSWER-ANS: C
Place signs on the patient's door and toileting area, indicating that a timed urine
specimen
collection is in progress. If patient leaves the unit for a test or procedure, be sure that
personnel in that area collect and save all urine.
The nurse discards the first specimen and then collects every successive specimen until
the time period has ended. Place specimen collection container in the bathroom and, if
indicated, in a pan of ice. Urine specimen is not to be contaminated with feces or toilet
tissue.
What instructions does the nurse provide to the patient to obtain a double-voided
urine specimen?
a. Save two separate specimens from the first voiding in the morning
b. Add two specimens together from the morning and evening voiding
c. Discard the first sample, then wait a half hour and void again
d. Void first and then self-catheterize to obtain the specimens - ANSWER-ANS: C
A fresh specimen should be used because stagnant urine that has been in the bladder
for
several hours will not accurately reflect serum glucose level at time of testing. Ask
, patient to collect random urine specimen and discard, drink a glass of water, and collect
another specimen 30 to 45 minutes later.
An appropriate procedure for urine testing with reagent strips for chemical
properties of the sample is to:
a. Obtain the first voided specimen in the morning
b. Immerse the test strip in the urine and remove immediately
c. Add a chemically active tablet to the urine and then test it with a reagent strip
d. Wipe the strip with a sterile gauze after dipping - ANSWER-ANS: B
Immerse the strip briefly in the urine sample, remove and tap gently on side of
container,
prolonged exposure to excess urine can dilute reagents.
A patient is concerned because her first guaiac test is positive. What information
should the nurse share with the patient?
a. The patient probably has colorectal cancer
b. The test needs to be repeated after she eats some red meat
c. The test needs to be repeated at least 3 times
d. The patient needs a low-residue diet to reduce intestinal abrasions - ANSWER-ANS:
C
A single positive test result does not confirm bleeding or indicate colorectal cancer. For
confirmed positive results, the test must be repeated at least three times while patient is
on meat-free, high-residue diet. More in-depth diagnosis is needed with positive result.
When teaching a patient about home testing for occult blood, the nurse instructs
the patient that:
a. Positive results are indicative of bleeding
b. Poultry and fish should be eaten before testing
c. Testing should be done carefully during the menstrual cycle
d. Two samples should be obtained from the same part of the stool specimen -
ANSWER-ANS: C
Specimens will be positive if contaminated by menstrual blood or hemorrhoidal blood or
povidone-iodine. A single positive test result does not confirm bleeding or indicate
colorectal cancer. Diets rich in meats; green, leafy vegetables; poultry; and fish may
produce false-positive results. Obtain second fecal specimen from different portion of
stool.
A patient asks what food may be eaten before a stool specimen is obtained for
occult blood. What food should the nurse allow the patient to eat?
a. Fish
b. Apples
c. Red meats
d. Green, leafy vegetables - ANSWER-ANS: B
Diets rich in meats; green, leafy vegetables; poultry; and fish may produce false-positive
results.
CORRECT ANSWERS
How should the nurse identify the patient before obtaining a laboratory specimen
from Mr. Smith?
a. Using at least two patient identifiers
b. Looking at the chart before entering the room
c. Asking the patient if he is Mr. Smith
d. Checking the patient's arm band twice - ANSWER-ANS: A
Before obtaining a laboratory specimen, use at least two identifiers such as the
identification number on the admission arm band and asking the patient's name.
Patients
who are confused or who have a language barrier may smile and not understand the
question. The patient could also have the wrong arm band on; checking it twice would
not change that.
When discussing the collection of a clean-voided urine specimen, it is important
for the nurse to instruct the patient to:
a. Use a clean specimen cup
b. Collect 100 to 150 mL of urine for testing
c. Void some urine first and then collect the sample
d. Wash the perineal area with soap and water immediately before voiding - ANSWER-
NS: C
After patient has initiated urine stream, pass urine specimen container into stream and
collect 30 to 60 mL of urine. A sterile specimen container is used. Pour antiseptic
solution over cotton balls. Cotton ball or gauze is used to cleanse perineum.
The nurse needs to obtain a sterile urine specimen for culture and sensitivity
(C&S) from a patient who has an indwelling catheter. The catheter was placed the night
before. What must the nurse do in order to obtain the specimen?
a. Obtain the urine from the drainage bag
b. Clamp the drainage tubing for 30 minutes
c. Draw urine using a 20-mL syringe
d. Insert the needle into the silicone catheter - ANSWER-ANS: B
Clamp drainage tubing with clamp or rubber band for 30 minutes to permit collection of
fresh, sterile urine in catheter tubing rather than draining into bag.
Do not collect a urine specimen for culture tests from a urine drainage bag unless it is
the
first urine to drain into a new sterile bag. Draw urine into 3-mL syringe (for culture), or
draw urine into 20 mL-syringe (for routine urinalysis). Proper volume is needed to
perform test.
Do not puncture Silastic, silicone, or plastic catheters. These are not self-sealing.
,What should the nurse do first if a patient is unable to void on demand for a cleanvoided
specimen?
a. Perform Credé's procedure for the suprapubic area
b. Catheterize the patient to obtain the specimen
c. Offer fluids, if allowed, and wait about 30 minutes
d. Notify the physician that the test cannot be completed - ANSWER-ANS: C
If patient is unable to urinate on demand, offer fluids if permitted. Allow more time for
urine to accumulate in bladder. Try obtaining specimen after 30 minutes.
What must the nurse do to collect a midstream urine sample from an infant?
a. Apply a sterile plastic collection bag to the perineum
b. Wring out diapers and collect the urine in a specimen container
c. Have infant sit facing the back of the toilet
d. Catheterize the infant and collect the urine using sterile procedure - ANSWER-ANS:
A
Use a sterile plastic urine collecting bag that adheres to the perineum of a non-
toilettrained
child. Special considerations for boys: Place penis and scrotum inside the bag.
Diapers may be contaminated. Seating on a toilet is generally not realistic for an infant.
Catheterization should be used as a last resort only.
What should the nurse do when a patient is required to provide a timed urine
specimen?
a. Save all urine from the time that the test began
b. Leave the collection bottle on the floor near the patient's bed
c. Send notices along with the patient to have all urine saved and returned to the unit
d. Remove contaminants such as toilet paper from the urine before transferring it to
the collection bottle - ANSWER-ANS: C
Place signs on the patient's door and toileting area, indicating that a timed urine
specimen
collection is in progress. If patient leaves the unit for a test or procedure, be sure that
personnel in that area collect and save all urine.
The nurse discards the first specimen and then collects every successive specimen until
the time period has ended. Place specimen collection container in the bathroom and, if
indicated, in a pan of ice. Urine specimen is not to be contaminated with feces or toilet
tissue.
What instructions does the nurse provide to the patient to obtain a double-voided
urine specimen?
a. Save two separate specimens from the first voiding in the morning
b. Add two specimens together from the morning and evening voiding
c. Discard the first sample, then wait a half hour and void again
d. Void first and then self-catheterize to obtain the specimens - ANSWER-ANS: C
A fresh specimen should be used because stagnant urine that has been in the bladder
for
several hours will not accurately reflect serum glucose level at time of testing. Ask
, patient to collect random urine specimen and discard, drink a glass of water, and collect
another specimen 30 to 45 minutes later.
An appropriate procedure for urine testing with reagent strips for chemical
properties of the sample is to:
a. Obtain the first voided specimen in the morning
b. Immerse the test strip in the urine and remove immediately
c. Add a chemically active tablet to the urine and then test it with a reagent strip
d. Wipe the strip with a sterile gauze after dipping - ANSWER-ANS: B
Immerse the strip briefly in the urine sample, remove and tap gently on side of
container,
prolonged exposure to excess urine can dilute reagents.
A patient is concerned because her first guaiac test is positive. What information
should the nurse share with the patient?
a. The patient probably has colorectal cancer
b. The test needs to be repeated after she eats some red meat
c. The test needs to be repeated at least 3 times
d. The patient needs a low-residue diet to reduce intestinal abrasions - ANSWER-ANS:
C
A single positive test result does not confirm bleeding or indicate colorectal cancer. For
confirmed positive results, the test must be repeated at least three times while patient is
on meat-free, high-residue diet. More in-depth diagnosis is needed with positive result.
When teaching a patient about home testing for occult blood, the nurse instructs
the patient that:
a. Positive results are indicative of bleeding
b. Poultry and fish should be eaten before testing
c. Testing should be done carefully during the menstrual cycle
d. Two samples should be obtained from the same part of the stool specimen -
ANSWER-ANS: C
Specimens will be positive if contaminated by menstrual blood or hemorrhoidal blood or
povidone-iodine. A single positive test result does not confirm bleeding or indicate
colorectal cancer. Diets rich in meats; green, leafy vegetables; poultry; and fish may
produce false-positive results. Obtain second fecal specimen from different portion of
stool.
A patient asks what food may be eaten before a stool specimen is obtained for
occult blood. What food should the nurse allow the patient to eat?
a. Fish
b. Apples
c. Red meats
d. Green, leafy vegetables - ANSWER-ANS: B
Diets rich in meats; green, leafy vegetables; poultry; and fish may produce false-positive
results.
