Given the following urinalysis results, select the most appropriate course of action:
pH = 6.5
Protein = Neg
Glucose = Neg
Ketone = Trace
Blood = Neg
Bilirubin = Neg
Microscopic findings:
Mucus = Small
Ammonium urate = Large
A. Recheck urine pH
B. Report these results, assuming acceptable quality control
C. Repeat the dry reagent strip tests to confirm the ketone result
D. Request a new sample and repeat the urinalysis
Give this one a try later!
, A. Recheck urine pH
Ammonium urate crystals occur at alkaline pH only. The pH should be
checked, and if it is below 7.0, the crystals should be reviewed for correct
identification. The trace ketone does not require confirmation, provided
that the quality control of the reagent strips is acceptable.
Dry reagent strip tests for microalbuminuria that compare albumin to creatinine
determine the creatinine concentration based upon which
principle?
A. Formation of a Cu+2-creatinine complex
B. Enzymatic assay using sarcosine oxidase and peroxidase
C. Reaction of creatinine with alkaline sodium picrate
D. Change in pH as creatinine is converted to creatine
Give this one a try later!
A. Formation of a Cu+2-creatinine complex
Given the following dry reagent strip urinalysis results, select the most appropriate
course of action:
pH = 8.0
Protein = 1+
Glucose = Neg
Blood = Neg
Ketone = Neg
Nitrite = Neg
Bilirubin = Neg
A. Report the results, assuming acceptable quality control
B. Check pH with a pH meter before reporting
,C. Perform a turbidimetric protein test, instead of the dipstick protein test, and report
D. Request a new specimen
Give this one a try later!
C. Perform a turbidimetric protein test, instead of the dipstick protein test,
and report
Highly buffered alkaline urine may cause a false-positive result on the dry
reagent strip protein test by titrating the acid buffer on the reagent pad.
Protein should be measured by an alternate method that is not subject to
positive interference by highly buffered alkaline urine.
At which pH are ammonium biurate crystals usually found in urine?
A. Acid urine only
B. Acid or neutral urine
C. Neutral or alkaline urine
D. Alkaline urine only
Give this one a try later!
D. Alkaline urine only
Which statement regarding methods for measuring SG is true?
A. To correct a urinometer, subtract 0.001 per each 3°C below 15.5°C
B. Colorimetric SG tests are falsely elevated when a large quantity of glucose is
present
C. Colorimetric SG readings are falsely elevated when pH is alkaline
D. Refractometry should be performed before the urine is centrifuged
Give this one a try later!
, A. To correct a urinometer, subtract 0.001 per each 3°C below 15.5°C
Which of the following conditions is often a cause of glomerulonephritis?
A. Hypertension
B. Cytomegalovirus infection
C. Systemic lupus erythematosus
D. Heavy metal poisoning
Give this one a try later!
C. Systemic lupus erythematosus
Following a transfusion reaction, urine from a patient gives positive test results for
blood and protein. The SG is 1.015. No RBCS or WBCS are seen in the microscopic
examination. These results:
A. Indicate renal injury induced by transfusion reaction
B. Support the finding of an extravascular transfusion reaction
C. Support the finding of an intravascular transfusion reaction
D. Rule out a transfusion reaction caused by RBC incompatibility
Give this one a try later!
C. Support the finding of an intravascular transfusion reaction
RBCS usually remain intact at a SG of 1.015. The absence of RBCS, WBCS,
and casts points to hemoglobinuria caused by intravascular hemolysis
rather than glomerular injury. A positive protein reaction will occur if
sufficient hemoglobin is present.
pH = 6.5
Protein = Neg
Glucose = Neg
Ketone = Trace
Blood = Neg
Bilirubin = Neg
Microscopic findings:
Mucus = Small
Ammonium urate = Large
A. Recheck urine pH
B. Report these results, assuming acceptable quality control
C. Repeat the dry reagent strip tests to confirm the ketone result
D. Request a new sample and repeat the urinalysis
Give this one a try later!
, A. Recheck urine pH
Ammonium urate crystals occur at alkaline pH only. The pH should be
checked, and if it is below 7.0, the crystals should be reviewed for correct
identification. The trace ketone does not require confirmation, provided
that the quality control of the reagent strips is acceptable.
Dry reagent strip tests for microalbuminuria that compare albumin to creatinine
determine the creatinine concentration based upon which
principle?
A. Formation of a Cu+2-creatinine complex
B. Enzymatic assay using sarcosine oxidase and peroxidase
C. Reaction of creatinine with alkaline sodium picrate
D. Change in pH as creatinine is converted to creatine
Give this one a try later!
A. Formation of a Cu+2-creatinine complex
Given the following dry reagent strip urinalysis results, select the most appropriate
course of action:
pH = 8.0
Protein = 1+
Glucose = Neg
Blood = Neg
Ketone = Neg
Nitrite = Neg
Bilirubin = Neg
A. Report the results, assuming acceptable quality control
B. Check pH with a pH meter before reporting
,C. Perform a turbidimetric protein test, instead of the dipstick protein test, and report
D. Request a new specimen
Give this one a try later!
C. Perform a turbidimetric protein test, instead of the dipstick protein test,
and report
Highly buffered alkaline urine may cause a false-positive result on the dry
reagent strip protein test by titrating the acid buffer on the reagent pad.
Protein should be measured by an alternate method that is not subject to
positive interference by highly buffered alkaline urine.
At which pH are ammonium biurate crystals usually found in urine?
A. Acid urine only
B. Acid or neutral urine
C. Neutral or alkaline urine
D. Alkaline urine only
Give this one a try later!
D. Alkaline urine only
Which statement regarding methods for measuring SG is true?
A. To correct a urinometer, subtract 0.001 per each 3°C below 15.5°C
B. Colorimetric SG tests are falsely elevated when a large quantity of glucose is
present
C. Colorimetric SG readings are falsely elevated when pH is alkaline
D. Refractometry should be performed before the urine is centrifuged
Give this one a try later!
, A. To correct a urinometer, subtract 0.001 per each 3°C below 15.5°C
Which of the following conditions is often a cause of glomerulonephritis?
A. Hypertension
B. Cytomegalovirus infection
C. Systemic lupus erythematosus
D. Heavy metal poisoning
Give this one a try later!
C. Systemic lupus erythematosus
Following a transfusion reaction, urine from a patient gives positive test results for
blood and protein. The SG is 1.015. No RBCS or WBCS are seen in the microscopic
examination. These results:
A. Indicate renal injury induced by transfusion reaction
B. Support the finding of an extravascular transfusion reaction
C. Support the finding of an intravascular transfusion reaction
D. Rule out a transfusion reaction caused by RBC incompatibility
Give this one a try later!
C. Support the finding of an intravascular transfusion reaction
RBCS usually remain intact at a SG of 1.015. The absence of RBCS, WBCS,
and casts points to hemoglobinuria caused by intravascular hemolysis
rather than glomerular injury. A positive protein reaction will occur if
sufficient hemoglobin is present.
