Exam 5: Chemical Examination of Urine

The following urinalysis results are obtained from a female vegetarian who supplements her diet with megavitamins: -Why is there a discrepancy between the urine color and specific gravity?

The cells most frequently associated with urinary tract infection are:

State the most probable cause for each of the following scenarios: -A student reports a positive urobilinogen using Multistix and a negative urobilinogen using Chemstrip on the same specimen.

Ammonium sulfate is added to a red colored urine.The urine had a positive reaction for blood,but there were no red blood cells in the sediment.After centrifugation,the sedimented ammonium sulfate is red.The abnormal color is caused by:

A urine sample that tests positive for ketones and negative for glucose is most likely from a patient suffering from:

Determine whether each of the following patients is expected to produce this urine. Urinalysis produces the following results: -A 7-year-old girl with uncontrolled diarrhea and vomiting for 3 days.

A negative reagent strip test for glucose with a positive Clinitest indicates the possibility of:

A dark blue color in the reagent strip pad for specific gravity indicates:

Quality control on reagent strips must be performed whenever a/an:

Reagent strip results associated with hemolytic disease would correspond with which of the following?

Which of the following will be detected by the reagent strip nitrite reaction?

Reagent strip chemical tests may be inaccurate if the specimen is:

State the most probable cause for each of the following scenarios: -A laboratory that routinely screens all infants with the Clinitest is accused of missing a case of galactosuria.

Determine whether each of the following patients is expected to produce this urine. Urinalysis produces the following results: -An uncontrolled diabetic patient who is 2 hours postprandial.

Determine whether each of the following patients is expected to produce this urine. Urinalysis produces the following results: -A 25-year-old woman on a high-protein,low-carbohydrate diet.

The method of choice for performing a specific gravity following administration of radiographic dye is:

The reagent strip test for nitrite is based on the:

All of the following descriptions apply to orthostatic proteinuria except:

Which of the following statements is/are correct for glucose testing by reagent strip? I. Glucose oxidase reacts with glucose in the urine. II. Non-glucose–reducing substances fail to react. III. Ascorbic acid may cause a false-negative reaction. IV. Hydrogen peroxide and peroxidase react to oxidize a chromogen.

Specimens for urobilinogen testing are collected between 2 p.m.and 4 p.m.because: