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Which of the following collection types should be performed to obtain a highly concentrated urine specimen?
A deficiency in arginine vasopressin (antidiuretic hormone [ADH]) is associated with:
When using a refractometer to measure urine concentration, the laboratorian must correct for which of the following in their calculations?
Which of the following collection methods would account for diurnal variation when quantitatively measuring urinary analytes?
The method of choice for determining urine concentration following administration of x-ray contrast dye is:
Which of the following urinary parameters may be measured to assess renal tubular function?
Refractive index is a comparison of light:
The presence of biliverdin may cause a urine sample to appear:
A urine sample collected from a 5-day-old baby has a noticeably sweet odor reminiscent of caramel or burnt sugar. This odor is most commonly associated with:
A random urine sample from a patient with diabetes insipidus is most likely to appear:
Patients that produce more than 3000 mL (3 L) of urine in a 24-hour period are described as having:
A urine sample with specific gravity of 1.003 will likely appear:
After receiving a timed urine for quantitative analysis, the laboratorian must first:
A falsely low result for urobilinogen may occur if the urine specimen is:
Which of the following urine results is most likely to be affected by prolonged light exposure?
The results in this table are obtained on a urine specimen collected at 8:00 AM:
|
test |
result |
|
color |
yellow |
|
clarity |
hazy |
|
glucose |
250 mg/dL |
|
bilirubin |
negative |
|
ketones |
40mg/dL |
|
specific gravity |
1.010 |
|
blood |
negative |
|
pH |
6.0 |
|
protein |
100 mg/dL |
|
urobilinogen |
0.2mg/dL |
|
nitrite |
positive |
|
leukocyte esterase |
moderate |
If the sample is stored unrefrigerated and retested at 12:00 PM, which of the following test results would likely be decreased due to the storage conditions?
Which of the following would be affected by allowing a urine specimen to remain at room temperature for 3 hours before analysis?
The glucose test pad on a test strip may yield a false-positive result in the presence of:
Which of the following confirmatory tests has historically been used to semi-quantitatively determine the presence of urinary ketones?
The occult blood test pad on a test strip may yield a false-positive result in the presence of: