CLINICAL LAB SCIENEC

CHAPTER 12: PROCEDURES FOR URINALYSIS AND BODY FLUIDS 299
A
B
FIGURE 12-12 Chemical testing of urine by reagent strip. (A) Saturating chemical pads of dipstick. (B) Draining and blotting
edge of dipstick. (C) Comparing for color reactions using reaction chart.
Source: Delmar/Cengage Learning.
7. Variations in an individual’s urine color may cause the patient test strip to have
a slightly different color than the color chart on the bottle. In addition, differing
brands of chemical strips may have different reporting values. If the test strip
color does not match a particular color square on the color chart, then match the
test strip to a color square of equal intensity. If the color development is slightly
uneven, then match the average color on the test pad.
8. Record results on the appropriate form and dispose of the dipstick in the proper
waste receptacle
9. If necessary for confirmation, the estimate of the specific gravity provided by
the dipstick may require the use of instruments for confirming the results before
they are reported. When required, perform a specific gravity for the urine sample
using a urinometer (Figure 12-3) or a refractometer (Figure 12-4).
10. Perform confirmatory tests for protein, reducing substances, ketones, and bilirubin
if the dipstick indicates positive results for these (see Procedures #3 through #6).
11. Discard all supplies used for the procedure in appropriate containers. A disinfectant
should be used to clean work surfaces, and equipment should be cleaned
and restored to its former position. Discard gloves appropriately and wash hands
thoroughly in accordance with established policies.
C
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