CLINICAL LAB SCIENEC

CHAPTER 12: PROCEDURES FOR URINALYSIS AND BODY FLUIDS 307
FIGURE 12-22 Hyaline cast (may
be nonpathological).
Source: Delmar/Cengage
Learning.
FIGURE 12-23 Granular cast.
Source: Delmar/Cengage
Learning.
FIGURE 12-24 Cellular cast.
Source: Delmar/Cengage
Learning.
FIGURE 12-25 Waxy cast.
Source: Delmar/Cengage
Learning.
FIGURE 12-26 Uric acid
crystals.
Source: Delmar/Cengage
Learning.
FIGURE 12-27 Triple phosphate
crystals.
Source: Delmar/Cengage
Learning.
FIGURE 12-28 Calcium oxalate
crystals.
Source: Delmar/Cengage
Learning.
FIGURE 12-29 Ammonium
biurate crystals.
Source: Delmar/Cengage
Learning.
Abnormal Crystals—Formed Elements in Urine
Figures 12-30 through 12-32 and Table 12-8 explain and show crystals that are found
in patients with metabolic diseases and in some cases in the urine of those who are
being administered certain medications. Samples containing cystine crystals indicate
a condition where the amino acid crystal cystine is not reabsorbed by the kidney, as
Table 12-7 Crystals Found in Normal Urine Specimen
Urine pH
Crystal Acid Neutral Alkaline
Uric acid +
Amorphous urates +
Calcium oxalate + +
Amorphous phosphates + +
Calcium phosphate + +
Triple phosphate + +
Ammonium biurate +
Calcium carbonate +
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