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Renal 12 UA tutoral
Leonard: Urinalysis Tutoral
Question | Answer |
---|---|
Check for ____ with Macroscopic Urinalysis | Color and turbidity |
Urine dipstick chemical analysis checks... | pH, Specific Gravity Protein, Glucose Ketones, Nitrite Leukocyte Esterase |
Cells your looking for under microscopic UA | Red blood cells White blood cells Epithelial cells |
Different types of casts | Hyaline cast Red cell casts White cell cast Granular cast Waxy cast |
What "extra" things are you looking for with microscopic UA? | Bacteria Yeast Crystals |
Proper method of routine collection of urine specimen | Clean-catch, midstream After cleansing the urethral meatus |
Time of day for collection | Early morning before ingestion of any fluid |
Method for cleaning the urethral meatus | Cotton sponge soaked with benzalonium hydrochloride |
Collection should be done after how much of the bladder is emptied? | One half |
Normal pH on dipstick | 6-7.4 Can be 4.5-8 |
Normal specific gravity on dipstick | 1.002-1.035 <1.007=hydration >1.035=dehydration |
+ Nitrite on dipstick | Bacteria in significant numbers G- rods are more likely E. coli |
+ Leukocyte esterase | Presense of WBCs in the urine |
Microscopic analysis significance | Appearance of RBCs must be observed as they can get into the urine in other ways |
Significance of renal tubular epithelial cells and oval fat bodies | Nephritic syndrome increase the number of cells sloughed off Oval fat bodies occur in lipiduria |
"Maltese cross" configuration | Oval fat bodies with lipiduria |
General cast formation | Formed in the DCT by mucoprotein secretion from the tubular cells |
Hyaline cast | Protein casts with long, thin tails |
RBC cast | RBC stick together Indicative of glomerulonephritis |
WBC cast | typically seen in acute pyelonephritis Also with glomerulonephritis |
Granular cast | Cellular case in the nephron that begins to degenerate |
Waxy (broad) cast | granular cast in the nephron that continues to degenerate |
Frequency of urine crystals | Oxalate: Common Triple Phosphate: Common Cystine: Quite rare |