01/10/2025
Urine Test (Urinalysis)
1. Objective
The objective of the test was to examine the patient’s urine for physical, chemical, and microscopic abnormalities to aid in diagnosis of renal, metabolic, and systemic conditions.
2. Principle
The test was based on three components:
Physical examination: color, appearance, odor, volume, and specific gravity were assessed.
Chemical examination: dipstick method was used, where reagent pads changed color in the presence of glucose, protein, ketones, blood, bilirubin, nitrite, or leukocyte esterase.
Microscopic examination: urine sediment was observed under the microscope to identify cells, casts, crystals, and microorganisms.
3. Materials
Fresh urine sample (clean-catch, midstream)
Sterile urine container
Dipstick test strips
Centrifuge and centrifuge tubes
Glass slides and cover slips
Light microscope
Pipettes
4. Procedure (Microscopic)
A fresh urine sample was collected in a sterile container.
The urine was centrifuged at 1500–2000 rpm for 5 minutes.
The supernatant was discarded, leaving the sediment.
A drop of the sediment was placed on a glass slide and covered with a cover slip.
The slide was examined under the microscope at low and high power magnifications.
Red blood cells, white blood cells, epithelial cells, casts, crystals, bacteria, or yeast were identified and recorded.
5. Result
Normal urine appeared pale yellow, clear, with specific gravity 1.005–1.030, pH 4.5–8, and no glucose, protein, ketones, or blood.
Microscopy revealed only a few epithelial cells and occasional crystals.
Abnormal results included proteinuria, hematuria, glucosuria, ketonuria, bacteriuria, or the presence of abnormal casts and crystals.
6. Uses
It was used to detect urinary tract infections (UTIs).
It helped in the diagnosis of diabetes mellitus and renal diseases.
It was used to monitor hydration status.
It assisted in the early detection of metabolic disorders.
7. Consultation
The results were interpreted by a physician. Abnormal findings required further tests like urine culture, blood tests, or imaging studies. Patients were counseled regarding hydration, lifestyle changes, or treatment depending on the underlying condition.
