Chapter 2: Introduction to Urinalysis Flashcards
Urine Composition: Percent of Water
95 to 97 %
Urine Composition: Percent of Solid
3 to 5 % : 60 grams in 24 hours
Major organic component of urine
UREA
How many grams of organic substance in urine Composition
35 grams
How many grams of INORGANIC substance in urine Composition?
25 grams
Major INORGANIC substance component of urine
Chloride
Normal range of urine volume
600 to 2000 mL
Average of Urine Volume
1200 to 1500 mL per day
Night:Day ratio of urine volune
1:2 to 1:3
Increased urine volume
Polyuria
Polyuria produce _ mL urine per day
> 2000 (Henry) >2500 (Strasinger)
Major Causes of Polyuria
- Increased fluid Intake
- Diuretics
- Diabetes Millitus
- Diabetes Insipidus
is caused by a defect of either pancreatic production of insulin or in the function of insulin which results increased of glucose concentration
Diabetes Mellitus
results in the decrease in the production or function of ADH
Diabetes insipidus
Decrease urine volume
Oliguria
Oliguria is the production of __ mL of urine per day
<500 mL (Henrys)
<400 mL (Strasinger)
Causes of Oliguria
- Dehydration
- Renal Calculi or Tumor
Complete cessation of urine
Anuria
Anuria is the production of __ mL urine per day
<100 mL
Causes of Anuria
- Complete Obstruction (stones, carcinomas)
- Toxic Agents
- Decreased Renal blood flow
Excretion of more than 500 mL of urine at night
Nocturia
Cause of Nocturia
Pregnancy
SG of urine to an individual having nocturia
< 1.018
Recommended Capacity of urine containers
50 mL
Volume required for UA
10 to 15 mL
Average: 12 mL
Containers for microbiological studies
Sterile Containers
All urine specimens must be labeled with
- Patients name and identification number
- Date and time of collection
- Health care providers name
For routine and qualitative urinalysis and can be collected any time
Random Specimen
Ideal specimen for routine UA and pregnancy test
First morning specimen
Specimen for Evaluation of orthostatic Proteinuria
First Morning specimen
Second morning Specimen is aka
Fasting Specimen
2nd voided urine after a period of fasting
Second Morning/ Fasting Specimen
Specimen for glucose determination
Second Morning/ Fasting Specimen
Specimen for monitoring/screening for diabetic patients
2 hour postprandial
Optional with blood samples in glucose tolerance test
Glucose tolerance
Series of blood and urine samples are collected at specific time intervals to compare the concentration of a substance in urine with its concentration in the blood
Use in the Diagnosis of Diabetes
Fractional Specimen
Four routine screening and bacterial culture
Midstream Clean-Catch Specimen
Specimen For bacterial culture
Catheterized Specimen
Bladder urine for anaerobic bacterial culture and urine cytology
Suprapubic Aspiration
Specimen for prostatic infection
Three-Glass Technique
Prostatic infection is when the no. of WBC and bacteria in 3rd specimen is ___ X greater than the 1st
10
For Addis count
12-hour urine
For nitrite determination
4-hour urine
For urobilinogen determination
Afternoon (2 pm to 4 pm)
Urine preservatives for routine urinalysis and routine culture
Refrigeration
Urine preservative that preserve glucose and sediments well
Thymol
Urine preservative that preserve protein and formed elements
Boric Acid
Preservative for Addis count
Formalin
Prevent glycolysis and a good preservative for drug analysis
Sodium Fluoride
Preserves cellular elements and good for cytology studies
Saccomano Fixative
These increased in unpreserved urine
PH, Bacteria, Odor, Nitrite
Process that provides documentation of proper sample identification from the tike of collection to the receipt of laboratory results
Chain of Custody
Required urine volume for chain of custody
30 to 45 mL
Required container for chain of custody
60 mL capacity
Temp for chain of custody
32.5 to 37.3