Clinical Chemistry Flashcards
What detects Glucose on Urine Reagent Strips?
Enzymatic reaction of glucose oxidase
What detects Ketones on Urine Reagent Strips?
Nitroprusside reaction
With Pregnancy, will Hematocrit go up or down?
- Decreases; first trimester
- Reaches lowest; end of second trimester
- Increases; third trimester
With Pregnancy, will Fibrinogen go up or down?
Increase progressively from first to last trimester
With Pregnancy, will Glomerular Filtration go up or down?
Increases 40% - 50% in a normal pregnancy
24 Hour Urine: Reference Range
800 - 2,000 mL/day
24 Hour Urine: Anuria
- Absent/no urine
- Kidney’s aren’t producing urine
24 Hour Urine: Polyuria
- Large amounts of urine
- More than 3 L/day
24 Hour Urine: Oliguria
- Low urine output
- Less than 400 mL/day or 20mL/hour
Hyaline Casts: Are they Normal?
Occassional is normal
Hyaline Casts: Increased Result of
- Stress
- Strenuous Exercise
- Chronic renal disease
- Glomerulonephritis
- Pyelonephritis
- Congestive heart failure
Hyaline Casts: Formed by
Formed by aggregated Tamm-Horsfall protein
Hyaline Casts: Location
Kidney Tubules
Crystals in the Urine: Amorphous Urates
Dark or yellow-red granules
Crystals in the Urine: Calcium Oxalate - Dihydrate
- Envelope shape (dihydrate form)
- Oval, dumbbell (monohydrate form)
Crystals in the Urine: Calcium Oxalate - Monohydrate
- Found in both normal and abnormal urine
- Can be found in a range of urine pH from acidic to neutral
Crystals in the Urine: Uric Acid - Various Shapes
Colorless-to-yellow or brown
- Rhombus
- Hexagonal plates
- Rosettes
- Rectangles
- Irregular
Crystals in the Urine: Ammonium Biurate
- Round; thorny projections
- Dark yellow to brown
Crystals in the Urine: Amorphous Phosphate
Amorphous granules
Crystals in the Urine: Calcium Phosphate
- Flat rectangles
- Prisms
- Rosettes
Crystals in the Urine: Triple Phosphate
4-6 sided prisms resembling coffin lids
What is Usually present in Urine?
- 95% water
- 5% solutes
Name the 3 Liver Functioning Tests and Tubes Used
- Albumin & total protein
- Bilirubin (protect from light)
- Prothrombin Time (PT)
- Use yellow-gold & blue tubes
What does it mean if there’s indication of Bilirubin in the urine?
Early signs of liver damage / Disease
Bence-Jones Protein: Precipitate
45-60C temp
Bence-Jones Protein: Redissolve
Heated near 130C
Confirmatory Tests in Urinalysis: Bilirubin
Ictotest
Confirmatory Tests in Urinalysis: Ketones
Acetest
Confirmatory Tests in Urinalysis: Protein
- Acid precipitation
- Dilute sulfosalicylic acid
- Dilute acetic acid
Key Ingredients in Clinitest in Urinalysis: Copper Reduction Tests
- Detects reduced sugars
- Use for sugars other than glucose
- Galactosuria
- Caustic reagent
Orange Urine will indicate the presence of what?
- Dehydration
- Problem with liver or bile duct
What will indicate the presence of Ketones in Urine?
- Some ketones is normal
- High ketone levels; body is too acidic
Fecal Absorbance Test (Patient Instructions)
- 100-150 grams; fat
- 100 grams; protein
- 180 grams; carbohydrates
Grades of Water: Water = ?
Universal solvent
Grades of Water: Distillation
Steam rises; free from microbiological impurities, bacteria, minerals
Grades of Water: Deionization
Removal of ionic impurities; chemical, bacterial
Grades of Water: Type I - Highest Purity
- Trace metals removed
- Used for sensitive analytical procedures
Grades of Water: Type II - Less than Type I
- General lab procedures
- Preparations of reagents/stains
Grades of Water: Type III - Least Pure
- Washing
- Water baths
- Not tap water
Grades of Reagents: American Chemical Society (ACS)
- Sets high standards for reagent purity
- Overseeing body
- Not a rating or grade of chemical
Grades of Reagents: Analytical Reagent (AR)
- Highest purity
- Clinical use
- Meets ACS standards
Grades of Reagents: Pharmaceutical Grade (USP, CP, BP, NF)
Pharmaceutical manufacturing
Grades of Reagents: Lab Grade
- Intermediate purity
- Educational labs
Grades of Reagents: Pure Grade
Lower grade
Grades of Reagents: Technical/Commercial
Non testing purposes (cleaning chemicals)
Properties of Solutions: Concentration
Ratio; solute and diluent
Properties of Solutions: % Solution
- w/v
- v/v
- w/w
Properties of Solutions: Concentrated
Diluted