Urinary Tract Disorders Flashcards
(184 cards)
What level of hematuria warrants investigation?
Any level should be inspected to see where it came from.
What will make a urinalysis positive for blood (hematuria)?
A reagent strip that says there is blood or more than 4 RBC/hpf.
Hematuria may be the only and first sign of what?
Early urinary tract pathology.
What are the 2 categories of hematuria?
Without casts or without proteinuria, with casts and proteinuria.
What are the types of hematuria without casts or proteinuria? (6)
Normal physiology, trauma (to urinary tract), lower urinary tract infections (usually very symptomatic), hypertension, bleeding disorders, kidney pathology (stones, tumors).
What constitutes normal physiology that can cause hematuria without casts or proteinuria? (2)
Menstrual contamination or following vigorous exercise
What are the types of hematuria with casts and proteinuria? (3)
acute glomerulonephritis, chronic glomerulonephritis, rheumatoid disease.
What would be done for patients with unexplained asymptomatic hematuria? (3)
1) Referral to urologist 2) Intravenous urogram (IVP) 3) Cystography
What may be the first and only sign of early urinary tract pathology?
Proteinuria
Name 4 reasons for developing proteinuria?
- Functional proteinuria (minimal amounts). 2. Overload proteinuria (pre-renal). 3. Glomerular proteinuria. 4. Tubular proteinuria.
What are some causes of functional proteinuria? (5)
1) Fever 2) exposure to extremes of heat or cold 3) Excessive exercise 4) emotional stress 5) Orthostatic proteinuria
What is an example of overload proteinuria (pre-renal)?
Bence-Jones proteinuria
What are some causes of glomerular proteinuria? (2)
1) Damage to glomerular basement membrane 2) Mild to moderate amounts of protein lost; usually albumin
What can cause tubular proteinuria?
Failure of tubular reabsorption of proteins that normally filter into the nephron
What would be done for patients with unexplained asymptomatic proteinuria? (2)
1) 24 hour quantification 2) referral for a urologic evaluation
Name 4 tests used to evaluate kidney function?
- Clearance test. 2. Creatinine clearance. 3. Serum blood urea nutrogen. 4. Serum creatinine.
What will the clearance test screen for?
Mild to moderate diffuse glomerular damage.
What is creatinine?
The end product of skeletal muscle metabolism.
What will levels of creatinine in serum represent?
skeletal muscle mass not activity.
When will levels of creatinine be increased and decreased?
Increased- renal disease and increased muscle mass. Reduced- females and children and people with decreased muscle mass.
The serum creatinine levels have the same significance as what?
Renal azotemia.
What is BUN?
Blood urea nitrogen that is a non-protein nitrogenous waste from protein metabolism that liberates AA and the AA go to the liver and become urea which goes to the kidneys and is placed in urine.
Increased BUN equals what?
Azotemia.
What level of kidney function is needed for the exrection of BUN and creatinine?
only 50%.