Renal Disorders Flashcards
Anuria
no urine production
GFR
amount of plasma filtered/ time
reflects kidney function
Uremia
toxic wastes/ urine in blood
How much urine is produced per day?
1-2 L
Glomerulus
filters blood
absorbs Na
Tubule
absorbs water, Na, glucose
excretes K, H, HCO3
Tests for Kidney Function and Uremia
creatinine
BUN
Tests for GFR
inulin clearance- best
creatinine clearance- most common
Normal Specific Gravity in Urinalysis
1.001 - 1.035
Hyaline Casts
protein in urine, only a problem if high
slows flow
Elevated in UTIs
leukocyte esterase
Presence of Bilirubin in Urinalysis
liver problems
Starvation Indicator
ketones
Creatinine Rule of Thumb
renal loss doubles for every doubling of serum creatinine above 1 mg/dL (norm)
Elevated in kidney failure
BUN
creatinine
Normal Creatinine Clearance
115 - 125 mL/min
100%
Estimate of Creatinine Clearance
100/ serum creatinine
Adult Polycystic Disease
40+
can result in cysts in liver or pancreas
Kidney Stones
most common upper tract obstruction
calcium oxalate
dull, deep pain in back
becomes severe flank pain
1 Cause of UTI
E. coli
T/F: E. coli is a lactose fermenter
True
Characteristics of Staph saprophyticus
novobiocin resistant
catalase +
coagulase -
can cause UTIs
Lower UTIs
lower abdominal discomfort
burning and pain with urination
low fever
Upper UTIs
affects kidneys
constant flank pain
high fever
Presence of WBC Cast indicates….
upper UTI
Nephritic Syndromes are characterized by….
blood in urine
RBC casts
Nephrotic Syndromes are characterized by….
massive amounts of protein in urine
Glomerulonephritis
main cause of chronic renal failure
oliguria- pee less
low GFR
Indicator for Glomerulonephritis
RBC w/ RBC cast
Causes of Acute Glomerulonephritis
post strep- pharyngitis, impitigo
Signs of Acute Glomerulonephritis
proteinuria
hematuria- cola colored
RBC cast
hypertension
Diabetic Nephropathy
glomerular capillaries thicken
causes 20% of deaths in diabetics
affects 30% of T1D
Microalbuminuria
30 - 300
predictor of future diabetic nephropathy
Opathies of Diabetes
retinopathy
nephropathy
neuropathy
Main causes of Pyelonephritis
UTI- E. coli
Klebsiela; Proteus
Pyelonephritis
progressive, deforms kidneys
responsible for 20% of ESRD
WBC cast
Chronic Pyelonephritis
loss of tubular function- cant concentrate urine
polyuria
proteinuria
Prerenal Failure
decreased blood flow to kidney
Intrarenal Failure
disrupt structures in kidney
Postrenal Failure
interfere with elimination of urine from kidney
Aminoglycosides
nephrotoxic drug
Main cause of Chronic Renal Failure
Beetus
GFR of Renal Insufficiency
20 - 50% of norm
GFR of Renal Failure
5 - 15% of norm
GFR of End Stage Renal Disease
<5% of norm