renal review: - Answers ...
1. filtration: - Answers 1st step in urine formation; permeable substances from the blood are filtered
into the Bowmans capsule
2. tubular reabsorption: - Answers substances needed by the body are retained
-removes material from the filtrate and returns them to the blood ie. electrolytes, glucose, water, etc.
tubular secretion: - Answers excretion of chemicals not needed by the body
ie. hydrogen, urea, drugs
urine concentration: - Answers the ability of the kidney to produce either a concentrated or dilute urine
labs for kidney function:blood urea nitrogen- BUN - Answers -checks concentration of urea in the blood
-rises with dehydration
-serum creatinine (Cr) - Answers -stable level
not reabsorbed
increase in CR causes a decrease in GFR
GFR - Answers GLOMERULAR FILTRATION RATE
urinalysis - Answers -Abnormal RBC more then a few WBC, bacteria, protein, glucose, ketones
creatinine clearance- - Answers amount of blood cleared of creatinine by the kidney in 1 minute of
filtration
-levels are related to 24 hour urine volume
-good measure of renal blood flow and GFR
GLOMERULONEPHRITIS - Answers nephritis marked by inflammation of the glomeruli of the kidney-
>thickening of GCM ->decrease in GFR (filtration rate)
what causes glomerulonephritis? - Answers -infection (post strep)- beta hemolytic strep
-immune
-chronic disease-diabetes, lupis, hypertension
-toxins
what is the leading cause of kidney failure? - Answers glomerulonephritis
, (2nd is diabetes and hypertension)
*****patho of glomerulonephritis:****** - Answers -activation of biochemical mediators of
inflammation
-antigen-antibody complex localized in glomerular capillary wall
-complement activation attracts neutrophils and monocytes
-neutrophils and monocytes release lysosomal enzymes->damage glomerular walls->increase in capillary
permeability
-membrane damage->platelet aggregation (clotting problems-bruises all over the body bc too much
clotting)
-decrease in GFR
5 year old boy- 3 day history of fever and sore throat
-strep pharyngitis- effects kidneys0 treatment amoxicilin for 14 days- 2 weeks after diagnosis, patient
returns with brown urine and edema ...what is the problem? - Answers glomerulonephritis
3 types of glomerulonephritis - Answers 1. acute
2. rapidly progressive
3. chronic
acute glomerulonephritis: - Answers group A beta hemolytic streptococcal infection skin-least common
pharyngitis=most common
how long does acute glomerulonephritis occur? - Answers onset 7-10 days after infection but symptoms
occurs 10-21 days
what is the purpose of treating Strep infection for 14 days? - Answers to PREVENT post-strep
glomerulonephritis
what will you see in patients with acute glomerulonephritis? - Answers -DARK urine (bc protein, blood
and lack of oliguria and decreased GFR)
-edema- periorbital, dependent (in lower back, feet, legs), ascites
-flank pain- back pain->swelling in abs