Renal Flashcards
Retroperitoneal structures
Supradrenal glands
Aorta/IVC
Duodenum
Pancreas (not tail) Ureters Colon (not transverse) Kidneys Esophagus Rectum
Kidney embedding medium
Gerota fascia
BPH vs. cancer in urinary retention
BPH is transitional epithelium around the urethra (early urinary retention)
Cancer is outer cells so no retention until late
60-40-20 rule of fluid weight
TBW-60 (heavy water assay)
ICF-40
ECF-20 (inulin/mannitol assay)
(ECF is 75% interstitial and 25% plasma (radio-albumin assay))
Cardiac output and renal flow
Average cardiac output is 5L/min
25% goes to the kidneys
Urinary glucose resorption
Over 200 mg/dL start splay
Over 350 mg/dL true transport maximum
PTH effect on proximal tubule and early distal convoluted tubule
Activates adenylate cyclase to increase cAMP and inhibit Na-phosphate cotransport
Can measure cAMP in urine
PTH puts PO4 in Pee
Increases Ca absorption in eDCT
Four factors stimulating renin release
1) Fall in BP sensed by the JGA
2) increased renal parasympathetic activity
3) B1 adrenergic stimulation
4) decreased sodium delivery to macula densa
Three mechanisms of angiotensin II
1) generalized blood vessel constriction (especially efferent)
2) activation of aldosterone
3) stimulation of Na-H exchange at the proximal convoluted tubule
ADH secretion stimulus
1) osmolarity (most important)
2) blood pressure
Degree of acid-base compensation
Never complete back to 7.40
If normal then secondary opposite process at play
Delta/delta analysis of mixed anion gap disorder
F
Lucent kidney stones
DNA related
Xanthine and uric acid
treat with urine alkalinization (k-citrate)
analgesic nephropathy
tubulointerstitial nephritis
WBC casts
can cause decreased blood flow and papilla necrosis
sloughing can cause blockage
FSGS association
Usually african american or hispanic
heroin or IVDU
Obesity