Renal Flashcards
Anatomic changes in the urinary system caused by obstruction are referred to as
obstructive uropathy
Dilation of the ureter
hydroureter
Enlargement of the renal pelvis and calyces
hydronephrosis
Dilation of both the ureter and the pelvicaliceal system
ureterohydronephrosis
The deposition of excessive amounts of extracellular matrix (collagen and other proteins) by activated fibroblasts with associated areas of tubular atrophy
Tubulointerstitial fibrosis
When distal tubular damage occurs in the kidney what is the result?
It decreases the kidneys ability to concentrate urine and then increasing urine volume despite decrease in GFR
Ultimately the obstructed kidney cannot conserve sodium, bicarbonate, or water to excrete hydrogen or potassium this leads to
metabolic acidosis and dehydration
Kidney stones that are large and fill the minor and major calyces
Staghorn calculi
Kidney stones that are variable size are are located in the calyces in the renal pelvis or various sites along the ureter
Nonstaghorn calculi
The presence of a higher concentration of a salt within a fluid than the volume is able to dissolve to maintain equilibrium
supersaturation
Hydroxyapatite deposits that become exposed and serve as sites for calcium oxalate stone formation
Randall plaque
How does the size of the stone predict its ability to pass spontaneously?
<5 mm have a 50% chance of passing spontaneously. Stones that are 1 cm or larger have almost no chance of spontaneously passing.
Women are at greatest risk for which kind of kidney stone?
Struvite because of their increased incidence of urinary tract infection
Someone with gouty arthritis, has a high consumption of purines, and acidic urine is at high risk for which type of kidney stones?
Uric acid
These kidney stones are caused by genetic disorders of amino acid metabolism and are due to their excess in urine
Cystinuric and xanthine stone
Moderate to severe pain often originating in the posterior hypochondrium (flank) and radiating to the groin
Renal colic
Lesions that develop in the upper motor neurons of the brain and spinal cord result in a loss of coordinated neuromuscular contraction and overactive or hyperreflexive bladder function called…
dyssynergia
Lesions that develop in the sacral area of the spinal cord or peripheral nerves result in this type of bladder disorder
hypotonic, atonic (flacid) bladder function
Involuntary loss of urine associated with an abrupt and strong desire to void common in older adults.
Urge incontinence
Involuntary loss of urine during coughing sneezing, laughing, and is common in women younger then 60 and men who have had prostate surgery
stress incontinence
Involuntary loss of urine with over-distention of the bladder
Overflow incontinence
Involuntary loss of urine caused by dementia or imobility
Functional incontinence
An atonic bladder with retention of urine and distention. The full bladder is sensed but the detrusor will not contract causing an underactive bladder wyndrome with symptoms of stress and overflow incontinence.
Detrusor areflexia
A chronic syndrome of bladder contraction of reduced strength and/or duration, resulting in prolonged bladder emptying or a failure to achieve complete bladder emptying, or both within a normal time span and may be characterized by a weak stream, intermittency, hesitancy, and straining to void.
Underactive bladder syndrome
What are anatomic causes of resistance to urine flow for men and women?
Urethral stricture, prostatic enlargement in men, pelvic organ prolapse in women, and tumor compression
A narrowing of the urethral lumen and occurs when infection, injury, or surgical maniuplation produces a scar that reduces the caliber of the urethra.
Urethral stricture
What is the most common pelvic organ prolapse, in a woman, that causes bladder outlet obstruction?
Cystocele
What can happen to men that creates bladder outlet obstruction that is similar to pelvic organ prolapse in women?
Bladder herniates into the scrotum
If partial obstruction of the bladder outlet or urethra persists it leads to
urinary urgency, overactive detrusor contractions, and ultimately the bladder wall loses its ability to stretch and accommodate urine
The inability to stretch and accommodate urine is called
low bladder wall compliance
Low bladder wall compliance chronically (blank) which greatly increases the problems of (blank, blank, and blank).
elevates intravesicular pressure, hydroureter, hydronephrosis, and impaired renal function
A benign renal tumor that is solid, encapsulated, usually located near the cortex of the kidney and because they can become malignant are usually surgically removed.
Renal Adenomas