GU Obstruction Flashcards
What is a urinary obstruction?
obstruction of the flow of urine within the urinary tract
can occur at any level of the tract and at any age
Conditions that Cause Urinary Tract Obstructions?
- anatomical
- functional (not functioning properly)
Sites of obstruction?
upper urinary tract (unilateral)
bilateral vs unilateral
Unilateral - the most common causes are calculi and neuromuscular malfunction at the junction of the renal pelvis and ureter.
Bilateral - usually with lesions in the bladder base or retroperitoneal tissues.
Classification of Obstructions - Degree?
partial obstruction (enlarged prostate) complete obstruction (kidney stone)
Acute obstruction= what type of onset?
sudden
chronic obstruction=what type of onset?
slow
Outcome of Chronic Urinary Tract Obstruction?
Atrophy of renal tissue and kidney failure if both sides affected for a longer period of time.
determined by the degree and duration of urinary tract infection
what is hydrpnephrosis?
complication of UTI
Progressive dilation of renal collecting ducts and renal tubular structures.
buildup of urine causing swelling of the kidney
Clinical manifestations of Acute Upper Tract Obstruction?
Flank pain
Nausea and vomiting are common with acute obstruction.
Anuria suggests bilateral complete obstruction.
Clinical manifestations of Chronic Lower Tract Obstruction?
Urinary hesitancy.
Narrow and weak urine stream.
Dribbling at end of micturition.
Feeling of incompletely emptied bladder.
Renal calculi- complication of UTI
- solid mass of crystal (kidney stone)
- Polycrystalline aggregates composed of minerals the kidney normally excretes in urine
most common in early-middle adulthood (20-55)
more common in men than women with the exception of one type of stone associated with UTI which is more common in women
50% recurrence rate
more common in summer than winter
Etiology of Stone Formation?
-Complex process involving multiple factors that leads to stone formation and the type of stone formed.
Stones more common in?
ppl with gout/ increases uric acid increased protein intake drinking a lot of tea and fruit juice low fluid consumption genetic factors (Hx of stones/gout) warmer climate/season sedentary lifestyle recurrent UTI
Pathophysiology of Stone Formation?
- sediments from concentrate urine can form the stones
- can be formed in acidic or alkaline environments for people who produce a lot of stones
What is calculus?
abnormal stone formed in the body tissues by an accumulations of mineral salts
what is lithiasis?
stone formation
What is nephrolithiasis?
Formation of stones in the urinary tract
Types of renal stones?
calcium, uric acid, struvite, cystine
Manifestations of stones?
agony, pain, misery, kidney tender on palpation
Pain that spreads to the lower abdomen and groin
Pain that comes in waves and fluctuates in intensity
Pain on urination
Pink, red or brown urine
Cloudy or foul-smelling urine
Nausea and vomiting
Persistent need to urinate
Urinating more often than usual
Fever and chills if an infection is present
Urinating small amounts of urine
Types of Pain by Location of Stone? Renal Calyx
Renal Calyx (flank area between pelvis + diaphragm)
- dull pain
- pain intensifies when drinking
Types of Pain by Location of Stone? Renal colic
stone moves from kidney to ureters
associated with stretching of ureter
is acute and pain can be intermittent and is very intense **
tends to be in the flank area in upper outer quadrant
diaphoretic, cool clammy skin, nausea + vomiting
Diagnostic Studies?
urine analysis
Blood analysis
What to look for in urine analysis?
urine C&S
Ph level
What to look for in blood analysis?
blood urea nitrogen (BUN)
creatinine