2 Non Traumatic Urologic Conditions and Emergencies Flashcards
(105 cards)
Accumulation of normally dissolved solids from kidney, forming a stone
Urolithiasis/Nephrolithiasis (name depends on where it gets stuck)
Once a kidney stone is ______ in size, it becomes symptomatic with pain and obstruction of the ureter
2-3 mm
Most common type of renal stone
Calcium salt
RADIOPAQUE
Type of renal stone associated with infection
Struvite
RADIOPAQUE
Type of renal stone associated with gout
Uric acid
RADIOLUCENT
Rarest kind of renal stone
Cystine
What is the typical history for a patient with renal colic?
Unilateral flank pain that is characteristically:
• Very sudden onset (colicky)
•Radiates to the groin as the stone passes into the lower ureter
• May change location, from the flank to the groin
• The patient cannot get comfortable, and may roll around in agony. Pain equal to labor
• Associated with N/V
• Urinary frequency - dark urine (b/c of blood)
DDx for renal colic
Acute pyelonephritis
Papillary necrosis (sickle cell, NSAID abuse)
Appendicitis/biliary colic/bowel obstruction
AAA (if elderly, 1st stone)
GYN emergency (ectopic/ovarian torsion)
Testicular torsion/epididymitis/hernia
Components of the physical exam for renal colic
Exam of abdomen, back, and chest
Male - GU
Female +/- pelvic
Vitals - check temp and BP
Labs and Imaging for renal colic
CBC, BMP, UA, hCG, NCCT scan or US
BUN/Cr for renal compromise
KUB xray - misses 40% but urology uses these
Non Contrast CT is 94-100% specific
Renal US - use in pregnant women, children, patient with previous hx of stones
Renal US sees ____% of stones, and helps identify _______
65%
Hydronephrosis
Sensitive (65-96%) and specific (100%) for detection of stones
Size of a renal stone predicts…
The chance of spontaneous expulsion
1mm or less - spontaneous passage of 87%
2-4mm - 76%
5-7mm - 60%
>9mm - only 25% spontaneously pass
Majority of patients have renal stones that are ____ in size
2-4 mm
These have 76% chance of passing spontaneously
Treatment for renal colic for stones between 5-8mm
Pain relief (NSAIDs) Anti nausea Abx Alpha 1 blockers (ie flomax) Watchful waiting
Admit if “sick” appearing
Temporary relief can be provided to renal colic patients who are not passing the stone on their own by…
Insertion of a JJ stent
Percutaneous nephrostomy tube
Definitive treatment of a ureteric stone
If intractable pain, fever, renal function compromise, or >4 weeks
ESWL (lithotripsy - “shock waves”)
PCNL (nephrolithotomy - 1 cm incision)
Ureteroscopy
Open surgery (very limited)
What is the utility of medical expulsion therapy for renal stones?
CCB or alpha-blockers (Flowmax)
Stones <4-5mm - there is no benefit (but the dumb ass dick doctor will still order it)
Stone 5-10mm - increased passage NNT 5
Painful inability to void, with relief of pain following drainage of the bladder by catheterization
Acute urinary retention
Most common cause of acute urinary retention in men over 50
Obstructive due to prostatic hyperplasia
What are the different possible causes of acute urinary retention?
Obstructive - BPH, infection of prostate, constipation
Pharmacologic - antihistamine, decongestants, anticholinergics, narcotics
Inflammatory
Neurogenic - spinal cord trauma or tumor, MS
SSx of acute urinary retention
Abdominal distension Bladder US shows distension Large amount of urine post catheter placement - post void residual (PVR) BMP +/- renal failure UA +/- infection
Normal capacity of the bladder
<50-100 ml
Use clinical judgement if 50-100ml
Abnormal if >100-150ml
Initial management of acute urinary retention
Urethral catheterization
Suprapubic catheter (SPC)
CBI (continuous bladder irrigation) if blood clots present
Late management - treat the underlying cause
What do you need to do AFTER treating urinary retention?
Monitor pt for 2-4 hrs post decompression
May develop post obstructive diuresis
Discharge pt with drainage bag and follow up 3-5 days (urology)