Module 7: Renal and Urologic Problems Flashcards
Urinary Tract Infections (UTIs)
Most common outpatient infection
Causes
Most common pathogen: Escherichia coli (E. coli)
* 75% cases; 65% complicated UTIs
Fungal and parasitic
* Immunosuppressed
* Diabetic or kidney problems
* Received multiple courses of antibiotics
* Live in or have traveled to certain developing countries
Classification of UTI
By location - upper or lower
Pyelonephritis – renal parenchyma and collecting
system
Cystitis – bladder
Urethritis – urethra
Urosepsis – systemic
* Life threatening
* Emergency treatment
Complicated or uncomplicated
Uncomplicated
* Occur in otherwise normal urinary tract in the bladder
Complicated
* Occur in people with underlying disease or other
structural, functional problem
Antibiotic resistance
Immunocompromised
Pregnant
Recurrent infection
* At risk for pyelonephritis, urosepsis, renal damage
UTI Etiology and Pathophysiology
Urinary tract above urethra normally sterile
Defense mechanisms help prevent UTIs
Complete emptying with void
Ureterovesical junction competence
Ureteral peristalsis propels urine towards bladder
Acidic pH of urine (6.0-7.5))
Abundant antimicrobial proteins and peptides
interfere with bacterial growth
Organisms from perineum ascend urethra
GI tract: gram-negative bacilli
Contributing factors: urologic instrumentation and
sexual intercourse
Hematogenous transmission
UTIs - most common health-care associated infection
(HAI)
Catheter-associated urinary tract infections (CAUTIs)
—E.coli or Pseudomonas
Increased length of stay, costs, mortality
Clinical Manifestations - Lower UTIs
Lower urinary tract symptoms (LUTS)
Emptying symptoms
* Hesitancy, intermittency, post void dribbling, urinary retention or incomplete emptying, dysuria
Storage symptoms
* Urinary frequency, urgency, incontinence, nocturia, nocturnal enuresis
Hematuria and/or cloudy appearance
Many problems produce LUTS; often confused with UT
Clinical Manifestation.- Upper UTIs
Upper urinary tract symptoms:
Flank pain, chills, fever
Other: fatigue, anorexia, or asymptomatic
Older adults: classic manifestations absent
Nonlocalized abdominal discomfort, cognitive impairment, or generalized deterioration; often afebrile
Asymptomatic bacteriuria—colonization of bacteria in
bladder; screen and treat with pregnancy
UTI Diagnostic Studies
Initial: dipstick for nitrates, WBCs, and leukocyte
esterase
Urine culture/sensitivity
Clean-catch urine sample
History
Recurring UTIs (more than 2 to 3/yr)
Complicated UTIs
CAUTIs or HAI UTIs
UTI unresponsive to empiric therapy
Imaging: ultrasound or CT scan
UTI Drugs
Drug therapy
Uncomplicated or initial UTIs
* Trimethoprim/sulfamethoxazole (TMP-SMX)
* Nitrofurantoin Cephalexin
* Fosfomycin
* Other: ampicillin, amoxicillin, or cephalosporins
Complicated: fluoroquinolones
Fungal: fluconazole
Urinary analgesic: phenazopyridine (azo dye
Acute Pyelonephritis
Etiology and pathophysiology
Inflammation of renal parenchyma and collecting
system
* Most common: bacteria (E.coli, Proteus, Klebisella, or
Enterobacter from intestinal tract)
* Other: fungi, protozoa, or viruses
Urosepsis—systemic infection from urologic source
Pyelonephritis—initial colonization and infection
of lower urinary tract from urethra
Preexisting factor—vesicoureteral reflux (urine
moves from lower to upper urinary tract) or
dysfunction of lower urinary tract (obstruction,
stricture, or stones)
CAUTI—long-term care residents
Pregnancy-induced changes
Starts in renal medulla, spreads to cortex
Clinical Manifestations
Classic: fever/chills, nausea/vomiting, malaise,
flank pain
Other: dysuria, urgency, frequency
Costovertebral angle (CVA) tenderness
Acute Pyelonephritis Diagnostic Studies
Urinalysis: pyuria, bacteriuria, hematuria; WBC
casts
Urine cultures and sensitivities
Blood cultures
Decreased kidney function tests
Ultrasound
CT scan—preferred imaging study
Acute Pyelonephritis Care
Mild symptoms (outpatient or short inpatient)
Fluids, NSAIDs, follow-up cultures and imaging
Antibiotics: oral 5 to 14 days; IV to oral 14 to 21 days
* Sensitivity guided
Severe symptoms (as above except)
IV fluids until oral tolerated
Combination parenteral antibiotics
Relapses—6 weeks antibiotics
Recurrent—prophylactic antibiotics
Urosepsis—monitor for and treat for septic
shock to prevent irreversible damage or death
Health promotion and maintenance
Similar to UTIs
Early treatment of UTIs to prevent ascending infection
Regular medical care with structural abnormalities
Patient teaching
Disease process
Take medications as prescribed
Follow-up care
Signs and symptoms of relapse or recurrence
Adequate fluid intake (8 glasses/day)
Rest
Chronic Pyelonephritis
Kidneys inflamed cause scarring leading to loss of
renal function
Result from anatomic abnormalities or recurrent
infections of upper urinary tract
Diagnosis: radiologic imaging and biopsy
Treatment: treat infection and underlying
contributing factors
Prevent progression to end-stage renal disease
(ESRD)
Urethritis
Inflammation of the urethra due to bacterial or viral
infection
Trichomonas or monilia, chlamydia, or gonorrhea
Males—sexually transmitted; see discharge, dysuria,
urgency, and frequency
Females—diagnosis difficult; see LUTS
Treatment: antimicrobials, sitz baths
Patient teaching: avoid vaginal sprays, perineal
hygiene, no sex for 7 days, and contact partners
Urethral Diverticula
Localized outpouchings of urethra from enlarged
periurethral glands
Incidence: women more than men
Urethral: trauma, instrumentation, or dilation;
vaginal delivery, or frequent infections
Symptoms: dysuria, post void dribbling,
frequency, urgency, suprapubic discomfort,
incomplete bladder emptying, incontinence, or
asymptomatic (women); hematuria, cloudy urine,
vaginal wall mass with purulent discharge
Diagnosis
Ultrasound and MRI
Voiding cystourethrography (VCUG)
Urethroscopy
Treatment (surgical)
Transvaginal diverticulectomy
Marsupialization (Spence procedure)
Urethroscopic surgical excision
Complications
Incontinence, infection, bleeding, fistula
Interstitial Cystitis (IC)/
Painful Bladder Syndrome (PBS)
IC—chronic, painful, inflammatory disease of the
bladder; IC causes PBS
Urgency, frequency, bladder/pelvic pain
Urinary pain not attributed to other causes
Etiology: unknown
Possible factors:
* Neurogenic hypersensitivity
* Mast cell changes in muscle or mucosal layer
* Infection (unusual organism)
* Toxic substance in urine
Clinical Manifestations
and Diagnostic Studies
Primary clinical manifestations: pain and
bothersome LUTS
Severe: void more than 60 times/day-night
Pain: usually suprapubic but may involve perineum
Increased pain with bladder filling, postponed
urination, physical exertion, suprapubic pressure,
certain foods, emotional distress
Decreased pain with voiding (temporary)
Often misdiagnosed as chronic or recurring UTI or
chronic prostatitis; diagnosis of exclusion
Remissions and exacerbations
Interstitial Cystitis (IC)/
Painful Bladder Syndrome (PBS) Treatment
Treatments
Nutrition and drug therapies
* Reduce intake of bladder irritants
* Calcium glycerophosphate—reduces irritation
Stress management strategies
Tricyclic antidepressants, analgesics, antihistamines
Physical therapy and bladder hypodistention
Botox; cyclosporine A
Surgery—with debilitating pain
Glomerulonephritis
Inflammation of the glomeruli
Also see tubular and interstitial changes, vascular
scarring and hardening (glomerulosclerosis);
affects both kidneys
3rd leading cause of ESRD in United States
Associated conditions: kidney infections,
nephrotoxic drugs, immune disorders, systemic
diseases
Acute: sudden symptoms; temporary or reversible
Chronic: slow, progressive; irreversible renal
failure
Acute Poststreptococcal Glomerulonephritis
Common type of acute glomerulonephritis
Common in children, young adults, and adults
more than 60 years old
Develops 1 to 2 weeks after an infection of
tonsils, pharynx, or skin by nephrotoxic strains of
group A -hemolytic streptococci; form antibodies
to streptococcal antigen
Exact mechanism unknown
Clinical Manifestations
Generalized edema, hypertension, oliguria, hematuria,
varying degrees of proteinuria, fluid retention
Periorbital edema first then progresses to total body
including ascites and peripheral edema
Smoky urine—bleeding in upper urinary tract
Proteinuria—varies with glomerulonephropathy
HTN—increased ECF volume
Abdominal or flank pain
May be asymptomatic; found on routine urinalysis
Diagnosis
H & P
Antistreptolysin-O (ASO) titers
Decreased complement components
Renal biopsy—confirmation
Dipstick urinalysis and urine sediment microscopy
* Erythrocytes/casts
* Protein
BUN and serum creatinine—renal impairment
95% recover completely or improve with
conservative treatment; important to recognize
or can progress to chronic glomerulonephritis
Management—symptom relief
Rest—decreased inflammation and HTN
Restrict Na+ & fluids/ administer diuretics—
decreased edema
Restrict protein—decreased BUN
Antibiotics—if streptococcal infection present
Prevention
Early diagnosis and treatment of sore throats and skin
lesions
Positive streptococci culture—antibiotics
* Patient teaching: take entire prescription
Personal hygiene with skin infections
Chronic Glomerulonephritis
Syndrome of permanent and progressive renal
fibrosis can progress to ESRD
No history of kidney disease
Alport syndrome—inherited
Symptoms develop slowly; unaware
Found coincidentally with abnormal UA, increased
BP, or increased serum creatinine
Decreased renal function causes ESRD (over
several years)
Manifestations
Hematuria, proteinuria, urinary excretion of formed
elements (RBCs, WBCs, casts)
Increased BUN and creatinine
Diagnosis
H&P, exposure to drugs (NSAIDs), microbial infections,
and viral infections
Evaluate for immune disorders
Ultrasound and CT scan; renal biopsy
Treatment: depends on cause
Symptomatic and supportive care
Anti-glomerular Basement
Membrane Disease
Formerly called Goodpasture syndrome
Autoimmune disease—antibodies attack glomerular
and basement membranes
Kidney and lung damage from antibody binding
causes inflammatory reaction and complement
activation
Rare disease; occurs age 30’s to 60’s
Clinical manifestations
Flu-like and pulmonary symptoms
Renal involvement
Management
Corticosteroids
Immunosuppressive drugs
Plasmapheresis
Rituximab
Dialysis
Renal transplant
Nursing
Smoking cessation
Critical care: as for AKI and respiratory distress
Maybe fatal from hemorrhage and respiratory failur
Rapidly Progressive
Glomerulonephritis
Glomerular disease with glomerular crescent formations; loss of renal function in days to months
3 types
* Anti-GBM disease
* Due to immune complex disease
* Due to pauci-immune disease
Manifestations
* HTN, edema, proteinuria, hematuria, RBC casts
Treatments: correct fluid overload, HTN, uremia, and injury to kidney
* Corticosteroids, cyclophosphamide, plasmapheresis
* Dialysis and transplant
Nephrotic Syndrome
Glomerulus permeable to plasma protein causing
proteinuria leading to low albumin and edema
Etiology and clinical manifestations
Minimal change disease most common cause in children
1/3 of adults have systemic disease
Peripheral edema, massive proteinuria, HTN,
hyperlipidemia, hypoalbuminemia, foamy urine
* Decreased albumin; ascites and anasarca when severe
hypoalbuminemia is present
* Immune response altered results in infection
* Hypocalcemia and skeletal abnormalities
* Hypercoagulability
Treatment depends on cause
Goals - cure or control primary disease and relieve
symptoms
* Corticosteroids and cyclophosphamide
* Manage diabetes
* ACE inhibitor, ARB, diuretics
* Antihyperlipidemic drugs
* Anticoagulants
* Low-sodium, moderate protein diet; small, frequent meals
Nursing - manage edema; provide support
* Daily weights, accurate I & O, measure abdomen/extremities
* Avoid infection
Obstructive Uropathies
Urinary obstruction—anatomic or functional
condition that blocks or impedes the flow of urine
Congenital or acquired
Damage occurs above level of obstruction
* Severity depends on location, duration, amount of
pressure or dilation, presence of urinary stasis or
infection
* May affect only one kidney and the other kidney may
compensate
Bladder neck or prostate
Detrusor muscle hypertrophy
Eventual large, residual urine
Bladder outlet
Increased pressure with filling or storage
Vesicoureteral reflux, hydroureter, and
hydronephrosis
Chronic pyelonephritis and renal atrophy
Partial obstruction of ureter or ureteropelvic junction
(UPJ)
Low to moderate pressure—kidney dilates without
noticeable loss of functions
Urinary stasis and reflux—increases risk of pyelonephritis
Both kidneys or only 1 functioning kidney involved—
changes in renal function occur and BUN and creatinine
increase
Progressive obstruction can lead to renal failure
Treatment—find and relieve blockage
Insertion of tube, surgery, or urinary diversion
Urinary Tract Calculi
Nephrolithasis—kidney stone disease
In United States 13% of men and 7% women
Middle-aged; risk increases with age
More frequent in:
* Whites than blacks, Hispanics, and Asians
* Those with family history
* Southeast United States; followed by Southwest, and
Midwest
* Summer (hot climate and dehydration)
* Uric acid stones in Jewish men
Risk factors for kidney stones
Metabolic
Climate
Diet
Genetic
Lifestyle
Concentration of supersaturated crystals precipitate
and form stone
Reduce risk by keeping urine dilute and free flowing
Stone formation—influencing factors
Urinary pH
* Higher pH—calcium and phosphate less soluble
* Lower pH—uric acid and cysteine less soluble
Solute load
Inhibitors in urine
Obstruction with urinary stasis
Infection with urea-splitting bacteria (struvite)
Infected stones—staghorn configuration
* Renal infection, hydronephrosis, loss of kidney function