Urinary Tract Infection (UTI)

• One of the “Big Three” urinary disorders (UTI, kidney stones, BPH).

• Most common bacterial infection in women.

• Main pathogen: E. coli.

• Location: Urinary tract (normally sterile) becomes infected when protective mechanisms fail.

Pathophysiology

• Normal defense: Sterile urinary tract with intact pH and sphincter function.

• Disruption causes:

  • Chemical malfunction: Altered urine pH (e.g., from soaps, douches, medications).

  • Mechanical malfunction: Weak sphincter (e.g., from childbirth) → allows reflux.

  • User malfunction: Poor hygiene or incorrect wiping (back → front).

Risk Factors

• Urinary retention (urine stasis).

• Indwelling catheters or urinary devices.

• Poor hygiene.

• Female anatomy: Short urethra; proximity to anus.

• Use of feminine hygiene products (douches, sprays, perfumed washes).

• Diabetes: Glucose in urine promotes bacterial growth; impaired immunity.

• Constipation: Stool near rectum = bacterial source.

• Pregnancy: Frequent urination, incomplete emptying, and hygiene challenges.

Types of UTIs

Type	Location	Other Name	Notes
Lower UTI	Bladder	Cystitis	Most common form
Upper UTI	Kidneys	Pyelonephritis	May progress to sepsis
Urethritis	Urethra	—	Often accompanies bladder infection
Urosepsis	Systemic	—	UTI spread into bloodstream

Complicated vs. Uncomplicated

• Uncomplicated: Healthy individual, no comorbidities.

• Complicated: Occurs in patients with risk factors (e.g., diabetes, catheters, immune issues, structural abnormalities).

Expected Urinalysis Findings

Finding	Interpretation
RBCs present	Bleeding or irritation
WBCs present	Infection/inflammation
Pus (pyuria)	Infection
Casts present	Indicates upper UTI (kidney involvement)
Nitrates positive	Confirms bacterial activity
Positive urine culture	Identifies organism
Bacteria present	Confirms infection
Protein present	✗ Usually kidney disease, not UTI
Glucose present	✗ Suggests diabetes, not infection

Clinical Manifestations

Lower UTI (Cystitis)

• Dysuria (painful urination)

• Frequency and urgency

• Hematuria (blood in urine)

• Suprapubic pain or pressure

• Difficulty starting stream / incomplete emptying

Upper UTI (Pyelonephritis)

• All lower UTI symptoms plus:

  • Flank or back pain

  • Fever and chills

  • Fatigue, malaise

  • Loss of appetite

  • Nausea/vomiting

  • Possible urosepsis: hypotension, tachycardia, shock

Older Adults

• May present atypically:

  • Confusion, disorientation

  • Weakness, fatigue

  • Abdominal pain (no dysuria)

Diagnostics

• Urinalysis (UA): Detects WBCs, nitrates, leukocyte esterase, bacteria, RBCs.

• Urine culture: Identifies organism; determines antibiotic sensitivity.

• Ultrasound: Checks for obstruction or complications.

Specimen collection:

• Use sterile technique.

• Clean-catch: void first, then collect midstream sample.

• For catheterized patients: draw from sterile port, not drainage bag.

Treatment Goals

Improvement Indicators:

• Less pain, urgency, and frequency

• Afebrile

• Negative urine culture

• Clearer urine

Worsening Indicators:

• Persistent pain or fever

• Continued positive cultures

• Signs of sepsis or systemic spread

Medications

1. Phenazopyridine (Azo)

• Purpose: Symptomatic relief (burning, pain).

• Not an antibiotic.

• Teaching: Urine may turn orange or red.

• Use short-term only.

2. Antibiotics

Drug	Notes
Trimethoprim-sulfamethoxazole (Bactrim)	Check for sulfa allergy; watch for rash/itching.
Nitrofurantoin (Macrobid)	Can cause brown urine, peripheral neuropathy, hepatotoxicity. Report cough, chest pain, dyspnea, or rash.

General Teaching for Antibiotics:

• Complete entire course.

• Report if no improvement in 2–3 days.

• Assess for allergies and renal function.

• Watch for superinfection (e.g., C. diff, diarrhea).

• Take with food to reduce GI upset.

• Monitor IV antibiotics carefully; push slowly (5–10 min).

Clinical Interventions:

• Pain management: Warm compresses or baths for relief.

• Hygiene: Encourage proper perineal care and handwashing.

• Fluids: Encourage ≥6–8 glasses/day to flush bacteria.

• Safety: Fall precautions for frequent urination.

• Assessment: Track pain, frequency, dysuria, and urine appearance.

Patient Education:

Do:

• Empty bladder regularly and completely.

• Void before and after sexual activity.

• Drink plenty of fluids.

• Wipe front to back.

• Maintain bowel regularity (high fiber).

• Consider cranberry juice or tablets for prevention.

Avoid:

• Douches, sprays, perfumed washes.

• Caffeine, alcohol, spicy foods, citrus, chocolate (bladder irritants).

• Tight clothing or prolonged wet garments.

Summary

• Hallmark symptoms: Dysuria, frequency, urgency.

• Primary cause: E. coli.

• Best prevention: Proper hygiene, hydration, and bladder emptying.

• Main treatment: Antibiotics (based on culture results).

• Complication risk: Pyelonephritis → urosepsis if untreated.

Kidney Stones (Urolithiasis) — Study Notes

Overview

• Definition: Formation of solid mineral crystals (calculi) in the urinary tract.

• Common sites: Kidneys, ureters, bladder.

• Major risk: Dehydration → concentrated urine → crystal formation.

• Can obstruct urine flow, cause severe pain, and damage kidneys.

Pathophysiology

• Normally, urine contains substances that prevent crystal formation.

• When these balances are disrupted, salts precipitate and form stones.

• Obstruction increases pressure, leading to renal colic and hydronephrosis (swelling of the kidney due to urine backup).

Common Stone Types

Type	Composition	Notes / Causes
Calcium oxalate	Calcium + oxalate	Most common (75–80%). Caused by dehydration, high oxalate foods (spinach, nuts).
Struvite	Magnesium ammonium phosphate	Associated with recurrent UTIs (esp. Proteus bacteria). Often large “staghorn” stones.
Uric acid	Uric acid crystals	Common in gout or high-purine diets (organ meats, shellfish).
Cystine	Cystine amino acid	Rare; due to genetic metabolic disorder (cystinuria).

Risk Factors

• Dehydration or low fluid intake

• Hot climates (sweating → concentrated urine)

• Family history of stones

• High-protein, high-sodium, or high-calcium diet

• Sedentary lifestyle

• Recurrent UTIs

• Gout or hyperparathyroidism

• Prolonged immobilization

Clinical Manifestations

Feature	Description
Renal colic	Severe, sudden flank pain radiating to groin or genitals
Hematuria	Blood in urine due to irritation of urinary tract
Nausea & vomiting	From severe pain and sympathetic activation
Urinary frequency & urgency	If stone is near bladder
Oliguria / anuria	Indicates obstruction (emergency)
Restlessness, diaphoresis, pallor	Common pain responses

Diagnostics

• Urinalysis: Hematuria, crystals, pH changes.

• Non-contrast CT scan: Gold standard for stone detection.

• KUB (X-ray): Detects radiopaque stones (calcium types).

• Ultrasound: For children or pregnant patients.

• Stone analysis: Determines composition for prevention plan.

Treatment Goals

Improvement indicators:

• Pain relief

• Passage of stones

• Normal urine flow

Worsening indicators:

• Persistent or worsening flank pain

• Signs of obstruction (decreased urine output)

• Infection or fever → possible uropyelonephritis or sepsis

Medical & Surgical Management

1. Conservative (Small stones <5mm)

• Hydration: 3–4 L/day to flush stone.

• Pain control: NSAIDs or opioids.

• Alpha-blockers (e.g., tamsulosin): Relax ureter, help stone passage.

• Strain urine: Collect stone for analysis.

2. Interventional (Larger stones)

Procedure	Description
ESWL (Extracorporeal Shock Wave Lithotripsy)	Uses sound waves to break stones into passable fragments.
Ureteroscopy	Endoscopic removal via urethra and bladder.
Percutaneous nephrolithotomy	For large or staghorn stones; incision through back into kidney.
Surgical removal	For severe or recurrent cases.

Complications

• Urinary obstruction → hydronephrosis → renal failure

• UTI or pyelonephritis

• Urosepsis

• Recurrence of stones

Clinical Interventions

• Pain management: Priority — assess pain q4h; give analgesics promptly.

• Hydration: Encourage high fluid intake unless contraindicated.

• Monitor urine output: Report if <30 mL/hr.

• Strain all urine: Send stones for lab analysis.

• Ambulation: Promotes stone passage.

• Infection prevention: Monitor temperature and WBC count.

Patient Teaching

Do:

• Increase fluid intake (2–3 L/day minimum).

• Maintain balanced diet with limited sodium and protein.

• Report pain, fever, or decreased urination.

• Continue prescribed medications (especially tamsulosin).

Avoid:

• Holding urine for long periods.

• Excessive intake of oxalate foods (spinach, chocolate, tea, nuts).

• High-purine foods if uric acid stones (organ meats, sardines).

Prevention (Diet-Based)

Stone Type	Avoid / Reduce	Encourage
Calcium oxalate	Spinach, nuts, chocolate, tea	Citrus fruits (citrate prevents stones)
Uric acid	Red meat, shellfish	Low-purine diet, alkaline urine (citrate)
Struvite	Recurrent UTIs	Prompt antibiotic treatment
Cystine	Genetic	High fluid intake; medications to reduce cystine

Summary

• Classic symptom: Sharp flank pain radiating to groin.

• Main cause: Dehydration.

• Goal: Relieve pain, remove stones, prevent recurrence.

• Teaching priority: Hydration and diet modification.

• Complication: Hydronephrosis → renal damage if untreated.

Benign Prostatic Hyperplasia (BPH)

Overview

• Definition: Noncancerous enlargement of the prostate gland, common in men >50 years old.

• Pathophysiology: As the prostate enlarges, it compresses the urethra, causing urinary obstruction.

• Key point: BPH is benign (not cancer), but symptoms can mimic prostate cancer.

Pathophysiology

• The prostate surrounds the urethra just below the bladder.

• Hormonal changes with aging (↑ DHT – dihydrotestosterone, ↓ testosterone) cause hyperplasia of prostate cells.

• The enlarged gland squeezes the urethra → obstruction → retention → bladder hypertrophy → possible hydronephrosis.

Risk Factors

• Aging (especially >50 years)

• Family history of BPH

• Sedentary lifestyle

• Obesity

• High-fat diet

• Hormonal imbalance (↑ estrogen/testosterone ratio)

• Diabetes and heart disease

Clinical Manifestations

Grouped as:

Irritative (bladder response)	Obstructive (flow problem)
Frequency, urgency	Hesitancy
Nocturia (night urination)	Weak or intermittent stream
Dysuria (burning)	Dribbling after urination
Feeling of incomplete emptying	Straining to void
Possible hematuria	Urinary retention → overflow incontinence

Complications

• Urinary retention

• Recurrent UTIs

• Bladder distension or diverticula

• Hydronephrosis → kidney damage

• Post-renal acute kidney injury (from obstruction)

Diagnostics

Test	Purpose / Findings
Digital Rectal Exam (DRE)	Enlarged, smooth, firm prostate (non-tender).
PSA (Prostate-Specific Antigen)	Mildly elevated; rules out prostate cancer.
Urinalysis	Detects infection or blood.
Post-void residual (PVR)	Measures retained urine after voiding.
Ultrasound or cystoscopy	Evaluates obstruction or prostate size.

Treatment Goals

Improvement Indicators:

• Stronger urine stream

• Decreased nocturia and urgency

• Complete bladder emptying

Worsening Indicators:

• Acute urinary retention

• Recurrent infections

• Increasing residual urine volume

Medical Management

1. Watchful Waiting

• For mild symptoms (AUA score <7).

• Encourage lifestyle changes (see below).

2. Pharmacologic Therapy

Drug Class	Example	Mechanism / Notes
Alpha-1 blockers	Tamsulosin, Terazosin	Relax smooth muscle in prostate and bladder neck → improved urine flow. May cause orthostatic hypotension.
5-alpha reductase inhibitors	Finasteride, Dutasteride	Shrink prostate by blocking DHT formation; takes months for effect. May cause decreased libido or ED.
Combination therapy	Both classes	For severe symptoms or large prostate.

3. Surgical Management

Procedure	Description / Notes
TURP (Transurethral Resection of the Prostate)	Gold standard; removes obstructing tissue via resectoscope.
TUIP (Transurethral Incision of the Prostate)	Small cuts to relieve pressure (for smaller glands).
Laser ablation or microwave therapy	Minimally invasive alternatives.
Prostatectomy	For very large prostates or complications.

Post-TURP Care

• Continuous Bladder Irrigation (CBI):

  • Prevents clot formation in bladder.

  • Use isotonic solution (usually 0.9% saline).

  • Monitor urine color — light pink expected; bright red = possible hemorrhage.

  • Maintain output slightly > input (avoid overdistension).

• Monitor for:

  • Bleeding

  • Bladder spasms (may give belladonna & opium suppositories)

  • Urinary retention after catheter removal

  • TURP syndrome (fluid overload → confusion, bradycardia, hyponatremia)

Clinical Interventions

• Assess urine output, color, and clarity hourly if on CBI.

• Encourage deep breathing and ambulation (prevents DVT).

• Maintain fluid intake 2–3 L/day post-surgery unless contraindicated.

• Avoid straining, lifting, or constipation (can cause bleeding).

• Teach catheter care and signs of infection.

Patient Teaching

Do:

• Urinate at first urge.

• Drink plenty of fluids (avoid dehydration).

• Report burning, fever, or blood in urine.

• Continue follow-up PSA checks.

• Eat high-fiber foods to prevent straining.

Avoid:

• Caffeine and alcohol (increase urgency).

• Antihistamines and decongestants (cause retention).

• Prolonged sitting or driving (pressure on prostate).

Prevention / Lifestyle Modifications

• Maintain healthy weight.

• Regular exercise.

• Timed voiding schedule.

• Limit evening fluids to reduce nocturia.

• Avoid bladder irritants (spicy foods, caffeine).

Summary Table

Feature	BPH	Prostate Cancer
Growth pattern	Symmetrical, smooth enlargement	Hard, irregular nodules
Pain	Usually painless	May have back or bone pain (metastasis)
PSA	Mildly elevated	Markedly elevated
Treatment	Alpha-blockers, 5-ARI, TURP	Surgery, radiation, hormones

Key Points

• Most common cause of urinary obstruction in older men.

• Alpha-blockers provide quick symptom relief.

• Finasteride shrinks prostate gradually.

• Post-TURP: Monitor for bleeding and fluid imbalance.

• Teaching focus: Hydration, avoidance of irritants, and prompt reporting of retention.