Eduovisual
Multisystem Processes & Disorders
Catheter-associated urinary tract infection
— Most common healthcare-associated infection in the US; ~70–80% of hospital UTIs are catheter-associated.
— Risk of bacteriuria rises ~3–7% per catheter-day; by day 30, virtually 100% are colonized.
— Non-reimbursable "never event" under CMS Hospital-Acquired Conditions — direct hospital financial penalty.
— New fever (>38.0°C) without alternative source
— Suprapubic or costovertebral angle tenderness
— New-onset delirium or hemodynamic instability in elderly/spinal cord injury patients
— Rigors, malaise, lethargy with no other cause
— Acute hematuria, new pelvic discomfort, autonomic dysreflexia in SCI
— Cloudy or malodorous urine alone
— Pyuria alone in an asymptomatic catheterized patient
— Positive culture without symptoms = catheter-associated asymptomatic bacteriuria (CA-ASB) — do NOT treat (except pregnancy or pre-urologic procedure with mucosal trauma).
Board pearl: The single highest-yield Step 3 trigger is "catheter in place >2 days + new fever + no other source." Conversely, "cloudy urine, no fever, no symptoms" in a catheterized nursing home patient = CA-ASB → reassess catheter necessity, do NOT culture, do NOT treat. Reflexive treatment of asymptomatic bacteriuria is a major patient-safety and antibiotic-stewardship error tested explicitly.
— Post-op day 3 patient with Foley still in place develops temperature 38.6°C, mild flank discomfort, leukocytosis. No cough, no line erythema, no diarrhea, no wound issues — urinary source rises to the top.
— ICU patient with chronic indwelling catheter develops new hypotension, lactate elevation, and altered mentation → suspect urosepsis from CAUTI.
— Elderly: Often present with delirium, falls, anorexia, or functional decline rather than dysuria; fever may be blunted (≥37.2°C oral or 1.1°C above baseline is significant).
— Spinal cord injury: Loss of typical dysuria; clues are autonomic dysreflexia (HTN, headache, sweating above lesion), increased spasticity, new incontinence around catheter, cloudy malodorous urine WITH systemic symptoms.
— Pregnancy with catheter: Even asymptomatic bacteriuria warrants treatment due to pyelonephritis/preterm labor risk.
— Date catheter inserted, indication, who placed it, sterile technique documented
— Has catheter been manipulated, disconnected, or had reflux of urine from bag?
— Recent antibiotics (selects for resistant organisms, Candida)
— Prior urine cultures and resistance patterns
— Stones, stents, neurogenic bladder, obstruction (complicated UTI features)
— Immunosuppression, diabetes, transplant status
— Rigors, CVA tenderness, hypotension, lactate >2, tachypnea, AMS — meets Sepsis-3 / qSOFA.
Step 3 management: First reflex on a febrile catheterized patient is "Does this catheter still need to be here?" — review the indication every day. If indication is gone, remove the catheter as part of the diagnostic and therapeutic plan, then obtain cultures from a freshly placed catheter or clean-catch specimen — NOT from the old indwelling catheter, which reflects biofilm flora rather than true infecting organism.
— Temperature trend (compare to baseline, especially in elderly/SCI where 37.2°C may be significant)
— Heart rate, BP, RR, SpO₂ — calculate qSOFA (RR ≥22, SBP ≤100, AMS) and lactate if any concern for sepsis.
— Mean arterial pressure <65 mmHg after 30 mL/kg crystalloid = septic shock → ICU.
— Suprapubic tenderness, palpable distended bladder (suggests obstruction or catheter malfunction)
— Costovertebral angle (CVA) tenderness — unilateral suggests pyelonephritis or obstructed/infected kidney
— Inspect catheter site: pericatheter purulence, erythema, erosion, traumatic insertion injury
— Verify catheter is draining, kink-free, bag below bladder level (basic safety check)
— In males: examine prostate gently (avoid vigorous massage — bacteremia risk); tender boggy prostate = acute bacterial prostatitis, changes antibiotic duration to 4–6 weeks
— In females: pelvic exam if discharge or to exclude tubo-ovarian source
— Mental status — new delirium in elderly is often the only sign of CAUTI/urosepsis
— In SCI: BP surge, bradycardia, headache, flushing/sweating above lesion = autonomic dysreflexia, a hypertensive emergency — sit patient upright, remove stimulus (often the obstructed catheter), nifedipine/nitrates if SBP >150.
— Mottling, prolonged cap refill, cool extremities → distributive shock
— Rash (suggests alternative diagnosis or drug reaction)
— Lungs, lines (CLABSI), surgical wounds (SSI), abdomen (C. difficile, cholecystitis), DVT, drug fever.
Key distinction: Suprapubic tenderness + fever + catheter = lower-tract CAUTI; add CVA tenderness, rigors, or hemodynamic instability → upper-tract / urosepsis, which mandates blood cultures, broader empiric coverage, and consideration of obstruction requiring urgent decompression (percutaneous nephrostomy or stent).
— Pyuria (WBC >10/hpf) is sensitive but not specific in catheterized patients — nearly all colonized catheters show pyuria.
— Absence of pyuria has high negative predictive value — argues strongly against CAUTI; look elsewhere for the fever.
— Nitrites suggest Enterobacterales; leukocyte esterase supports inflammation but again nonspecific with catheter.
— Do NOT culture from the collection bag or from a long-dwelling catheter (biofilm flora).
— If catheter has been in >2 weeks and is still needed, replace it first, then collect specimen from the new catheter port via sterile aspiration.
— If catheter can be removed, obtain midstream clean-catch or in-and-out straight cath specimen.
— Threshold: ≥10³ CFU/mL with symptoms (IDSA) — surveillance uses ≥10⁵.
— Leukocytosis with left shift supports infection
— Lactate ≥2 mmol/L = sepsis; ≥4 = high mortality, aggressive resuscitation
— Creatinine rise may indicate obstruction or AKI from sepsis
— Procalcitonin — not required for diagnosis but can support bacterial source and de-escalation timing in ICU
— Pregnancy test in reproductive-age women (affects antibiotic choice)
— Coagulation, DIC panel if septic
CCS pearl: On the CCS case, after ordering "urinalysis, urine culture, blood cultures × 2, CBC, BMP, lactate," your next move is remove or replace the indwelling catheter and start empiric antibiotics within 1 hour if sepsis criteria are met — do not delay antibiotics waiting for culture results. Document indication review and removal in the chart for a Patient Safety credit.
— Failure to improve after 48–72h of appropriate antibiotics
— Clinical suspicion of obstruction, stone, abscess, or emphysematous pyelonephritis
— Diabetes, immunocompromise, transplant kidney, known stones or stents
— Recurrent CAUTI in the same patient
— Septic shock with urinary source
— CT abdomen/pelvis with IV contrast is the test of choice for complicated upper UTI — detects obstruction, perinephric abscess, emphysematous pyelonephritis (gas in renal parenchyma — surgical emergency in diabetics), pyonephrosis.
— Non-contrast CT (CT KUB) if concern is primarily stone or contrast contraindicated.
— Renal ultrasound — first-line in pregnancy, AKI with contrast concerns, or pediatrics; detects hydronephrosis and large abscesses.
— MRI only in pregnancy when ultrasound non-diagnostic and contrast CT undesirable.
— Cystoscopy — not routine; consider if persistent hematuria, suspected catheter trauma/false passage, or to rule out foreign body or fistula.
— Post-void residual / bladder scan — assess retention after catheter removal; >300 mL suggests need for intermittent catheterization protocol.
— Urodynamics — outpatient, after recurrent CAUTI in neurogenic bladder.
— Fungal urine culture if Candida grows — distinguish funguria (often colonization) from invasive candidiasis (positive blood cultures, sepsis).
— Acid-fast and mycobacterial cultures if sterile pyuria persists with high suspicion (rare).
Board pearl: Diabetic + flank pain + fever + gas on CT in renal parenchyma = emphysematous pyelonephritis. Mortality up to 40%; requires immediate broad-spectrum antibiotics, glycemic control, and urgent urology consult for percutaneous drainage or nephrectomy. Do not manage with antibiotics alone — this is a tested distractor.
— Symptoms attributable to urinary tract + no alternative source + positive culture from properly obtained specimen.
— If asymptomatic bacteriuria: do not treat unless pregnant or pre-urologic procedure with anticipated mucosal bleeding. Document this decision explicitly.
— Uncomplicated lower-tract CAUTI: fever, suprapubic discomfort, hemodynamically stable, no obstruction, no immunocompromise → oral therapy possible, 7-day course.
— Complicated / pyelonephritis: CVA tenderness, rigors, vomiting, men, pregnancy, diabetes, immunocompromise, stones, stents, transplant → IV empirics, imaging, 10–14 days.
— Severe sepsis / septic shock: ICU, lactate-guided resuscitation, vasopressors, source control (catheter exchange ± drainage of obstruction).
— Remove the catheter if no longer indicated. Single most important intervention.
— If catheter is still needed and has been in place >2 weeks, exchange it before starting antibiotics — clears biofilm reservoir, improves cure rates.
— Relieve any obstruction urgently (ureteral stent or percutaneous nephrostomy) — antibiotics alone fail with obstructed infected urine.
— Local antibiogram (key concept)
— Prior cultures within 3 months
— Recent antibiotic exposure (ESBL, MDR risk)
— Healthcare exposure, long-term care residency
— Severity (oral vs IV; narrow vs broad)
— Allergies and renal function
Step 3 management: Three reflexive orders the moment CAUTI is confirmed clinically — (1) assess catheter necessity and remove or exchange, (2) obtain blood and properly collected urine cultures, (3) start empiric antibiotics targeted to local antibiogram within 1 hour if septic. Failure to do source control (catheter removal/exchange) is the most common reason board vignettes describe persistent fever despite "appropriate" antibiotics.
— E. coli (most common), Klebsiella, Proteus (urease, struvite stones, alkaline urine), Pseudomonas (long-term catheters, prior abx), Enterococcus, Staph saprophyticus (rare with catheter), Candida (post-antibiotic).
— Ceftriaxone 1–2 g IV q24h — workhorse for uncomplicated pyelonephritis without MDR risk.
— Piperacillin-tazobactam 3.375–4.5 g IV q6–8h or cefepime 2 g IV q8h — healthcare-associated, prior Pseudomonas, recent antibiotics.
— Carbapenem (meropenem 1 g IV q8h, ertapenem 1 g IV q24h) — known/suspected ESBL, prior resistant culture, severe sepsis with risk factors.
— Add vancomycin if Enterococcus or MRSA risk (prior colonization, recent hospitalization).
— Fluoroquinolone (ciprofloxacin 500 mg BID or levofloxacin 750 mg daily) if local E. coli resistance <10%.
— TMP-SMX DS BID if susceptibility known.
— Avoid nitrofurantoin and fosfomycin for upper-tract infection — inadequate tissue levels.
— Narrow within 48–72h based on culture and susceptibility — antibiotic stewardship metric.
— Switch IV to PO once afebrile 24–48h, tolerating oral, hemodynamically stable.
— Uncomplicated CAUTI with prompt symptom resolution: 7 days
— Delayed response or complicated: 10–14 days
— Levofloxacin 750 mg × 5 days acceptable for susceptible pyelonephritis
— Bacteremic urosepsis: 7–14 days from source control
— Asymptomatic: remove catheter, do not treat
— Symptomatic cystitis: fluconazole 200 mg daily × 14 days
— Invasive/septic: echinocandin then step down
Board pearl: Proteus → urease → alkaline urine (pH >7) → struvite (staghorn) stones. Persistent Proteus CAUTI mandates imaging for stones and urology referral for stone removal — antibiotics alone cannot sterilize a stone-harboring biofilm.
— Daily review of catheter necessity is a CMS quality measure and the single most evidence-based CAUTI prevention/treatment intervention.
— Acceptable indications (memorize): acute urinary retention/obstruction, accurate I/Os in critically ill, perioperative for select surgeries (urologic, prolonged GU/abdominal), open sacral/perineal wounds in incontinent patients, end-of-life comfort, immobilization (unstable spine, pelvic fracture).
— Unacceptable indications: nursing convenience, incontinence without wound, urine output monitoring outside ICU, prolonged post-op without specific reason.
— If catheter has been in place >2 weeks AND remains necessary, exchange before/with antibiotic initiation — disrupts biofilm.
— Intermittent straight catheterization (lower CAUTI rate than indwelling) — preferred in neurogenic bladder
— External (condom) catheter in cooperative males without retention
— PureWick / female external device
— Suprapubic catheter — lower CAUTI risk in long-term need (>30 days), preferred for chronic management
— Obstructed infected upper tract (stone, tumor, stricture): urgent percutaneous nephrostomy or retrograde ureteral stent within hours — definitive stone treatment deferred until sepsis resolved.
— Perinephric or renal abscess >3–5 cm: percutaneous drainage + antibiotics; smaller may respond to antibiotics alone.
— Emphysematous pyelonephritis: percutaneous drainage; nephrectomy if extensive parenchymal gas or failure.
— Prostatic abscess: transrectal or transurethral drainage.
CCS pearl: When a CCS case shows persistent fever and bacteremia despite appropriate antibiotics, the next order is almost always imaging for obstruction/abscess followed by urology or IR consult for drainage — not antibiotic escalation. Source control beats spectrum.
— Up to 50% of LTC residents have asymptomatic bacteriuria — do not screen or treat unless symptomatic.
— Symptoms are often nonspecific: delirium, falls, anorexia, functional decline. Before attributing to UTI, evaluate for dehydration, medication effects, pneumonia, C. difficile, MI, stroke.
— McGeer / Loeb criteria are used in LTC: require localizing GU signs (acute dysuria, suprapubic pain, CVA tenderness, gross hematuria, new/worsening urgency/frequency, new incontinence) OR fever plus one of these — pure delirium alone is insufficient by current criteria.
— Higher risk of C. difficile from antibiotics; choose narrowest effective agent and shortest duration.
— Cefepime, piperacillin-tazobactam, carbapenems, fluoroquinolones, TMP-SMX, vancomycin, aminoglycosides — all require renal dose adjustment; check eGFR.
— Ceftriaxone — no renal adjustment needed (hepatobiliary excretion), useful in AKI.
— Nitrofurantoin — avoid if CrCl <30 mL/min (inadequate urinary levels, neurotoxicity); also avoid in pyelonephritis at any GFR.
— Aminoglycosides — nephrotoxicity stacks on existing AKI; use only if no alternative, monitor levels and renal function.
— Most renally cleared antibiotics safe; avoid tigecycline for UTI (poor urinary levels).
— Ceftriaxone — caution in severe biliary disease (pseudolithiasis).
— Fluoroquinolones: QT prolongation (with ondansetron, methadone, antipsychotics), tendinopathy in elderly on steroids, hypoglycemia with sulfonylureas, warfarin INR elevation.
— TMP-SMX: hyperkalemia (with ACEi/ARB/spironolactone), AKI, warfarin INR rise, sulfonylurea hypoglycemia.
Key distinction: Confusion alone in an elderly catheterized patient is not enough to diagnose CAUTI. Look for fever, leukocytosis, or localizing GU findings. Empiric antibiotics for "delirium + positive UA" alone is a Step 3 stewardship trap — the answer is workup for alternative causes and observation.
— Asymptomatic bacteriuria IS treated in pregnancy (risk of pyelonephritis, preterm labor, low birth weight). Screen at first prenatal visit (12–16 wks).
— Catheter use minimized; if needed (labor epidural, C-section), remove ASAP postpartum.
— Safe agents: nitrofurantoin (avoid 1st trimester and near term — hemolysis in G6PD/newborn), cephalexin, amoxicillin-clavulanate, fosfomycin. Avoid fluoroquinolones, TMP-SMX (1st and 3rd trimesters), tetracyclines, aminoglycosides (relative).
— Pyelonephritis in pregnancy → admit, IV ceftriaxone, monitor for preterm labor and ARDS.
— Catheter use rare; intermittent catheterization preferred in spina bifida/neurogenic bladder.
— Avoid fluoroquinolones (cartilage), tetracyclines (<8 years, teeth). Cephalosporins workhorse.
— Recurrent UTI in children → VCUG and renal US to evaluate vesicoureteral reflux.
— Intermittent catheterization preferred over indwelling — lowest CAUTI rate.
— Symptoms often atypical: autonomic dysreflexia, increased spasticity, malaise — treat only when symptomatic, do not treat ASB.
— Recurrent CAUTI → urology consult for urodynamics, consider suprapubic conversion, stone surveillance.
— Treat ASB in first 1–2 months post-transplant (graft pyelonephritis risk); after that, manage like general population.
— Watch for tacrolimus/cyclosporine interactions with antibiotics (fluoroquinolones ↑ levels; rifampin ↓).
— Higher risk of emphysematous pyelonephritis, fungal UTI, abscess — lower threshold for imaging and broader empirics.
Board pearl: Pregnancy is the only routinely tested scenario where you treat asymptomatic bacteriuria outside pre-urologic procedures. Test of cure urine culture 1–2 weeks after completion; consider suppressive therapy if recurrent.
— Urosepsis / septic shock — most feared acute complication; mortality 20–40% if shock develops. CAUTI is a leading cause of secondary bacteremia in hospitals.
— Pyelonephritis with renal scarring, especially with delayed source control or obstruction.
— Renal or perinephric abscess — suspect when fever persists >72h on appropriate antibiotics.
— Emphysematous pyelonephritis — gas-forming infection, mostly in diabetics; mortality 20–40%.
— Prostatitis / prostatic abscess — in men, prolongs antibiotic course to 4–6 weeks; abscess needs drainage.
— Epididymo-orchitis — ascending infection along catheter.
— Endocarditis / vertebral osteomyelitis / psoas abscess — metastatic seeding from urosepsis, especially Enterococcus, Staph aureus.
— Urethral trauma, false passage, strictures (men)
— Bladder spasm, hematuria
— Encrustation, catheter blockage (Proteus, Klebsiella)
— Bladder stones from chronic catheterization
— Squamous cell carcinoma of the bladder with chronic indwelling catheter >10 years (classic association)
— C. difficile colitis — most common collateral damage of broad-spectrum antibiotics for CAUTI
— AKI (aminoglycosides, vancomycin, piperacillin-tazobactam combo)
— Allergic reactions, anaphylaxis
— Selection of MDR organisms (ESBL, CRE, VRE, MDR Pseudomonas)
— CMS non-payment for hospital-acquired CAUTI
— Public reporting penalties, value-based purchasing impact
— Increased length of stay (~4 days), increased cost (~$1,000–$4,500 per case)
— Recurrent CAUTI, chronic kidney disease from recurrent pyelonephritis
— Functional decline in elderly after sepsis hospitalization
Step 3 management: Persistent fever or bacteremia >72h despite appropriate antibiotic and catheter removal → imaging (CT) for occult abscess or obstruction, repeat blood cultures, echo if Enterococcus or S. aureus bacteremia to rule out endocarditis, and infectious disease consult.
— Septic shock (vasopressors needed after 30 mL/kg crystalloid)
— Lactate ≥4 mmol/L or persistent ≥2 despite resuscitation
— Respiratory failure / ARDS (urosepsis can cause)
— AKI requiring CRRT, severe metabolic acidosis
— Altered mental status requiring airway protection
— Need for invasive monitoring
— Hemodynamic instability not yet meeting shock criteria
— Bacteremia with comorbidities
— Elderly with delirium and infection
— Outpatient eligible: stable vitals, tolerating PO, no obstruction, no significant comorbidity, reliable follow-up, no pregnancy, no severe immunocompromise.
— Admit: pyelonephritis with vomiting, pregnancy, men with suspected prostatitis, immunocompromise, obstruction, failed outpatient therapy, hemodynamic concern.
— Urology: obstruction, stones, recurrent CAUTI, abscess needing drainage, suspected prostatic abscess, post-op urologic patient, neurogenic bladder optimization.
— Interventional radiology: percutaneous nephrostomy, abscess drainage.
— Infectious disease: MDR organisms (ESBL, CRE, MDR Pseudomonas), persistent bacteremia, fungemia, complicated cases, recurrent CAUTI, immunocompromised host.
— Nephrology: AKI with electrolyte derangement or RRT need, transplant kidney.
— Palliative care: chronic indwelling catheter in advanced illness — align catheter use with goals of care.
— Hour-1 bundle: lactate, blood cultures before antibiotics, broad-spectrum antibiotics, 30 mL/kg crystalloid for hypotension or lactate ≥4, vasopressors for MAP <65 after fluids.
CCS pearl: On CCS, when sepsis is triggered, the order set is fluids → cultures → antibiotics within 1 hour → lactate trend → vasopressors if MAP <65, with simultaneous catheter exchange/removal and imaging for obstruction. Forgetting source control loses major points even with perfect antibiotic selection.
— Positive culture, no urinary symptoms, no fever attributable to UTI.
— Do not treat outside pregnancy or pre-urologic procedure with mucosal bleeding.
— Distinguished from CAUTI by absence of clinical symptoms — this is the single most tested distinction.
— Patient catheterized for <2 days or removed >48 hours ago → classified as regular UTI/pyelonephritis, not CAUTI surveillance event, but treated similarly.
— Febrile man with catheter, tender boggy prostate, perineal pain. Same organisms but longer course (4–6 weeks of fluoroquinolone or TMP-SMX for tissue penetration).
— Avoid vigorous prostate massage (bacteremia).
— Unilateral scrotal pain, swelling, fever in catheterized man; Doppler ultrasound rules out torsion.
— Suprapubic pain, anuria via catheter, palpable bladder — flush or replace catheter; not infection.
— Hematuria, pain on insertion, difficulty advancing — urology consult, retrograde urethrogram.
— Recurrent obstruction, Proteus species, struvite — imaging and urology.
— Chronic pain, sterile urine — not CAUTI.
— Complications rather than differentials, but consider when fever persists despite appropriate therapy.
— Candida growth in catheterized patient on antibiotics — usually colonization; treat only if symptomatic or invasive.
Key distinction: CA-ASB vs CAUTI = symptoms. A catheterized patient with pyuria and 10⁵ CFU/mL of E. coli but no fever, no suprapubic pain, no delirium, no hemodynamic change has asymptomatic bacteriuria — the correct answer is "do not treat; reassess catheter necessity" and not "start ciprofloxacin."
— Hospital-acquired or ventilator-associated pneumonia — productive cough, new infiltrate, hypoxia.
— Pulmonary embolism — tachycardia, hypoxia, low-grade fever, immobile patient; consider in post-op.
— Atelectasis (low-grade fever POD 1–2, but rarely the sole explanation).
— Catheter site erythema, fever timed with line use, positive blood cultures with shorter time to positivity from line vs peripheral.
— Post-op patients, wound erythema, drainage, fluctuance; consider deep-space infection (intra-abdominal abscess) via CT.
— Recent antibiotics, diarrhea, leukocytosis (sometimes >20K), fever; stool PCR/toxin.
— Cholecystitis, pancreatitis, ileus with translocation, anastomotic leak in post-op patients.
— Beta-lactams (especially after >1 week), anticonvulsants, antipsychotics; eosinophilia, rash, relative bradycardia (Faget sign).
— Low-grade fever, calf swelling, immobility; D-dimer, duplex, CTPA.
— New murmur, embolic phenomena, Janeway/Osler, persistent bacteremia.
— Temporal relationship with blood products.
— Meningitis, encephalitis — headache, neck stiffness, AMS.
Board pearl: In a post-op catheterized patient with fever, work through the "5 W's" — Wind (atelectasis/pneumonia POD 1–2), Water (UTI/CAUTI POD 3–5), Wound (SSI POD 5–7), Walking (DVT/PE POD 5+), Wonder drugs (drug fever POD 7+). Pattern of onset narrows the source before broad cultures.
— Avoid unnecessary catheterization — strict adherence to approved indications.
— Aseptic insertion by trained personnel, hand hygiene, sterile technique, closed drainage system.
— Daily review of catheter necessity with nurse-driven removal protocols (single highest-impact prevention measure).
— Keep drainage bag below bladder, never disconnect, maintain unobstructed flow.
— Secure catheter to prevent traction; perform routine perineal hygiene (no antiseptic cleaning needed beyond soap and water).
— Do not use systemic antibiotic prophylaxis, antiseptic bladder irrigation, or routine catheter changes on a fixed schedule.
— Intermittent self-catheterization (preferred in neurogenic bladder)
— Condom catheter for cooperative males
— Suprapubic catheter for long-term need (>30 days) — lower CAUTI rate, fewer urethral complications
— Toileting protocols, scheduled voiding, treatment of underlying retention (alpha-blockers in BPH)
— Complete tailored antibiotic course (7–14 days)
— Provide written instructions on duration, side effects, when to return (fever, vomiting, flank pain)
— Reconcile other medications adjusted for renal function during illness
— Hand hygiene before catheter handling
— Signs of CAUTI to report (fever, suprapubic pain, hematuria, malodorous urine WITH symptoms)
— Hydration, perineal hygiene
— Urology referral, urodynamics, imaging for stones
— Consider methenamine hippurate (urinary antiseptic — evidence supports prophylaxis in selected recurrent UTI patients)
— Avoid long-term prophylactic antibiotics in chronic catheter patients — promotes resistance.
Step 3 management: The discharge order set must include explicit documentation of catheter removal or transition plan, antibiotic stop date, follow-up appointment within 1–2 weeks, and medication reconciliation — these are CMS transitions-of-care metrics and high-yield Step 3 items.
— Vitals q4h initially, trending toward de-escalation as patient improves
— Daily I/O, urine character, catheter function check
— Daily review: is catheter still indicated? Should it be removed today?
— Repeat lactate if initially elevated until <2
— Repeat blood cultures only if persistent bacteremia or new fever — not routine clearance for gram-negatives unless persistent
— Repeat blood cultures ARE warranted for S. aureus bacteremia to document clearance.
— Clinical improvement within 48–72h expected with appropriate therapy and source control
— Persistent fever beyond 72h → reimage, reassess source control, broaden coverage if culture pending
— Primary care visit within 1–2 weeks
— Urology follow-up if obstruction, stones, recurrent CAUTI, neurogenic bladder, post-procedural stent
— Renal function recheck if AKI occurred — BMP at 1–2 weeks
— No routine test of cure urine culture except in pregnancy
— Post-sepsis syndrome screening (cognitive, physical, mental health) at follow-up — especially in elderly
— PT/OT referral if deconditioning from hospitalization
— Delirium follow-up: persistence beyond 1 month warrants cognitive evaluation
— Hydration, voiding habits
— Smoking cessation (bladder cancer risk in chronic catheter patients)
— For chronic catheter patients: written care plan, caregiver training, scheduled urology touch points
— Catheter utilization ratio (catheter-days/patient-days)
— CAUTI rate per 1,000 catheter-days
— Standardized infection ratio (SIR) reported to NHSN/CMS
CCS pearl: On the management screen, advancing the clock without a catheter necessity check or without scheduled follow-up loses points. Order "social work consult" or "home health" when discharging a patient with a remaining catheter to ensure safe transition and reduce readmission.
— Hospitals are not reimbursed for the additional costs of treating CAUTI.
— Publicly reported via Hospital Compare; affects value-based purchasing scores.
— Aligns financial and clinical incentives — every clinician shares responsibility.
— Discuss indication, alternatives (intermittent catheterization, condom catheter), risks (CAUTI, urethral trauma, stricture), expected duration.
— Document indication in chart — many hospitals require electronic order with selected indication from approved list.
— Treating asymptomatic bacteriuria contributes to C. difficile, AKI, MDR organisms, and patient harm — explicit stewardship guidelines now consider unnecessary treatment a safety event.
— Document the reasoning for NOT treating positive cultures in asymptomatic patients to defend the decision medico-legally.
— Patients discharged with indwelling catheters are at high readmission risk. Hand-off must include: indication, planned removal date, follow-up provider, signs of infection, emergency contact. Failure to communicate is a sentinel-event-level safety gap.
— CAUTI events reported to NHSN as part of CMS Inpatient Quality Reporting program.
— Sentinel events (death or major harm from CAUTI-related sepsis) trigger root-cause analysis per Joint Commission.
— Long-term care residents, patients with limited English, and patients with cognitive impairment are at higher risk of unrecognized symptoms — institutional protocols should include systematic assessment.
— In advanced dementia or end-of-life care, an indwelling catheter for comfort may be appropriate; document goals discussion with surrogate decision-maker.
— CUSP (Comprehensive Unit-Based Safety Program), nurse-driven removal protocols, daily catheter rounds — proven to reduce CAUTI rates 30–70%.
Board pearl: A vignette describing "nurse-driven catheter removal protocol implemented hospital-wide" is asking about a system-level intervention that reduces CAUTI — the correct framing is process improvement / patient safety, not pharmacotherapy. Recognize the systems-thinking lens.
— E. coli — most common overall
— Proteus — urease, alkaline urine, struvite stones, "fishy" odor
— Klebsiella — ESBL risk, healthcare exposure
— Pseudomonas — long-term catheters, prior antibiotics; needs anti-pseudomonal coverage
— Enterococcus — selected by cephalosporins; ampicillin if susceptible, vancomycin if resistant, linezolid/daptomycin if VRE
— Candida — post-antibiotic, diabetics; usually colonization
— Staph aureus in urine — often hematogenous, prompts search for bacteremia/endocarditis
— Risk of bacteriuria ~3–7% per catheter-day
— Female sex, diabetes, prolonged catheterization, breaks in closed system, non-adherence to insertion technique
— Do NOT treat CA-ASB (except pregnancy, pre-urologic procedure)
— Do NOT use prophylactic systemic antibiotics for catheter
— Do NOT routinely change catheters on a schedule
— Do NOT use antiseptic bladder irrigation
— Absence of pyuria → very strong negative for CAUTI
— Always collect culture from a freshly placed catheter or after removal — never from the bag
— Imaging only if not improving, obstruction suspected, or complicated host
— Avoid unnecessary catheterization
— Bundle: aseptic insertion, closed drainage
— Check daily necessity
— Discontinue ASAP
— Educate staff, patient, caregivers
— Diabetes + flank pain + gas on imaging → emphysematous pyelonephritis
— Persistent fever >72h on appropriate abx → abscess or obstruction
— Tender boggy prostate → prostatitis, 4–6 weeks therapy
— Chronic indwelling catheter >10 years → SCC of bladder
— Proteus → struvite stones
— CMS HAC non-payment; publicly reported; CUSP and nurse-driven removal reduce rates
Key distinction: Persistent fever despite appropriate antibiotics on a catheterized patient = think source, not spectrum — image for obstruction or abscess, exchange the catheter, consult urology/IR. Antibiotic escalation without source control is a frequent wrong answer.
— 82-year-old nursing home woman with chronic indwelling catheter; cloudy urine, no fever, no suprapubic pain, no delirium; UA pyuria, culture 10⁵ E. coli. → CA-ASB; do not treat; reassess catheter necessity. Wrong answers: ciprofloxacin, TMP-SMX, nitrofurantoin.
— Post-op patient, Foley day 4, T 38.7°C, suprapubic tenderness, no other source, UA pyuria, culture pending. → CAUTI; remove catheter, obtain cultures, start empiric IV ceftriaxone.
— Patient on ceftriaxone for CAUTI × 72h, still febrile. → CT abdomen/pelvis to evaluate for abscess or obstruction; urology/IR consult, not broader antibiotics first.
— Diabetic woman with poorly controlled DM, flank pain, fever, CT with gas in renal parenchyma. → Emphysematous pyelonephritis; broad-spectrum antibiotics + urgent percutaneous drainage / urology consult.
— Asymptomatic bacteriuria at 16 weeks gestation. → Treat with cephalexin or nitrofurantoin (not first trimester for nitrofurantoin in some sources); test of cure after.
— SCI patient with sudden hypertension, headache, sweating, kinked catheter. → Sit upright, relieve catheter obstruction, treat HTN if persistent; once stable, evaluate for CAUTI.
— Hospital implements nurse-driven removal protocol and sees 50% drop in CAUTI rate. → System-level intervention; daily necessity review is highest-yield prevention.
— Repeated Proteus CAUTI in long-term catheter patient. → Imaging for struvite stones; urology referral.
— Asymptomatic candiduria, on broad antibiotics. → Discontinue catheter or antibiotics if possible; do not treat unless symptomatic or invasive disease.
— Elderly man going to SNF with catheter. → Document indication, removal plan, follow-up, signs to report; arrange home health/urology follow-up.
Step 3 management: Pattern-match by "is there a urinary symptom?" (treat vs not) → "is there source-control issue?" (remove/exchange catheter, drain abscess, relieve obstruction) → "is host complicated?" (broaden spectrum, image, consult).
CAUTI is symptomatic UTI in a patient with an indwelling catheter >2 days, where the single most important intervention is catheter removal or exchange combined with culture-directed antibiotics — and where treating asymptomatic bacteriuria is the most common, most tested, and most harmful management error.
Board pearl: When in doubt on any Step 3 CAUTI vignette, ask three questions in order — "Is the catheter still needed?" "Is there a symptom that justifies antibiotics?" "Is there a source-control problem I haven't fixed?" Answering these correctly will solve the vast majority of stems and aligns clinical, stewardship, and patient-safety priorities.