14.3 Hospital-Acquired Complications, Prevention Bundles & Post-ICU Syndrome

14.3 Hospital-Acquired Complications, Prevention Bundles & Post-ICU Syndrome

Clinical Scenario: A 66-year-old male with severe ARDS secondary to necrotizing pancreatitis has been mechanically ventilated in the ICU for 9 days. He has a right internal jugular central line, a radial arterial catheter, and an indwelling Foley catheter. Medications include continuous fentanyl at 75 mcg/hr, propofol at 35 mcg/kg/min, pantoprazole 40 mg IV daily, and enoxaparin 40 mg SC daily. Morning labs: platelet count 142,000/mcL, BUN 48 mg/dL, serum creatinine 2.4 mg/dL (baseline 0.9 mg/dL; estimated CrCl 26 mL/min), and an ABG on volume control (Vt 420 mL, PEEP 10 cm H2O, FiO2 0.40) showing pH 7.38, PaCO2 42 mmHg, and PaO2 86 mmHg. Physical exam shows non-blanchable erythema over the sacrum and dependent edema. The acute care nurse practitioner conducts multidisciplinary rounds to audit infection bundles, adjust VTE prophylaxis, evaluate skin staging, and initiate the ABCDEF bundle to prevent post-intensive care syndrome.

Evidence-Based Healthcare-Associated Infection (HAI) Bundles

Preventing healthcare-associated infections requires rigorous bundle compliance:

• Catheter-Associated Urinary Tract Infection (CAUTI) Bundle:
  • Strict Indications: Acute urinary retention or obstruction; hourly output titration in hemodynamic shock; healing open sacral/perineal wounds in incontinent patients; prolonged spinal/pelvic immobilization; and comfort care. Inappropriate indications include nursing convenience and routine monitoring in stable patients.
  • Bundle Elements: Aseptic insertion with sterile gloves and drape; maintain closed drainage; ensure unobstructed flow without dependent loops; maintain drainage bag below bladder level; and perform daily audits with prompt removal.
• Central Line-Associated Bloodstream Infection (CLABSI) Bundle:
  • Insertion: Hand hygiene; maximal sterile barriers (cap, mask, gown, gloves, full-body drape); alcoholic chlorhexidine (>0.5% chlorhexidine in 70% alcohol) using the manufacturer’s application technique and full air-drying time; and anatomical site selection balancing infection, mechanical and vascular-access risks. Avoid femoral access when feasible in adults; avoid subclavian access in advanced kidney disease or dialysis to preserve future access.
  • Maintenance: Daily necessity audit with prompt removal; "scrub the hub" for $\ge 15$ seconds with friction; change transparent dressings every 7 days (gauze every 48 hours) or when soiled; and apply chlorhexidine-impregnated sponges.
• Ventilator-Associated Pneumonia (VAP / VAE) Bundle:
  • Maintain head of bed elevation at $30^\circ$ to $45^\circ$.
  • Daily Spontaneous Awakening Trials (SAT) paired synchronously with Spontaneous Breathing Trials (SBT).
  • Endotracheal tubes with subglottic secretion drainage (SSD) ports for ventilation $>48$ to 72 hours (use device-specific suction settings; continuous and intermittent pressures are not interchangeable).
  • Regular oral hygiene with tooth brushing; routine chlorhexidine oral rinses are not recommended in general ICUs because benefit is unclear and harm is possible.
  • Stress Ulcer Prophylaxis (SUP) Stewardship: Assess clinically important upper-GI bleeding risk, particularly coagulopathy, shock or chronic liver disease. Use a low-dose PPI or H2 blocker in patients at risk; enteral nutrition reduces risk but does not replace prophylaxis when major risk factors persist. Mechanical ventilation alone is not an established independent risk factor in the 2024 SCCM/ASHP guideline. Review the indication daily and stop prophylaxis when risk resolves.
  • Early mobility and physical therapy.

Midline and PICC Selection and Removal

A midline remains peripheral; a PICC reaches the central circulation. Choose the device according to the infusate, anticipated duration, vein condition and complications risk. A midline is not a substitute when a therapy requires central administration. Use trained operators, asepsis and appropriate ultrasound guidance; PICC insertion requires maximal sterile barriers and confirmation of acceptable tip position before use. Review necessity daily and remove an unneeded device. During removal, use aseptic technique and gentle withdrawal, stop for unexpected resistance, inspect the removed catheter for completeness and obtain hemostasis and apply an occlusive dressing. Escalate suspected retained fragments, infection, thrombosis or extravasation.

Venous Thromboembolism (VTE) Prophylaxis & Renal Adjustments

Risk-stratify all patients using validated scoring tools (Caprini score for surgical patients; Padua score for medical patients):

• Pharmacologic Prophylaxis: LMWH is generally preferred when appropriate. A common medical regimen is enoxaparin 40 mg SC daily. Trauma and obesity require a separate weight-, age- and renal-informed protocol: WTA recommends 40 mg twice daily for most trauma patients aged 18–65 years, weighing>50 kg with CrCl>60 mL/min; older, lower-weight or moderately renally impaired patients may start 30 mg twice daily. Avoid applying one regimen to all obese or trauma patients.
• Renal Dosing Adjustments: Enoxaparin is cleared predominantly by the kidneys. In patients with severe renal insufficiency ($\text{CrCl} < 30\text{ mL/min}$) or acute kidney injury, enoxaparin accumulates, substantially increasing major hemorrhage risk. For prophylaxis with CrCl <30 mL/min, options include:
  1. Reducing enoxaparin to 30 mg SC once daily, OR
  2. Transitioning to Unfractionated Heparin (UFH) 5,000 units SC every 8 hours (or q12h), which is cleared via the reticuloendothelial system and endothelial cells independently of renal function.
• Monitoring & Mechanical Prophylaxis: Routine anti-Xa monitoring is not a universal requirement for prophylaxis; use a population-specific protocol when monitoring is indicated. In acutely or critically ill medical patients, ASH generally favors a single prophylaxis modality rather than routine combined therapy. Use intermittent pneumatic compression when bleeding risk precludes anticoagulation, and reassess daily. Surgical and trauma protocols may differ.

Hospital-Acquired Pressure Injuries (HAPIs): NPIAP Staging & Prevention

The National Pressure Injury Advisory Panel (NPIAP) stages pressure injuries by anatomical tissue depth:

• Stage 1: Intact skin with localized, non-blanchable erythema.
• Stage 2: Partial-thickness skin loss with exposed dermis. Viable, pink/red, moist wound bed or intact/ruptured serum blister. No visible fat or deeper structures.
• Stage 3: Full-thickness skin loss. Subcutaneous fat is visible; granulation tissue and epibole (rolled edges) are common. Bone, tendon, and muscle are not exposed.
• Stage 4: Full-thickness skin and tissue loss with directly exposed or palpable bone, muscle, tendon, or ligament. High risk for osteomyelitis.
• Unstageable: Full-thickness skin and tissue loss whose extent is obscured by slough or eschar. Clinical Pearl: Stable, dry, intact, non-erythematous eschar on the heels serves as the body's natural biological cover and should never be debrided.
• Deep Tissue Pressure Injury (DTPI): Intact or non-intact skin with localized, persistent non-blanchable deep red, maroon, or purple discoloration, or epidermal separation revealing a dark wound bed or blood blister.
• Multi-Modal Prevention: Individualize repositioning frequency to skin response, mobility, support surface and clinical tolerance; use dynamic alternating-pressure support surfaces; float heels with suspension boots; apply barrier creams for incontinence; optimize nutrition (protein 1.2–2.0 g/kg/day); and avoid shear during turns.

Post-Intensive Care Syndrome (PICS) & The ABCDEF Care Bundle

PICS encompasses new or worsening impairments persisting beyond acute critical illness:

• Triad of Impairments: (1) Physical: ICU-Acquired Weakness (ICUAW), including Critical Illness Polyneuropathy (CIP; axonal sensorimotor polyneuropathy) and Critical Illness Myopathy (CIM; loss of thick myosin filaments), contractures, and chronic fatigue. (2) Cognitive: Enduring deficits in executive function, memory and attention; strongly correlated with delirium duration. (3) Psychological: Depression, anxiety and PTSD may persist after critical illness. PICS-Family (PICS-F): Caregiver depression, anxiety, and PTSD.
• The ABCDEF Care Bundle:
  • A (Assess, Prevent, and Manage Pain): Routinely evaluate pain using CPOT or BPS; treat pain before sedating.
  • B (Both SAT and SBT): Coordinate daily Spontaneous Awakening Trials with Spontaneous Breathing Trials to expedite ventilator liberation.
  • C (Choice of Sedation): Target light sedation (RASS -1 to 0). Avoid benzodiazepines; use dexmedetomidine or propofol.
  • D (Delirium: Assess, Prevent, and Manage): Screen every shift with CAM-ICU or ICDSC. Restore circadian rhythms (daylight exposure, quiet nights) and provide eyeglasses/hearing aids early.
  • E (Early Mobility and Exercise): Progressive mobilization from passive range of motion to ambulation while ventilated.
  • F (Family Engagement and Empowerment): Encourage family presence, participation in rounds, and patient ICU diaries.
• Post-ICU Recovery Clinics: Interprofessional follow-up at 4 to 12 weeks post-discharge (APRNs, physical therapy, neuropsychology, pharmacy) to evaluate recovery, screen for PICS, and reconcile medications.