Postop Respiratory Complications
Atelectasis develops within hours of surgery, but pneumonia takes days — knowing the timeline tells you which complication you're facing and what to do about it.
Core Concept
Postoperative respiratory complications are the most common serious complications after surgery, driven by anesthesia-induced alveolar collapse, splinting from pain, immobility, and residual sedation. Atelectasis is the earliest and most frequent — it typically presents within the first 24–48 hours with low-grade fever, diminished breath sounds, and crackles. It is the number-one cause of fever in the first 48 hours postop. Pneumonia follows later, usually 3–5 days postop, presenting with productive cough, higher fever, adventitious lung sounds, and consolidation/infiltrates on chest X-ray (atelectasis typically does not show infiltrates). Laryngospasm and bronchospasm are immediate threats, occurring in the PACU or shortly after extubation. Laryngospasm presents with stridor and absent air movement — intervene with jaw thrust, positive-pressure ventilation via BVM, and notify anesthesia for possible succinylcholine if unresolved. Bronchospasm presents with expiratory wheezing — administer prescribed bronchodilators (albuterol), position upright, and provide supplemental oxygen. Pulmonary embolism presents with sudden dyspnea, tachypnea, pleuritic chest pain, and hypoxemia — often around postop day 3–7; prevention includes SCDs, pharmacologic anticoagulation, and early ambulation. Nursing interventions center on prevention and early detection: incentive spirometry (10 sustained breaths per session, every 1–2 hours while awake, goal of at least 1000–1500 mL or as prescribed), early ambulation, positioning in semi-Fowler's or higher, deep-breathing and coughing exercises, and splinting the incision. Monitor oxygen saturation continuously in the early postop period and assess breath sounds every 2–4 hours. Report SpO₂ below 92% or a sudden increase in respiratory rate.
Watch Out For
Don't confuse atelectasis fever (low-grade, first 48 hours, no infiltrate on X-ray) with pneumonia fever (higher, day 3–5, infiltrates present) — the timeline and imaging are the differentiators. Students often think incentive spirometry treats atelectasis; it primarily prevents it. Laryngospasm (stridor, no air movement) is not bronchospasm (expiratory wheezing, some air movement) — the interventions differ and misidentification delays rescue.
Clinical Pearl
Think "Wind, Water, Walk, Wound, Wonder drug" for postop fever timing — Wind (lungs/atelectasis) comes first at 24–48 hours, making respiratory the first thing you investigate.
Test Your Knowledge
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