Postop Vascular Complications

The patient who had surgery yesterday suddenly has a swollen, warm calf and won't stop complaining about leg pain. The next complication you miss could travel to the lungs.

Postoperative vascular complications include deep vein thrombosis (DVT), pulmonary embolism (PE), hemorrhage, and shock. Virchow's triad — venous stasis, hypercoagulability, and endothelial injury — is maximally active after surgery. DVT can develop at any point postoperatively, with classic presentation often around 7–10 days; risk is present from the moment of surgery. Assess for unilateral calf swelling, warmth, and redness. Homans' sign is historically associated with DVT but is unreliable and no longer recommended — rely on objective findings and diagnostic studies (e.g., D-dimer, venous duplex ultrasound). When DVT is suspected: elevate the affected extremity, maintain bedrest, and never massage the leg — you risk dislodging the clot. A DVT becomes life-threatening when it embolizes: sudden dyspnea, tachycardia, pleuritic chest pain, and decreased SpO₂ signal PE — this is an emergency. Hemorrhage can be primary (within 24 hours, usually surgical bleeding) or secondary (after 24 hours, from infection eroding a vessel or mechanical failure such as a slipped ligature). Early hypovolemic shock presents with restlessness, tachycardia, and narrowing pulse pressure before blood pressure drops. Nursing priorities for prevention: early ambulation, sequential compression devices (SCDs) while in bed, adequate hydration, and administering prescribed prophylactic anticoagulants (e.g., enoxaparin, heparin). Key DVT risk factors include obesity, orthopedic surgery, oral contraceptive use, and prolonged immobility.

Key Distinctions

Don't confuse postop hemorrhage (tachycardia, restlessness, pallor, falling BP) with postop pain response (tachycardia with localized discomfort but stable hemodynamics and normal skin color). Students mix up primary hemorrhage (first 24 hours, surgical cause) and secondary hemorrhage (after 24 hours, infection or mechanical failure). SCDs are a nursing-initiated prevention measure; anticoagulants require a prescription — know the scope difference. Distinguish DVT (deep, potentially life-threatening, may not be visible) from superficial thrombophlebitis (visible inflamed vein, palpable cord, usually self-limiting).

Clinical Pearl

Think 'VEST' for DVT prevention: Venous compression devices, Early ambulation, Sufficient hydration, Thromboprophylaxis. Never massage a swollen calf postop — you could launch a PE.