رجل عمره ٦٤ سنة في العناية بعد جراحة تحويل الشرايين التاجية بساعتين، ما زال على جهاز التنفس. حرارته ٣٥٫٢، وبدأ يرتجف بشدة، والضغط ١٤٢/٨٨، والنبض ١١٢، والتشبع نزل من ٩٨٪ إلى ٩٤٪. لماذا يهتم الممرض بتدفئته بسرعة؟

A 64-year-old man in ICU two hours after CABG is still ventilated. His temperature is 35.2 °C and he has started shivering vigorously; BP 142/88, HR 112, SpO2 has fallen from 98% to 94%. Why is the nurse concerned to rewarm him quickly?

1. Shivering raises oxygen consumption and cardiac workload
2. Cold only raises the blood glucose
3. Cold stops wound bleeding, so it needs no treatment
4. Shivering is an early sign of wound infection

Answer: A) Shivering raises oxygen consumption and cardiac workload. Hypothermia is common after heart surgery; shivering increases oxygen demand and causes vasoconstriction and hypertension, while hypothermia itself impairs clotting and promotes arrhythmias. Gradual rewarming is core care.