What are the possible causes of a temperature elevation above 38°C in the first 48 hours after surgery according to the chapter?

Possible causes of a temperature elevation above 38°C in the first 48 hours after surgery include respiratory congestion, atelectasis, and less frequently, dehydration.

In the first 48 hours post-surgery, a moderate elevation in temperature above 38°C is primarily attributed to respiratory congestion or atelectasis. Dehydration can also contribute, but it is less common as a cause during this period.