Final answer:
The ideal fluid for a child post-tonsillectomy is warm broth, due to its soothing properties and low risk of irritating the throat. For intravenous hydration, isotonic saline is used to ensure compatibility with body fluids.
Step-by-step explanation:
The best choice for fluid replacement that a nurse can offer a child who has just had a tonsillectomy is d) Warm broth. This is because warm broth is soothing, hydrating, and less likely to cause irritation to the throat after surgery. Hot beverages like tea might be too harsh on the sore throat, while ice-cold water could cause discomfort. Citrus juices are acidic and could also irritate the sensitive post-operative throat tissue.
When dealing with a dehydrated human patient requiring intravenous fluids, the medical treatment would typically be b) saline at a concentration that is isotonic with respect to body fluids. This is because isotonic saline solution has the same concentration of solutes as body fluids, which helps to hydrate the patient without causing the cells to shrink or swell.