A Simplex (gravity set) IV system is used to administer fluids to which types of animals?

The Simplex (gravity set) IV system is designed to administer fluids based on the principle of gravity and is particularly effective for larger animals. This system relies on the height of the fluid bag to create pressure that allows the fluid to flow into the animal's bloodstream, making it suitable for larger volumes typically required by larger species. Larger animals possess greater blood volume and may need more substantial fluid administration, which gravity sets can efficiently accommodate.

In contrast, smaller or medium animals might not require large volumes of fluid, and while gravity sets can technically be used for any size, the efficiency and ease of use are more advantageous in larger animals. Exotic animals may also have unique care requirements that often necessitate specialized equipment rather than standard gravity IV systems. Therefore, the Simplex IV system is most aptly suited for large animals, justifying the selection.