What's the plural form of capillary refill? Here's the word you're looking for.
Answer
The noun capillary refill can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be capillary refill.
However, in more specific contexts, the plural form can also be capillary refills e.g. in reference to various types of capillary refills
or a collection of capillary refills.