Needless needles

Question

At the moment, Medical Sciences SE has tags butterfly-needle, needles-cannula and paresthesia-pins-needles. Too many needles.

1. Should cannulas and needles be under the same tag? If so, why not have tag needles with cannulas as a synonym? Either both singular or both plural, please. I prefer both plural, but that is obviously a matter of personal taste.

2. Are butterfly needles special enough to deserve a tag? Should they be under, say, needles?

3. Colloquially, paresthesia may be known as "pins and needles", but this introduces the risk of mistagging. I propose that paresthesia-pins-needles be renamed paresthesia.

Answer 1

Created needles and renamed butterfly-needle to simply needles because I don't think there's anything special about butterfly needles that warrants a separate tag.

Renamed paresthesia-pins-needles to paresthesia.

Did not make cannula a synonym because cannulas can be of several types, many of which don't involve needles. There is currently no cannula.