Vessels like SULTANA carried a doctor or surgeon on board. These are some of the tools of the trade that would be used to assist sick or injured sailors.
Printables:
Additional Links:
An article exploring 18th medical tools from a modern perspective.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2605303/
The BBC has a humorous but informative video on 18th century Medicine in general.