Canula or Cannula: How To spell?
The word Canula is misspelled against Cannula, a noun meaning "A small tube of metal, wood, or India rubber, used for various purposes, esp. for injecting or withdrawing fluids. It is usually associated with a trocar."
Cannula has double "nn" is mispronounced as "n"Remember double 'NN' in between the strings ca & ula which should not be misspelled with single 'N'
Wrong Spelling:  ca-n-ula  Correct Spelling:  ca-nn-ula 
Check more misspelled words of Cannula to spell it correct.