as needed
US /æz ˈniːdɪd/
UK /æz ˈniːdɪd/

1.
conforme necessário, se necessário
when or where necessary; as required.
:
•
Add water as needed to the mixture.
Adicione água conforme necessário à mistura.
•
The nurse will change the dressing as needed.
A enfermeira trocará o curativo conforme necessário.