This is the 274th most frequent Lithuanian word.
nustatytas
"Established" or "determined."
The word 'nustatė' (third person past tense form of 'nustatyti') is used here to mean 'established' or 'set', showing the action of formally creating or defining something.
Mokytojas nustatė griežtą tvarkaraštį.
The teacher established a strict schedule.
The word 'nustatyta' is used in a past passive participle form to indicate that the action of determining a diagnosis was completed for the patient.
Pacientui buvo nustatyta teisinga diagnozė.
The patient was given a correct diagnosis.
Here, 'nustatytos' as a plural past passive participle describes the state of being properly set or made for the corrections.