彼は事故で重症を負い、緊急手術を受けました。
Kare wa jiko de juushou o oi, kinkyuu shujutsu o ukemashita.
He sustained serious injuries in the accident and underwent emergency surgery.
病状が悪化し、重症と診断されました。
Byoujou ga akka shi, juushou to shindan saremashita.
His condition worsened, and he was diagnosed with a severe illness.