"手术后护理" can be translated into English as "postoperative care" or "post-surgery care".
"Postoperative care" is a more formal and commonly used medical term, referring to the medical care and attention given to a patient after a surgical operation.
"Post-surgery care" is a more straightforward and colloquial expression, also conveying the meaning of caring for a patient after surgery.
Both expressions are correct and can be used interchangeably in most contexts.