A 16-year-old male presents to the emergency department with acute, severe pain in the left testicle starting three hours ago, accompanied by nausea but no vomiting. Physical examination reveals an abnormally high-riding left testicle and absent cremasteric reflex. What immediate intervention is critical for preserving testicular function?
Administer intravenous pain medication primarily
Emergency manual detorsion followed by orchidopexy
Immediate testicular ultrasonography to confirm torsion
Secure parental consent before any medical intervention