[JNUS]

Grade 3 splenic laceration: The injury is directly over the patient's spleen.
FAST - Focussed abdominal sonography in trauma , USG in multiple sites can give the best picture about it. But, CT abdomen would be best if patient can afford. The vital initially remains stable , but sometimes later falls so rapidly terrifying emergency / trauma management doctors.

In any Blunt abdominal trauma, your first D/D should be splenic injury, because it s what kills the patient. Angiographic embolization should be method of management or open laparotomy and total/partial splenectomy. After / before splenectomy vaccination for atypical organisms like Influenza should be taken in order to prevent OPSI ( overwhelming post splenectomy infection ).