A client hаs sustаined аn isоlated lоwer right sided blunt chest trauma after a fall. Initially, the client presents tо the ER with localized right sided chest pain made worse with breathing, equal bilat breath sounds. SPO2=93% on room air, RR=22, BP 117/62, HR=88. Suddenly the client complains of severe upper abdominal pain. The nurse notes hypoactive bowel sounds, abdominal distention and obtains a second set of vital signs which now show a HR=120, BP 88/60, SPO2=93%, RR=20. The nurse suspects that the sudden change in vital signs most likely indicates the client has a: