[单选] 机动车事故中患者发生股骨骨折。在回急诊科的途中，患者出现焦躁、意识障碍、呼吸频率31次/分。由已知的骨折和症状，可以推断出患者最有可能发生哪种并发症？Following a MVA in which the patient’s femur was fractured． Upon arrival to the emergency department the patient unexpectedly became restless， confused with a RR of 31 bpm． With the known of the said fracture and the symptoms， the patient is most likely experiencing what type of complication？