This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
[{'content': 'Which of the following condition is not indicated for \nsurgical exposure of orbital floor in ZMC fracture? \nSelect and explain. \nA. Diplopia, B. Oedema, C. Enopthalamos, D. Non-resolving occulocardiac reflex', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The decision to intervene should be based on signs, symptoms,\xa0 and\xa0 functional\xa0 impairment.\xa0The\xa0decision\xa0need not be made hastily because ZMC fractures are not emergencies and treatment can be delayed, if necessary. However, during the first week following trauma, the soft tissue\xa0 undergoes\xa0 changes\xa0 consistent\xa0 with\xa0 the\xa0 usual sequence of wound healing. The form that they will ultimately\xa0 take\xa0 depends\xa0 on\xa0 the\xa0 underlying\xa0 bony architecture. Optimally,\xa0 fractures\xa0 are\xa0 treated\xa0 before the onset of edema from the traumatic incident. In practice, however, such timing of treatment is rarely possible.\xa0\nWhen\xa0 edema\xa0 is\xa0 moderate\xa0 to\xa0 severe,\xa0 postponement\xa0 of surgery\xa0 for\xa0 several\xa0 days\xa0 makes\xa0 thorough\xa0 examination and\xa0 surgical\xa0 treatment\xa0 reliable\xa0 and\xa0 much\xa0 easier\xa0 tasks. Therefore,\xa0 postponement\xa0 of\xa0 the\xa0 decision\xa0 to\xa0 operate until\xa0 facial\xa0 edema\xa0 resolves\xa0 is\xa0 recommended\xa0 when\xa0 the necessity for intervention is questionable. This approach may\xa0 be\xa0 used\xa0 in\xa0 fractures\xa0 that\xa0 are\xa0 minimally\xa0 displaced, when\xa0 radiographic\xa0 examination\xa0 of\xa0 the\xa0 internal\xa0 orbit shows\xa0 no\xa0 major\xa0 defects.\xa0 However,\xa0 if\xa0 the\xa0 radiographic findings\xa0 are\xa0 so\xa0 dramatic\xa0 that\xa0 intervention\xa0 is\xa0 definitely necessary, it may be advantageous to perform the surgery\xa0regardless of the facial edema present, because the final soft\xa0 tissue\xa0 contour\xa0 may\xa0 be\xa0 superior\xa0 to\xa0 that\xa0 which\xa0 may occur when surgery is postponed. If the surgeon decides not to intervene, the patient should be observed for 2 to 3 weeks and a soft diet should be prescribed.\nOne should always remember that if a force is sufficient to produce a fracture of the zygoma, it is also sufficient\xa0 to\xa0 produce\xa0 intracranial\xa0 injuries.\xa0 ZMC\xa0 fractures are not life-threatening injuries and should not be given\xa0priority over more acute problems. Treatment need not be hastened if the neurologic state of the patient is in\xa0question\xa0 because\xa0 zygomatic\xa0 fractures\xa0 can\xa0 be\xa0 satisfactorily\xa0 treated\xa0 in\xa0 several\xa0 days,\xa0 after\xa0 the\xa0 facial\xa0 edema\xa0 has resolved.\nRef: Fonseca 4th ed page no 363', 'role': 'assistant'}]