Orbit size in CT in patients without primary indication for surgery vs dilopia and enophtalmos

Abstract

Background: Diplopia and enophthalmos is a common complication among patients with not surgical criteria. There is still debate regarding which is the best inclusion criteria for this surgery. Studies have shown that anywhere from 0.5 cc to 1 cc of increase in orbital volume will create approximately 1 mm of enophthalmos. Unfortunately, it was not easy for most clinicians to calculate orbital volumes, because software to automate this process was not readily available. Nowadays we actually have the software to calculate the orbital volumes. Objective: The aim of this studio is to compare the increase of the orbit volume with rates of diplopia and enophthalmos in patients which do not have actual inclusion criteria for surgery at the moment of the trauma, with long term objective of reviewing the actual inclusion criteria for surgery. Design: A prospective cohorts study. Non probabilistic sampling will be performed in order to obtain our patients. The study is planned to last 10 years; each patient will have a follow up of 6 months. All the patients included must have a CT scan at the moment of the trauma and end the follow up period. Setting: This cohorts study will take place in the Hospital Josep Trueta. Participants: Adult patients with an orbit pure fracture without inclusion criteria for surgery that arrive to the emergency room of the Hospital Josep Trueta. The patients will follow up the actual protocol of the hospital, with the difference that we will look the volume of the orbit at the CT at the moment of the trauma. While the follow up of these patients run as usual, we will look the ratio of diplopia and enophthalmos that appear as the increase of the orbit