Application Of Orbital Volume Change In The Evaluation Of Curative Effect Reconstruction Of Ethmoid Vertical Plate Orbital Wall Fracture

Objective: To evaluate the surgical efficacy of ethmoid vertical plate orbital wall reconstruction under nasal endoscope by measuring the orbital volume with computed tomography(CT)and orbital volume calculation(OV).Methods: From Feb.2018 to Jan.2022,22 ocular trauma patients in our hospital were selected for orbital wall injury repair with autologous ethmoid vertical plate.The orbital volume before was compared to the volume 6 months after the operation by self comparative analysis to analyze the surgical efficacy.Results: After surgery,the symptoms of diplopia and ocular movement limitation in22 patients improved or returned to normal;the exophthalmos of the affected eye(17.0± 0.26)mm was significantly higher than that of the affected eye(14.40 ± 0.56)mm at 6months after operation(t=26.37,P<0.001);the volume of the affected eye before operation(33.98±0.93)ml was significantly higher than that of the healthy eye(29.95±0.36)ml(t=19.91,P<0.001);the volume of the affected eye(30.21±0.76)ml at6 months after operation was significantly lower than that of the affected eye(33.98±0.93)ml before operation(t=-19.91,P<0.001);the volume of the affected eye(30.21±0.76)ml after operation was not significantly different from that of the healthy eye(29.96 ± 0.36)ml(t=1.28,P=0.213),which indicated that the volume of the affected orbit had basically recovered to the level of the healthy side.Conclusion: Using imaging technology and related software to measure the orbital volume of patients undergoing reconstruction of the orbital wall fracture with the vertical plate of the ethmoid bone has the advantages of non-invasive and convenient.It objectively shows the increase of orbital volume caused by the orbital tissue incarceration before operation and the decrease of orbital volume after the operation of reducing the contents of the eye.At the same time,it "quantitatively" shows the change of the eyes from obvious difference to restoration of symmetry,which has certain reference significance for the evaluation of the surgical effect.