Lee J W, Chiu H Y
Department of Surgery, National Cheng-Kung University Hospital, Tainan, Taiwan, R.O.C.
J Formos Med Assoc. 1993 Apr;92(4):349-55.
Measurement of orbital volume was conducted in 10 patients with blow-out fractures as well as in 20 controls. A bony orbital volume increase of up to 13.4+ +/- 6.0% was noted in the preoperative measurements. Proper reconstruction of the bony orbit in four patients reversed the volume change observed and achieved a satisfactory outcome. In the surgical techniques, we stress the importance of posterior floor restoration. Judicious analysis of the image and volume changes using computed tomography (CT) may offer great help in both pre- and postoperative assessments. An intimate correlation between the bony volume change and the observed degree of clinical enophthalmos has been confirmed. For a 1 mL increment in bony volume, there is a corresponding enophthalmos decrement of 1 mm on the Hertel exophthalmometer. In applying this information to clinical practice, we advocate that a bony volume change of over 8% (2 mL) usually implies a poor cosmetic outcome, thus indicating the need for surgical correction.
对10例爆裂性骨折患者和20例对照者进行了眼眶容积测量。术前测量发现骨眼眶容积增加高达13.4±6.0%。4例患者对骨眼眶进行了适当重建，逆转了观察到的容积变化并取得了满意的结果。在手术技术方面，我们强调后眶底修复的重要性。使用计算机断层扫描（CT）对图像和容积变化进行审慎分析，可能在术前和术后评估中都有很大帮助。已证实骨容积变化与观察到的临床眼球内陷程度密切相关。骨容积每增加1 mL，Hertel眼球突出计上相应的眼球内陷减少1 mm。在将这些信息应用于临床实践时，我们主张骨容积变化超过8%（2 mL）通常意味着美容效果不佳，因此表明需要手术矫正。
