Turkiye Klinikleri Journal of Medical Sciences

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Measurement of Eyelid and Orbital Fat Volume in Different Age Groups by Computed Tomography
Gözkapağı ve Orbita Yağ Hacminin Farklı Yaş Gruplarında Bilgisayarlı Tomografi ile Ölçülmesi
Yonca ÖZKAN ARATa, Christof KARMONIKb, Imtiaz A. CHAUDHRYc, Anıl ARATd, Serhat TOTANe, Eser YÜKSELe
Departments of aOphthalmology, dRadiology, eRadiology Department of Surgery, Division of Plastic Surgery, Baylor College of Medicine bDepartment of Radiology, The Methodist Hospital, Research Institute, Houston, TX cDepartment of Oculoplastic Surgery, King Khaled Eye Specialist Hospital, Riyadh, Kingdom of Saudi Arabia
Turkiye Klinikleri J Med Sci. 2010;30(3):
doi: 10.5336/medsci.2008-10056
Article Language: EN
Full Text
ABSTRACT
 Objective: To compare the eyelid and orbital fat volume in different age groups. Material and Methods: Sixty seven orbits of 39 subjects with normal orbital computed tomography (CT) scans with an age range of 18-82 years were included in the study. Three dimentional (3D) connected threshold region growing algorithm as a plugin to Image J, an image analysis software package developed by National Institute of Health (NIH) (U.S. Department of Health and Human Services, USA) was used to measure the orbital and eyelid fat volume on axial computed tomography sections. Measurements were compared in three different age groups. Results: There were 16 orbits in the first group (18-34 years), 33 in the second (35-60 years) and 18 in the third group (61 and up). Total volume (Orbit + eyelid) and total fat volume (Orbital+ eyelid) was noted to increase with age (p= 0.0021). Eyelid fat volume also increased with age (p=0.0013). Total fat volume/Total volume (p= 0.0041) and Eyelid fat volume/Total volume (p= 0.0033) was noted to increase with age. Eyelid fat volume/Total fat volume also increased with age (p= 0.0042). Orbital fat volume showed a trend of increase with age but this was not found to be statistically significant. (p= 0.072) The proportion of mean orbital fat volume within mean total volume (p= 0.688) did not show any change with age. Conclusion: The total fat volume and eyelid fat volume as well as their percentage of the total volume increased with age. Percentage of eyelid fat volume of the total fat volume increased with age as well. These observations suggest that orbital fat expansion may occur with aging and fat excision may have a role in blepharoplasty for treatment of upper and lower eyelid prominence. This technique may be useful in further future studies regarding the anatomy and distribution of eyelid and orbital fat.

Keywords: Eyelids; orbit; adipose tissue; aging
ÖZET
 Amaç: Bu araştırmada farklı yaş gruplarında göz kapağı ve orbita yağ hacminin karşılaştırılması amaçlanmıştır. Gereç ve Yöntemler: Onsekiz ile 82 yaşları arasındaki 39 kişinin 67 normal orbita bilgisayarlı tomografisi (BT) araştırmaya dahil edilmiştir. Gözkapağı ve orbita yağ hacmi, Ulusal Sağlık Enstitüsü (NIH) (A.B.D. Sağlık Bakanlığı bünyesinde) tarafından geliştirilmiş bir görüntü analizi programı olan Imaj J ile birlikte üç boyutlu büyüyen bağlantılı eşik bölge algoritması kullanılarak aksiyel BT kesitlerinde ölçülmüştür. Bulunan ölçümler üç ayrı yaş grubunda karşılaştırılmıştır. Bulgular: Birinci grupta (18-34 yaş) 16 orbita, ikinci grupta (35-60 yaş) 33 ve üçüncü grupta (61yaş ve üzeri) 18 orbita bulunmaktaydı. Total hacim (Orbita + göz kapağı) ve total yağ hacminin (Orbita + göz kapağı) yaş ile beraber arttığı görülmüştür (p= 0.0021). Gözkapağı yağ hacminin de yaş ile beraber arttığı izlenmiştir (p= 0.0013). Total yağ hacmi/Total hacim (p= 0.0041), Gözkapağı yağ hacmi /Total hacim (p= 0.0033) ve Gözkapağı yağ hacmi/Total yağ hacmi (p= 0.0042) oranlarının da yaş ile beraber arttığı gözlenmiştir. Orbita yağ volümü yaşla beraber bir artış göstermiş fakat istatistiksel olarak anlamlı bulunmamıştır. (p= 0.072) Orbita yağ hacmi/Total hacim (p= 0.688) oranının yaş ile beraber değişmediği izlenmiştir. Sonuç: Total yağ hacmi ve göz kapağı yağ hacmi ile bunların total hacime oranlarının yaşla beraber arttığı gözlenmiştir. Gözkapağı yağ hacminin de total yağ hacmine oranının yaşla arttığı görülmüştür. Bu bulgular yaşla beraber orbita yağ dokusunun genişleme gösterebilecegini ve üst/alt kapak blefaroplastisinde yağ dokusu çıkartılmasının rolünü desteklemektedir. Bu yöntem, gelecekteki orbitanın anatomisi ve orbita ve göz kapağı yağ dokusunun dağılımı ile ilgili çalışmalarda kullanılabilecek faydalı bir tekniktir.

Anahtar Kelimeler: Gözkapağı; orbita; yağ dokusu; yaşlanma

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