Journals / Glokom Katarakt / 2007 / Cilt: 2 - Sayı: 1

Early postoperative changes in refractive parameters after trabeculectomy

Trabekülektomi sonrası erken dönem refraktif parametrelerdeki değişiklikler

Pages
43–46
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

While the ACD and AL reduction were related to the amount of IOP reduction, the determinant parameter for the surgically induced astigmatism type was the “scleral flap area”.

📌 3 Key Takeaways

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Objective & Hypothesis:Purpose: To study the changes occuring in refractive parameters in early postoperative period following trabeculectomy and to identify preoperatrive and peroperative parameters that effect these changes.
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Key Findings & Data:Materials and Methods: 26 eyes of 24 patients who underwent trabeculectomy surgery included into this prospective study.
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Conclusion & Impact:While the ACD and AL reduction were related to the amount of IOP reduction, the determinant parameter for the surgically induced astigmatism type was the “scleral flap area”.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Trabekülektomi · Astigmatizm · Göz içi basınç

Abstract

Purpose: To study the changes occuring in refractive parameters in early postoperative period following trabeculectomy and to identify preoperatrive and peroperative parameters that effect these changes. Materials and Methods: 26 eyes of 24 patients who underwent trabeculectomy surgery included into this prospective study. Refractive parameters measurements performed with autorefractoceratometry (horizontal and vertical power and axis), corneal topography (anterior chamber depth- ACD and corneal thickness-CT) and biometry (axial length- AL) along with complete opthalmic examination performed in preoperative and postoperative 3rd month. Surgically induced astigmatism was calculated with vector analysis. Paired t test, correlation analysis, logistic regression analysis and χ2 test were used in the statistical analysis. Results: The mean preoperative intraocular pressure (IOP) was 24.13±8.80 mmHg while the mean ACD was 2.39±0.44 mm and mean AL was 22.93±1.20 mm; these values have been determined as 12.66±4.75 mmHg, 2.28±0.43 mm and 22.70±1.12 mm, respectively in postoperative period, and it has been seen that the difference between the averages are statistically significant (p=0.000, p=0.040, p=0.034). As a result of the vector analysis, 14 of eyes (53.8%) had with the rule astigmatism and 12 of eyes (46.2%) had against the rule astigmatism. Evaluation of the scleral flap area, number of sutures and internal ostium area, which are parameters that can affect these results, with the logistic regression analysis revealed that “scleral flap area” may have a statistically significant effect (p=0.026). Conclusion: In early postoperative period the ACD and AL were decreased and astigmatism was also changed. While the ACD and AL reduction were related to the amount of IOP reduction, the determinant parameter for the surgically induced astigmatism type was the “scleral flap area”.

Özet

Amaç: Trabekülektomi ameliyatı sonrası erken dönemde refraktif parametrelerde ortaya çıkan değişimleri incelemek ve bu değişimlere etkisi olan ameliyat öncesi ve ameliyat sırasında parametreleri tanımlamaktır. Gereç ve Yöntem: Bu çalışmada trabekülektomi uygulanan 24 olgunun 26 gözü prospektif olarak incelenmiştir. Çalışmaya alınan tüm olgulara ameliyat öncesi ve ameliyat sonrası 3. ayda tam oftalmik muayene ile birlikte, otorefraktokeratometri (yatay ve dikey eksen kırıcılıkları ve aksları), korneal topografi (ön kamara derinliği-ÖKD ve korneal kalınlık-KK) ve biometri (aksiyel uzunluk-AU) uygulanarak refraktif parametre ölçümleri yapılmıştır. Trabekülektomi cerrahisine bağlı astigmatizma vektör analizi ile hesaplanmıştır. İstatistiksel analizlerde eşli t testi, korelasyon analizi, logistik regresyon analizi ve χ2 testi kullanılmıştır. Bulgular: Çalışmaya alınan gözlerin ameliyat öncesi dönemde göz içi basınç (GİB) ortalamaları 24.13±8.80 mmHg, ÖKD ortalamaları 2.39±0.44mm ve AU ortalamaları 22.93±1.20 mm olarak ölçülmüş; ameliyat sonrası dönemde bu ortalamalar sırası ile 12.66±4.75 mmHg, 2.28±0.43 mm ve 22.70±1.12 mm olarak bulunmuş, ortalamalar arasındaki farkın istatistiksel olarak anlamlı olduğu görülmüştür (p=0.000, p=0.040, p=0.034). Yapılan vektör analizi sonucunda; gözlerden 14’ünde (%53.8) kurala uygun ve 12’sinde (%46.2) kurala aykırı astigmatizma geliştiği görülmüştür. Bu sonucu etkileyebilecek parametrelerden skleral flebin yeri, alanı, sütür sayısı ve internal ostiumun alanı logistik regresyon analizi ile değerlendirildiğinde; “skleral flebin alanı”nın astigmatizma türüne etkisi istatistiksel olarak anlamlı bulunmuştur (p=0.026). Sonuç: Trabekülektomi sonrası erken dönemde ÖKD ve AU azalmakta, astigmatizmada değişiklikler ortaya çıkmaktadır. ÖKD ve AU’nun azalması GİB’deki değişim miktarı ile ilişkili iken, cerrahiye bağlı astigmatizmanın tipinde belirleyici olan parametre “skleral flebin alanı”dır.

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Cite This Article

RODOPLU, S., ALİMGİL, M. L., GÜRLÜ, P. V. (2007). Early postoperative changes in refractive parameters after trabeculectomy. Glokom Katarakt, Cilt: 2 - Sayı: 1, 43–46. https://ajindex.com/articles/226657

References (14)

  1. Shields MB: Filtering Surgery, in: Allingham RR, Damji KF, Fre edman S, Moroi SE, Shafranov G, Shields MB (Eds.). The Shields' Textbook of Glaucoma, Philadelphia: Lippincott Williams and Williams, Wolters Kluwer Company 2005, p: 568-609.
  2. Rosen WJ, Mannis MJ, Brandt JD: The effect of trabeculectomy on corneal topography. Ophthalmic Surg. 1992;23:395-398.
  3. Claridge KG, Galbraith JK, Karmel V, et al.: The effect of trabecu­ lectomy on refraction, keratometry and corneal topography. Eye. 1995;9:292-298. Hugkulstone CE.: Changes in keratometry following trabeculec­tomy. Br J Ophthalmol. 1991;75:21 7-218.
  4. Dietze PJ, Oram O, Köhnen T, et al.: Visual function following trabeculectomy: Effect on corneal topography and contrast sensi­tivity. J Glaucoma.1997;6:99-103.
  5. Cunliffe IA, Dapling RB, West J, et al.: A prospective study exa­ mining the changes in factors that affect visual acuity following trabeculectomy. Eye. 1992;6:618-622.
  6. Egrilmez S, Ateş H, Nalcaci S, et al.: Surgically induced corneal refractive change following glaucoma surgery: Nonpenetrating trabecular surgeries versus trabeculectomy. J Cataract Refract Surg. 2004;30:l232-1239. Vernon SA, Zambarakji HJ, Potgieter F, et al.: Topographic and keratometric astigmatism up to 1 year following small flap trabeculectomy (microtrabeculectomy). Br J Ophthalmol. 1999;83:779-782.
  7. Zamowski T, Haszcz D, Rakowowska E, et al.: Corneal astigma­ tism after trabeculectomy. Klin Oczna. 1997,99:313-315.
  8. Goins K, Smith T, Kinker R, et al.: Axial anterior chamber depth after trabeculectomy. Ophthalmologica. 1990;200:l 77-180.
  9. Çakırer D, Ocakoğlu Ö, Tamçelik N: Trabekülektomi sonrası oküler biyometride ve refraksiyonda görülen değişiklikler. MN Oftalmol. 1996;3:224-226.
  10. Kao SF, Lichter PR, Musch DC: Anterior chamber depth following filtration surgery. Ophthalmic Surg. 1989,20:332-336.
  11. Karasheva G, Goebel W, Klink T, et al.: Changes in macular thickness and depth of anterior chamber in patients after filtrati­ on surgery. Graefe's Arch Clin ExpOphthalmol. 2003;241:170-175.
  12. Martinez-Bello C, Rodriquez-Ares T, Pazos B, et al.: Changes in anterior chamber depth and angle width after filtration surgery: a quantitative study using ultrasound biomicroscopy. J Glaucoma. 2000;9:51-55.
  13. Cashwell LF, Martin CA: Axial length decrease accompan­ ying successful glaucoma filtration surgery. Ophthalmology. 1999,106:2307-2311.
  14. Francis BA, Wang M, Lei H, Du LT, et al.: Changes in axial length following trabeculectomy and glaucoma drainage dev