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Keratokonusta Uygulanan Kornea Kollajen Çapraz Bağ Tedavisi Sonuçlarımız

Year 2018, Volume: 51 Issue: 3, 169 - 173, 26.12.2018

Abstract

AMAÇ: Kliniğimizde keratokonus (KK) tanılı hastalarda
uygulanan kornea kollajen çapraz bağ (KÇB) tedavisinin sonuçlarının
değerlendirilmesi.

HASTALAR VE YÖNTEM: Mayıs ve Ekim 2012 tarihleri
arasında KK tanısı ile KÇB tedavisi uygulanmış 23 hastanın 30 gözü geriye dönük
olarak incelendi. Tedavi öncesi ve tedavi sonrası 1, 3 ve 6. aylardaki
düzeltilmemiş ve en iyi düzeltilmiş görme keskinlikleri, Pentacam ile elde
edilen kornea topografileri, speküler mikroskopi ile elde edilen kornea endotel hücre sayıları incelendi.

BULGULAR: On
ikisi erkek, 11’i kadın hastanın yaşlarının ortanca değeri 18 (12-31) yıl idi.
Düzeltilmemiş görme keskinliklerinde takiplerde işlem öncesine göre özellikle
3. ve 6. ayda artış olmasına rağmen fark anlamlı bulunmadı (P =
0.738). Düzeltilmiş
görme keskinliğinde 1. ayda düşüş
görülmesine
rağmen 3. ve 6. aydaki değerler işlem öncesi ile aynı düzeyde saptandı (P =
0.528). Kornea
dansitometre değerlerinde işlem öncesine kıyasla 1, 3 ve 6. aylarda anlamlı
artış görüldü (sırasıyla P <0.001, <0.001 ve 0.028).
İşlem sonrası 1. ayda en
ince kornea kalınlığı değerlerinde anlamlı düşüş
(P <0.001)  ve bu düşüşü takiben 3. ve 6. aylarda
başlangıç değerlerine yakın artış görüldü. Endotel hücre sayımlarında işlem
öncesi ve takipler arasında anlamlı fark bulunmadı (P =0.119). K1, K2, Kmax ve Kapex
değerlerinde 1. ayda hafif bir artış görülse de 3. ve 6. ay değerlerinde düşüş
görüldü. Ancak bu düşüş işlem öncesi değerlere göre anlamlı bulunmadı
(sırasıyla P =0.809, 0.408, 0.131, 0.624). Kornea asferisite değeri (Q değeri) açısından
işlem öncesi ve takip değerleri arasında anlamlı fark görülmedi (P =0.597).
Tedavi uygulanan hiçbir olguda komplikasyon gelişmedi ve keratokonus ilerleme
bulgusuna rastlanmadı.







SONUÇ: Çalışmamızda elde edilen bulgular genel olarak
literatürdeki diğer çalışmalarla paralellik göstermektedir. KÇB tedavisi KK
ilerlemesinin durdurulmasında ucuz ve etkili bir yöntemdir. Olgu sayısı ve
takip süresi kısıtlı olsa da bu çalışma kliniğimizde uygulanan KÇB tedavisinin
etkin, güvenli ve literatür ile uyumlu olduğunu bildiren ilk çalışma olması
açısından önem arz etmektedir. 

References

  • Referans1: Espandar L, Meyer J. Keratoconus: overview and update on treatment. Middle East Afr J Ophthalmol. 2010;17:15-20.
  • Referans2: Or H. An Up-To-Date View at the Etiopathogenesis of Keratoconus. Turk J Ophthalmol. 2011;41:339-47.
  • Referans3: Spoerl E, Wollensak G, Seiler T. Increased resistance of crosslinked cornea against enzymatic digestion. Curr Eye Res. 2004;29:35-40.
  • Referans4: Wollensak G, Spoerl E, Seiler T. Riboflavin/ultraviolet-a-induced collagen crosslinking for the treatment of keratoconus. Am J Ophthalmol. 2003;135:620-627.
  • Referans5: Caporossi A, Baiocchi S, Mazzotta C, Traversi C, Caporossi T. Parasurgical therapy for keratoconus by riboflavin-ultraviolet type A rays induced cross-linking of corneal collagen: preliminary refractive results in an Italian study. J Cataract Refract Surg. 2006;32:837-845.
  • Referans6: Raiskup-Wolf F, Hoyer A, Spoerl E, Pillunat LE. Collagen crosslinking with riboflavin and ultraviolet-A light in keratoconus: long-term results. J Cataract Refract Surg. 2008;34:796-801.
  • Referans7: Wittig-Silva C, Whiting M, Lamoureux E, Lindsay RG, Sullivan LJ, Snibson GR. A randomized controlled trial of corneal collagen cross-linking in progressive keratoconus: preliminary results. J Refract Surg. 2008;24:720-725.
  • Referans8: Vinciguerra P, Albè E, Trazza S, et al. Refractive, topographic, tomographic, and aberrometric analysis of keratoconic eyes undergoing corneal cross-linking. Ophthalmology. 2009;116:369-378.
  • Referans9: Coskunseven E, Jankov MR 2nd, Hafezi F. Contralateral eye study of corneal collagen cross-linking with riboflavin and UVA irradiation in patients with keratoconus. J Refract Surg. 2009;25:371-376.
  • Referans10: Arbelaez MC, Sekito MB, Vidal C, Choudhury SR. Collagen cross-linking with riboflavin and ultraviolet-A light in keratoconus: One-year results. Oman J Ophthalmol. 2009;2:33-38.
  • Referans11: Hersh PS, Greenstein SA, Fry KL. Corneal collagen crosslinking for keratoconus and corneal ectasia: One-year results. J Cataract Refract Surg. 2011;37:149-160.
  • Referans12: Gumus K, Mirza E, Erkilic K, et al. Preliminary Results of Cross-Linking with Riboflavin/UV-A in Patients with Progressive Keratoconus. Turk J Ophthalmol 2010;40:18-24.
  • Referans13: Wollensak G, Iomdina E, Dittert DD, Herbst H. Wound healing in the rabbit cornea after corneal collagen cross-linking with riboflavin and UVA. Cornea. 2007;26:600-605.
  • Referans14: Mazzotta C, Balestrazzi A, Traversi C, et al. Treatment of progressive keratoconus by riboflavin-UVA-induced cross-linking of corneal collagen: ultrastructural analysis by Heidelberg Retinal Tomograph II in vivo confocal microscopy in humans. Cornea. 2007;26:390-397.

Outcomes of Cornea Collagen Cross-Linking in the Management of Keratoconus

Year 2018, Volume: 51 Issue: 3, 169 - 173, 26.12.2018

Abstract

ABSTRACT

PURPOSE: To evaluate the results of cornea collagen
cross-linking (CXL) in the management of keratoconus (KC).

PATIENTS AND METHODS: The data
of 30 eyes of 23 patients who underwent CXL for the management of KC between
May and October 2012 were reviewed retrospectively. Preoperative and
postoperative first, third and sixth month uncorrected and best corrected
visual acuities, corneal topographies by Pentacam, and corneal endothelial cell
counts by specular microscopy were evaluated.

 RESULTS:
The median age of 12 male and 11 female patients was 18 (12-31).
Uncorrected visual acuity was increased at 3 and 6 months of follow-up but the
difference was not statistically significant (P =0.738). The best corrected
visual acuity was decreased one month after the procedure and increased to the
preoperative values at 3 and 6 months of follow up (P =0.528). Corneal
densitometry value was increased significantly at 1, 3 and 6 months of follow
up compared to the preoperative value (P <0.001, <0.001 and 0.028
respectively). The median corneal thickness at the thinnest location was
decreased significantly at 1 month postoperatively (P <0.001) and then increased
to the levels that was very close to the preoperative values. No significant
difference was found in corneal endothelial cell count between preoperative and
postoperative values (P =0.119). K1, K2, Kmax and Kapex values were increased
slightly one month after CXL and then gradually decreased at 3 months and 6
months postoperatively but these differences did not reach statistical
significance (P =
0.809,
0.408, 0.131, and 0.624
, respectively). No significant change was found in
corneal asphericity value
(Q
value, P =0.597).
No complication and no signs of progression in KC were
detected in any of the eyes.

CONCLUSIONS: Our results are compatible with the studies in the
literature. CXL is a cheap and safe method to halt the progression of KC.
Although the number of cases and follow up time are limited, this study is
valuable to show our clinical CXL application is safe, effective and compatible
with previous reports.

References

  • Referans1: Espandar L, Meyer J. Keratoconus: overview and update on treatment. Middle East Afr J Ophthalmol. 2010;17:15-20.
  • Referans2: Or H. An Up-To-Date View at the Etiopathogenesis of Keratoconus. Turk J Ophthalmol. 2011;41:339-47.
  • Referans3: Spoerl E, Wollensak G, Seiler T. Increased resistance of crosslinked cornea against enzymatic digestion. Curr Eye Res. 2004;29:35-40.
  • Referans4: Wollensak G, Spoerl E, Seiler T. Riboflavin/ultraviolet-a-induced collagen crosslinking for the treatment of keratoconus. Am J Ophthalmol. 2003;135:620-627.
  • Referans5: Caporossi A, Baiocchi S, Mazzotta C, Traversi C, Caporossi T. Parasurgical therapy for keratoconus by riboflavin-ultraviolet type A rays induced cross-linking of corneal collagen: preliminary refractive results in an Italian study. J Cataract Refract Surg. 2006;32:837-845.
  • Referans6: Raiskup-Wolf F, Hoyer A, Spoerl E, Pillunat LE. Collagen crosslinking with riboflavin and ultraviolet-A light in keratoconus: long-term results. J Cataract Refract Surg. 2008;34:796-801.
  • Referans7: Wittig-Silva C, Whiting M, Lamoureux E, Lindsay RG, Sullivan LJ, Snibson GR. A randomized controlled trial of corneal collagen cross-linking in progressive keratoconus: preliminary results. J Refract Surg. 2008;24:720-725.
  • Referans8: Vinciguerra P, Albè E, Trazza S, et al. Refractive, topographic, tomographic, and aberrometric analysis of keratoconic eyes undergoing corneal cross-linking. Ophthalmology. 2009;116:369-378.
  • Referans9: Coskunseven E, Jankov MR 2nd, Hafezi F. Contralateral eye study of corneal collagen cross-linking with riboflavin and UVA irradiation in patients with keratoconus. J Refract Surg. 2009;25:371-376.
  • Referans10: Arbelaez MC, Sekito MB, Vidal C, Choudhury SR. Collagen cross-linking with riboflavin and ultraviolet-A light in keratoconus: One-year results. Oman J Ophthalmol. 2009;2:33-38.
  • Referans11: Hersh PS, Greenstein SA, Fry KL. Corneal collagen crosslinking for keratoconus and corneal ectasia: One-year results. J Cataract Refract Surg. 2011;37:149-160.
  • Referans12: Gumus K, Mirza E, Erkilic K, et al. Preliminary Results of Cross-Linking with Riboflavin/UV-A in Patients with Progressive Keratoconus. Turk J Ophthalmol 2010;40:18-24.
  • Referans13: Wollensak G, Iomdina E, Dittert DD, Herbst H. Wound healing in the rabbit cornea after corneal collagen cross-linking with riboflavin and UVA. Cornea. 2007;26:600-605.
  • Referans14: Mazzotta C, Balestrazzi A, Traversi C, et al. Treatment of progressive keratoconus by riboflavin-UVA-induced cross-linking of corneal collagen: ultrastructural analysis by Heidelberg Retinal Tomograph II in vivo confocal microscopy in humans. Cornea. 2007;26:390-397.
There are 14 citations in total.

Details

Primary Language English
Subjects Health Care Administration
Journal Section Original research article
Authors

Mehmet Yakın

Ayşe Burcu This is me

Züleyha Yalnız Akkaya This is me

Hatice Elvin Yıldız This is me

Firdevs Örnek This is me

Publication Date December 26, 2018
Submission Date May 10, 2018
Published in Issue Year 2018 Volume: 51 Issue: 3

Cite

AMA Yakın M, Burcu A, Yalnız Akkaya Z, Yıldız HE, Örnek F. Outcomes of Cornea Collagen Cross-Linking in the Management of Keratoconus. Ankara Eğitim ve Araştırma Hastanesi Tıp Dergisi. December 2018;51(3):169-173.