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Results of Nd: Yag Laser Posterior Capsulotomy

نتائج بضع المحفظة الخلفية بالنيوديميوم ياغ ليزر

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 Publication date 2013
  fields Medicine
and research's language is العربية
 Created by Shamra Editor




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The research has been done in Alassad University Hospital in Lattakia, from January 2009 to January 2011 and included 80 pseudophakic eyes of 80 patients ] 36 (45.0%) belonged to male sex and 44 (55.0%) females[ older than 15 years having PCO with decreased best corrected Visual Acuity (VA) of two or more Snellen’s chart line. Before laser treatment, the VA was assessed and all patients were examined on slit lamp for IOP and to rule out the causes for reduced vision other than PCO. Then 2-3 mm size capsulotomy was done with Q-switched Nd: YAG Laser, with Abraham’s posterior capsulotomy lens, after topical anesthesia, by using minimum amount of energy and fewest numbers of pulses. Patients were followed for assessment of best corrected VA and for possible complications just after laser and at the end of 1st week, 2nd week and the 4th week. The post-laser treatment was advised in accordance with complications to each patient. The types of PCO were fibrosis in 54 (67.5%) eyes, Elschnig pearls in 16 (20 %) eyes and wrinkling in 10 (12.5%) eyes. Pre-laser visual acuity was CF-6/60 in 42 (52.5%) eyes, 6/36-6/24 in 23 (28.75%) eyes and 6/18-6/12 in 15 (18.75%) eyes. Post-laser VA was improved to 6/9-6/6 in 60 (75%) eyes. Out of 80 patients, 10 (12.5%) eyes developed the complications due to YAG laser which included IOL pitting in 4 (5%) eyes, raised IOP in 1 (1.25%), uveitis in 2 (2.5%), iris bleeding (hyphema) in 1 (1.25%), vitreous in anterior chamber in 1 (1.25%), and cystoids macular edema (CME) in 01(1.25%) eye. None of the eye developed sight threatening complications like retinal detachment or macular hole. The 20 (25%) eyes did not achieve the significant improvement because of pre-existing pathology in the posterior segment that was not diagnosed at the time of screening due to thick PCO. This means that Nd: YAG laser capsulotomy is effective and convenient method for doing capsulotomy in all types of PCO. It is free from the risk of endophthalmitis found in surgical capsulotomy.


Artificial intelligence review:
Research summary
أجرى الدكتور قحطان جلول دراسة في مشفى الأسد الجامعي في اللاذقية بين يناير 2009 ويناير 2011 على 80 عينًا من 80 مريضًا يعانون من تعتيم المحفظة الخلفية (PCO) بعد جراحة الساد. تضمنت الدراسة تقييم القدرة البصرية قبل وبعد إجراء بضع المحفظة الخلفية باستخدام ليزر Nd:YAG. تم استخدام أقل طاقة ممكنة وأقل عدد من الضربات لتحقيق الفتحة المطلوبة في المحفظة الخلفية. أظهرت النتائج تحسنًا ملحوظًا في القدرة البصرية في 75% من الحالات، بينما لم يتحقق تحسن في 25% من الحالات بسبب وجود أمراض أخرى في الجزء الخلفي من العين لم يتم اكتشافها قبل الجراحة. تضمنت الاختلاطات الناتجة عن استخدام الليزر ارتفاع ضغط العين، التهاب العنبة، نزف القزحية، وذمة اللطخة الكيسية، ولكن لم تُسجل أي اختلاطات خطيرة مثل انفصال الشبكية أو تقب اللطخة. خلصت الدراسة إلى أن بضع المحفظة الخلفية بالليزر Nd:YAG هو إجراء فعال وآمن لتحسين القدرة البصرية في حالات تعتيم المحفظة الخلفية.
Critical review
دراسة نقدية: تعتبر هذه الدراسة مهمة لأنها تسلط الضوء على فعالية وأمان استخدام ليزر Nd:YAG في علاج تعتيم المحفظة الخلفية بعد جراحة الساد. ومع ذلك، يمكن الإشارة إلى بعض النقاط التي قد تحتاج إلى مزيد من التوضيح أو التحسين. أولاً، لم يتم توضيح تفاصيل حول معايير اختيار المرضى بشكل كافٍ، مما قد يؤثر على تعميم النتائج. ثانيًا، كان من الممكن أن تكون الدراسة أكثر شمولية إذا تضمنت مجموعة مقارنة مع تقنيات علاجية أخرى. ثالثًا، لم يتم التطرق بشكل كافٍ إلى الآثار الجانبية طويلة الأمد لاستخدام الليزر، مما قد يكون مهمًا لتقييم الأمان على المدى الطويل. وأخيرًا، كان من الممكن تحسين الدراسة بإجراء متابعة أطول للمرضى لتقييم استدامة التحسن في القدرة البصرية.
Questions related to the research
  1. ما هي الفترة الزمنية التي أجريت فيها الدراسة؟

    أجريت الدراسة بين يناير 2009 ويناير 2011.

  2. ما هو الهدف الرئيسي من الدراسة؟

    الهدف الرئيسي هو تقييم فعالية وأمان استخدام ليزر Nd:YAG في تحسين القدرة البصرية بعد بضع المحفظة الخلفية في حالات تعتيم المحفظة الخلفية.

  3. ما هي نسبة التحسن في القدرة البصرية بعد استخدام الليزر؟

    تحسنت القدرة البصرية في 75% من الحالات بعد استخدام الليزر.

  4. ما هي الاختلاطات التي تم تسجيلها بعد استخدام الليزر؟

    تضمنت الاختلاطات ارتفاع ضغط العين، التهاب العنبة، نزف القزحية، وذمة اللطخة الكيسية، ولكن لم تُسجل أي اختلاطات خطيرة مثل انفصال الشبكية أو تقب اللطخة.


References used
Hollick EJ, Spalton DJ, Ursell PG, Pande MV. Lens epithelial cell regression on the posterior capsule with different intraocular lens materials. Br J Ophthalmol. 1998; 82:1182-88
Kappelhof JP, Vrensen GFJM. The pathology of after cataract. A mini review. Acta Ophthalmol. 1992; Suppl 205:13–24
Sundelin K, Sjostrand J. Posterior capsule opacification5 years after extracapsular cataract extraction. J Catarct Refract Surg. 1999; 25:246-50
Paulsson LE, Sjostrand J. Contrast sensitivity in the presence of a glare light. Theoretical concepts and preliminary clinical studies. Invest Ophthalmol Vis Sci. 1980; 19:401-6
Tan JCH, Spalton DJ, Arden GB. Comparison of methods to assess visual impairment from glare and light scattering with posterior capsule opacification. J Cataract Refract Surg. 1998; 24:1626-31
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