Morphofunctional analysis of vitreous opacities before and after YAG-laser vitreolysis

Author(s):  
Y.Y. Khzardzhan ◽  
◽  
V.P. Fokin ◽  
S.V. Balalin ◽  
A.S. Balalin ◽  
...  
Author(s):  
Y.Y. Khzardzhan ◽  
◽  
V.P. Fokin ◽  
A.S. Balalin ◽  
S.V. Balalin ◽  
...  

Introduction. Vitreous opacities are quite common, occurring in 76% of cases and significantly reducing quality of life in 33% of them. YAG-laser vitreolysis is considered as an alternative treatment option for patients with floating vitreous opacities. Purpose. To develop an optimized YAG-laser vitreolysis technology based on the assessment of the acoustic density of the vitreous opacities. Material and methods. The results of YAG-laser vitreolysis of vitreous opacities in 318 patients (318 eyes) were analyzed. A photo-optical method has been developed for visualizing opacities of the vitreous body, registering the area of opacities and the dimming intensity index. A method has been developed for the personalized selection of laser energy taking into account the acoustic density of the vitreous opacities. Results. After performing multi-stage laser treatment, a significant decrease in the area of opacities and the dimming intensity index, an increase in the threshold of retinal photosensitivity according to microperimetry data and a decrease in the acoustic density of opacities were noted. Conclusions. Application of optimized YAG-laser vitreolysis technology for vitreous opacities allows to achieve the best values of clinical and functional parameters (p<0.05). Key words: vitreous body opacities, photo-optical method, efficiency of YAG-laser vitreolysis


Revista CEFAC ◽  
2017 ◽  
Vol 19 (5) ◽  
pp. 712-725
Author(s):  
Rodrigo Alves de Andrade ◽  
Maria Deluana da Cunha ◽  
Ana Maria da Costa dos Santos Reis

ABSTRACT This study aimed at characterizing the speech and chewing of users of conventional complete dentures (CCD) before and after speech therapy and prosthetic functional adaptation. The participants consisted of 10 users, divided into two groups: experimental (G1) and control (G2). Both groups underwent the same speech therapy and chewing evaluation before and 15 days after prosthetic functional adaptation; G1 underwent speech therapy in the period before prosthetic functional adaptation, and G2 underwent prosthetic functional adaptation without speech-language intervention. As observed, G1 presented 60% of participants with phonetic and/or articular distortions and inadequate cut of the food and 80% with unilateral chewing; after therapy, no speech and masticatory alterations were observed, but the altered cut was seen in 100% of the group. In G2, 80% of the participants had speech and chewing alterations and 40% had an inadequate cut. After the therapy period, 60% of the subjects remained with speech alterations and 100% with altered cut and chewing alterations. It can be concluded that after prosthetic functional adaptation, the group that underwent speech therapy did not present the alterations initially detected, except for the cut of the food, as opposed to G2 in which the changes persisted, showing that prosthetic rehabilitation alone, did not reestablish functional patterns, speech-language intervention being required.


2004 ◽  
Vol 471-472 ◽  
pp. 644-648
Author(s):  
Dun Wen Zuo ◽  
Wen Zhuang Lu ◽  
Xiang Feng Li ◽  
X.Q. Chu ◽  
Min Wang

Few research works have been reported on hole making in EACVD thick diamond film, though many papers have been published on the preparation and smoothing of the film. In this paper, YAG laser and EDM were used to make holes in un-doped and Boron-doped diamond film respectively. Fundamental investigation was carried out on the effects of processing parameters on the holing efficiency and processed surface quality. The film surface was analyzed by means of Raman spectrum before and after holing. It is shown that YAG laser has a higher processing efficiency than EDM, but the latter can get a rounder hole.


2019 ◽  
Vol 15 (4) ◽  
pp. 411-415
Author(s):  
B. M. Aznabaev ◽  
T. R. Mukhamadeev ◽  
A. A. Aleksandrov ◽  
T. I. Dibaev ◽  
A. S. Vafiev ◽  
...  

Purpose: to evaluate the efficiency of vitreous floaters removal using the Nd: YAG-laser DIXION LPULSA SYL-9000 with a coaxial light splitter. Patients and Methods. The study involved 24 patients (24 eyes) with Weiss ring-type floating vitreous opacities. All patients underwent laser vitreolysis on a Nd: YAG-laser DIXION LPULSA SYL-9000 with a coaxial light splitter. Laser procedures were performed at OPTIMED Laser Recovery Center. The age of the patients was from 47 to 81 years (average 58.3 ± 8.9 years). Among the patients 15 (62.5 %) were women and 9 (37.5 %) — men. Before procedure, a complete ophthalmological examination including registration of best corrected visual acuity (BCVA), autorefractometry, pneumotonometry, biomicroscopy, fundus examination, ultrasonic biometry, ultrasound B-scan was performed. Statistical processing was performed using Statistica v.10.0.0 (StatSoft®, Inc.) and Excel (Microsoft Office Professional 2016) software. The patients were observed for three months before the procedure. Follow-up examination was performed one day after the procedure. Results. After laser vitreolysis procedure all patients had a subjective vision quality improvement. In 18 (75 %) patients, floating “flies” completely disappeared. The remaining patients noted the disappearance of a large floating spot. Conclusion. The laser vitreolysis on the Nd: YAG-laser with a coaxial light splitter allows to improve the quality and visual acuity in patients with vitreous floater. The obtained results demonstrated that Nd: YAG-laser DIXION LPULSA SYL-9000 is effective and could be recommended for treatment of symptomatic vitreous floaters.


2014 ◽  
Vol 21 (01) ◽  
pp. 167-172
Author(s):  
Lal Muhammad Khattak ◽  
Afzal Qadir ◽  
Umer Khan ◽  
Muhammad Kashif Kamran

Objective: To study the complications of ND: YAG laser capsulotomy. Design:Clinical trial. Setting: Department of Ophthalmology KHYBER Medical University Institute ofMedical Sciences Teaching Hospital Kohat Development Authority (KDA) Kohat. Period: Jan2007 to June 2008. Material and methods: A total number of 250 patients with posterior capsularopacification were studied and look for complications after ND: YAG Laser application. Onehundred and thirty five (54% )were male and one hundred fifteen( 46%) patients were female.63% of patients had right eye involvement while 37% had left eye were involved. Patients werethoroughly examined before and after the procedure. All patients were followed for minimum sixmonths after the procedure. Data was analyzed by SPSS version 16. Chi square test wascalculated for the significance of analysis. Results: After Nd YAG laser capsulotomy there wassignificant improvement in visual acuity of my patients. There was transient rise of IOP in 25 (10%)of patients. Mild anterior uveitis in 20 (8.0%) of patients. Intra-ocular Lens pitting or cracks in 30(12%) of cases. Macular edema in 20 (8.0%) of cases. Retinal detachment in 5 (2.0%) of cases.Conclusions: Nd YAG laser is safe, effective and non-invasive procedure outdoor procedure bywhich we can get better visual outcome. Which had also some serious complication for that wehave to avoid and educate the patient about the complications of procedure.


QJM ◽  
2020 ◽  
Vol 113 (Supplement_1) ◽  
Author(s):  
B Abdala ◽  
K Magdy ◽  
M M M E Oreiby

Abstract Introduction Cataract is a consequence of the ageing of the lens and is the major priority in the global initiative to eliminate avoidable blindness by the year 2020. At present, the only means of treating cataract is by surgery, which initially restores high-quality vision and this is currently the most performed operation in developed countries. Aim of the Work to evaluate the influence of Nd:YAG laser capsulotomy on visual outcomes and macular thickness in patients with opacified posterior capsule. Patients and Methods This is a prospective comparative study done at the Nour Elein Hospital in Tanta. Thirty one pseudophakic eyes of patients (seven male, twenty four female), were included in the study with PCO following uncomplicated phacoemulsification with posterior chamber intraocular lens implantation. The age ranged from forty six years to sixty seven years old with a mean of (63.32±5.67) years. An informed consent was taken from each patient. All patients were treated by Nd: YAG laser capsulotomy between January 2017 till December 2017. The average time after cataract surgery was 18 months. Results Both groups had increased macular thickness at 1 week after Nd:YAG laser capsulotomy. The degree of macular thickening was similar in group 1 and group 2. Mean macular thickness was decreased to preoperative levels at 4 weeks after Nd:YAG laser capsulotomy in both groups volume. Conclusion Nd: YAG laser capsulotomy is the standard treatment for PCO and gives rise to rapid improvements in visual acuity, relieving the symptoms of blur, photophobia, and glare, and the size of capsulotomy opening does not affect the improvement in visual acuity, but it is better to avoid small sized capsulotomies to avoid post capsulotomy difractions.


2014 ◽  
Vol 63 (3) ◽  
pp. 21-25 ◽  
Author(s):  
Aleksandr Aleksandrovich Bezmenko ◽  
Andrey Aleksandrovich Shmidt ◽  
Anna Andreyevna Koval ◽  
Sergey Aleksandrovich Sibirev ◽  
Zhanna Mikhaylovna Karpishchenko ◽  
...  

The article presents the results of morphological evaluation of the vaginal tissues in women before and after treatment of stress incontinence with Er: YAG-laser (technologies IntimaLase and IncontiLase). Marked histological changes (increase of quantity and activity of fibroblasts, the increase of density of connective tissue, the emergence of neoangiogenesis plots) confirm the clinical efficacy of the method (the positive effect was obtained in 70,7 % of patients with I type of UI and 47 % with the II type of UI light and medium gravity).


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