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Pars plana vitrectomy

Gian Marco Tosi, Tommaso Bacci, Antonio Tarantello, Gianluca Martone, Claudio Traversi, Davide Marigliani, Gabriele Cevenini, Gianni Virgili
PURPOSE: To assess corneal subbasal nerve density (SBND) and corneal sensitivity (CS) after pars plana vitrectomy (PPV) for rhegmatogenous retinal detachment (RRD) without intraoperative 360-degree laser treatment using contact or noncontact panoramic viewing systems. METHODS: This is a prospective study of 34 eyes affected by RRD, which underwent PPV using contact (18 eyes) and noncontact (16 eyes) panoramic viewing systems; 12 eyes which underwent scleral buckling, and 17 eyes which underwent cataract surgery...
June 7, 2018: Cornea
Timur M Yildirim, Gerd U Auffarth, Grzegorz Łabuz, Silvia Bopp, Hyeck-Soo Son, Ramin Khoramnia
PURPOSE: Explanted hydrophilic intraocular lenses (IOLs) with clinically significant opacification after pars plana vitrectomy (PPV) were assessed for material change and optical quality, in an in-vitro laboratory study. DESIGN: Retrospective observational case series. METHODS: 10 opacified IOLs after PPV with intraocular gas injection were analyzed in a laboratory setting. Analyses included evaluation of patients' medical history, optical quality assessment, light microscopy, histological staining, scanning electron microscopy and energy dispersive X-Ray spectroscopy...
June 8, 2018: American Journal of Ophthalmology
Jianchun Yu, Xing Chen, Danying Zhou, Jian Shen, Yanbing Wu, Qingzhu Sun
BACKGROUND Currently, safe and effective surgical treatment of malignant glaucoma is still under investigation. This study evaluated the clinical efficacy of ciliary ring incision combined with modified partial pars plana vitrectomy in the treatment of malignant glaucoma. The technique is particularly useful in the treatment of "phakic" patients with malignant glaucoma, especially those who wish to preserve the natural lens. MATERIAL AND METHODS We retrospectively analyzed 13 cases (16 eyes) of malignant glaucoma in which patients underwent ciliary ring incision combined with modified partial pars plana vitrectomy based on follow-up data collected from May 2004 to March 2017...
June 10, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
Chu-Yu Yen, Gow-Lieng Tseng
RATIONALE: Neovascular glaucoma (NVG) is one of the most aggressive types of glaucoma in clinical practice. The outcomes are unsatisfactory despite the successful trabeculectomy with glaucoma shunt insertion. PATIENT CONCERNS: EX-PRESS Glaucoma Filtration Device (Alcon Laboratories, Fort Worth, TX), which is used in open-angle glaucoma surgery, could minimize the potential injury caused by traditional trabeculectomy. However, no study reported about the posterior segment insertion of this device...
June 2018: Medicine (Baltimore)
Amanda Rey, Ignasi Jürgens, Xavier Maseras, Agnieszka Dyrda, Patricia Pera, Antonio Morilla
Purpose: To evaluate the visual outcomes and complications of phacoemulsification in previously vitrectomized eyes. Patients and methods: A retrospective analysis of 87 consecutive vitrectomized eyes (87 patients) which had undergone phacoemulsification with intraocular lens implantation between 2013 and 2016. Results: The mean interval from pars plana vitrectomy (PPV) to cataract surgery (CS) was 18.8 months. Mean age at CS was 61.5 years...
2018: Clinical Ophthalmology
Zhongjing Lin, Yanwei Chen, Sha Gao, Yisheng Zhong, Xi Shen
BACKGROUND: To report a case series in which a modified technique was used to remove retained submacular perfluorocarbon liquid (PFCL) secondary to vitreoretinal surgery for rhegmatogenous retinal detachment. CASE PRESENTATION: Four patients who had undergone pars plana vitrectomy for rhegmatogenous retinal detachment were further treated with surgical intervention because of retained submacular PFCL. With a three-port pars plana approach, after the internal limiting membrane peeling with indocyanine green staining, a 38-gauge flexible cannula was used to aspirate the submacular perfluorocarbon bubble, followed by fluid-air exchange and air injection into vitreous cavity...
June 4, 2018: BMC Ophthalmology
Swathi Kaliki, Shikha Taneja, Vijay A R Palkonda
PURPOSE: To study the clinical presentation and treatment outcome of patients who underwent inadvertent intraocular surgery before the diagnosis of retinoblastoma. DESIGN: Retrospective study of 14 patients who had undergone an inadvertent intraocular surgery before the diagnosis of retinoblastoma. RESULTS: The mean age at presentation to the ocular oncology clinic was 69 months. The most common initial misdiagnosis was endophthalmitis (n = 4)...
May 8, 2018: Retina
Damien C M Yeo, Aaron Nagiel, Unikora Yang, Thomas C Lee, Sui Chien Wong
Endoscopic vitrectomy is a useful and unique adjunct to microincision vitreoretinal surgery. The optical properties of endoscopy allow for some clinically advantageous approaches that are not possible with regular microscope viewing systems, namely, the ability to both bypass optically signficant anterior segment opacities and directly visualize dificult-to-access retroirideal, retrolental, and anterior retinal structures in their natural anatomical configuration. The surgical benefits include improved surgical access to the pars plana, pars plicata, ciliary sulcus, ciliary body, and peripheral lens, along with unique access to anterior traction in complex pediatric anterior detachments, particularly in retinopathy of prematurity...
May 30, 2018: Asia-Pacific Journal of Ophthalmology
Nimet Yeşim Erçalık, Serhat İmamoğlu
Purpose: To evaluate the outcomes of Ahmed glaucoma valve (AGV) implantation in vitrectomized eyes. Materials and Methods: The medical records of 13 eyes that developed glaucoma due to emulsified silicon oil or neovascularization following pars plana vitrectomy and underwent AGV implantation were retrospectively reviewed. The main outcome measures were intraocular pressure (IOP), best-corrected visual acuity (BCVA), number of antiglaucoma medications, and postoperative complications...
2018: Journal of Ophthalmology
Katarzyna Michalska-Małecka, Justyna Sierocka-Stępień, Aneta Michalik-Jakubek, Katarzyna Witek, Katarzyna Nowomiejska, Anselm Jünemann, Robert Rejdak
PURPOSE: The aim of this study was to evaluate the effectiveness of treatment and the restoration of the anatomic conditions (retinal reattachment) in rhegmatogenous retinal detachment treated by pars plana vitrectomy (PPV) using air as endotamponade. METHODS: Twelve patients (12 eyes) with rhegmatogenous retinal detachment were included in the study. These were eyes with retinal detachment both with and without macular involvement. During the PPV surgery, the peripheral and central part of the vitreous body was excised to eliminate the formation of vitreoretinal traction after surgery, laser therapy was performed peripherally and in retinal openings, and the eyeball was filled with filtered air...
June 2018: Medicine (Baltimore)
Joanna Stafiej, Karolina Kaźmierczak, Katarzyna Linkowska, Paweł Żuchowski, Tomasz Grzybowski, Grażyna Malukiewicz
Purpose: To evaluate the expression profiles of the VEGF α and TGF β in the ERMs and ILMs in retinal disorders. Methods: In this nonrandomized prospective study, 75 patients (34 females and 41 males) referred to pars plana vitrectomy (PPV) due to different retinal diseases were enrolled to the study. The samples of ERMs and ILMs collected during PPV were immediately put in TRIzol® Reagent (Life Technologies, USA) and stored at -70°C until RNA extraction. Gene expression analysis was done with TaqMan® Gene Expression Assays (Applied Biosystems, USA) following the manufacturer's instructions...
2018: Journal of Ophthalmology
Norihiro Yamada, Takahiko Hayashi, Kentaro Yuda, Toshiki Shimizu, Itaru Oyakawa, Hidenori Takahashi, Naoko Kato
Purpose: To evaluate the clinical outcomes of Descemet membrane endothelial keratoplasty (DMEK) for vitrectomized eyes that underwent pars plana vitrectomy (PPV) and transscleral-sutured intraocular lens (IOL) implantation. Methods: In this retrospective study, DMEK cases were reviewed from medical records and divided into two groups: the eyes after PPV and transscleral-sutured IOL implantation (vitrectomized group) and the eyes with in-the-bag IOL implantation (control group) prior to DMEK...
2018: Journal of Ophthalmology
Sadık Görkem Çevik, Sami Yılmaz, Mediha Tok Çevik, Fatma Düriye Akalp, Remzi Avcı
Purpose: To compare the effectiveness of sustained-release dexamethasone (DEX) intravitreal implant in nonvitrectomized eyes and vitrectomized eyes with diabetic macular edema (DME). Methods: A retrospective review of the medical records of 40 eyes of 30 consecutive patients with diabetic macular edema who underwent intravitreal DEX implant injection. Patients were divided into 2 subgroups: 31 eyes that were nonvitrectomized (group 1) and 9 eyes that had previously undergone standard pars plana vitrectomy (group 2)...
2018: Journal of Ophthalmology
Rizwan Ahmad Chaudhary, Hussain Ahmad Khaqan, Ayesha Ahmad, Usman Imtiaz, Hassan Raza, Usman Shabbir
OBJECTIVE: To compare the safety and efficacy of topical anesthesia versus peribulbar anesthesia for 23-gauge pars plana vitrectomy. STUDY DESIGN: Randomized controlled trial. PLACE AND DURATION OF STUDY: Ophthalmology Department, Lahore General Hospital, Ameer-ud-Din Medical College, Postgraduate Medical Institute, Lahore from April 2013 to March 2016. METHODOLOGY: A total of 110 patients were equally divided (n=55) in group A (topical anesthesia) and group B (peribulbar anesthesia)...
June 2018: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
Cherng-Ru Hsu, Jiann-Torng Chen, Kuo-Ming Yeh, Chi-Kang Hsu, Ming-Cheng Tai, Ying-Jen Chen, Yun-Hsiang Chang
PURPOSE: To report the clinical features and treatment outcomes in a cluster of patients with endophthalmitis after cataract surgery caused by nontuberculous mycobacterium. PATIENTS AND METHODS: Retrospective chart review and noncomparative, consecutive case series. Nine consecutive cases of endophthalmitis, after cataract surgery in a local clinic, were referred to our hospital. The treatment outcomes and analysis of risk factors for infection are reported. RESULTS: The major symptoms at presentation were pain, redness, and decreased vision...
May 29, 2018: Eye
Hernán E Gras, María Gómez-Resa, Fernando Aguirre, Borja Corcóstegui
PURPOSE: The purpose of this study is to describe a new surgical instrument that simplifies 360° silicone band placement, alone or in combination with pars plana vitrectomy, for the treatment of rhegmatogenous retinal detachment. METHODS: The instrument has a straight shank and a curved component in the form of a partial helix, whose purpose is to encircle the perimeter of the eye globe below the rectus muscles. The distal tip of the helix is inserted through a small conjunctival incision in the superior temporal quadrant, and the shank is rotated 360° on its axis until the tip emerges from the insertion point...
May 1, 2018: European Journal of Ophthalmology
Mushfig I Karimov, Elmar M Gasymov, Irada J Aliyeva, Lale A Akhundova, Gunay R Rustambayova, Khalid D Aliyev
PURPOSE: To analyze the prevalence of residual subfoveal fluid (RSF) after pars plana vitrectomy in patients with proliferative diabetic retinopathy complicated by tractional detachment of the macula and the effect of RSF on the postoperative visual outcome. METHODS: This study was a prospective observational case study of the optical coherence tomography (OCT) records of 23 patients (24 eyes) with macula-off diabetic tractional retinal detachment (TRD) who underwent successful 23-gauge pars plana vitrectomy between July 2012 and December 2015...
May 23, 2018: Eye
Marco Coassin, Valentina Mastrofilippo, Jay M Stewart, Andrea Fanti, Matteo Belpoliti, Luca Cimino, Alfonso Iovieno, Luigi Fontana
PURPOSE: To determine long-term results of vitrectomy for lamellar macular holes (LMH). To evaluate how the type of lamellar macular hole (tractional vs. degenerative) and the crystalline lens status might influence visual outcomes. METHODS: We collected data from 106 patients with symptomatic lamellar macular hole that underwent pars plana vitrectomy with membranectomy and internal limiting membrane peeling. Best-corrected visual acuity (BCVA) and optical coherence tomography appearance were determined preoperatively and postoperatively...
May 21, 2018: Graefe's Archive for Clinical and Experimental Ophthalmology
Takayuki Baba, Tomohiro Nizawa, Toshiyuki Oshitari, Shuichi Yamamoto
Purpose: To compare the visual and surgical outcomes after a reuse or a replacement of a dislocated in-the-bag intraocular lens (IOL). Methods: This was a retrospective, nonrandomized case series at a single ophthalmological institution. Cases with an in-the-bag dislocation of an IOL were treated by pars plana vitrectomy and the reuse or the replacement of the IOL. The lens was held by intrascleral fixation of the haptics of the IOL under both conditions. The same dislocated IOL was reused in 6 eyes (group A) or it was replaced with another IOL in the other 9 eyes (group B)...
2018: Journal of Ophthalmology
Jonathan Aker, Jessica Dowling, Lawrence Halperin
Purpose: To report the case of a patient with Crystalens, an accommodating posterior-chamber intraocular lens (IOL), who experienced a myopic shift following subsequent vitrectomy with gas tamponade. We propose a hypothesis as to why this myopic shift occurred and analyze its validity based on current literature. Observations: A patient had cataract surgery with implantation of a Crystalens AT-50AO +21D. Preoperative A-scan measured anterior chamber depth (ACD) to be 3...
June 2018: American Journal of Ophthalmology Case Reports
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