scholarly journals The Changes of Retinal Saturation after Long-Term Tamponade with Silicone Oil

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Bingsheng Lou ◽  
Zhaohui Yuan ◽  
Liwen He ◽  
Lixia Lin ◽  
Qianying Gao ◽  
...  
Keyword(s):  
Oxygen Saturation ◽  
Silicone Oil ◽  
Oxygen Metabolism ◽  
Oil Removal ◽  
Silicone Oil Removal ◽  
Retinal Arterioles ◽  
Silicone Oil Tamponade ◽  
The Mean ◽  
Arteriovenous Difference

Purpose.To evaluate the effects of long-term tamponade with silicone oil on retinal saturation.Methods.A total of 49 eyes that received tamponade with silicone oil were included. The patients were divided into 3 groups (3–6 months, 6–9 months, and >9 months) according to the duration of silicone oil tamponade. Retinal oximetry was performed using the Oxymap system before and 2 months after silicone oil removal.Results.The mean retinal oxygen saturation before silicone oil removal was 107% ± 12% in the arterioles and 60% ± 10% in the venules, with an overall arteriovenous difference (AVD) of 47% ± 14%. The AVD in the >9-month group was significantly higher than that in the 3–6-month group (54% ± 16% versus 44% ± 11%,P=0.042). After silicone oil removal, the AVD in the >9-month group was significantly decreased (45% ± 9% versus 54% ± 16%,P=0.009); additionally, the arterioles were significantly wider than before surgery (10.8 ± 0.7 pixels versus 10.4 ± 0.9 pixels,P=0.015).Conclusions.The tamponade with silicone oil for more than 9 months will cause the alterations of retinal saturation and the narrowing of retinal arterioles, which may further interfere with the oxygen metabolism in the retina.

scholarly journals Intraocular silicone oil removal: timing, outcome, and silicone oil complications encountered

2019 ◽  
Vol 1 (1) ◽  
pp. 37-49
Author(s):  
Nurul Shima Ismail ◽  
Ling Kiet Phang ◽  
Teh Wee Min ◽  
Wan Haslina Wan Abdul Halim ◽  
Haslina Mohd Ali
Keyword(s):  
Silicone Oil ◽  
Optimal Timing ◽  
Oil Removal ◽  
Silicone Oil Removal ◽  
Long Duration ◽  
Number Of Patients ◽  
Pars Plana ◽  
Silicone Oil Tamponade

Introduction: Silicone oil is the preferred tamponade agent used in pars-plana vitrectomy for retinal detachment when a long duration of endotamponade is intended. Due to its possible long-term complications, removal of silicone oil (ROO) is recommended. Purpose: This study is done to evaluate the mean duration and complications of silicone oil tamponade, and the anatomical and visual outcomes after silicone oil removal. Study design: Retrospective study. Materials and methods: Retrospective review was done on 55 eyes of 55 patients, in which ROO was carried out at Hospital Sultanah Bahiyah in 2016 with a minimum six months follow-up postoperatively. Results: The duration of silicone oil tamponade in these eyes ranged from 1.0 to 55.5 months, with mean duration of 10.8 months (SD 7.74). Common complications of silicone oil tamponade observed were cataract in 30 eyes (54.5%), followed by secondary high intraocular pressure in 6 eyes (10.9%), and band keratopathy in 3 eyes (5.5%). Six eyes (10.9%) developed retinal re-detachment after oil removal.  The majority in the anatomically attached group post ROO (40 eyes, 81.6%) showed improvement of vision after ROO, with mean best corrected vision of LogMAR 1.38 (6/150) with silicone oil in situ to LogMAR 0.88 (6/48) at the latest follow-up. Conclusions: Although the recommended duration of silicone oil tamponade ranges from three to six months, the optimal timing for silicone oil removal still remains unknown. ROO is recommended due to oil-related complications, but the anatomical outcome should be evaluated as well. However, in our setting, with limited resources and time, and increasing number of patients indicated for silicone oil, it is impossible to comply with the recommended time for ROO and the timing is usually set on an individual basis.  

Endoscopy-Assisted Vitrectomy Outcomes During Silicone Oil Removal After Complex Retinal Detachment Repair

2019 ◽  
Vol 3 (6) ◽  
pp. 445-451 ◽  
Author(s):  
Natalia Vila ◽  
Emmanouil Rampakakis ◽  
Flavio Rezende
Keyword(s):  
Retrospective Study ◽  
Retinal Detachment ◽  
Pars Plana Vitrectomy ◽  
Silicone Oil ◽  
Endoscopic Examination ◽  
Oil Removal ◽  
Visualization System ◽  
Silicone Oil Removal ◽  
Pars Plana ◽  
The Mean

Purpose: This retrospective study recorded intraoperative findings during silicone oil removal and postoperative anatomical outcomes comparing endoscopy-assisted pars plana vitrectomy (E-PPV) vs pars plana vitrectomy (PPV) alone after proliferative vitreoretinopathy (PVR)-related retinal detachment (RD) repair. Methods: This single-center retrospective study included patients who underwent PPV for silicone oil removal after RD with PVR from July 2009 to January 2017. Patients with diabetic tractional RD, history of trauma, uveitis, or endophthalmitis were excluded. After 2013, an endoscopic visualization system (E2 MicroProbe; Endo Optiks) was used in a nonrandomized fashion. Data collection included reattachment rate, intraoperative endoscopic findings and phthisis rate. Results: Fifty-four eyes of 54 patients were included. The mean participant age was 58.4 ± 12.9 years and 36 (65.5%) participants were male. The mean (± SD) follow-up duration after oil removal was 24.3 ± 20.1 months. E-PPV combined with wide-angle visualization system was performed in 26 (48.1%) of the patients; the surgical management was modified after endoscopic examination in 17 (65.4%) of the cases. Reattachment rate in the E-PPV group was 96.2% compared with 76.0% in the PPV-alone group ( P = .04). Conclusions: E-PPV for silicone oil removal appears to be advantageous for prevention of RD recurrence, thus achieving better reattachment rates. A thorough examination is facilitated by endoscopic visualization and contributory factors for anterior PVR can be identified and treated.

scholarly journals Long-term outcome of scleral-fixated intraocular lens implantation without conjunctival peritomies and sclerotomy in ocular trauma patients

2019 ◽  
Author(s):  
Han Zhao ◽  
Wanpeng Wang ◽  
Zhengping Hu ◽  
Baihua Chen
Keyword(s):  
Intraocular Lens ◽  
Pars Plana Vitrectomy ◽  
Ocular Trauma ◽  
Silicone Oil ◽  
Trauma Patients ◽  
Oil Removal ◽  
Silicone Oil Removal ◽  
Pars Plana ◽  
Scleral Fixated Intraocular Lens

Abstract Background To investigate the long-term outcomes and complications of scleral-fixated intraocular lens (SFIOL) implantation without conjunctival peritomies and sclerotomy in patients with a history of ocular trauma with inadequate capsular support during primary pars plana vitrectomy or silicone oil removal. Methods Records of ocular trauma patients who underwent implantation of SFIOL without conjunctival peritomies and sclerotomy during primary pars plana vitrectomy or silicone oil removal. Results Sixty-nine eyes of 69 patients were included in this study. The median follow-up period was 34 months (range, 6-99 months). The average patient age at the time of surgery was 44 years old (range, 4-80 years). At the end of follow-up, the preoperative mean of best corrected visual acuity (BCVA) was 0.79 ± 0.86 log of the minimum angle of resolution (logMAR), which improved 0.20 ± 0.26 logMAR postoperatively (P = 0.01). BCVA improved or remained unchanged in 64 eyes (92.8%), VA decreased two lines in five eyes (7.2%). Early postoperative complications included transient corneal edema in seven eyes (10.1%), minor vitreous hemorrhage in four eyes (5.8%), transient elevated intraocular pressure (IOP) in one eye (1.4%), and hypotony in three eyes (4.3%). Late postoperative complications included persistent elevated IOP in five eyes (7.2%), epiretinal membrane formation in three eyes (4.3%), and cystoid macular edema noted in one eye (1.4%). Conclusion Use of a scleral-fixated intraocular lens implantation without conjunctival peritomies and sclerotomy in ocular trauma patients during either primary pars plana vitrectomy or second silicone oil removal is a valuable approach for the management of traumatic aphakia in the absence of capsular support.

scholarly journals Comparative analysis of two groups of patients according to the results of cataract phacoemulsification in combination with silicone oil removal through flat part of the ciliary body and posterior capsulorhexis in the long term after retinal detachment surgery

2020 ◽  
pp. 14-19
Author(s):  
A.M. Danilov ◽  
◽  
A.G. Grinev ◽  
M.B. Sviridova ◽  
◽  
...  
Keyword(s):  
Visual Function ◽  
Ciliary Body ◽  
Silicone Oil ◽  
Oil Removal ◽  
Silicon Oil ◽  
Flat Part ◽  
Silicone Oil Removal ◽  
Subjective Level

Purpose. To conduct a comparative analysis of two groups of patients according to the results of cataract phacoemulsification in combination with the silicone oil removal through flat part of the ciliary body and posterior capsulorhexis in the long term after retinal detachment surgery. Material and methods. 30 patients with a diagnosis of cataract, avitria, tamponade of the vitreous cavity with silicone oil OXANE 5700 were under observation. Patients were randomly divided into two groups. In both groups, the infusion system was installed through port 25 Ga located 3–4 mm from the limb, cataract phacoemulsification was performed in the first stage. In the first group (15 patients), silicon oil was removed through the posterior capsulorexis using a curved aspiration cannula of caliber 18 Ga. In the second group (15 patients) silicon oil was removed using aspiration through the second port of 25 Ga. The assessment of the functional and anatomical state after surgery was based on data from visometry, autorefractometry, ultrasound B-scanning of the vitreous cavity, and optical coherence tomography of the macular area. Assessment of patient satisfaction with the subjective level of quality of life was carried out using the validated visual function questionnaire Visual Function (VF-14). Results. In both groups, on average, there was a significant increase in the best corrected visual acuity. According to B-scan data, emulsified silicone oil particles were less detected in patients after removal of silicone oil through posterior capsulorexis. The subjective level of quality of life of each patient improved significantly in both groups. Conclusion. Performing the combined operation of cataract phacoemulsification with the removal of silicone oil through the posterior capsulorhexis in comparison with the silicone oil removal through the flat part of the ciliary body can equally improve visual function. Satisfaction with treatment results was slightly higher in the group with silicone oil removal through posterior capsulorexis. Key words: cataract, avitria, silicone oil, posterior capsulorexis.

scholarly journals Long-term outcome of scleral-fixated intraocular lens implantation without conjunctival peritomies and sclerotomy in ocular trauma patients

2019 ◽  
Author(s):  
Han Zhao ◽  
Wanpeng Wang ◽  
Zhengping Hu ◽  
Baihua Chen
Keyword(s):  
Intraocular Lens ◽  
Pars Plana Vitrectomy ◽  
Ocular Trauma ◽  
Silicone Oil ◽  
Trauma Patients ◽  
Oil Removal ◽  
Silicone Oil Removal ◽  
Pars Plana ◽  
Scleral Fixated Intraocular Lens

Abstract Background To investigate the long-term outcomes and complications of scleral-fixated intraocular lens (SFIOL) implantation without conjunctival peritomies and sclerotomy in patients with a history of ocular trauma with inadequate capsular support during primary pars plana vitrectomy or silicone oil removal. Methods Records of ocular trauma patients who underwent implantation of SFIOL without conjunctival peritomies and sclerotomy during primary pars plana vitrectomy or silicone oil removal. Results Sixty-nine eyes of 69 patients were included in this study. The median follow-up period was 34 months (range, 6-99 months). The average patient age at the time of surgery was 44 years old (range, 4-80 years). At the end of follow-up, the preoperative mean of best corrected visual acuity (BCVA) was 0.79 ± 0.86 log of the minimum angle of resolution (logMAR), which improved 0.20 ± 0.26 logMAR postoperatively (P = 0.01). BCVA improved or remained unchanged in 64 eyes (92.8%), VA decreased two lines in five eyes (7.2%). Early postoperative complications included transient corneal edema in seven eyes (10.1%), minor vitreous hemorrhage in four eyes (5.8%), transient elevated intraocular pressure (IOP) in one eye (1.4%), and hypotony in three eyes (4.3%). Late postoperative complications included persistent elevated IOP in five eyes (7.2%), epiretinal membrane formation in three eyes (4.3%), and cystoid macular edema noted in one eye (1.4%). Conclusions Use of a scleral-fixated intraocular lens implantation without conjunctival peritomies and sclerotomy in ocular trauma patients during either primary pars plana vitrectomy or second silicone oil removal is a valuable approach for the management of traumatic aphakia in the absence of capsular support.

scholarly journals A novel design silicone oil removal cannula

2021 ◽  
Vol 12 (12) ◽  
pp. 39-43
Author(s):  
Fevzi Akkan ◽  
Dincer Dinc
Keyword(s):  
Silicone Oil ◽  
Recovery Period ◽  
Oil Removal ◽  
Membrane Peeling ◽  
Silicone Oil Removal ◽  
Duration Of Surgery ◽  
The Mean ◽  
23 Gauge ◽  
Operative Recovery

Background: Silicone oil, which is one of the most commonly used endotamponades in vitreoretinal surgery, is removed after a certain period of time in most cases. In this study, we present our results with a unique cannula that provides effective and safe silicone oil removal. Aims and Objectives: To assess the aids and success of silicone oil removal with a novel 23-gauge cannula for the patients who underwent pars plana vitrectomy and silicone oil injection before. Materials and Methods: 72 eyes of 64 patients who operated by the same surgeon (FA) between May 2017 and May 2019 were involved in the study. The primary indications were proliferative diabetic retinopathy in 46 (63.9%) eyes and retinal detachment in 26 (36.1%) eyes. Phacoemulsification and intraocular lens implantation (23 eyes), membrane peeling (23 eyes), internal limiting membrane peeling (5 eyes), and argon laser endo-photocoagulation (37 eyes) performed in the same session. Furthermore, perfluorocarbon remnants aspirated in 9 eyes and 17 eyes needed suturing. Descriptive statistical analyses achieved by SPSS 10.5 statistical software. Results: The mean follow-up time was 11.7 + 2.5 months (between 3 and 23 months), and the mean age was 61.4 + 8.52 years (between 44 and 69 years). 1000 centistokes (cSt) silicone oil was removed from 61 (84.7%) eyes, and 5000 cSt silicone oil was removed from 11 (15.3%) eyes. The mean removal time was 2.04 + 0.1 min for 1000 cSt silicone oil and 5.11 + 0.3 min for 5000 cSt silicone oil. 4 re-detachment and 3 vitreous hemorrhage observed in follow-up period. Post-operative silicone oil remnants were not detected in any patient. Conclusion: The unique 23-gauge cannula provides silicone oil removal without any conjunctival cut-down and sclerotomy enlargement. Thus, it reduces the duration of surgery and post-operative recovery period.

scholarly journals Phacoemulsification of primary cataract by the second stage after vitreoretinal surgery of PDR patients.

2021 ◽  
Vol 23 (5) ◽  
pp. 452-458
Author(s):  
Karina Igorevna Konovalova ◽  
Mikhail Mikhailovich Shishkin ◽  
Rinat Rustamovich Fayzrakhmanov
Keyword(s):  
Silicone Oil ◽  
Vitreoretinal Surgery ◽  
Second Step ◽  
Oil Removal ◽  
Iol Implantation ◽  
Second Stage ◽  
Silicone Oil Removal ◽  
Silicone Oil Tamponade ◽  
Group 2 ◽  
Group 1

BACKGROUND: The «gold standart» for surgical treatment of patients with proliferative diabetic retinopathy (PDR is vitreoretinal surgery. However, the question of the timing of the removal of primary cataract in this category of patients remains open.AIM: To evaluate the efficacy of phacoemulsification of primary cataract by the second stage after vitreoretinal surgery of PDR patientsMETHODS: 67 cases of surgery treatment of patients with PDR and complicated primary cataract were enrolled. This patients were divided into two groups depending on the treatment tactics. In the 1st group patients were subjected to a two–step surgical procedure: vitreoretinal surgery with silicone oil tamponade performed as the 1st step in their treatment; followed by the 2d step, phacoemulsifi tion surgery and silicone oil removal, and the IOL implantation, respectively. In the 2d group phacoemulsifi tion performed simultaneously with vitreoretinal surgery: phacoemulsification, IOL implantation, vitreoretinal surgery with silicone oil tamponade. The second step differed in the removal of silicone oil from the vitreous cavity.RESULTS: Visual functions improved in 88.6% of cases in group 1, and in 68.7% in group 2.CONCLUSIONS: Outcomes of the preliminary studies suggest that it is more viable to perform phacoemulsification surgery sometime later along with silicone oil removal on PDR patients with complicated primary cataract. This sequence of treatment procedure ensures a more gentle approach to the anatomic structures of the eye during the first stage (vitreoretinal surgery) and contributes to the reduction in the number of intraoperative and postoperative complications.

Ultrastructural effects of silicone oil on the clear crystalline lens of the human eye

2018 ◽  
Vol 28 (5) ◽  
pp. 566-572
Author(s):  
Wael Soliman ◽  
Mohamed Sharaf ◽  
Khaled Abdelazeem ◽  
Dalia El-Gamal ◽  
Allam Nafady
Keyword(s):  
Electron Microscopy ◽  
Epithelial Cells ◽  
Silicone Oil ◽  
Lens Epithelial Cells ◽  
Oil Removal ◽  
Electron Microscopic ◽  
Anterior Capsule ◽  
Lens Extraction ◽  
Silicone Oil Removal ◽  
Silicone Oil Tamponade

Purpose: To evaluate light and electron microscopic changes of the anterior capsule and its epithelium after clear lens extraction of vitrectomized myopic eyes with silicone oil tamponade. Methods: This prospective, controlled, non-randomized, interventional study included 20 anterior lens capsular specimens that were excised during combined clear lens extraction and silicone oil removal from previously vitrectomized highly myopic patients with silicone oil tamponade for previous retinal detachment surgeries. The specimens were examined via light microscopy and electron microscopy and compared with 20 anterior capsule specimens removed during clear lens extraction of non-vitrectomized highly myopic eyes. Results: Light microscopic examination of clear lens anterior capsule specimens of vitrectomized myopic eyes filled with silicone oil showed relatively more flat cells with irregular outline of lens’ epithelial cells with wide intercellular spaces, deeply stained nuclei, and multiple intracytoplasmic vacuoles. Scanning electron microscopy revealed collagenous surfaces filled with multiple pits, depressions, and abnormal deposits. Transmission electron microscopy revealed lens epithelial cells with apoptotic changes, many cytoplasmic vacuoles, and filopodia-like protrusions between lens epithelial cells and the capsule. Epithelial proliferation and multilayering were also observed. Conclusion: silicone oil may play a role in the development of apoptotic and histopathological changes in clear lens epithelial cells. Clarity of the lens at the time of silicone oil removal does not indicate an absence of cataractous changes. We found justification of combined clear lens extraction and silicone oil removal or combined phacovitrectomy when silicone oil injection is planned, but further long-term studies with larger patient groups are required.

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