scholarly journals Passive Removal of Silicone Oil with Temporal Head Position through Two 23-Gauge Cannulas

2016 ◽  
Vol 2016 ◽  
pp. 1-4 ◽  
Author(s):  
Zhong Lin ◽  
Zhi Sheng Ke ◽  
Qian Zheng ◽  
Zhen Quan Zhao ◽  
Zong Ming Song
Keyword(s):  
Silicone Oil ◽  
Fast Method ◽  
Oil Removal ◽  
Slit Lamp ◽  
New Approach ◽  
The Mean ◽  
23 Gauge ◽  
Mean Time ◽  
Vitrectomy System ◽  
Air Exchange

Purpose. To report a new approach for removal of silicone oil. Methods. All surgeries were performed using 23-gauge vitrectomy system with two transconjunctival sutureless cannulas. At the beginning, most of the silicone oil was removed by traditional microinvasive vitrectomy system through inferior-temporal cannula. Then, the blood transfusion tube is removed from the inferior-temporal cannula, and the fluid-air exchange is performed. A passive fluid-air exchange was performed to aspirate the residual silicone oil after gradually turning the patient’s head temporally by approximately 90° gradually. Results. After the surgery, all patients had a clear anterior chamber and vitreous cavity on slit lamp and B scan examination, respectively. The mean time taken for silicone oil removal and total surgery was 8.0±1.4 minutes and 12.4±2.5 minutes, respectively. The mean intraocular pressure 1 day, 3 days, 1 week, 1 month, and 3 months after surgery was 9.0±5.8 mmHg, 11.3±7.6 mmHg, 16.1±6.9 mmHg, 17.7±4.8 mmHg, and 17.1±3.5 mmHg, respectively. Conclusion. This new approach may provide a safe and fast method to remove the silicone oil.

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.

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 Radial Retinotomies with Endodiathermy for Severe Proliferative Vitreoretinopathy: Short-Term Results

2016 ◽  
Vol 2016 ◽  
pp. 1-9
Author(s):  
Zhaoxin Jiang ◽  
Suo Qiu ◽  
Bingsheng Lou ◽  
Miaoli Lin ◽  
Junlian Tan ◽  
...  
Keyword(s):  
Silicone Oil ◽  
Fundus Photography ◽  
Oil Removal ◽  
Efficacy And Safety ◽  
Slit Lamp ◽  
Less Invasive Surgery ◽  
Short Term ◽  
Noncomparative Trial ◽  
Slit Lamp Microscopy ◽  
Observation Period

Purpose.Retinal redetachment of silicone oil-filled eyes continues to be a frustrating condition that typically requires retinectomy. We proposed radial retinotomy as a potentially less invasive surgery. Here, we preliminarily explored its feasibility, efficacy, and safety.Methods.Totally 9 eyes of 9 consecutive patients were included in a prospective noncomparative trial. A series of retinotomies were created by endodiathermy in a radial pattern to relax the foreshortened retina. The eye was refilled with fresh silicone oil. The treated eyes were examined via visual acuity (VA) tests, tonometry, slit-lamp microscopy, and fundus photography during a 6-month observation period.Results.The procedure was completed in an average of 28 minutes from silicone oil removal to fresh silicone oil placement. Fundus photography demonstrated that 7 of the 9 eyes (78%) exhibited retinal reattachment. On average, VA was significantly improved within the first 2 weeks (P=0.02) and remained stable for the following 6 months. The change in intraocular pressure was not significant (P=0.76), and no adverse event was observed (0%).Conclusion.Radial retinotomies with endodiathermy were shown to be feasible, effective, and safe in selected cases of inferior contracted retina without vitreous base fibrosis over a 6-month observation period. This trial is registered withNCT02201706.

Approximating Transition Probabilities and Mean Occupation Times in Continuous-Time Markov Chains

1987 ◽  
Vol 1 (3) ◽  
pp. 251-264 ◽  
Author(s):  
Sheldon M. Ross
Keyword(s):  
Markov Chains ◽  
Continuous Time ◽  
Transition Probabilities ◽  
Random Time ◽  
Occupation Times ◽  
New Approach ◽  
Continuous Time Markov Chains ◽  
The Mean ◽  
Mean Time

In this paper we propose a new approach for estimating the transition probabilities and mean occupation times of continuous-time Markov chains. Our approach is to approximate the probability of being in a state (or the mean time already spent in a state) at time t by the probability of being in that state (or the mean time already spent in that state) at a random time that is gamma distributed with mean t.

TRANSCORNEAL SUTURELESS SILICONE OIL REMOVAL USING 23-GAUGE TROCAR SYSTEM IN APHAKIA

2018 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
Isil Sayman Muslubas ◽  
Mumin Hocaoglu ◽  
Mehmet Giray Ersoz ◽  
Serra Arf ◽  
Murat Karacorlu
Keyword(s):  
Silicone Oil ◽  
Oil Removal ◽  
Silicone Oil Removal ◽  
23 Gauge

scholarly journals Retinal Sensitivity before and after Silicone Oil Removal Using Microperimetry

2019 ◽  
Vol 2019 ◽  
pp. 1-5
Author(s):  
Ghada A. Nassar ◽  
Maha M. Youssef ◽  
Lameece M. Hassan ◽  
Hebatalla S. Makled
Keyword(s):  
Silicone Oil ◽  
Retinal Sensitivity ◽  
Oil Removal ◽  
Corrected Visual Acuity ◽  
Significant Difference ◽  
Before And After ◽  
Group A ◽  
The Mean ◽  
Group B ◽  
Best Corrected Visual Acuity

The purpose of the study is to assess the retinal sensitivity, using microperimetry, before and after silicone removal. It included 22 patients admitted for silicone removal after vitrectomy for macula-off retinal detachment. Patients were divided into 2 groups according to the duration of silicone tamponade: Group A: <3 months (included 10 patients), and Group B: 3–6 months (included 12 patients). Retinal sensitivity was tested, using microperimetry, one day before and one month after silicone removal. The best-corrected visual acuity (in LogMAR) significantly improved postoperatively (0.69 versus 1.06 and 0.69 versus 1.07 in Groups A and B, respectively). The mean intraocular pressure (IOP) was 12.89 ± 1.05 mmHg postoperatively versus 14.89 ± 1.76 mmHg preoperatively in Group A (p=0.011) and was 13.33 ± 1.30 mmHg postoperatively versus 15.33 ± 3.11 mmHg preoperatively in Group B (p=0.008). In Group A, the mean postoperative overall retinal sensitivity was 8.70 ± 2.56 dB versus 5.68 ± 2.00 dB preoperatively (p=0.008). In Group B, it was 9.83 ± 3.36 dB versus 7.00 ± 2.55 dB (p=0.002). No statistically significant difference was found between the two groups as regards improvement in overall retinal sensitivity. We concluded that the overall retinal sensitivity significantly increased following silicone removal in both groups. This trial is registered with ISRCTN43187564.

Passive Silicone Oil Removal in 23-Gauge Transconjunctival Vitrectomy

2011 ◽  
Vol 42 (6) ◽  
pp. 514-515 ◽  
Author(s):  
Osman Çekiç ◽  
Mehmet Çakir ◽  
Ö. Faruk Yilmaz
Keyword(s):  
Silicone Oil ◽  
Oil Removal ◽  
Silicone Oil Removal ◽  
23 Gauge ◽  
Transconjunctival Vitrectomy

Removal of Sticky Silicone Oil Adhered to the Retinal Surface: Comparison of Methodological Safety and Effectiveness

2021 ◽  
Author(s):  
Ziqi Wang ◽  
Zongduan Zhang ◽  
Xuting Hu ◽  
Zhaoliang Zhang ◽  
Qintuo Pan
Keyword(s):  
Silicone Oil ◽  
Case Series ◽  
Internal Limiting Membrane ◽  
Ilm Peeling ◽  
Retinal Surface ◽  
Disc Diameter ◽  
Minimum Angle ◽  
Oil Residue ◽  
The Mean ◽  
23 Gauge

Abstract Purpose: To compare safety and effectiveness among methods to remove sticky silicone oil bubbles adhered to the retinal surface. Methods: This retrospective nonrandomised case series included 14 eyes of 14 patients who had sticky silicone oil residue during silicone oil removal surgery. For small sticky silicone oil bubbles (<2-disc diameter), aspiration was performed with a 23-gauge vitreous cutter. Residual tiny oil bubbles were then removed with a silicone-tipped flute needle or internal limiting membrane (ILM) peeling. For large sticky silicone oil bubbles (≥2-disc diameter) that could not be removed with a 23-gauge vitreous cutter, we devised a more efficient active removal method involving a modified 22-gauge venous indwelling cannula device. Results: The mean preoperative best-corrected visual acuity (BCVA; logarithm of the minimum angle of resolution [logMAR]) significantly improved from 1.28±0.63 logMAR to 0.77±0.58 logMAR (p=0.014). The postoperative BCVA and improvement in BCVA were significantly better in the ILM peeling group than in the non-ILM peeling group (p=0.004 and p=0.045, respectively). Postoperative complications included residual sticky silicone oil bubbles in seven eyes without ILM peeling (50.0%), retinal neuroepithelial layer damage in two eyes (14.3%), and temporary hypotony in five eyes (35.7%). Conclusion: Various methods can safely and efficiently remove sticky silicone oil bubbles adhered to the retinal surface. A 22-gauge venous indwelling cannula enabled simple and safe removal of large sticky silicone oil bubbles, while small residual sticky silicone oil bubbles could be completely removed by ILM peeling.

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