Characterization of a Standardized Ex-vivo Porcine Model to Assess Short Term Intraocular Pressure Changes and Trabecular Meshwork Vitality After Pars Plana Vitrectomy with Different Silicone Oil and BSS Tamponades

2017 ◽  
Vol 42 (8) ◽  
pp. 1130-1135 ◽  
Author(s):  
Martina Ebner ◽  
Siegfried Mariacher ◽  
José Hurst ◽  
Peter Szurman ◽  
Sven Schnichels ◽  
...  
Keyword(s):  
Intraocular Pressure ◽  
Trabecular Meshwork ◽  
Pars Plana Vitrectomy ◽  
Porcine Model ◽  
Silicone Oil ◽  
Ex Vivo ◽  
Short Term ◽  
Pars Plana ◽  
Pressure Changes

Intraocular pressure changes following 20G pars-plana vitrectomy

2011 ◽  
Vol 90 (8) ◽  
pp. 744-749 ◽  
Author(s):  
Carsten Framme ◽  
Susanne Klotz ◽  
Ute E.K. Wolf-Schnurrbusch ◽  
Peter Wiedemann ◽  
Sebastian Wolf
Keyword(s):  
Intraocular Pressure ◽  
Pars Plana Vitrectomy ◽  
Pars Plana ◽  
Pressure Changes

scholarly journals Assessment of Anterior Segment Changes in Pseudophakic Eyes, Using Ultrasonic Biomicroscopic Imaging, after Pars Plana Vitrectomy with Silicone Oil or Gas Tamponade

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Erkan Ünsal ◽  
Kadir Eltutar ◽  
Belma Karini ◽  
Osman Kızılay
Keyword(s):  
Intraocular Pressure ◽  
Pars Plana Vitrectomy ◽  
Silicone Oil ◽  
Morphological Changes ◽  
Anterior Segment ◽  
Anterior Chamber Depth ◽  
Ciliary Process ◽  
Pars Plana ◽  
Group 2 ◽  
Group 1

Objective. To evaluate the morphological changes of the anterior segment using ultrasonic biomicroscopy (UBM) imaging in pseudophakic patients who underwent pars plana vitrectomy (PPV) with silicone oil or gas (C3F8) internal tamponade agent injection.Method. This prospective study included pseudophakic patients with planned PPV, divided into two groups according to internal tamponade agent: those in which silicone oil was used (n=27, Group 1) and those in which gas (C3F8) was used (n=24, Group 2). UBM measurements were performed in the supine position before and one week after surgery.Results. In patients of Group 1, postoperative trabecular meshwork-ciliary process distance (T-CPD) and iris-ciliary process distance (I-CPD), according to preoperative values, were found to be statistically significantly reduced, and postoperative mean value of scleral thickness (ST) and intraocular pressure (IOP), according to preoperative value, was found to be statistically significantly increased. In patients of Group 2, postoperative mean values of anterior chamber depth (ACD), ciliary body thickness (CBT), T-CPD, I-CPD, and IOP, according to preoperative values, were found to be statistically significantly reduced. Preoperatively, in Group 2 patients, according to Group 1 patients, TIA and IOP were found to be statistically significantly increased. Preoperative and postoperative IOP between the measured parameters with UBM showed no statistically significant correlation.Conclusions. Gases cause more morphological changes in the anterior segment structures. It is thought that complications such as increased intraocular pressure can be seen more frequently for this reason.

scholarly journals Intraocular Pressure Elevation within Six Days After Vitreoretinal Surgery with Silicone Oil Injection for Rhegmatogenous Retinal Detachment

2021 ◽  
Author(s):  
Xiaoyan Zhang ◽  
Xiaofeng Hao ◽  
Like Xie
Keyword(s):  
Intraocular Pressure ◽  
Retinal Detachment ◽  
Pars Plana Vitrectomy ◽  
Rhegmatogenous Retinal Detachment ◽  
Silicone Oil ◽  
Topical Steroid ◽  
Pressure Elevation ◽  
Intraocular Pressure Elevation ◽  
Pars Plana ◽  
Oil Injection

Abstract Background: We investigated the incidence of and risk factors for intraocular pressure elevation within 6 days following pars plana vitrectomy with silicone oil injection for rhegmatogenous retinal detachment. Methods: We reviewed the records of 55 patients in whom pars plana vitrectomy with silicone oil injection was performed. The intraocular pressure was evaluated before surgery and 1 day, 3 days, and 6 days post-operatively. Results: Intraocular pressure elevation was found in 49% of eyes within 6 days after surgery. A long duration of rhegmatogenous retinal detachment was significantly associated with intraocular pressure elevation on day 1 after surgery. Presence of diabetes was significantly associated with intraocular pressure elevation at 3 days post-operation. Intraocular pressure elevation may occur 6 days following topical steroid use. Conclusions: Intraocular pressure should be monitored regularly in the early post-operative period after pars plana vitrectomy with silicone oil injection for rhegmatogenous retinal detachment, especially in patients with prolonged detachment and diabetic history.

scholarly journals Long-term intraocular pressure changes after pars plana vitrectomy: An 8-year study

2020 ◽  
Vol 32 (4) ◽  
pp. 335
Author(s):  
Touka Banaee ◽  
Arash Omidtabrizi ◽  
Vahid Ghavami ◽  
Masoud Shafiee ◽  
Razieh Bayani
Keyword(s):  
Intraocular Pressure ◽  
Pars Plana Vitrectomy ◽  
Pars Plana ◽  
Pressure Changes

Aerosol generation through pars plana vitrectomy

2020 ◽  
pp. bjophthalmol-2020-317214
Author(s):  
Hasan Naveed ◽  
Fong May Chew ◽  
Hanbin Lee ◽  
Edward Hughes ◽  
Mayank A Nanavaty
Keyword(s):  
Pars Plana Vitrectomy ◽  
Ex Vivo ◽  
Dynamic Changes ◽  
Aerosol Generation ◽  
Significant Difference ◽  
Optical Particle Counter ◽  
Pars Plana ◽  
23 Gauge ◽  
Set Up ◽  
Ex Vivo Study

PurposeTo assess whether pars plana vitrectomy (PPV) is an aerosol-generating procedure (AGP) in an ex vivo experimental model.MethodsIn this ex vivo study on 10 porcine eyes, optical particle counter was used to measure particles ≤10 μm using cumulative mode in the six in-built channels: 0.3 μm, 0.5 μm, 1 μm, 2.5 μm, 5 μm and 10 μm aerosols during PPV. Two parts of the study were as follows: (1) to assess the pre-experimental baseline aerosol count in the theatre environment where there are dynamic changes in temperature and humidity and (2) to measure aerosol generation with 23-gauge and 25-gauge set-up. For each porcine eye, five measurements were taken for each consecutive step in the experiment including pre-PPV, during PPV, fluid–air exchange (FAX) and venting using a flute with 23-gauge set-up and a chimney with 25-gauge set-up. Therefore, a total of 200 measurements were recorded.ResultsWith 23-gauge and 25-gauge PPV, there was no significant difference in aerosol generation in all six channels comparing pre-PPV versus PPV or pre-PPV versus FAX. Venting using flute with 23-gauge PPV showed significant reduction of aerosol ≤1 μm. Air venting using chimney with 25-gauge set-up showed no significant difference in aerosol of ≤1 μm. For cumulative aerosol counts of all particles measuring ≤5 μm, compared with pre-PPV, PPV or FAX, flute venting in 23-gauge set-up showed significant reduction unlike the same comparison for chimney venting in 25-gauge set-up.ConclusionPPV and its associate steps do not generate aerosols ≤10 μm with 23-gauge and 25-gauge set-ups.

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