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David R Chow - One of the best experts on this subject based on the ideXlab platform.
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ultrasound biomicroscopy of Sclerotomy sites the effect of vitreous shaving around Sclerotomy sites during pars plana vitrectomy
Retina-the Journal of Retinal and Vitreous Diseases, 2001Co-Authors: Khalid Al Sabti, Michael A Kapusta, Magdi Mansour, Olga Overbury, David R ChowAbstract:PURPOSE To study the difference in the amount of vitreous incarceration between conventional pars plana vitrectomy (PPV) and PPV with vitreous shaving around Sclerotomy sites. METHODS A dynamic in vivo examination using ultrasound biomicroscopy (UBM) was performed on the Sclerotomy sites of 22 eyes after PPV. Patients were divided into two groups. In the study group (n = 11), the vitreous was completely shaved from the internal initial Sclerotomy by cotton-tip depressed vitrectomy under coaxial illumination. In the control group (n = 11), no vitreous shaving was performed. RESULTS Vitreous incarceration into Sclerotomy sites was significantly less in the study group compared with the control group (P <0.001). No difference was seen among the three Sclerotomy sites regarding vitreous incarceration within individual eyes. No difference was seen between eyes operated by right- and left-handed surgeons. CONCLUSIONS Vitreous shaving of Sclerotomy sites using depressed vitrectomy significantly reduces vitreous incarceration. This may reduce the rate of Sclerotomy-related complications following PPV in selected cases.
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Ultrasound biomicroscopy of Sclerotomy sites: the effect of vitreous shaving around Sclerotomy sites during pars plana vitrectomy.
Retina (Philadelphia Pa.), 2001Co-Authors: Khalid Al Sabti, Michael A Kapusta, Magdi Mansour, Olga Overbury, David R ChowAbstract:PURPOSE To study the difference in the amount of vitreous incarceration between conventional pars plana vitrectomy (PPV) and PPV with vitreous shaving around Sclerotomy sites. METHODS A dynamic in vivo examination using ultrasound biomicroscopy (UBM) was performed on the Sclerotomy sites of 22 eyes after PPV. Patients were divided into two groups. In the study group (n = 11), the vitreous was completely shaved from the internal initial Sclerotomy by cotton-tip depressed vitrectomy under coaxial illumination. In the control group (n = 11), no vitreous shaving was performed. RESULTS Vitreous incarceration into Sclerotomy sites was significantly less in the study group compared with the control group (P
Carl D Regillo - One of the best experts on this subject based on the ideXlab platform.
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intraoperative Sclerotomy related retinal breaks for macular surgery 20 vs 25 gauge vitrectomy systems
American Journal of Ophthalmology, 2007Co-Authors: Richard Scartozzi, Amr Saad Bessa, Omesh P Gupta, Carl D RegilloAbstract:Purpose To compare the rate of intraoperative Sclerotomy-related retinal breaks (SRRB) between 20- and 25-gauge vitrectomy systems for the correction of macular pucker (MP) and macular hole (MH). Design Retrospective interventional case series. Methods Single institution review of 347 consecutive eyes of 333 patients between August 2003 and May 2005 receiving pars plana vitrectomy (PPV) for MP or MH repair. Eyes were excluded if they had any form of proliferative retinopathy, or if there was an intraoperative conversion of any Sclerotomy from 25- to 20- gauge. Results Fourteen (6.4%) of 219 eyes in the 20-gauge group had SRRB vs 4 (3.1%) of 128 eyes in the 25-gauge group (Fisher exact test, P value = .22). Conclusions There was a trend for slightly lower rates of intraoperative Sclerotomy-related retinal breaks, single or multiple, with 25-gauge PPV compared with 20-gauge PPV, but the differences were not statistically significant.
Lorenzo López-guajardo - One of the best experts on this subject based on the ideXlab platform.
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Assessment of Closure Competency of Sutureless Vitrectomy Sclerotomies After Scleral Hydration.
Current eye research, 2015Co-Authors: Javier Benitez-herreros, Lorenzo López-guajardo, Miguel Vazquez-blanco, Aurora Perez-crespo, Agustin Silva-matoAbstract:AbstractPurpose: To assess the influence that hydration applied on the Sclerotomy edges may have on incisional closure resistance after transconjunctival sutureless vitrectomy (TSV).Methods: Experimental, randomized and observer-masked study in which 23-gauge TSV was performed in 80 cadaveric pig eyes. Once each vitrectomy was finished, hydration with balanced salt solution (BSS) was applied on the Sclerotomy edges of one of the superior incision sites; no maneuver was performed on the other superior Sclerotomy. Intraocular pressure (IOP) was gradually increased by means of the vitrectomy system (Accurus; Alcon Laboratories, TX) until one of the superior sclerotomies opened, allowing internal ocular solution to escape.Results: In 45% of cases (36 of 80 eyes), sclerotomies subjected to hydration allowed intraocular fluid escape (p = 0.43). There were no differences when comparing opening pressure values of hydrated and non-hydrated sclerotomies (p = 0.19).Conclusions: Scleral hydration did not demonstrate ...
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Influence of the Sclerotomy use on mechanical incision competency in experimental model of vitrectomized eyes.
Current eye research, 2011Co-Authors: Javier Benitez-herreros, Lorenzo López-guajardo, Cristina Camara-gonzalez, Agustin Silva-matoAbstract:Purpose: To evaluate the influence of superior Sclerotomy use (vitreous cutter or illumination probe entrance) on the postoperative Sclerotomy closure competency using an experimental model of vitrectomized eye.Methods: Prospective, experimental, randomized and observer-masked experimental study in which 23 and 25-gauge transconjunctival sutureless vitrectomy was performed through oblique sclerotomies in the same cadaveric pig eye. Closure competency was determined by the resistance to intraocular fluid leak through the superior incisions in face of a progressive intraocular pressure (IOP) rise.Results: 120 eyes included. In 52.5% of cases, the vitreous cutter probe Sclerotomy showed intraocular fluid leakage first (p = 0.65). When comparing opening pressure values, there were no significant differences (p = 0.77) between the leakage pressure level of both sclerotomies depending on their use.Conclusions: Different uses of superior sutureless oblique sclerotomies do not seem to influence on TSV incision me...
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Experimental Model to Evaluate Mechanical Closure Resistance of Sutureless Vitrectomy Sclerotomies Using Pig Eyes
Investigative ophthalmology & visual science, 2011Co-Authors: Lorenzo López-guajardo, Javier Benitez-herreros, Agustin Silva-matoAbstract:PURPOSE. The purpose of this study was to report a novel model for comparing mechanical resistance to intraocular pressure (IOP) increases with 23-gauge (23G) and 25G transconjunctival sutureless vitrectomy (TSV) sclerotomies in the immediate postoperative period using an experimental model of a vitrectomized eye. METHODS. This was a prospective, experimental, randomized, and observer-masked experimental study in which TSV 23G and 25G oblique sclerotomies, performed in same cadaveric pig eye, were subject to an increase in IOP. Mechanical resistance was determined by the resistance to intraocular fluid leak through the Sclerotomy. The simultaneous use of the different Sclerotomy diameters in the same eye avoided interindividual scleral resistance differences. RESULTS. This animal model allowed comparison of the effect of different Sclerotomy diameters (23G and 25G) on incisional mechanical resistance. One hundred twenty eyes were included. In 60.7% of cases, the 23G Sclerotomy first allowed intraocular fluid escape (leaked; P 0.02). When comparing opening pressure values, 23G sclerotomies leaked at significantly lower pressure levels than 25G sclerotomies (P 0.0001); 53% of the 25G incisions but only 16% of 23G incisions opened at pressure levels greater than 120 mm Hg. CONCLUSIONS. Oblique 23G sutureless sclerotomies offer less mechanical resistance to increases in IOP than do 25G sclerotomies. This animal model may become the basis for future studies to evaluate the advantages of using other types of incision or other surgical tools on Sclerotomy closure capacity. (Invest Ophthalmol Vis Sci. 2011;52:4080‐4084) DOI:10.1167/ iovs.10-6812
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Ultrasound Biomicroscopy Study of Direct and Oblique 25-Gauge Vitrectomy Sclerotomies
American journal of ophthalmology, 2007Co-Authors: Lorenzo López-guajardo, Eduardo Vleming-pinilla, Jesús Pareja-esteban, Miguel Angel Teus-guezalaAbstract:Purpose To study 25-gauge Sclerotomy healing process in vivo with ultrasound biomicroscopy (UBM) in direct and oblique incisions. Design Prospective interventional case series report. Methods At our institution, we performed UBM studies on 53 sclerotomies during the first 30 days after 25-gauge vitrectomy, looking for conjunctival bleb development, Sclerotomy healing signs, and vitreous incarceration in the wound. Results Echographical healing signs were completed in 77% of patients by day 15 with no differences between direct and oblique sclerotomies. By day 30, all but one Sclerotomy were closed. Conjunctival blebs developed over 64% of direct sclerotomies, and 25% of oblique (P = .0059), but all resolved spontaneously by day 15. Vitreous incarceration appeared in 72% of sclerotomies. Conclusions Twenty-five gauge sclerotomies heal by day 15 in most cases with no difference between direct and oblique Sclerotomy construction. Conjunctival blebs developed more frequently over direct than oblique sclerotomies.
Khalid Al Sabti - One of the best experts on this subject based on the ideXlab platform.
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ultrasound biomicroscopy of Sclerotomy sites the effect of vitreous shaving around Sclerotomy sites during pars plana vitrectomy
Retina-the Journal of Retinal and Vitreous Diseases, 2001Co-Authors: Khalid Al Sabti, Michael A Kapusta, Magdi Mansour, Olga Overbury, David R ChowAbstract:PURPOSE To study the difference in the amount of vitreous incarceration between conventional pars plana vitrectomy (PPV) and PPV with vitreous shaving around Sclerotomy sites. METHODS A dynamic in vivo examination using ultrasound biomicroscopy (UBM) was performed on the Sclerotomy sites of 22 eyes after PPV. Patients were divided into two groups. In the study group (n = 11), the vitreous was completely shaved from the internal initial Sclerotomy by cotton-tip depressed vitrectomy under coaxial illumination. In the control group (n = 11), no vitreous shaving was performed. RESULTS Vitreous incarceration into Sclerotomy sites was significantly less in the study group compared with the control group (P <0.001). No difference was seen among the three Sclerotomy sites regarding vitreous incarceration within individual eyes. No difference was seen between eyes operated by right- and left-handed surgeons. CONCLUSIONS Vitreous shaving of Sclerotomy sites using depressed vitrectomy significantly reduces vitreous incarceration. This may reduce the rate of Sclerotomy-related complications following PPV in selected cases.
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Ultrasound biomicroscopy of Sclerotomy sites: the effect of vitreous shaving around Sclerotomy sites during pars plana vitrectomy.
Retina (Philadelphia Pa.), 2001Co-Authors: Khalid Al Sabti, Michael A Kapusta, Magdi Mansour, Olga Overbury, David R ChowAbstract:PURPOSE To study the difference in the amount of vitreous incarceration between conventional pars plana vitrectomy (PPV) and PPV with vitreous shaving around Sclerotomy sites. METHODS A dynamic in vivo examination using ultrasound biomicroscopy (UBM) was performed on the Sclerotomy sites of 22 eyes after PPV. Patients were divided into two groups. In the study group (n = 11), the vitreous was completely shaved from the internal initial Sclerotomy by cotton-tip depressed vitrectomy under coaxial illumination. In the control group (n = 11), no vitreous shaving was performed. RESULTS Vitreous incarceration into Sclerotomy sites was significantly less in the study group compared with the control group (P
Hiroshi Tsuneoka - One of the best experts on this subject based on the ideXlab platform.
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Influence of silicone oil tamponade on self-sealing Sclerotomy using 25-gauge transconjunctival sutureless vitrectomy: a retrospective comparative study
BMC ophthalmology, 2015Co-Authors: Hirotsugu Takashina, Akira Watanabe, Hiroshi TsuneokaAbstract:Background Characteristic complications have been reported for transconjunctival sutureless vitrectomy, such as postoperative Sclerotomy leakage and postoperative hypotony. Particular attention to Sclerotomy closure is required in cases of silicone oil tamponade, because postoperative supplementation of silicone oil implies reoperation, whereas postoperative supplement of gas is comparatively easy. This study investigated Sclerotomy closure in cases of silicone oil tamponade using 25-gauge transconjunctival sutureless vitrectomy.
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Factors influencing self-sealing of Sclerotomy performed under gas tamponade in 23-gauge transconjunctival sutureless vitrectomy
Clinical ophthalmology (Auckland N.Z.), 2014Co-Authors: Hirotsugu Takashina, Akira Watanabe, Katsuya Mitooka, Hiroshi TsuneokaAbstract:BACKGROUND The purpose of this study was to investigate factors influencing self-sealing of Sclerotomy performed under gas tamponade in 23-gauge transconjunctival sutureless vitrectomy. METHODS This study was a retrospective review of 84 patients (84 eyes) who underwent 23-gauge transconjunctival sutureless vitrectomy under gas tamponade by a single surgeon. At the end of surgery, the Sclerotomy was massaged to promote self-sealing. Factors influencing massage time were examined using multiple regression analysis. Independent variables were age, surgical time, vitreous incarceration, intraocular manipulation, and axial length. RESULTS Significant factors were intraocular manipulation and vitreous incarceration in the examination of all sclerotomies, age only in the examination of infusion sites, and vitreous incarceration only in the examination of manipulation sites. CONCLUSION In Sclerotomy performed with gas tamponade using 23-gauge transconjunctival sutureless vitrectomy, intraocular manipulation influenced self-sealing of Sclerotomy the most, followed by vitreous incarceration, and then age.
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Examination of Self-Sealing Sclerotomy for Vitrectomized Eye under Gas Tamponade in 23-Gauge Transconjunctival Sutureless Vitrectomy.
Seminars in ophthalmology, 2014Co-Authors: Hirotsugu Takashina, Akira Watanabe, Katsuya Mitooka, Hiroshi TsuneokaAbstract:AbstractIntroduction: To investigate whether a previous history of vitrectomy affects Sclerotomy self-sealing under gas tamponade in 23-gauge transconjunctival sutureless vitrectomy. Materials and Methods: This study retrospectively reviewed two groups, a vitrectomized group (seven consecutive cases) and an initial vitrectomy group (82 consecutive cases), who underwent 23-gauge transconjunctival sutureless vitrectomy at Jikei University School of Medicine Daisan Hospital in Tokyo. Factors affecting Sclerotomy self-sealing were examined using multiple regression analysis. The criterion variable was massage time, and independent variables were age, surgical time, axial length, vitreous incarceration, history of vitrectomy, preoperative intraocular pressure (IOP), and postoperative IOP. Results: Age (F = 10.4) was the only significant factor. History of vitrectomy was not a significant factor (F = 0.06). Conclusions: Previous history of vitrectomy does not affect Sclerotomy self-sealing under gas tamponade i...
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Factors predicting duration of intraocular gas presence after 23-gauge transconjunctival sutureless vitrectomy for rhegmatogenous retinal detachment.
Ophthalmic surgery lasers & imaging retina, 2014Co-Authors: Hirotsugu Takashina, Akira Watanabe, Katsuya Mitooka, Hiroshi TsuneokaAbstract:BACKGROUND AND OBJECTIVE To investigate factors predicting duration of intraocular gas presence in 23-gauge transconjunctival sutureless vitrectomy. PATIENTS AND METHODS Retrospective review of 130 eyes that underwent 23-gauge transconjunctival sutureless vitrectomy. At the end of surgery, gas exchange and Sclerotomy massage to promote self-sealing were performed. If Sclerotomy leakage was suspected despite Sclerotomy massage, a suture was placed. Factors predicting duration of intraocular gas presence in 23-gauge transconjunctival sutureless vitrectomy were examined using multiple regression analysis. An F value greater than 2 and P value less than 0.05 were considered statistically significant. RESULTS Significant factors were axial length (F = 7.08; P < .05) and IOP on postoperative day 1 (F = 4.35; P < .05). Age, operation time, preoperative IOP, and number of sutured sclerotomies were not statistically significant. CONCLUSION Factors predicting duration of intraocular gas presence in 23-gauge transconjunctival sutureless vitrectomy were axial length and postoperative IOP on day 1.