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Results for “Vitrectomy”

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At least 973 records · Page 54Linked to original sources

PubMedDate not supplied

Self-sealing sclerotomies for sutureless pars plana vitrectomy.

OBJECTIVE: To determine the efficacy of self-sealing pars plana sclerotomies for vitrectomy and to identify complications associated with this new technique. METHOD: There were 150 self-sealing sclerotomies performed in 50 patients undergoing pars plana vitrectomy between October 1996 and March 1998. RESULTS: Of the 150 sclerotomies, 115 (76.6%) did not require suturing while 35 (23.3%) were closed with one radial 7.0 vicryl suture. The scleral tunnel incisions ensured minimal loss of intraocular fluids during instrument exchange and scleral plugs were not required to avoid ocular hypotony during scleral indentation. Distortion of scleral flap incisions requiring a suture were commonly seen in procedures using multiple instrumentations and extensive explants. CONCLUSIONS: Sutureless sclerotomies are simple to perform, save operative time, and reduce the risk of peroperative hypotony following removal of instruments or the infusion cannula. The technique reduces postoperative inflammation, suture-related problems including astigmatism, and allows more rapid rehabilitation.

Adult↗

PubMed2001

[Vitrectomy for vitreomacular traction syndrome].

PURPOSE: To describe the clinical characteristics of the vitreomacular traction syndrome and to evaluate the results of vitreous surgery for this syndrome. METHODS: We retrospectively studied 5 consecutive symptomatic eyes with vitreomacular traction syndrome, which underwent vitrectomy and posterior hyaloid stripping. RESULTS: Intraoperative observation confirmed partial posterior vitreous separation. After surgery visual acuity improved in four eyes and remained in one eye. All eyes were followed for at least 3 months. Complications of vitreous surgery included progression of nuclear sclerosis (3 eyes) and retinal rupture (1 eye). CONCLUSION: Vitreomacular traction syndrome can produce visual deficit. Vitrectomy surgery to release macular traction allows resolution of macular cystoid changes and improvement of visual acuity.

Aged↗

PubMed2001

[Vitrectomy for diabetic cystoid macular edema].

PURPOSE: We evaluated the visual outcome of vitrectomy for diabetic cystoid macular edema. METHODS: Visual outcome and factors which may influence final visual acuity were assessed and documented retrospectively in 45 eyes of 40 patients, all of whom were followed for at least 6 months postoperatively. RESULTS: Final postoperative visual acuity was two or more lines better than preoperative visual acuity in 58%, within one line in 40%, and had decreased by two lines or more in 2%. A final postoperative visual acuity of 0.5 or better was achieved in 38%. Preoperative visual acuity and the extent of the cystoid space on fluorescein angiography were significantly related to final visual acuity. A final postoperative visual acuity of 0.5 or better was noted in 8% of eyes with a preoperative visual acuity below 0.1, in 50% of eyes with preoperative visual acuity of 0.1 or better, in 71% of eyes with a cystoid space smaller than 5 disc areas, and in 20% of eyes with a cystoid space of 5 disc areas or more. The posterior vitreous membrane condition did not influence final visual acuity. There were no complications which decreased visual acuity. CONCLUSION: Based on the above results, we conclude that diabetic cystoid macular edema is a good indication for vitrectomy regardless of the posterior vitreous membrane condition. A preoperative visual acuity of 0.1 or better and/or a cystoid space smaller than 5 disc areas may be indications for surgery aimed at achieving a final postoperative visual acuity of 0.5 or better.

Adult↗

PubMedDate not supplied

Postoperative complications following vitrectomy for proliferative diabetic retinopathy with sew-on and noncontact wide-angle viewing lenses.

BACKGROUND AND OBJECTIVE: To compare the occurrence of vitreous hemorrhages and retinal detachments following vitrectomy surgery with sew-on lenses to a noncontact wide-angle lens system. PATIENTS AND METHODS: Retrospective review of 180 patients who underwent primary vitrectomy for proliferative diabetic retinopathy. The occurrence of persistent and recurrent vitreous hemorrhages as well as postoperative retinal detachments in the two groups was determined. RESULTS: There was no statistically significant difference in the occurrence of persistent vitreous hemorrhages between the sew-on (55%) and the wide-angle (42%) lens systems (P = 0.099). Likewise, recurrent vitreous hemorrhages were similar in both the sew-on (15%) and the wide-angle (17%) lens systems (P = 0.838). However, postoperative detachments were more frequent in the sew-on group (9%) than in the wide-angle (1%) group (P = 0.046). CONCLUSION: In patients with proliferative diabetic retinopathy, using a wide-angle noncontact lens system significantly reduced the incidence of postoperative retinal detachments, but not persistent or recurrent vitreous hemorrhages.

Diabetic Retinopathy↗

PubMed2001

[Idiopathic vitreomacular traction syndrome. Vitrectomy results].

PURPOSE: Evaluate the visual results, the complications and the prognosis factors of surgery for idiopathic vitreomacular traction syndrome. METHODS: We retrospectly reviewed 29 consecutive eyes that had undergone pars plana vitrectomy and posterior epiretinal membrane peeling for idiopathic vitreomacular traction syndrome. RESULTS: The mean follow-up after surgery was 17.7 months. Among the 29 cases, 21 were phakic. Visual acuity improved by 2 lignes or more in 72.4% of the cases and the mean improvement was 2.7. Eyes with preoperative visual acuity of 0.25 or more had better postoperative vision than the others (0.42vs0.65;p=0.006). During the follow-up, 10 patients underwent phacoemulsification and posterior chamber implantation (47.6%). The mean visual acuity of these 10 cases was poorer than the mean visual acuity of the 8 pseudophakic patients that underwent vitrectomy (0.45vs0.61;p=0.046). Five recurrences of epiretinal membrane were observed (17.2%). CONCLUSIONS: Surgical treatment of vitreomacular traction syndrome improves visual acuity in most of cases. Further studies with optical coherence tomography are necessary to understand the pathogenic mechanisms of vitreomacular interface syndromes.

Aged↗

PubMedDate not supplied

Evaluation of glutaraldehyde and povidone iodine for sterilization of wide-field contact vitrectomy lenses.

BACKGROUND AND OBJECTIVE: Wide-field vitrectomy contact lenses are currently sterilized with ethylene oxide gas, and other lenses with autoclaving. To maintain a large inventory or possibly run the risk of loss of lens quality with repeated autoclaving, glutaraldehyde 2% and povidone iodine 5% solution were evaluated as possible sterilizing agents. MATERIALS AND METHODS: Ethylene oxide presterilized lenses were contaminated with known concentrations (10(5) organisms/mL) of bacteria (S. epidemidis, P. aeruginosa, B. subtilis), and fungi (A. flavus, C. albicans) for 5 minutes. The test lenses were treated with glutaraldehyde or povidone iodine for 5, 10, 30, 60, and 120 minutes, and controls with sterilized water for a similar duration. Following treatment, both test and control lenses were sampled with sterile cotton swabs. The swabs were cultured for bacteria (tryptone soya broth 48 hours), and fungi (Saubourd's dextrose broth 5 days). RESULTS: The culture was negative for both glutaraldehyde- and povidone iodine-treated lenses against all organisms at all time points except B subtilis, which needed 120 minutes treatment. CONCLUSION: Two hours contact time with glutaraldehyde 2% or providone iodine 5% can sterilize vitrectomy contact lenses against common bacteria and fungi without affecting lens quality.

Bacteria↗

PubMedDate not supplied

[Closed anterior manual vitrectomy as a method of treatment in vitreal complications of intraocular lenses].

Fifty-five closed anterior manual vitrectomies were carried out in patients with vitreal complications after cataract extraction with implantation of posterior-chamber intraocular lenses. The results indicate high efficiency of anterior vitrectomy as a method for surgical treatment of sluggish uveitis, keratopathy, macular edema, secondary glaucoma, developing as a result of vitreous prolapse during implantation of the posterior-chamber intraocular lens. The operations were performed through transscleral and corneolimbic accesses. No cases of intraocular lens dislocation occurred.

Eye Diseases↗

PubMedDate not supplied

Postoperative complications after simultaneous vitrectomy and cataract surgery.

OBJECTIVE: We reviewed postoperative complications after simultaneous vitrectomy, phacoemulsification, aspiration, and acryl lens insertion. PATIENTS AND METHODS: Combined surgery was performed in 316 eyes of 279 patients between 1995 and 1997. Postoperative observation was continued in all of them for more than 6 months. The diagnoses that led to vitrectomy included diabetic retinopathy in 155 eyes, rhegmatogenous retinal detachment in 64 eyes, macular hole in 43 eyes, and other diseases in 93 eyes. The rate of postoperative complications that needed any reoperation was investigated. RESULTS: Reoperations were needed for intravitreal hemorrhage in 23 eyes (7.3%), retinal detachment in 15 eyes (4.7%), rubeotic glaucoma in 6 eyes (1.9%), and other conditions in 4 eyes (1.3%). Among them, reoperations were performed on 13 eyes (4.1%) twice and more. A removal of an intraocular lens was needed in 16 eyes (5.1%) for treatment of vitreoretinal disease. In patients with diabetic retinopathy, reoperations were needed for intravitreal hemorrhage in 21 eyes (13.5%), rubeotic glaucoma in 6 eyes (3.9%), other diseases in 4 eyes (2.6%), and a removal of an intraocular lens was needed in 10 eyes (6.5%) at a higher rate than the other disease. CONCLUSION: This combined surgery is considered advantageous for removing peripheral vitreous, while preventing these complications is important for preserving visual function.

Acrylic Resins↗

PubMed2001

[Evaluation of central retinal sensitivity after vitrectomy with removal of choroidal neovascular membrane for age-related macular degeneration].

PURPOSE: To evaluate retinal sensitivity in patients with age-related macular degeneration (AMD) before and after surgery. METHODS: Seven consecutive patients with AMD underwent vitrectomy with removal of choroidal neovascular membrane(CNV). Static microperimetry using a scanning laser ophthalmoscope(SLO) was performed before and after surgery. Central dense scotoma size was measured. RESULTS: Retinal sensitivity improved in all cases. Mean size of the central dense scotoma was decreased by 42%(range 14-62%). CONCLUSION: The results suggest that vitrectomy with removal of CNV can improve the central retinal sensitivity.

Aged↗

PubMed2001

Cost analysis in vitrectomy: monitored anesthesia care and general anesthesia.

A retrospective study was performed to compare differences in hospital charges between monitored anesthesia care with retrobulbar block and general anesthesia among patients having vitrectomy. Of 128 consecutive patients undergoing vitrectomy between July 1996 and July 1997, group 1 received general anesthesia (n = 41), group 2 received monitored care anesthesia with retrobulbar block (n = 59), and 28 patients were eliminated from the study. There were significant differences in anesthesia charges, operating room charges, pharmacy charges, and total hospital charges between groups 1 and 2. Charges associated with monitored care anesthesia with retrobulbar block are 20% less than charges associated with general anesthesia. Fewer patients in group 2 required postoperative intravenous narcotics than in group 1.

Aged↗

PubMed1999

[Application of perfluorocarbon liquids in vitrectomy].

OBJECTIVE: To popularize the use of perfluorocarbon liquids in vitrectomy and increase the cure rate of complicated retinal detachment. METHODS: The clinical application of perfluorocarbon liquids during vitrectomy for complicated retinal detachment of 76 eyes has been summarized. The postoperative retinal detachment rate and visual acuity of 54 eyes with retinal detachment complicated with severe proliferative vitreoretinopathy and 11 eyes with giant retinal tears were analyzed statistically. RESULTS: The retina was reattached in 71 of 76 eyes (93.4%), in 50 of 54 eyes with severe PVR (92.6%) and in 9 of 11 eyes with giant retinal tears (81.8%). The postoperative visual acuity was above 0.02 in 69 eyes (90.8%) and > 0.1 in 29 eyes (38.2%) of 76 eyes, respectively in 50 (92.6%) and 18 (33.3%) of 54 eyes with severe PVR and 9 (81.8%) and 4 (36.4%) of 11 eyes with giant retinal tears. During surgery, perfluorocarbon entered through tears into subretinal space and was removed immediately in 6 of 76 eyes. Postoperatively, a small portion of residual perfluorocarbon liquid was observed in the anterior chamber of 17 of 76 eyes and in the vitreous cavity of 2 phakic eyes of 76 eyes, no complication was observed except one case with mild corneal opacification. CONCLUSION: Perfluorocarbon liquids are the useful adjunct to the hydrokinetic manipulation in vitreous surgery.

Adolescent↗

PubMed1999

[Treatment of age-related macular degeneration by surgical removal of subfoveal neovascular membrane with vitrectomy].

OBJECTIVE: To investigate the therapeutic effect of surgical removal of subfoveal neovascular membrane with vitrectomy in treatment of age-related macular degeneration. METHODS: 30 patients (30 eyes) with the macular degeneration were selected. The duration of the disease was limited less than 2 years and the size of the neovascular membrane was limited to <or= 3 disc diameters. The neovascular membrane was removed through the retinotomy superiotemporal to the macula after closed vitrectomy. The vitreous cavity was replaced by 30% SF(6) after gas/fluid exchange and the patients took prone position postoperatively. RESULTS: The visual acuity was improved in 17 (56.7%, the best one 20/60), unchanged in 8 (26.7%) and decreased in 5 (16.7%) of the 30 eyes after operation. The post-operative complications were as follows: retinal detachment in 1 eye, centripetal retinal pucker to the retinotomy in 3 eyes and recurrence of neovascular membrane in 3 eyes. Transmission electron microscopy showed that the specimens were mainly composed of neo-capillary vessels. CONCLUSIONS: Certain therapeutic effects can be seen after the operation. However, the improvement of visual acuity in most of the cases is not very significant.

Aged↗

PubMed1998

[A preliminary observation on vitrectomy combined with autologous platelet concentrate for the treatment of idiopathic macular holes].

OBJECTIVE: To investigate the efficacy of vitrectomy combined with autologous platelet concentrate for the treatment of idiopathic macular holes. METHODS: Fifteen eyes of 14 patients with idiopathic macular hole were treated. The follow-up period ranged from 3 to 16 months. Postoperatively, visual acuity, macular threshold, Amsler grid, fluorescein angiography (FA) and complications were evaluated. RESULTS: Of the fifteen eyes, the closure of the holes was achieved in 13 eyes (86.7%), visual acuity improved for two lines or more in 12 eyes (80.0%). The postoperative visual acuities in patients with abnormal Amsler grid were improved. No significant differences were found in the macular threshold (P = 0.34). Postoperative FA showed that the blocked fluorescence at the site of the macular hole which was surrounded by a hyperfluorescence ring (window defect) in three eyes. The intraoperative complication was primarily the retinal hole, and the postoperative complication was chiefly the aggravation of cataract. CONCLUSIONS: These results indicate that vitrectomy combined with autologous platelet concentrate can seal the macular hole well and improve the visual acuity in most patients. A large multicenter randomized prospective study and a longer period of follow-up are needed to verify these results.

Blood Transfusion, Autologous↗

PubMed1998

[Vitrectomy for treatment of retinal detachment caused by macular hole].

OBJECTIVE: To evaluate the effect of vitrectomy and autoserum for treatment of retinal detachment caused by macular hole. METHODS: 19 eyes with retinal detachment caused by macular hole were treated with gas tamponade (C(3)F(8)). The follow-up periods ranged from 6 to 24 months. In the case whose macular hole failed to heal, removal of the remains of prefoveal membrane and/or scratching at the retinal pigment epithelium (RPE) and placing autoserum for 7 minutes in the macular hole were performed. RESULTS: Closure of macular hole was obtained in 15 eyes (80%). The postoperative visual acuity was 0.05 - 0.4. Macular hole failed to heal in 4 eyes. In one eye the remains of prefoveal membrane were removed; in another 3 eyes, in the macular hole scratching at the retinal pigment epithelium (RPE) and placing autoserum were performed and C(3)F(8) tamponade was used. Anatomical cure was obtained in all the 4 eyes. The final visual acuity was 0.1 or better. CONCLUSION: The findings show that removal of prefoveal membrane is imperative. Scratch at RPE with placement of autoserum in the macular hole is effective for the macular hole which has failed to respond to conventional vitrectomy with air tamponade.

Aged↗

PubMed2002

[Photorefractive keratectomy for treatment of ametropia after vitrectomy for retinal reattachment].

OBJECTIVE: To evaluate the efficacy of photorefractive keratectomy (PRK) for the treatment of ametropia after vitrectomy for retinal reattachment. METHODS: PRK was used to treat 11 eyes of ametropia after victrectomy for more than seven months. The visual acuity, retina and corneal endothelial cell densities were investigated in a l2-month follow-up study. RESULT: The postoperative visual acuity of all the 11 eyes was equal to or above the best corrected visual acuity before the operation. Postoperatively, there was no significant change of the corneal endothelial cell densities compared with that before the operation. CONCLUSION: PRK for ametropia after vitrectomy is an effective and safe surgery. But the indication must be selected appropriately.

Adult↗

PubMed2002

[Vitrectomy for severe Coats' disease].

OBJECTIVE: To investigate the outcome of vitreoretinal surgery for severe Coats' disease. METHODS: From December 1995 to December 1999, trans pars plana vitrectomy was performed in 11 patients (11 eyes) diagnosed as Coats' disease. Ten of them were complicated with total retinal detachment, and the other one had tractional retinal detachment caused by epiretinal proliferation. All these patients were followed up from 3 months to 4.5 years. RESULTS: All of the patients obtained useful vision except 1 patient whose operation was given up because of severe shortening of the retina. Three patients had the visual acuity higher than 0.02, and the best vision was 0.2. Obliteration of all abnormal vessels and resorption of all exudate was found postoperatively from 1 month to 3 months. Although the retina had been reattached in 10 patients during the operation, re-detachment was found in 4 patients postoperatively. After therapy all re-detached retina was reattached. The success rate was 90.9%. CONCLUSIONS: Vitrectomy with endolaser or scleral cryotherapy is an ideal therapy for severe Coats' disease, although the visual prognosis is still limited. It can preserve the limited vision, and prevent the severe complications such as rubeosis iridis, glaucoma, and phthisis bulbi.

Adolescent↗

PubMed2001

[Pars plana vitrectomy in treatment of ocular toxocariasis complications--case report].

Ocular toxocariasis in adults may cause serious diagnostic and therapeutic problems. We describe a case of a 54-year-old farmer who developed peripheral granuloma with dense connective tissue strands joined to the disc. The diagnosis was confirmed by high ELISA titers in the serum and vitreous body. We performed pars plana vitrectomy with epiretinal membrane removal and laser photocoagulation of the inferior retina, obtaining improvement of visual acuity. After a few weeks the patient returned with central retinal detachment and macular hole. After the second vitrectomy with use of silicon oil we obtained reattachment of the retina but without functional improvement.

Animals↗

PubMedDate not supplied

Results of vitrectomy in Terson syndrome.

BACKGROUND: To report visual results of vitrectomy in Terson syndrome MATERIALS AND METHODS: In 11 patients, 15 eyes underwent vitreous surgery for Terson syndrome. The mean follow up was 18.3 months. RESULTS: An incomplete posterior vitreous separation was noted in 10 eyes (66.7%). An epiretinal membrane was present in 4 eyes (26.7%), and in 3 eyes, a retinal fold along the arcade was noticed. Significant visual improvement occurred in all eyes; visual acuity of 20/40 or better was achieved in 14 eyes (93.3%). Only 3 eyes developed lens opacity after surgery. CONCLUSION: Vitrectomy in Terson syndrome provides excellent visual recovery. The complication rate, including the development of cataract, is low.

Adult↗