PubMed Health⌕ Search

Biomedical subjects

W S Tasman

Publications and source records attributed to W S Tasman.

At least 19 recordsLinked to original sources
PubMed1992

Reoperation following diabetic vitrectomy.

A review of 484 consecutive eyes that were undergoing an initial pars plana vitrectomy for the sequelae of proliferative diabetic retinopathy disclosed that 41 eyes (8.5%) required one or more additional vitrectomy operations. The primary causes for reoperation included rhegmatogenous retinal detachment in 18 (44%) of the 41 eyes, recurrent vitreous hemorrhage in 21 eyes (51%), and glaucoma in two eyes (5%). The visual prognosis was worse in the group with rhegmatogenous retinal detachment, with 10 (56%) of 18 eyes progressing to no light perception (P = .003). Severe preretinal and subretinal fibrous proliferation, as demonstrated histopathologically, accounted in large part for the poor result. The preretinal membrane formation appeared to occur secondary to a combination of diabetic extraretinal vascular growth and proliferative vitreoretinopathy. Among the total group of 41 eyes that required subsequent surgery, the retina eventually remained detached in 18 eyes (44%), and phthisis bulbi occurred in 13 eyes (32%). Rubeosis iridis developed in 17 (94%) of 18 eyes in which the retina remained detached.

Adult↗
PubMed1991

Management of late-onset angle-closure glaucoma associated with retinopathy of prematurity.

Late-onset angle-closure glaucoma secondary to retinopathy of prematurity (ROP) occurred in ten eyes of ten patients. The age at presentation ranged from 12 to 45 years (mean, 32 years). Eight eyes had nonneovascular mechanisms for the angle closure while two had neovascular angle closure. Treatment of eyes with this form of secondary angle closure included medical management alone, peripheral iridectomy, trabeculectomy, lensectomy, alloplastic tube shunt implantation, and cilioablative procedures. Three eyes required more than one of these treatments. The choice of therapy was based on the initial intraocular pressure and vision, degree of lens opacity and intumescence, presence of anterior segment neovascularization, and the gonioscopic appearance of the anterior chamber angle. The clinical features of this condition are described and a proposed mechanism and therapeutic approach are presented.

Adolescent↗
PubMed1991

Inadvertent globe perforation during retrobulbar and peribulbar anesthesia. Patient characteristics, surgical management, and visual outcome.

The authors report a series of 20 eyes from 20 patients in whom inadvertent perforation of the globe occurred during local anesthesia for ocular surgery. Perforation resulted from retrobulbar anesthesia in 18 eyes and from peribulbar anesthesia in 2 eyes. Nine (45%) of 20 eyes had an axial length greater than or equal to 26.00 mm. Combining this figure with axial length data for the general population and estimates for the risk of globe perforation during local anesthesia yields an approximate incidence of perforation in eyes with axial length greater than or equal to 26.00 mm of 1 in 140 injections. Proliferative vitreoretinopathy (PVR) developed in 8 of the 20 eyes (40%) in this series. Overall, 15 (75%) of the 20 eyes were successfully repaired, and, in five eyes (25%), the final visual acuity was 20/70 or better.

Adult↗
PubMed1991

Proliferative retinopathy: absence of white matter lesions at MR imaging.

One form of retinopathy associated with diabetes is a proliferative small vessel process thought to be mediated by biochemical, hemodynamic, and endocrinologic factors. The authors conducted a prospective study to determine whether patients with diabetes who had proliferative retinopathy had evidence of intracranial microangiopathy visible at magnetic resonance (MR) imaging. Twenty-five patients under 40 years of age with proliferative retinopathy and insulin-dependent diabetes mellitus and 10 age-matched control subjects were studied with MR imaging. Axial images were reviewed by two neuroradiologists for the presence of white matter foci of high signal intensity. No patients demonstrated evidence of these foci. There was no evidence of ischemic foci in any of the patients (all patients were neurologically asymptomatic). The vasculopathy associated with proliferative retinopathy does not appear to affect the intracranial circulation to the extent detectable with MR imaging. The presence of white matter foci of high signal intensity or ischemic changes in the brains of insulin-dependent diabetic patients under 40 years of age should not be attributed to diabetic vasculopathy. Other causes should be considered.

Adolescent↗
PubMed1990

Systemic complications associated with retinal cryoablation for retinopathy of prematurity.

Eighty infants with proliferative retinopathy of prematurity (ROP) were treated with peripheral retinal cryoablation. Among the serious systemic complications encountered were three instances of respiratory arrest and one of cardiorespiratory arrest. Recommendations that may help prevent these adverse systemic effects in premature infants include: (1) avoidance of excess subconjunctival anesthetic doses, (2) preoperative administration of systemic atropine to minimize the oculocardiac reflex, (3) consideration of an analgesic agent to decrease the pain and exhaustion, and (4) cardiorespiratory monitoring in a hospital setting, with an intravenous line in place, at the time of treatment.

Anesthetics↗
PubMed1990

Re-operation following pars plana vitrectomy for the sequelae of proliferative diabetic retinopathy.

A review of 306 eyes undergoing pars plana vitrectomy for the complications of proliferative diabetic retinopathy revealed that 26 (8.5%) required a second vitrectomy operation. Among the eyes that required repeat vitrectomy, the eventual visual acuity ranged from 20/20 to 20/400 in 35% and was no light perception in 31%. Reasons for subsequent surgery included recurrent vitreous hemorrhage in 54% of eyes, retinal detachment in 42% and neovascular glaucoma in 4%. Twelve eyes (46%) remained with a permanent retinal detachment despite attempts at surgical repair, and eleven of these twelve eyes subsequently developed rubeosis iridis.

Adult↗
PubMed1986

Proliferative sickle retinopathy and neovascularization of the disc: regression following treatment with peripheral retinal scatter laser photocoagulation.

Proliferative sickle retinopathy (PSR) is usually described as a peripheral neovascular tuft in a "sea fan" like configuration. While neovascularization of the disc (NVD) is a common finding in proliferative diabetic retinopathy (PDR), to our knowledge only one other case has been reported of NVD in an S-C patient in the absence of other contributing conditions. PSR has been shown to regress after treating hypoxic peripheral retina with peripheral circumferential retinal scatter photocoagulation (PCRSP). The following is a case report of an S-C patient with PSR and NVD/NVR which was originally treated elsewhere with scatter argon laser photocoagulation from the vascular arcades to just behind the equator. The peripheral "sea fan" and NVD did not regress. PCRSP to the zone of peripheral ischemia was then performed, and regression of the NVD and peripheral "sea fan" was achieved. This case illustrates the importance of concentrating laser treatment to the zones of retinal ischemia to achieve regression of associated neovascularization.

Anemia, Sickle Cell↗
PubMed1985

BB-gun injuries to the eye.

Thirteen patients with BB-gun injuries to the eye are reported. Included are nine instances of double perforation, one case of vitreous hemorrhage, a case of late rhegmatogenous retinal detachment, one of retinitis sclopetaria, and a case of an intraocular shell casing introduced indirectly via an inadvertant BB-gun discharge into a drawer of bullets. Among the nine globes with double perforation, seven eyes were irreparably damaged and eventually enucleated, while two remained with hand motions vision. Despite modern vitrectomy techniques, double perforating BB-gun injuries to the globe imply a grim prognosis.

Adolescent↗
PubMed1979

An alternative method of gas-fluid exchange through the limbus in giant tears and other complicated retinal detachments.

An alternative method of gas-fluid exchange through the limbus in patients with giant tears and complicated retinal detachments is presented. The indications for the combined surgery of scleral buckle, vitrectomy, and gas-fluid exchange are suggested. The results of this type of surgery in 5 patients with giatn retinal tears, and in 12 patients with complicated retinal detachments, are reported. Most failures were caused by massive periretinal proliferation.

Air↗
PubMed1978

Vitrectomy and Wagner's vitreoretinal degeneration.

A 14-year-old boy, an 11-year-old girl, and a 3-year-old girl with Wagner's vitreoretinal degeneration had multiple retinal detachments. Surgical repair by means of conventional scleral buckling and encircling techniques was unsuccessful. However, after vitrectomy, their retinas remained flat.

Adolescent↗
PubMed1978

Rhegmatogenous retinal detachments in blacks.

Primary rhegmatogenous retinal detachment is probably much less common in blacks than whites. We reviewed 100 consecutive black patients with retinal detachment who were seen over a 3 year period, and compared them to a randomly selected group of 100 whites seen during the same period. Trauma was the most common cause of detachment in blacks (52%), but was a relatively uncommon cause in whites (12%). Posterior vitreous detachment was the most frequent etiology of detachment in whites (47%), but was rare in blacks (15%). Aphakia was the second most common etiology in whites (30%), while it was relatively uncommon in blacks (13%). Myopia and/or lattice was a more frequent associated finding in blacks with detachment (19%), than in whites (9%). These findings are discussed and the literature reviewed.

Adolescent↗
PubMed1976

Juvenile retinal detachment.

We feel that the management of juvenile retinal detachment can best be improved by earlier diagnosis. School vision-screening tests should be encouraged, and long-term followup of patients with high myopia, aphakia, and retrolental fibroplasia should be practiced. The peripheral retina should be examined in all traumatized eyes since delayed detachment is the rule. When retinal breaks are found in high-risk eyes, in our opinion, prophylactic treatment is indicated.

Adolescent↗