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Biomedical subjects

I Boniuk

Publications and source records attributed to I Boniuk.

36 records · Page 2Linked to original sources
PubMed1984

Xenon arc photocoagulation of proliferative diabetic retinopathy. A review of 2688 consecutive eyes in the format of the Diabetic Retinopathy Study.

In a retrospective study, 2688 eyes treated with xenon arc photocoagulation which would have qualified for inclusion in the Diabetic Retinopathy Study (DRS) were reviewed in the format of the DRS. When comparable risk groups were compared, the results of treatment were even more favorable than reported in the DRS without the severe complications attributed to xenon treatment in the DRS. A critical analysis of the DRS gives clues for the greater amount of visual loss found with xenon than argon in the DRS. Since these complications may be avoidable in some cases, and since xenon has been shown to be at least as effective as argon, it should continue to be used in the treatment of proliferative diabetic retinopathy.

Argon↗
PubMed1983

Xenon arc photocoagulation of proliferative diabetic retinopathy (a review of 2688 consecutive eyes in the format of the diabetic retinopathy study--DRS).

Over 2500 xenon arc-treated eyes which would have qualified for inclusion in the DRS were reviewed in the format of the DRS. When comparable risk groups were compared, the results of treatment were even more favorable than reported in the DRS without the severe complications attributed to xenon treatment in the DRS. A critical analysis of the DRS gives clues for the greater amount of visual loss found with xenon than argon in the DRS. Since these complications may be avoidable in some cases and since xenon has been shown to be at least as effective as argon, it should continue to be used in the treatment of PDR.

Argon↗
PubMed1979

Bupivacaine anesthesia in retinal detachment surgery.

Retinal detachment surgery and other long-duration ocular procedures can be performed safely with local anesthesia, but a long-acting anesthetic is required. A randomized and masked prospective series of 126 scleral buckling procedures was undertaken to test a mixture of bupivacaine (Marcaine), lidocaine (Xylocaine), and epinephrine against lidocaine and epinephrine. The data collected show a conclusive superiority of the bupivacaine mixture in longevity of action and overall performance. Also, there was significantly less variability in the quality of anesthesia with the mixture than with lidocaine (p = .0015).

Anesthesia, Local↗
PubMed1978

Grand mal seizures after retrobulbar block.

Convulsions developed in two patients after retrobulbar block. The amount of local anesthetic agent that was used was considerably less than the intravenous toxic dose in both cases. No retrobulbar hemorrhage resulted. The probable cause of seizures was inadvertent injection of local anesthetic directly to the CNS via the ophthalmic artery or its sheath.

Aged↗
PubMed1977

Pseudophakic retinal detachment.

Our experiences with a small group of patients who had intraocular lens implants performed at the time of cataract extraction, and who subsequently developed retinal detachment are reviewed. The technical problems related to retinal detachment surgery in the presence of intraocular lenses and the results of this surgery are summarized.

Adult↗
PubMed1975

Early photocoagulation treatment of active histoplasmic maculopathy.

Photocoagulation has proved to be an effective means of treating active presumed histoplasmic maculopathy. Xenon arc and argon laser light sources have proved equally effective when moderately intense, confluent burns are produced, and both are ineffective when mild lesions are produced. The membrane must be destroyed for the treatment to be effective; and, of course, the fovea must be preserved. In treating neovascular nets that are very close to the fovea, the argon laser offers the advantage of being capable of producing a sharper zone of delineation than the xenon arc (Fig. 6). When moderate amounts of subretinal fluid or hemoglobin overlie the neovascular membrane, it is very difficult to achieve the required degree of coagulation. Under these circumstances, it is best first to try to reduce the height of the sensory retinal detachment by means of systemic steroid treatment. If this is not successful, xenon photocoagulation has produced better coagulation effects than the argon laser. Analysis of our data indicates that resultant visual acuity can be correlated with pretreatment visual acuity (Fig. 5), with best results achieved before visual acuity deteriorates beyond the 20/40 level. The closer the edge of the neovascular membrane is to the fovea, the more risky it is to treat. However, these lesions are also those most apt to destroy central vision if left alone. It is encouraging to note that in only 3 of the 16 lesions in which the foveal edge was within 1 degree of the fovea did the visual acuity deteriorate to the 20/200 level, compared to 50 percent deterioration reported in the natural history of this disease [3].

Argon↗
PubMed1975

Drainage of subretinal fluid: why, when, where and how.

The release of subretinal fluid is only required in certain complicated types of retinal detachment and should be avoided when possible. An important consideration in releasing subretinal fluid is the timing of this step in relation to the application of diathermy or cryotherapy as the primary treatment modality. Drainage should precede application of cryotherapy but follow the use of diathermy. The most satisfactory site for drainage is either immediately above or below the medial or lateral long ciliary nerve, just posterior to the equator of the globe. A technique for drainage of subretinal fluid has been developed and evaluated. An 'L'-shaped scleral flap is dissected to produce a relatively staphylomatous zone and the choroid is perforated near its center.

Choroid↗