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Biomedical subjects

H Zauberman

Publications and source records attributed to H Zauberman.

At least 55 records · Page 3Linked to original sources
PubMed1977

Fluorescein pupillary flow in aphakics with intact and spontaneous openings of the vitreous face.

The passage of fluorescein dye, injected into the general circulation, from the posterior to the anterior chamber was studied in 60 selected aphakic eyes between 2 days and 4 weeks after an uneventful cataract extraction. In a group of 22 eyes with intact anterior hyaloid, fluorescein was seen to pass only through the pupillary margin, mostly within 20 seconds of the beginning of the eye injection. In 24 eyes with rents in the anterior hyaloid the dye was seen percolating only through the vitreous face openings. No fluorescein passed through the pupillary margin or the peripheral iridectomy in this group of eyes. The appearance time of the dye was delayed to about twice the normal appearance time. In 8 eyes with rents in the anterior hyaloid the dye passed only through the pupillary margin. In 4 eyes with anterior vitreous rents the fluorescein appeared through the anterior vitreous face opening. From the analysis of the data it appears that the spontaneous breaks in the anterior vitreous face may represent a 'self-c,re' of pupillary and iridectomy block by the vitreous in aphakics in a high proportion of cases. It is our impression that 3 peripheral iridectomies and a very tight closure of the wound can prevent the complication of spontaneous breaks of the vitreous face.

Cataract Extraction↗
PubMed1976

Argon laser application to the angle structures in the glaucomas.

The argon laser beams' effect on angle structures was studied in 20 uncontrolled glaucomatous eyes. Nineteen eyes became hypotensive quickly, but in 15, the elevated tension returned during the 20 to 40 day follow-up period. Four eyes sustained low pressures throughout the ten-month follow-up period. Two were of babies with congenital glaucoma, one had simple glaucoma following an unsuccessful filtering operation, and one was aphakic following congenital cataract extraction. Ten eyes were medically controlled postoperatively, and six were failures that had to undergo further surgery. Outflow facility measurements revealed an increase in C values during the hypotensive period. The C values were reduced later, with the decrease corresponding to the increase in intraocular pressures. The hypotensive effect together with the increase in outflow facility was probably related to laser-induced openings in the angle structures. The varying results at the later stages depended on whether or not these openings remained opened, or became partially or completely closed during healing.

Adolescent↗
PubMed1976

Experimental cleavage of chorioretinal scars by traction and subretinal fluid.

The resistance to separation by localized traction and exudative retinal detachment of experimental chorioretinal scars produced with argon laser photocoagulation, cryothermy and diathermy was tested in rabbits. In vivo, the area of retinal separation over the scar was similar to that obtained by traction on normal retina. Moreover, the retinal cleavage occurred at the level of the scar regardless of the scar inducing modality, indicating that the scar is the weakest point in the retina-pigment epithelium joint. However, spaced and dense chorioretinal scars produced by argon laser photocoagulation, diathermy and cryothermy usually remained attached after experimental production of exudative retinal detachments with penicillin G intravitreal injections. This study indicates that the resistance to detachment of the normal retina by traction may be as strong as that of the scarred tissue and that the chorioretinal scars' effect is related to lesser fluid penetration into the treated area.

Animals↗
PubMed1975

Identification of copper ions in aqueous and vitreous of eyes containing copper and iron foreign bodies.

The reliability of aqueous analysis by the atomic absorption spectrophotometer for copper ion content in samples from eyes containing intravitreal pure copper particles was investigated. It was demonstrated that values of copper ions rose well above the normal in the aqueous as well as in the vitreous of such eyes. The standard deviations of the mean values were generally high. It was also found that a similar copper ion content increase occurred in eyes containing iron particles. The possible clinical implications of these findings are discussed.

Animals↗