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At least 109 records · Page 6Linked to original sources
PubMedDate not supplied

Transillumination guided cyclocryotherapy in the treatment of secondary glaucoma.

A consecutive series of 38 eyes of 35 glaucoma patients treated with transillumination guided cyclocryotherapy (CCT) either to obtain pain relief or to achieve IOP control was studied at Helsinki University Eye Hospital. Transillumination was used to guide the applications to the correct site. The follow-up range was 1-43 months (mean 9 months). Pretreatment IOP was 39 +/- 13 mm Hg and postoperative 26 +/- 16 mm Hg (mean +/- SD). Twenty-three eyes underwent one and 15 eyes 2-5 procedures. IOP control (IOP 9-23 mm Hg) was achieved in 50%. The response was more favorable in eyes without iris neovascularisation (59% achieved IOP control) than in eyes with neovascular glaucoma (38% achieved IOP control). The best response was achieved in eyes with chronic uveitis (5/7 eyes achieved IOP control). Repeated procedures improved the IOP control rate. Hypotony (IOP < 9 mm Hg) without clinical signs of phthisis occurred in three eyes (8%). Thirteen eyes needed primarily pain relief and 92% achieved it. Postoperatively vision was better in 8%, unchanged in 37% and worse in 55%. Visual acuity was 0.05 or better in nine eyes pretreatment and in eight eyes after treatment.

Adult↗
PubMedDate not supplied

The use of scleral transillumination to localized the extent of a cyclodialysis cleft.

Several techniques have been described to localize and repair cyclodialysis clefts. We describe a technique that may be used to easily and accurately localize a cyclodialysis cleft using scleral transillumination. We have verified the accuracy of this technique using high frequency ultrasound biomicroscopy. The location of the cleft was verified using high frequency ultrasound biomicroscopy. Scleral transillumination may facilitate the accurate location of cyclodialysis and may be a useful adjunct in planning the surgical repair of a cyclodialysis cleft.

Adolescent↗
PubMed1976

Biomicroscopical choroidoscopy (uveoscopy) and transillumination gonioscopy.

A fiber optic sleeve that fits over a Goldmann three-mirror lens, as well as an independent cable used in conjunction with the Goldmann lens, are described for transillumination biomicroscopical examination of the anterior chamber angle and the uvea. High-intensity retroillumination is provided to the anterior and posterior segments of the globe without production of heat to the eye. Present clinical uses as well as possible future research with the instruments are discussed.

Choroid↗
PubMed2004

The transillumination possibility of imidazole-osmium postfixed muscle tissue and its consequences for the handling of muscle tissue samples.

The osmium postfixation of tissue leads to good results for transmission electron microscopy, but also produces completely blackened tissue samples that do not allow the recognition of internal structures. With imidazole-osmium postfixation, one achieves comparable results in high electron microscopic resolution as with routine osmium postfixation. But the tissue samples are not blackened and can, therefore, be transilluminated with point light sources. The new postfixation technique makes it possible to recognize histological details such as vessels, nerve fibers, and the cross-banding pattern in an untrimmed block. This makes it possible to screen-embedded tissue samples for appropriate ultrastructural processing.

Animals↗
PubMedDate not supplied

Determining fluid level in a translucent eye-drop bottle: transillumination by penlight.

We describe an easy way to determine eye-drop contents in translucent bottles. Transillumination of eye-drop bottles from behind or the bottom by using a penlight clearly defines the fluid levels. The described procedure may prevent disposal of eye-drop bottles containing useful amounts of medication and prevent Ophthalmologists and Patients unexpectedly coming across an empty bottle.

Disposable Equipment↗
PubMed1996

Laser transillumination of breast tissue phantoms using time-resolved techniques.

The objective of this study was to evaluate a pulsed laser transillumination technique based on time-resolved detection on breast-tissue-like phantoms. Experiments have been performed on tissue-like plastic phantoms with different scattering characteristics. The effects of time-gate width, size, localisation and refractive index of hidden objects have been scrutinised. Our study showed that the shorter the time-gate the higher the contrast. The contrast is very dependent on the size of the hole, whereas the full width half maximum is not. Furthermore, the investigation showed that the changes of early detected light in an experimental setting is due to scattering, and not to a higher speed of the transmitted light.

Breast↗
PubMed1975

Transillumination of the angular and frontal veins.

A 500-W fiber optics cold light used to transilluminate the angular and frontal veins allowed quick, accurate delineation of the veins for percutaneous orbital venography. It also allowed the surgeon to avoid cutting the angular vein when operating on the lacrimal sac.

Face↗
PubMed1977

Iris transillumination and variable expression in ectopia lentis et pupillae.

Six children in three families showed variations of the rare genetic syndrome, ectopia lentis et pupillae. The siblings in two affected families demonstrated intermingling of simple lens ectopia with ectopia lentis et pupillae, suggesting that some types of simple ectopia lentis represent an incompletely expressed form of the full ectopia lentis et pupillae syndrome. Those patients with simple lens ectopia as well as those with ectopic lenses and pupils had striking transillumination of the iris periphery. Microphakia, cataract, and other anterior segment abnormalities were also observed.

Child↗
PubMed1977

Fiberoptic transillumination: a new tool for the pediatric surgeon.

Transillumination (TI) is a safe and reliable technique for evaluating masses or the presence of free air in the thorax or abdomen. TI can also be of help in the accurate placement of catheters or needles in the chest, abdomen, bladder, or vessels. Its use in several hundred cases has been documented by this report.

Emphysema↗
PubMed1992

Characterization of nuclear pore distribution in freeze-fracture replicas of seminiferous tubules isolated by transillumination.

Transilluminated seminiferous tubules were staged and utilized to determine the distribution of nuclear pore complexes in seminiferous tubules of the rat. Segments of seminiferous tubules of adult albino rats were separated and identified (in stages VII-VIII, IX-XI, XII-XIV, and V-VI), and then processed by freeze-fracture. Type A spermatogonia, the only spermatogonia located in seminiferous segments possessing stages IX-XI and XII-XIV, are oval cells in contact with the basal lamina. They either exhibit a random distribution of nuclear pores or a slight degree of clumping. Type B spermatogonia, found in segments possessing stages V-VI, exhibit, instead, a noticeable pore clustering. The identification of intermediate spermatogonia was not undertaken in this study. Preleptotene spermatocytes are easily identified in freeze-fracture by their location in segments with stages VII-VIII, by their arrangement in numerous groups between the basal lamina and the pachytene spermatocytes, and by their comparatively small size. They exhibit noticeable pore clustering. Leptotene (segments containing stages IX-XI) and zygotene (XII-XIV) spermatocytes show a more homogeneous distribution of nuclear pores. Pachytene spermatocytes are identified by their large size, by consistent detachment from the basal lamina and by being rather numerous and found in all the stages explored. Diplotene spermatocytes have the largest nuclei of all germ cells. They are always detached from the basal lamina and found only in seminiferous segments containing stage XIII. Pachytenes display a regular geometric array of pore aggregation with striking clustering, whereas diplotene nuclear pores takes on a random distribution. Secondary spermatocytes, only present in stage XIV intermingled with metaphase-anaphase profiles, are characterized in replicas by a paucity of evenly distributed nuclear pores.

Animals↗
PubMed1988

New approaches to transillumination imaging.

A review of the current state of transillumination imaging for the detection and diagnosis of breast cancer and the difficulties that impede more widespread acceptance of the methods is presented. An outline is given of the physical models that may be used to describe the propagation and scattering of light in a tissue matrix and how these models might be valuable in identifying imaging improvements. Some of the proposals for future imaging arrangements are described and the preliminary work on a system for light transmission computed tomography is presented.

Breast Neoplasms↗
PubMed2005

Utility of radiology, laser fluorescence, and transillumination.

This article provides readers with an overview of the latest developments in caries detection using radiology, laser fluorescence, and transillumination. Different imaging techniques, methods to assess diagnostic accuracy, and factors affecting the diagnostic accuracy of imaging in film and digital receptors are discussed. In addition, the DIAGNOdent and DIFOTI devices are introduced as possible supplemental techniques for detecting incipient and hidden carious lesions.

Dental Caries↗
PubMed2005

Transilluminated powered phlebectomy: not enough advantages? Review of the literature.

BACKGROUND: Recently, new procedures for the treatment of varicose veins have been developed. The purpose of this review is to analyse the data available concerning the transilluminated powered phlebectomy (TIPP). DESIGN: Review of the English literature. RESULTS: The number of studies is limited. Currently, no trial has proven any significant advantage of TIPP technique when compared with conventional surgery, except for the number of surgical incisions. TIPP procedure seems to be shorter than conventional surgery, particularly for the extensive or recurrent varicose veins. CONCLUSIONS: Several questions regarding TIPP technique remain. Further randomised trials are needed to determine the benefit of this procedure.

Humans↗
PubMed2002

Treating varicose veins with transilluminated powered phlebectomy.

In the past, patients endured hours of surgery, many incisions, and multiple scars to manually remove painful, unsightly, swollen varicose veins. Patients now have a new treatment option. Endoscopic resection and ablation of superficial varicosities is possible using a powered vein resector, irrigated illuminator, and tumescent anesthesia. This article describes this new technique, called transilluminated powered phlebectomy, and explains how the procedure reduces the number of incisions and provides direct visualization of the veins as they are resected.

Adult↗
PubMed1992

Familial total ophthalmoplegia with iris transillumination (a neurocristopathy).

A family with total (internal and external) ophthalmoplegia had associated iris transillumination. No abnormal visual-evoked response brain lateralization indicative of albinism was found. On the basis of avian chimera experiments showing iris muscles to be derived from neural crest cells, we proposed a neurocristopathic theory to explain all clinical findings in this family.

Female↗