UBM-guided chamber angle surgery for glaucoma management: an experimental study

Dietlein, Thomas S.; Engels, Bert F; Jacobi, Philipp C.; Krieglstein, G K

doi:10.1038/sj.eye.6700328

Cited by 33 publications

(6 citation statements)

References 28 publications

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“…54 Experimental study on UBM-guided chamber angle surgery was done by Dietlein TS et al 55 Mechanical goniopuncture or punctual Er:YAG laser trabecular ablation was performed without operating microscope or gonioscopy, but with real-life ultrasound biomicroscopy monitoring with a 50 MHz transducer. It was observed that the instruments could be clearly visualized within the chamber angle and disturbing artifacts were only minimal when using mechanically fixed instruments in slow motion.…”

Section: Other Surgeriesmentioning

confidence: 99%

Ultrasound Biomicroscopy in Glaucoma: An Update

Dada¹,

Gaurav²,

Mishra³

2008

JOCGP

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UBM is a high-frequency ultrasound technology that provides exceptionally detailed two-dimensional gray-scale images of the various anterior segment structures and evaluates them both quantitatively and qualitatively. It allows noninvasive in vivo imaging of structural details of the anterior ocular segment at near microscopic resolution and thus, there are many other applications of this new imaging method.This review outlines the uses of UBM in diagnosis and management of glaucoma.

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Section: Other Surgeriesmentioning

confidence: 99%

Ultrasound Biomicroscopy in Glaucoma: An Update

Dada¹,

Gaurav²,

Mishra³

2008

JOCGP

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“…74 UBM may also potentially offer intraoperative guidance in the anterior segment as a supplement to gonioscopy and intraocular microendoscopy. 75 Postpenetrating keratoplasty glaucoma is a major cause of graft failure and one of the most common causes of irreversible visual loss after keratoplasty. UBM allows imaging of anterior-segment anatomy in the presence of corneal opacity.…”

Section: Angle Recessionmentioning

confidence: 99%

Anterior Segment Imaging in Glaucoma

Salim

Dorairaj

2013

Seminars in Ophthalmology

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Anterior segment imaging allows objective assessment of the anterior segment of the eye, particularly the anterior chamber angle. Both qualitative and quantitative analyses are possible and aid in detecting and managing closed-angle and open-angle mechanisms in various forms of glaucoma. This review focuses primarily on anterior segment optical coherence tomography and ultrasound biomicroscopy, with emphasis on principles of technology, commercially available devices, and clinical applications in glaucoma with potential advantages and disadvantages of each technology.

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“…Carillo demonstrated the usefulness of UBM to diagnose obstruction of an Ahmed valve by the iris [69]. UBM may also potentially offer intraoperative guidance in the anterior segment as a supplement to gonioscopy and intraocular microendoscopy [70]. …”

Section: Clinical Application Of Ubm and As-oct For Glaucoma Diagnosis mentioning

confidence: 99%

Anterior-segment imaging for assessment of glaucoma

Ursea¹,

Silverman²

2010

Expert Review of Ophthalmology

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This article summarizes the physics, technology and clinical application of ultrasound biomicroscopy (UBM) and optical coherence tomography (OCT) for assessment of the anterior segment in glaucoma. UBM systems use frequencies ranging from approximately 35 to 80 MHz, as compared with typical 10-MHz systems used for general-purpose ophthalmic imaging. OCT systems use lowcoherence, near-infrared light to provide detailed images of anterior segment structures at resolutions exceeding that of UBM. Both technologies allow visualization of the iridocorneal angle and, thus, can contribute to the diagnosis and management of glaucoma. OCT systems are advantageous, being noncontact proceedures and providing finer resolution than UBM, but UBM systems are superior for the visualization of retroiridal structures, including the ciliary body, posterior chamber and zonules, which can provide crucial diagnostic information for the assessment of glaucoma. †Author Glaucoma is a disease that is essentially an optic neuropathy. Great strides have been made in the last decade in imaging the retinal nerve fiber layer and the optic nerve using optical coherence tomography (OCT). OCT is a noninvasive technique allowing the visualization and measurement of these structures for the assessment of glaucoma progression [1][2][3][4][5]. While damage to the optic and retinal nerves is responsible for the degradation of vision, in most instances this damage is associated with elevated intraocular pressure (IOP). Elevation of IOP results from an imbalance between the production and drainage of aqueous fluid, specifically, increased outflow resistance. Thus, assessment of the anterior segment plays a major role in the diagnosis and treatment of glaucoma.The traditional tools for the assessment of the angle and anterior segment are the slit-lamp and gonioscopy, in combination with a Goldmann contact lens and classification using the system introduced by Shaffer [6]. Several newer technologies now exist for imaging of the anterior segment, including scanning Scheimpflug (e.g., Pentacam, Oculus, Inc., Lynnwood, WA, USA), and scanning slit-lamp systems (e.g., Orbscan, Orbtek Inc., Salt Lake City, UT, USA). The Pentacam can provide rapid and reproducible measurements of anterior chamber depth and angle width [7], but is limited to visualization of only the angle approach. Scheimpflug photography also does not display the retroiridal structures or the ciliary body, which are of great interest in glaucoma diagnosis [8]. The scanning peripheral anterior chamber depth analyzer is another optically based system. It has high reproducibility in screening for narrow angles, as with other systems using visible light, but may have difficulty in assessing the bottom of the angle, as can be accomplished by OCT and ultrasound biomicroscopy (UBM) [9]. While these visible light systems are undoubtedly useful, especially for screening for narrow angles, OCT (based on near-infrared light) and UBM systems allow imaging of the full-angle anatomy and, in the cas...

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UBM-guided chamber angle surgery for glaucoma management: an experimental study

Cited by 33 publications

References 28 publications

Ultrasound Biomicroscopy in Glaucoma: An Update

Ultrasound Biomicroscopy in Glaucoma: An Update

Anterior Segment Imaging in Glaucoma

Anterior-segment imaging for assessment of glaucoma

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