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Ocular ultrasound

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https://www.readbyqxmd.com/read/28820764/severe-case-of-renal-coloboma-syndrome-in-long-term-follow-up
#1
Lise Sels, Werner Dirven, Koenraad Devriendt, Anita Leys
PURPOSE: To characterize the ocular features of a severe case of renal coloboma syndrome in a long-term follow-up. METHODS: Observational case report over a period of 45 years. Examination under anesthesia at the age of 3 months, repeated ophthalmologic examination (age 7, 14, 25, 45 years), fluorescein and indocyanine green angiography, electroretinography, ocular ultrasound, optical coherence tomography, computed tomography scan orbits, and magnetic resonance imaging of the brain...
August 17, 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/28820625/multimodal-image-analysis-of-the-retina-in-hunter-syndrome-mucopolysaccharidosis-type-ii-case-report
#2
Isadora Darriba Macedo Salvucci, Simone Finzi, Maria Kiyoko Oyamada, Chong Ae Kim, Sérgio Luis Gianotti Pimentel
INTRODUCTION: We report a case of retinal and posterior ocular findings in a 33-year-old man diagnosed with Hunter syndrome (Mucopolysaccharidosis type II) in a multimodal imaging way. CASE PRESENTATION: Our patient was complaining of blurred night vision for the past 3 years. He had not received any systemic treatment for Hunter syndrome. Vision acuity was 20/20 in both eyes and corneas were clear. Fundus examination revealed bilateral crowded and hyperemic optic nerve heads (elevated in the ocular ultrasound) and areas of subretinal hypopigmentation...
August 18, 2017: Ophthalmic Genetics
https://www.readbyqxmd.com/read/28794614/accuracy-of-b-scan-ultrasonography-in-acute-fundus-obscuring-vitreous-hemorrhage-using-a-standardized-scanning-protocol-and-a-dedicated-ophthalmic-ultrasonographer
#3
Maria T Sandinha, Ajay K Kotagiri, Rona I Owen, Caspar Geenen, David Hw Steel
PURPOSE: To assess the accuracy of B-scan ultrasound (U/S) in diagnosing cases of acute fundus obscuring vitreous hemorrhage (FOVH) using a standardized scan protocol and dedicated ophthalmic ultrasonographer. METHODS: Consecutive patients presenting with acute FOVH of unknown cause, between January 2013 and December 2014, were prospectively recruited. Patients underwent a scan performed by a dedicated ultrasonographer, utilizing a systematic scan sequence and using an ocular specific U/S device...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28777223/ocular-gossypiboma-ultrasound-b-scan-assessment-of-retained-surgical-sponge-after-ahmed-valve-surgery-a-case-report
#4
Kelly Babic, Christine Siguan-Bell, Michael Hee, Shan C Lin
PURPOSE OF THE STUDY: To present the first documented case of an ocular gossypiboma (retained foreign body) of a mitomycin-C-soaked sponge confirmed echographically using diagnostic ultrasound B-scan after Ahmed valve surgery. PATIENTS AND METHODS: A patient who underwent phacoemulsification with Ahmed valve implantation surgery had a retained Weck-Cels sponge soaked with mitomycin-C. With the use of ocular ultrasound B-scan, the retained sponge was localized and a second procedure was performed to explant it...
August 2, 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/28775091/limbal-cyst-following-blunt-trauma-in-an-operated-case-of-congenital-cataract-a-rare-scenario
#5
Amar Pujari, Deepa R Swamy, Harathy Selvan, Rohan Chawla
A 15-year-old male patient with the history of bilateral operated congenital cataract surgery 5 years back now presents with gradual painless diminution of visual acuity in left eye following a blunt trauma with a fist. Ocular examination showed a well-defined slightly bluish-tinged limbal-based conjunctival cyst without any irregularities in the anterior chamber/pupil. Intraocular pressures were 16 mm Hg in the right eye and 10 mm Hg in the left eye; retinal examination showed findings consistent with hypotonic maculopathy...
August 3, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28774512/impact-of-lens-densitometry-on-phacoemulsification-parameters-and-usage-of-ultrasound-energy-in-femtosecond-laser-assisted-lens-surgery
#6
Ghada Al-Khateeb, Mehdi Shajari, Krishnapoojita Vunnava, Kerstin Petermann, Thomas Kohnen
OBJECTIVE: The aim of this study was to find the correlation between lens densitometry measurements using Pentacam Scheimpflug imaging system with equivalent average ultrasound power and cumulative dissipated energy (CDE) in femtosecond laser-assisted lens surgery (FLALS). METHODS: One hundred and twenty-four eyes were analyzed retrospectively, of which 109 had undergone cataract surgery and 15 had received refractive lens exchange with FLALS. Using the Pentacam Nucleus Staging (PNS) lens densitometry program, preoperative mean lens density and cataract grading score were evaluated...
August 2017: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
https://www.readbyqxmd.com/read/28772005/the-effects-of-antioxidants-on-ocular-blood-flow-in-patients-with-glaucoma
#7
Alon Harris, Josh Gross, Nicholas Moore, Thai Do, Amelia Huang, Willy Gama, Brent Siesky
PURPOSE: To investigate the effects of an antioxidant dietary supplement that includes Ginkgo biloba, on retinal and retrobulbar blood flow in patients with open-angle glaucoma (OAG). METHODS: Forty-five patients with confirmed OAG were enroled in a randomized, double blinded, placebo-controlled cross-over study. Baseline and postadministration measurements of intraocular pressure (IOP), ocular perfusion pressure (OPP), retrobulbar blood flow, and retinal capillary blood flow were non-invasively measured (ultrasound and laser Doppler modalities, respectively) before and one month after antioxidant nutraceuticals and placebo administration...
August 3, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/28761994/the-effect-of-bariatric-surgery-on-the-retrobulbar-flow-hemodynamic-parameters-in-patients-with-obesity-color-doppler-evaluation
#8
Bülent Çekiç, Berna Doğan, Iclal Erdem Toslak, Uğur Doğan, Semih Sağlık, Muhammed Kazım Erol
PURPOSE: To evaluate the effect of weight loss on the retrobulbar hemodynamics in patients who had undergone bariatric surgery for obesity using color Doppler ultrasound (CDU) and to evaluate correlations with intraocular pressure (IOP) changes measured using Goldman applanation tonometry. METHODS: Thirty-two patients were included in this prospective study. Body mass index (BMI), IOP measurements, and retrobulbar CDU examination were performed on all individuals 6 months before and after bariatric surgery...
July 31, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28723938/gender-differences-in-cerebral-metabolism-for-color-processing-in-mice-a-pet-mri-study
#9
Philip C Njemanze, Mathias Kranz, Mario Amend, Jens Hauser, Hans Wehrl, Peter Brust
INTRODUCTION: Color processing is a central component of mammalian vision. Gender-related differences of color processing revealed by non-invasive functional transcranial Doppler ultrasound suggested right hemisphere pattern for blue/yellow chromatic opponency by men, and a left hemisphere pattern by women. MATERIALS AND METHODS: The present study measured the accumulation of [18F]fluorodeoxyglucose ([18F]FDG) in mouse brain using small animal positron emission tomography and magnetic resonance imaging (PET/MRI) with statistical parametric mapping (SPM) during light stimulation with blue and yellow filters compared to darkness condition...
2017: PloS One
https://www.readbyqxmd.com/read/28723783/novel-surgical-management-of-cyclodialysis-cleft-via-anterior-chamber-perfusion-case-report
#10
Jinfei Tang, Ergang Du, Jie Wang
RATIONALE: Cyclodialysis cleft is a relatively rare but severe condition with persistent ocular hypotony, which can cause morphologic changes and visual loss. Here we report a case of a traumatic cyclodialysis cleft that was successfully managed with direct cyclopexy via anterior chamber perfusion. During the operation, if there is aqueous humor flowing out of the deep scleral incision, the cleft is not closed, and surgery should continue until there is no aqueous outflow. PATIENT CONCERNS: A 66-year-old man was treated for severe blunt ocular trauma of the left eye and a resultant cyclodialysis cleft, lens subluxation, choroidal detachment and a cataract...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28676726/-traumatic-cyclodialysis-treated-with-cryopexy
#11
P Plaza Ramos, H Heras Mulero, J I Molinuevo Ruiz de Zárate, C Abascal Azanza
yclodialysis is the result of the separation of the longitudinal fibres of the ciliary muscle from their scleral insertion, creating states of ocular hypotony. It is mainly caused by traumatisms. Gonioscopy has traditionally been the diagnostic test for this entity, however, at present it is being replaced by other techniques, such as ultrasound biomicroscopy (UBM). We present the case of a 57-year-old male who, following a traumatism in the left eye caused by the disc of a radial saw, presented corneal perforation and vitreous haemorrhage with pan-retinal edema...
June 30, 2017: Anales del Sistema Sanitario de Navarra
https://www.readbyqxmd.com/read/28675987/material-properties-of-human-ocular-tissue-at-7-%C3%A2%C2%B5m-resolution
#12
Daniel Rohrbach, Kazuyo Ito, Harriet O Lloyd, Ronald H Silverman, Kenji Yoshida, Tadashi Yamaguchi, Jonathan Mamou
Quantitative assessment of the material properties of ocular tissues can provide valuable information for investigating several ophthalmic diseases. Quantitative acoustic microscopy (QAM) offers a means of obtaining such information, but few QAM investigations have been conducted on human ocular tissue. We imaged the optic nerve (ON) and iridocorneal angle in 12-µm deparaffinized sections of the human eye using a custom-built acoustic microscope with a 250-MHz transducer (7-µm lateral resolution). The two-dimensional QAM maps of ultrasound attenuation (α), speed of sound ( c), acoustic impedance ( Z), bulk modulus ( K), and mass density (ρ) were generated...
July 1, 2017: Ultrasonic Imaging
https://www.readbyqxmd.com/read/28665442/a-case-of-endophthalmitis-after-bilateral-medial-rectus-recession
#13
Sagar B Patel, Nikitha Reddy, Robert N Hogan, Jennifer H Cao
A 9-month-old male infant with a history of Down syndrome underwent bilateral medial rectus recession. Two weeks postoperatively, he developed leukocoria of the left eye with a white opacity posterior to the lens, numerous undulations, necrosis, and hemorrhages in the retrolental space. His contralateral eye had white retinal lesions nasally. Ultrasound examination of the left eye showed a funnel retinal detachment, loculated debris, and a small, central, hyperechoic area concerning for calcification. He underwent enucleation because retinoblastoma could not be definitively ruled out...
June 29, 2017: Journal of Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/28637781/detecting-optic-nerve-head-swelling-on-ultrasound-and-optical-coherence-tomography-in-children-and-young-people-an-observational-study
#14
Annegret Hella Dahlmann-Noor, Gillian W Adams, Moritz Claudius Daniel, Alison Davis, Joanne Hancox, Melanie Hingorani, Patricia Ibanez, Becky McPhee, Himanshu Patel, Marie Restori, Clare Roberts, Maria Theodorou, James Acheson
BACKGROUND: Following high-profile cases, referrals for evaluation of 'suspicious optic discs' to eye clinics in the UK have sharply increased, asking ophthalmologists to reliably distinguish between true and pseudopapilloedema. Optic nerve sheath dilatation (ONSD) on ocular ultrasound (US) is considered a reliable sign of true papilloedema, but this test is not widely available. Recently, anterior bowing of Bruch's membrane (BM) and increased retinal nerve fibre layer thickness on optical coherence tomography (OCT) have emerged as indicators of intracranial hypertension, and OCT is widely available...
June 21, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28618301/noninvasive-measurement-of-wave-speed-of-porcine-cornea-in-ex-vivo-porcine-eyes-for-various-intraocular-pressures
#15
Boran Zhou, Arthur J Sit, Xiaoming Zhang
The objective of this study was to extend an ultrasound surface wave elastography (USWE) technique for noninvasive measurement of ocular tissue elastic properties. In particular, we aim to establish the relationship between the wave speed of cornea and the intraocular pressure (IOP). Normal ranges of IOP are between 12 and 22mmHg. Ex vivo porcine eye balls were used in this research. The porcine eye ball was supported by the gelatin phantom in a testing container. Some water was pour into the container for the ultrasound measurement...
November 2017: Ultrasonics
https://www.readbyqxmd.com/read/28611153/effects-of-short-term-mild-hypercapnia-during-head-down-tilt-on-intracranial-pressure-and-ocular-structures-in-healthy-human-subjects
#16
Steven S Laurie, Gianmarco Vizzeri, Giovanni Taibbi, Connor R Ferguson, Xiao Hu, Stuart M C Lee, Robert Ploutz-Snyder, Scott M Smith, Sara R Zwart, Michael B Stenger
Many astronauts experience ocular structural and functional changes during long-duration spaceflight, including choroidal folds, optic disc edema, globe flattening, optic nerve sheath diameter (ONSD) distension, retinal nerve fiber layer thickening, and decreased visual acuity. The leading hypothesis suggests that weightlessness-induced cephalad fluid shifts increase intracranial pressure (ICP), which contributes to the ocular structural changes, but elevated ambient CO2 levels on the International Space Station may also be a factor...
June 2017: Physiological Reports
https://www.readbyqxmd.com/read/28602870/ultrasound-mediated-nanoparticle-delivery-across-ex-vivo-bovine-retina-after-intravitreal-injection
#17
Di Huang, Ying-Shan Chen, Ilva D Rupenthal
Intravitreal injection is the most common administration route for the treatment of retinal diseases. However, the vitreous and some of the retinal layers themselves act as significant barriers to efficient delivery of drugs administered intravitreally. This study aimed to improve the diffusive mobility of nanoparticles (NPs) in the vitreous and enhance their permeation across the retina after intravitreal injection by application of ultrasound (US). Ex vivo posterior bovine eye cups were used and the vitreous was either left intact or removed gently from the neural retina...
June 8, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/28594303/self-inflicted-enucleations-clinical-features-of-seven-cases
#18
Mamta Shah, Lucy Sun, Solly Elmann, Ivan Vrcek, Ronald Mancini, Hee Joon Kim, Jacqueline Carrasco, Roman Shinder
We report the clinical presentation, radiography, and management outcomes of autoenucleations (AE). Charts of 7 patients evaluated at 4 institutions with AE were reviewed. Four males and three females had a mean age of 50 years (range 26-72 years). The etiologies were psychosis secondary to underlying mental illness (6, 88%) and substance use (1, 12%), and the mechanism was largely blunt digital injury (6, 88%). Three (43%) AE patients suffered bilateral enucleations. Common concomitant injuries included eyelid lacerations (5, 71%) and optic nerve avulsion (3, 43%)...
June 2017: Orbit
https://www.readbyqxmd.com/read/28583322/ocular-findings-in-patients-with-cholestatic-disorders-of-infancy-a-single-centre-experience
#19
Hanaa El-Karaksy, Dalia Hamed, Hanan Fouad, Engy Mogahed, Heba Helmy, Fotouh Hasanain
BACKGROUND AND STUDY AIMS: Neonatal cholestasis can be associated with ocular findings that might aid in its diagnosis, e.g., Alagille syndrome (AGS) and Niemann Pick disease (NPD). We aimed to investigate the frequency of ocular manifestations in infants with cholestasis. PATIENTS AND METHODS: This cross-sectional study included cholestatic infants presenting to the Paediatric Hepatology Unit, Cairo University Paediatric Hospital, Cairo, Egypt. All infants underwent examination of lid, ocular motility, anterior and posterior segments and measurement of intraocular pressure, cycloplegic refraction, ocular ultrasonography and vision...
June 2, 2017: Arab Journal of Gastroenterology: the Official Publication of the Pan-Arab Association of Gastroenterology
https://www.readbyqxmd.com/read/28572063/pattern-of-local-recurrence-after-i-125-episcleral-brachytherapy-for-uveal-melanoma-in-a-spanish-referral-ocular-oncology-unit
#20
Sara Sánchez-Tabernero, Ciro García-Alvarez, Ma Fe Muñoz-Moreno, Patricia Diezhandino, Pilar Alonso-Martínez, Jesus M de Frutos-Baraja, Francisco López-Lara, Maria A Saornil
PURPOSE: To describe the time, frequency, and clinical characteristics of treatment failure after I-125 brachytherapy in patients with uveal melanoma treated and followed in a Spanish referral ocular oncology unit. DESIGN: Prospective, consecutive, interventional case series. METHODS: Patients diagnosed with uveal melanoma from 1995 to 2016 and treated with episcleral brachytherapy were included. Demographic data collection, ophthalmic evaluation, ultrasound scan, and systemic studies were performed at baseline, every 6 months thereafter for 5 years, and subsequently at annual intervals...
August 2017: American Journal of Ophthalmology
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