Navegando por Palavras-chave "ultrasound biomicroscopy"
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- ItemSomente MetadadadosFindings in the anterior segment on ultrasound biomicroscopy in Maroteaux-Lamy syndrome(Lippincott Williams & Wilkins, 2001-04-01) Casanova, FHC; Adan, CBD; Allemann, N.; Freitas, D. de; Universidade Federal de São Paulo (UNIFESP)Purpose. Maroteaux-Lamy syndrome is one of the mucopolysaccharidoses caused by enzyme deficiency (arylsulfatase B) that leads to incomplete degradation and storage of dermatan sulfate. We report a case of mucopolysaccharidosis type VI (MPS VI; Maroteaux-Lamy syndrome) with corneal involvement and introduce ultrasound biomicroscopy (UBM) as an examination with which to follow disease progression in relation to deposition in cornea, angle, and iris, Methods. We describe a Ii-year-old boy with a clinical and laboratorial diagnosis of MPS VI who developed increasing bilateral corneal opacification and decreased visual acuity. He underwent two seriate UBM (50-MHz transducer) evaluations. Results. UBM examination showed diffuse and homogeneous stromal hyper-reflective deposit in both eyes and an increase in peripheral corneal thickness throughout time. Conclusion. High-frequency ultrasound documentation of corneal deposit and anterior segment involvement in a patient with Maroteaux-Lamy syndrome is unique, and follow-up revealed thickening of the corneal periphery, which may be related to the progression of the disease (continuous mucopolysaccharide deposits in corneal stroma). UBM was used to locate and document the deposit, as well as to accompany the deposit's evolution, characterizing corneal changes and angle structure involvement.
- ItemSomente MetadadadosIs preoperative ciliary body and iris anatomical configuration a predictor of malignant glaucoma development?(Wiley-Blackwell, 2013-08-01) Prata, Tiago S. [UNIFESP]; Dorairaj, Syril; De Moraes, Carlos G. V.; Mehta, Siddhart; Sbeity, Zaher; Tello, Celso; Liebmann, Jeffrey; Ritch, Robert; New York Eye & Ear Infirm; NYU; New York Med Coll; Mayo Clin; Universidade Federal de São Paulo (UNIFESP)BackgroundTo investigate anatomical configuration of ciliary body and iris using ultrasound biomicroscopy as a predictor of malignant glaucoma development.DesignRetrospective study in a tertiary care hospital.ParticipantsCohort of 31 consecutive patients diagnosed with post-surgical malignant glaucoma.MethodsAnterior chamber angle, iris and ciliary body configuration of involved eyes that had ultrasound biomicroscopy evaluation prior to the malignant glaucoma onset were evaluated. in cases with no presurgical ultrasound biomicroscopy exam of the involved eye, images from the fellow eye (imaged within 6 months) were analysed.Main Outcome MeasuresQualitative parameters.ResultsThirty-one eyes (31 patients) had confirmed malignant glaucoma between 1996 and 2008. Most patients were women (65%) and had an anatomical narrow angle or angle-closure glaucoma (77%). Mean intraocular pressure at diagnosis was 30.413.5 mmHg. the most common operation was trabeculectomy with mitomycin C (55%, 17/31 eyes), combined (3/17) or not (14/17) with cataract extraction and intraocular lens implantation. Among these 31 cases, we were able to evaluate the ultrasound biomicroscopy images of 13 patients (13 eyes) including involved eyes imaged prior to the malignant glaucoma onset or eligible fellow eyes. A narrow angle with or without iridotrabecular contact was found in all eyes. A large and/or anteriorly positioned ciliary body associated with an iris root angulating forward and centrally, revealing a plateau iris configuration, was noticed in 85% (11/13) of these eyes.ConclusionIdentification of plateau iris configuration by ultrasound biomicroscopy should be considered as a possible predictor of post-operative malignant glaucoma development.
- ItemSomente MetadadadosPosterior amorphous corneal dystrophy ultrasound biomicroscopy findings in two cases(Lippincott Williams & Wilkins, 2002-03-01) Branco, B. C.; Chalita, MRC; Casanova, FHC; Barbosa, A.; Branco, C.; Allemann, N.; Freitas, D. de; Universidade Federal de São Paulo (UNIFESP)We present two cases of posterior amorphous corneal dystrophy in members of the same family. We correlated the clinical findings with refraction. topography. and ultrasound biomicroscopy (UBM). This is the first report of UBM findings in amorphous corneal dystrophy and we describe the depth of stromal opacification measured in this exam. Additional cases will be of great help to reinforce these findings.
- ItemSomente MetadadadosUltrasound biomicroscopy in recently postoperative 23-gauge transconjunctival vitrectomy sutureless self-sealing sclerotomy(Lippincott Williams & Wilkins, 2009-10-01) Teixeira, Anderson [UNIFESP]; Allemann, Norma [UNIFESP]; Yamada, Ana Carolina Noriko [UNIFESP]; Uno, Fausto [UNIFESP]; Maia, Andre [UNIFESP]; Bonomo, Pedro Paulo [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)Purpose: To evaluate the ultrasound biomicroscopy (UBM) images of recent postoperative 23-gauge vitrectomy using single- and 2-step techniques.Methods: Twelve consecutive eyes were randomized and submitted to 23-gauge sutureless transconjunctival vitrectomy surgery divided in 2 groups: 1) using a beveled trocar to insert the microcannula (single step) and 2) using a stiletto blade to perform first a tunnel incision and then insert the microcannula (2 steps). All patients underwent 3-port vitrectomy with a straight angled incision of 20 degrees to 30 degrees. Ultrasound biomicroscopy examination was performed after 8 days to 10 days of surgery to locate and document the sclerotomy sites.Results: All patients had at least two diameters of the incision measured, and all wounds were constructed obliquely. Single-step sclerotomy mean size was 375.40 mu m +/- 83.70 mu m (range, 280.4-695 mu m) and coefficient of variation (CV) was 0.21. Two-step sclerotomy mean size was 315,5 mu m +/- 56.8 mu m (range, 253.2-362.5 mu m; CV - 0.26; P = 0.556). Two patients had an intraocular 5,000 centistokes silicone oil injection, one for each group. Only in the single-step incision was silicone oil observed in the wound.Conclusion: Twenty-three-gauge single- and two-step sclerotomies showed no statistical difference in site diameter at UBM. Postoperative UBM examination allowed the evaluation of the wound architecture. A large sample size comparing both surgical techniques should provide a statistical difference. RETINA 29:1305-1309, 2009