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Espinoza G, Pedraza-Concha A, Tello A, Galvis V, Rangel CM, Castellanos YA. Cystoid Macular Edema after an uncomplicated Gonioscopy- Assisted Transluminal Trabeculotomy on a previously vitrec- tomized patient. Clin Ter 2022; 173:198-202. [PMID: 35612329 DOI: 10.7417/ct.2022.2417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
PURPOSE The main purpose of this study was to report a case of cystoid macular edema (CME) after gonioscopy-assisted transluminal trabeculotomy (GATT). METHODS We describe the case of a 73-year-old woman with ocular hypertension and history of cataract surgery combined with posterior vitrectomy and epiretinal membrane peeling 2 years before, who developed CME after uncomplicated GATT procedure. RESULTS Uneventful GATT surgery was performed in an eye with ocular hypertension. A month after GATT surgery, the patient com-plained of blurry vision. Best corrected visual acuity had deteriorated from 20/20 on Snellen chart, to 20/70. The patient was diagnosed with CME. Treatment with topical non-steroidal anti-inflammatory drug (NSAID) and topical corticosteroids for one month, and oral carbonic anhydrase inhibitor for one week achieved a total CME regression with recovery of a normal macular and foveal architecture. CONCLUSIONS Surgery-induced CME may occur following stand-alone microinvasive glaucoma surgery (MIGS) such as GATT. It would be worthwhile to conduct studies to explore whether the prophylactic use of NSAID and corticosteroids is justified.
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Affiliation(s)
- G Espinoza
- Centro Oftalmologico Virgilio Galvis, Floridablanca, Colombia
- Fundacion Oftalmológica de Santander FOSCAL, Floridablanca, Colombia
| | - A Pedraza-Concha
- Fundacion Oftalmológica de Santander FOSCAL, Floridablanca, Colombia
- Universidad Industrial de Santander UIS, Bucaramanga, Colombia
| | - A Tello
- Centro Oftalmologico Virgilio Galvis, Floridablanca, Colombia
- Fundacion Oftalmológica de Santander FOSCAL, Floridablanca, Colombia
- Universidad Autonoma de Bucaramanga UNAB
| | - V Galvis
- Universidad Autonoma de Bucaramanga UNAB
- Fundacion Oftalmológica de Santander FOSCAL, Floridablanca, Colombia
- Centro Oftalmologico Virgilio Galvis, Floridablanca, Colombia
| | - C M Rangel
- Centro Oftalmologico Virgilio Galvis, Floridablanca, Colombia
- Fundacion Oftalmológica de Santander FOSCAL, Floridablanca, Colombia
- Universidad Autonoma de Bucaramanga UNAB
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Rangel CM, Blanco NA, Pedraza-Concha A, Gomez MA, Parra MM, Arias JD. Plasma rich in growth factors as treatment for a full-thickness macular hole due to macular telangiectasia type 2. Arch Soc Esp Oftalmol (Engl Ed) 2022; 97:219-223. [PMID: 35523468 DOI: 10.1016/j.oftale.2020.11.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Accepted: 11/21/2020] [Indexed: 06/14/2023]
Abstract
Full-thickness macular hole is a rare complication of macular telangiectasia type 2, and its treatment is still controversial. A patient with a full-thickness macular hole secondary to macular telangiectasia type 2 underwent vitreoretinal surgery with a plasma rich in growth factors membrane in the macular hole. At the sixth month of follow-up, anatomical and functional improvements were achieved, with no adverse effects. Plasma rich in growth factors is a new option, with advantages due to its biological properties that achieves good results in terms of safety and effectiveness in the surgical treatment of macular hole.
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Affiliation(s)
- C M Rangel
- Fundación Oftalmológica de Santander, Centro Oftalmológico Virgilio Galvis, Universidad Industrial de Santander, Universidad Autónoma de Bucaramanga, Santander, Colombia
| | - N A Blanco
- Universidad Industrial de Santander, Fundación Oftalmológica de Santander, Santander, Colombia
| | - A Pedraza-Concha
- Universidad Industrial de Santander, Fundación Oftalmológica de Santander, Santander, Colombia.
| | - M A Gomez
- Universidad Autónoma de Bucaramanga, Fundación Oftalmológica de Santander, Santander, Colombia
| | - M M Parra
- FOSCAL Internacional, Centro Oftalmológico Virgilio Galvis, Santander, Colombia
| | - J D Arias
- FOSCAL Internacional, Centro Oftalmológico Virgilio Galvis, Santander, Colombia
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Rangel CM, Blanco NA, Pedraza-Concha A, Gomez MA, Parra MM, Arias JD. Plasma rich in growth factors as treatment for a full-thickness macular hole due to macular telangiectasia type 2. Arch Soc Esp Oftalmol (Engl Ed) 2021; 97:S0365-6691(20)30491-3. [PMID: 33627242 DOI: 10.1016/j.oftal.2020.11.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 10/21/2020] [Accepted: 11/21/2020] [Indexed: 11/26/2022]
Abstract
Full-thickness macular hole is a rare complication of macular telangiectasia type 2, and its treatment is still controversial. A patient with a full-thickness macular hole secondary to macular telangiectasia type 2 underwent vitreoretinal surgery with a plasma rich in growth factors membrane in the macular hole. At the sixth month of follow-up, anatomical and functional improvements were achieved, with no adverse effects. Plasma rich in growth factors is a new option, with advantages due to its biological properties that achieves good results in terms of safety and effectiveness in the surgical treatment of macular hole.
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Affiliation(s)
- C M Rangel
- Fundación Oftalmológica de Santander, Centro Oftalmológico Virgilio Galvis, Universidad Industrial de Santander, Universidad Autónoma de Bucaramanga, Santander, Colombia
| | - N A Blanco
- Universidad Industrial de Santander, Fundación Oftalmológica de Santander, Santander, Colombia
| | - A Pedraza-Concha
- Universidad Industrial de Santander, Fundación Oftalmológica de Santander, Santander, Colombia.
| | - M A Gomez
- Universidad Autónoma de Bucaramanga, Fundación Oftalmológica de Santander, Santander, Colombia
| | - M M Parra
- FOSCAL Internacional, Centro Oftalmológico Virgilio Galvis, Santander, Colombia
| | - J D Arias
- FOSCAL Internacional, Centro Oftalmológico Virgilio Galvis, Santander, Colombia
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Batalović K, Radaković J, Bundaleski N, Rakočević Z, Pašti I, Skorodumova NV, Rangel CM. Origin of photocatalytic activity enhancement in Pd/Pt-deposited anatase N-TiO 2- experimental insights and DFT study of the (001) surface. Phys Chem Chem Phys 2020; 22:18536-18547. [PMID: 32780047 DOI: 10.1039/d0cp03186k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In pursuit of the ideal photocatalyst, cheap and stable semiconductor TiO2 is considered to be a good choice if one is able to reduce its band gap and decrease the recombination rate of charge carriers. The approach that offers such improvements for energy conversion applications is the modification of TiO2 with nitrogen and noble metals. However, the origin of these improvements and possibilities for further design of single-atom catalysts are not always straightforward. To shed light on the atomic-scale picture, we modeled the nitrogen-doped (001) anatase TiO2 surface as a support for palladium and platinum single-atom deposition. The thermodynamics of various synthesis routes for Pd/Pt deposition and nitrogen doping is considered based on density functional theory (DFT)-calculated energies, highlighting the effect of nitrogen doping on metal dimer formation and metal-support interaction. XPS analysis of the valence band of the modified TiO2 nanocrystals, and the calculated charge transfer and electronic structure of single-atom catalysts supported on the (001) anatase TiO2 surface provide an insight into modifications occurring in the valence zone of TiO2 due to nitrogen doping and Pd/Pt deposition at the surface. DFT results also show that substitutional nitrogen doping significantly increases metal-support interaction, while interstitial nitrogen doping promotes only Pt-support interaction.
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Affiliation(s)
- K Batalović
- "VINČA" Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia.
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Rangel CM, Ortiz Á, Sánchez-Ávila R, Varón C, Cárdenas PL, Escaf LC, Jaramillo D, Rodriguez H. Ophthalmological findings in patients with leukaemia in a Colombian population. ACTA ACUST UNITED AC 2020; 96:242-250. [PMID: 32828605 DOI: 10.1016/j.oftal.2020.05.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2019] [Revised: 05/21/2020] [Accepted: 05/22/2020] [Indexed: 11/15/2022]
Abstract
OBJECTIVE To report the ocular manifestations in patients with leukaemia. METHODS This is a retrospective, descriptive and observational study in patients with ocular manifestations of leukaemia. RESULTS A total of 14 eyes were evaluated corresponding to 8 patients (5 women and 3 men) with ocular manifestations of leukaemia. The mean age at diagnosis was 43 years (31-76 years). Six eyes corresponded to patients with acute myeloid leukaemia (AML), four eyes to acute lymphoid leukaemia (ALL), two eyes to chronic myeloid leukaemia (CML), and the remaining two belonged to patients with hairy cell leukaemia (HCL). The primary ocular findings were choroidal invasion in 12 eyes (85.7%), retinal infiltration in 4 eyes (28.6%), and neuro-ophthalmic disorders in 4 eyes (28.6%). The mean visual acuity improved from 0.689 to 0.449 (logMAR) (P=.012) after the systemic and intrathecal chemotherapy. Of the eight patients, four died from systemic complications of the underlying disease. CONCLUSIONS This is the first report of multiple ocular manifestations secondary to leukaemia in a Colombian population. It is important to keep in mind that this disease is included within the masquerade syndromes and that the ophthalmological findings that, while subtle, can also be devastating and be signs of a life-threatening disease.
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Affiliation(s)
- C M Rangel
- Retina y Vítreo, Fundación Oftalmológica de Santander-Clínica Carlos Ardila Lülle (FOSCAL), Floridablanca, Colombia
| | - Á Ortiz
- Neurooftalmología, Fundación Oftalmológica de Santander-Clínica Carlos Ardila Lülle (FOSCAL), Floridablanca, Colombia
| | - R Sánchez-Ávila
- Oftalmología, Instituto Universitario Fernández-Vega, Fundación de Investigación Oftalmológica, Universidad de Oviedo, Oviedo, España
| | - C Varón
- Retina y Vítreo, Fundación Oftalmológica de Santander-Clínica Carlos Ardila Lülle (FOSCAL), Floridablanca, Colombia
| | - P L Cárdenas
- Neurooftalmología, Fundación Oftalmológica de Santander-Clínica Carlos Ardila Lülle (FOSCAL), Floridablanca, Colombia
| | - L C Escaf
- Oftalmología, Fundación Oftalmológica de Santander-Clínica Carlos Ardila Lülle (FOSCAL), Floridablanca, Colombia.
| | - D Jaramillo
- Oftalmología, Fundación Oftalmológica de Santander-Clínica Carlos Ardila Lülle (FOSCAL), Floridablanca, Colombia
| | - H Rodriguez
- Oftalmología, Fundación Oftalmológica de Santander-Clínica Carlos Ardila Lülle (FOSCAL), Floridablanca, Colombia
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Abstract
Azolebisphosphonates were prepared and used as dopants to obtain new Nafion doped membranes, which exhibited higher proton conductivities than that of Nafion.
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Affiliation(s)
| | - Ana I. de Sá
- Laboratório Nacional de Energia e Geologia
- I.P
- 1649-038 Lisboa
- Portugal
| | - António P. S. Teixeira
- Departamento de Química
- ECT & Centro de Química de Évora
- IIFA
- Universidade de Évora
- 7000-671 Évora
| | - C. M. Rangel
- Laboratório Nacional de Energia e Geologia
- I.P
- 1649-038 Lisboa
- Portugal
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Batalović K, Bundaleski N, Radaković J, Abazović N, Mitrić M, Silva RA, Savić M, Belošević-Čavor J, Rakočević Z, Rangel CM. Modification of N-doped TiO 2 photocatalysts using noble metals (Pt, Pd) - a combined XPS and DFT study. Phys Chem Chem Phys 2017; 19:7062-7071. [PMID: 28225131 DOI: 10.1039/c7cp00188f] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Nitrogen-doped TiO2 (N-TiO2) is considered as one of the most promising materials for various photocatalytic applications, while noble metals Pd and Pt are known as good catalysts for hydrogen evolution. This work focuses on the determination of structural and electronic modifications of N-TiO2, achieved by noble metal deposition at the surface, as a starting indicator for potential applications. We focus on the properties of easily synthesized nanocrystalline nitrogen-doped anatase TiO2, modified by depositing small amounts of Pd (0.05 wt%) and Pt (0.10 wt%), aiming to demonstrate efficient enhancement of optical properties. The chemical states of dopants are studied in detail, using X-ray photoemission spectroscopy, to address the potential of N-TiO2 to act as a support for metallic nanoparticles. DFT calculations are used to resolve substitutional from interstitial nitrogen doping of anatase TiO2, as well as to study the combined effect of nitrogen doping and oxygen vacancy formation. Based on the binding energies calculated using Slater's transition state theory, dominant contribution to the N 1s binding energy at 399.8 eV is ascribed to interstitially doped nitrogen in anatase TiO2. Given that both structure and photocatalytic properties depend greatly on the synthesis procedure, this work contributes further to establishing correlation between the structure and optical properties of the noble metal modified N-TiO2 system.
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Affiliation(s)
- K Batalović
- Institute of Nuclear Sciences Vinča, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia.
| | - N Bundaleski
- Institute of Nuclear Sciences Vinča, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia.
| | - J Radaković
- Institute of Nuclear Sciences Vinča, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia.
| | - N Abazović
- Institute of Nuclear Sciences Vinča, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia.
| | - M Mitrić
- Institute of Nuclear Sciences Vinča, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia.
| | - R A Silva
- LNEG, National Laboratory for Energy and Geology, Paço do Lumiar 22, 1649-038 Lisbon, Portugal
| | - M Savić
- Institute of Nuclear Sciences Vinča, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia.
| | - J Belošević-Čavor
- Institute of Nuclear Sciences Vinča, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia.
| | - Z Rakočević
- Institute of Nuclear Sciences Vinča, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia.
| | - C M Rangel
- LNEG, National Laboratory for Energy and Geology, Paço do Lumiar 22, 1649-038 Lisbon, Portugal
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de Sá AI, Rangel CM, Jorge MEM. Electrochemical behavior of europium perovskites (Ca0.6Eu0.4MnO3) in alkaline aqueous media. J Solid State Electrochem 2016. [DOI: 10.1007/s10008-016-3184-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Sousa T, Rangel CM. Pore scale modelling of a cathode catalyst layer in fuel cell environment: agglomerate reconstruction and variables optimization. J Solid State Electrochem 2015. [DOI: 10.1007/s10008-015-3076-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Teixeira FC, Rangel CM, Teixeira APS. Synthesis of New Azole Phosphonate Precursors for Fuel Cells Proton Exchange Membranes. Heteroatom Chem 2015. [DOI: 10.1002/hc.21254] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Fátima C. Teixeira
- Laboratório Nacional de Energia e Geologia, I.P; Estrada do Paço do Lumiar, 22 1649-038 Lisboa Portugal
| | - C. M. Rangel
- Laboratório Nacional de Energia e Geologia, I.P; Estrada do Paço do Lumiar, 22 1649-038 Lisboa Portugal
| | - António P. S. Teixeira
- Departamento de Química, Escola de Ciências e Tecnologia; Centro de Química de Évora; Instituto de Investigação e Formação Avançada; Universidade de Évora; R. Romão Ramalho, 59 7000-671 Évora Portugal
- Centro de Química Estrutural, IST; Universidade de Lisboa; Av. Rovisco Pais, 1 1049-001 Lisboa Portugal
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Silva RA, Soares CO, Carvalho MD, Rangel CM, da Silva Pereira MI. Stability of LaNiO3 gas diffusion oxygen electrodes. J Solid State Electrochem 2013. [DOI: 10.1007/s10008-013-2330-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Teixeira FC, Rangel CM, Teixeira APS. New azaheterocyclic aromatic diphosphonates for hybrid materials for fuel cell applications. NEW J CHEM 2013. [DOI: 10.1039/c3nj00585b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Henriquez-Román JH, Sancy M, Páez MA, Padilla-Campos L, Zagal JH, Rangel CM, Thompson GE. The influence of aniline and its derivatives on the corrosion behaviour of copper in acid solution. J Solid State Electrochem 2005. [DOI: 10.1007/s10008-004-0586-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Riveros V, Gulppi M, Páez M, Zagal JH, Rangel CM, Huerta D, Skeldon P, Thompson GE. Influence of surface treatments in the initial stages of anodizing Al–Ag alloys in neutral electrolytes. J Solid State Electrochem 2005. [DOI: 10.1007/s10008-005-0659-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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