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Makwana M, Merola JP, Bhatti I, Patel CK, Leach PA. Towards improved outcome in children treated surgically for spontaneous intracranial suppuration in South Wales. Br J Neurosurg 2023; 37:45-48. [PMID: 33428472 DOI: 10.1080/02688697.2020.1868403] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
INTRODUCTION Spontaneous central nervous system (CNS) infections in children are rare. Treatment involves surgical intervention and antibiotic therapy. We describe a single centre experience of managing this condition in South Wales. METHODS We performed a retrospective review of surgically managed cases in our unit for patients under 18 years of age between 2008 and 2018. Data were collected regarding aetiology, location, microbiology examination, treatment and outcomes. RESULTS Twenty-six patients were identified of which 25 case notes were available. Fifteen were male and 10 were female. Median age was 12 years (age range 0.3-17 years). Seven patients (28%) had a burr-hole aspiration and 18 (72%) underwent craniotomy. A second procedure was performed in 10 (40%) and a third procedure in two (8%). Fourteen (56%) had a brain abscess, 10 (40%) had subdural empyema (one was bilateral) and one (4%) had an extradural empyema. Fifteen (60%) had a raised WCC (>11.5 × 109/L) and 22 (88%) had a CRP of >10 mg/L at presentation. Three (12%) patients had a normal WCC and CRP at presentation. Overall, 12 (48%) were secondary to sinus infection, with the most common organism being Streptococcus. Seven (28%) were due to otitis media or mastoiditis, six (24%) had no cause identified. The mean number of CT/MRI scans was 6.7 (range 3-13). The mean follow-up period was 16.7 months (range 1-117 months). At last follow up, 19 (76%) had a GOS of 5, five (20%) had a GOS of 4 and one (12%) had GOS of 3. There were no deaths. CONCLUSIONS In Wales, outcomes have improved over time in keeping with other paediatric neurosurgical units in England. Increased availability of imaging resources in our hospital and use of neuro-navigation for all cases in our unit as well as earlier identification of sepsis, communication with microbiologists with dedicated ward rounds and, enhanced identification of causative organisms and contemporary anti-microbials have also contributed towards the improved management of this condition.
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Schiff ER, Aychoua N, Nutan S, Davagnanam I, Moore AT, Robson AG, Patel CK, Webster AR, Arno G. Variability of retinopathy consequent upon novel mutations in LAMA1. Ophthalmic Genet 2022; 43:671-678. [PMID: 35616092 DOI: 10.1080/13816810.2022.2076283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
PURPOSE Bi-allelic mutations in LAMA1 (laminin 1) (OMIM # 150320) cause Poretti-Boltshauser Syndrome (PTBHS), a rare non-progressive cerebellar dysplasia disorder with ophthalmic manifestations including oculomotor apraxia, high myopia, and retinal dystrophy. Only 38 variants, nearly all loss of function have been reported. Here, we describe novel LAMA1 variants and detailed retinal manifestations in two unrelated families. METHODS Whole-genome sequencing was conducted on three siblings of a consanguineous family with myopia and retinal dystrophy and on a child from an unrelated non-consanguineous couple. Clinical evaluation included full ophthalmic examination, detailed colour, autofluorescence retinal imaging, retinal optical coherence tomography (OCT), fluorescein angiography under anesthesia, and pattern and full-field electroretinography. RESULTS Genetic analysis revealed a novel homozygous LAMA1 frameshift variant, c.1492del p.(Arg498Glyfs *25), in the affected siblings in family 1 and a novel frameshift c.3065del p.(Gly1022Valfs *2) and a deletion spanning exons 17-23 in an unrelated individual in family 2. Two of the three siblings and the unrelated child had oculomotor apraxia in childhood; none of the siblings had symptoms of other neurological dysfunction as adults. All four had myopia. The affected siblings had a qualitatively similar retinopathy of wide-ranging severity. The unrelated patient had a severe abnormality of retinal vascular development, which resulted in vitreous haemorrhage and neovascular glaucoma in the left eye and a rhegmatogenous retinal detachment in the right eye. CONCLUSIONS This report describes the detailed retinal structural and functional consequences of LAMA1 deficiency in four patients from two families, and these exhibit significant variability with evidence of both retinal dystrophy and abnormal and incomplete retinal vascularisation.
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Sharma A, Ali A, Henderson RH, Patel CK, VandenHoven C, Lam WC. Accuracy of scleral transillumination techniques to identify infant ciliary body for sclerostomy and intravitreal injections. Clin Exp Ophthalmol 2018; 47:478-483. [PMID: 30417514 DOI: 10.1111/ceo.13442] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 08/20/2018] [Accepted: 10/29/2018] [Indexed: 12/01/2022]
Abstract
IMPORTANCE There is variation in the literature for sclerotomy and intravitreal injection placement in young children, ranging from 0.5 to 3.0 mm from the limbus. We assess the accuracy of scleral transillumination to identify the ciliary body in infants for safe sclerotomy and intravitreal injections in young children. BACKGROUND The study compares the perilimbal "dark band" seen on scleral transillumination (STI) with the ultrasound biomicroscopy (UBM), and compares these measurements with the current guidelines for sclerotomy in infants. DESIGN Prospective case series in a tertiary paediatric hospital. PARTICIPANTS Children aged ≤36 months undergoing general anaesthesia for eye procedures. METHODS Scleral transillumination was performed to measure the perilimbal dark band. UBM of the ciliary body region was then performed, and correlated with transillumination findings. MAIN OUTCOME MEASURES The midpoints of STI and UBM were compared to current cadaver-based guidelines to assess the safe point for sclerotomy. RESULTS Twenty children were recruited, 36 STI and 35 UBM measurements were obtained. The posterior edge of the dark band had good correlation with the posterior border of the ciliary body. Transillumination and UBM correlated well for midpoint measurements. The midpoint of the dark band on transillumination was confirmed to be in the ciliary body by UBM in all cases. CONCLUSIONS AND RELEVANCE The STI technique is a useful and fast technique to demonstrate the ciliary body. The midpoint of the dark band on STI correlates well with the UBM, and has a potential use for confirming safe-entry into the posterior segment if using current guidelines. The current cadaver-based paediatric guidelines safely avoid retinal injury.
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Yusuf IH, Fung THM, Patel CK. Ultra-Widefield Imaging of Retinal Hemorrhages Induced by Scleral Depression. JAMA Ophthalmol 2017; 135:e171418. [PMID: 28715562 DOI: 10.1001/jamaophthalmol.2017.1418] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Yusuf IH, Barnes JK, Fung THM, Elston JS, Patel CK. Non-contact ultra-widefield retinal imaging of infants with suspected abusive head trauma. Eye (Lond) 2017; 31:353-363. [PMID: 28234351 DOI: 10.1038/eye.2017.2] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2016] [Accepted: 11/16/2016] [Indexed: 11/09/2022] Open
Abstract
PurposeThe purpose of the study was to audit the use of non-contact ultra-widefield retinal imaging in infants with suspected abusive head trauma (AHT) using the Optos P200MA Scanning Laser Ophthalmoscope.Patients and methodsA retrospective, observational case series. Ten eyes of five consecutive infants (aged 1-15 months) with suspected (or in 1 case, known) AHT referred for an ophthalmological opinion were included. Each infant underwent non-contact ultra-widefield retinal imaging using the Optos P200MA scanning laser ophthalmoscope. Optos fundus fluorescein angiography (FFA) was performed in one infant with oral sedation. The other four infants did not require sedation. The main outcome measure was the acquisition of a single, definitive ultra-widefield retinal image in each eye. Safety was audited by determining adverse changes in heart rate and oxygen saturations that required cessation of imaging.ResultsThe Optos P200MA ultra-widefield scanning laser ophthalmoscope acquired good quality retinal images in all infants. Documentation of acute, widespread retinal haemorrhages contributed to a diagnosis of AHT in three infants. Chronic pre-macular haemorrhage and macular schisis were documented by FFA in a fourth infant. The absence of retinal haemorrhages was documented in a fifth infant contributing to the exclusion of a diagnosis of AHT. There were no adverse safety signals in any infant in this series.ConclusionThe Optos P200MA ultra-widefield scanning laser ophthalmoscope appears safe to use in infants with suspected AHT, providing high-quality retinal images in a single frame without ocular contact. Optos P200MA may be used as alternative to RetCam to document retinal haemorrhages in stable infants with suspected AHT.
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Yusuf IH, Wu AD, Patel CK. Optic disc optical coherence tomography imaging through a black intraocular lens. Clin Exp Optom 2016; 100:198-199. [PMID: 27562821 DOI: 10.1111/cxo.12422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Accepted: 04/12/2016] [Indexed: 11/29/2022] Open
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Petousis V, Sallam AA, Haynes RJ, Patel CK, Tyagi AK, Kirkpatrick JN, Johnston RL. Risk factors for retinal detachment following cataract surgery: the impact of posterior capsular rupture. Br J Ophthalmol 2016; 100:1461-1465. [PMID: 26858087 DOI: 10.1136/bjophthalmol-2015-307729] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2015] [Revised: 12/13/2015] [Accepted: 01/10/2016] [Indexed: 11/04/2022]
Abstract
AIM To investigate risk factors for retinal detachment (RD) after cataract surgery, particularly posterior capsular rupture (PCR) with or without vitreous loss. METHODS Single centre electronic medical record database study of 18 065 consecutive first eye cataract operations performed between 2005 and 2014. Survival analysis was performed with Kaplan-Meier curves and a Cox proportional hazard regression analysis to calculate HRs with respect to RD. RESULTS The RD rate at 3 months and 7 years was 0.067% and 0.30%, respectively, with a median time to RD of 15 months (mean: 18 months, range: 0-84 months). Men had a higher RD risk (HR 2.00; 95% CI 1.03 to 3.88; p=0.03) in the univariate model. Patients <60 years and those >80 years had an HR of 5.12 (95% CI 2.60 to 10.07; p<0.001) and 0.16 (95% CI 0.38 to 0.69; p=0.01), respectively, compared with patients 60-80 years of age. Eyes longer than 25 mm had an HR of 3.98 (95% CI 1.93 to 8.20; p<0.001) compared with eyes 23-25 mm. PCR occurred in 400 (2.2%) eyes. The HR for RD was 12.83 (95% CI 5.62 to 29.30; p<0.001) for PCR with vitreous loss. There were no RD events in eyes with PCR without vitreous loss. CONCLUSIONS The risk for RD after cataract surgery is higher in younger patients and eyes with longer axial length or PCR with vitreous loss during surgery.
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Yusuf IH, Salmon JF, Patel CK. Direct ophthalmoscopy should be taught to undergraduate medical students-yes. Eye (Lond) 2015; 29:987-9. [PMID: 26043702 DOI: 10.1038/eye.2015.90] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Yusuf IH, Fung THM, Patel CK. Response to 'Opaque intraocular lens implantation'. Eye (Lond) 2015; 29:980-1. [PMID: 25721521 DOI: 10.1038/eye.2015.19] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Painter SL, Wilkinson AR, Desai P, Goldacre MJ, Patel CK. Incidence and treatment of retinopathy of prematurity in England between 1990 and 2011: database study. Br J Ophthalmol 2014; 99:807-11. [PMID: 25427778 DOI: 10.1136/bjophthalmol-2014-305561] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Accepted: 11/09/2014] [Indexed: 11/04/2022]
Abstract
AIMS To study the incidence and treatment of retinopathy of prematurity (ROP) in England, 1990-2011. METHODS English national Hospital Episode Statistics were analysed, for babies born in hospital and for inpatient admissions, to obtain annual rates of diagnosis of, and treatment for, babies with ROP. National data on low birthweight (LBW) babies, born <1500 g and therefore eligible for ROP screening, were used as denominators in calculating rates of ROP per 1000 babies at risk. RESULTS The recorded incidence of ROP increased tenfold, from 12.8 per 1000 LBW babies in 1990 to 125.5 per 1000 LBW babies in 2011. Tretment rates for ROP by cryotherapy or laser rose from 1.7 to 14.8 per 1000 LBW babies between 1990 and 2011. In 1990, 13.3% of babies with ROP were treated with cryotherapy, which fell to 0.1% in 2011. Rates for laser treatment rose from 1.8% of babies with ROP in 1999 to 11.7% in 2011. CONCLUSIONS Increased neonatal survival, improved awareness of ROP and dissemination of guidance on screening and treatment of ROP will all have contributed to the substantial rise in recorded incidence of ROP between 1990 and 2011. Retinal ablation is now almost always performed using laser treatment rather than cryotherapy.
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Bergmanson JP, Goosey JD, Patel CK, Mathew JH. Recurrence or Re-emergence of Keratoconus – What is the Evidence Telling Us? Literature Review and Two Case Reports. Ocul Surf 2014; 12:267-72. [DOI: 10.1016/j.jtos.2014.05.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Revised: 05/02/2014] [Accepted: 05/04/2014] [Indexed: 11/29/2022]
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Yusuf IH, Fung TH, Wasik M, Patel CK. Transient retinal artery occlusion during phacoemulsification cataract surgery. Eye (Lond) 2014; 28:1375-9. [PMID: 25104741 DOI: 10.1038/eye.2014.190] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Accepted: 07/03/2014] [Indexed: 11/09/2022] Open
Abstract
PURPOSE Transient retinal artery occlusion (TRAO) is a potentially underdiagnosed cause of immediate 'pad off' visual loss following phacoemulsification cataract surgery under sub-Tenon's anaesthesia. METHODS We describe a series of three patients presenting with enigmatic 'pad off' visual loss following phacoemulsification surgery, each diagnosed with TRAO. We describe the variable clinical presentation, illustrate the value of optical coherence tomography (OCT) imaging in establishing the diagnosis, and present the final visual outcomes. RESULTS Clinical findings alone may be subtle and inadequate in localising the pathology in patients with TRAO. Cross-comparison of superior and inferior macula OCT profiles in branch-pattern arterial occlusion-and between healthy and affected eyes in central-pattern arteriolar occlusion-is critical in clinching the diagnosis. The typical evolution of OCT appearance is acute-phase inner retinal thickening/oedema and hyperreflectivity followed by progressive, late-phase inner retinal atrophy. Visual acuity may recover but central scotomas, and defects in colour perception may persist. CONCLUSION The diagnosis of TRAO is challenging; delayed presentation may resolve fundal and retinal angiographic abnormalities. OCT may be the only imaging modality that can provide objective evidence of TRAO. Meticulous comparison/segmentation of OCT images is therefore mandatory in patients presenting with acute post-operative visual loss to exclude TRAO.
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Yusuf IH, Izadi S, Fung THM, Sallam A, Patel CK. Multifocal Necrotizing Chorioretinitis Following Phacoemulsification Surgery. Ocul Immunol Inflamm 2014; 23:261-5. [PMID: 24785099 DOI: 10.3109/09273948.2014.891756] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
INTRODUCTION Toxoplasma chorioretinitis is a leading cause of infectious posterior uveitis worldwide. METHODS We report an atypical presentation of Toxoplasma chorioretinitis presenting after uneventful cataract surgery in an 81-year-old male, with known hypernephroma and rheumatoid arthritis, treated with prednisolone and methotrexate. RESULTS He was treated for acute retinal necrosis and cytomegalovirus retinitis before Toxoplasma chorioretinitis was confirmed by vitreous biopsy 11 months after presentation. He developed a secondary rhegmatogenous retinal detachment, treated successfully with pars plana vitrectomy, silicone oil and endolaser. Visual acuity at discharge was 6/12 following silicone oil removal. DISCUSSION Necrotising chorioretinitis in immunosuppressed or elderly patients may present with an atypical phenotype. Clinical diagnosis in this context remains challenging. We discuss the clinical reasoning behind investigation and management of this patient group in whom viral and Toxoplasma retinitis may be clinically indistinguishable. The significance of vitreous PCR results in clinical decision making in the context of infectious posterior uveitis is discussed.
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Fung THM, Yusuf IH, Smith LM, Brett J, Weston L, Patel CK. Outpatient Ultra wide-field intravenous fundus fluorescein angiography in infants using the Optos P200MA scanning laser ophthalmoscope. Br J Ophthalmol 2013; 98:302-4. [DOI: 10.1136/bjophthalmol-2013-304450] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Muqit MMK, Xue K, Patel CK. National survey of progressive symptomatic retinal detachment complicating retinoschisis in the United Kingdom. Eye (Lond) 2013; 27:1425-6. [PMID: 24136569 DOI: 10.1038/eye.2013.230] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Zinkernagel M, Papazoglou A, Patel CK. Bimanual anterior segment revision surgery for anterior capsule contraction syndrome associated with anterior flexion of intraocular lens haptics. Eye (Lond) 2013; 27:1388-90. [PMID: 24037236 DOI: 10.1038/eye.2013.206] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2012] [Accepted: 08/19/2013] [Indexed: 11/09/2022] Open
Abstract
PURPOSE To report the incidence of anterior capsule contraction syndrome (ACCS) and to present a novel minimally invasive bimanual technique for anterior segment revision surgery associated with ACCS with anterior flexion of the intraocular lens haptics. METHODS A consecutive cohort of 268 eyes of 161 patients undergoing phacoemulsification and implantation of the same type of hydrophilic acrylic aspheric intraocular lens cohort were analysed and a novel technique of minimally invasive bimanual technique for anterior segment revision surgery is described. RESULTS We identified four eyes (1.5%) of three patients with advanced ACCS. Successful restoration of a clear visual axis with minimal induction of astigmatism and rapid visual rehabilitation was achieved in all four cases. CONCLUSION This technique is a safe and minimally invasive alternative to laser or vitrector-cut capsulotomy to restore a clear visual axis. In cases of advanced ACCS, it offers the option for haptic reposition or amputation.
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Yusuf IH, Peirson SN, Patel CK. Black intraocular lenses: near infra-red light transmission may risk treatment failure. Br J Ophthalmol 2013; 97:1353-4. [PMID: 23902677 PMCID: PMC3786660 DOI: 10.1136/bjophthalmol-2013-303474] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Yusuf IH, Peirson SN, Patel CK. Near-infrared transillumination photography to detect anterior uveal melanomas through black IOLs. Br J Ophthalmol 2013; 97:943-5. [PMID: 23686325 PMCID: PMC3686250 DOI: 10.1136/bjophthalmol-2013-303574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
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Yusuf IH, Peirson SN, Patel CK. Occlusive IOLs for intractable diplopia demonstrate a novel near-infrared window of transmission for SLO/OCT imaging and clinical assessment. Invest Ophthalmol Vis Sci 2011; 52:3737-43. [PMID: 21372014 DOI: 10.1167/iovs.10-6767] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
PURPOSE Occlusive intraocular lens (IOL) implantation is an effective therapeutic option in patients with intractable diplopia, visual confusion, and unsightly leukocoria. However, their use has been restricted by concerns that inability to visualize the retina may prevent the diagnosis of important posterior pole diseases. In this study, transmission spectra of occlusive IOLs were defined as a basis for acquiring scanning laser ophthalmoscopy/optical coherence tomography (SLO/OCT) images. METHODS Fifteen IOLs of three designs were examined: black small and large PMMA and black Lotus (Morcher GmbH, Stuttgart, Germany). Each IOL was placed between a broad-spectrum white light source and a spectroradiometer, to generate transmission spectra for each lens and determine the cutoff wavelength. Transmission in the near-infrared (NIR) range was confirmed with an 850-nm LED. A model eye was implanted with occlusive IOLs, and SLO/OCT scans were acquired with seven clinical SLO/OCT imaging systems. RESULTS Occlusive IOLs demonstrated high levels of transmission of NIR light. It was determined that most SLO/OCT scanners would achieve 99% to 100% transmission at their operational wavelengths of NIR light. Furthermore, all clinical SLO/OCT imaging systems were capable of imaging fine retinal features without attenuation through occlusive IOLs in a model eye. CONCLUSIONS In this study, a novel NIR window of high-level transmission was identified across the occlusive IOLs with applications to SLO/OCT imaging and NIR-based clinical assessment. The ability to acquire high-quality SLO/OCT scans to detect posterior pole disease may fundamentally change the current view on occlusive IOLs and encourage their use in patients with intractable diplopia.
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K. Patel C, Ahmed S. Synthesis and In Vitro Biochemical Evaluation of a Series of Alkyl 6- Aminosulfonyl Naphthanoates as Potential Inhibitors of Human Placental Estrone Sulfatase (ES). LETT DRUG DES DISCOV 2011. [DOI: 10.2174/157018011793663967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Methfessel CE, Stewart GR, Matthias BT, Patel CK. Why is there no bulk specific heat anomaly at the superconducting transition temperature of BaPb(1-x) Bi(x) O(3)? Proc Natl Acad Sci U S A 2010; 77:6307-8. [PMID: 16592913 PMCID: PMC350272 DOI: 10.1073/pnas.77.11.6307] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Caloric measurements have shown that there is no bulk specific heat anomaly at the superconducting transition temperature of BaPb(0.75)Bi(0.25)O(3).
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Yusuf IH, Patel CK. A sticky sight: cyanoacrylate 'superglue' injuries of the eye. BMJ Case Rep 2010; 2010:bcr11.2009.2435. [PMID: 22442649 DOI: 10.1136/bcr.11.2009.2435] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
A 64-year-old man presented to casualty with blurred vision and pain in his left eye, 2 h after inadvertently instilling clear nail glue into his eye instead of postoperative Timolol eye drops. The glue was removed at the slit lamp revealing a corneal abrasion, which was managed with topical antibiotics. Inadvertent ocular cyanoacrylate, or 'superglue', instillation has been reported frequently since 1982 when superglue was repackaged into ophthalmic style dropper bottles. This case report highlights the continuing problem of cyanoacrylate eye injuries and serves as a reminder to healthcare professionals to report such incidents to manufacturers and regulatory bodies, on behalf of their patients, to promote the introduction of universal safety mechanisms on all household chemical containers. Failure of glue manufacturers to introduce safety cap mechanisms has resulted in significant ocular morbidity over the last 27 years, and such incidents are expected to occur until superglue bottles are redesigned.
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Dhingra S, Patel CK. Diagnosis and pathogenesis of congenital X-linked retinoschisis with optical coherence tomography. J Pediatr Ophthalmol Strabismus 2010; 47:105-7. [PMID: 20349904 DOI: 10.3928/01913913-20100308-09] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2008] [Accepted: 04/08/2008] [Indexed: 11/20/2022]
Abstract
This study shows how optical coherence tomography has been valuable in the diagnosis of congenital X-linked retinoschisis. An infant with convergent strabismus underwent serial optical coherence tomography examinations that helped to make the diagnosis of congenital X-linked retinoschisis. Optical coherence tomography is useful in the diagnosis of congenital X-linked retinoschisis and adds new information about pathogenesis. The authors recommend the use of optical coherence tomography in pediatric retinal disease, even if the macula appears normal on indirect ophthalmoscopy.
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Harris PD, Farmery AD, Patel CK. The challenges of positioning an infant undergoing optical coherence tomography under general anesthesia. Paediatr Anaesth 2009; 19:64-5. [PMID: 19076521 DOI: 10.1111/j.1460-9592.2008.02688.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Mead AL, Chen SD, Wilkinson A, Patel CK. Anaesthesia for the laser treatment of neonates with retinopathy of prematurity. Eye (Lond) 2008; 22:734. [PMID: 18188171 DOI: 10.1038/sj.eye.6703083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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