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PloS One 2021To systematically review the evidence on the diagnostic accuracy and prognostic value of retinal optical coherence tomography (OCT) to detect visual acuity (VA) or... (Meta-Analysis)
Meta-Analysis
PURPOSE
To systematically review the evidence on the diagnostic accuracy and prognostic value of retinal optical coherence tomography (OCT) to detect visual acuity (VA) or visual field (VF) loss in children with a brain tumour.
METHODS
PubMed, Embase and Cochrane Library databases were searched from inception to February 2021. We included studies evaluating retinal OCT and standard visual function parameters (VA and or VF) in children with a brain tumour. Two authors independently extracted data from each included study. They also assessed the methodological quality of the studies using the QUADAS-2 or QUIPS tool. The diagnostic accuracy of OCT was evaluated with receiver operating characteristic analysis, sensitivity, specificity, positive predictive value and negative predictive value. The prognostic value of OCT was evaluated with predictive measures (odds ratio).
RESULTS
We included five diagnostic studies, with a total of 186 patients, all diagnosed with optic pathway glioma. No prognostic studies were eligible for inclusion. Included studies evaluated either retinal nerve fiber layer (RNFL) thickness or ganglion cell layer-inner plexiform layer (GCL-IPL) thickness. There was considerable heterogeneity between OCT devices, OCT protocols, visual function parameters and threshold values. Sensitivity and specificity for RNFL thickness measurement ranged from 60.0% to 100.0% and 76.6% to 100%, respectively. For GCL-IPL thickness measurement, area under the curve ranged from 0.91 to 0.98 for different diameters.
CONCLUSION
The literature regarding the diagnostic accuracy and prognostic value of OCT parameters in children with a brain tumour is scarce. Due to heterogeneity and a considerable risk of bias of included studies, we cannot draw solid conclusions regarding the accuracy of retinal OCT. Future research should investigate the potential of OCT as diagnostic and prognostic tool for the evaluation of the visual function and detection of visual impairment in children with any type of brain tumour.
Topics: Brain Neoplasms; Child; Humans; Optic Nerve Glioma; Prognosis; Tomography, Optical Coherence; Visual Acuity; Visual Field Tests
PubMed: 34941930
DOI: 10.1371/journal.pone.0261631 -
Eye (London, England) Apr 2024Mild traumatic brain injury (mTBI) is common with many patients suffering disabling long-term sequelae, with visual symptoms frequently reported. There are no objective... (Review)
Review
Mild traumatic brain injury (mTBI) is common with many patients suffering disabling long-term sequelae, with visual symptoms frequently reported. There are no objective biomarkers of mTBI that are routinely used in clinical practice. Optical coherence tomography (OCT) has been used in mTBI research, as it enables visualisation of the neuroretina, allowing measurement of the retinal nerve fibre layer and ganglion cell layer. This systematic review aims to appraise the available literature and assess whether there are significant changes within the retinal nerve fibre layer and ganglion cell layer in subjects after mTBI. A systematic review was carried out in accordance with PRISMA guidelines and registered with PROSPERO (Number: CRD42022360498). Four databases were searched for relevant literature published from inception until 1 September 2022. Abstracts and full texts were screened by three independent reviewers. Initial screening of databases yielded 341 publications, of these, three fulfilled all the criteria for inclusion. All three studies showed thinning of the retinal nerve fibre layer, whereas there were no significant changes in the ganglion cell layer. This systematic review demonstrated that thinning of the retinal nerve fibre layer (but not of the ganglion cell layer) is associated with mTBI. It provides preliminary evidence for the use of the retinal nerve fibre layer as a potential biomarker of damage to the visual system in mTBI. Further prospective longitudinal studies ensuring uniform diagnosis and accurate phenotyping of mTBI are needed to understand the effects on the visual system and potential of OCT as a prognostic biomarker.
Topics: Adult; Humans; Retinal Ganglion Cells; Tomography, Optical Coherence; Brain Concussion; Nerve Fibers; Biomarkers
PubMed: 38238577
DOI: 10.1038/s41433-023-02845-w -
Ophthalmic Research 2024Anterior ischemic optic neuropathy (AION) can mimic glaucoma and consequently cause difficulties in differential diagnosis. The purpose of this paper was to summarize... (Review)
Review
INTRODUCTION
Anterior ischemic optic neuropathy (AION) can mimic glaucoma and consequently cause difficulties in differential diagnosis. The purpose of this paper was to summarize differences in diagnostic tests that can help perform a correct diagnosis.
METHODS
The search strategy was performed according to the PRISMA 2009 guidelines, and four databases were used: MEDLINE, Embase, Web of Science, and Cochrane. Totally, 772 references were eligible; 39 were included after screening with respect to inclusion criteria that included English language and published in the 20 years before search date.
RESULTS
Ninety percent (n = 35) of included studies used optical coherence tomography (OCT). Glaucomatous eyes had a significantly greater cup area, volume and depth, cup-to-disk ratio, a lower rim volume and area, and a thinner Bruch's membrane opening-minimum rim width. Retinal nerve fiber layer (RNFL) thinning in glaucomatous eyes occurred primarily at the superotemporal, inferotemporal, and inferonasal sectors, while AION eyes demonstrated mostly superonasal thinning. Glaucoma eyes showed greater macular ganglion cell layer thickness, except at the inferotemporal sector. OCT angiography measurements demonstrated a significant decrease in superficial and deep macular vessel density (VD) in glaucoma compared to AION with similar degree of visual field damage; the parapapillary choroidal VD was spared in AION eyes compared to glaucomatous eyes.
CONCLUSION
By use of OCT imaging, optic nerve head parameters seem most informative to distinguish between glaucoma and AION. Although both diseases affect the RNFL thickness, it seems to do so in different sectors. Differences in structure and vascularity of the macula can also help in making the differential diagnosis.
Topics: Humans; Optic Neuropathy, Ischemic; Diagnosis, Differential; Tomography, Optical Coherence; Nerve Fibers; Retinal Ganglion Cells; Optic Disk; Glaucoma; Visual Fields; Intraocular Pressure
PubMed: 38262372
DOI: 10.1159/000535568 -
Journal of Traditional Chinese Medicine... Aug 2023To evaluate the effectiveness and safety of Xuebijing injection (XBJ) on coronavirus disease 2019 (COVID-19) in patients. (Meta-Analysis)
Meta-Analysis
OBJECTIVE
To evaluate the effectiveness and safety of Xuebijing injection (XBJ) on coronavirus disease 2019 (COVID-19) in patients.
METHODS
Related studies on multiple biological databases and websites were searched up to December 11, 2021 without language and publication time restrictions. Review Manager V.5.3 and Stata 14 software were used for data analysis.
RESULTS
Seven studies were finally included. The Metaanalysis showed that compared with the routine treatment alone, XBJ combined with the routine treatment can reduce the 28day mortality ( = 0.3, 95% : 0.12, 0.74), Creactive protein ( = -12.8, 95% : -23.13, 3.46), erythrocyte sedimentation rate ( = -9.32, 95% : -14.66, -3.98) and interleukin-6 (S = -0.6, 95% : -1.04, -0.17) levels and increase the leukocyte ( = 0.73, 95% : 0.42, 1.04) and lymphocyte count ( = 0.18, 95% : 0.07, 0.29) in peripheral blood; additionally, it has no obvious side effects ( = 1.11, 95% : 0.65, 1.9). There was no evidence that the XBJ combined therapy can improve the nucleic acid conversion rate and computed tomography improvement rate of COVID19 patients.
CONCLUSIONS
Preliminary evidence suggests that XBJ combined with routine treatment seems to be more effective than routine treatment for patients with COVID19. Limited by the number and quality of included papers, this finding still needs further validation by more studies.
Topics: Humans; COVID-19; Drugs, Chinese Herbal; Injections
PubMed: 37454247
DOI: 10.19852/j.cnki.jtcm.20230517.002 -
Penetration Enhancers for Topical Drug Delivery to the Ocular Posterior Segment-A Systematic Review.Pharmaceutics Feb 2021There is an unmet clinical need for eye drop formulations to efficiently treat the diseases of the posterior ocular segment by non-invasive topical administration. Here,... (Review)
Review
There is an unmet clinical need for eye drop formulations to efficiently treat the diseases of the posterior ocular segment by non-invasive topical administration. Here, we systematically reviewed the literature on ocular penetration enhancers and their ability to transfer drugs to the posterior segment of the eye in experimental studies. Our aim was to assess which penetration enhancer is the most efficient at delivering drugs to the posterior segment of the eye, when topically applied. We conducted a comprehensive search in three electronic databases (Ovid Embase, Ovid MEDLINE, and PubMed) to identify all the relevant manuscripts reported on ocular penetration enhancers based on the PRISMA guidelines. We identified 6540 records from our primary database search and filtered them per our inclusion/exclusion criteria to select a final list of 14 articles for qualitative synthesis. Of these, 11 studies used cell penetrating peptides (CPPs), 2 used chitosan, and 1 used benzalkonium chloride (BAC) as the penetration enhancer. Cationic and amphipathic CPPs, transactivator of transcription (TAT), and penetratin can be inferred to be the best among all the identified penetration enhancers for drug delivery to the fundus oculi via topical eye drop instillation. Further high-quality experimental studies are required to ascertain their quantitative efficacy.
PubMed: 33670762
DOI: 10.3390/pharmaceutics13020276 -
Plastic and Reconstructive Surgery.... Apr 2023There are over 43 million individuals in the world who are blind. As retinal ganglion cells are incapable of regeneration, treatment modalities for this condition are...
UNLABELLED
There are over 43 million individuals in the world who are blind. As retinal ganglion cells are incapable of regeneration, treatment modalities for this condition are limited. Since first incepted in 1885, whole-eye transplantation (WET) has been proposed as the ultimate cure for blindness. As the field evolves, different aspects of the surgery have been individually explored, including allograft viability, retinal survival, and optic nerve regeneration. Due to the paucity in the WET literature, we aimed to systematically review proposed WET surgical techniques to assess surgical feasibility. Additionally, we hope to identify barriers to future clinical application and potential ethical concerns that could be raised with surgery.
METHODS
We conducted a systematic review of PubMed, Embase, Cochrane Library, and Scopus from inception to June 10, 2022, to identify articles pertaining to WET. Data collection included model organisms studied, surgical techniques utilized, and postoperative functional outcomes.
RESULTS
Our results yielded 33 articles, including 14 mammalian and 19 cold-blooded models. In studies performing microvascular anastomosis in mammals, 96% of allografts survived after surgery. With nervous coaptation, 82.9% of retinas had positive electroretinogram signals after surgery, indicating functional retinal cells after transplantation. Results on optic nerve function were inconclusive. Ocular-motor functionality was rarely addressed.
CONCLUSIONS
Regarding allograft survival, WET appears feasible with no complications to the recipient recorded in previous literature. Functional restoration is potentially achievable with a demonstrated positive retinal survival in live models. Nevertheless, the potential of optic nerve regeneration remains undetermined.
PubMed: 37113307
DOI: 10.1097/GOX.0000000000004946 -
World Neurosurgery Jun 2022In this review, we appraised the current literature on the utility of optical coherence tomography (OCT) as a diagnostic and predictive factor for postoperative visual... (Meta-Analysis)
Meta-Analysis Review
BACKGROUND
In this review, we appraised the current literature on the utility of optical coherence tomography (OCT) as a diagnostic and predictive factor for postoperative visual function outcomes in patients with sellar/suprasellar lesions with chiasmal impingement.
METHODS
A systematic search of PubMed, CINAHL, Scopus, and Cochrane Library was conducted following PRISMA guidelines. Included studies described diagnostic or prognostic utility of OCT in patients with sellar/suprasellar lesions with chiasmal impingement. Meta-analysis was represented as mean difference (MD) with 95% confidence intervals. Meta-regression was performed to determine predictive factors of visual outcomes.
RESULTS
Forty-eight articles were identified for final pooled analysis, representing a total of 2435 patients with compressive sellar/suprasellar lesions and 952 healthy controls. Mean age was 43.3 (11.4) years, with 1494 (48.8%) male and 1566 (51.2%) female patients. Mean retinal nerve fiber layer (RNFL) was significantly different in the study population compared with healthy controls (75.8 μ [13.2] vs. 91.4 μ [10.8], P < 0.00001). The nasal segment of RNFL had the largest mean difference (MD -9.76 [-12.39, -7.13], P < 0.0001). Visual acuity, visual field mean deviation, and visual field pattern standard deviation all showed significant differences between the study population and healthy controls as well (P < 0.0001). Meta-regressions showed significant predictive capability of preoperative RNFL in determining visual function outcome (P < 0.05).
CONCLUSIONS
Our findings provide promising support for the growing evidence that OCT parameters can be utilized as both a diagnostic and prognostic tool for patients with compression of the optic apparatus. There is a need for further studies to gain a better understanding of OCTs and to improve patient outcomes.
Topics: Adult; Female; Humans; Male; Optic Chiasm; Prognosis; Retinal Ganglion Cells; Tomography, Optical Coherence; Visual Fields
PubMed: 35276393
DOI: 10.1016/j.wneu.2022.03.011 -
Journal of Neuro-ophthalmology : the... Mar 2022Inherited optic neuropathies (IONs) cause progressive irreversible visual loss in children and young adults. There are limited disease-modifying treatments, and most...
BACKGROUND
Inherited optic neuropathies (IONs) cause progressive irreversible visual loss in children and young adults. There are limited disease-modifying treatments, and most patients progress to become severely visually impaired, fulfilling the legal criteria for blind registration. The seminal discovery of the technique for reprogramming somatic nondividing cells into induced pluripotent stem cells (iPSCs) has opened several exciting opportunities in the field of ION research and treatment.
EVIDENCE ACQUISITION
A systematic review of the literature was conducted with PubMed using the following search terms: autosomal dominant optic atrophy, ADOA, dominant optic atrophy, DOA, Leber hereditary optic neuropathy, LHON, optic atrophy, induced pluripotent stem cell, iPSC, iPSC derived, iPS, stem cell, retinal ganglion cell, and RGC. Clinical trials were identified on the ClinicalTrials.gov website.
RESULTS
This review article is focused on disease modeling and the therapeutic strategies being explored with iPSC technologies for the 2 most common IONs, namely, dominant optic atrophy and Leber hereditary optic neuropathy. The rationale and translational advances for cell-based and gene-based therapies are explored, as well as opportunities for neuroprotection and drug screening.
CONCLUSIONS
iPSCs offer an elegant, patient-focused solution to the investigation of the genetic defects and disease mechanisms underpinning IONs. Furthermore, this group of disorders is uniquely amenable to both the disease modeling capability and the therapeutic potential that iPSCs offer. This fast-moving area will remain at the forefront of both basic and translational ION research in the coming years, with the potential to accelerate the development of effective therapies for patients affected with these blinding diseases.
Topics: Child; Humans; Induced Pluripotent Stem Cells; Ions; Optic Atrophy, Autosomal Dominant; Optic Atrophy, Hereditary, Leber; Optic Nerve Diseases; Young Adult
PubMed: 34629400
DOI: 10.1097/WNO.0000000000001375 -
Frontiers in Neurology 2020To investigate the application of optical coherence tomography angiography (OCTA) in cerebral small vessel disease (SVD), ischemic stroke and dementia. We conducted a...
To investigate the application of optical coherence tomography angiography (OCTA) in cerebral small vessel disease (SVD), ischemic stroke and dementia. We conducted a systematic search in MEDLINE (from inception) and EMBASE (from 1980) to end 2019 for human studies that measured retinal parameters in cerebral SVD, ischemic stroke, and dementia using OCTA. Fourteen articles ( = 989) provided relevant data. Ten studies included patients with Alzheimer disease (AD) and mild cognitive impairment ( = 679), two investigated pre-symptomatic AD participants ( = 154), and two investigated monogenic SVD patients with cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy ( = 32) and Fabry disease ( = 124). Methods to reduce bias and risk factor adjustment were poorly reported. Substantial methodological variations between studies precluded a formal meta-analysis. Quantitative measurements revealed significant yet inconclusive changes in foveal avascular zone, perfusion density, and vessel density (VD) in AD, presymptomatic AD, and SVD patients. Two ( = 160) of three studies ( = 192) showed association between decreased VD and increased white matter hyperintensities. In three ( = 297) of seven studies ( = 563), better cognitive function was associated with increased VD. One study ( = 52) suggested increased VD was associated with increased ganglion cell-inner plexiform layer thickness in AD yet with no covariate adjustment. Changes in retinal microvasculature identified using OCTA are associated with monogenic SVD and different stages of AD, but data are limited and partly confounded by methodological differences. Larger studies with risk factors adjustment and more consistent OCTA methods are needed to fully exploit this technology. CRD42020166929.
PubMed: 33013667
DOI: 10.3389/fneur.2020.01009 -
European Journal of Neurology Mar 2021Retinal pathological changes may precede or accompany the deterioration of brain tissue in Parkinson's disease (PD). The purpose of this meta-analysis was to assess the... (Meta-Analysis)
Meta-Analysis
BACKGROUND AND PURPOSE
Retinal pathological changes may precede or accompany the deterioration of brain tissue in Parkinson's disease (PD). The purpose of this meta-analysis was to assess the usefulness of optical coherence tomography (OCT) measurements as potential imaging biomarkers for PD.
METHODS
PubMed, Embase, Web of Science and Cochrane Library databases were systematically searched for observational studies (published prior to 30 May 2020) comparing the OCT measurements between PD patients and healthy controls (HCs). Our main end-points were peripapillary retinal nerve fiber layer (pRNFL) thickness, macular ganglion cell complex thickness, macular thickness and macular volume. Pooled data were assessed by use of a random-effects model.
RESULTS
A total of 36 observational studies were identified that included 1712 patients with PD (2548 eyes) and 1778 HCs (2646 eyes). Compared with the HC group, the PD group showed a significant reduction in mean pRNFL thickness (weighted mean difference [WMD] -3.51 μm, 95% confidence interval [CI] -4.84, -2.18; p = 0.000), all quadrants at the pRNFL (WMD range -7.65 to -2.44 μm, all p < 0.05), macular fovea thickness (WMD -5.62 μm, 95% CI -7.37, -3.87; p = 0.000), all outer sector thicknesses at the macula (WMD range -4.68 to -4.10 μm, all p < 0.05), macular volume (WMD -0.21 mm , 95% CI -0.36, -0.06; p < 0.05) and macular ganglion cell complex thickness (WMD -4.18 μm, 95% CI -6.07, -2.29; p < 0.05).
CONCLUSIONS
Our pooled data confirmed robust associations between retinal OCT measurements and PD, highlighting the usefulness of OCT measurements as potential imaging biomarkers for PD.
Topics: Biomarkers; Cross-Sectional Studies; Humans; Nerve Fibers; Parkinson Disease; Retinal Ganglion Cells; Tomography, Optical Coherence
PubMed: 33107159
DOI: 10.1111/ene.14613