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The aim of the present review is to highlight the strengths and limitations of echocardiographic parameters and scores employed to predict favorable outcome in complex congenital heart diseases (CHDs) with borderline right ventricle (RV), with a focus on pulmonary atresia with intact ventricular septum and critical pulmonary stenosis (PAIVS/CPS). A systematic search in the National Library of Medicine using Medical Subject Headings and free-text terms including echocardiography, CHD, and scores, was performed. The search was refined by adding keywords "PAIVS/CPS", Ebstein's anomaly, and unbalanced atrioventricular septal defect with left dominance. A total of 22 studies were selected for final analysis; 12 of them were focused on parameters to predict biventricular repair (BVR)/pulmonary blood flow augmentation in PAIVS/CPS. All of these studies presented numerical (the limited sample size) and methodological limitations (retrospective design, poor definition of inclusion/exclusion criteria, variability in the definition of outcomes, differences in adopted surgical and interventional strategies). There was heterogeneity in the echocardiographic parameters employed and cut-off values proposed, with difficultly in establishing which one should be recommended. Easy scores such as TV/MV (tricuspid/mitral valve) and RV/LV (right/left ventricle) ratios were proven to have a good prognostic accuracy; however, the data were very limited (only two studies with <40 subjects). In larger studies, RV end-diastolic area and a higher degree of tricuspid regurgitation were also proven as accurate predictors of successful BVR. These measures, however, may be either operator and/or load/pressure dependent. TV Z-scores have been proposed by several authors, but old and heterogenous nomograms sources have been employed, thus producing discordant results. In summary, we provide a review of the currently available echocardiographic parameters for risk prediction in CHDs with a diminutive RV that may serve as a guide for use in clinical practice.
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The majority of patients born with congenital heart disease (CHD) need lifelong surveillance with serial clinical attendance and examinations. However, loss of follow-up (namely no documented follow-up for 3 years or more) is a recognised common problem since it is often related to remarkable worsening in the health of CHD patients with increased morbidity and mortality. Transitioning from paediatric to adult care has proven to be the most vulnerable point in the care of these subjects. As such, a systematic review was carried out to ask the following questions: What is the percentage of loss of follow-up worldwide? Are there regional fluctuations in the percentage? Is there a link between loss of follow-up and the complexity of CHD? What strategies should be employed to lower the risk of discontinuity in care? The most recent worldwide averaged loss of follow-up is 26.1%, with significant fluctuations across continents and countries. This percentage is even higher (31.9%) when one includes all untraceable patients, presuming that they are not having any cardiac follow-up. The highest discontinuity of care was reported in the USA and in patients with simple CHD. Planning the rules of transition seems to be one of the most reliable tools to minimise the number of CHD patients who are lost in transition. Recalling patients, with general practitioners who are crucial in readdressing half of the lost to follow-up CHD patients to adult CHD specialists, and a good relationship between paediatric cardiologists and the adult CHD team are two other valuable strategies in aiding successful transition.
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INTRODUCTION: Paediatric pulmonary hypertension (PH) represents a heterogeneous illness that is responsible for high morbidity and mortality if left without treatment. Idiopathic pulmonary arterial hypertension (IPAH) is a subtype of PAH rarely seen in paediatrics. Limited long-term data are available. METHODS: Over a period of 20 years, 10 paediatric patients were enrolled at two tertiary centres. Their clinical, echocardiographic, and right heart catheterisation (RHC) features and outcome were evaluated. RESULTS: The mean age at first diagnosis was 5.7 ± 5.7 years. The age at the last follow-up was 12.4 ± 6.1 years. The average follow-up was 6.6 ± 0.8 years. There was a female prevalence of 60% (p < 0.05) in this case series. Regarding the NYHA functional class, 80% of IPAH subjects were in class III or IV. The mean saturation was 91 ± 5%. In this regard, 70% of the patients were on a combination of three drugs, with sildenafil (90%) included. On echocardiography, longitudinal right ventricular contractility (TAPSE) was slightly reduced (13.4 ± 2.6 mm), whilst RVSP was severely elevated (101 ± 19 mmHg). The RHC data showed that mPAP was 61.8 ± 23.1 mmHg (p = 0.0017 with RVSP on echocardiography), mRAP was 10.7 ± 3.8 mmHg, CI was 2.6 ± 1 L·min-1·m-2, PVRi was 16.8 ± 12.6 WU·m2, and SVO2 was 63.6 ± 14.8%. Regarding the outcome, two male IPAH patients (20%) died, and 50% underwent lung transplant or were on transplant assessment or already on the waiting list for lung transplantation. One patient underwent a ductus arteriosus stenting (reverse Potts shunt) and another underwent atrial septostomy and stenting. CONCLUSIONS: Notwithstanding the progress in medical therapy, IPAH continues to represent a serious challenge, particularly in the paediatric population, with the need for lung transplantation and significant mortality.
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At some point in their life, adolescent patients with a congenital heart disease (CHD) transition from paediatric services to adult care facilities. The process is not without any risks, as it is often linked with a significantly progressive deterioration in adolescents' health and loss of follow-up. In fact, transition patients often encounter troubles in finding a care giver who is comfortable managing their condition, or in re-establishing trust with the new care provider. Planning the rules of transition is pivotal in preventing these risks. Unfortunately, the American and European guidelines on CHD provide just generic statements about transition. In a recently published worldwide inter-societies consensus document, a hybrid model of transition, which should be adapted for use in high- and low- resource settings, has been suggested. Currently, in literature there are a few models of transition for CHD patients, but they are by far local models and cannot be generalized to other regions or countries. This paper describes the Irish model for transition of care of CHD patients. Due to the peculiarity of the healthcare organization in the Republic of Ireland, which is centralized with one main referral centre for paediatric cardiology (in Dublin, with a few smaller satellite centres all around, according to the "hub and spoke" model) and one centre for adult with CHD (in Dublin), the model can be considered as a national one and the first to be released in the old continent.
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Cardiología , Cardiopatías Congénitas , Transición a la Atención de Adultos , Adulto , Niño , Adolescente , Humanos , Cardiopatías Congénitas/terapiaRESUMEN
The aim of this review is to highlight the strengths and limitations of major echocardiographic biventricular repair (BVR) prediction models for borderline left ventricle (LV) in complex congenital heart disease (CHD). A systematic search in the National Library of Medicine for Medical Subject Headings and free text terms including echocardiography, CHD, and scores, was performed. The search was refined by adding keywords for critical aortic stenosis (AS), borderline LV, complex left ventricular outflow tract (LVOT) obstruction, hypoplastic left heart syndrome/complex (HLHS/HLHC), and unbalanced atrio-ventricular septal defects (uAVSD). Fifteen studies were selected for the final analysis. We outlined what echocardiographic scores for different types of complex CHD with diminutive LV are available. Scores for CHD with LVOT obstruction including critical AS, HLHS/HLHC, and aortic arch hypoplasia have been validated and implemented by several studies. Scores for uAVSD with right ventricle (RV) dominance have also been established and implemented, the first being the atrioventricular valve index (AVVI). In addition to AVII, both LV/RV inflow angle and LV inflow index have all been validated for the prediction of BVR. We conclude with a discussion of limitations in the development and validation of each of these scores, including retrospective design during score development, heterogeneity in echocardiographic parameters evaluated, variability in the definition of outcomes, differences in adopted surgical and Interventional strategies, and institutional differences. Furthermore, scores developed in the past two decades may have little clinical relevance now. In summary, we provide a review of echocardiographic scores for BVR in complex CHD with a diminutive LV that may serve as a guide for use in modern clinical practice.
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Estenosis de la Válvula Aórtica , Cardiopatías Congénitas , Obstrucción del Flujo de Salida Ventricular Izquierda , Humanos , Ventrículos Cardíacos , Estudios Retrospectivos , Cardiopatías Congénitas/complicaciones , Cardiopatías Congénitas/cirugía , EcocardiografíaRESUMEN
Acid-catalyzed hydrocarbon transformations are essential for industrial processes, including oligomerization, cracking, alkylation, and aromatization. However, these chemistries are extremely complex, and computational (automatic) reaction network generation is required to capture these intricacies. The approach relies on the concept that underlying mechanisms for the transformations can be described by a limited number of reaction families applied to various species, with both gaseous and protonated intermediate species tracked. Detailed reaction networks can then be tailored to each industrially relevant process for better understanding or for application in kinetic modeling, which is demonstrated here. However, we show that these networks can grow very large (thousands of species) when they are bound by typical carbon number and rank criteria, and lumping strategies are required to decrease computational expense. For acid-catalyzed hydrocarbon transformations, we propose lumping isomers based on carbon number, branch number, and ion position to reach high carbon limits while maintaining the high resolution of species. Two case studies on propene oligomerization verified the lumping technique in matching a fully detailed model as well as experimental data.
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Virtual reality (VR) is a relatively new technology that allows an individual to experience a virtual world. This new immersive video type may be of particular usefulness in procedure-based healthcare settings. We hypothesized that VR echocardiography was non-inferior to live demonstration. Our aim was to assess the usefulness of a VR echocardiographic approach in teaching echocardiography to pediatric trainees compared to live demonstration. This was a single center, cross-sectional observational design. We used a Garmin VIRB® 360 and a head-mount display to record live echocardiography exams in a pediatric population. An Oculus Go™ was used to view the 360° immersive/VR videos. Trainees responded to a written questionnaire afterwards. Fifteen trainees participated in the study, each of whom had previously seen echocardiography through live demonstration teaching. Eleven respondents had previous hands-on echocardiography experience. All 15 participants confirmed that VR echocardiography is a useful teaching tool with 87% (n = 13) rating it as good or very good on a 5-point Likert scale. When asked to compare VR to live demonstration, 67% (n = 10) rated VR echocardiography as the same or better than live demonstration. One of the participants reported a side effect, namely mild and self-resolving dizziness. VR echocardiography is a safe, inexpensive and practical way for trainees to learn echocardiography. The addition of VR echocardiography to the arsenal of teaching tools may enrich the learning experience for trainees.
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Ecocardiografía/métodos , Educación Médica/métodos , Realidad Virtual , Estudios Transversales , Mareo/epidemiología , Femenino , Humanos , Masculino , Pediatría/educación , Encuestas y CuestionariosRESUMEN
BACKGROUND: The aim of the study was to document cardiovascular clinical findings, cardiac imaging, and laboratory markers in children presenting with the novel multisystem inflammatory syndrome associated with coronavirus disease 2019 (COVID-19) infection. METHODS: This real-time internet-based survey has been endorsed by the Association for European Paediatric and Congenital Cardiologists Working Groups for Cardiac Imaging and Cardiovascular Intensive Care. Children 0 to 18 years of age admitted to a hospital between February 1 and June 6, 2020, with a diagnosis of an inflammatory syndrome and acute cardiovascular complications were included. RESULTS: A total of 286 children from 55 centers in 17 European countries were included. The median age was 8.4 years (interquartile range, 3.8-12.4 years) and 67% were boys. The most common cardiovascular complications were shock, cardiac arrhythmias, pericardial effusion, and coronary artery dilatation. Reduced left ventricular ejection fraction was present in over half of the patients, and a vast majority of children had raised cardiac troponin when checked. The biochemical markers of inflammation were raised in most patients on admission: elevated C-reactive protein, serum ferritin, procalcitonin, N-terminal pro B-type natriuretic peptide, interleukin-6 level, and D-dimers. There was a statistically significant correlation between degree of elevation in cardiac and biochemical parameters and the need for intensive care support (P<0.05). Polymerase chain reaction for severe acute respiratory syndrome coronavirus 2 was positive in 33.6%, whereas immunoglobulin M and immunoglobulin G antibodies were positive in 15.7% cases and immunoglobulin G in 43.6% cases, respectively, when checked. One child in the study cohort died. CONCLUSIONS: Cardiac involvement is common in children with multisystem inflammatory syndrome associated with the Covid-19 pandemic. The majority of children have significantly raised levels of N-terminal pro B-type natriuretic peptide, ferritin, D-dimers, and cardiac troponin in addition to high C-reactive protein and procalcitonin levels. In comparison with adults with COVID-19, mortality in children with multisystem inflammatory syndrome associated with COVID-19 is uncommon despite multisystem involvement, very elevated inflammatory markers, and the need for intensive care support.
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Arritmias Cardíacas , COVID-19 , Derrame Pericárdico , SARS-CoV-2 , Choque , Síndrome de Respuesta Inflamatoria Sistémica , Adolescente , Anticuerpos Antivirales/sangre , Arritmias Cardíacas/sangre , Arritmias Cardíacas/epidemiología , Arritmias Cardíacas/etiología , Arritmias Cardíacas/terapia , Biomarcadores/sangre , Proteína C-Reactiva/metabolismo , COVID-19/sangre , COVID-19/complicaciones , COVID-19/epidemiología , COVID-19/terapia , Niño , Preescolar , Europa (Continente)/epidemiología , Femenino , Ferritinas/sangre , Productos de Degradación de Fibrina-Fibrinógeno/metabolismo , Humanos , Inmunoglobulina G/sangre , Inmunoglobulina M/sangre , Lactante , Interleucina-6/sangre , Masculino , Péptido Natriurético Encefálico/sangre , Pandemias , Fragmentos de Péptidos/sangre , Derrame Pericárdico/sangre , Derrame Pericárdico/epidemiología , Derrame Pericárdico/etiología , Derrame Pericárdico/terapia , Choque/sangre , Choque/epidemiología , Choque/etiología , Choque/terapia , Síndrome de Respuesta Inflamatoria Sistémica/sangre , Síndrome de Respuesta Inflamatoria Sistémica/complicaciones , Síndrome de Respuesta Inflamatoria Sistémica/epidemiología , Síndrome de Respuesta Inflamatoria Sistémica/terapiaRESUMEN
OBJECTIVE(S): The Fontan procedure is a common palliative intervention for sufferers of single ventricle congenital heart defects that results in an anastomosis of the venous return to the pulmonary arteries called the total cavopulmonary connection (TCPC). In patients with palliated single ventricular heart defects, the Fontan circulation passively directs systemic venous return to the pulmonary circulation in the absence of a functional sub-pulmonary ventricle. Therefore, the Fontan circulation is highly dependent on favourable flow and energetics, and minimal energy loss is of great importance. The majority of in vitro studies, to date, employ a rigid TCPC model. Recently, few studies have incorporated flexible TCPC models, without the inclusion of commercially available conduits used in these surgical scenarios. METHOD: The methodology set out in this study successfully utilizes patient-specific phantoms along with the corresponding flowrate waveforms to characterise the flow haemodynamic performance of extracardiac Gore-Tex conduits. This was achieved by comparing a rigid and flexible TCPC models against a flexible model with an integrated Gore-Tex conduit. RESULTS: The flexible model with the integrated Gore-Tex graft exhibited greater levels of energy losses when compared to the rigid walled model. With this, the flow fields showed greater levels of turbulence in the complaint and Gore-Tex models compared to the rigid model under ultrasound analysis. CONCLUSION: This study shows that vessel compliance along with the incorporation of Gore-Tex extracardiac conduits have significant impact on the flow haemodynamics in a patient-specific surgical scenario.
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Prótesis Vascular , Hemodinámica , Politetrafluoroetileno , Preescolar , Procedimiento de Fontan/instrumentación , Cardiopatías Congénitas/cirugía , Humanos , Técnicas In Vitro , Masculino , Diseño de Prótesis , Arteria Pulmonar/cirugía , Venas Cavas/cirugíaRESUMEN
BACKGROUND: Malignant pleural effusions are a serious complication of many late stage cancers that adversely affect quality of life. Pleurodesis with talc slurry is a standard treatment option, but clinical failures occur, possible due to poor talc delivery. A novel drug-delivery system was developed that fills the entire thoracic cavity with a liquid foam containing talc. The foam is designed to gel and adhere to the tissue walls at body temperature, to improve talc deposition and efficacy. METHODS: Rheology, foam stability, and ex-vivo coating and bio-adhesion studies were performed on three concentrations of a novel hydrogel talc foam system that was developed to improve delivery of talc to the pleural surfaces. A New Zealand rabbit model of pleurodesis was used to evaluate effectiveness of the foams at inducing adhesion formation and compared to talc slurry. The rabbits were recovered after they had one of the test agents instilled into their pleura, and then sacrificed after 28 days. Pleurodesis was assessed by a blinded pathologist using a standardized pathological scoring system. RESULTS: All talc foam formulations produced foams that gelled at physiological temperatures and were relatively stable for at least two hours. As the concentration of the formulation increased the gelation temperature decreased and the foam adhesiveness increased. Rabbits that received talc foam had significantly greater adhesion formation than talc slurry (mean score of 2.21 vs. 1.18 (p < 0.05)). Rabbits that received the 20% foam developed the most adhesions. CONCLUSIONS: This study demonstrates that our triblock copolymer hydrogel foam delivery system enhances adhesion formation in an experimental model. This novel approach can have important clinical impact, potentially improving efficacy of existing therapies and reducing the need for more invasive treatments.
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Hidrogeles , Derrame Pleural Maligno/tratamiento farmacológico , Pleurodesia/métodos , Talco/administración & dosificación , Animales , Sistemas de Liberación de Medicamentos , Masculino , Conejos , Talco/uso terapéutico , Adherencias Tisulares/inducido químicamenteRESUMEN
Recurrent herpes simplex keratitis (HSK) is a leading infectious cause of blindness in industrialized countries. Antiviral prophylaxis (AVP) may fail to prevent recurrence of HSK due to viral resistance, inadequate dosing, or poor patient compliance. In this prospective multicenter study, we enrolled immunocompetent patients with recurrent HSK despite AVP. Ocular samples were tested by PCR for herpes simplex virus 1 (HSV-1). HSV-1 drug resistance was assessed with a genotypic assay based on UL23 and UL30 gene sequencing. After curative full dose valacyclovir (VACV) treatment was started, peak and trough acyclovir (ACV) plasma concentrations were measured, and patient compliance to AVP was assessed with a questionnaire. The study sample was comprised of 43 patients. Six (14%) patients were positive for HSV-1 using PCR, of whom 5 (83%) harbored genotypically ACV-resistant (ACVR) virus, due to mutations in UL23 (n = 4) or UL30 (n = 1). Disease duration was statistically significantly longer in patients with viral resistance compared to other HSK patients [35.5 ± 23.4 years (range, 6.8-68.4 years) versus 11.1 ± 12.3 years (range, 0.8-56.3 year) respectively; Mann-Whitney p = 0.01)]. While patients were treated with full dose VACV, trough ACV plasma concentrations were below the threshold for ACV sensitivity in 9.5% of cases, and compliance was poor in 5.3% of cases. To summarize, HSV-1 resistance to ACV seems to be a significant cause of failure of prophylaxis in patients with HSK and is associated with longer disease duration. Most PCR-positive samples contained genotypically ACVR virus and identification may aid in adapting treatment. Incomplete 24-h drug coverage may also explain some cases of failure of prophylaxis.
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Antivirales/administración & dosificación , Antivirales/sangre , Herpesvirus Humano 1/efectos de los fármacos , Queratitis Herpética/virología , Aciclovir/administración & dosificación , Aciclovir/análogos & derivados , Aciclovir/sangre , Aciclovir/uso terapéutico , Adolescente , Adulto , Anciano , Antivirales/uso terapéutico , Niño , Preescolar , Farmacorresistencia Viral/genética , Femenino , Herpes Simple/tratamiento farmacológico , Herpes Simple/virología , Herpesvirus Humano 1/genética , Herpesvirus Humano 1/aislamiento & purificación , Humanos , Lactante , Queratitis Herpética/tratamiento farmacológico , Queratitis Herpética/epidemiología , Queratitis Herpética/etiología , Masculino , Persona de Mediana Edad , Reacción en Cadena de la Polimerasa , Estudios Prospectivos , Recurrencia , Lágrimas/virología , Valaciclovir , Valina/administración & dosificación , Valina/análogos & derivados , Valina/uso terapéutico , Adulto JovenRESUMEN
PURPOSE: To assess the quality of life in French keratoconus patients. SETTING: Fifty-seven Keratoconus National Reference Centers across France. DESIGN: Prospective case series. METHODS: Patients completed the National Eye Institute Visual Functioning Questionnaire-25 (NEI VFQ-25) and a French validated questionnaire on disability and dependency from February to June 2012 when they came for an ophthalmic examination at 57 participating centers across France. An ocular examination including refraction, corneal topography, pachymetry, and slitlamp biomicroscopy was performed. The composite or global NEI VFQ-25 score and the proportion of patients who were dependent (defined by the difficulties with activities of daily living) because of keratoconus were the main evaluation criteria in this study. RESULTS: The study comprised 550 keratoconus patients. Women, corrected distance visual acuity worse than 20/40, steep keratometry higher than 52.0 diopters, history of surgery (corneal transplant, intrastromal corneal ring segments, or corneal crosslinking), and more severe keratoconus according to the Amsler-Krumeich classification were associated with an increasingly negative impact on quality of life (overall scores are significantly lower). Moreover, 4.9% of participants reported having changed their jobs because of keratoconus and 7.8% received keratoconus-related disability. Sixty-nine (12.5%) patients reported having difficulties with activities of daily living and are considered dependent. CONCLUSION: Keratoconus was associated with a significant reduction in quality of life but it did not result in social exclusion.
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Queratocono , Calidad de Vida , Actividades Cotidianas , Francia , Humanos , Queratocono/cirugía , Estudios Prospectivos , Prótesis e Implantes , Visión Ocular , Agudeza VisualRESUMEN
BACKGROUND/AIMS: To compare the efficacy and safety of intracameral (IC) administration at the beginning of cataract surgery, of Mydrane, a standardised ophthalmic combination of tropicamide 0.02%, phenylephrine 0.31% and lidocaine 1%, to a standard topical regimen. METHODS: In this international phase III, prospective, randomised study, the selected eye of 555 patients undergoing phacoemulsification with intraocular lens (IOL) implantation received 200â µL of Mydrane (Mydrane group) just after the first incision or a topical regimen of one drop each of tropicamide 0.5% and phenylephrine 10% repeated three times (reference group). The primary efficacy variable was achievement of capsulorhexis without additional mydriatics. The non-inferiority of Mydrane to the topical regimen was tested. The main outcome measures were pupil size, patient perception of ocular discomfort and safety. RESULTS: Capsulorhexis without additional mydriatics was performed in 98.9% of patients and 94.7% in the Mydrane and reference groups, respectively. Both groups achieved adequate mydriasis (>7â mm) during capsulorhexis, phacoemulsification and IOL insertion. IOL insertion was classified as 'routine' in a statistically greater number of eyes in the Mydrane group compared with the reference group (p=0.047). Patients in the Mydrane group reported statistically greater comfort than the reference group before IOL insertion (p=0.034). Safety data were similar between groups. CONCLUSIONS: Mydrane is an effective and safe alternative to standard eye drops for initiating and maintaining intraoperative mydriasis and analgesia. Patients who received IC Mydrane were significantly more comfortable before IOL insertion than the reference group. Surgeons found IOL insertion less technically challenging with IC Mydrane. TRIAL REGISTRATION NUMBER: NCT02101359; Results.
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Lidocaína/administración & dosificación , Midriasis/inducido químicamente , Facoemulsificación/métodos , Fenilefrina/administración & dosificación , Tropicamida/administración & dosificación , Adulto , Anciano , Anciano de 80 o más Años , Anestésicos Locales/administración & dosificación , Relación Dosis-Respuesta a Droga , Quimioterapia Combinada , Femenino , Estudios de Seguimiento , Humanos , Implantación de Lentes Intraoculares/métodos , Masculino , Persona de Mediana Edad , Midriáticos/administración & dosificación , Soluciones Oftálmicas , Satisfacción del Paciente , Estudios Prospectivos , Factores de Tiempo , Resultado del TratamientoRESUMEN
PURPOSE: The primary intent of total knee arthroplasty is the restoration of normal knee kinematics, with ligamentous constraint being a key influential factor. Displacement of the joint line may lead to alterations in ligament attachment sites relative to knee flexion axis and variance of ligamentous constraints on tibiofemoral movement. This study aimed to investigate collaterals strains and tibiofemoral kinematics with different joint line levels. METHODS: A previously validated knee model was employed to analyse the change in length of the collateral ligaments and tibiofemoral motion during knee flexion. The models shifted the joint line by 3 and 5 mm both proximally and distally from the anatomical level. The data were captured from full extension to flexion 135°. RESULTS: The elevated joint line revealed a relative increase in distance between ligament attachments for both collateral ligaments in comparison with the anatomical model. Also, tibiofemoral movement decreased with an elevation in the joint line. Conversely, lowering the joint line led to a significant decrease in distance between ligament attachments, but greater tibiofemoral motion. CONCLUSION: Elevation of the joint line would strengthen the capacity of collateral ligaments for knee motion constraint, whereas a distally shifted joint line might have the advantage of improving tibiofemoral movement by slackening the collaterals. It implies that surgeons can appropriately change the joint line position in accordance with patient's requirement or collateral tensions. A lowered joint line level may improve knee kinematics, whereas joint line elevation could be useful to maintain knee stability. LEVEL OF EVIDENCE: V.
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Artroplastia de Reemplazo de Rodilla , Ligamentos Colaterales/cirugía , Movimiento/fisiología , Rango del Movimiento Articular/fisiología , Fenómenos Biomecánicos , Humanos , Articulación de la Rodilla/cirugía , Modelos Anatómicos , Músculo Esquelético/cirugíaRESUMEN
It has been widely reported that the tear film, which is crucially important as a protective barrier of the eye, undergoes biochemical changes as a result of a wide range of ocular pathology. This tends to suggest the possibility of early detection of ocular diseases on the basis of biochemical analysis of tears. However, studies of tears by conventional methods of biomolecular and biochemical analysis are often limited by methodological difficulties. Moreover, such analysis could not be applied in the clinic, where structural and morphological analyses by, mainly, slit-lamp biomicroscopy remains the recommended method. In this study, we assessed, for the first time, the potential of FTIR spectroscopy combined with advanced chemometric processing of spectral data for analysis of raw tears for diagnosis purposes. We first optimized sampling and spectral acquisition (tears collection method, tear sample volume, and preservation of the samples) for accurate spectral measurement. On the basis of the results, we focused our study on the possibility of discriminating tears from normal individuals from those of patients with different ocular pathologies, and showed that the most discriminating spectral range is that corresponding to variations of CH2 and CH3 of lipid aliphatic chains. We also report more subtle discrimination of tears from patients with keratoconus and those from patients with non-specific inflammatory ocular diseases, on the basis of variations in spectral ranges attributed notably to lipid and carbohydrate vibrations. Finally, we also succeeded in distinguishing tears from patients with early-stage and late-stage keratoconus on the basis of spectral features attributed to protein structure. Therefore, this study strongly suggests that FTIR spectral analysis of tears could be developed as a valuable and cost-saving tool for biochemical-based detection of ocular diseases, potentially before the appearance of the first morphological signs of diseases. Combined with supervised modelling methods and with use of a spectral data base acquired for representative patients, such a spectral approach could be a useful addition to current methods of clinical analysis for improvement of patient care.
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Oftalmopatías/diagnóstico , Espectroscopía Infrarroja por Transformada de Fourier/métodos , Lágrimas/química , Adulto , Anciano , Femenino , Humanos , Lípidos/química , Masculino , Persona de Mediana Edad , Adulto JovenRESUMEN
PURPOSE: To describe dry eye disease in French elderly subjects. METHODS: The Alienor Study is a population-based study on age-related eye disease in 963 residents of Bordeaux (France), aged 73 years or more. Self-reported dry eye disease and use of artificial tears were documented through face-to-face interview. Dry eye symptoms were assessed using the Ocular Surface Disease Index (OSDI) questionnaire and tear film stability by tear break-up time measurements (TBUT). Definite dry eye disease was defined as self-reported dry eye, confirmed by use of artificial tears and/or OSDI greater or equal to 22. RESULTS: Nine hundred and fifteen subjects, with mean age of 80 ± 4 years, returned the OSDI questionnaire. Of these, 271 (29.6%) subjects reported a dry eye disease and 135 (14.7%) were using artificial tears. An OSDI score > 22 was found in 359 (39.2%) subjects and a TBUT < 5 seconds in 335/746 (44.9%) subjects. Overall, definite dry eye affected 21.9% of subjects and was more frequent in women (27.1%) than in men (13.6%). After multivariate adjustment, dry eye disease was also significantly less frequent in subjects with high educational level (odds ratio (OR) = 0.49, 95% confidence interval (CI): 0.31-0.78 for long secondary school) and more frequent in subjects with ocular hypertension (OR = 1.61, 95% CI: 1.02-2.57) and those using anxiolytics (OR = 1.53, 95% CI: 1.02-2.29). CONCLUSIONS: This large observational study confirmed the high prevalence of dry eye symptoms among elderly subjects and confirmed some of the previously identified risk factors (in particular female gender and use of anxiolytics).
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Síndromes de Ojo Seco/epidemiología , Distribución por Edad , Anciano , Anciano de 80 o más Años , Síndromes de Ojo Seco/diagnóstico , Síndromes de Ojo Seco/tratamiento farmacológico , Escolaridad , Femenino , Francia/epidemiología , Humanos , Gotas Lubricantes para Ojos/administración & dosificación , Masculino , Prevalencia , Distribución por Sexo , Encuestas y Cuestionarios , Población Blanca/estadística & datos numéricosRESUMEN
OBJECTIVE: To determine whether severe intraoperative floppy iris syndrome (IFIS) is more or equally likely with tamsulosin or alfuzosin. DESIGN: Prospective, masked, multicenter, cross-sectional study. PARTICIPANTS AND CONTROLS: Consecutive patients taking systemic tamsulosin or alfuzosin and scheduled for routine cataract surgery (case group) and patients with no history of systemic α1-antagonists scheduled for routine cataract surgery (control group). METHODS: Phacoemulsification with intraocular lens implantation was performed and recorded on video. Intracameral phenylephrine or epinephrine, either by direct injection or placement in the irrigation bottle, was not permitted. Every surgical video subsequently was reviewed remotely by 2 masked investigators who diagnosed the presence or absence of IFIS and graded the severity of IFIS as follows: none, mild (billowing only), moderate (billowing and either iris prolapse or ≥2 mm of pupil constriction), or severe (billowing accompanied by iris prolapse and ≥2 mm of pupil constriction). MAIN OUTCOME MEASURES: Rate and severity of IFIS and surgical complication rate. RESULTS: A total of 226 eyes (70 in the tamsulosin group, 43 in the alfuzosin group, and 113 in the control group) were enrolled. Severe IFIS was noted in 34.3% (24/70) of the tamsulosin eyes and in 16.3% (7/43) of the alfuzosin eyes compared with 4.4% (5/113) of the control eyes. The differences between each of the 3 groups were statistically significant. In the absence of epinephrine in the irrigation bottle, 12.4% of control eyes had moderate to severe IFIS. There were no instances of posterior capsular rupture or significant surgical complications in either the case or control groups. CONCLUSIONS: Moderate to severe IFIS can occur in low-risk eyes when epinephrine is omitted from the irrigation bottle. Although both tamsulosin and alfuzosin significantly increase the risk of IFIS compared with patients without prior α1-antagonist intake, severe IFIS statistically was more likely with tamsulosin than with alfuzosin (P = 0.036). Patients with symptomatic benign prostatic hyperplasia and cataracts requiring a uroselective α1-antagonist may consider trying alfuzosin first.
Asunto(s)
Antagonistas de Receptores Adrenérgicos alfa 1/efectos adversos , Complicaciones Intraoperatorias , Enfermedades del Iris/inducido químicamente , Pupila/efectos de los fármacos , Quinazolinas/efectos adversos , Sulfonamidas/efectos adversos , Anciano , Estudios Transversales , Método Doble Ciego , Humanos , Enfermedades del Iris/diagnóstico , Implantación de Lentes Intraoculares , Masculino , Facoemulsificación , Prolapso , Estudios Prospectivos , Hiperplasia Prostática/tratamiento farmacológico , Factores de Riesgo , Índice de Severidad de la Enfermedad , Tamsulosina , Grabación en VideoRESUMEN
PURPOSE: To analyse risk factors and visual performances of glaucomatous eyes with glistening in the intra-ocular lens (IOL). METHODS: Prospective study performed between November 2010 and April 2011 and involving 67 consecutive glaucomatous eyes (47 patients), who previously had a phacoemulsification with a hydrophobic acrylic IOL implanted in the capsular bag. Glistening was classified in three groups of severity grade: G0 (<50 microvacuoles per mm(2) ), G1 (50-150 microvacuoles per mm(2) ), and G2 (>150 microvacuoles per mm(2) ). All eyes underwent a best-corrected visual acuity evaluation (BCVA, LogMAR scale), a complete clinical examination, a visual field test, a contrast sensitivity evaluation and a wavefront analysis of high-order aberrations (HOAs) using a Shack-Hartmann aberrometer. Eyes with a posterior capsular opacification and a BCVA>0.30 LogMAR were excluded. RESULTS: Twenty six eyes (38.8%) had a grade 0, 12 eyes (17.9%) a grade 1 and 29 eyes (43.3%) a grade 2 of glistening severity grade. The mean follow-up after cataract surgery was 35.2 ± 24.2 months and was significantly higher for G1 and G2 groups (p < 0.001). A higher number of topical glaucoma medication were associated with a higher glistening severity grade (p < 0.05). G1 and G2 groups had significantly lower mean contrast sensitivity values at high spatial frequencies and significantly higher loss variance (LV) values of the visual field test (p < 0.05). There was no significant difference in mean BCVA between groups (p = 0.455). CONCLUSIONS: In glaucomatous eyes, glistening increased with time was associated with the number of topical glaucoma medications daily instilled and altered visual performances. It should be a consideration for glaucoma patients who are more likely to develop glistening within the IOL optic.
Asunto(s)
Deslumbramiento , Glaucoma/fisiopatología , Lentes Intraoculares , Facoemulsificación , Seudofaquia/fisiopatología , Agudeza Visual/fisiología , Campos Visuales/fisiología , Aberrometría , Resinas Acrílicas , Anciano , Anciano de 80 o más Años , Sensibilidad de Contraste/fisiología , Aberración de Frente de Onda Corneal/fisiopatología , Femenino , Humanos , Masculino , Estudios Prospectivos , Factores de Riesgo , VacuolasRESUMEN
We report on a series of 6 patients who experienced yellow vision after uncomplicated cataract surgery in their second eye. In the first eye, an aspheric blue-light filtering intraocular lens (IOL) was implanted, followed by the implantation of a 1-Piece aspheric IOL in the second eye. The time between the surgeries ranged from 12 months to 3 years. The patients experienced noticeable differences between the yellow and the clear lens. It is suggested to avoid mixing blue light-filtering and UV-filtering IOLs in the same patient, particularly in those who have high expectations following cataract surgery.
RESUMEN
PURPOSE: To develop a method for automatizing the detection of subclinical keratoconus based on a tree classification. DESIGN: Retrospective case-control study. METHODS: setting: University Hospital of Bordeaux. participants: A total of 372 eyes of 197 patients were enrolled: 177 normal eyes of 95 subjects, 47 eyes of 47 patients with forme fruste keratoconus, and 148 eyes of 102 patients with keratoconus. observation procedure: All eyes were imaged with a dual Scheimpflug analyzer. Fifty-five parameters derived from anterior and posterior corneal measurements were analyzed for each eye and a machine learning algorithm, the classification and regression tree, was used to classify the eyes into the 3 above-mentioned conditions. main outcome measures: The performance of the machine learning algorithm for classifying eye conditions was evaluated, and the curvature, elevation, pachymetric, and wavefront parameters were analyzed in each group and compared. RESULTS: The discriminating rules generated with the automated decision tree classifier allowed for discrimination between normal and keratoconus with 100% sensitivity and 99.5% specificity, and between normal and forme fruste keratoconus with 93.6% sensitivity and 97.2% specificity. The algorithm selected as the most discriminant variables parameters related to posterior surface asymmetry and thickness spatial distribution. CONCLUSION: The machine learning classifier showed very good performance for discriminating between normal corneas and forme fruste keratoconus and provided a tool that is closer to an automated medical reasoning. This might help in the surgical decision before refractive surgery by providing a good sensitivity in detecting ectasia-susceptible corneas.