Titre : Voies optiques

Voies optiques : Questions médicales fréquentes

Termes MeSH sélectionnés :

Cross-Over Studies
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"name": "Article complet : Voies optiques - Questions et réponses", "headline": "Questions et réponses médicales fréquentes sur Voies optiques", "description": "Une compilation de questions et réponses structurées, validées par des experts médicaux.", "datePublished": "2025-05-09", "inLanguage": "fr", "hasPart": [ { "@type": "MedicalWebPage", "name": "Diagnostic", "headline": "Diagnostic sur Voies optiques", "description": "Comment diagnostiquer une lésion des voies optiques ?\nQuels tests sont utilisés pour évaluer la vision ?\nQuelles sont les causes possibles de troubles visuels ?\nComment évaluer la fonction des nerfs optiques ?\nQuel rôle joue l'IRM dans le diagnostic ?", "url": "https://questionsmedicales.fr/mesh/D014795?mesh_terms=Cross-Over+Studies&page=3#section-diagnostic" }, { "@type": "MedicalWebPage", "name": "Symptômes", "headline": "Symptômes sur Voies optiques", "description": "Quels sont les symptômes d'une atteinte des voies optiques ?\nComment se manifeste une névrite optique ?\nQuels signes indiquent une compression des voies optiques ?\nQuels symptômes peuvent indiquer un AVC visuel ?\nComment reconnaître un glaucome ?", "url": "https://questionsmedicales.fr/mesh/D014795?mesh_terms=Cross-Over+Studies&page=3#section-symptômes" }, { "@type": "MedicalWebPage", "name": "Prévention", "headline": "Prévention sur Voies optiques", "description": "Comment prévenir les maladies des voies optiques ?\nQuels examens sont recommandés pour les personnes à risque ?\nComment réduire le risque de glaucome ?\nQuelles habitudes alimentaires favorisent la santé oculaire ?\nComment protéger ses yeux des blessures ?", "url": "https://questionsmedicales.fr/mesh/D014795?mesh_terms=Cross-Over+Studies&page=3#section-prévention" }, { "@type": "MedicalWebPage", "name": "Traitements", "headline": "Traitements sur Voies optiques", "description": "Quels traitements existent pour la névrite optique ?\nComment traiter un glaucome ?\nQuelles sont les options pour les tumeurs des voies optiques ?\nComment gérer les troubles du champ visuel ?\nQuels médicaments sont utilisés pour traiter les AVC visuels ?", "url": "https://questionsmedicales.fr/mesh/D014795?mesh_terms=Cross-Over+Studies&page=3#section-traitements" }, { "@type": "MedicalWebPage", "name": "Complications", "headline": "Complications sur Voies optiques", "description": "Quelles complications peuvent survenir après une névrite optique ?\nQuels risques sont associés à un AVC visuel ?\nComment le glaucome peut-il affecter la qualité de vie ?\nQuelles sont les conséquences d'une tumeur des voies optiques ?\nQuels effets secondaires peuvent résulter des traitements ?", "url": "https://questionsmedicales.fr/mesh/D014795?mesh_terms=Cross-Over+Studies&page=3#section-complications" }, { "@type": "MedicalWebPage", "name": "Facteurs de risque", "headline": "Facteurs de risque sur Voies optiques", "description": "Quels facteurs augmentent le risque de glaucome ?\nComment le tabagisme influence-t-il la santé oculaire ?\nQuels antécédents médicaux sont des facteurs de risque ?\nQuel rôle joue l'hypertension dans les maladies oculaires ?\nComment l'exposition au soleil affecte-t-elle les yeux ?", "url": "https://questionsmedicales.fr/mesh/D014795?mesh_terms=Cross-Over+Studies&page=3#section-facteurs de risque" } ] }, { "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "Comment diagnostiquer une lésion des voies optiques ?", "position": 1, "acceptedAnswer": { "@type": "Answer", "text": "Un examen ophtalmologique complet et des imageries cérébrales comme l'IRM sont nécessaires." } }, { "@type": "Question", "name": "Quels tests sont utilisés pour évaluer la vision ?", "position": 2, "acceptedAnswer": { "@type": "Answer", "text": "Les tests de vision, comme l'acuité visuelle et le champ visuel, sont couramment utilisés." } }, { "@type": "Question", "name": "Quelles sont les causes possibles de troubles visuels ?", "position": 3, "acceptedAnswer": { "@type": "Answer", "text": "Les causes incluent les tumeurs, les AVC, et les maladies dégénératives des nerfs optiques." } }, { "@type": "Question", "name": "Comment évaluer la fonction des nerfs optiques ?", "position": 4, "acceptedAnswer": { "@type": "Answer", "text": "Des tests comme l'électrorétinogramme (ERG) et l'électroencéphalogramme (EEG) peuvent être utilisés." } }, { "@type": "Question", "name": "Quel rôle joue l'IRM dans le diagnostic ?", "position": 5, "acceptedAnswer": { "@type": "Answer", "text": "L'IRM permet de visualiser les anomalies structurelles des voies optiques et du cerveau." } }, { "@type": "Question", "name": "Quels sont les symptômes d'une atteinte des voies optiques ?", "position": 6, "acceptedAnswer": { "@type": "Answer", "text": "Les symptômes incluent la perte de vision, des troubles du champ visuel et des douleurs oculaires." } }, { "@type": "Question", "name": "Comment se manifeste une névrite optique ?", "position": 7, "acceptedAnswer": { "@type": "Answer", "text": "Elle se manifeste par une vision floue, des douleurs à l'œil et une perte de couleur." } }, { "@type": "Question", "name": "Quels signes indiquent une compression des voies optiques ?", "position": 8, "acceptedAnswer": { "@type": "Answer", "text": "Des signes incluent une vision double, des maux de tête et une perte de vision progressive." } }, { "@type": "Question", "name": "Quels symptômes peuvent indiquer un AVC visuel ?", "position": 9, "acceptedAnswer": { "@type": "Answer", "text": "Des symptômes incluent une perte soudaine de vision d'un œil et des troubles de l'équilibre." } }, { "@type": "Question", "name": "Comment reconnaître un glaucome ?", "position": 10, "acceptedAnswer": { "@type": "Answer", "text": "Le glaucome peut se manifester par une vision tunnel et des douleurs oculaires, surtout en cas aigu." } }, { "@type": "Question", "name": "Comment prévenir les maladies des voies optiques ?", "position": 11, "acceptedAnswer": { "@type": "Answer", "text": "Un contrôle régulier de la santé oculaire et un mode de vie sain sont essentiels." } }, { "@type": "Question", "name": "Quels examens sont recommandés pour les personnes à risque ?", "position": 12, "acceptedAnswer": { "@type": "Answer", "text": "Des examens ophtalmologiques réguliers sont recommandés, surtout pour les personnes âgées." } }, { "@type": "Question", "name": "Comment réduire le risque de glaucome ?", "position": 13, "acceptedAnswer": { "@type": "Answer", "text": "Maintenir une pression artérielle normale et éviter le tabagisme peut réduire le risque." } }, { "@type": "Question", "name": "Quelles habitudes alimentaires favorisent la santé oculaire ?", "position": 14, "acceptedAnswer": { "@type": "Answer", "text": "Une alimentation riche en antioxydants, comme les légumes verts et les fruits, est bénéfique." } }, { "@type": "Question", "name": "Comment protéger ses yeux des blessures ?", "position": 15, "acceptedAnswer": { "@type": "Answer", "text": "Porter des lunettes de protection lors d'activités à risque aide à prévenir les blessures oculaires." } }, { "@type": "Question", "name": "Quels traitements existent pour la névrite optique ?", "position": 16, "acceptedAnswer": { "@type": "Answer", "text": "Les corticostéroïdes sont souvent prescrits pour réduire l'inflammation et améliorer la vision." } }, { "@type": "Question", "name": "Comment traiter un glaucome ?", "position": 17, "acceptedAnswer": { "@type": "Answer", "text": "Le glaucome est traité par des médicaments, des laser ou une chirurgie pour réduire la pression intraoculaire." } }, { "@type": "Question", "name": "Quelles sont les options pour les tumeurs des voies optiques ?", "position": 18, "acceptedAnswer": { "@type": "Answer", "text": "Les options incluent la chirurgie, la radiothérapie et la chimiothérapie selon le type de tumeur." } }, { "@type": "Question", "name": "Comment gérer les troubles du champ visuel ?", "position": 19, "acceptedAnswer": { "@type": "Answer", "text": "Des rééducations visuelles et des aides visuelles peuvent aider à compenser les pertes." } }, { "@type": "Question", "name": "Quels médicaments sont utilisés pour traiter les AVC visuels ?", "position": 20, "acceptedAnswer": { "@type": "Answer", "text": "Des anticoagulants et des médicaments pour contrôler la pression artérielle sont souvent prescrits." } }, { "@type": "Question", "name": "Quelles complications peuvent survenir après une névrite optique ?", "position": 21, "acceptedAnswer": { "@type": "Answer", "text": "Des complications incluent une perte permanente de vision et des récidives de la maladie." } }, { "@type": "Question", "name": "Quels risques sont associés à un AVC visuel ?", "position": 22, "acceptedAnswer": { "@type": "Answer", "text": "Les risques incluent des séquelles visuelles permanentes et des troubles cognitifs." } }, { "@type": "Question", "name": "Comment le glaucome peut-il affecter la qualité de vie ?", "position": 23, "acceptedAnswer": { "@type": "Answer", "text": "Le glaucome peut entraîner une perte de vision progressive, affectant les activités quotidiennes." } }, { "@type": "Question", "name": "Quelles sont les conséquences d'une tumeur des voies optiques ?", "position": 24, "acceptedAnswer": { "@type": "Answer", "text": "Les conséquences peuvent inclure des troubles visuels, des maux de tête et des troubles neurologiques." } }, { "@type": "Question", "name": "Quels effets secondaires peuvent résulter des traitements ?", "position": 25, "acceptedAnswer": { "@type": "Answer", "text": "Les traitements peuvent entraîner des effets secondaires comme des infections, des douleurs et des nausées." } }, { "@type": "Question", "name": "Quels facteurs augmentent le risque de glaucome ?", "position": 26, "acceptedAnswer": { "@type": "Answer", "text": "L'âge, les antécédents familiaux et certaines conditions médicales comme le diabète augmentent le risque." } }, { "@type": "Question", "name": "Comment le tabagisme influence-t-il la santé oculaire ?", "position": 27, "acceptedAnswer": { "@type": "Answer", "text": "Le tabagisme est lié à un risque accru de maladies oculaires, y compris le glaucome et la cataracte." } }, { "@type": "Question", "name": "Quels antécédents médicaux sont des facteurs de risque ?", "position": 28, "acceptedAnswer": { "@type": "Answer", "text": "Les antécédents de maladies auto-immunes ou de troubles neurologiques augmentent le risque." } }, { "@type": "Question", "name": "Quel rôle joue l'hypertension dans les maladies oculaires ?", "position": 29, "acceptedAnswer": { "@type": "Answer", "text": "L'hypertension peut endommager les vaisseaux sanguins de l'œil, augmentant le risque de glaucome." } }, { "@type": "Question", "name": "Comment l'exposition au soleil affecte-t-elle les yeux ?", "position": 30, "acceptedAnswer": { "@type": "Answer", "text": "Une exposition excessive au soleil peut augmenter le risque de cataracte et de dégénérescence maculaire." } } ] } ] }

Sources (10000 au total)

Evaluation of the Diagnostic Accuracy of Non-Specific Bronchial Provocation Tests in the Diagnosis of Asthma: A Randomized Cross-Over Study.

The role of bronchial provocation tests in the diagnosis of asthma remains to be fully explored. We aimed to evaluate methacholine and mannitol challenge testing, and explore the factors associated wi... Observational, cross-over, randomized trial evaluating adult cases with suspected asthma, naïve to treatment, with normal pre-bronchodilator spirometry, and negative bronchodilator test. Patients were... The study included 108 cases (50.0% diagnosed with asthma and 51.9% cases starting with methacholine). The percentage of cases positive to methacholine and mannitol were 30.6% and 25.0% respectively. ... Our study confirms the diagnostic profile of methacholine and mannitol challenge tests and describes the variable associated to their positivity with new proposed cutoff values....

Performance and safety of the PRICO closed-loop oxygen saturation targeting system in neonates: pragmatic multicentre cross-over study (TarOx Study).

This study aims to evaluate the performance of the fabian-Predictive-Intelligent-Control-of-Oxygenation (PRICO) system for automated control of the fraction of inspired oxygen (FiO... Multicentre randomised cross-over study.... Five neonatal intensive care units experienced with automated control of FiO... 39 infants: median gestational age of 27 weeks (IQR: 26-30), postnatal age 7 days (IQR: 2-17), weight 1120 g (IQR: 915-1588), FiO... Randomised sequential 24-hour periods of automated and manual FiO... Proportion (%) of time in normoxaemia (90%-95% with FiO... During automated control, subjects spent more time in normoxaemia (74%±22% vs 51%±22%, p<0.001) with less time above and below (<90% (9%±8% vs 12%±11%, p<0.001) and >95% with FiO... This study demonstrates the ability of the PRICO automated oxygen control algorithm to improve the maintenance of SpO...

Multichannel transcranial direct current stimulation over the left dorsolateral prefrontal cortex may modulate the induction of secondary hyperalgesia, a double-blinded cross-over study in healthy volunteers.

Central sensitization is thought to play a critical role in the development of chronic pain, and secondary mechanical hyperalgesia is considered one of its hall-mark features. Consequently, interventi... To determine whether multifocal transcranial direct current stimulation (tDCS) targeting the left DLPFC affects the development of secondary mechanical hyperalgesia.... In this within-subjects, cross-over, double-blinded study, eighteen healthy volunteers participated in three experimental sessions. After 20 minutes of either anodal, cathodal, or sham multichannel tD... HFS resulted in a robust and unilateral increase in the intensity of perception to mechanical pinprick stimuli at the HFS arm, which was not different between tDCS stimulation conditions. However, the... Anodal tDCS over the left DLPFC modestly modulates the size of the HFS-induced area of secondary mechanical hyperalgesia, suggesting that non-invasive neuromodulation targeting the left DLPFC may be a...

Remote testing in Abbiategrasso (RTA): results from a counterbalanced cross-over study on direct-to-home neuropsychology with older adults.

The SARS-CoV-2 pandemic forced to rethink teleneuropsychology, since neuropsychological assessments started to be performed by phone or videoconference, with personal devices and without direct assist... The present study, employing a counterbalanced cross-over design, was aimed at evaluating (1) the feasibility and (2) the acceptability of DTH-NP in Italian older adults without previously diagnosed n... Fifty-eight community-dwelling older adults (65-85 years) were randomly assigned to one of two groups performing a complete neuropsychological assessment remotely (via phone call and videoconference) ... Recruitment rate was 81%, with a preference for telephonic contact (79%). The acceptability analysis did not reveal any issues related to the DTH-NP assessment, even if most participants would rather ... Our results point out to a good recruitment rate in a DTH-NP study in an Italian population of older adults (mean age = 80), satisfying acceptability of DTH-NP and remote-face-to-face comparability of...

Artificial intelligence-enhanced volumetric laser endomicroscopy improves dysplasia detection in Barrett's esophagus in a randomized cross-over study.

Volumetric laser endomicroscopy (VLE) is an advanced endoscopic imaging tool that can improve dysplasia detection in Barrett's esophagus (BE). However, VLE scans generate 1200 cross-sectional images t...

Effects of a Paleolithic diet compared to a diabetes diet on leptin binding inhibition in secondary analysis of a randomised cross-over study.

Beneficial effects from practising a Paleolithic diet as compared to a diabetes diet on weight, waist circumference, satiety, leptin, HbA1c and glucose control in randomised controlled trial participa... To assess the effects of a Paleolithic diet compared to a diabetes diet on leptin binding inhibition and to replicate our in vitro study.... BioLep and total leptin levels were measured in secondary analysis of fasting plasma samples from our open label random order three plus three-month long cross-over trial performed in 2005-2007, that ... There was no difference between diets when comparing differences between bioLep and total leptin levels and their ratio in the 13 participants, three women and 10 men, aged 52-74 years with a mean BMI... We found no leptin binding inhibition after the Paleolithic or diabetes diet, possibly due to its abolishment from cooking-related heat treatment of wheat gluten.... Registered on 14/02/2007 at ClinicalTrials.gov Identifier: NCT00435240....

Incobotulinum Toxin-A in Professional Musicians with Focal Task-Specific Dystonia: A Double Blind, Placebo Controlled, Cross-Over Study.

Musician's focal task-specific dystonia is a complex disorder of fine motor control, with incomplete understanding of its etiology. There have been relatively few trials of botulinum toxin in upper li... We conducted a double-blind, placebo-controlled, randomized, cross-over study of incobotulinum toxin-A in 21 professional musicians with focal upper extremity task-specific dystonia affecting performa... 19 men and 2 women with musicians' dystonia were enrolled over a six-year period. Nineteen patients completed the study. Analysis of the primary outcome measure in comparison to baseline revealed a ch... Despite its small sample size, our study demonstrated a statistically significant benefit of incobotulinum toxin-A injections as a treatment for musicians' task-specific dystonia. Tailoring the use of...

Infrared flashing light through the cricothyroid membrane as guidance to awake intubation with a flexible bronchoscope: A randomised cross-over study.

In case of distorted airway anatomy, awake intubation with a flexible bronchoscope can be extremely difficult or even impossible. To facilitate this demanding procedure, an infrared flashing light sou... As part of awake intubation, patients underwent insertion of a flexible video bronchoscope via the mouth into the trachea. The procedure was performed twice, in random order in each patient, with and ... Twenty-two patients had a total of 44 awake insertions with the flexible bronchoscope. The median anatomical level, at which correct identification of the trachea was obtained on the monitor, was, pas... During awake intubation of patients with airway pathology, the application of trans-cricothyroid infrared flashing light to guide the insertion of a flexible bronchoscope significantly facilitated the... NCT03930550....