Science des ultrasons : Questions médicales fréquentes
Nom anglais: Ultrasonics
Descriptor UI:D014465
Tree Number:H01.671.031.849
Termes MeSH sélectionnés :
Visual Fields
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"headline": "Diagnostic sur Science des ultrasons",
"description": "Comment les ultrasons sont-ils utilisés en diagnostic ?\nQuels types d'examens utilisent les ultrasons ?\nLes ultrasons peuvent-ils détecter des tumeurs ?\nLes ultrasons sont-ils sûrs pour les femmes enceintes ?\nPeut-on utiliser les ultrasons pour évaluer le cœur ?",
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"description": "Comment les ultrasons aident-ils à la prévention des maladies ?\nLes échographies peuvent-elles prévenir des complications pendant la grossesse ?\nLes ultrasons peuvent-ils aider à prévenir les maladies cardiovasculaires ?\nComment les ultrasons contribuent-ils à la santé des femmes ?\nLes ultrasons peuvent-ils aider à prévenir des infections ?",
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"description": "Quels facteurs augmentent le besoin d'échographies ?\nLes personnes âgées ont-elles besoin de plus d'échographies ?\nLes antécédents de cancer augmentent-ils le besoin d'échographies ?\nLes femmes enceintes à risque ont-elles besoin d'échographies fréquentes ?\nLes personnes avec des maladies cardiovasculaires doivent-elles faire des échographies ?",
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"@type": "Question",
"name": "Comment les ultrasons sont-ils utilisés en diagnostic ?",
"position": 1,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les ultrasons permettent de visualiser les organes internes et détecter des anomalies."
}
},
{
"@type": "Question",
"name": "Quels types d'examens utilisent les ultrasons ?",
"position": 2,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les échographies abdominales, cardiaques et obstétricales sont courantes."
}
},
{
"@type": "Question",
"name": "Les ultrasons peuvent-ils détecter des tumeurs ?",
"position": 3,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, ils aident à localiser et évaluer la taille des tumeurs dans divers organes."
}
},
{
"@type": "Question",
"name": "Les ultrasons sont-ils sûrs pour les femmes enceintes ?",
"position": 4,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, les ultrasons sont considérés comme sûrs et non invasifs pendant la grossesse."
}
},
{
"@type": "Question",
"name": "Peut-on utiliser les ultrasons pour évaluer le cœur ?",
"position": 5,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, l'échocardiographie utilise des ultrasons pour examiner la fonction cardiaque."
}
},
{
"@type": "Question",
"name": "Quels symptômes peuvent nécessiter un examen par ultrasons ?",
"position": 6,
"acceptedAnswer": {
"@type": "Answer",
"text": "Des douleurs abdominales, des masses palpables ou des anomalies détectées à l'examen."
}
},
{
"@type": "Question",
"name": "Les ultrasons peuvent-ils aider à diagnostiquer des infections ?",
"position": 7,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, ils peuvent montrer des abcès ou des inflammations dans les tissus."
}
},
{
"@type": "Question",
"name": "Quels signes indiquent une échographie abdominale ?",
"position": 8,
"acceptedAnswer": {
"@type": "Answer",
"text": "Des symptômes comme des nausées, vomissements ou jaunisse peuvent le justifier."
}
},
{
"@type": "Question",
"name": "Les ultrasons peuvent-ils détecter des anomalies vasculaires ?",
"position": 9,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, l'échographie Doppler évalue la circulation sanguine et les anomalies vasculaires."
}
},
{
"@type": "Question",
"name": "Quels symptômes cardiaques peuvent nécessiter une échocardiographie ?",
"position": 10,
"acceptedAnswer": {
"@type": "Answer",
"text": "Des palpitations, essoufflement ou douleurs thoraciques peuvent justifier cet examen."
}
},
{
"@type": "Question",
"name": "Comment les ultrasons aident-ils à la prévention des maladies ?",
"position": 11,
"acceptedAnswer": {
"@type": "Answer",
"text": "Ils permettent un dépistage précoce des maladies, comme les cancers ou les maladies cardiaques."
}
},
{
"@type": "Question",
"name": "Les échographies peuvent-elles prévenir des complications pendant la grossesse ?",
"position": 12,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, elles surveillent le développement du fœtus et détectent des anomalies précoces."
}
},
{
"@type": "Question",
"name": "Les ultrasons peuvent-ils aider à prévenir les maladies cardiovasculaires ?",
"position": 13,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, ils évaluent les risques et détectent les problèmes cardiaques avant qu'ils ne s'aggravent."
}
},
{
"@type": "Question",
"name": "Comment les ultrasons contribuent-ils à la santé des femmes ?",
"position": 14,
"acceptedAnswer": {
"@type": "Answer",
"text": "Ils permettent de surveiller la santé reproductive et de détecter des anomalies gynécologiques."
}
},
{
"@type": "Question",
"name": "Les ultrasons peuvent-ils aider à prévenir des infections ?",
"position": 15,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, ils peuvent détecter des abcès ou des inflammations avant qu'elles ne s'aggravent."
}
},
{
"@type": "Question",
"name": "Les ultrasons sont-ils utilisés en thérapie ?",
"position": 16,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, ils sont utilisés pour traiter des douleurs, des lésions et des calculs rénaux."
}
},
{
"@type": "Question",
"name": "Comment les ultrasons aident-ils à traiter les calculs rénaux ?",
"position": 17,
"acceptedAnswer": {
"@type": "Answer",
"text": "La lithotripsie par ultrasons brise les calculs en petits morceaux pour faciliter l'élimination."
}
},
{
"@type": "Question",
"name": "Les ultrasons peuvent-ils aider à la cicatrisation des blessures ?",
"position": 18,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, ils stimulent la circulation sanguine et favorisent la régénération des tissus."
}
},
{
"@type": "Question",
"name": "Peut-on utiliser les ultrasons pour traiter des douleurs articulaires ?",
"position": 19,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, la thérapie par ultrasons peut réduire la douleur et l'inflammation dans les articulations."
}
},
{
"@type": "Question",
"name": "Les ultrasons sont-ils efficaces pour traiter les tumeurs ?",
"position": 20,
"acceptedAnswer": {
"@type": "Answer",
"text": "Ils peuvent être utilisés pour détruire certaines tumeurs par ablation ciblée."
}
},
{
"@type": "Question",
"name": "Quelles complications peuvent survenir avec les ultrasons ?",
"position": 21,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les complications sont rares, mais peuvent inclure des réactions allergiques aux gels utilisés."
}
},
{
"@type": "Question",
"name": "Les ultrasons peuvent-ils causer des douleurs ?",
"position": 22,
"acceptedAnswer": {
"@type": "Answer",
"text": "Généralement non, mais une pression excessive peut provoquer un léger inconfort."
}
},
{
"@type": "Question",
"name": "Y a-t-il des risques liés à l'échographie pendant la grossesse ?",
"position": 23,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les échographies sont considérées comme sûres, mais doivent être effectuées par des professionnels."
}
},
{
"@type": "Question",
"name": "Les ultrasons peuvent-ils endommager les tissus ?",
"position": 24,
"acceptedAnswer": {
"@type": "Answer",
"text": "À des niveaux normaux, ils ne causent pas de dommages, mais une exposition excessive est à éviter."
}
},
{
"@type": "Question",
"name": "Quelles sont les complications possibles de la lithotripsie par ultrasons ?",
"position": 25,
"acceptedAnswer": {
"@type": "Answer",
"text": "Des saignements ou des infections peuvent survenir après le traitement des calculs rénaux."
}
},
{
"@type": "Question",
"name": "Quels facteurs augmentent le besoin d'échographies ?",
"position": 26,
"acceptedAnswer": {
"@type": "Answer",
"text": "Antécédents familiaux de maladies, symptômes persistants ou grossesse à risque."
}
},
{
"@type": "Question",
"name": "Les personnes âgées ont-elles besoin de plus d'échographies ?",
"position": 27,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, elles sont plus susceptibles de développer des maladies nécessitant un suivi par ultrasons."
}
},
{
"@type": "Question",
"name": "Les antécédents de cancer augmentent-ils le besoin d'échographies ?",
"position": 28,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, un suivi régulier par ultrasons est souvent recommandé pour détecter des récidives."
}
},
{
"@type": "Question",
"name": "Les femmes enceintes à risque ont-elles besoin d'échographies fréquentes ?",
"position": 29,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, elles nécessitent un suivi plus étroit pour surveiller le développement du fœtus."
}
},
{
"@type": "Question",
"name": "Les personnes avec des maladies cardiovasculaires doivent-elles faire des échographies ?",
"position": 30,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, elles peuvent nécessiter des échographies régulières pour surveiller leur état cardiaque."
}
}
]
}
]
}
To compare clinical visual field outputs in glaucoma and healthy patients returned by the Humphrey Field Analyzer (HFA) and virtual reality (Virtual Field, VF) perimetry....
One eye of 54 glaucoma patients and 41 healthy subjects was prospectively tested (three times each in random order) using the HFA and VF perimeters (24-2 test grids). We extracted and compared global ...
The VF test was shorter (by 76 s) and had lower fixation losses (by 0.08) and false-positive rate (by 0.01) compared to the HFA (all p < 0.0001). Intraclass correlations were 0.86, 0.82 and 0.47 for M...
Virtual Field returns global results that are correlated with the HFA, but pointwise sensitivities were more variable. Differences in test-retest variability and defect detection by its current normat...
Intraocular pressure is currently the only known reliable, modifiable risk factor for the development and progression of glaucoma. Other risk factors for glaucoma include increasing age, myopia, decre...
Neuroanatomical variations across the visual field of human observers go along with corresponding variations of the perceived coarseness of visual stimuli. Here we show that horizontal gratings are pe...
Human visual performance changes dramatically both across (eccentricity) and around (polar angle) the visual field. Performance is better at the fovea, decreases with eccentricity, and is better along...
The earlier a person quits smoking the more likely is the optic nerve be spared from damage....
To investigate the effect of smoking cessation on visual field (VF) progression in glaucoma....
Primary open angle glaucoma patients with a minimum of 3 years follow-up and 5 VFs were included. Linear mixed models were used to investigate the effects of smoking on the rates of 24-2 VF mean devia...
Five hundred eleven eyes of 354 patients were included over the mean follow-up of 12.4 years. Mean baseline age (95% confidence interval) was 62.3 (61.2, 63.4) years. One hundred forty nine (42.1%) pa...
After ≥25 years of smoking cessation, the risk of VF progression in former heavy smokers becomes similar to never smokers. Long-term smoking cessation may be associated with lower VF progression in gl...
Previous studies have suggested behavioral patterns, such as visual attention and eye movements, relate to individual personality traits. However, these studies mainly focused on free visual tasks, an...
Despite, the potential clinical utility of 60-4 visual fields, they are not frequently used in clinical practice partly, due to the purported impact of facial contour on field defects. The purpose of ...
Subjects with no ocular pathology were included. Participants were subject to optical coherence tomography, 60-4 Swedish interactive thresholding algorithm visual field tests and photography. The pred...
30 healthy were enrolled. Three-dimensional facial reconstruction using a convolution neural network (CNN) was able to predict facial contour-dependent 60-4 visual field defects in 30 subjects without...
This pilot study reports the development of a CNN-enhanced platform capable of predicting 60-4 visual field defects in healthy controls based on facial contour. Further study with this platform may en...
To measure visual field (VF) rates of change after Ahmed Glaucoma Valve (AGV) implantation and to investigate risk factors for progression....
Retrospective, clinical cohort study....
Patients who underwent AGV implantation with at least 4 eligible postoperative VFs and 2 years of follow-up were included. Baseline, intraoperative, and postoperative data were collected. VF progressi...
A total of 173 eyes were included. The intraocular pressure (IOP) and number of glaucoma medications were significantly reduced from a median (interquartile range [IQR]) of 23.5 (12.1) mm Hg at baseli...
To our knowledge, this is the largest published series reporting long-term VF outcomes after glaucoma drainage device implantation. There is a continued, significant rate of VF decline after AGV surge...
To evaluate the relationship between interocular asymmetries of corneal hysteresis (CH) and visual field defects in Korean patients with glaucoma....
A total of 444 eyes from 222 participants with glaucoma in at least one eye were enrolled. CH was measured using an ocular response analyzer (Reichert Technologies Inc). Eyes of each participant were ...
Median (interquartile range) MD value was -3.71 dB (-6.87 to -1.30 dB) in the better eye and -10.20 dB (-16.32 to -5.62 dB) in the worse eye. When the correlation between the asymmetry of the MD value...
The interocular asymmetry of CH was significantly correlated with the interocular asymmetry of visual field defects in glaucoma....
To compare the accuracy of detecting moderate and rapid rates of glaucoma worsening over a 2-year period with different numbers of OCT scans and visual field (VF) tests in a large sample of glaucoma a...
Descriptive and simulation study....
The OCT sample comprised 12 150 eyes from 7392 adults with glaucoma or glaucoma suspect status followed up at the Wilmer Eye Institute from 2013 through 2021. The VF sample comprised 20 583 eyes from ...
Within-eye rates of change in retinal nerve fiber layer (RNFL) thickness and mean deviation (MD) were measured using linear regression. For each measured rate, simulated measurements of RNFL thickness...
The accuracy of diagnosing moderate and rapid rates of glaucoma worsening for different numbers of OCT scans and VF tests over a 2-year period....
Accuracy was less than 50% for both OCT and VF when diagnosing worsening after a 2-year period. OCT accuracy was 5 to 10 percentage points higher than VF accuracy at detecting moderate worsening and 1...
More frequent OCT scans and VF tests are needed to improve the accuracy of diagnosing glaucoma worsening. Accuracy greatly increases when relying on both OCT and VF to detect worsening....
The author(s) have no proprietary or commercial interest in any materials discussed in this article....