Titre : Barrière hémato-encéphalique

Barrière hémato-encéphalique : Questions médicales fréquentes

Termes MeSH sélectionnés :

Elasticity Imaging Techniques
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"position": 5, "name": "Barrière hémato-encéphalique", "item": "https://questionsmedicales.fr/mesh/D001812" } ] } }, { "@type": "MedicalWebPage", "name": "Article complet : Barrière hémato-encéphalique - Questions et réponses", "headline": "Questions et réponses médicales fréquentes sur Barrière hémato-encéphalique", "description": "Une compilation de questions et réponses structurées, validées par des experts médicaux.", "datePublished": "2025-05-02", "inLanguage": "fr", "hasPart": [ { "@type": "MedicalWebPage", "name": "Diagnostic", "headline": "Diagnostic sur Barrière hémato-encéphalique", "description": "Comment évaluer l'intégrité de la barrière hémato-encéphalique ?\nQuels signes indiquent une défaillance de la barrière ?\nQuels tests sanguins sont utiles pour le diagnostic ?\nLa biopsie est-elle nécessaire pour le diagnostic ?\nQuels examens neurologiques sont recommandés ?", "url": 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"https://questionsmedicales.fr/mesh/D001812?mesh_terms=Elasticity+Imaging+Techniques&page=3#section-prévention" }, { "@type": "MedicalWebPage", "name": "Traitements", "headline": "Traitements sur Barrière hémato-encéphalique", "description": "Quels traitements sont disponibles pour les troubles de la barrière ?\nLa chirurgie est-elle une option de traitement ?\nLes corticostéroïdes sont-ils utilisés ?\nY a-t-il des traitements expérimentaux ?\nComment la rééducation peut-elle aider ?", "url": "https://questionsmedicales.fr/mesh/D001812?mesh_terms=Elasticity+Imaging+Techniques&page=3#section-traitements" }, { "@type": "MedicalWebPage", "name": "Complications", "headline": "Complications sur Barrière hémato-encéphalique", "description": "Quelles complications peuvent survenir ?\nLes AVC sont-ils une complication possible ?\nDes troubles cognitifs peuvent-ils se développer ?\nLa démence est-elle une complication ?\nLes troubles psychiatriques sont-ils possibles ?", "url": "https://questionsmedicales.fr/mesh/D001812?mesh_terms=Elasticity+Imaging+Techniques&page=3#section-complications" }, { "@type": "MedicalWebPage", "name": "Facteurs de risque", "headline": "Facteurs de risque sur Barrière hémato-encéphalique", "description": "Quels facteurs augmentent le risque de défaillance ?\nLe diabète est-il un facteur de risque ?\nL'alcoolisme influence-t-il la barrière ?\nLe tabagisme est-il un risque ?\nLes infections virales sont-elles préoccupantes ?", "url": "https://questionsmedicales.fr/mesh/D001812?mesh_terms=Elasticity+Imaging+Techniques&page=3#section-facteurs de risque" } ] }, { "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "Comment évaluer l'intégrité de la barrière hémato-encéphalique ?", "position": 1, "acceptedAnswer": { "@type": "Answer", "text": "Des tests d'imagerie comme l'IRM et des analyses de liquide céphalorachidien sont utilisés." } }, { "@type": "Question", "name": "Quels signes indiquent une défaillance de la barrière ?", "position": 2, "acceptedAnswer": { "@type": "Answer", "text": "Des symptômes neurologiques, des infections ou des inflammations peuvent indiquer une défaillance." } }, { "@type": "Question", "name": "Quels tests sanguins sont utiles pour le diagnostic ?", "position": 3, "acceptedAnswer": { "@type": "Answer", "text": "Des tests pour détecter des anticorps ou des marqueurs inflammatoires peuvent être effectués." } }, { "@type": "Question", "name": "La biopsie est-elle nécessaire pour le diagnostic ?", "position": 4, "acceptedAnswer": { "@type": "Answer", "text": "Rarement, sauf dans des cas spécifiques comme les tumeurs cérébrales ou infections." } }, { "@type": "Question", "name": "Quels examens neurologiques sont recommandés ?", "position": 5, "acceptedAnswer": { "@type": "Answer", "text": "Des examens neurologiques complets, y compris des tests de réflexes et de coordination." } }, { "@type": "Question", "name": "Quels symptômes sont associés à une barrière défaillante ?", "position": 6, "acceptedAnswer": { "@type": "Answer", "text": "Des maux de tête, des troubles de la vision, et des changements de comportement peuvent survenir." } }, { "@type": "Question", "name": "La confusion mentale est-elle un symptôme ?", "position": 7, "acceptedAnswer": { "@type": "Answer", "text": "Oui, la confusion mentale peut résulter d'une altération de la barrière hémato-encéphalique." } }, { "@type": "Question", "name": "Des convulsions peuvent-elles se produire ?", "position": 8, "acceptedAnswer": { "@type": "Answer", "text": "Oui, des convulsions peuvent être un signe d'irritation cérébrale due à une défaillance." } }, { "@type": "Question", "name": "Quels symptômes neurologiques sont préoccupants ?", "position": 9, "acceptedAnswer": { "@type": "Answer", "text": "Des engourdissements, des faiblesses musculaires ou des troubles de l'équilibre sont préoccupants." } }, { "@type": "Question", "name": "La fatigue chronique est-elle liée à cette condition ?", "position": 10, "acceptedAnswer": { "@type": "Answer", "text": "Oui, la fatigue chronique peut être un symptôme associé à des troubles de la barrière." } }, { "@type": "Question", "name": "Comment prévenir les troubles de la barrière hémato-encéphalique ?", "position": 11, "acceptedAnswer": { "@type": "Answer", "text": "Maintenir un mode de vie sain, éviter les toxines et gérer les maladies chroniques aide." } }, { "@type": "Question", "name": "Les vaccinations sont-elles importantes ?", "position": 12, "acceptedAnswer": { "@type": "Answer", "text": "Oui, les vaccinations peuvent prévenir certaines infections qui affectent la barrière." } }, { "@type": "Question", "name": "Le contrôle de la pression artérielle aide-t-il ?", "position": 13, "acceptedAnswer": { "@type": "Answer", "text": "Oui, un bon contrôle de la pression artérielle peut réduire le risque de défaillance." } }, { "@type": "Question", "name": "L'alimentation joue-t-elle un rôle ?", "position": 14, "acceptedAnswer": { "@type": "Answer", "text": "Une alimentation équilibrée riche en antioxydants peut protéger la barrière hémato-encéphalique." } }, { "@type": "Question", "name": "Le stress peut-il affecter la barrière ?", "position": 15, "acceptedAnswer": { "@type": "Answer", "text": "Oui, le stress chronique peut avoir un impact négatif sur la santé de la barrière." } }, { "@type": "Question", "name": "Quels traitements sont disponibles pour les troubles de la barrière ?", "position": 16, "acceptedAnswer": { "@type": "Answer", "text": "Les traitements incluent des médicaments anti-inflammatoires et des thérapies ciblées." } }, { "@type": "Question", "name": "La chirurgie est-elle une option de traitement ?", "position": 17, "acceptedAnswer": { "@type": "Answer", "text": "La chirurgie peut être nécessaire pour retirer des tumeurs ou traiter des infections." } }, { "@type": "Question", "name": "Les corticostéroïdes sont-ils utilisés ?", "position": 18, "acceptedAnswer": { "@type": "Answer", "text": "Oui, les corticostéroïdes peuvent réduire l'inflammation et améliorer la fonction de la barrière." } }, { "@type": "Question", "name": "Y a-t-il des traitements expérimentaux ?", "position": 19, "acceptedAnswer": { "@type": "Answer", "text": "Des traitements expérimentaux incluent des thérapies géniques et des médicaments innovants." } }, { "@type": "Question", "name": "Comment la rééducation peut-elle aider ?", "position": 20, "acceptedAnswer": { "@type": "Answer", "text": "La rééducation peut aider à restaurer les fonctions neurologiques altérées par des troubles." } }, { "@type": "Question", "name": "Quelles complications peuvent survenir ?", "position": 21, "acceptedAnswer": { "@type": "Answer", "text": "Des infections, des inflammations et des troubles neurologiques graves peuvent survenir." } }, { "@type": "Question", "name": "Les AVC sont-ils une complication possible ?", "position": 22, "acceptedAnswer": { "@type": "Answer", "text": "Oui, une défaillance de la barrière peut augmenter le risque d'accidents vasculaires cérébraux." } }, { "@type": "Question", "name": "Des troubles cognitifs peuvent-ils se développer ?", "position": 23, "acceptedAnswer": { "@type": "Answer", "text": "Oui, des troubles cognitifs peuvent résulter d'une altération prolongée de la barrière." } }, { "@type": "Question", "name": "La démence est-elle une complication ?", "position": 24, "acceptedAnswer": { "@type": "Answer", "text": "Oui, certaines formes de démence peuvent être liées à des dysfonctionnements de la barrière." } }, { "@type": "Question", "name": "Les troubles psychiatriques sont-ils possibles ?", "position": 25, "acceptedAnswer": { "@type": "Answer", "text": "Oui, des troubles psychiatriques peuvent être exacerbés par des problèmes de barrière." } }, { "@type": "Question", "name": "Quels facteurs augmentent le risque de défaillance ?", "position": 26, "acceptedAnswer": { "@type": "Answer", "text": "L'âge avancé, les maladies auto-immunes et les infections sont des facteurs de risque." } }, { "@type": "Question", "name": "Le diabète est-il un facteur de risque ?", "position": 27, "acceptedAnswer": { "@type": "Answer", "text": "Oui, le diabète peut affecter la santé de la barrière hémato-encéphalique." } }, { "@type": "Question", "name": "L'alcoolisme influence-t-il la barrière ?", "position": 28, "acceptedAnswer": { "@type": "Answer", "text": "Oui, l'alcoolisme chronique peut endommager la barrière hémato-encéphalique." } }, { "@type": "Question", "name": "Le tabagisme est-il un risque ?", "position": 29, "acceptedAnswer": { "@type": "Answer", "text": "Oui, le tabagisme est associé à une augmentation des troubles neurologiques." } }, { "@type": "Question", "name": "Les infections virales sont-elles préoccupantes ?", "position": 30, "acceptedAnswer": { "@type": "Answer", "text": "Oui, certaines infections virales peuvent compromettre la barrière hémato-encéphalique." } } ] } ] }

Sources (10000 au total)

Immersion ultrasound improves the repeatability of shear-wave elastography for measuring median nerve elasticity.

To study the factors that influence the measurement of median nerve elasticity, to provide a more reproducible test for the assessment of median nerve elasticity using shear wave elasticity (SWE), and... Two doctors without SWE operation experience measured the median nerve mean elastic modulus (Emean) at the same position and at different time points on the right wrist of 58 healthy volunteers using ... The intraobserver and interobserver repeatability of the median nerve elasticity measured via contact SWE by inexperienced operators were classified as good, with ICCs of 0.633 (95% CI 0.380-0.783) an... Immersion ultrasound can improve the repeatability of median nerve elasticity measurements by inexperienced operators....

Value of shear wave elasticity in predicting the efficacy of neoadjuvant chemotherapy in different molecular types.

The purpose of this study was to evaluate the response to neoadjuvant chemotherapy (NAC) of different molecular subtypes of breast cancer using shear wave ultrasound elastography (SWE).... Ninety-eight patients with final diagnoses of breast cancer prior to NAC were examined with SWE and B-mode ultrasound. These parameters were compared with the response evaluation criteria in solid tum... One-way analysis of variance revealed that age, tumor margin, the change in tumor size after chemotherapy, and the average (Emean), minimum (Emin), and maximum (Emax) values from shear wave elastograp... Emax can be used to predict the response to NAC in women with invasive breast cancer, especially those with the Luminal B type and HER2 enriched type, but it cannot be used to predict pCR to NAC....

Estimating Thrombus Elasticity by Shear Wave Elastography to Evaluate Ultrasound Thrombolysis for Thrombus With Different Stiffness.

There is uncertainty about deep vein thrombosis standard treatment as thrombus stiffness alters each case. Here, we investigated thrombus' stiffness of different compositions and ages using shear wave... Shear waves generated through mechanical shaker and traveled along thrombus of different hematocrit (HCT) levels, whereas 18-MHz ultrasound array used to detect wave propagation. Thrombus' stiffness w... The estimated average SWS of 20%, 40%, and 60% HCT thrombus were 0.75 m/s, 0.44 m/s, and 0.32 m/s, respectively. For Thrombolysis, the percentage weight loss at 8 MPa Negative pressure for the same HC... SWS is inversely related to HCT level and positively related to thrombus age. High HCT thrombus had higher weight loss compared to low HCT. However, the difference between 20% and 40% HCT was more sig... Characterizing thrombus elastic property undergoing thrombolysis enables evaluation of ultrasound efficacy for fractionating thrombus and reveals the appropriate ultrasound parameters selection to ach...

Comparison of fetal and maternal tissue elasticity between euploid and aneuploid pregnancies by shear wave elastography.

B-mode ultrasonography utilized for fetal screening of common trisomies is referred to as a genetic sonogram and includes determining major abnormalities and soft markers such as hypoplastic nasal bon... The participants were all singleton pregnancies between 19 and 23 weeks of gestation; 35 euploid and 14 aneuploid fetus pregnancies were enrolled. Fetal bowel, kidney, liver, nasal bone, nuchal fold, ... The mean shear wave speed of fetal nasal bone was significantly lower in aneuploid fetuses. There was no difference between other tissues in mean shear wave velocity.... Euploid and aneuploid fetuses have different elastic properties of the nasal bone and this may have a role in differentiating aneuploid fetuses noninvasively....

Chronologic Changes in the Elastic Modulus of a Healing Achilles Tendon Rupture Measured Using Shear Wave Elastography.

Shear wave elastography (SWE) has been used to examine the elasticity of a ruptured Achilles tendon; however, the healing process of a ruptured tendon has not been studied yet. This study aimed to det... Using a prospective cohort study design, we evaluated the patients treated conservatively (conservative group) and surgically (surgical group) with the "gift-box" technique for an isolated index acute... The ruptured Achilles tendon obtained an SWE value comparable with the unruptured side at 12 weeks in the conservative group and at 4 weeks with surgical group. The surgical group had significantly hi... SWE is a convenient noninvasive method to determine the progress of the healing process after tendon injury. Our analysis using SWE has revealed the detailed chronologic changes in SWE values and rela... Level II, prospective cohort study....

Plantar flexion with inversion shows highest elastic modulus of calcaneofibular ligament using ultrasound share wave elastography.

The functional role of the calcaneofibular ligament (CFL) is still controversial. We aimed to investigate the anatomical features of the CFL on sonography and the elastic modulus of the CFL in differe... In 14 cadaveric ankles, the angle of the CFL with respect to the long axis of the fibula was measured in the following ankle positions: neutral (N), 30° plantar flexion (PF), and 20° dorsiflexion (DF)... The mean angle of the CFL in N, PF, and DF positions was 139.9° ± 12.7°, 121.3° ± 14.1°, and 158.6° ± 13.1°, respectively. The angle of the CFL in N was significantly greater than that in PF and small... The angle of the CFL increased with DF. Moreover, ultrasound SWE showed that the CFL was tensed and likely to be injured in the PI position....

Reliability of lower leg muscle elasticity using shear wave elastography in non-weight-bearing and weight-bearing.

Muscle elasticity can be quantified with shear wave elastography (SWE) and has been used as an estimate of muscle force but reliability has not been established for lower leg muscles. The purpose of t... A total of 109 recreationally active healthy adults participated. The study employed a single-cohort, same-day repeated-measures test-retest design. Elasticity, measured in kilopascals as the Young's ... Intra-rater reliability estimates were good to excellent for NWB (ICC = 0.930-0.988) and WB (ICC = 0.877-0.978) measures. Inter-rater reliability estimates were moderate to good (ICC = 0.500-0.795) fo... Despite the studies poor to good inter-rater variability, the intra-rater reproducibility represents the potential benefit of SWE in NWB and WB. Establishing the reliability of SWE with clinical and b...

In vivo assessment of the elastic properties of the external anal sphincter in term pregnant women using shear wave elastography.

The objective was to assess the intraobserver intersession and interobserver intrasession reliability of shear wave elastography applied to the external anal sphincter in term pregnant women.... This prospective study involved nulliparous pregnant women at 37 weeks or more with two visits (V1: one observer; V2 two observers) planned within a 12-h to 7-day interval. Measurements were performed... A total of 37 women were included. Intraobserver reliability was excellent at rest (ICC = 0.91 [0.84-0.95) and good during the Valsalva maneuver (ICC = 0.83 [0.72-0.90]) and contraction (ICC = 0.85 [0... Shear wave elastography is a reliable tool for assessing the elastic properties of the external anal sphincter in term pregnant women....