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Search Results: 1 - 10 of 2827 matches for " transcranial ultrasound "
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Valor diagnóstico de la ecografía Doppler transcraneal en oftalmología
Navarro Scott,Mayelín; Recasens Cáceres,Alina; Lamas ávila,Ana;
MEDISAN , 2011,
Abstract: transcranial doppler ultrasound in ophthalmology is a noninvasive study of intracranial ocular vessels, useful not only as a selective scanning test, but also as a tool to evaluate the extent and severity of arterial disease. its uses in ophthalmology are numerous, although in most cases it is indicated to specify the changes of the blood flow in diabetic patients with retinopathy o without it. given the importance that in recent years vascular abnormalities have acquired in the genesis of some ocular conditions, particularly in glaucoma, it is decided to review the literature on that ultrasonic technique to highlight its radiodiagnostic value in ophthalmology.
El accidente vascular encefálico en ni?os con drepanocitosis
Svarch,Eva;
Revista Cubana de Hematolog?-a, Inmunolog?-a y Hemoterapia , 2009,
Abstract: stroke is one of the more severe complications of drepanocytemia. it appears mainly in the first decade of life, with a trend to recurrence, and with cognitive and neurologic permanents. its optimal prevention and treatment are not accurately established, but nowadays, the more used strategies with better results are the red-blood cell transfusions and the hydroxyurea. transcranial doppler ultrasound (tcus) is an usefulness and safe method to predict stroke in many patients.
Transcranial Doppler Ultrasound Examination Of The Circulation Of Cerebral Arteries –Case Report
Sinisa Djuricic,Milovan Savic,Sanja Slavujevic,Cedomir Jacimovic
Aktuelnosti iz Neurologije, Psihijatrije i Grani?nih Podru?ja , 2011,
Abstract: Use of the noninvasive Doppler Ultrasound examination method for diagnostics of cerebral circulation is very common because it allows quick evaluation; it is cost efficient and easy to use. It represents the imperative in diagnostics, caretaking, monitoring and treatment of patients with different vascular disorders of the brain, as well as in the prospective treatment of patients with a risk of stroke. In this paper described is the use of Transcranial Doppler (TCD) method in the research of cerebral arteries circulation, at the department of neurology in Doboj General Hospital. A total of 114 patients was examined (66 men and 48 women), mean age 61.5 for men and 60.5 years for women. According to the diagnostics of the resident doctors, the frequency structure for neurological disorders was dizziness with or without instability, and the occurrence of tinnitus for 46 patients (40.35%), for 28 patients (24.56%) it was VB insufficiency with or without signs of the brain stem damage, for 20 of them (17.54%) the main symptom was headache, for 12 patients (10.53%) were the stroke symptoms or the consciousness disturbances, while in 8 cases (7.02%) sought answers about the nature of disorder on the basis of TCD examination. Pathology findings was found in 16 patients (11 women and 5 men), out of which four were referred for additional magnetic-resonance testing and MR angiography: three were examined completely with confirmed diagnostics of TCD examination. Presented in this paper is a patient with von Reklinghausen's disease, Arachnoid cysts on both sides and changes on extra and endocrinal brain arteries. Our initial experience with this method of testing the cerebral arteries function proved to be practically usable and very useful in diagnostics, and according to the complexity of the disorder for indicating of the additional diagnostics and determining its treatment.
Assessment of cerebrovascular reactivity during major depression and after remission of disease
Vakilian Alireza,Iranmanesh Farhad
Annals of Indian Academy of Neurology , 2010,
Abstract: Background: There are a growing number of studies suggesting that depression may increase the risk of stroke. Impaired autoregulation of vascular tone may contribute to a higher risk of developing cerebrovascular diseases. Cerebrovascular reactivity (CVR) reflects the compensatory dilatory capacity of cerebral arterioles to a dilatory stimulus and is an important mechanism that ensures constant cerebral blood flow. There is a hypothesis that CVR is reduced in major depression, which would explain the association between depression and stroke. Objectives: The aim of this study was to investigate the effect of depression on CVR in cerebral vessels by comparing CVR during the depression phase with that during remission. Material and Methods: Using the apnea test, we assessed CVR in 16 patients with unipolar depression during disease and after remission of disease by calculating the increase in cerebral blood flow velocity after breath-holding (the apnea test). Blood flow velocities were measured by transcranial Doppler ultrasound (TCD). Results: CVR was significantly reduced in the depression phase in comparison to that in the remission phase. However, this change was not seen in all the patients. Conclusion: CVR was reduced in most of the depressed patients. The decreased CVR, as indicated by the changes in peak systolic velocity (PSV) and mean flow velocity (MFV) of the middle cerebral artery, in depressed patients was more marked on the right side, which could point to a vascular basis for some kinds of depression. We recommend that other studies, with larger samples, be done; future studies should assess whether the changes in the CVR varies with the severity and type of depression.
Ultrasonografía doppler transcraneal urgente: utilidad predictiva del vasoespasmo sintomático en la hemorragia subaracnoidea espontánea en pacientes con buena situación neurológica
Mu?oz-Sánchez,M.A.; Murillo-Cabezas,F.; Egea-Guerrero,J.J.; Gascón-Castillo,M.L.; Cancela,P.; Amaya-Villar,R.; Rincón-Ferrari,M.D.; Flores-Cordero,J.M.; Cayuela,A.; García-Alfaro,C.;
Medicina Intensiva , 2012, DOI: 10.1016/j.medin.2012.01.013
Abstract: purpose: to examine the predictive value of an early transcranial doppler ultrasound (tcd) study performed in the emergency department in patients with spontaneous subarachoniod hemorrhage (sah) in good neurological condition, in order to know which patients are at high risk of developing delayed cerebral ischemia (dci). design: a descriptive observational study was carried out involving a period of 3 years. setting: critical care and emergency department. patients: the study consecutively included patients with sah of grade i-iii on the hunt and hess scale. variables of interest: dci (decrease of 2 points in gcs or focal deficit), mean velocity (mv) of middle cerebral arteries (mca), lindegaard index (il). sonographic vasospasm pattern (svp) was considered if mca-mv>120cm/sc and il>3. results: the mean age of the 122 patients was 54.1±13.7 years; 57.3% were women. svp was detected in 24 patients (19.7%), although high velocities patterns (hvp) were present in 38 patients (31.1%). dci developed in 21 patients (mv183+/-49cm/sc), all with previous svp. in this group mv increased 22+/-5cm/sc/day during the first 3 days. the group without hvp (84 patients/mv of 67+/-16.6cm/sc), compared with dci group, showed differences in highest mv (p<0.001), and also δmv/day (8.30+/-4,5cm/sc vs 22+/-5cm/sc) during the first 3 days (p=0.009). in our series, roc analysis selected the best cut-off value for δmv/day as 21cm/sc (p<0.001). conclusion: during the first 3 days, an increase of 21cm/s/24h in mca-mv was associated with the development of symptomatic vasospasm. tcd is a useful tool for the early detection of patients at risk of dci after sah.
No population bias to left-hemisphere language in 4-year-olds with language impairment
Dorothy V.M. Bishop,Georgina Holt,Andrew J.O. Whitehouse,Margriet Groen
PeerJ , 2015, DOI: 10.7717/peerj.507
Abstract: Background. An apparent paradox in the field of neuropsychology is that people with atypical cerebral lateralization do not appear to suffer any cognitive disadvantage, yet atypical cerebral lateralization is more common in children and adults with developmental language disorders. This study was designed to explore possible reasons for this puzzling pattern of results.
Neurosonological examination: A non-invasive approach for the detection of cerebrovascular impairment in AD
Barbora Urbanova,Ales Tomek,Robert Mikulik,Hana Magerova,Daniel Horinek,Jakub Hort
Frontiers in Behavioral Neuroscience , 2014, DOI: 10.3389/fnbeh.2014.00004
Abstract: There has been a growing interest in vascular impairment associated with Alzheimer’s disease (AD). This interest was stimulated by the findings of higher incidence of vascular risk factors in AD. Signs of vascular impairment were investigated notably in the field of imaging methods. Our aim was to explore ultrasonographic studies of extra- and intracranial vessels in patients with AD and mild cognitive impairment (MCI) and define implications for diagnosis, treatment and prevention of the disease. The most frequently studied parameters with extracranial ultrasound are intima-media thickness in common carotid artery, carotid atherosclerosis, and total cerebral blood flow. The transcranial ultrasound concentrates mostly on flow velocities, pulsatility indices, cerebrovascular reserve capacity, cerebral microembolization. Studies suggest there is morphological and functional impairment of cerebral circulation in AD compared to healthy subjects. Ultrasound as a non-invasive method could be potentially useful in identifying individuals in a higher risk of progression of cognitive decline.
Valor diagnóstico de la ecografía Doppler transcraneal en oftalmología Diagnostic value of transcranial Doppler ultrasound in ophthalmology
Mayelín Navarro Scott,Alina Recasens Cáceres,Ana Lamas ávila
MEDISAN , 2011,
Abstract: La ecografía Doppler transcraneal oftálmica es el estudio no invasivo de los vasos oculares intracraneales, útil no solo como prueba de exploración selectiva, sino también como instrumento para valorar la extensión y gravedad de las enfermedades arteriales. Sus usos en el campo oftalmológico son múltiples, aunque en la mayoría de los casos se indica para precisar los cambios del flujo sanguíneo en pacientes diabéticos, con retinopatía o sin ella. Dada la importancia que en los últimos a os han ido adquiriendo las alteraciones vasculares en la génesis de algunas afecciones oculares, particularmente en el glaucoma, se decidió revisar la bibliografía médica sobre esa técnica de ultrasonidos para destacar su valor radiodiagnóstico en oftalmología. Transcranial Doppler ultrasound in ophthalmology is a noninvasive study of intracranial ocular vessels, useful not only as a selective scanning test, but also as a tool to evaluate the extent and severity of arterial disease. Its uses in ophthalmology are numerous, although in most cases it is indicated to specify the changes of the blood flow in diabetic patients with retinopathy o without it. Given the importance that in recent years vascular abnormalities have acquired in the genesis of some ocular conditions, particularly in glaucoma, it is decided to review the literature on that ultrasonic technique to highlight its radiodiagnostic value in ophthalmology.
El accidente vascular encefálico en ni os con drepanocitosis Stroke present in children presenting drepanocytemia
Eva Svarch
Revista Cubana de Hematolog?-a, Inmunolog?-a y Hemoterapia , 2009,
Abstract: El accidente vascular encefálico (AVE) es una de las complicaciones más graves de la drepanocitosis. Se presenta, sobre todo, en la primera década de la vida, tiene tendencia a recurrir y puede dejar secuelas neurológicas y cognoscitivas permanentes. Su prevención y tratamiento óptimos no se han establecido con precisión, pero en el momento actual, los que más se utilizan con buenos resultados son las transfusiones de glóbulos rojos y la hidroxiurea. El ultrasonido doppler transcraneal (UDTC) es un método útil y no invasivo para predecir el AVE en un número grande de pacientes. Stroke is one of the more severe complications of drepanocytemia. It appears mainly in the first decade of life, with a trend to recurrence, and with cognitive and neurologic permanents. Its optimal prevention and treatment are not accurately established, but nowadays, the more used strategies with better results are the red-blood cell transfusions and the hydroxyurea. Transcranial Doppler ultrasound (TCUS) is an usefulness and safe method to predict stroke in many patients.
ULTRASONOGRAFIA – O TEHNIC A CLINICIANULUI? Ultrasound - a clinicial technique?
Catalina Mihai,,Cristina Cijevschi Prelipcean
Jurnalul de Chirurgie , 2012,
Abstract: Dac endoscopia este considerat tradi ional o tehnic a gastroenterologului,ultrasonografia a fost ntotdeauna oinvestiga ie controversat , pe care i-audisputat-o specialit i variate, de la medicin de familie la radiologie, endocrinologie,cardiologie, ginecologie, chirurgie, medicin de urgen etc. Progresele s-au succedatrapid, de la descoperirea principiuluipiezoelectric n 1880 de c tre fra ii Curie, laimagini 1D, 2D, 3D, 4D, la tehniciecoendoscopice i proceduri interven ionale[2]. Ieftin , accesibil , non-invaziv ,repetabil , oferind multiple informa ii asupraorganelor interne, ecografia a devenit ast ziaproape parte integrant a oric rei examin riclinice n SUA, Asia i majoritatea riloreuropene vorbitoare de limb englez ,ultrasonografia abdominal este practicat de radiologi, n compartimente specializate. n Germania i alte ri europene vorbitoarede limb german , ca i n Romania,ecografia este efectuat de medicii clinicienidin specialit i variate. Ambele puncte devedere pot fi sus inute de argumentemultiple. Radiologii au tradi ie i experien (tehnica a fost dezvoltat n serviciiradiologice, primele studii i primele tratateau fost publicate de radiologi) precum i opreg tire temeinic care include no iuniaprofundate de anatomie, fizic , imagistic medical [3]. n schimb, clinicianul areavantajul de a putea integra datele ob inute n contextul clinic, biologic i al celorlalteinvestiga ii ale pacientului, ceea cefaciliteaz algoritmul diagnostic
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