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Tcd - DOAJ

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Last Updated: 17 January 2023

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PFO morphology for evaluation of c-TCD and c-TTE RLS grades

According to the morphological characteristics of PFO, 124 patients with PFO were divided into four groups. PFO was divided into four groups: 55 cases with smooth uniform tubular tunnel, 21 cases with granule uniform tubular tunnel, 23 cases of right funnel form, 25 cases of left funnelform, and 25 cases of left funnelform were divided into four groups: The 124 cases of PFO were divided into four groups: 55 cases with smooth uniform tubular tunnel, 23 cases with granular tunnel, 23 cases with granule uniform tubular tunnel, 25 cases of left funnelform, and 25 cases of left funnel tunnel t.

Source link: https://doi.org/10.1186/s40001-022-00855-0


Cerebral hemodynamic changes in patients with severe carotid stenosis pre and post CEA or CAS monitored through TCD

BHT and CVR estimation using TCD has been emphasized by doctors who experience uni/bilateral symptomatic/asymptomatic severe carotid stenosis in patients with acute or chronic ischemic stroke pre- and post interventional. Following endarterectomy or stent placement, 30 patients with severe carotid stenosis over 70% have been screened for the following endarterectomy or stent placement. In both experimental and postoperative studies compared to pre-war stenosis results, ipsilateral and cerebral stenosis increased from 31. 01 +/-5. 53 cm / s before surgery, as well as contralateral to stenosis, from 36. 79 +/-0. 16 to 0. 89 +/-0. 13 to 0. 81 + / 0. 19 / -0. 16 to 0. 1 + / -0. 13 to 0. 83 + / steno angi, steno / steno sis / steno stenosis / Mean flow velocities at MCA increased dramatically 2 months after CEA/CAS surgery, with slightly improved contralateral to carotid stenosis and after CAS, with marginally greater velocities at MCA. Despite the carotid atheromatosis degree contralateral to severe carotid stenosis, he showed significant improvements after endarterectomy or stent, with no difference between 72 hours and two months post intervention.

Source link: https://doi.org/10.37897/RJN.2013.4.6


Evaluation on the application of transcranial Doppler (TCD) and electroencephalography (EEG) in patients with vertebrobasilar insufficiency

Abstract Background The aim of this study was to determine the diagnostic value of transcranial Doppler and electroencephalography in patients with vertebrobasilar insufficiency during clinical diagnosis and therapy of VBI in our hospital from June 2018 to December 2019 by randomly selected participants, and 80 healthy people from the same period were chosen as the control group. The two groups were compared in terms of their abnormal rate, main outcome, and findings, as well as the peak rate of blood circulation and vertebrobasilar artery blood flow. Comparisons The abnormal rate of EEG and TCD in VBI patients was 38. 7 percent and the 93. 7 percent, respectively. Conclusions: Thyroid testing is particularly sensitive to the degree and pattern of cerebral ischemia in VBI patients, according to the authors. The changes in brain cell function following cerebral ischemia will be determined by an electrometric examination.

Source link: https://doi.org/10.1186/s13018-020-01915-z


Asymmetric TCD Findings in Malignant MCA Infarction, Resolution after Decompressive Hemicraniectomy: A Case Report

Transcranial Doppler is a non-invasive way to determine cerebral hemodynamics in the acute phase of stroke. Infarction of a 33-year-old man who appeared with a massive left hemispheric infarct has mutated into a u201cmalistic man. TCD was used to monitor intracranial hemodynamics, but the clinical and neuroimaging findings were used to inform us that we should go forward with decompressive craniectomy. The subsequent but smaller rise in the PI in the contralateral MCA was suggestive of significant intracranial pressure from massive brain swelling, suggesting a lot of intracranial pressure. The TCD findings may be traced to the MCA's subsequent spontaneous decanalization, occlusion of the MCA with subsequent recanalization due to the DC, or initial occlusion and subsequent pressure pressures on the MCA's arterioles, which was relieved by DC.

Source link: https://doi.org/10.1159/000508589


Theoretical studies on a (FGPM) system with Gaussian profile for a zero TCD SAW devices

In this study, we investigated the propagation of surface wave in a functionally graded piezoelectric material layer ZnO/AlN/ZnO on a u03b1-Al2O3 substrate. The effect of buffer layer thickness on the temperature coefficient of delay is investigated. For the /R-Al2O3 structure, we show that for the second mode, the highest coupling coefficient is related to a phase velocity of as well as a TCD of 3.

Source link: https://doi.org/10.1016/j.rinp.2016.12.046


Quantitative GC–TCD Measurements of Major Flatus Components: A Preliminary Analysis of the Diet Effect

Flatus composition remains largely unexplored, due to diet and digestive disorders. This paper discusses a way to quantitatively identify the key gases in flatus and their use in a nutritional intervention. We show how to convert sample flatus into Tedlar bags and simultaneous analysis by gas chromatographyu2013thermal conductivity determination. The reported method determines simultaneous determination of the five key gases with root mean measurement errors of 0. 8 percent for oxygen, 0. 9% for nitrogen, 0. 9% for methane, 0. 19 for hydrogen, and 0. 6% for hydrogen.

Source link: https://doi.org/10.3390/s22030838


Location of the internal carotid artery and ophthalmic artery segments for non-invasive intracranial pressure measurement by multi-depth TCD

In the case of locate segments, the aim of the present research was to locate the ophthalmic artery by using the inside of the internal carotid artery as the reference depth in order to perform a reliable non-invasive intracranial pressure measurement by using a multi-depth transcranial Doppler device and then determine the positions and angles of ultrasonic transducer on the closed eyelid. For HVs, the mean depth of the uncovered ICA edge for HTG patients was 64. 3 mm and 66. 3 mm. For HVs, the mean depth of the chosen IOA segment was 59. 2 mm and 59. 3 mm. For HVs, the mean depth of the selected EOA segment was 48. 5 mm and 49. 8 mm. Using the edge of the ICA as a reference point, we demonstrated that finding the IOA and EOA segments can be achieved.

Source link: https://doi.org/10.1080/19932820.2017.1384290

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions