Journal of clinical ultrasound : JCU
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Comparative Study
Reduced flow velocity in the internal carotid artery independently of cardiac hemodynamics in patients with cerebral ischemia.
To retrospectively investigate the relationships between carotid flow velocities, clinical features and cardiac hemodynamics to assess the meaning and significance of reduced carotid flow velocities in patients with cerebral ischemic symptoms. ⋯ Cardiac hemodynamics and carotid flow velocities are significantly related, only on the left side, probably due to larger hemodynamic stress. Increased intracerebral circulatory resistance is probably involved in the decrease in carotid flow velocity and increase in PI in patients with cerebral ischemic symptoms.
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To evaluate the accuracy of transcranial Doppler (TCD) sonography using different criteria for predicting cerebral infarction due to symptomatic vasospasm. ⋯ Vasospasm on TCD was found to be predictive of symptomatic cerebral infarction on CT, but its positive predictive value remained low despite the adoption of restrictive TCD criteria for vasospasm.
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We describe the case of a 68-year-old woman who presented with an arteriovenous fistula (AVF) between the common carotid artery and internal jugular vein following several failed attempts of right jugular catheter insertion. Sonographic examination revealed an AVF between both vessels with a high-velocity turbulent flow inside and an arterialized waveform in the jugular vein. Angiography confirmed the sonographic findings, and endovascular treatment was performed with a covered stent.
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Tuberculosis of the thyroid gland is very rare, with an acute abscess formation being the least common form of presentation. We report the sono-graphic features of two cases of tuberculous thyroid abscess that were confirmed via ultrasound-guided fine needle aspiration biopsy.
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Ceftriaxone is known to induce reversible precipitations, known as pseudolithiasis, in the gallbladder and urinary tract. The aim of this study was to investigate the incidence and predisposing factors that contribute to this side effect. ⋯ Biliary pseudolithiasis (and infrequently nephrolithiasis) usually occurs in children receiving high doses of ceftriaxone. It is generally asymptomatic. When this reversible complication becomes symptomatic, unnecessary cholecystectomy should be avoided.