A.198 Quantitative assessment of cerebral autoregulation using transcranial Doppler ultrasonography
نویسندگان
چکیده
منابع مشابه
Cerebral autoregulation in stroke: a review of transcranial Doppler studies.
BACKGROUND AND PURPOSE Cerebral autoregulation may become impaired after stroke. To provide a review of the nature and extent of any autoregulation impairment after stroke and its course over time, a technique allowing repeated bedside measurements with good temporal resolution is required. Transcranial Doppler (TCD) in combination with continuous blood pressure measurements allows noninvasive ...
متن کاملCerebral autoregulation in orthostatic hypotension. A transcranial Doppler study.
BACKGROUND AND PURPOSE Transcranial Doppler measurements of blood flow velocity permit an assessment of variations in intracranial hemodynamics in response to acute arterial pressure variations. The purpose of this study was to scan healthy volunteers and patients with autonomic failure for differences in cerebral hemodynamic patterns under an acute hypotensive stimulus. METHODS We used trans...
متن کاملAssessment of cerebral autoregulation dynamics from simultaneous arterial and venous transcranial Doppler recordings in humans.
We investigated the validity of transcranial Doppler recordings for the analysis of dynamic responses of cerebral autoregulation. We found no significant differences in percentage changes among maximal (centerline) blood flow velocity, cross-sectional mean blood flow velocity, and signal power-estimated blood flow during 24-mm Hg stepwise changes in arterial blood pressure. We investigated bloo...
متن کاملCerebral monitoring during carotid endarterectomy by transcranial Doppler ultrasonography
PURPOSE To evaluate the efficacy and safety of cerebral monitoring by transcranial Doppler ultrasonography (TCD) for the detection of cerebral ischemia during carotid endarterectomy (CEA). METHODS From August 2004 to December 2013, 159 CEAs were performed in a tertiary hospital. All procedures were performed under general anesthesia. Intraoperative TCD was routinely used to detect cerebral is...
متن کاملTranscranial Doppler Ultrasonography in Patient With Tight Right Middle Cerebral
Ultrasound examination of the extracranial carotid and vertebral arteries has been used for many years to diagnose and manage patients with cerebrovascular disease. However, evaluation of the intracranial circulation has until now required angiography. Extracranial ultrasound examinations utilize probe frequencies ranging from 3 to 10 MHz. These frequencies are unable to penetrate bone sufficie...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: British Journal of Anaesthesia
سال: 1996
ISSN: 0007-0912
DOI: 10.1016/s0007-0912(18)31053-5