A noninvasive estimation of cerebral perfusion pressure using critical closing pressure
نویسندگان
چکیده
منابع مشابه
Cerebral vasospasm affects arterial critical closing pressure.
The effect of cerebral vasospasm (CVS) after aneurysmal subarachnoid hemorrhage (SAH) on critical closing pressure (CrCP) has not been fully delineated. Using cerebral impedance methodology, we sought to assess the behavior of CrCP during CVS. As CrCP expresses the sum of intracranial pressure (ICP) and vascular wall tension, we also explored its role in reflecting changes in vascular tone occu...
متن کاملCritical closing pressure explains cerebral hemodynamics during the Valsalva maneuver.
The Valsalva maneuver (VM), a voluntary increase in intrathoracic pressure of approximately 40 mmHg, has been used to examine cerebral autoregulation (CA). During phase IV of the VM there are pronounced changes in mean arterial blood pressure (MABP), pulse interval, and cerebral blood flow (CBF), but the changes in CBF are of a much greater magnitude than those seen in MABP, a finding to date a...
متن کاملLimitations in estimating critical closing pressure by noninvasive blood pressure measurements.
Limitations in Estimating Critical Closing Pressure by Noninvasive Blood Pressure Measurements To the Editor: We read with interest the article by Aaslid et al, describing the dynamic pressure-flow velocities relationships in the human cerebral circulation.1 The authors help to validate estimates of critical closing pressure (CCP) based on regular heartbeat data against long diastole determinat...
متن کاملNoninvasive estimation of intracranial pressure using TCD
Usefulness of transcranial Doppler-derived cerebral hemodynamic parameters in the noninvasive assessment of intracranial pressure. Author Wakerley BR1, Kusuma Y, Yeo LL, Liang S, Kumar K, Sharma AK, Sharma VK. Content/Summary Abstract BACKGROUND: Transcranial Doppler (TCD) ultrasonography is a noninvasive bedside tool that can evaluate cerebral blood flow hemodynamics in major intracranial arte...
متن کاملNoninvasive estimation of cerebral perfusion pressure with transcranial Doppler ultrasonography in traumatic brain injury.
AIM In traumatic brain injury (TBI) patients, to overcome the secondary insults, cerebral perfusion pressure (CPP) oriented therapy is recommended. The study is assigned to estimate CPP values with middle cerebral artery (MCA) flow velocities measured noninvasively using transcranial Doppler ultrasonography (TCD). MATERIAL AND METHODS Forty-seven TBI patients were studied. Intracranial pressu...
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ژورنال
عنوان ژورنال: Journal of Neurosurgery
سال: 2015
ISSN: 0022-3085,1933-0693
DOI: 10.3171/2014.10.jns14613