Sökning: "Cerebral perfusion pressure"

Visar resultat 16 - 20 av 38 avhandlingar innehållade orden Cerebral perfusion pressure.

1. 16. Electroosmosis Based Treatment Approach for Cerebral Edema

   Författare :Teng Wang; Xiaogai Li; Svein Kleiven; Tiit Illimar Mathiesen; KTH; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Cerebral edema; electroosmosis based treatment; finite element head model; electroosmotic flow; Technology and Health; Teknik och hälsa;

   Sammanfattning : Cerebral edema characterized as an abnormal accumulation of excess fluid in the intracellular or extracellular spaces has not been treated effectively despite aggressive treatments. As a result, cerebral edema often leads to intracranial pressure (ICP) elevation with potentially severe consequences unless treated effectively. LÄS MER

3. 17. The cerebral circulation in preeclampsia : abnormalities in autoregulation and perfusion

   Författare :Michael A Belfort; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :preeclampsia; eclampsia; autoregulation; cerebral perfusion pressure; Doppler; central retinal artery; ophthalmic artery; middle cerebral artery; magnesium sulfate; nimodipine; headache; scotomata;

   Sammanfattning : Background: Eclampsia continues to be a major cause of maternal death. Abnormal cerebral blood flow and autoregulation may play an important role in the causation. Doppler ultrasound now allows assessment of the pathophysiology of preeclampsia, and the mechanisms of action of drugs used to treat it. LÄS MER

4. 18. Advancements in DSC and BOLD perfusion imaging: Acquisition, analysis and clinical application

   Författare :Jonathan Arvidsson; Göteborgs universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Magnetic Resonance Imaging; Cerebral Blood Flow; Cerebral Blood Volume; Time To Peak; Biophysical modelling; Signal representation; MRI;

   Sammanfattning : This thesis is focused on perfusion MRI techniques and topics related to image acquisition, analysis and clinical applications. The first half of the thesis is focused on dynamic susceptibility contrast (DSC) MRI, a technique which is based on the contrast enhancements caused by an intravenously administered paramagnetic contrast agent. LÄS MER

5. 19. Pressure autoregulation of cerebral blood flow in traumatic brain injury and aneurysmal subarachnoid hemorrhage

   Författare :Ulf Johnson; Per Enblad; Lars-Owe Koskinen; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; cerebral blood flow; autoregulation; traumatic brain injury; subarachnoid hemorrhage; Neurosurgery; Neurokirurgi;

   Sammanfattning : The ability of the brain to keep a stable and adequate cerebral blood flow (CBF) independently of fluctuations in systemic blood pressure is referred to as cerebral pressure autoregulation (CPA). When the brain is injured by trauma or hemorrhage, this ability may be impaired, leaving the brain vulnerable to events of high or low blood pressure. LÄS MER

7. 20. Brain Tissue Oxygenation in Traumatic Brain Injury : Experimental and Clinical Studies

   Författare :Karlis Purins; Anders Lewén; Per Enblad; Oliver Sakowitz; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Brain tissue oxygenation; Cerebral metabolism; Traumatic brain injury; Cerebral ischemia; Threshold levels; Neurovent-PTO; Microdialysis; Neurosurgery; Neurokirurgi;

   Sammanfattning : Traumatic brain injury (TBI) is a major cause of death and disability. TBI is frequently followed by cerebral ischemia which is a great contributor to secondary brain damage. The main causes of cerebral ischemia are pathophysiological changes in cerebral blood flow and metabolism. LÄS MER