Sökning: "Autoregulation"

Visar resultat 1 - 5 av 27 avhandlingar innehållade ordet Autoregulation.

  1. 1. 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 :MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; 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

  2. 2. Endothelial Nitric Oxide in the Control of Glomerular Hemodynamics

    Författare :János Pittner; Daniel H. Casellas; Uppsala universitet; []
    Nyckelord :MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Cell biology; Juxtamedullary nephron; afferent arteriole; nitric oxide; endothelial calcium; diaminofluoresceins; fura-2; autoregulation; shear stress; flow; videomicroscopy; Cellbiologi; Cell biology; Cellbiologi; Physiology; fysiologi;

    Sammanfattning : The afferent arteriole of the kidney is a unique vascular segment: it is the effector of the renal hemodynamic autoregulation. The use of the isolated, perfused juxtamedullary nephron preparation makes it possible to visualize the afferent arteriole while preserving its tissue surroundings and the functional integrity of the nephron. LÄS MER

  3. 3. Aspects on Mechanisms, Treatment and Outcome in Severe Traumatic Brain Injury

    Författare :Teodor Svedung Wettervik; Anders Lewén; Per Enblad; Elham Rostami; Lars-Owe Koskinen; Uppsala universitet; []
    Nyckelord :MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Autoregulation; clinical outcome; energy metabolism; multimodality monitoring; neurointensive-care; traumatic brain injury; Neurokirurgi; Neurosurgery;

    Sammanfattning : Traumatic brain injury (TBI) is a leading cause for mortality and morbidity worldwide. The primary injury has great impact on patient outcome and cannot be cured, but attentive neurointensive care (NIC) may reduce detrimental secondary brain injuries and is the focus of this thesis. LÄS MER

  4. 4. 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

  5. 5. Cerebral Hemodynamics through Intracrnial Pressure

    Författare :Sima Shahsavari; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; MEDICIN OCH HÄLSOVETENSKAP; ENGINEERING AND TECHNOLOGY; MEDICAL AND HEALTH SCIENCES; Intracranial dynamics; Baroreceptor reflex; Secondary brain injury; Traumatic brain injury; Collapsible tubes; Intracranial pressure; Cushing reflex; Pulse wave propagation; Cerebral autoregulation; Cerebral compliance; Mathematical modelling;

    Sammanfattning : Traumatic Brain Injury (TBI) continues to be a major problem worldwide. Today, intensive care of patients with TBI is mainly focused on preventing and treating secondary brain injuries. High pressure inside the intracranial cavity has been found to be an important feature of disturbed cerebral dynamics and secondary injuries. LÄS MER