scholarly journals Monitoring System of Local Cortical Blood Flow during Operation

1984 ◽  
Vol 24 (12) ◽  
pp. 915-921
Author(s):  
Shigekazu TAKEUCHI ◽  
Haruhiko KIKUCHI ◽  
Jun KARASAWA ◽  
Ikuo IHARA ◽  
Tetsuo YAMASHITA ◽  
...  
Keyword(s):  
Blood Flow ◽  
Monitoring System ◽  
Cortical Blood Flow ◽  
Local Cortical Blood Flow

Vascular pressures and cortical blood flow in cavernous angioma of the brain

1990 ◽  
Vol 73 (4) ◽  
pp. 555-559 ◽  
Author(s):  
John R. Little ◽  
Issam A. Awad ◽  
Stephen C. Jones ◽  
Zeyd Y. Ebrahim
Keyword(s):  
Blood Flow ◽  
Cavernous Angioma ◽  
Sitting Position ◽  
Cortical Blood Flow ◽  
Content Type ◽  
Cavernous Angiomas ◽  
Arterial Blood ◽  
Mean Pressure ◽  
Local Cortical Blood Flow ◽  
The Brain

✓ This study was designed to investigate the hemodynamic characteristics of cavernous angiomas of the brain. Five adult patients with a cavernous angioma underwent local cortical blood flow studies and vascular pressure measurements during surgery for the excision of the cavernous angioma. Clinical presentation included headache in four patients, seizures in four patients, and recurring diplopia in one patient. Magnetic resonance imaging demonstrated the cavernous angiomas in all patients and revealed an associated small hematoma in two. Four patients with a cerebral cavernous angioma were operated on in the supine position and the remaining patient, whose lesion involved the brain stem, was operated on in the sitting position. Mean local cortical blood flow (± standard error of the mean) in the cerebral cortex adjacent to the lesion was 60.5 ± 8.3 ml/100 gm/min at a mean PaCO2 of 35.0 ± 0.6 torr. Mean CO2 reactivity was 1.1 ± 0.2 ml/100 gm/min/torr. The local cortical blood flow results were similar to established normal control findings. Mean pressure within the lesion in the patients undergoing surgery while supine was 38.2 ± 0.5 mm Hg; a slight decline in cavernous angioma pressure occurred with a drop in mean systemic arterial blood pressure and PaCO2. Mean pressure in the cavernous angioma in the patient operated on in the sitting position was 7 mm Hg. Jugular compression resulted in a 9-mm Hg rise in cavernous angioma pressure in one supine patient but no change in the patient in the sitting position. Direct microscopic observation revealed slow circulation within the lesions. The hemodynamic features demonstrated in this study indicate that cavernous angiomas are relatively passive vascular anomalies that are unlikely to produce ischemia in adjacent brain. Frank hemorrhage would be expected to be self-limiting because of relatively low driving pressures.

scholarly journals Benefits of Monitoring of Local Cortical Blood Flow During Aneurysm Surgery

1994 ◽  
Vol 22 (5) ◽  
pp. 385-388
Author(s):  
Kaichi TOKIWA ◽  
Yoshio MIYASAKA ◽  
Kenzoh YADA ◽  
Takao KITAHARA ◽  
Takashi OHWADA
Keyword(s):  
Blood Flow ◽  
Aneurysm Surgery ◽  
Cortical Blood Flow ◽  
Local Cortical Blood Flow

scholarly journals Time-Course of Cerebral Perfusion and Tissue Oxygenation in the First 6 h after Experimental Subarachnoid Hemorrhage in Rats

2009 ◽  
Vol 29 (4) ◽  
pp. 771-779 ◽  
Author(s):  
Thomas Westermaier ◽  
Alina Jauss ◽  
Jörg Eriskat ◽  
Ekkehard Kunze ◽  
Klaus Roosen
Keyword(s):  
Blood Flow ◽  
Subarachnoid Hemorrhage ◽  
Intracranial Pressure ◽  
Cerebral Perfusion Pressure ◽  
Cerebral Perfusion ◽  
Tissue Oxygenation ◽  
Perfusion Pressure ◽  
Oxygen Utilization ◽  
Cortical Blood Flow ◽  
Local Cortical Blood Flow

Present knowledge about hemodynamic and metabolic changes after subarachnoid hemorrhage (SAH) originates from neuromonitoring usually starting with aneurysm surgery and animal studies that have been focusing on the first 1 to 3 h after SAH. Most patients, however, are referred to treatment several hours after the insult. We examined the course of hemodynamic parameters, cerebral blood flow, and tissue oxygenation (ptiO2) in the first 6 h after experimental SAH. Sixteen Sprague–Dawley rats were subjected to SAH using the endovascular filament model or served as controls ( n = 8). Bilateral local cortical blood flow, intracranial pressure, cerebral perfusion pressure, and ptiO2 were followed for 6 h after SAH. After induction of SAH, local cortical blood flow rapidly declined to 22% of baseline and returned to 80% after 6 h. The decline of local cortical blood flow markedly exceeded the decline of cerebral perfusion pressure. ptiO2 declined to 57%, recovered after 2 h, and reached ≥140% of baseline after 6 h. Acute vasoconstriction after SAH is indicated by the marked discrepancy of cerebral perfusion pressure and local cortical blood flow. The excess tissue oxygenation several hours after SAH suggests disturbed oxygen utilization and cerebral metabolic depression. Aside from the sudden increase of intracranial pressure at the time of hemorrhage and delayed cerebral vasospasm, the occurrence of acute vasoconstriction and disturbed oxygen utilization may be additional factors contributing to secondary brain damage after SAH.

Effects of Ethanol on EEG and Cortical Blood Flow in the Cat

1968 ◽  
Vol 29 (4) ◽  
pp. 828-838 ◽  
Author(s):  
A. A. Hadji-Dimo ◽  
R. Ekberg ◽  
D. H. Ingvar
Keyword(s):  
Blood Flow ◽  
Cortical Blood Flow
Sign in / Sign up

Export Citation Format

Share Document