| Simulation study on bypass and therapeutic occlusion in the posterior circulation. | |
| | |
MedLine Citation:
|
PMID: 7754845 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
A hydraulic vascular model of the vertebrobasilar artery with an autoregulatory mechanism was constructed. The haemodynamic effect of superficial temporal artery (STA)-posterior cerebral artery (PCA) bypass was investigated in cases of bilateral vertebral artery (VA) occlusion and basilar artery (BA) occlusion. Assuming therapeutic BA occlusion for basilar bifurcation aneurysms, the flow volume through the P1 segment of the PCA was determined in relation to diameters of the posterior communicating artery (PCom). The bypass increases both flow volume and intraluminal pressure in the presence range below 60 mm Hg, while it increases only pressure in the autoregulatory range above 60 mm Hg. Its haemodynamic effect is more marked in BA occlusion than in VA occlusion. The averaged values of the increase in flow volume are 29.0 +/- 4.3% (mean +/- SD) and 16.5 + 1.0%, respectively. The total flow volume increase of the vertebrobasilar system is usually lower than the flow volume measured at the bypassed STA. The difference between the two is equal to the simultaneous decrease in flow volume through the PComs. Flow volume through the P1 segment can be expressed as a function of the PComs diameter ratio squared. A hydraulic simulation study will be useful for speculating on the haemodynamic effects of these operative procedures. |
| | |
Authors:
|
S Nagasawa; T Ohta; H Kikuchi; S Nagayasu |
Related Documents
:
|
8541665 - Sterilization with methyl cyanoacrylate-induced fallopian tube occlusion from a nonsurg... 9155755 - Chronic coronary occlusions: age, morphology and chance of reopening. 7878075 - Beneficial effects of bay u3405, a novel thromboxane a2 receptor antagonist, in splanch... 4069335 - Resolving occlusive lesions of the basilar artery. 17026915 - Rupture of a popliteal artery aneurysm 10 years after surgical repair. 15377135 - Transcatheter closure of coronary artery fistulas. |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: Acta neurochirurgica Volume: 132 ISSN: 0001-6268 ISO Abbreviation: Acta Neurochir (Wien) Publication Date: 1995 |
Date Detail:
|
Created Date: 1995-06-21 Completed Date: 1995-06-21 Revised Date: 2009-11-11 |
Medline Journal Info:
|
Nlm Unique ID: 0151000 Medline TA: Acta Neurochir (Wien) Country: AUSTRIA |
Other Details:
|
Languages: eng Pagination: 120-6 Citation Subset: IM |
Affiliation:
|
Department of Neurosurgery, Osaka Medical College, Takatsuki, Japan. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Basilar Artery
/
physiopathology Blood Flow Velocity / physiology Blood Pressure / physiology Blood Volume / physiology Brain / blood supply* Cerebral Revascularization* Homeostasis / physiology* Humans Models, Cardiovascular* Postoperative Complications / physiopathology* Vertebral Artery / physiopathology Vertebrobasilar Insufficiency / physiopathology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Intracerebral inflammatory response to experimental brain contusion.
Next Document: The combined pterional and orbitocygomatic approach to extensive tumours of the lateral and latero-b...