The CBF-PaCO2 relationship curves in chronic cerebrovascular disease
نویسندگان
چکیده
منابع مشابه
Stable xenon CT CBF measurements in prevalent cerebrovascular disorders (stroke).
Local cerebral blood flow (LCBF) and local tissue: blood partition coefficient (L lambda) values were measured for small volumes of gray or white matter by CT CBF. Single compartment analysis was used but fitted to infinity in normal volunteers aged between 20 to 100 years (N = 20). Hemispheric LCBF and L lambda values were compared to those of 61 age matched patients with transient ischemic at...
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The alterations in cerebral perfusion with graded hypercapnia were measured in the baboon using the intra-carotid xenon clearance technique. In addition, the tidal percent of COj and the blood flow in the common carotid artery were measured using a capnograph and an electromagnetic flowmeter respectively. The delay times between the induced increments in tidal respiratory percent of CO] and the...
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Introduction: Pulmonary hyperinflation in patients with chronic obstructive pulmonary disease (COPD) can increase the breathing rate and reduce diaphragmatic movements by pushing the diaphragms downward and limiting their movements; this, in fact, can affect the breathing process. The purpose of this study was to compare diaphragmatic movements in COPD patients and healthy ones and to evaluate ...
متن کاملAbnormal cerebrovascular response to altered PaCO2 in baboons with obstructive jaundice.
The cerebrovascular response to hypercapnia and hyperventilation was studied in normal and jaundiced baboons by the intracarotid 133Xe injection technique. The baboons with bile duct ligation were found to have decreased CBF at all levels of PaCO2. This difference between normal and jaundiced baboons was 13% at normocapnia rising to 33% with hypercapnia and 37% with hypocapnia. The CBF values a...
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Disruptions of the blood-brain barrier (BBB) and edema formation both play key roles in the development of neurological dysfunction in acute and chronic cerebral ischemia. Animal studies have revealed the molecular cascades that are initiated with hypoxia/ischemia in the cells forming the neurovascular unit and that contribute to cell death. Matrix metalloproteinases cause reversible degradatio...
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ژورنال
عنوان ژورنال: Nosotchu
سال: 1987
ISSN: 0912-0726,1883-1923
DOI: 10.3995/jstroke.9.28