Relationship between hemispheric cerebral blood flow, central conduction time, and clinical grade in aneurysmal subarachnoid hemorrhage
| Autor: | Mikio Suzuki, Jacob Rosenstein, Alexander D. Wang, Lindsay Symon |
|---|---|
| Rok vydání: | 1985 |
| Předmět: |
Adult
Male Subarachnoid hemorrhage genetic structures Neural Conduction Synaptic Transmission Evoked Potentials Somatosensory Neural Pathways medicine Humans Aged Diminution Central conduction time business.industry Significant difference Intracranial Aneurysm Clinical grade Somatosensory Cortex Blood flow Middle Aged Subarachnoid Hemorrhage medicine.disease Spinal Cord Cerebral blood flow Somatosensory evoked potential Cerebrovascular Circulation Anesthesia Female sense organs business |
| Zdroj: | Journal of Neurosurgery. 62:25-30 |
| ISSN: | 0022-3085 |
| DOI: | 10.3171/jns.1985.62.1.0025 |
| Popis: | ✓ The relationship between central conduction time (CCT) and hemispheric cerebral blood flow (CBF) has been examined in 20 patients presenting with subarachnoid hemorrhage. A total of 63 combined CCT/CBF recordings were performed at various times throughout the hospital course of these patients, and the findings were correlated to clinical status. The initial-slope index of the CBF (CBFisi) was found to correlate well with clinical grade, and a gradation in flow was noted between the different neurological grades. Patients in Grades I and II (Hunt and Hess classification) had the highest flows (mean CBFisi = 47.2 ± 8.1); Grade III patients had intermediate flows (mean CBFisi = 39.6 ± 7.8); and Grade IV patients had the lowest flows (mean CBFisi = 32.0 ± 6.4). While CCT tended to become increasingly prolonged with worsening grade, a significant difference could not be demonstrated between Grade I, II, and III patients. Only when Grade IV status was reached was the CCT significantly prolonged. When CBFisi and CCT were examined, a threshold relationship was noted between CBFisi and CCT prolongation. At flow values above 30, little change was noted in CCT, and CCT remained in the normal range. However, at flow values below 30, CCT became increasingly prolonged as blood flow diminished. The degree of CCT prolongation appeared to be directly proportional to the degree of blood flow diminution at flows below threshold. |
| Databáze: | OpenAIRE |
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