Transcranial Doppler measurement before and after carotid endarterectomy
Carotid endarterectomy not only removes a source of emboli but significantly increases flow up the internal carotid artery (ICA). ICA flow and middle cerebral artery velocity (Vmca) measurements were made before, during and after endarterectomy in 40 consecutive patients. Mean ICA flow increased from 207 ml/min (95% confidence interval (CI) 136-259) to 388 ml/min (95% CI 348-428) (P < 0.001, Mann-Whitney U test) following endarterectomy. Despite this, Vmca did not rise significantly at the end of the procedure. By the first postoperative day Vmca rose to 55.3 cm/s (95% CI 47.6-62.4) (P < 0.025, ANOVA) only to fall preoperative values (46.0 cm/s (95% CI 40.0-52.1)) by 6 weeks. These results suggest that cerebral autoregulation takes time to adapt to the increased flow and pressure following endarterectomy, but has stabilized by 6 weeks.
| Medienart: |
Artikel |
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| Erscheinungsjahr: |
1992 |
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| Erschienen: |
1992 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:37 |
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| Enthalten in: |
Journal of the Royal College of Surgeons of Edinburgh - 37(1992), 5 vom: 08. Okt., Seite 311-2 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Magee, T R [VerfasserIn] |
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| Themen: |
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| Anmerkungen: |
Date Completed 05.02.1993 Date Revised 23.11.2016 published: Print Citation Status MEDLINE |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM012629502 |
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| 245 | 1 | 0 | |a Transcranial Doppler measurement before and after carotid endarterectomy |
| 264 | 1 | |c 1992 | |
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| 500 | |a Date Completed 05.02.1993 | ||
| 500 | |a Date Revised 23.11.2016 | ||
| 500 | |a published: Print | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a Carotid endarterectomy not only removes a source of emboli but significantly increases flow up the internal carotid artery (ICA). ICA flow and middle cerebral artery velocity (Vmca) measurements were made before, during and after endarterectomy in 40 consecutive patients. Mean ICA flow increased from 207 ml/min (95% confidence interval (CI) 136-259) to 388 ml/min (95% CI 348-428) (P < 0.001, Mann-Whitney U test) following endarterectomy. Despite this, Vmca did not rise significantly at the end of the procedure. By the first postoperative day Vmca rose to 55.3 cm/s (95% CI 47.6-62.4) (P < 0.025, ANOVA) only to fall preoperative values (46.0 cm/s (95% CI 40.0-52.1)) by 6 weeks. These results suggest that cerebral autoregulation takes time to adapt to the increased flow and pressure following endarterectomy, but has stabilized by 6 weeks | ||
| 650 | 4 | |a Journal Article | |
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| 700 | 1 | |a Baird, R N |e verfasserin |4 aut | |
| 700 | 1 | |a Horrocks, M |e verfasserin |4 aut | |
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