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Titolo:
BLOOD VELOCITY PROFILES IN THE HUMAN RENAL-ARTERY BY DOPPLER ULTRASOUND AND THEIR RELATIONSHIP TO ATHEROSCLEROSIS
Autore:
YAMAMOTO T; OGASAWARA Y; KIMURA A; TANAKA H; HIRAMATSU O; TSUJIOKA K; LEVER MJ; PARKER KH; JONES CJH; CARO CG; KAJIYA F;
Indirizzi:
KAWASAKI MED UNIV,DEPT MED ENGN,577 MATSUSHIMA KURASHIKI OKAYAMA 70101 JAPAN KAWASAKI MED UNIV,DEPT SYST CARDIOL KURASHIKI OKAYAMA 70101 JAPAN KAWASAKI MED UNIV,DEPT UROL KURASHIKI OKAYAMA 70101 JAPAN UNIV LONDON IMPERIAL COLL SCI & TECHNOL,CTR BIOL & MED SYST LONDON SW7 2AZ ENGLAND PRINCE WALES HOSP BRIDGEND ENGLAND
Titolo Testata:
Arteriosclerosis, thrombosis, and vascular biology
fascicolo: 1, volume: 16, anno: 1996,
pagine: 172 - 177
SICI:
1079-5642(1996)16:1<172:BVPITH>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
WALL SHEAR-STRESS; CORONARY-ARTERY; FLOW; LOCALIZATION; MODEL; PATHOGENESIS;
Keywords:
ATHEROGENESIS; AORTORENAL BIFURCATION; LOW TIME-AVERAGED SHEAR RATE; FLOW SEPARATION; FLOW OSCILLATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
23
Recensione:
Indirizzi per estratti:
Citazione:
T. Yamamoto et al., "BLOOD VELOCITY PROFILES IN THE HUMAN RENAL-ARTERY BY DOPPLER ULTRASOUND AND THEIR RELATIONSHIP TO ATHEROSCLEROSIS", Arteriosclerosis, thrombosis, and vascular biology, 16(1), 1996, pp. 172-177

Abstract

Blood velocity profiles were measured in the renal branch (diameter 5.9 +/- 1.3 mm) of the aortorenal bifurcation using a 20-MHz 80-channelpulsed Doppler velocimeter during retroperitoneal surgery in 10 patients. The peak Reynolds number was 1145 +/- 140 and the frequency parameter (Wormersley parameter) was 3.0 +/- 0.8. immediately distal to theostium of the renal artery, reverse Bow, indicating flow separation, was observed near the cranial wall mainly during the first part of thecardiac cycle. There were flows from the cranial to the caudal side of the artery at this location, indicating the presence of strong secondary flows. Two diameters down stream of the ostium, the velocity profiles were skewed to the caudal side in all patients. Four diameters downstream, the flow profile was symmetrical (3 patients) or only slightly skewed (7 patients) and virtually parabolic throughout the cardiac cycle. These observations mean that the flow on the cranial side df the renal branch of the human aortorenal bifurcation is characterized by(1) a bidirectional oscillation of the Bow, (2) separation of the Bowduring systole, and (3) low time-averaged shear rate. These blood velocity patterns may be related to the localization and development of atheromatous plaque that occurs preferentially in this region of the renal artery. Conversely, the unidirectional, axisymmetrical how found in more distal parts of the renal artery are associated with a very lowincidence of lesions.

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Documento generato il 04/12/20 alle ore 21:45:52