The effects of temperature on blood flow ultrasonic echogenicity in vitro
| Autor: | Bernard Sigel, J Machi, Jeffrey R. Justin, Beitler Jc |
|---|---|
| Rok vydání: | 1983 |
| Předmět: |
Adult
Erythrocyte Aggregation Radiological and Ultrasound Technology Red Cell business.industry Temperature Echogenicity Blood flow In Vitro Techniques Erythrocyte aggregation In vitro Nuclear magnetic resonance Blood Circulation Time Blood Circulation Medicine Humans Radiology Nuclear Medicine and imaging Ultrasonic sensor Ultrasonography business Blood Flow Velocity |
| Zdroj: | Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine. 2(12) |
| ISSN: | 0278-4297 |
| Popis: | An explanation of the mechanism of ultrasonic echogenicity in flowing blood is proposed based upon an in vitro study that indicates a causal relation between red cell aggregation and these echoes. Echogenicity was measured in vitro at 37 degrees, 24 degrees, and 0 degree C as blood flow shear rates were varied. Echogenicity increased at higher temperatures and lower shear rates. The directions of changes in blood echogenicity exactly paralleled previously known changes in red cell aggregation resulting from changes in temperature. The authors consider this to be further evidence that red cell aggregation is an important cause of low-intensity echoes observed in clinical ultrasonography of the heart and circulation. |
| Databáze: | OpenAIRE |
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