# Characterization of Blood Properties from Coagulating Blood of Different Hematocrits Using Ultrasonic Backscatter and Attenuation

## 抄録

The influence of hematocrit on the change of blood properties during coagulating was extensively investigated using ultrasonic integrated backscatter and attenuation. Measurements were performed with porcine blood at hematocrits ranging from 25 to 55% using a 10 MHz transducer. Results showed that both integrated backscatter and attenuation are able to sensitively differentiate various stages of blood properties during coagulating. The slopes of integrated backscatter ($S_{\text{r}}$, dB/S) and attenuation ($\alpha_{\text{r}}$, dB$\cdot$cm-1$\cdot$MHz-1$\cdot$mS-1) are increased relative to hematocrit. The best fits for $S_{\text{r}}$ and $\alpha_{\text{r}}$ as a function of hematocrit ($H$) equal to $S_{\text{r}}=0.0357+1.62e^{-0.108H}$ and $\alpha_{\text{r}}=0.0281+0.003H$, respectively. Variations of clotting time ($T_{\text{s}}$) and reaction time ($T_{\alpha}$), estimated respectively from ultrasonic integrated backscatter and attenuation, associated with clot formation are also increased with hematocrit. This study demonstrates that blood hematocrit is a substantial factor affecting viscosity and backscattering properties of blood during coagulation capable of being discerned by ultrasonic backscattering and attenuation.

## 収録刊行物

• Japanese journal of applied physics. Pt. 1, Regular papers & short notes

Japanese journal of applied physics. Pt. 1, Regular papers & short notes 45(9A), 7191-7196, 2006-09-15

Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physics

## 各種コード

• NII論文ID(NAID)
10018246764
• NII書誌ID(NCID)
AA10457675
• 本文言語コード
EN
• 資料種別
ART
• 雑誌種別
大学紀要
• ISSN
0021-4922
• NDL 記事登録ID
8056994
• NDL 雑誌分類
ZM35(科学技術--物理学)
• NDL 請求記号
Z53-A375
• データ提供元
CJP書誌  NDL  JSAP

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