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|本期目录/Table of Contents|

不同多普勒取样容积对血流速度测量的影响(PDF)

《心脏杂志》[ISSN:1009-7236/CN:61-1268/R]

期数:
1997年第4期
页码:
218-220
栏目:
论著
出版日期:
1997-08-01

文章信息/Info

Title:
The influence of different Doppler sample volume on the measurement of blood flow velocity
作者:
段云友　曹铁生　宾建平　贺　声
第四军医大学唐都医院超声诊断科　西安710038
Author(s):
Duan Yunyou;  Cao Tiesheng ;  Bin Jianping ;  He Sheng
Department of Ultrasonic Diagnostics, Tangdu Hospital , Fourth Military Medical University, Xi′an 710038
关键词:
超声心动描记术;  多普勒　取样容积　血流速度测量
Keywords:
echocardiography;  Doppler　　sample volume　　blood flow velocity measurement
分类号:
-
DOI:
-
文献标识码:
-
摘要:
为探讨脉冲波多普勒不同取样容积(SV) 对最大血流速度(Vmax) 测量的影响, 我们用内径5.0 mm 模拟血管和肝素化人全血, 分别以不同血泵流率和SV为1.5 mm , 5.0 mm 及10.0mm , 在仪器其它条件不变的情况下, 进行体外模拟脉动血流速度频谱实验。当流率为200 ml/min 至500 ml/min 时, SV为1.5 mm与SV为5.0 mm 和10.0mm 所测多普勒频谱的Vmax值间差异显著(P< 0.01) , 而SV为5.0mm 与SV为10.0 mmr测值间差异不显著(P>0.05)。提示在临床工作中, 根据所测血管内径, 尽可能增大SV长度,以减少通过时间效应所致频谱增宽, 更能准确获得血流速度信息。
Abstract:
To observe the influence of Doppler sample volume(SV)on the measurement of the peak b lood flow velocity(Vmax) , we used a blood pump with controllable pulsatile flow rate, mimic blood vessel of 5.0mm in diameter and heparinized human full blood to perform the simulation in vitro experiment.The SVs of 1.5mm , 5.0mm and 10.0mm were selected for the experiment.When the blood flow rate was between 200 and 500 ml/min and the instrument controls were at the same condition, there w as a significant difference between Vmax of SV 1.5mm and Vmax of SV 5.0 and 10.0mm (P<0.01) but there was no significant difference between Vmax of SV 5.0 and 10.0mm (P>0.05).The experiment indicated that to obtain accurate flow velocity measurement and decrease the influence of transit t ime effect in practice one should increase the SV to cover the blood vessel.

参考文献/References

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［8］段云友, 宾建平, 贺　声, 等.脉冲多普勒外周血管血流定量体外模拟实验研究.中医医学影像技术, 1994; 10: 128.

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备注/Memo

备注/Memo:
Received 1996-12-27；revised 1997-03-20
更新日期/Last Update: 1997-08-01