检测肿瘤内部的血流频谱，记录收缩期峰值流速(PSV)和阻力指数(RI)。
Detection of tumor blood flow within the spectrum, recorded peak systolic velocity (PSV) and resistance index (RI).
结果表明观察组脑底动脉收缩期峰值血流速度明显高于正常对照组，差异非常显著（P＜0．01）；
The result showed that systolic peak velocity of bottom cerebral arteries in heroin addicts was much higher than that of the normal control group (P<0.01).
通过对椎动脉收缩期切迹组与无切迹组做束臂试验，比较束臂前后收缩期血流速度下降幅度及流速自下降至恢复的时间。
Compare the decline in blood flow velocities and its recovery time before and after Trousseau's test in vertebral waveform with or without notch at systole.
方法：应用经颅多普勒超声（TCD）检查了发作期偏头痛患者声信息治疗前后颅内各动脉的平均血流速度。
Methods With transcranial doppler ultrasound(TCD), intracranial arteries of patients with migraine during the period of attack were examined before and after sound information therapy.
结果：患眼的视网膜中央动脉收缩期峰值血流速度、平均血流速度均低于对侧眼（P＜0．0001）。
Results:The peak systolic velocity and the time average velocity of the central retinal artery of the affected eyes were lower than those of the patients healthy eyes(P<0 0001).
病变对侧va呈收缩期血流速度增快的高阻力频谱。
High resistance waveform with increased flow velocity was seen in contralateral VA.
病灶局部所测血流动力学参数为收缩期峰值血流速度PS V，舒张末期血流速度(EDV)及阻力指数ri。
The hemodynamic parameters measured in the lesion locations included peak systolic velocity (PSV), end diastolic velocity (EDV), and resistance index (RI).
超声分别以肱动脉段收缩期峰值流速值（PSV）、收缩期加速度值（AC）、肱动脉段流速曲线形态异常为标准预测上肢动脉近端病变。
The stenosis in proximal upper extremity was predicted by values of peak systolic velocity (PSV), systolic acceleration (AC), and the abnormal waveforms from brachial artery.
目的评价肝素对改善妊娠中晚期脐动脉收缩期最大血流速度（S）与舒张末期血流速度（D）的比值异常的临床效果。
ObjectiveTo evaluate the efficiency of heparin on the ratio of peak systolic to least diastolic flow velocity (S/D) of umbilical artery flow velocity waveforms at second-trimester pregnancies.
结果表明，在引水期水库的流场达到稳定状态时，水库流场有一个自东向西的水流主要通道。还对水库出口处有初始水体流速的情况进行了模拟。
The simulated results indicate that when the stream field begins steady, there is a steady main flow channel from the east part of the lake to the west part.
结果经颅多普勒检测颈动脉轻度狭窄平均流速的敏感性为88.3%，收缩期峰流速的敏感性为92 . 6 %，特异性为97.3%。
Results Transcranial Doppler had sensitivity of 88.3% (mean flow velocity) and 92.6% (systolic peak flow velocity) with specificity of 97.3% to detect the mild stenosis of carotid artery.
目的探讨脐动脉收缩期血流峰值（S）与舒张末期血流速度（D）的比值（S/D）对预测胎儿宫内缺氧的临床价值。
Objective This paper is to investigate the ratio of the systolic peak value and the end-diastolic velocity of blood flow (S/D value) and its clinical value, which can predict fetal anoxia.
结果：咀嚼5分钟和10分钟后的收缩期峰流速、舒张期末峰流速及平均峰流速均高于咀嚼前，有显著性差异（P<0.05）。
Result: The mean glow velocity, velocity of flow during systole and diastole was shown to increase significantly 5, 10 minutes after mastication (P< 0.05).
第二组处于收缩期正常流速，舒张末期低流速，肾血管高阻状态。
In the second phase group it was in a state of normal systolic flow velocity, low diastolic flow velocity and high renal vascular resistance.
应用经食管超声心动图测量肺静脉血流频谱曲线收缩早期逆向R波峰值流速（PVR）和收缩期S波峰值流速（PVS） ，分析PVR和PVS与其前心电图R R间期的关系。
The peak velocities of the early systolic reversal wave (PVR) and the systolic forward wave (PVS) were measured. The relationships between the preceding R-R intervals and PVR, PVS were analyzed.
结果典型偏头痛发作期，多患者脑动脉血流速度明显升高，小部分患者表现为脑血流速度降低。
Results On the period of the migraine outbreaks, the velocity of blood flow of the brain artery heightens evidently to the majority of patients, whereas it lowers to the minority of patients.
随着三峡库区二期蓄水成功，库区的水环境由过去典型的河流水体转变为类似湖泊的水体，流速减缓，自净能力降低。
With success of second-phase water storage project for the Three Gorges Reservoir, water environment of the reservoir area has changed from typical river water to a kind of water body like lake.
MES阳性率与狭窄程度、斑块超声回声、狭窄处收缩期血流速度及卒中危险因素未见关联。
No correlation was found between MES with degree of stenosis, and ultrasonic characteristics of plaques, and PSV (peak systolic velocity), and stroke risk factors.
颅内动脉狭窄按照TCD收缩期血流速度判断分成四组：正常组、轻度狭窄组、中度狭窄组、重度狭窄组。
Intracranial arterial stenosis according to TCD peak systolic flow velocity divided into four groups: normal, mild stenosis, moderate stenosis, severe stenosis.
收缩期峰值流速餐前和餐后各时点比较差异有统计学意义（P<0.01），餐后各时点比较差异无统计学意义（P>0.05）；
Significant difference was found between fasting PSV value and postprandial values(P<0.01), but no difference was found among values at various postprandial time points(P>0.05).
收缩期峰值流速餐前和餐后各时点比较差异有统计学意义（P<0.01），餐后各时点比较差异无统计学意义（P>0.05）；
Significant difference was found between fasting PSV value and postprandial values(P<0.01), but no difference was found among values at various postprandial time points(P>0.05).
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