结论单向频谱峰值流速不一定降低。
Conclusions the flow of peak value of the unidirectional waveform is not always decreased.
SCA第二段受压，患侧上肢动脉在肩关节过度外展时峰值流速明显减慢。
The peak velocity of the same side arm artery decreased significantly when excessive abduction of the shoulder joint resulted in SCA second part compressed.
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).
超声观察肝外胆管内径、管壁厚度、管腔内透声、肝动脉峰值流速(PS V)、阻力指数(RI)。
Focus on extrahepatic bile duct diameter, wall thickness, lumen transparent sound, hepatic artery peak flow velocity (PSV) and resistance index (RI).
结论：肾缺如、肾异位、肾游走患者肾动脉血流峰值流速的改变，为肾缺如、肾异位、肾游走的鉴别诊断提供了新的依据。
Conclusions: It present a new way to differentiate unilateral renal ectopy and nephrospasis by measuring the changes of mean peak-systolic flow velocity of renal artery in these patients.
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).
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.
高血压病各组与健康对照组比较，舒张早期与舒张晚期峰值流速的比值（E/A），以及舒张早期流速的减速度（EDC）差异有显著性意义；
The peak flow rate ratio(E/A)in early and late of diastolic phase and the flow rate deceleration in early diastolic phase(EDC)also showed significant differences.
对确定脉体有价值的指标是寸口脉管壁的厚度、管腔内径、管腔面积和血流量的大小以及寸口脉血流柱的长度、峰值流速血流、加速度和减速时间。
The thickness of blood vessels, inside diameter, area, flow, the length of color flow column, maximum velocity, acceleration and deceleration time were of good value on pulse tension.
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).
结果发现在冲击面附近的射流横截面上，伴随着两个反向旋转涡对的出现，形成了主流速度的两个偏心峰值。
It has been found that at the jet flow cross-section near the impingement surface accompanied by the appearance of two counter-rotating vortex pairs there emerge two eccentric peak values.
煤样的峰值渗流速度随围压的增加而减小，呈现较明显的线性关系。
The seepage velocity in peak stress decreases with the increase of confining pressure, and indicates obvious linear relationship.
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.
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).
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).
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).
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