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    • 7. 发明授权
    • Method of isolating surface tension and yield stress in viscosity measurements
    • 在粘度测量中分离表面张力和屈服应力的方法
    • US06450974B1
    • 2002-09-17
    • US09708137
    • 2000-11-08
    • Sangho KimSehyun ShinYoung I. Cho
    • Sangho KimSehyun ShinYoung I. Cho
    • A61B500
    • G01N11/06A61B5/02035G01N11/04G01N2013/0283
    • A method for isolating the effects of surface tension and/or yield stress of a fluid that is flowing in a U-shaped tube wherein one or both legs of the U-shaped tube is monitored over time for the changing height of the respective fluid columns therein. A portion of the U-shaped tube comprises a flow restrictor, e.g., a capillary tube, of known dimensions. Monitoring one or both of the moving fluid columns over time permits the determination of the viscosity of the fluid flowing therein over a range of shear rates from the difference in fluid column heights. However, it is necessary to isolate the effects of surface tension and/or yield stress to obtain an accurate viscosity determination. The method provides one manner in which the surface tension effect can be subtracted from the difference in fluid column heights and then any yield stress effect can then be determined. Alternatively, the method also provides a process by which both the surface tension effect and yield stress effect can be determined simultaneously.
    • 用于分离在U形管中流动的流体的表面张力和/或屈服应力的影响的方法,其中U形管的一个或两个腿随着时间的推移监测各个流体柱的变化高度 其中。 U形管的一部分包括具有已知尺寸的限流器,例如毛细管。 随着时间的推移监测一个或两个运动流体柱可以在流体柱高度的差异的剪切速率范围内确定流过其中的流体的粘度。 然而,有必要分离表面张力和/或屈服应力的影响,以获得准确的粘度测定。 该方法提供了一种方式,其中可以从流体柱高度的差中减去表面张力效应,然后可以确定任何屈服应力效应。 或者,该方法还提供了同时确定表面张力效应和屈服应力效应两者的过程。
    • 8. 发明授权
    • Dual riser/single capillary viscometer
    • 双提升管/单毛细管粘度计
    • US06322524B1
    • 2001-11-27
    • US09439795
    • 1999-11-12
    • Kenneth KenseyWilliam N. HogenauerSangho Kim
    • Kenneth KenseyWilliam N. HogenauerSangho Kim
    • A61B500
    • A61B5/6866A61B5/02035A61B5/15003A61B5/150992A61B5/155G01N11/04G01N11/06
    • A blood viscosity measuring system and methods for measuring blood viscosity system monitors the change in height of two, oppositely-moving, columns of blood from the circulating blood of a patient and, given the dimensions of a capillary tube through which the blood flows, determines the blood viscosity over a range of shears, especially low shears. The system includes a tube set (disposable or nonisposable) that includes a pair of riser tubes, a capillary tube of predetermined dimensions that is coupled between the riser tubes (or that forms a portion of one riser tube) and a valve mechanism for controlling the circulating flow of blood from the patient into the riser tubes. Respective sensors monitor the movement of the columns of blood in each of the riser tubes and an associated microprocessor analyzes these movements, along with the predetermined dimensions of the capillary tube to determine the viscosity of the patient's circulating blood.
    • 一种血液粘度测量系统和用于测量血液粘度系统的方法监测来自患者的循环血液的两个相对运动的血液柱的高度变化,并且考虑到血液流过的毛细管的尺寸,确定 剪切范围内的血液粘度,特别是低剪切。 该系统包括管组(一次性或非一次性),其包括一对提升管,预定尺寸的毛细管连接在提升管之间(或形成一个提升管的一部分)和用于控制 将血液从患者循环到提升管中。 相应的传感器监测每个提升管中的血液柱的运动,并且相关微处理器分析这些运动以及毛细管的预定尺寸以确定患者循环血液的粘度。