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    • 4. 发明授权
    • Ultrasonic vascular imaging system and method of blood vessel cannulation
    • 超声血管成像系统及血管插管方法
    • US06755789B2
    • 2004-06-29
    • US10072662
    • 2002-02-05
    • Bradley J. StringerGary A. SimmonsDouglas A. ChristensenShayne MesserlyCameron P. FordRobert W. Evensen
    • Bradley J. StringerGary A. SimmonsDouglas A. ChristensenShayne MesserlyCameron P. FordRobert W. Evensen
    • A61B814
    • A61B8/0841A61B5/489A61B8/06A61B8/0833A61B8/13A61B8/145A61B8/42A61B8/4227A61B8/4455
    • An apparatus, method and system for cannulation of blood vessels. The apparatus comprises a sensor assembly including two linear transducer arrays oriented perpendicularly to each other to form a “T” shape to provide substantially simultaneous ultrasound images of at least one blood vessel in a portion of a patient's body in two perpendicular planes. The apparatus may also include one or more Doppler transducer elements to transmit and receive one or more Doppler beams at an incident angle beneath one of the transducer arrays and in alignment therewith to determine blood flow direction and velocity within the at least one blood vessel. The sensor assembly may be disposed within an elongated, flexible, protective sheath and secured to a graphically marked cover to facilitate orientation of the sensor assembly on the patient and guidance of a needle towards a desired target vessel during the cannulation procedure. The cover may also include associated structure to cooperate with a reference location element to place, align and secure the sensor assembly to the patient's skin at a desired location.
    • 用于插管血管的装置,方法和系统。 该装置包括传感器组件,其包括彼此垂直取向以形成“T”形状的两个线性换能器阵列,以在两个垂直平面中的患者身体的一部分中提供至少一个血管的基本上同时的超声图像。 所述装置还可以包括一个或多个多普勒换能器元件,以在所述换能器阵列中的一个的入射角度下发射和接收一个或多个多普勒波束并与其对准,以确定所述至少一个血管内的血流方向和速度。 传感器组件可以设置在细长的,柔性的保护性护套内并且固定到图形标记的盖子上,以便于在插管过程期间传感器组件在患者身上的取向并且针朝向期望的目标血管的引导。 盖还可以包括相关联的结构,以与参考位置元件配合,以将传感器组件放置,对准并将其固定到患者的皮肤上的所需位置。
    • 9. 发明授权
    • Systems and methods for impedance synthesis
    • 用于阻抗合成的系统和方法
    • US06859051B1
    • 2005-02-22
    • US10452373
    • 2003-06-02
    • Spiro PoulisJohn EvansShayne Messerly
    • Spiro PoulisJohn EvansShayne Messerly
    • H04B1/58G01R27/08H03L5/00H04M1/24
    • H04B1/58
    • The present invention synthesizes a prescribed impedance. The impedance is synthesized by generating a current having a value substantially equal to a voltage divided by a prescribed impedance. Sensing the line voltage and converting that sensed line voltage to its digital equivalent accomplish this first step. The digital line voltage is processed by a factor related to the prescribed impedance to produce an output voltage that has a value substantially equal to the sensed voltage divided by the prescribed impedance. The output voltage controls a voltage to current converter that generates the appropriate current across the points or terminals where the line voltage was measured. Thus, the prescribed impedance is generated across these points or terminals because the line voltage divided by the generated current is substantially equal to the prescribed impedance.
    • 本发明合成规定的阻抗。 通过产生具有基本上等于被规定阻抗除以的电压的值的电流来合成阻抗。 感测线路电压并将感测到的线路电压转换为其数字等效电压完成了第一步。 数字线路电压由与规定阻抗相关的因子处理,以产生具有基本上等于感测电压除以规定阻抗的值的输出电压。 输出电压控制电压到电流转换器,其在测量线路电压的点或端子处产生适当的电流。 因此,由于产生的电流除以的线电压基本上等于规定的阻抗,所以在这些点或端子之间产生规定的阻抗。
    • 10. 发明授权
    • Transfer function implementation using digital impedance synthesis
    • 使用数字阻抗合成的传递函数实现
    • US06338077B1
    • 2002-01-08
    • US09321899
    • 1999-05-28
    • Spiro PoulisJohn EvansShayne Messerly
    • Spiro PoulisJohn EvansShayne Messerly
    • G06J100
    • H03H17/02
    • A system and circuit is provided for digitally synthesizing the impedance of a transfer function. The impedance of the transfer function is digitally synthesized by generating a current that, when combined with an input voltage, results in the impedance of the transfer function. This is accomplished by sensing the input signal and processing it with a generator or multiplier such that a voltage is produced. The produced voltage controls a current source and creates a current having a value equal to the inverse of the transfer function impedance. The sensed or input voltage divided by the generated current is equal to the impedance of the transfer function. In this manner, many different transfer functions can be digitally synthesized without having to design an alternate circuit.
    • 提供了一种用于数字合成传递函数的阻抗的系统和电路。 传递函数的阻抗通过产生与输入电压组合导致传递函数的阻抗的电流数字合成。 这通过感测输入信号并用发生器或乘法器来处理,从而产生电压来实现。 产生的电压控制电流源并产生具有等于传递函数阻抗的倒数的值的电流。 感测或输入电压除以发电电流等于传递函数的阻抗。 以这种方式,可以数字地合成许多不同的传递函数,而不必设计备用电路。