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1. 发明授权

US4892101A Method and apparatus for offsetting baseline portion of oximeter signal 失效
标题翻译：用于抵消血氧计信号基线部分的方法和装置
公开(公告)号：US4892101A
公开(公告)日：1990-01-09
申请号：US315330
申请日：1989-02-24
申请人： Peter W. Cheung , Karl F. Gauglitz , Lee R. Mason , Stephen J. Prosser , Robert E. Smith , Darrell O. Wagner , Scott W. Hunsaker
发明人： Peter W. Cheung , Karl F. Gauglitz , Lee R. Mason , Stephen J. Prosser , Robert E. Smith , Darrell O. Wagner , Scott W. Hunsaker
IPC分类号： A61B5/00
CPC分类号： A61B5/14551
摘要： A feedback control system is disclosed for use in processing signals employed in pulse transmittance oximetry. The signals are produced in response to light transmitted through, for example, a finger at two different wavelengths. Each signal includes a slowly varying baseline component representing the relatively fixed attenuation of light produced by bone, tissue, skin, and hair. The signals also include pulsatile components representing the attenuation produced by the changing blood volume and oxygen saturation within the finger. The signals are processed by the feedback control system before being converted by an analog-to-digital (A/D) converter (72) for subsequent analysis by a microcomputer (16). The feedback control system includes a controllable offset subtractor (66), a programmable gain amplifier (68), controllable drivers (44) for the light sources (40, 42), and the microcomputer (16). The microcomputer (16) receives signals from the offset subtractor (66), gain amplifier (68), drivers (44) and A/D converter (72) to produce signals that control the function of the subtractor (66) and drivers (44) in the following manner. Normally, the drivers ( 44) are maintained within a predetermined current range. In the event the microcomputer (16) senses an output from the converter (72) that is not within a predetermined range, the drive signal is adjusted to produce an acceptable signal. The magnitude of the offset removed by the subtractor (66), as controlled by the microcomputer (16), is maintained at a constant level when the converter (72) output is within a first predetermined range and is a predetermined function of the converter (72) output when that output falls within a second predetermined range.
摘要翻译：公开了一种反馈控制系统，用于处理脉冲透射比率测定中使用的信号。信号是响应于透过例如两个不同波长的手指的光产生的。每个信号包括缓慢变化的基线分量，其表示由骨，组织，皮肤和头发产生的光的相对固定的衰减。信号还包括表示由手指内的血液体积变化和氧饱和度产生的衰减的脉动成分。这些信号由模拟数字（A / D）转换器（72）转换之前由反馈控制系统处理，用于微计算机（16）的后续分析。反馈控制系统包括可控偏移减法器（66），可编程增益放大器（68），用于光源（40,42）的可控驱动器（44）和微计算机（16）。微型计算机（16）从偏移减法器（66），增益放大器（68），驱动器（44）和A / D转换器（72）接收信号，以产生控制减法器（66）和驱动器（44）的功能的信号）。通常，驱动器（44）保持在预定的电流范围内。在微计算机（16）感测到转换器（72）的输出不在预定范围内的情况下，调节驱动信号以产生可接受的信号。当转换器（72）输出在第一预定范围内并且是转换器的预定功能时，被微计算机（16）控制的减法器（66）去除的偏移量的幅度保持在恒定水平 72）当该输出处于第二预定范围内时输出。

2. 发明授权

US4819646A Feedback-controlled method and apparatus for processing signals used in oximetry 失效
标题翻译：用于处理血氧饱和度信号的反馈控制方法和装置
公开(公告)号：US4819646A
公开(公告)日：1989-04-11
申请号：US897664
申请日：1986-08-18
申请人： Peter W. Cheung , Karl F. Gauglitz , Lee R. Mason , Stephen J. Prosser , Robert E. Smith , Darrell O. Wagner , Scott W. Hunsaker
发明人： Peter W. Cheung , Karl F. Gauglitz , Lee R. Mason , Stephen J. Prosser , Robert E. Smith , Darrell O. Wagner , Scott W. Hunsaker
IPC分类号： A61B5/145 , A61B5/00 , A61B5/1455 , A61B6/00
CPC分类号： A61B5/14551
摘要： A feedback control system is disclosed for use in processing signals employed in pulse transmittance oximetry. The signals are produced in response to light transmitted through, for example, a finger at two different wavelengths. Each signal includes a slowly varying baseline component representing the relatively fixed attenuation of light produced by bone, tissue, skin, and hair. The signals also include pulsatile components representing the attenuation produced by the changing blood volume and oxygen saturation within the finger. The signals are processed by the feedback control system before being converted by an analog-to-digital (A/D) converter (72) for subsequent analysis by a microcomputer (16). The feedback control system includes a controllable offset subtractor (66), a programmable gain amplifier (68), controllable drivers (44) for the light sources (40,42), and the microcomputer (16). The microcomputer receives signals from the offset subtractor (66), gain amplifier (68), drivers (44) and A/D converter (72) to produce signals that control the function of the subtractor (66) and drivers (44) in the following manner. Normally, the drivers (44) are maintained within a predetermined current range. In the event the microcomputer (16) senses an output from the converter (72) that is not within a predetermined range, the drive signal is adjusted to produce an acceptable signal. The magnitude of the offset removed by the subtractor (66), as controlled by the microcomputer (16), is maintained at a constant level when the converter (72) output is within a first predetermined range and is a predetermined function of the converter (72) output when that output falls within a second predetermined range.

3. 发明授权

US5259381A Apparatus for the automatic calibration of signals employed in oximetry 失效
标题翻译：用于自动校准血氧饱和度信号的装置
公开(公告)号：US5259381A
公开(公告)日：1993-11-09
申请号：US377722
申请日：1989-07-10
申请人： Peter W. Cheung , Karl F. Gauglitz , Scott W. Hunsaker , Stephen J. Prosser , Darrell O. Wagner , Robert E. Smith
发明人： Peter W. Cheung , Karl F. Gauglitz , Scott W. Hunsaker , Stephen J. Prosser , Darrell O. Wagner , Robert E. Smith
IPC分类号： A61B5/00 , A61B5/024 , G01N21/27
CPC分类号： G01N21/274 , A61B5/02427 , A61B5/14552 , A61B5/1495 , A61B2560/0252 , A61B2562/08
摘要： Under the present invention, a method and apparatus are provided for compensating for the effect temperature variations have on the wavelength of light emitted by the oximeter sensor light source (40, 42). In pulse oximetry, LEDs (40, 42) are typically employed to expose tissue to light at two different wavelengths. The light illuminating the tissue is received by a detector (38) where signals proportional to the intensity of light are produced. These signals are then processed by the oximeter circuitry to produce an indication of oxygen saturation. Because current oximetry techniques are dependent upon the wavelengths of light emitted by the LEDs (40, 42), the wavelengths must be known. Even when predetermined combinations of LEDs (40, 42) having relatively precise wavelengths are employed, variations in the wavelength of light emitted may result. Because the sensor (12) may be exposed to a significant range of temperatures while in use, the effect of temperature on the wavelengths may be significant. To compensate for this effect, a temperature sensor (50) is included in the sensor (12) to produce a signal indicative of sensor temperature. This signal is interpreted by the oximeter circuitry including, for example, a microcomputer (16), where the effect of temperature on wavelength is compensated for. In a preferred arrangement, this compensation takes the form of a computation of an alternative calibration curve from which the oxygen saturation is indicated, given a particular processing of signals from the detector (38).
摘要翻译：在本发明中，提供了一种方法和装置，用于补偿由血氧计传感器光源（40,42）发射的光的波长对温度变化的影响。在脉搏血氧测定中，通常使用LED（40,42）来将组织暴露于两个不同波长的光。照射组织的光被检测器（38）接收，其中产生与光强度成比例的信号。然后，这些信号由血氧计电路处理以产生氧饱和度的指示。因为目前的血氧测定技术取决于由LED（40,42）发射的光的波长，所以波长必须是已知的。即使当使用具有相对精确波长的LED（40,42）的预定组合时，也可能导致发射的光的波长的变化。因为传感器（12）可能在使用时暴露于显着的温度范围内，所以温度对波长的影响可能是显着的。为了补偿这种效果，传感器（12）中包括温度传感器（50），以产生指示传感器温度的信号。该信号由包括例如温度对波长的影响得到补偿的微计算机（16）的血氧计电路解释。在优选的布置中，给定来自检测器（38）的信号的特定处理，该补偿采用计算替代校准曲线的形式，从该氧化饱和度被指示。

4. 发明授权

US4913150A Method and apparatus for the automatic calibration of signals employed in oximetry 失效
标题翻译：用于自动校准血氧饱和度信号的方法和装置
公开(公告)号：US4913150A
公开(公告)日：1990-04-03
申请号：US897663
申请日：1986-08-18
申请人： Peter W. Cheung , Karl F. Gauglitz , Scott W. Hunsaker , Stephen J. Prosser , Darrell O. Wagner , Robert E. Smith
发明人： Peter W. Cheung , Karl F. Gauglitz , Scott W. Hunsaker , Stephen J. Prosser , Darrell O. Wagner , Robert E. Smith
IPC分类号： G01N21/31 , A61B5/00 , A61B5/024 , A61B5/145 , A61B5/1455 , G01N21/27
CPC分类号： A61B5/02427 , A61B5/14552 , A61B5/1495 , G01N21/274 , A61B2560/0252 , A61B2562/08
摘要： Under the present invention, a method and apparatus are provided for compensating for the effect temperature variations have on the wavelength of light emitted by the oximeter sensor light sources (40, 42). In pulse oximetry, LEDs are typically employed to expose tissue to light at two different wavelengths. The light illuminating the tissue is received by a detector (38) where signals proportional to the intensity of light are produced. These signals are then processed by the oximeter circuitry to produce an indication of oxygen saturation. Because current oximetry techniques are dependent upon the wavelengths of light emitted by the LEDs (40-42), the wavelengths must be known. Even when predetermined combinations of LEDs (40-42) having relatively precise wavelengths are employed, variations in the wavelength of light emitted may result. Because the sensor (12) may be exposed to a significant range of temperatures while in use, the effect of temperature on the wavelengths may be significant. To compensate for this effect, a temperature sensor (50) is included in the sensor (12) to produce a signal indicative of sensor temperature. This signal is interpreted by the oximeter circuitry including, for example, a microcomputer (16), where the effect of temperature on wavelength is compensated for. In a preferred arrangement, this compensation takes the form of a computation of an alternative calibration curve from which the oxygen saturation is indicated, given a particular processing of signals from the detector (38).

5. 发明授权

US5564108A Non-invasive software update apparatus 失效
标题翻译：非侵入式软件更新装置
公开(公告)号：US5564108A
公开(公告)日：1996-10-08
申请号：US439718
申请日：1995-05-12
申请人： Scott W. Hunsaker , Stephan Kulik, III , Alan D. Martin , Craig A. Totel
发明人： Scott W. Hunsaker , Stephan Kulik, III , Alan D. Martin , Craig A. Totel
IPC分类号： A61B5/145 , A61B5/00 , A61B5/1455 , G06F3/00 , G06F9/06 , G06F9/24 , G06F9/445 , G06F11/00 , G06F11/30 , G06F13/00
CPC分类号： A61B5/14551 , G06F8/65 , G06F9/24 , A61B2562/08
摘要： This apparatus makes use of the existing data collection probe connector on the instrumentation as the port through which the software updates are loaded into the programmable memory devices that are used to store the operational software of the instrumentation. Circuitry is provided in the instrumentation to automatically differentiate between software update data being loaded into the instrumentation and the normal monitoring data that is received from the probe. This is accomplished by the use of probe defining circuitry that is able to differentiate between the standard probe used for data collection purposes and the software update probe that is provided to download software into the programmable memory devices.
摘要翻译：该装置利用仪器上的现有数据采集探头连接器作为将软件更新加载到可用于存储仪器操作软件的可编程存储器件中的端口。仪器中提供电路，以自动区分装入仪器的软件更新数据和从探头接收到的正常监控数据。这是通过使用能够区分用于数据收集目的的标准探针的探针定义电路和用于将软件下载到可编程存储器件中的软件更新探针来实现的。

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