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公开(公告)号：WO1995016388A1
公开(公告)日：1995-06-22
申请号：PCT/US1994013586
申请日：1994-11-22
Applicant: NELLCOR INCORPORATED
Inventor： NELLCOR INCORPORATED , MERCHANT, Adnan, I. , BERNSTEIN, Michael
IPC: A61B05/00
CPC classification number: A61B5/14551 , A61B5/0017
Abstract: The present invention provides a medical sensor for detecting a blood characteristic. The sensor includes a transducer for producing an analog signal related to the blood characteristic. The analog signal is converted into a transmission signal which is in amplitude-independent form for transmission to a remote analyzer. In one embodiment, a current-to-frequency converter converts a signal from a pulse oximeter sensor into a frequency signal which can be transmitted over a transmission line to a remote pulse oximeter.
Abstract translation: 本发明提供一种用于检测血液特性的医疗传感器。 传感器包括用于产生与血液特性相关的模拟信号的换能器。 模拟信号被转换为与振幅无关的传输信号，用于传输到远程分析仪。 在一个实施例中，电流 - 频率转换器将来自脉搏血氧计传感器的信号转换成可以通过传输线传输到远程脉搏血氧计的频率信号。
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2.发明申请METHOD AND APPARATUS FOR REDUCING AMBIENT NOISE EFFECTS IN ELECTRONIC MONITORING INSTRUMENTS 审中-公开减少电子监控仪器环境噪声影响的方法与装置
公开(公告)号：WO1994009698A1
公开(公告)日：1994-05-11
申请号：PCT/US1993009064
申请日：1993-09-24
Applicant: NELLCOR INCORPORATED
Inventor： NELLCOR INCORPORATED , RICHARDSON, Charles, A. , BERNSTEIN, Michael , OKIKAWA, Jerry, K. , BENNETT, Terrence, R.
IPC: A61B05/00
CPC classification number: A61B5/14551 , A61B5/02416 , A61B5/7203
Abstract: The present invention provides a method and apparatus for adapting to noise sources affecting a pulse oximeter. Various available frequencies are evaluated to determine their respective noise levels and one is selected to act as the operating demultiplexer frequency. During normal operation of the pulse oximeter, the various available demultiplexer frequencies are periodically scanned to determine which has the lowest associated noise. The noise level associated with the operating frequency is used to determine the signal-to-noise ratio of the pulse oximeter signals and thereby qualify certain signals from the pulse oximeter. Those pulses associated with a signal-to-noise ratio below a predetermined threshold are rejected and excluded from use in calculating blood oxygen saturation.
Abstract translation: 本发明提供一种用于适应影响脉搏血氧计的噪声源的方法和装置。 评估各种可用频率以确定它们各自的噪声电平，并且选择一个用作操作解复用器频率。 在脉搏血氧计的正常操作期间，周期性地扫描各种可用的解复用器频率，以确定哪个具有最低的相关噪声。 与操作频率相关联的噪声电平用于确定脉搏血氧仪信号的信噪比，从而限定来自脉搏血氧计的某些信号。 与低于预定阈值的信噪比相关联的那些脉冲被拒绝并排除在计算血氧饱和度时被使用。
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3.发明公开METHOD AND APPARATUS FOR REDUCING AMBIENT NOISE EFFECTS IN ELECTRONIC MONITORING INSTRUMENTS 失效方法和设备，用于电子UEBERWACHUNGSINSTRUMENTEN异径UMGEBUNGSGERAEUSCH。
公开(公告)号：EP0665727A1
公开(公告)日：1995-08-09
申请号：EP93922730.0
申请日：1993-09-24
Applicant: NELLCOR INCORPORATED
IPC: A61B5
CPC classification number: A61B5/14551 , A61B5/02416 , A61B5/7203
Abstract: The present invention provides a method and apparatus for adapting to noise sources affecting a pulse oximeter. Various available frequencies are evaluated to determine their respective noise levels and one is selected to act as the operating demultiplexer frequency. During normal operation of the pulse oximeter, the various available demultiplexer frequencies are periodically scanned to determine which has the lowest associated noise. The noise level associated with the operating frequency is used to determine the signal-to-noise ratio of the pulse oximeter signals and thereby qualify certain signals from the pulse oximeter. Those pulses associated with a signal-to-noise ratio below a predetermined threshold are rejected and excluded from use in calculating blood oxygen saturation.
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4.发明授权METHOD AND APPARATUS FOR REDUCING AMBIENT NOISE EFFECTS IN ELECTRONIC MONITORING INSTRUMENTS 失效用于减少电子监测仪器中的环境噪声的方法和设备
公开(公告)号：EP0665727B1
公开(公告)日：1997-01-29
申请号：EP93922730.2
申请日：1993-09-24
Applicant: NELLCOR INCORPORATED
CPC classification number: A61B5/14551 , A61B5/02416 , A61B5/7203
Abstract: The present invention provides a method and apparatus for adapting to noise sources affecting a pulse oximeter. Various available frequencies are evaluated to determine their respective noise levels and one is selected to act as the operating demultiplexer frequency. During normal operation of the pulse oximeter, the various available demultiplexer frequencies are periodically scanned to determine which has the lowest associated noise. The noise level associated with the operating frequency is used to determine the signal-to-noise ratio of the pulse oximeter signals and thereby qualify certain signals from the pulse oximeter. Those pulses associated with a signal-to-noise ratio below a predetermined threshold are rejected and excluded from use in calculating blood oxygen saturation.
Abstract translation: 本发明提供了用于适应影响脉搏血氧计的噪声源的方法和设备。 评估各种可用频率以确定它们各自的噪声水平，并选择一个作为操作解复用器频率。 在脉搏血氧仪的正常操作期间，周期性地扫描各种可用的解复用器频率以确定哪个具有最低的相关噪声。 使用与工作频率相关的噪声水平来确定脉搏血氧计信号的信噪比，从而限定来自脉搏血氧计的某些信号。 与低于预定阈值的信噪比相关的那些脉冲被拒绝并且不能用于计算血氧饱和度。
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