Method and apparatus for measuring internal body temperature utilizing infrared emissions
    22.
    发明公开
    Method and apparatus for measuring internal body temperature utilizing infrared emissions 失效
    用于测量使用红外辐射的内部温度的方法和装置

    公开(公告)号:EP0180368A3

    公开(公告)日:1986-08-20

    申请号:EP85307383

    申请日:1985-10-14

    Abstract: A hand held probe unit has an infrared sensitive thermopile mounted in a metal housing kept at a constant reference temperature by a regulator circuit. A waveguide tube, surrounded by a thermally insulative probe, directs infrared emissions to the thermopile. The thermopile and regulator circuit of the probe unit are electrically connected to processing circuitry in a chopper unit. Prior to taking a patient's temperature, the probe unit is mated with the chopper unit so that the thermopile detects infrared emissions from a reference target which is also kept at a constant reference temperature by another regulator circuit. The processing circuitry repeatedly acquires the output level of the thermopile and stores calibration data. The probe unit is then removed from the chopper unit, the probe is covered with an IR transparent, disposable speculum, and is inserted in the patient's external ear canal. The processing circuitry then determines the patient's core temperature by comparing the stored calibration data to the maximum output of the thermopile during a succession of ear canal samplings.

    Method and apparatus for measuring cardiac output
    23.
    发明公开
    Method and apparatus for measuring cardiac output 失效
    用于测量心脏输出量的方法和装置

    公开(公告)号:EP0092438A3

    公开(公告)日:1986-01-22

    申请号:EP83302246

    申请日:1983-04-20

    CPC classification number: A61B5/14542 A61B5/0275 A61B5/1473 A61B5/6852

    Abstract: Cardiac output is measured utilizing an indicator, such as saline, which alters blood resistivity, and an electrically calibrated conductivity cell positioned at the tip of a catheter. The catheter with the tetrapolar conductivity cell at the top is inserted into a blood vessel for current injection to develop a potential which is proportional to blood resistivity for inscribing the dilution curve occurring due to injection of the indicator, which curve is utilized to determine blood flow or cardiac output.

    Detection of fetal death
    24.
    发明公开
    Detection of fetal death 失效
    检测死亡

    公开(公告)号:EP0092982A3

    公开(公告)日:1985-06-19

    申请号:EP83302277

    申请日:1983-04-21

    CPC classification number: A61B5/4362 A61B5/035 A61B5/0444 A61B5/0448

    Abstract: Systems and methods are provided for diagnosing the death of a fetus in utero. A first ECG signal from the fetus is detected. A second ECG signal from the mother simultaneously is detected. The two ECG signals are displayed on a common time base and compared to determine whether an ECG component originating with the fetus is present in the first ECG signal.

    Abstract translation: 系统和方法用于诊断子宫内胎儿的死亡。 检测来自胎儿的第一个ECG信号。 检测到来自母体的第二ECG信号。 两个ECG信号在公共时基上显示并进行比较,以确定是否存在始发于胎儿的ECG分量在第一ECG信号中。

    Temperature responsive transmitter
    28.
    发明公开
    Temperature responsive transmitter 失效
    温度响应发射器

    公开(公告)号:EP0243573A3

    公开(公告)日:1988-09-28

    申请号:EP87100293

    申请日:1987-01-12

    CPC classification number: A61B5/0008 G01K7/32

    Abstract: A temperature responsive transmitter in which frequency varies linearly with temperature includes two identically biased transistors, T i , T 2 connected in parallel. A capacitor C l , which reflects into the common bases to generate negative resistance in parallel with the capacitor, is connected to the common emitters. A crystal 30 is in parallel with the capacitor and the negative resistance. Oscillations occur if the magnitude of the absolute value of the negative resistance is less than the positive resistive impedance of the capacitor and the inductance of the crystal. The crystal has a large linear temperature coefficient and a resonant frequency which is substantially less than the gain-bandwidth product of the transistors to ensure that the crystal primarily determines the frequency of oscillation. A high-Q tank circuit having an inductor, L, and a capacitor C 2 is connected to the common collectors to increase the collector current flow, which in turn enhances the radiation of the oscillator frequency by the inductor.

    Calibration method and apparatus for optical-response tissue-examination instrument
    29.
    发明公开
    Calibration method and apparatus for optical-response tissue-examination instrument 失效
    光学组织检查仪器的校准方法和装置

    公开(公告)号:EP0175537A3

    公开(公告)日:1988-08-31

    申请号:EP85306419

    申请日:1985-09-10

    CPC classification number: G01N21/274

    Abstract: A device (50; 100) for calibrating optical-response tissue-examination apparatus is coupled between the sending and receiving components of the apparatus; the equipment is then run through a test cycle to thereby project selected light spectra into an inlet (119, 121) to the calibration device and receive such light as it emerges from the calibration device through an outlet (170) after passing along a tortuous path (122, 133, 128; 156, 158, 162, 164). The calibration device provides known, standardized light-transfer characteristics (diffusion and attenuation) which condition the detected emergent light energy in a known and precisely repeatable manner, whereby such conditioned light energy may be used to analytically characterize the optical-response apparatus itself. The calibration device incorporates a sample cell (154) whereby the emergent light energy may also be particularly characterized in terms of the known effects on light transfer caused by the selected media. Two or more such media may be utilized so that the emergent ligth characterized by each different media may be mutually compared, to thereby establish calibration constants for the overall optical capabilities of the optical-response apparatus under calibration. Thus, in subsequent operation of the calibrated apparatus, during actual tissue-examination, the calibration constants so determined may be used to modify nominal tissue-examination data and convert it into intrinsically accurate form which may be directly compared on a meaningful quantified basis to any other similarly calibrated tissue-examination apparatus.

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