Device for measuring motion of living body organs

• US 4,252,129 A
• Filed: 11/07/1978
• Issued: 02/24/1981
• Est. Priority Date: 11/10/1977
• Status: Expired due to Term

• Current Assignee: Kohji Tamura, Yoshiaki Saitoh
• Original Assignee: Kohji Tamura, Yoshiaki Saitoh
• Inventors: Saitoh, Yoshiaki, Tamura, Kohji
• Primary Examiner(s): Kamm, William E.
• Application Number:
  US05/958,406
• Time in Patent Office: 840 Days
• Field of Search: 128/774, 128/782, 128/721, 128/722, 128/748, 128/903, 128/675, 128/680, 128/681, 128/687, 128/689, 128/694, 128/733, 128/775, 128/776, 128/777, 128/778, 128/779, 128/780 , 128/781
• US Class Current: 600/506
• CPC Class Codes: A61B 5/1126 using a particular sensing technique
• CPC Class Codes: Y10S 128/903 Radio telemetry

Abstract

In a device for measuring motion of living body organs, an essential part which defines the oscillation frequency of the oscillator circuit of the device for measuring same comprises an electro-mechanical oscillator of a quartz resonator and impedance elements as coils or capacitors. The motion of organs on a living body surface or in a living body causes impedance changes in an impedance element and therefore, the detector is capable of detecting and measuring living body organ motion through a change in frequency.

Claims

1. A device for measuring motion of a living body organ comprising:

oscillator means including quartz resonator means, two-terminal inductance means for producing an electromagnetic field and capacitor means in series arrangement, said oscillator means being operative to produce an output signal having a frequency in accordance with said resonator means, inductance means and capacitor means respectively, the introduction of said organ into said electromagnetic field causing said field and hence the effective inductance of said two-terminal inductance means to vary in accordance with the proximity of said organ to said inductance means, whereby said effective inductance and hence the frequency of said oscillator means output signal varies in accordance with the motion of said organ relative to said inductance means.

2. A device for measuring motion of living body organ as claimed in claim 1 wherein said capacitor means comprises a variable capacitor means.

3. A device for measuring motion of a living body organ as claimed in claim 1 wherein said inductance means comprises manually variable two-terminal inductance means.

4. A device for measuring motion of living body organ comprising:

oscillator means including quartz resonator means, two-terminal inductance means for producing an electromagnet field and capacitor means in parallel arrangement respectively;

said oscillator means being operative to produce an output signal having a frequency in accordance with said quartz resonator means, inductance means and capacitor means respectively, the introduction of said organ into said electromagnetic field causing said field and hence the effective inductance of said two-terminal inductance means to vary in accordance with the proximity of said organ to said inductance means, whereby said effective inductance and hence the frequency of said oscillator means output signal varies in accordance with the motion of said organ relative to said inductance means.

5. A device for measuring motion of living body organ as claimed in claim 4 wherein said capacitor means comprises variable capacitor means.

6. A device for measuring motion of living body organ as claimed in claim 4, wherein said inductance means comprises manually variable two-terminal inductance means.

7. A device for measuring motion of a living body organ comprising:

oscillator means including quartz resonator means, two-terminal inductance means for producing an electromagnetic field and capacitor means, said quartz resonator means and said two-terminal inductance means being in parallel arrangement and said capacitor means being in series with said parallel arrangement;

said oscillator means being operative to produce an output signal having a frequency in accordance with said quartz resonator means, inductance means and capacitor means respectively, the introduction of said organ into said electromagnetic field causing said field and hence the effective inductance of said two-terminal inductance means to vary in accordance with the proximity of said organ to said inductance means, whereby said effective inductance and hence the frequency of said oscillator means output signal varies in accordance with the motion of said organ relative to said inductance means.

8. A device for measuring motion of a living body organ comprising:

oscillator means including quartz resonator means, two-terminal inductance means for producing an electromagnetic field and capacitor means, said quartz resonator and said capacitor means being in parallel arrangement with each other and said two-terminal inductance means being in series with said parallel arrangement;

said oscillator means being operative to produce an output signal having a frequency in accordance with said quartz resonator means, inductance means and capacitor means respectively, the introduction of said organ into said electromagnetic field causing said field and hence the effective inductance of said two-terminal inductance means to vary in accordance with the proximity of said organ to said inductance means, whereby said effective inductance and hence the frequency of said oscillator means output signal varies in accordance with the motion of said organ relative to said inductance means.

9. A device for measuring motion of a living body organ comprising:

oscillator means including quartz resonator means, two-terminal inductance means for producing an electromagnetic field and capacitor means, said two-terminal inductance means and said capacitor means being in parallel arrangement with each other and said quartz resonator being in series with said parallel arrangement, said oscillator means being operative to produce an output signal having a frequency in accordance with said quartz resonator means, inductance means and capacitor means respectively, the introduction of said organ into said electromagnetic field causing said field and hence the effective inductance of said two-terminal inductance means to vary in accordance with the proximity of said organ to said inductance means, whereby said effective inductance and hence the frequency of said oscillator means output signal varies in accordance with the motion of said organ relative to said inductance means.