Pulse detecting device and ultrasound diagnostic apparatus
First Claim
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1. An ultrasound diagnostic apparatus comprising:
- a transmitting piezoelectric element that transmits an ultrasound to a diagnostic portion of a body in response to an input drive signal;
a receiving piezoelectric element that receives an echo produced by reflection of the ultrasound by the diagnostic portion of the body;
a substrate having two spaced-apart non-contacting substrate sections, the transmitting piezoelectric element being disposed on and fixed to a surface of one substrate section and the receiving piezoelectric element being disposed on and fixed to a surface of the other substate section;
a support member supporting the substrate, the support member having two spaced-apart side wall portions that have tops and bottoms, and a base portion interconnecting the bottoms of the two side wall portions, the two substrate sections being disposed on and supported by the tops of the two side wall portions so that the two substrate sections of the substrate jointly define with the two side wall portions and the base portion of the support member an enclosed gap that attenuates unwanted propagation of the transmitted ultrasound; and
an information obtaining circuit that obtains information concerning the diagnostic portion of the body based on the transmitted ultrasound and the received echo.
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Abstract
There is provided a pulse detecting device which resists fluctuations in the quality by locating an ultrasound transmitting piezoelectric element and an ultrasound receiving piezoelectric element with high precision. In the pulse detecting device, a detection sensitivity of the pulse is improved. A transmitting piezoelectric element and a receiving piezoelectric element are fixed onto a substrate by electrodes. The transmitting piezoelectric element is excited in response to an inputted drive voltage signal to generate an ultrasound and transmits the generated ultrasound to a living body. The receiving piezoelectric element receives an echo produced by reflecting the ultrasound transmitted into the living body by a blood flow of the living body and converts it into a voltage signal. A processing arithmetic unit compares the frequency of the ultrasound generated by the transmitting piezoelectric element with that of the echo received in the receiving piezoelectric element to thereby detect a pulse.
14 Citations
17 Claims
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1. An ultrasound diagnostic apparatus comprising:
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a transmitting piezoelectric element that transmits an ultrasound to a diagnostic portion of a body in response to an input drive signal; a receiving piezoelectric element that receives an echo produced by reflection of the ultrasound by the diagnostic portion of the body; a substrate having two spaced-apart non-contacting substrate sections, the transmitting piezoelectric element being disposed on and fixed to a surface of one substrate section and the receiving piezoelectric element being disposed on and fixed to a surface of the other substate section; a support member supporting the substrate, the support member having two spaced-apart side wall portions that have tops and bottoms, and a base portion interconnecting the bottoms of the two side wall portions, the two substrate sections being disposed on and supported by the tops of the two side wall portions so that the two substrate sections of the substrate jointly define with the two side wall portions and the base portion of the support member an enclosed gap that attenuates unwanted propagation of the transmitted ultrasound; and an information obtaining circuit that obtains information concerning the diagnostic portion of the body based on the transmitted ultrasound and the received echo. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An ultrasound diagnostic apparatus comprising:
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a transmitting piezoelectric element that transmits an ultrasound to a diagnostic portion of a body in response to an input drive signal; a receiving piezoelectric element that receives an echo produced by reflection of the ultrasound by the diagnostic portion of the body; a substrate having two spaced-apart non-contacting substrate sections, the transmitting piezoelectric element being disposed on and fixed to a surface of one substrate section and the receiving piezoelectric element being disposed on and fixed to a surface of the other substate section; a support member supporting the substrate, the support member having a base portion and a plurality of projections projecting outwardly from the base portion, the two substrate sections being disposed on and supported by the projections so that the two substrate sections of the substrate jointly define with the projections and the base portion of the support member a gap that attenuates unwanted propagation of the transmitted ultrasound; and an information obtaining circuit that obtains information concerning the diagnostic portion of the body based on the transmitted ultrasound and the received echo. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification
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Current AssigneeSeiko Instruments Incorporated (Seiko Group)
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Original AssigneeSeiko Instruments Incorporated (Seiko Group)
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InventorsOdagiri, Hiroshi, Shinogi, Masataka, Muramatsu, Hiroyuki, Nakamura, Takahiko
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Primary Examiner(s)Casler; Brian
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Assistant Examiner(s)Roy; Baisakhi
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Application NumberUS11/096,876Publication NumberTime in Patent Office1,824 DaysField of Search600/459, 600/437, 600/461, 600/462, 367/117, 367/118US Class Current600/459CPC Class CodesA61B 5/02438 with portable devices, e.g....A61B 5/02444 Details of sensor A61B5/024...A61B 8/4218 characterised by articulate...A61B 8/4483 characterised by features o...
