Pulse wave measuring apparatus and pulse wave measuring method
First Claim
Patent Images
1. A pulse wave measuring apparatus comprising:
- a photoelectric sensor having a light-emitting portion positionable to emit light to a vessel under a skin of a patient, and a light-receiving portion positionable to receive reflected light from the vessel;
a blood pressure meter; and
a control portion adapted to determine a pulse wave based upon a time-dependent change of a state of the vessel based on the reflected light.
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Abstract
A maximum blood pressure and a minimum blood pressure are first measured using an oscillometric method. Pulse waves of a vessel occurring during the measurement are measured by a reflection-type photoelectric sensor. The maximum and minimum blood pressures and the pulse waves occurring at the times of maximum and minimum blood pressures are associated with each other. After that, the blood pressure is calculated from the associated values and the pulse waves of the vessel serially detected by the reflection-type photoelectric sensor.
92 Citations
36 Claims
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1. A pulse wave measuring apparatus comprising:
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a photoelectric sensor having a light-emitting portion positionable to emit light to a vessel under a skin of a patient, and a light-receiving portion positionable to receive reflected light from the vessel;
a blood pressure meter; and
a control portion adapted to determine a pulse wave based upon a time-dependent change of a state of the vessel based on the reflected light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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17. A pulse wave measuring apparatus comprising:
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a photoelectric sensor which has a light-emitting portion that emits a light to a heart under a skin of a chest of a patient and a light-receiving portion that receives a reflected light from the heart, and which detects a position of a surface of the heart from an amount of the reflected light;
a blood pressure meter; and
a control portion that measures, as a pulse wave, a time-dependent change of the position of the surface of the heart based on the reflected light.
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18. A pulse wave measuring method comprising:
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emitting a light to a vessel under a skin of a patient;
receiving a reflected light from the vessel; and
determining, as a pulse wave, a time-dependent change of a state of the vessel based on the reflected light.
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36. A pulse wave measuring method comprising:
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emitting a light to a heart under a skin of a chest of a patient;
receiving a reflected light from the heart;
measuring a blood pressure of the patient; and
determining, as a pulse wave, a time-dependent change of a state of a heart based on the reflected light.
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Specification