JPH05111471A - Pulse wave measuring instrument - Google Patents

Abstract

PURPOSE:To provide the pulse wave measuring instrument which can exactly measure a change in pulse waves by preventing a disturbance, such as space noise, at the time of measuring the pulse waves. CONSTITUTION:This pulse wave measuring instrument is constituted of a pulse wave sensor section 9 which detects an increase and decrease in the blood volume at a finger tip 13, i.e., pulse waves, by a photoelectric transducer 2 having a light emitting part 10 and a light receiving part 11 and a body section 4 which has an amplifier 5 for amplifying the output of this pulse wave sensor section 9, an arithmetic processing part 6 for detecting the characteristic of the output waveform of the pulse wave sensor section 9 by adding arithmetic processing, such as differentiation, to the amplified output of the pulse wave sensor section 9 and a display device 7 for displaying the detection result of the processing by means, such as waveforms or numerical value. The above- mentioned pulse wave sensor section 9 is built into the body section 4 to constitute the integral structure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pulse wave measuring device used for diagnosis and treatment in medical institutions.

[0002]

2. Description of the Related Art Conventionally, in this kind of medical pulse wave measuring apparatus, a pulse wave sensor section for detecting a pulse wave and a main body section for carrying out arithmetic processing such as amplifying and differentiating the output of the pulse wave sensor section. It was separated from (hereinafter simply referred to as the main body).

An example thereof is shown in FIG. In FIG. 3, 1
Is a pulse wave sensor unit worn on the fingertip, and 2 is a signal line connecting the sensor unit 1 to the main body 3.

[0004]

However, in the configuration of the conventional medical pulse wave measuring device, the electrical signal of the pulse wave detected by the pulse wave sensor unit is transmitted to the main body by a relatively long signal line of several tens of cm. It was On the other hand, when the pulse wave fluctuation is converted into an electric signal, it can be captured as an extremely minute electric signal change of several mV. Therefore, even if a shield wire is used as the signal wire, as long as the pulse wave sensor unit and the main body are separated,
There is a problem that it is difficult to obtain an accurate electric signal change by superimposing the space nozzles. Also, since the pulse wave sensor part attached to the fingertip moves easily along with the movement of the human body, if the human body is moved during measurement, mechanical external force is easily applied to the connection part between the signal line and the main body, and this is also electric. It was an obstacle for transmitting signals.

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned problems, and a pulse wave measuring apparatus capable of accurately measuring the change of the pulse wave by preventing the disturbance at the time of measuring the pulse wave and eliminating the transmission disturbance of the electric signal. The purpose is to provide.

[0006]

In order to achieve the above object, the present invention provides a pulse wave sensor section for detecting an increase or decrease in blood volume of a fingertip, that is, a pulse wave, by amplifying and differentiating the output of the pulse wave sensor section. The arithmetic processing is added to detect the characteristics of the waveform,
The detection result is displayed as an integral structure with a main body for displaying the detection result by means such as a waveform or a numerical value.

[0007]

With the above structure, since the pulse wave sensor unit is built in the main body and integrated, the signal line that causes the spatial noise superposition becomes unnecessary, and the connection between the signal line and the main unit disappears. It is possible to always obtain an accurate pulse wave signal without influence of disturbance such as noise or external force applied to the signal line.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the pulse wave measuring device of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the external appearance of one embodiment of the pulse wave measuring device of the present invention, and FIG. 2 is a block diagram of the above embodiment including a detailed sectional view of a pulse wave sensor unit. In FIGS. 1 and 2, reference numeral 4 denotes a main body, which internally includes an amplifier 5 for amplifying a pulse wave signal, an arithmetic processing unit 6 for performing arithmetic processing such as differentiation, and the like, a display 7 made of liquid crystal, etc., and a keyboard. The operation unit 8 and the pulse wave sensor unit 9 are provided. As shown in FIG. 1, the pulse wave sensor unit 9 has a main body unit 4
The pulse wave sensor unit 9 includes a photoelectric conversion element 12 including a light emitting unit 10 and a light receiving unit 11. Note that 13 is the fingertip of the person to be measured.

Next, the operation of this pulse wave measuring apparatus will be described. When the fingertip 13 of the person to be measured is inserted into the pulse wave sensor unit 9, the light emitted from the light emitting unit 10 passes through the fingertip 13 of the person to be measured and is received by the light receiving unit 11. At this time,
The light-emitting portion 10 is generated by the blood passing through the fingertip 13 of the measurement subject.
Since a part of the light emitted from the
The amount of light reaching the point increases or decreases depending on the amount of blood passing through the fingertip 13 of the measurement subject. By detecting the increase / decrease in the amount of light, the increase / decrease in blood passing through the fingertip 13 is detected as a pulse wave. The pulse wave detected in this way is amplified by the amplifier 5, processed by the processing unit 6, and the result is displayed on the display 7.

As described above, the output from the pulse wave sensor unit 9 is a minute signal of several mV, but in the present invention, since the pulse wave sensor unit 9 is integrally incorporated in the main body unit 4, it is influenced by spatial noise. A pulse wave measuring device that is easy to handle can be realized because it does not receive the signal and does not require a signal line.

[0011]

As is apparent from the above description, the pulse wave measuring device of the present invention has a configuration in which the pulse wave sensor unit is integrally incorporated in the main body unit, and therefore the output signal of the pulse wave sensor unit is a spatial noise sensor. Since it is not affected and the signal line is not exposed to the outside, there is no unreasonable external force applied to the connection part between the signal line and the main body, reliable signal processing can be performed, measurement error does not occur, accurate A highly reliable pulse wave measuring device capable of obtaining medical data can be provided.

[Brief description of drawings]

FIG. 1 is a perspective view showing the appearance of an embodiment of a pulse wave measuring device of the present invention.

FIG. 2 is a block configuration diagram of the embodiment including a detailed sectional view of a pulse wave sensor unit.

FIG. 3 is a perspective view showing the appearance of a conventional pulse wave measuring device.

[Explanation of symbols]

 4 main body section 5 amplifier 6 arithmetic processing section 7 indicator 9 pulse wave sensor section 10 light emitting section 11 light receiving section 12 photoelectric conversion element 13 fingertip

Claims (1)

[Claims] 1. A pulse wave sensor unit for detecting an increase or decrease in blood volume of a fingertip, that is, a pulse wave by a photoelectric conversion element having a light emitting unit and a light receiving unit, an amplifier for amplifying the output of the pulse wave sensor unit, and an amplified pulse. It is composed of an arithmetic processing unit that applies arithmetic processing such as differentiation to the output of the wave sensor unit to detect the characteristics of the waveform, and a main unit that includes a display that displays the processing detection result by means of waveform or numerical value. A pulse wave measuring device in which a pulse wave sensor unit is built in a main body unit and configured as an integrated structure.