JPH09289977A - Biological signal measurement sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate mounting and measurement and to repeatedly perform use. SOLUTION: An LED 10 and a phototransistor 9 are made to face each other and respectively mounted, a sensor part 2 provided with a pair of holding members 7 and 9 whose one end is turnably connected is movably attached on a base 1 and a cuff part 3 is attachably and detachably attached to one end of the base 1. The finger of a testee is mounted on the base 1 and the blood pressure and oxygen saturation of arterial blood passing through the finger are respectively measured by the sensor part 2 and the cuff part 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a biosignal measuring sensor capable of performing oxygen saturation measurement and non-invasive blood pressure measurement with a single sensor, and particularly to a biosignal measurement which is easy to operate and can be repeatedly used. Regarding sensors.

[0002]

2. Description of the Related Art Blood oxygen saturation and blood pressure are generally measured biosignal parameters. Conventionally,
When measuring these signals, a sensor for measuring oxygen saturation was individually attached to a fingertip, and a cuff for noninvasively measuring blood pressure was individually attached to an upper arm, a finger, or a wrist.

As a sensor of this type, an actual Kaihei 4-553 is used.
The device described in Japanese Laid-Open Patent Publication No. 08-2008 is known. FIG. 8 is a plan view showing the structure of this device. In FIG. 8, the biological information detection probe includes a cuff portion 101 and the cuff portion 101.
And an oxygen saturation measuring sensor unit 102 connected to the. The cuff portion 101 includes a cuff body 103, which is a band-shaped air bag, and fastener portions 104 and 104a. Further, one end of an air hose 105 and an electric cable 106 are connected to the cuff body 103, and the other end is connected to a finger blood pressure measuring unit, a pressurizing pump,
It is connected to the pressure sensor.

The oxygen saturation measuring sensor portion 102 is provided with fastener portions 108 and 108a on a fingertip winding portion 107, and a cuff portion 101 via an elastic connecting portion 109.
And are connected in parallel. A transparent sheet-shaped winding cloth portion 110 is formed so as to project from one side of the winding portion 107.

A light emitting portion 111 and a light receiving portion 112 for measuring blood pressure are provided in the surface of the cuff portion 101.
The finger artery is irradiated with light from 11, and the light receiving unit 112 receives the reflected light to measure the blood pressure. Further, the light receiving portion 113 is attached in the surface of the winding portion 107 of the oxygen saturation measuring sensor portion 102, and the light receiving portion 113 is in the surface of the winding cloth portion 110.
Is provided with a light emitting portion 114. Then, light is emitted from the light emitting unit 114 to the fingertip, light transmitted through the fingertip is received by the light receiving unit 113, and blood oxygen saturation is measured by the light receiving signal. Further, a thermistor 115 is provided in the center of the surface of the winding portion 107 so that the temperature of the finger can be measured.

[0006]

However, in the conventional biological signal measuring sensor constructed as described above, the cuff portion 101 and the oxygen saturation measuring sensor portion (hereinafter referred to as the sensor portion) 102 are respectively provided. Fastener part 10
4, 108 must be wrapped around the fingers and worn separately, and cannot be worn unless the operator uses both hands.
For this reason, there is a problem that it takes time and effort to mount and measure. In addition, the cuff body 103 and the sensor unit 10
Since the second winding portion 107 has a flexible structure, it is difficult to extend the finger and attach the cuff portion 101 when the finger is stiff, and the effective pressurizing range is narrowed. . Moreover, the cuff portion 101 and the sensor portion 102 are connected to each other by the connecting portion 1.
09, the cuff portion 101 is integrally connected.
The entire measuring sensor must be replaced if it becomes dirty or damaged. Further, the air hose 105 connected to the cuff portion 101 and the electric system cable 106 may be an obstacle or get tangled.

The present invention has been made in view of such circumstances, and an object thereof is to provide a biological signal measuring sensor which can be easily worn and measured and can be repeatedly used by replacing only the cuff portion. .

[0008]

In order to achieve the above object, a biological signal measuring sensor according to a first aspect of the present invention has a cuff portion for measuring a blood pressure value by applying pressure by rolling the finger around a living body. A sensor unit for measuring the oxygen saturation of the blood of a living body, which is provided with a light emitting unit and a light receiving unit for transmitting light passing therethrough, is mounted on the base so as to be movable relative to each other.

The biological signal measuring sensor according to claim 2 is
One end of a holding member that holds the light emitting unit and the light receiving unit of the sensor unit is rotatably connected.

The biological signal measuring sensor according to claim 3 is
The cuff portion is formed of a flexible member in a substantially cylindrical shape, and has an air inlet port on a side surface to be mounted on the base, and a side surface facing the air inlet port is divided along the axial direction. It is characterized by being

The biological signal measuring sensor according to claim 4 is
It is characterized in that a concavo-convex portion is formed on the outer periphery of the air inlet opening in the cuff portion.

The biological signal measuring sensor according to claim 5 is
The cuff portion is removable from the base.

The biological signal measuring sensor according to claim 6 is
A signal line for extracting a signal from the sensor unit to the outside and an air hose for supplying air to the cuff unit are bundled and attached to the base.

In the biological signal measuring sensor according to the first aspect of the present invention, since the cuff portion for measuring the blood pressure value and the sensor portion for measuring the oxygen saturation are mounted on the base, the finger is placed on the base. The sensor can be attached to the finger simply by placing it and closing the upper part. In addition, since the cuff part and the sensor part can move relative to each other on the base, the cuff part and the sensor part can be positioned according to the length of the subject's finger, which enables accurate measurement. Become.

In the biological signal measuring sensor according to the second aspect of the present invention, since one end of the holding member for holding the light emitting portion and the light receiving portion of the sensor portion is rotatably connected, the holding member is opened and operated. The person can wear it while confirming the position of the subject's finger.

In the biological signal measuring sensor according to the third aspect, since the upper end of the cuff portion is open, the operator can extend the finger of the subject even when the subject's finger is stiff. A cuff part can be attached.

In the biological signal measuring sensor according to the fourth aspect, since the uneven portion is formed on the outer circumference of the air inlet opening in the cuff portion, when the cuff portion is attached to the finger of the subject and tightened. Even if a finger is pressed against the air inlet, the air flow path is not blocked, and the air can be reliably introduced into the cuff portion.

In the biological signal measuring sensor according to the fifth aspect, since the cuff portion can be attached to and detached from the base,
If the cuff becomes dirty or damaged, the measuring sensor can be used repeatedly by replacing only the cuff.

In the biological signal measuring sensor according to the sixth aspect, since the signal line from the sensor section and the air hose to the cuff are bundled and attached to the base, the signal line and the air hose obstruct the measurement. It does not get tangled or get tangled.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a biological signal measuring sensor of the present invention will be described below with reference to the drawings.

1 to 7 show the configuration of an embodiment of the present invention. In FIGS. 1 and 2, a sensor unit 2 for measuring oxygen saturation in blood flowing in a vein of a tip of a finger of a subject is mounted on a base 1 formed of plastic in a substantially box shape. The cuff part 3 is attached to the base side of the finger of the subject and measures the blood pressure value.

The sensor portion 2 is in sliding contact with both side surfaces of the base 1.
It comprises a lower holding member 5 having a pair of legs 4, and an upper holding member 7 whose one end is rotatably connected to one end of the lower holding member 5 via a support shaft 6 as shown in FIG. There is.
The sensor unit 2 is mounted movably on the base 1 via the legs 4, and the upper holding member 7 is urged to rotate in a direction of coming into contact with the lower holding member 5 via a coil spring 8. . On the inner surfaces of the lower holding member 5 and the upper holding member 7, a phototransistor 9 as a light receiving portion and an LED 10 as a light emitting portion are held at opposite positions.

As shown in FIG. 4, the cuff portion 3 is made of a flexible material and is formed into a substantially cylindrical shape. A pair of hook portions 11 project from the outer periphery of the lower surface and are integrally formed in the axial direction. A pair of connecting holes 12 are formed in the upper surface of the base 1 in parallel to the longitudinal direction, and by fitting the hook portions 11 into the connecting holes 12, the cuff portion 3 can be attached to and detached from the base 1. It can be attached to a stop. The upper surface of the cuff portion 3 is divided along the axial direction, and the finger of the subject can be attached to the cuff portion 3 by expanding the dividing portion 13.

A band-shaped sealed air bag 14 is attached to the inner circumference of the cuff portion 3, and the hook portion 1 on the lower surface of the cuff portion 3 is attached.
An air introduction port 15 that opens into the air bag 14 is provided between the two. As shown in FIG. 1, the air inlet 15 has
A conical connecting portion 17 is integrally formed so as to project outward and the air passage 16 is formed at the center thereof. A cylindrical connecting shaft 18 is provided between the connecting holes 12 on the upper surface of the base 1.
Is provided, and when the cuff portion 3 is mounted on the base 1, the connecting shaft 18 is inserted into the connecting portion 17 so as to be fitted in an airtight manner. Further, the split portion 13 on the upper surface of the cuff portion 3
One end of the hook-and-loop fastener 19 is fixed to one side of the
A surface fastener 20 to which the surface fastener 19 is joined is provided on the opposite side of 3.

As shown in FIG. 5, a radial concave portion 21 and a fan-shaped convex portion 22 are concentrically formed on the outer periphery of the portion of the air introducing port 15 which is opened in the air bag 14. This structure prevents the air introduction port 15 from being closed when the subject's finger is wound by the cuff portion 3 and the air bag 14 is pressed.

As shown in FIG. 1, one end of an air hose 23 is connected to the connecting shaft 18, and the other end of the air hose 23 is connected to a pressure pump and a pressure sensor (not shown). Further, one end of a signal line 24 is connected to the sensor unit 2, and the other end of the signal line 24 measures a blood oxygen saturation level by a power source unit (not shown) that supplies power to the LED 10 and a light receiving signal of the phototransistor 9. Connected to a measuring unit (not shown). The signal line 24 is fixed to the lower surface of the base 1 via the slack necessary for movement in the sensor unit 2, and the portion pulled out to the cuff portion 3 side is bundled together with the air hose 23. A fixing band 25 for fixing the entire sensor to the subject's hand is attached to one end of the base 1 on the cuff portion 3 side.

Next, a method of using the biological signal measuring sensor according to the present embodiment having the above-described structure will be described. The cuff portion 3 is attached to the base 1, the split portion 13 of the cuff portion 3 is opened, and the operator attaches it to one finger of the subject. At this time, the operator rolls the cuff portion 3 around the finger base while extending the finger of the subject, and adheres the hook-and-loop fasteners 19 and 20 to the finger.
Then, the fixing band 23 is wrapped around the hand to fix the whole sensor in the hand.

Next, the upper holding member 7 of the sensor unit 2 is opened and the fingertip is placed on the lower holding member 5, and the operator confirms the fingertip position of the examinee while placing the sensor unit 2 on the base 1. After moving it and positioning it in a predetermined position according to the length of your finger,
The upper holding member 7 is closed and a finger is clamped. Then, air is sent from the air hose 23, and the connecting portion 17 and the air passage 1
Air is supplied from the air introduction port 15 into the air bag 14 through the air bag 6 to inflate it, and the blood pressure in the arteries of the finger is measured by a known method.

At the same time, the LED 10 of the sensor section 2 is connected to the signal line 2
The light that is transmitted through the fingertip of the subject is received by the phototransistor 9, and the light is turned on via the phototransistor 9.
A signal emitted from the device is sent to the measurement unit via the signal line 24, and the oxygen saturation of the blood flowing in the artery of the fingertip of the subject is measured. FIG. 6 shows a state in which the measurement sensor is attached to the finger 31 of the subject.

According to the present embodiment, the cuff part 3 for measuring the blood pressure value and the sensor part 2 for measuring the oxygen saturation are mounted on the same base 1, so that the base 1 can be tested. The measurement sensor can be attached to the finger easily and quickly by simply placing the person's finger and closing the upper portions of the cuff portion 3 and the sensor portion 2. Further, since the sensor unit 2 is movable on the base 1, the cuff unit 3 of the sensor unit 2 is adjusted according to the length of the finger of the subject.
Can be easily positioned, and accurate measurement is possible.

Further, since one ends of the holding members 7 and 5 respectively holding the LED 10 of the sensor section 2 and the phototransistor 9 are rotatably connected, the operator wears them while checking the position of the finger of the subject. Therefore, the oxygen saturation can be accurately measured.

Further, since the upper end of the cuff portion 3 is open, the operator can wear the cuff portion 3 while extending the finger of the subject even if the subject's finger is rigid, which is effective. The pressure range can be widened.

Further, since the concave portion 21 and the convex portion 22 are formed on the outer periphery of the air introduction port 15 that opens into the air bag 14 of the cuff portion 3, when the cuff portion 3 is attached to the finger of the subject and tightened. In addition, even if the finger of the subject presses the air bag 14, the air inlet 1
It is possible to reliably introduce the air into the air bladder 14 without blocking the air flow passage of No. 5.

Further, since the cuff portion 3 can be attached to and detached from the base 1, even if the cuff portion 3 becomes dirty or damaged, the measurement sensor can be repeatedly used only by replacing the cuff portion 3. .

Further, a signal line 24 connected to the sensor section 2
The air hose 23 connected to the cuff 3 is fixed to the lower surface of the base 1 and is bundled with the signal line 24, so that the signal line 24 and the air hose 23 do not get in the way during measurement or get entangled. be able to.

In the above embodiment, the case where the sensor unit 2 is movably mounted on the base 1 and the cuff 3 is detachably fixed on the base 1 has been described. The cuff portion 3 may be fixed on the base 1 and movably mounted on the base 1. In this case, if the cuff portion 3 can be pulled out from the base 1, only the cuff portion 3 can be replaced. Further, as shown in FIG. 7, the polyethylene sheet 41 is integrally formed between the air bag 14 and the cylindrical cuff body 3 so that the cuff body 3 made of a flexible member absorbs the pulse wave. Can be prevented.

[0037]

As described above, according to the biological signal measuring sensor of the present invention, the cuff portion which is wound around the finger of the living body to measure the blood pressure value, and the sensor portion which measures the oxygen saturation of the blood of the living body. Since the and are mounted on the base so that they can move relative to each other, the measurement sensor can be easily mounted on the finger simply by placing the patient's finger on the base and closing the upper part of the cuff part and the sensor part. Can be done. Also, since the cuff part and the sensor part can move relative to each other on the base, the relative position of the cuff part and the sensor part can be easily determined according to the length of the subject's finger, and accurate measurement can be performed. Is possible. Further, since the cuff portion is detachable from the base, even if the cuff portion becomes dirty or damaged, the measurement sensor can be repeatedly used by only replacing the cuff portion.

[Brief description of drawings]

FIG. 1 is a side view showing a configuration of an embodiment of a biological signal measuring sensor of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a side view showing a state where the sensor unit of FIG. 1 is opened.

FIG. 4 is an exploded perspective view showing a configuration of a cuff portion of FIG.

5 is a perspective view showing a configuration of an air introduction port of the cuff portion of FIG.

6 is a side view showing a state in which the finger of the subject is attached to the measurement sensor of FIG.

FIG. 7 is a perspective view showing another configuration of the cuff portion of the biological signal measuring sensor of the present invention.

FIG. 8 is an explanatory diagram showing a configuration of an example of a conventional biological signal measuring sensor.

[Explanation of symbols]

 1 Base 2 Sensor part (sensor part for measuring oxygen saturation) 3 Cuff part 5, 7 Holding member 9 Phototransistor (light receiving part) 10 LED (light emitting part) 13 Dividing part 15 Air introduction port 21 Recessed part 22 Convex part 23 Air hose 24 signal lines

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hideo Ozawa 1-34-1 Nishiochiai, Shinjuku-ku, Tokyo Inside Nihon Kohden Kogyo Co., Ltd.

Claims (6)

[Claims] 1. A sensor for measuring oxygen saturation of blood in a living body, which includes a cuff portion which is wound around a finger of the living body to measure a blood pressure value and a light emitting portion and a light receiving portion of light passing through the finger. A biological signal measuring sensor, wherein the part and the part are mounted on a base so as to be movable relative to each other. 2. The biological signal measuring sensor according to claim 1, wherein one end of a holding member that holds the light emitting unit and the light receiving unit of the sensor unit is rotatably connected to each other. 3. The cuff portion is formed of a flexible member in a substantially cylindrical shape, and has an air introduction port on a side surface to be attached to the base, and a side surface facing the air introduction port is arranged in an axial direction. The biological signal measuring sensor according to claim 1, wherein the biological signal measuring sensor is divided along the same. 4. The biological signal measuring sensor according to claim 3, wherein a concavo-convex portion is formed on the outer circumference of the air inlet opening in the cuff portion. 5. The biological signal measuring sensor according to claim 1, wherein the cuff portion is attachable to and detachable from the base. 6. A signal line for taking out a signal from the sensor unit to the outside and an air hose for supplying air to the cuff part are attached to the base in a bundle. The biological signal measuring sensor described.