JPH0415045A - Blood monitoring belt - Google Patents

Abstract

PURPOSE:To mount a belt according to the dimension of an installation part by installing a luminous element and a light receiving element on a belt and allowing both the edges of the belt to be engaged with each other at a desired position. CONSTITUTION:The installation parts 1 and 2 are formed so that two recessed parts for embedding a luminous element and light receiving element are formed at a prescribed interval, and a stepped part for fitting a cover part 13 is formed on the inner wall of the edge part. The stepped part is formed also on a belt part 17 for relaying the installation parts 1 and 2 and a groove part 16. Further, in the recessed part of the installation part, the window parts 11a and 12a for the appearance of the luminous surface and light receiving surface of the luminous element and light receiving element on a belt surface, are formed on the recessed part of the installation part. Sure installation is permitted independently of the thickness of a finger by changing the position of a hook engaged with an engagement part 15, according to the thickness of the finger, and light is irradiated from the luminous element to the inside of a tissue, and the transmission light is measured by the light receiving element, and the variation of the in-blood component in the tissue is monitored from the variation of the light receiving quantity.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a blood monitoring device for photoelectrically non-invasively monitoring components in blood, and particularly to a blood monitoring device of this type with improved wearability. Regarding the surveillance belt.

[Prior art and problems to be solved by the invention] A patient's blood components, especially oxygen concentration, are elements that can reliably detect abnormalities in breathing or circulation, and therefore can be detected without sampling blood. Devices (probes, sensors) that photoelectrically measure blood oxygen concentration (non-invasively) have been proposed (Japanese Patent Laid-Open Nos. 59-64031 and 60-34432).
issue).

One such device is a clamp-type sensor, in which a light emitting diode and a light sensor are attached to opposing crimping parts of a clamp, and the finger is fixed so as to be sandwiched between the light emitting diode and the light sensor. The light emitted from the light emitting diode changes as it is optically absorbed by the blood in the tissue passing through it, and this change is received by the optical sensor.

Changes due to this light absorption vary depending on the oxygen saturation of hemoglobin in the blood, and the blood concentration can be monitored by monitoring this variation.

However, in the case of this clamp-type sensor, there is a problem in that the pressure of the spring attached to the tissue reduces the blood flow to the tissue, making accurate measurement impossible.

On the other hand, the sensor disclosed in JP-A No. 60-34432 has a light emitting element and a light receiving element on a flexible substrate with an adhesive surface, and does not have the problems of the clamp type. Although there are no problems such as the sensor coming off due to patient movement or inaccurate measurements, the mounting location is limited depending on the shape or size of the sensor.In other words, there are many shapes that correspond to the mounting location. , the disadvantage is that a sensor of the same size must be prepared. Additionally, in order to measure accurately, it is desirable to mount the light-emitting element and the light-receiving element so that the light-emitting and light-receiving surfaces face each other, but in conventional sensors, the distance between the light-emitting element and the light-receiving element is fixed. However, it is not necessarily possible to install the two so that they face each other. Furthermore, the adhesive may have an adverse effect on the skin, such as a rash.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a blood monitoring belt that can be installed in accordance with the size of the attachment site by solving such conventional problems.

Another object of the present invention is to allow the light-emitting element and the light-receiving element to be mounted so as to face each other, thereby improving measurement accuracy.

[Means for Solving the Problems] The blood monitoring belt of the present invention that achieves the above objects has the following features:
A light-emitting element that irradiates light from the surface of a living body into a tissue, a light-receiving element that receives light transmitted by the light-emitting element and transmits a light-receiving signal corresponding to a blood component in the tissue, and these light-emitting elements and It consists of a belt on which light receiving elements are provided at predetermined intervals, and preferably at least one of the light emitting element and the light receiving element is slidably attached to the belt.

Further, the belt includes a hook portion having a plurality of hook shapes disposed in the longitudinal direction at one end, and a locking portion to which one of the hook shapes is engaged at the other end.

[Operation] Apply the blood monitoring belt to a part of the body such as a finger or foot so that the light emitting element and the light receiving element face each other, and engage the hook at the position corresponding to the size of the part with the locking part. Attach to the body part.

Thereafter, light is irradiated into the tissue from the light-emitting element, and the transmitted light is measured by the light-receiving element, and fluctuations in blood components within the tissue are monitored from fluctuations in the amount of received light.

Here, by changing the position of the hook that engages with the locking portion, it is possible to fit the device in accordance with the size of the site without applying inappropriate pressure to the site.

Moreover, by sliding the light emitting element or the light receiving element, the interval between the light emitting element and the light receiving element can be changed, and these elements can be positioned at the optimum position of the part.

[Example] Hereinafter, the blood monitoring belt of the present invention will be described based on an example shown in the drawings.

A blood monitoring belt 1 shown in FIGS. 1 to 6 includes a flexible belt 10 integrally molded from resin such as polyvinyl chloride or nitrile butyl rubber, a light emitting element 2, and a light receiving element 3.
The light emitting element 2 is preferably a light emitting diode or the like which emits light of a certain wavelength, and the lead 1i! It is connected to a power source (not shown) via 4, and irradiates a predetermined amount of light from the skin surface into the tissue. The light receiving element 3 is a photoelectric sensor that receives the light emitted from the light emitting element 2 and transmitted through the tissue, and generates a current signal according to the amount of light, and is connected to a monitoring device (not shown) via a lead wire 4. The monitoring device processes the signal from the light receiving element 3 and displays its fluctuation as a value corresponding to a blood component such as oxygen concentration in the tissue.

On the other hand, the belt 10 includes a mounting part 11, 12 for housing a light emitting element and a light receiving element, a lid part 13, a hook part 14, and a locking part 15.
and a groove 16 for the lead wire 4 (FIG. 2).

The mounting part 11.12 is formed with two four parts spaced apart from each other by a predetermined distance for embedding the light emitting element 2 or the light receiving element 3, and the lid part 13 is fitted therein as shown in FIG. A step portion 11b is formed on the inner wall of the edge. This stepped portion 11b is the part 1 of the belt that connects the mounting portions 11 and 12.
7 and the groove portion 16 as well. Furthermore, windows 11a and 12a are formed in the recessed portion of the attachment portion so that the light-emitting surface and light-receiving surface of the light-emitting element 2 and light-receiving element 3 appear on the belt surface, respectively.

The groove portion 16 is provided close to one of the mounting portions 11 and accommodates a portion of each lead wire 4 of the light emitting element 2 and the light receiving element 3.

The lid part 13 is provided connected to a part of the mounting part 11.12, and as shown in FIG.
A stepped portion 13a that engages with the bevel 13b is formed, and each stepped portion is configured to be detachable by utilizing the flexibility of the beveled material.

Next, the hook portion 14 is formed by disposing a plurality of pairs of protruding hook shapes in the longitudinal direction of the belt at both ends of the belt 10 in the width direction, and the hook portion 14 is provided with a plurality of pairs of hook shapes that protrude from each end in the width direction of the belt 10. A pair of the two are locked by the locking portion 15.

As shown in FIG. 6, the side surface of the locking part 15 is an opening 1 having widths DI and U2 that are equal to or slightly wider than the minimum width d1 and maximum width d2 of the hook part, corresponding to the hook shape.
5a is formed, and one end side of this frontage 15a is open with a width smaller than the width of the hook.

Utilizing the flexibility of the belt material, this open portion is expanded and the hook member 14 is fitted into the opening 15a, whereby the opening 15a and the hook shape are engaged and fixed.

FIGS. 7(a) and 7(b) are diagrams showing the state in which the blood monitoring belt of this embodiment is attached to the finger 5, respectively.

By changing the position of the hook that is locked to the locking part 15 according to the thickness of the finger 5, it is possible to securely attach the finger regardless of the difference in the thickness of the finger.

In the blood monitoring belt of the present invention configured as described above, the structure of the locking portion and the hook portion can be changed as desired. FIGS. 8(a), 8(b) to 14 are views showing other embodiments of the locking portion and the hook portion, respectively. Figure 8(a),(b)
) has a pair of rectangular notches 14a formed in the width direction of the belt 10;
), (b) hook portions 14 are formed in grooves 1 in the width direction of the belt 10.
4b is formed. Each of these hook parts 14 is engaged with a locking part 15 having an opening 15a having a shape corresponding to the notch 14a or groove 1.4b of the hook part, as shown in FIG. Note that the groove 14b is formed as shown in FIG. 10(c), (
It can have any shape such as a semicircle or a trapezoid as shown in d).

The hook portions shown in FIGS. 11(a) and 11(b) consist of a brim-like hook shape with an elliptical cross section.
As shown in (b), it is locked in a locking part 15 having an opening 15a whose opening becomes larger toward the bottom. Any of these hook shapes can be pushed in or removed from the open portion of the locking portion 15a by utilizing the flexibility of the belt material.

In addition, the hook shapes shown in FIGS. 10 and 11 have two rows or one row of holes 14° drilled in the longitudinal direction of the belt 10, respectively, and stepped projections 15b that fit into these holes as the locking portions 15. It has been established. In either case, by fitting the hook part into the hole in the locking part at the desired position, you can hold the belt with your fingers.
It can be attached to areas such as the tips of the feet, and can be removed by pulling on the hook side with some force.

Next, a second embodiment of the blood monitoring belt of the present invention will be described.

In this embodiment, as shown in FIG. 15, only one of the light-emitting element and the light-receiving element is fixed to the attachment part of the belt 10, and the other element is attached to the slider which is slidably attached to the belt 10. It is embedded in the moving member 18, and the spacing between the elements is variable.

The blood monitoring belt constructed in this way is shown in Fig. 16(a).
, as shown in (b), it is attached to the tips of the feet, fingers, etc.
At this time, the sliding member 18 is moved and mounted so that the light emitting element 2 and the light receiving element 3 can face each other at a desired location.

Incidentally, the configuration of the attachment part of the light emitting element, the locking part, and the hook shape is the same as that of the first embodiment.

Further, in this embodiment, both the light emitting element and the light receiving element can be fixed to separate sliding members and made movable with respect to the belt.

[Effects of the Invention] As is clear from the above embodiments, according to the blood monitoring belt of the present invention, the belt is provided with a light emitting element and a light receiving element,
Since both ends of the belt can be engaged at desired positions, the sensor can be reliably attached without applying inappropriate pressure depending on the thickness of the part to which it is attached, and accurate measurements can be made. Further, according to the blood monitoring belt of the present invention, since either one of the elements is movable, the light emitting element and the light receiving element can be positioned at a desired position of the attachment part.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a first embodiment of the blood monitoring belt of the present invention, FIGS. 2 and 3 are a plan view and a side view of the belt portion of the same embodiment, and FIGS. 4 to 6 are FIGS. 7(a) and 7(b) are partial cross-sectional views of the same embodiment, respectively, and FIGS. 8(a) and 8(b) are views showing the state in which the blood monitoring belt of the present invention is attached, respectively.
Cb) to FIG. 14 are diagrams showing another embodiment of the hook shape and the locking part, respectively, FIG. 15 is a diagram showing a second embodiment of the blood monitoring belt of the present invention, and FIG. 16(a), (b
) are diagrams each showing a state in which the blood monitoring belt of the present invention is worn. ...Blood monitoring belt ... Light emitting element ... Light receiving element 0 ... Belt 4 ... Hook part 5 ... Person in charge Stop part 8...Sliding member

Claims (1)

[Scope of Claims] 1. A light-emitting element that irradiates light into the tissue of a living body, a light-receiving element that receives light transmitted through the tissue and sends out a light-receiving signal corresponding to a blood component in the tissue, and the light-emitting element and A blood monitoring belt comprising a belt in which the light receiving elements are provided at predetermined intervals. 2. The blood monitoring belt according to claim 1, wherein at least one of the light emitting element and the light receiving element is slidably attached to the belt. 3. The belt has a hook portion having a plurality of hook shapes disposed in the longitudinal direction at one end, and a locking portion to which any one of the hook shapes is engaged at the other end. The blood monitoring belt according to claim 1 or 2.