JPH057203U - Photoelectric pulse wave measurement probe - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a probe for measuring a photoelectric pulse wave capable of preventing blood flow inhibition and allowing accurate and stable measurement of blood components. A photoelectric pulse wave measurement probe comprising a pair of support members 1 and 2 in which a light emitting member and a light receiving member are mounted facing each other near one end and rotatably connected near the other end,
Elastic members 2 are provided on the outer circumferences of the light emitting member and the light receiving member, respectively.
In addition to being covered with 3 and 24, corrugated surfaces 23a and 24a are formed on the opposing surfaces of the elastic members 23 and 24 so that the finger is pressed at many fulcrums during measurement.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention clamps a part of a living body such as a fingertip to measure components such as oxygen concentration in blood. The present invention relates to a probe for measuring a photoelectric pulse wave.

[0002]

[Prior art]

  As the detection end of a pulse oximeter that measures components such as oxygen concentration in blood, A probe that holds a fingertip and optically measures a pulse wave is used. This Plow The light emitting member is provided at the other end of the pair of supporting members whose one end is rotatably connected. A certain LED and a photodiode (hereinafter referred to as PD) which is a light receiving member are opposed to each other. The fingertips between the LED and PD and insert them by spring force. Is made. Then, the light emitted from the LED passes through the blood flowing in the blood vessel of the fingertip. The light is received by the PD, and the component in the blood is measured by the output value of the PD. .

[0003]

[Problems to be solved by the device]

  However, in the case of the conventional pulse oximeter probe, the fingertip is clamped and fixed. Since the opposing surface of the supporting member to be fixed is flat, the blood flow in the peripheral circulation system is bad. In a non-examined subject, blood flow is obstructed by being clamped by a support member with a strong spring force. There was a fear. As a result, accurate and stable measurement of blood components cannot be expected. There was a problem.

[0004]   The present invention has been made in view of the above points, and prevents the occurrence of blood flow obstruction. Providing a photoelectric pulse wave measurement probe that can accurately and stably measure blood components The purpose is to do.

[0005]

[Means for Solving the Problems]

  The probe for measuring a photoelectric pulse wave according to claim 1 has a light emitting member and a light receiving member, respectively. A photoelectric device including a pair of support members provided so as to face each other near their ends. In the pulse wave measuring probe, the light emitting member and the light receiving member are opposed to each other. It is characterized in that an uneven portion is formed on at least one of the facing surfaces.

[0006]   The photoelectric pulse wave measuring probe according to claim 2, wherein the uneven portion has at least one of the facing surfaces. It is characterized in that it is a wavy surface formed on one side.

[0007]   In the photoelectric pulse wave measuring probe according to claim 3, the uneven portion has at least one of the facing surfaces. It is characterized by a plurality of protrusions provided on one side.

[0008]

[Action]

  According to the above configuration, for example, when the probe is pinched and fixed to the fingertip, The ridge and the back are contacted by the uneven parts formed on the facing surfaces of the light emitting member and the light receiving member. Since the number of blood vessels is large, the blood vessels of the finger in the part facing the recess are not compressed and blood in that part is not compressed. No flow obstruction occurs. As a result, based on the principle of pulse oximeter, Accurately stabilizes measurements of blood oxygen saturation or dye-diluted cardiac output You can do it.

[0009]

【Example】

  An embodiment of the photoelectric pulse wave measuring probe of the present invention will be described below with reference to the drawings. .

[0010]   1 to 5 show an embodiment of the present invention. In the figure, 1 provided opposite to each other Near the base ends of the pair of support members 1 and 2, a pair of shaft supporting portions 3 and 4 are integrally erected. Has been done. The support shaft 5 is inserted through the tips of the shaft support portions 3 and 4, and the support members 1 and 2 Are rotatably connected via a support shaft 5. Also, the coil spring 6 is attached to the support shaft 5. Both ends of the coil spring 6 are wound on the side surfaces on the base end side of the shaft support portions 3 and 4, respectively. The support members 1 and 2 are locked and are urged to rotate in a direction in which the tips of the support members 1 and 2 approach each other.

[0011]   Hollow box-shaped shield members 7 and 8 are provided on the inner surfaces of the support members 1 and 2 facing each other on the front end side. The LEDs 9 are fixed inside the facing surfaces of the shield members 7 and 8, respectively. , PD10 is attached. In addition, the back of LED9 and PD10 are Lint wiring boards (hereinafter referred to as PCBs) 11 and 12 are provided. Further shield Relay PCBs 13 and 14 are provided in the members 7 and 8, respectively. The lead wires 15 and 16 are connected to each other and to the lead wires 12 and 14, respectively. Also, a relay PC B13 and B14 are connected by a cord 17, and are installed inside the PCB 11 and the shield member 7. The lead wire 19 is connected to the fixed-cord connection PCB 18 that has been connected. And PCB One end of a signal relay cable 20 is connected to 18.

[0012]   On the other hand, outside the positions where the shield members 7 and 8 are aligned with the LEDs 9 and PD 10, respectively. On the side, caps 21 and 22 each made of silicon and formed into a disk shape are attached. It Also, by covering the shield members 7 and 8 and the caps 21 and 22, the sponge and Elastic members 23, 24 such as a tongue are provided, and the opposing surfaces of the elastic members 23, 24 have unevenness. Wavy surfaces 23a and 24a are formed as parts. Furthermore, the elastic members 23 and 24 are respectively Round holes 23b and 24b are formed at positions aligned with the optical axes of the LED 9 and the PD 10. There is. In addition, when the patient's finger is clamped by the support members 1 and 2, the finger is pressed against the abdomen of the finger. The side that comes into contact, that is, the side that comes into contact with the elastic member 23 on the LED 9 side and the back of the finger, that is, The elastic member 24 on the PD10 side is made of a slightly stiff material and has a wavy surface during measurement. Only the protrusions of 23a and 24a are in contact with the finger.

[0013]   According to the present embodiment, the proximal ends of the support members 1 and 2 are held by fingers and the distal ends are opened, When the fingertip is inserted into the end side and the probe is fixed to the fingertip by the biasing force of the coil spring 6. When the elastic member 23 is in contact with the ball of the finger, the corrugated surface 23a is in contact with the back of the elastic member 23. Since the corrugated surface 24a is formed on the surface of the elastic member 24, the corrugated surface and the back of the finger are corrugated. Only the convex portion of the curved surface abuts. Therefore, the finger is pressed by a large number of fulcrums, and the concave part of the wavy surface is The blood flow in the part of the finger that does not come into contact with the concave portion is opposed to the concave portion. Blood flow obstruction Prevents errors caused by measurement of peripheral pulse waves such as pulse oximeters However, accurate and stable measurement can be performed.

[0014]   In addition, the LED 9 and the PD 10 are respectively shield members 7 and 8 and elastic members 23 and 24. Since it is supported by the support members 1 and 2 via the This will reduce the effects of this and enable stable measurement. Further pressure on the probe finger Since the force is applied uniformly, the probe does not shift.

[0015]   6 and 7 show another embodiment of the present invention. In the embodiment described above, the elastic member 23, The case where the concavo-convex portion formed on the facing surface of 24 is the wavy surface 23a, 24a has been described. However, the uneven portion is composed of a plurality of cylindrical protrusions 31 as shown in FIGS. 6 and 7. May be. Reference numeral 32 shown in FIG. 6 is a net-shaped shield member. According to this embodiment However, the same effect can be obtained.

[0016]   Further, in each of the above-described embodiments, the uneven portion is provided on the opposing surfaces of the elastic members 23 and 24, but the elastic member 23 and 24 are omitted and the concave and convex portions are directly indicated by a pair of directing members 1 and 2 or shield members 7 and 8. It may be provided on the facing surface, or the uneven portion may be provided on at least one of the facing surfaces. Noh.   Further, in each of the above-described embodiments, a detailed description is given of a case where a part of the living body to be held is a fingertip. However, the present invention is not limited to this, and for example, the pulse of blood flow such as earlobe. The same operation can be performed as long as it can detect a motion.

[0017]

[Effect of device]

  As described above, according to the present invention, the photoelectric pulse wave measurement such as the pulse oximeter is performed. Of the light-emitting member and the light-receiving member on the probe for use at least on one side. As a result of the formation of blood vessels, the influence of blood flow obstruction during measurement disappears, and accurate and stable blood Liquid components can be measured. Also, the effects of vibration and tensile force of the cable Is also eased, and similarly stable measurement becomes possible.

[Brief description of drawings]

FIG. 1 is a perspective view showing the configuration of an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a main part of FIG.

FIG. 3 is a vertical sectional view of FIG.

FIG. 4 is an exploded perspective view of the LED side of FIG.

5 is an exploded perspective view of the PD side of FIG.

FIG. 6 is a perspective view showing the structure of an elastic member according to another embodiment of the present invention.

7 is a cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

1, 2 Support member 9 LED (light emitting member) 10 PD (light receiving member) 23a, 24a Wavy surface (uneven portion) 31 Protrusion (uneven portion)

Claims (3)

[Scope of utility model registration request] 1. A photoelectric pulse wave measuring probe comprising a pair of support members provided so that a light emitting member and a light receiving member face each other in the vicinity of their ends, wherein the light emitting member and the light receiving member are provided. A probe for photoelectric pulse wave measurement, characterized in that a concavo-convex portion is formed on at least one of the facing surfaces facing each other. 2. The photoelectric pulse wave measuring probe according to claim 1, wherein the uneven portion is a wavy surface formed on at least one of the facing surfaces. 3. The photoelectric pulse wave measuring probe according to claim 1, wherein the uneven portion is composed of a plurality of protrusions provided on at least one of the facing surfaces.