JP3116260B2 - Probe for pulse oximeter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pulse oximeter for detecting the pulsation of blood in blood vessels in the skin of the fetus's head in the uterus and measuring the oxygen saturation of blood from rupture to birth. Regarding the probe.

[0002]

2. Description of the Related Art The pulsation of blood in a blood vessel of a living body is detected,
2. Description of the Related Art As a probe for a pulse oximeter for measuring oxygen saturation of blood or the like, a probe attached to a foot, a hand, an earlobe, or the like is conventionally known.

[0003]

However, it has heretofore been difficult to detect the pulsation of blood in the uterus from rupture of the fetus to delivery.

The present invention has been made in view of such circumstances, and a pulse oximeter capable of detecting blood pulsation from the breakage of a fetus in the uterus to birth and measuring the oxygen saturation and the like of the blood. The purpose of the present invention is to provide a probe.

[0005]

In order to achieve the above object, the present invention according to claim 1 irradiates light emitted from a light emitting section to the head of a fetus and receives transmitted or reflected light at a light receiving section. A pulse oximeter probe for detecting pulsation of blood in blood vessels of the skin of the head, wherein at least one through hole is provided in a central portion, and the light emitting portions are provided on both sides of the through hole. And a light receiving portion are disposed opposite to each other, and a main body formed in an oval plate shape by an elastic member; a handle portion integrally connected to the main body and formed in a triangular plate shape by an elastic member; And light shielding means for isolating the light emitted from the light receiving unit from the light received by the light receiving unit.

According to a second aspect of the present invention, the light-shielding means is characterized in that the respective optical axes of the light-emitting portion and the light-receiving portion are set in opposite outer directions.

According to a third aspect of the present invention, the light shielding means is a light shielding wall provided on an outer periphery of at least one of the light emitting section and the light receiving section.

According to a fourth aspect of the present invention, the main body and the handle are joined at a predetermined angle.

According to a fifth aspect of the present invention, the cross section of the back surface of the light receiving / emitting surface of the main body is formed in an arc shape protruding outward.

According to a sixth aspect of the present invention, the outer periphery of the distal end of the main body is formed in an arc shape.

According to a seventh aspect of the present invention, at least one step is provided on at least one surface of the main body and the handle.

[0012]

According to the first aspect of the present invention, when the main body is inserted into the uterus while holding the handle of the probe and attached to the head of the fetus, the probe is formed of an elastic member, so that the probe is in close contact with the head. Can be done. At this time, the skin of the head is pressed into the through hole provided in the center of the main body, so that the skin of the head can be stably inserted between the light-emitting portion and the light-receiving portion, and the transmitted light allows blood vessels in the skin to be cut off. The pulsation of the blood inside can be detected stably and efficiently.

In the present invention, the light axis of the light emitting unit and the light receiving unit is directed outward, or a light shielding wall is provided on the outer circumference of the light emitting unit and the light receiving unit, so that the light emitting unit and the light receiving unit are separated from each other. The emitted light can be prevented from directly entering the light receiving section, and stable detection can be performed.

According to the fourth aspect of the present invention, since the main body and the handle are joined at a predetermined angle, they are inserted into the uterus along the curvature of the head, uterus, pelvis, etc. of the fetus, It can be securely adhered to the child's head.

According to the fifth aspect of the present invention, since the rear surface of the main body is provided with a bulge protruding outward,
Under the pressure from the uterus and vagina, the main body can be securely brought into close contact with the fetal head.

According to the sixth aspect of the present invention, since the outer periphery of the tip of the main body is formed in an arc shape, the probe can be inserted safely and smoothly into the fetal head via the vagina.

According to the seventh aspect of the present invention, since the step portion of the convex portion or the concave portion is provided on the surface of the probe, the probe moves in accordance with the movement of the baby head and performs stable detection. be able to.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the probe for a pulse oximeter of the present invention will be described below with reference to the drawings.

In FIG. 1 to FIG. 3, a probe 1 has a main body 2 formed of an elastic member in an elliptical shape, and a handle 3 formed in a triangular shape of an elastic member coaxially and integrally connected to the main body 2. It is composed of The main body 2 and the handle 3 are divided into two in the thickness direction, and the upper body 2a, the upper handle 3a, the lower body 2b, and the lower handle 3b are bonded to each other. Further, the main body 2 and the handle 3 form a predetermined angle in the longitudinal direction, for example, about 120 degrees.

In FIG. 4, the center of the main body 2 is provided with elliptical through holes 4a and 4b having a center line in the longitudinal direction at a position where the through holes 4a and 4b are aligned with each other.
a, 5b are formed. On both sides of the through hole 4a of the upper main body 2a, a pair of left and right long holes 6 and 7 are provided at symmetrical positions, and the long holes 6 and 7 are respectively light emitting elements as light emitting portions formed of transparent covers. A protective cap 8 and a light-receiving element protective cap 9 as a light-receiving section are fitted and mounted. Further, on both sides of the through hole 4b of the lower main body 2b, lead wires 12 and 13 are soldered 16 to a flexible P plate in which the light emitting element 10 and the light receiving element 11 are incorporated, respectively, and are led out through a cord in the handle 3 to the outside. Is done.

The optical axes of the light emitting element 10 and the light receiving element 11 are inclined outward as shown in FIG. 3, so that light emitted from the light emitting element 10 does not directly enter the light receiving element 11. As shown in FIG. 2, a bulge 14 is formed on the bottom surface of the main body 2b so as to protrude outward. Further, a plurality of convex dimples 15 as steps are provided on the surface of the handle 3.

According to this embodiment, the through hole 4 is provided in the center of the main body 2 of the probe 1, the skin of the fetal head is pressed into the through hole 4, and the light emitted from the light emitting element 10 is transmitted through the skin. Since the light is received by the light receiving element 11 and the pulsation of the blood in the blood vessel of the skin is detected by the transmitted light, the oxygen saturation and the like of the blood can be stably and efficiently measured.

At this time, since the optical axes of the light emitting element 10 and the light receiving element 11 are inclined outward, light emitted from the light emitting element 10 can be prevented from directly entering the light receiving section, and stable detection can be performed. it can.

Further, since the main body 2 and the handle 3 are joined at a predetermined angle, the probe 1 can be easily inserted into the uterus along the curvature of the head, uterus, pelvis and the like of the fetus. The main body 2 can be securely brought into close contact with the baby head. Further, since the back surface of the main body 2 is provided with a swelling, the main body 2 can be securely brought into close contact with the baby's head by receiving pressure from the uterus and vagina.

Further, since the outer periphery 5 at the distal end of the main body 2 is formed in an arc shape, the probe 1 can be inserted safely and smoothly into the fetal head via the vagina. Further, since the dimples 15 as protrusions are provided on the surface of the handle 3, the probe 1 can be moved following the movement of the baby head, and stable detection can be performed.

FIG. 5 shows the structure of another embodiment of the present invention.
In this embodiment, instead of shifting the respective optical axes of the light emitting element 10 and the light receiving element 11 shown in FIG. In this case, even if the optical axes of the light emitting element 10 and the light receiving element 11 are made parallel, the same effect as that shown in FIG. 3 can be obtained. A plurality of concave portions may be formed instead of the convex dimples 15 provided on the surface of the handle portion 3, and convex portions or concave portions may be provided on the surface of the main body 2.

[0027]

As described above, according to the first to third aspects of the present invention, the probe is constituted by the main body made of the elastic member and the handle, and the through hole is provided in the center of the main body. A light-emitting part and a light-receiving part are arranged opposite to both sides of the hole, and a light-blocking means is provided between the light-emitting part and the light-receiving part, so that the blood pulsation in the blood vessels of the skin of the fetal head is stabilized. Detection can be performed efficiently, and oxygen saturation of blood can be measured stably.

According to the present invention, the main body and the handle are joined at a predetermined angle, the back surface of the main body is projected in an arc shape, and the outer periphery of the tip of the main body is formed in an arc shape. Since the probe is formed, the probe can be safely and smoothly inserted and arranged in the fetal head, and the main body can be securely brought into close contact with the fetal head.

Further, according to the present invention, since the step is provided on the surface of the probe, the probe can be moved following the movement of the baby head, and stable detection can be performed. it can.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the configuration of one embodiment of a probe for a pulse oximeter of the present invention.

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is an exploded perspective view of FIG. 1;

FIG. 5 is a longitudinal sectional view showing a configuration of a light shielding unit according to another embodiment of the present invention.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 probe 2 main body 3 handle 4 through hole 5 tip outer periphery 8 light emitting element protection cap 9 light receiving element protection cap 10 light emitting element (light emitting section) 11 light receiving element (light receiving section) 14 bulge 15 dimple (step section) 21 light shielding wall (light shielding) means)

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-327657 (JP, A) JP-A-6-47029 (JP, A) JP-A-5-115469 (JP, A) JP-A-4- 226639 (JP, A) JP-A-60-90535 (JP, A) JP-A-5-86304 (JP, U) JP-A-4-501520 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A61B 5/145

Claims (7)

(57) [Claims] 1. A pulse oximeter for irradiating light emitted from a light emitting portion to the head of a fetus and receiving transmitted or reflected light by a light receiving portion to detect pulsation of blood in blood vessels in the skin of the head. At least one through hole is provided in the center of the probe, and the light emitting unit and the light receiving unit are arranged on both sides of the through hole so as to face each other, and are formed in an oval plate shape by an elastic member. A main body, a handle part integrally connected to the main body, formed in a triangular plate shape by an elastic member, and a light shielding unit for isolating light emitted from the light emitting unit and light received by the light receiving unit. Probe for pulse oximeter. 2. The probe for a pulse oximeter according to claim 1, wherein said light-shielding means sets respective optical axes of said light-emitting portion and said light-receiving portion in opposite outward directions. 3. The pulse oximeter probe according to claim 1, wherein the light shielding means is a light shielding wall provided on at least one outer periphery of the light emitting unit and the light receiving unit. 4. The pulse oximeter probe according to claim 1, wherein said main body and said handle are joined at a predetermined angle. 5. The probe for a pulse oximeter according to claim 1, wherein a cross section of a back surface of the light emitting / receiving surface of the main body is formed in an arc shape protruding outward. 6. The pulse oximeter probe according to claim 1, wherein the outer periphery of the tip of the main body is formed in an arc shape. 7. The pulse oximeter probe according to claim 1, wherein at least one step is provided on at least one surface of the main body and the handle.