# US 10,765,330 B2 · Probe for pulse photometry

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- Number: US 10,765,330 B2
- Document ID: US10765330B2
- Status: Granted
- Kind: B2
- Application number: 15/432,427
- Filed: 2017-02-14
- Published: 2017-08-31
- Granted: 2020-09-08
- Earliest claimed: 2016-02-29
- Assignees: Nihon Kohden Corporation
- Applicants: Nihon Kohden Corporation
- Inventors: Masahiro Takeuchi
- Web page: https://patentgrep.com/patent/US10765330B2

## CPC

- A61B 5/02427: {Details of sensor}
- A61B 5/14551: {for measuring blood gases}
- A61B 5/14552: {Details of sensors specially adapted therefor}
- A61B 5/6826: {Finger}
- A61B 5/6844: {Monitoring or controlling distance between sensor and tissue}
- A61B 5/6832: {using adhesives (conductive adhesive for bioelectric electrodes A61B5/259)}
- A61B 2562/0238: Optical sensor arrangements for performing transmission measurements on body tissue
- A61B 2562/146: for optical coupling
- A61B 2562/185: Optical shielding, e.g. baffles
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

A pulse photometry probe includes a holding member that includes a contact face which is to be in contact with living tissue of a patient, an emitter that is placed in the holding member, a detector that is placed in the holding member and detects light emitted from the emitter, and, a spacer that is disposed between the contact face and the emitter and has an opening, wherein an air layer defined by the opening is disposed between an emitting face of the emitter and the contact face.

## Claims

### Claim 1

A pulse photometry probe comprising:
a holding member that includes a contact face which is to be in contact with living tissue of a patient and a lower sheet in which a through hole is formed;
an emitter that is placed in the holding member;
a detector that is placed in the holding member and detects light emitted from the emitter;
a spacer that is disposed between the contact face and the emitter and has an opening;
a transparent member that is disposed between the contact face and the emitter, covers the opening of the spacer, and is harder than the holding member; and
a heat radiation layer that is disposed between the spacer and the lower sheet and has a thermal conductivity that is higher than a thermal conductivity of the spacer,
wherein an air layer defined by the opening is disposed between an emitting face of the emitter and the contact face, and
wherein the transparent member, emitter, detector, and opening of the spacer are aligned along a linear direction.

### Claim 2 (depends on 1)

The probe according to claim 1 wherein the heat radiation layer is disposed between the spacer and the contact face.

### Claim 3 (depends on 2)

The probe according to claim 2, wherein the heat radiation layer is formed by a metal material or a carbon material.

### Claim 4 (depends on 1)

The probe according to claim 1, wherein the spacer is formed by a metal material.

### Claim 5 (depends on 1)

The probe according to claim 1, wherein the holding member forms an accommodation space, and
the emitter and the detector are accommodated in the accommodation space.

### Claim 6 (depends on 1)

The probe according to claim 1, wherein the air layer is surrounded by the spacer, the emitting face and the transparent member.

### Claim 7 (depends on 1)

The probe according to claim 1, wherein the lower sheet is disposed between the contact face and the spacer.

### Claim 8 (depends on 7)

The probe according to claim 7, wherein a lower surface of the lower sheet and a lower surface of the transparent member form a continuous surface.

### Claim 9 (depends on 1)

The probe according to claim 1, wherein:
the holding member includes an upper sheet,
the emitter and detector are place between the upper sheet and lower sheet of the holding member,
the spacer is disposed in the holding member between the lower sheet and the emitter, and
the air layer is disposed between the emitter and the transparent member.

### Claim 10 (depends on 1)

The probe according to claim 1, wherein the transparent member, emitter, and opening of the spacer are aligned along a linear direction, and the transparent member has a rectangular cross-section along a plane parallel to the linear direction.

### Claim 11 (depends on 1)

The probe according to claim 1, wherein the contact face covers the air layer.

### Claim 12

A pulse photometry probe comprising:
a holding member that includes a contact face which is to be in contact with a finger of a patient and a lower sheet in which a through hole is formed;
an emitter that is placed in the holding member;
a detector that is placed in the holding member and detects light emitted from the emitter;
a spacer that is disposed between the contact face and the emitter and has an opening;
a transparent member that is disposed between the contact face and the emitter, covers the opening of the spacer, and is harder than the holding member; and
a heat radiation layer that is disposed between the spacer and the lower sheet and has a thermal conductivity that is higher than a thermal conductivity of the spacer,
wherein an air layer defined by the opening is disposed between an emitting face of the emitter and the contact face, and
wherein the air layer disperses most of the heat from the emitter to the spacer thereby preventing low temperature burns in the finger.