Pulse oximeter probe

• US 5,551,423 A
• Filed: 06/07/1995
• Issued: 09/03/1996
• Est. Priority Date: 01/26/1993
• Status: Expired due to Fees

• Current Assignee: Nihon Kohden Corporation
• Original Assignee: Nihon Kohden Corporation
• Inventors: Sugiura, Keiichi
• Primary Examiner(s): Sykes, Angela D.
• Assistant Examiner(s): NASSER, ROBERT L
• Application Number:
  US08/487,225
• Time in Patent Office: 454 Days
• Field of Search: 128/633, 128/664-6, 128/41, 356/41
• US Class Current: 600/323
• CPC Class Codes: A61B 5/02427 Details of sensor
• CPC Class Codes: A61B 5/14552 Details of sensors specially adapted therefor
• CPC Class Codes: A61B 5/6816 Ear lobe

Abstract

A pulse oximeter probe includes a measuring member including a light-emitting element and a light receiving element, a pair of holding members for holding the basal part of an earlobe, the measuring member mounted on the holding member, the holding members including compressing portions for holding the basal part of the earlobe, the compressing portions being separated in position from the measuring member.

Claims

1. A pulse oximeter probe comprising:

a first holding member having a first compressing portion;

a second holding member connected to said first holding member and having a second compressing portion, wherein said first and second compressing portions are urged toward each other for holding a part of an ear;

at least one light emitting element mounted on one of said first and second holding members; and

a light receiving element mounted on one of said first and second holding members,

wherein at least one of said light emitting and light receiving elements is mounted on one of said first and second holding members at a position away from the compressing portions so that light which is emitted from said light emitting element travels completely through a portion of the ear which is not compressed by said compressing portions and which is not bordered by ear tissue which is compressed by said compressing portions before reaching said light receiving element, and

wherein said light emitting and light receiving elements cooperate to form a measuring device.

2. A pulse oximeter probe as claimed in claim 1, wherein the light-emitting element and the light receiving element are mounted on the holding members, respectively to face each other.

3. A pulse oximeter probe as claimed in claim 1 wherein said first compressing portion and said second compressing portion are for holding the basal part of an earlobe, and wherein the first holding member forms at an end thereof a bent portion which is adapted to be inserted into the entrance to the auditory meatus, and wherein one of the light-emitting element and the light-receiving element is mounted on the second compressing portion and the other of the light-emitting and light receiving elements is mounted on the bent portion of the first holding member in such manner that the light-emitting element and the light-receiving element are in a face-to-face relationship.

4. A pulse oximeter probe as claimed in claim 3, wherein each of said holding members has a connecting end away from the respective compressing portions, and wherein one of the two holding members is fitted with a connecting shaft at the connecting end and the connecting shaft is inserted slidably into a slot that is formed at the connecting end of the other holding member.

5. A pulse oximeter probe as claimed in claim 1, wherein each of said holding members has a connecting end away from the respective compressing portions, and wherein one of the two holding members is fitted with a connecting shaft at the connecting end and the connecting shaft is inserted slidably into a slot that is formed at the connecting end of the other holding member.

6. A pulse oximeter probe according to claim 1, wherein:

said first holding member is formed of an elastic material in a generally semicircular form,

said light-emitting element and said light-receiving element are provided at opposite ends of said first holding member in a face-to-face relationship; and

said second holding member is fitted rotatably at an end of said first holding member, said second holding member including;

a first projection, in the middle portion thereof, for pressing an upper part of an ear and for holding said holding members in position relative to the ear; and

a second projection formed at a distal end of said second holding means in such a manner that said second projection is engaged with an end of said first holding member opposite the end at which said first and second holding members are rotatably fitted.

7. A pulse oximeter probe as claimed in claim 6, wherein the light emitting element and the light receiving element positioned away from said first projection.