Blood pressure measuring cuffs and a blood pressure measuring device

• US 8,147,418 B2
• Filed: 09/28/2006
• Issued: 04/03/2012
• Est. Priority Date: 10/07/2005
• Status: Active Grant

• Current Assignee: Terumo Kabushiki Kaisha
• Original Assignee: Terumo Kabushiki Kaisha
• Inventors: Kondo, Akira, Oonishi, Shuichi, Nakanishi, Masaru, Watanabe, Takashi, Ozawa, Hitoshi
• Primary Examiner(s): Marmor, II, Charles A
• Assistant Examiner(s): Reddy, Sunita
• Application Number:
  US12/083,060
• Publication Number:
  US 20090264774A1
• Time in Patent Office: 2,014 Days
• Field of Search: 600481-507, 600/309, 600/310
• US Class Current: 600/499
• CPC Class Codes: A61B 5/02241 of small dimensions, e.g. adapted to fingers
• CPC Class Codes: A61B 5/6815 Ear
• CPC Class Codes: A61B 5/6838 Clamps or clips

Abstract

The present invention enables making uniform contact with the tragus using inner and outer cuffs, each of said inner and outer cuffs being comprised of a cuff member 40 connected to a duct 4 and a cuff bladder 22 having a body 27 which is fixed onto said cuff member in an air-tight manner and can expand and contract, comprised in such manner in order to carry out accurate blood pressure measurement at any one given point in time without being affected by the pinch width of the tragus and depth to the tragus even with repeated mounting and removal from the ear auricle, and also comprised such that a lid 23 of said cuff bladder forms a pressing surface 25 in a shape of a protrusion.

Claims

1. Blood pressure measuring cuffs which measures blood pressure using an inner cuff which is adapted to be inserted in to the acoustic canal and an outer cuff which is adapted to be placed on the outer surface of the tragus,

wherein said inner cuff and outer cuff are comprised of:

a cuff member connected to a duct, and

a cuff bladder fixed onto said cuff member in an air-tight manner and has a body which can expand and contract,

wherein a lid of said cuff bladder has a pressing surface formed in a shape of either a protrusion or a collapsed protrusion, and

wherein said lid is circular, the diameter of said cuff bladder is within a range of 5 to 10 mm, the diameter of said pressing surface is within a range of 3 to 6 mm, the thickness of said pressing surface is within a range of 0.4 to 1 mm, and the thickness of said body is within a range of 0.1 to 0.8 mm.

2. Blood pressure measuring cuffs according to claim 1 characterized in that, said cuff bladder is integrally molded from an elastic material including silicon rubber, natural rubber, and predetermined synthetic resin materials having a Shore hardness value of 30 to 60.

3. Blood pressure measuring cuffs according to claim 1 characterized in that,

an optical means comprised of a light-emitting element and a light receiving element is installed inside said cuff(s) which capture signals from absorption and reflection of light caused by blood flowing through blood vessels,

and a hole is drilled on said pressing surface after forming said cuff bladder from a light shielding material, and into said hole a light permeable layer is inserted and is integrally formed by vulcanization as a single piece light shielding layer, excluding the designated area of said pressing surface of said inner cuff inserted with the light permeable layer.

4. Blood pressure measuring cuffs according to claim 1 characterized in that,

a hole is drilled on said pressing surface after forming said cuff bladder from a light shielding material, and into said hole a light permeable layer is inserted and is integrally formed by vulcanization as a single piece light shielding layer, excluding the designated area of said pressing surface of said inner cuff inserted with the light permeable layer,

and at the same time, said light permeable layer has a shape of a circle, an ellipse or an oval, and is formed concentrically or with its center off set.

5. Blood pressure measuring cuffs which measures blood pressure using an inner cuff which is adapted to be inserted in to the acoustic canal and an outer cuff which is adapted to be placed on the outer surface of the tragus,

wherein said inner cuff and outer cuff are comprised of:

a cuff member connected to a duct, and

a cuff bladder fixed onto said cuff member in an air-tight manner and has a body which can expand and contract, and

wherein a lid of said cuff bladder has a pressing surface formed in a shape of either a protrusion or a collapsed protrusion, and

wherein said lid is elliptical or oval, the major axis is within a range of 5 to 15 mm, the minor axis is within a range of 4 to 10 mm, the thickness of said pressing surface is within a range of 0.4 to 1 mm, and the thickness of said body is within a range of 0.1 to 0.8 mm.

6. A blood pressure measuring device, comprising:

an inner cuff to be inserted into the acoustic canal and an outer cuff to be placed on the outer surface of the tragus;

a holding means for holding said inner cuff and said outer cuff;

a pulse wave detection means installed in at least one of said inner cuff and said outer cuff, for detecting pulse wave signals from blood flowing through blood vessels;

a pressure adjusting means, for applying and decreasing pressure using a fluid body including air to said inner cuff and outer cuff that are adapted to pinch the tragus;

ducts for supplying a fluid body connecting said inner cuff and said outer cuff to said pressure adjusting means;

a pressure detecting means for detecting pressures of said inner cuff and said outer cuff;

a blood pressure measurement controlling means for measuring blood pressure from said pulse wave signals, and

wiring which connects said pulse wave detection means and said blood pressure measurement controlling means,

wherein said inner cuff and outer cuff are comprised of;

a cuff member connected with said ducts, and

a cuff bladder fixed onto said cuff member in an air-tight manner and has a lid and a body which can expand and shrink, and forms a pressing surface configured as a protrusion on the lid of said cuff bladder, and

wherein the lid of said cuff bladder is circular, the diameter of said cuff bladder is within a range of 5 to 10 mm, the diameter of said pressing surface is within a range of 3 to 6 mm, the thickness of said pressing surface is within a range of 0.4 to 1 mm, and the thickness of said body is within a range of 0.1 to 0.8 mm.

7. A blood pressure measuring device, comprising:

an inner cuff to be inserted into the acoustic canal and an outer cuff to be placed on the outer surface of the tragus;

a holding means for holding said inner cuff and said outer cuff;

a pulse wave detection means installed in at least one of said inner cuff and said outer cuff, for detecting pulse wave signals from blood flowing through blood vessels;

a pressure adjusting means, for applying and decreasing pressure using a fluid body including air to said inner cuff and outer cuff that are adapted to pinch the tragus;

ducts for supplying a fluid body connecting said inner cuff and said outer cuff to said pressure adjusting means;

a pressure detecting means for detecting pressures of said inner cuff and said outer cuff;

a blood pressure measurement controlling means for measuring blood pressure from said pulse wave signals, and

wiring which connects said pulse wave detection means and said blood pressure measurement controlling means,

wherein said inner cuff and outer cuff are comprised of;

a cuff member connected with said ducts, and

a cuff bladder fixed onto said cuff member in an air-tight manner and has a lid and a body which can expand and shrink, and forms a pressing surface configured as a protrusion on the lid of said cuff bladder, and

wherein the lid of said cuff bladder is elliptical or oval, the major axis is within a range of 5 to 15 mm, the minor axis is within a range of 4 to 10 mm, the thickness of said pressing surface is within a range of 0.4 to 1 mm, and the thickness of said body is within a range of 0.1 to 0.8 mm.