Sphygmomanometer

• US 5,840,037 A
• Filed: 07/22/1997
• Issued: 11/24/1998
• Est. Priority Date: 04/19/1995
• Status: Expired due to Term

• Current Assignee: A&D Company Limited (A&D Holon Holdings Co Ltd)
• Original Assignee: A&D Company Limited (A&D Holon Holdings Co Ltd)
• Inventors: Tochikubo, Osamu, Ishizuka, Shigehiro
• Primary Examiner(s): Nasser, Robert L.
• Application Number:
  US08/793,336
• Time in Patent Office: 490 Days
• Field of Search: 600/479, 600/485, 600/490, 600/493-7, 600/499, 600/500, 606/202
• US Class Current: 600/499
• CPC Class Codes: A61B 5/02233 Occluders specially adapted therefor tourniquets A61B17/132
• CPC Class Codes: A61B 5/02255 the pressure being controlled by plethysmographic signals, e.g. derived from optical sensors

Abstract

The invention relates to a cuff for a sphygmomanometer, which is able to judge the maximum blood pressure and minimum blood pressure at a high accuracy. The cuff 10 comprises a bendably deformable hard curved plate 10a, an outside cloth 10b which surrounds the outer periphery of said curved plate 10a, an inside cloth 10c sewed to the outside cloth 10b so that the same surrounds the inner periphery of said curved plate 10a, an air bag 10d secured inside the inside cloth 10c, and an engaging fastener 10e sewed to the outer periphery of the outside cloth 10b. The air bag 10d is composed of a transparent bag member 10g in which reinforcing fabric 10f is incorporated in a latticed state. Each optical range sensor 12 is composed of a photocoupler 12a fixed at the outside of the bag member 10g and a reflection plate 12b fixed at the inside of the bag member 10g so as to be opposite to the photocoupler 12a. The photocoupler 12a has a light emitting diode and a phototransistor, whereby light emitted by the light emitting diode is reflected by the reflection plate 12b and is made incident into the phototransistor, and the output of the phototransistor may change in accordance with the distance between the photocoupler 12a and the reflection plate 12b.

Claims

1. A cuff for a sphygmomanometer adapted for attachment to an appointed part of a patient and adapted for compression of an artery, comprising a hard curved plate retained between an inside cloth and outside cloth sewed to each other, an engaging fastener fixed on an outer surface of said outside cloth, an air bag fixed at an inner circumferential side of said inside cloth and having an inside and an outside, and a photoelectric sensor installed between the inside and outside of said air bag, wherein said photoelectric sensor includes a reflection plate secured at the inside part of said air bag and a light receiving element and a light emitting element which are provided at the outside part of said air bag.

2. A cuff for a sphygmomanometer as set forth in claim 1, wherein said photoelectric sensor includes a light receiving element and light emitting element, one of which is provided at the inside part of said air bag, and the other of which is provided at the outside part of said air bag.

3. A cuff for a sphygmomanometer as set forth in claim 1, wherein said air bag includes a transparent bag member and a latticed reinforcing fabric integrally incorporated in the air bag.

4. A cuff for a sphygmomanometer adapted for attachment to an appointed part of a patient and adapted for compression of an artery, comprising a hard curved plate retained between an inside cloth and outside cloth sewed to each other, an engaging fastener fixed on an outer surface of said outside cloth, an air bag fixed at an inner circumferential side of said inside cloth and having an inside and an outside, and a photoelectric sensor installed between the inside and outside of said air bag

wherein said photoelectric sensor includes first and second elements installed between the inside and the outside of said air bag, respectively, wherein one of said elements is a light emitting element, and the other of said elements is a reflection plate or a light receiving element.

5. A cuff for a sphygmomanometer adapted for attachment to an appointed part of a patient and adapted for compression of an artery, comprising a hard curved plate retained between an inside cloth and outside cloth sewed to each other, an engaging fastener fixed on an outer surface of said outside cloth, an air bag fixed at an inner circumferential side of said inside cloth and having an inside and an outside, and a photoelectric sensor installed between the inside and outside of said air bag, wherein said air bag includes a transparent bag member and a latticed reinforcing fabric integrally incorporated in the air bag.