SPHYGMOMANOMETER, DEVICE, AND BLOOD PRESSURE MEASUREMENT METHOD

• US 20190328324A1
• Filed: 07/08/2019
• Published: 10/31/2019
• Est. Priority Date: 03/07/2017
• Status: Active Grant

• Current Assignee: Omron Corporation
• Original Assignee: Omron Corporation
• Inventors: MIZUNO, Shinji, NISHIDA, Tomoyuki, TANAKA, Hirokazu, KOHARA, Noboru
• Granted Patent: US 11,266,349 B2
• Time in Patent Office: Days
• CPC Class Codes: A61B 2562/0247 Pressure sensors
• CPC Class Codes: A61B 5/02141 Details of apparatus construction, e.g. pump units or housings therefor, cuff pressurising systems, arrangements of fluid conduits or circuits A61B5/02233, A61B5/0235 take precedence
• CPC Class Codes: A61B 5/02225 using the oscillometric method
• CPC Class Codes: A61B 5/02233 Occluders specially adapted therefor tourniquets A61B17/132
• CPC Class Codes: A61B 5/681 Wristwatch-type devices

Abstract

A sphygmomanometer includes a cuff and a main body. The main body is equipped with a substrate, a pump and a pressure sensor that are attached to one surface of the substrate, and a plate-shaped member opposed to an other surface of the substrate on an opposite side of the one surface of the substrate. The substrate includes a first through-hole and a second through-hole. The other surface of the substrate and an opposing surface of the plate-shaped member opposed to the other surface constitute the planar direction passage extending in a planar direction along the other surface of the substrate. The planar direction passage communicates with a fluid bag of the cuff. The sphygmomanometer further includes a pressurization controller and a blood pressure calculator. The pressurization controller controls pressing the measured site through the planar direction passage. The blood pressure calculator calculates a blood pressure.

Claims

1. A sphygmomanometer comprising:

a cuff to be worn while binding a measured site; and

a main body, wherein

the main body is equipped with a substrate, a pump and a pressure sensor that are attached to one surface of the substrate, and a plate-shaped member opposed to an other surface of the substrate on an opposite side of the one surface of the substrate,

the substrate includes a first through-hole at a portion corresponding to a fluid discharge port of the pump, and a second through-hole at a portion corresponding to a fluid intake port of the pressure sensor,

the other surface of the substrate and an opposing surface of the plate-shaped member opposed to the other surface constitute the planar direction passage extending in a planar direction along the other surface of the substrate,

the planar direction passage communicates with a fluid bag of the cuff, and

the sphygmomanometer further comprises;

a pressurization controller to control pressing the measured site with supplying fluid from the pump to the fluid bag through the first through-hole and the planar direction passage; and

a blood pressure calculator to calculate a blood pressure based on an output of the pressure sensor while the fluid is introduced from the fluid bag to the pressure sensor through the planar direction passage and the second through-hole.

2. The sphygmomanometer according to claim 1, wherein each of the pump and the pressure sensor has a flat outer shape along the one surface of the substrate.

3. The sphygmomanometer according to claim 1, further comprising a spacer plate disposed along between the substrate and the plate-shaped member to keep the substrate and the plate-shaped member in a state in which the substrate and the plate-shaped member are separated from each other in a thickness direction,

wherein both surfaces of the spacer plate are in close contact with the substrate and the plate-shaped member,

the spacer plate includes an inner circumferential wall making a hole penetrating through the spacer plate in the thickness direction, and

the inner circumferential wall collectively surrounds the first through-hole and the second through-hole in the planar direction to form a pattern of the planar direction passage.

4. The sphygmomanometer according to claim 3, wherein a first flow port piercing in the planar direction between the inner circumferential wall of the spacer plate and an outer circumferential wall opposed to the inner circumferential wall is provided, and

the planar direction passage communicates with the fluid bag through the first flow port and a first flexible passage connected to the first flow port.

5. The sphygmomanometer according to claim 4, wherein the first flow port includes a cylindrical lateral pin protruding from the outer circumferential wall of the spacer plate along the planar direction, and

a flexible tube constituting the first flexible passage is fitted and attached to the lateral pin.

6. The sphygmomanometer according to claim 1, wherein a bottomed groove extending along the planar direction is formed on one or both of the other surface of the substrate and the opposing surface of the plate-shaped member,

the bottomed groove communicates in common with the first through-hole and the second through-hole, and portions corresponding to a surrounding of the bottomed groove in the other surface of the substrate and the opposing surface of the plate-shaped member are in close contact with each other, whereby the bottomed groove constitutes the planar direction passage.

7. The sphygmomanometer according to claim 6, wherein a second flow port piercing through the plate-shaped member in the thickness direction is provided in the plate-shaped member, and

the planar direction passage communicates with the fluid bag through the second flow port and a second flexible passage connected to the second flow port.

8. The sphygmomanometer according to claim 7, wherein a recess is provided on a back surface on an opposite side of the opposing surface of the plate-shaped member, a short cylindrical nipple constituting the second flow port is formed in the recess,

the second flexible passage is formed into a bag shape by bringing circumferential edges of two elongated sheets into close contact with each other,

the second flexible passage includes a fluid-flowable short cylindrical portion formed by piercing through an opposing sheet on a side opposed to the nipple in the two sheets in the thickness direction, and

the short cylindrical portion is fitted and attached to the nipple.

9. The sphygmomanometer according to claim 7, wherein a back surface on the opposite side of the opposing surface of the plate-shaped member is formed flat while including a first opening constituting the second flow port,

the second flexible passage is formed into a bag shape by bringing the circumferential edges of two elongated sheets into close contact with each other,

the second flexible passage includes a second opening formed by piercing through an opposing sheet on the side opposed to the opposing surface of the plate-shaped member in the two sheets in the thickness direction, and

the opposing sheet is in close contact with the back surface of the plate-shaped member while the second opening overlaps and communicates with the first opening.

10. The sphygmomanometer according to claim 6, wherein the substrate and the plate-shaped member are made of an integral member in which a material and a composition are spatially continuous while including the bottomed groove.

11. The sphygmomanometer according to claim 1, wherein the plate-shaped member is constructed with a back lid constituting a back surface of the main body.

12. The sphygmomanometer according to claim 11, wherein a third flow port piercing through a circumferential edge of the back lid in the planar direction is provided at the circumferential edge, and

the planar direction passage communicates with the fluid bag through the third flow port and a third flexible flow passage connected to the third flow port.

13. The sphygmomanometer according to claim 12, wherein the third flow port includes a cylindrical lateral pin protruding outward from the back lid along the planar direction, and

a flexible tube constituting the third flexible passage is fitted and attached to the lateral pin.

14. The sphygmomanometer according to claim 1, wherein

the fluid intake port is provided in an abutting surface of the pressure sensor while the fluid discharge port is provided in an abutting surface of the pump abutting on the one surface of the substrate, and

a sealing unit that fluid-tightly attaches the pump and the pressure sensor to the one surface of the substrate is provided between the one surface of the substrate and the abutting surface around the fluid discharge port of the pump and the abutting surface around the fluid intake port of the pressure sensor.

15. The sphygmomanometer according to claim 1, wherein the plate-shaped member includes a layer made of stainless steel or another metal.

16. The sphygmomanometer according to claim 1, wherein the cuff includes:

a belt that extends from the main body and is worn while binding the measured site; and

cuff structure having a belt-shape and being disposed opposite to an inner circumferential surface of the belt, one end of the cuff structure being attached to the main body, and

the cuff structure includes;

pressing cuff having a bag-shape, extending along a longitudinal direction of the cuff structure, and being one of the fluid bags, such that the pressing cuff receives supply of a pressurization fluid to press the measured site;

a sensing cuff having a bag-shape to store a pressure transmitting fluid, being disposed along an inner circumferential surface of the pressing cuff, extending in the longitudinal direction so as to cross an artery passage portion of the measured site, and being one of the fluid bags; and

a backboard interposed between the pressing cuff and the sensing cuff and extending along the longitudinal direction to transmit pressing force from the pressing cuff to the sensing cuff.

17. A device comprising:

a cuff to be worn while binding a measured site; and

a main body including a blood pressure measurement element, wherein

the main body is equipped with a substrate, a pump and a pressure sensor that are attached to one surface of the substrate as the blood pressure measurement element, and a plate-shaped member opposed to the other surface of the substrate on an opposite side of the one surface of the substrate,

the substrate includes the first through-hole at a portion corresponding to a fluid discharge port of the pump, and the second through-hole at a portion corresponding to a fluid intake port of the pressure sensor,

the other surface of the substrate and an opposing surface of the plate-shaped member opposed to the other surface constitute the planar direction passage extending in a planar direction along the other surface of the substrate,

the planar direction passage communicates with a fluid bag of the cuff, and the device further comprises;

a pressurization controller to control pressing the measured site with supplying fluid from the pump to the fluid bag through the first through-hole and the planar direction passage; and

a blood pressure calculator to calculate a blood pressure based on an output of the pressure sensor while the fluid is introduced from the fluid bag to the pressure sensor through the planar direction passage and the second through-hole.

18. A blood pressure measurement method for measuring a blood pressure of a measured site using a sphygmomanometer including a cuff that is worn while binding the measured site and a main body which is equipped with a substrate, a pump and a pressure sensor that are attached to one surface of the substrate, and a plate-shaped member opposed to an other surface of the substrate on an opposite side of the one surface of the substrate, the substrate including a first through-hole at a portion corresponding to a fluid discharge port of the pump and a second through-hole at a portion corresponding to a fluid intake port of the pressure sensor, the other surface of the substrate and an opposing surface of the plate-shaped member opposed to the other surface constituting a planar direction passage extending in a planar direction along the other surface of the substrate, and the planar direction passage communicating with a fluid bag of the cuff, the blood pressure measurement method comprising:

while the cuff is worn on the measured site,

controlling pressing the measured site with supplying fluid from the pump to the fluid bag through the first through-hole and the planar direction passage; and

calculating a blood pressure based on an output of the pressure sensor while the fluid is introduced from the fluid bag to the pressure sensor through the planar direction passage and the second through-hole.