Blood vessel pressing cuff, blood pressure measuring apparatus including the blood vessel pressing cuff, and blood pressure measuring method using the blood pressure measuring apparatus
First Claim
1. A blood vessel pressing cuff comprising:
- a strap adapted to surround a body part;
a first actuator disposed on the strap, and comprising a first shape memory alloy which changes to a first shape memorized in advance, at a temperature equal to or higher than a first temperature; and
a second actuator disposed on the strap and separated from the first actuator along a length of the strap, and comprising a second shape memory alloy which changes to a second shape memorized in advance, at a temperature equal to or higher than a second temperature which is different from the first temperature, wherein the first actuator is adapted to apply an increased pressure at a target part of the body part when the first shape memory alloy changes to the first shape, and wherein the first actuator is adapted to apply a decreased pressure to the target part of the body part due to the change of the second shape memory alloy to the second shape.
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Accused Products
Abstract
A blood vessel pressing cuff includes a strap surrounding a body part, a first actuator disposed on the strap and including a first shape memory alloy which changes to a first shape memorized in advance, at a temperature equal to or higher than a first temperature, and a second actuator disposed on the strap and including a second shape memory alloy which changes to a second shape memorized in advance, at a temperature equal to or higher than a second temperature that is different from the first temperature. If the first shape memory alloy changes to the first shape, pressure applied to the body part surrounded by the strap is increased. Even when the first shape memory alloy changes to the first shape, if the second shape memory alloy changes to the second shape, the pressure applied to the body part surrounded by the strap is reduced.
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Citations
15 Claims
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1. A blood vessel pressing cuff comprising:
- a strap adapted to surround a body part;
a first actuator disposed on the strap, and comprising a first shape memory alloy which changes to a first shape memorized in advance, at a temperature equal to or higher than a first temperature; and
a second actuator disposed on the strap and separated from the first actuator along a length of the strap, and comprising a second shape memory alloy which changes to a second shape memorized in advance, at a temperature equal to or higher than a second temperature which is different from the first temperature, wherein the first actuator is adapted to apply an increased pressure at a target part of the body part when the first shape memory alloy changes to the first shape, and wherein the first actuator is adapted to apply a decreased pressure to the target part of the body part due to the change of the second shape memory alloy to the second shape. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- a strap adapted to surround a body part;
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14. A blood pressure measuring method comprising:
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surrounding a body part with a strap of a blood pressure measuring apparatus, the blood pressure measuring apparatus comprising; the strap, a first actuator comprising a first shape memory alloy, and a second actuator comprising a second shape memory alloy, the second actuator separated from the first actuator along a length of the strap; the first actuator applying pressure to a target part of the body part, by changing a temperature of the first actuator to a temperature equal to or higher than a first temperature, which changes the first shape memory alloy to a first shape memorized in advance; calculating blood pressure based on a sphygmus wave and a pressure of a blood vessel, which are sensed while pressure is applied to the target part of the body part; and releasing the pressure applied by the first actuator to the target part of the body part, due to changing a temperature of the second actuator to a temperature equal to or higher than a second temperature which is different from the first temperature, which changes the second shape memory alloy to a second shape memorized in advance. - View Dependent Claims (15)
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Specification