BLOOD PRESSURE MONITOR AND METHOD FOR CALCULATING BLOOD PRESSURE THEREOF
First Claim
1. A method for calculating blood pressure comprising the steps of:
- arranging a cuff at a body to be detected, inflating the cuff,deflating the cuff and simultaneously sensing pressure of the cuff to generate a plurality of analog pressure sensing signals,processing the analog pressure sensing signals to generate a plurality of digital pressure sensing signals and then converting the digital pressure sensing signals to a plurality of blood pressure values, andcalculating a slope of each digital pressure sensing signal and finding a pressure value of the digital pressure sensing signal corresponding to a maximum slope to be an average blood pressure, andcalculating a second derivative of each digital pressure sensing signal for finding a pressure value of the digital pressure sensing signal corresponding to a largest maximum value of the second derivative to be a systolic pressure and also finding a pressure value of the digital pressure sensing signal corresponding to a smallest minimum value of the second derivative to be a diastolic pressure.
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Accused Products
Abstract
A blood pressure monitor and a method for calculating blood pressure thereof are revealed. The blood pressure monitor includes a cuff, an air pump, an air escape valve, a pressure sensor, a processing circuit, and an arithmetic circuit. The cuff is arranged a a body to be detected while and the air pump inflates the cuff and the air escape valve is for releasing air from the cuff. The pressure sensor is disposed on the cuff for detecting cuff pressure to generate analog pressures sensing signals. The processing circuit processes the analog pressure sensing signals and generates digital pressure sensing signals. A slope of each digital pressure sensing signal is calculated by the arithmetic circuit. A pressure value of the digital pressure sensing signal corresponding to a maximum slope is an average blood pressure. Then find a second derivative of each digital pressure sensing signal. A pressure value of the digital pressure sensing signal corresponding to a largest maximum value of the second derivative is systolic pressure while a pressure value of the digital pressure sensing signal corresponding to a smallest minimum value of the second derivative is diastolic pressure.
24 Citations
25 Claims
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1. A method for calculating blood pressure comprising the steps of:
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arranging a cuff at a body to be detected, inflating the cuff, deflating the cuff and simultaneously sensing pressure of the cuff to generate a plurality of analog pressure sensing signals, processing the analog pressure sensing signals to generate a plurality of digital pressure sensing signals and then converting the digital pressure sensing signals to a plurality of blood pressure values, and calculating a slope of each digital pressure sensing signal and finding a pressure value of the digital pressure sensing signal corresponding to a maximum slope to be an average blood pressure, and calculating a second derivative of each digital pressure sensing signal for finding a pressure value of the digital pressure sensing signal corresponding to a largest maximum value of the second derivative to be a systolic pressure and also finding a pressure value of the digital pressure sensing signal corresponding to a smallest minimum value of the second derivative to be a diastolic pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A blood pressure monitor comprising:
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a cuff disposed on a body to be detected, an air pump connected with the cuff and used for inflation of the cuff, an air escape valve coupled with the air pump and used for releasing air from the cuff, a pressure sensor arranged at the cuff to detect pressure of the cuff while releasing air from the cuff for generating a plurality of analog pressure sensing signals, a processing circuit coupled with the pressure sensor, processing the analog pressure sensing signals and generating a plurality of digital pressure sensing signals that are converted to a plurality of blood pressure values, and an arithmetic circuit that calculates a slope of each digital pressure sensing signal and finds a pressure value of the digital pressure sensing signal corresponding to a maximum slope to be an average blood pressure, also calculates a second derivative of each digital pressure sensing signal for finding a pressure value of the digital pressure sensing signal corresponding to a largest maximum value of the second derivative to be a systolic pressure and also finding a pressure value of the digital pressure sensing signal corresponding to a smallest minimum value of the second derivative to be a diastolic pressure. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification