Blood pressure measuring system
First Claim
1. A blood pressure measuring system comprising:
- an occluding cuff adapted in use to be attached to a selected portion of a subject;
pressurizing means for providing an occluding pressure of said cuff;
pressure bleeding means for gradually decreasing said occluding pressure;
a pressure sensor for sensing an instantaneous cuff pressure measurement and providing an electrical signal indicative thereof;
pressure data separating means for separating from said electrical signal an arterial pulse component superimposed on a net cuff pressure during a pressure bleeding period of gradually decreasing said occluding pressure so as to separately extract said arterial pulse component and said net cuff pressure;
blood pressure determining means for determining systolic and diastolic blood pressures in accordance with said net cuff pressure and said arterial pulse component provided from said pressure data separating means; and
display means for displaying the respective systolic and diastolic blood pressures;
said pressure data separating means including a waveform analyzing means for determining a waveform value of each arterial pulse by the use of pulse width and pulse height of said arterial pulse;
said blood pressure determining means including a characteristic value detecting section detecting a characteristic value from a time series of said waveform values and including a blood pressure deriving section for deriving said systolic and diastolic blood pressures in accordance with said net cuff pressure corresponding to said characteristic value.
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Accused Products
Abstract
By a pressure data separating device 24, a net cuff pressure and an arterial pulse component are separately extracted from a cuff pressure of an occluding cuff which is an electrical signal provided from an A/D converter 23. A waveform value indicative of a waveform of each arterial pulse is computed by an arterial pulse deriving section 24a. An arithmetic operation device 26 is capable of detecting a characteristic value from a time series of the waveform values and determining systolic and diastolic blood pressures of a subject in accordance with a net cuff pressure corresponding to the characteristic value. In the present invention, since particular times associated with the systolic and diastolic blood pressures are derived by an analysis of the waveform of each arterial pulse, the blood pressures can be accurately determined while preventing an error in measurement caused by individual difference of the subject.
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Citations
21 Claims
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1. A blood pressure measuring system comprising:
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an occluding cuff adapted in use to be attached to a selected portion of a subject; pressurizing means for providing an occluding pressure of said cuff; pressure bleeding means for gradually decreasing said occluding pressure; a pressure sensor for sensing an instantaneous cuff pressure measurement and providing an electrical signal indicative thereof; pressure data separating means for separating from said electrical signal an arterial pulse component superimposed on a net cuff pressure during a pressure bleeding period of gradually decreasing said occluding pressure so as to separately extract said arterial pulse component and said net cuff pressure; blood pressure determining means for determining systolic and diastolic blood pressures in accordance with said net cuff pressure and said arterial pulse component provided from said pressure data separating means; and display means for displaying the respective systolic and diastolic blood pressures; said pressure data separating means including a waveform analyzing means for determining a waveform value of each arterial pulse by the use of pulse width and pulse height of said arterial pulse; said blood pressure determining means including a characteristic value detecting section detecting a characteristic value from a time series of said waveform values and including a blood pressure deriving section for deriving said systolic and diastolic blood pressures in accordance with said net cuff pressure corresponding to said characteristic value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification