Blood pressure measuring device having adaptive cuff deflation rate
First Claim
1. A blood pressure measuring device, comprising:
- (a) an inflatable cuff adapted for applying pressure to a patient adjacent a blood vessel;
(b) cuff inflation and deflation means;
(c) sensor means for providing sensor signals during cuff deflation corresponding to the cuff pressure and to the blood flow surges in the blood vessel; and
(d) process control means, the process control means further comprising;
(i) means for controlling the cuff inflation and deflation means so as to cause inflation of the cuff to a first pressure and subsequent deflation of the cuff from the first pressure to a lower second pressure at a preestablished deflation rate, the inflation and subsequent deflation of the cuff comprising a measurement cycle;
(ii) calculation means for processing the sensor signals provided during a given measurement cycle and for determining at least one blood pressure value indicative of the patient'"'"'s blood pressure for that measurement cycle and a pulse rate value indicative of the patient'"'"'s pulse rate for that measurement cycle; and
(iii) parameter setting means for establishing the deflation rate for a given measurement cycle based upon the blood pressure value determined during at least one previous measurement cycle and the pulse rate value determined during at least one prior measurement cycle.
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Accused Products
Abstract
A device is disclosed for making blood pressure measurements using an inflatable cuff (12), wherein the cuff deflation rate is established based upon prior blood pressure measurements. The cuff is adapted for applying pressure to a patient adjacent a blood vessel. the device includes means (14, 16) for inflating and deflating the cuff, a sensor system (60) for providing sensor signals during cuff deflation that correspond to the cuff pressure and to the blood flow surges in the blood vessel, and a process controller (100). The process controller causes inflation of the cuff to a first pressure and subsequent deflation of the cuff from the first pressure to a lower second pressure at a preestablished deflation rate, the inflation and subsequent deflation of the cuff comprising one measurement cycle. The process controller also processes the sensor signals provided during a given measurement cycle in order to determine at least one blood pressure value indicative of the patient'"'"'s blood pressure for that measurement cycle. The process controller includes parameter setting means for establishing the cuff deflation rate for a given measurement cycle based upon the blood pressure value determined during at least one previous measurement cycle. The parameter setting means may establish the deflation rate based upon both blood pressure and pulse rate values determined during previous measurement cycles. The deflation rate may be established so as to provide a predetermined number of blood flow surges between systolic and diastolic pressures in the given measurement cycle.
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Citations
10 Claims
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1. A blood pressure measuring device, comprising:
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(a) an inflatable cuff adapted for applying pressure to a patient adjacent a blood vessel; (b) cuff inflation and deflation means; (c) sensor means for providing sensor signals during cuff deflation corresponding to the cuff pressure and to the blood flow surges in the blood vessel; and (d) process control means, the process control means further comprising; (i) means for controlling the cuff inflation and deflation means so as to cause inflation of the cuff to a first pressure and subsequent deflation of the cuff from the first pressure to a lower second pressure at a preestablished deflation rate, the inflation and subsequent deflation of the cuff comprising a measurement cycle; (ii) calculation means for processing the sensor signals provided during a given measurement cycle and for determining at least one blood pressure value indicative of the patient'"'"'s blood pressure for that measurement cycle and a pulse rate value indicative of the patient'"'"'s pulse rate for that measurement cycle; and (iii) parameter setting means for establishing the deflation rate for a given measurement cycle based upon the blood pressure value determined during at least one previous measurement cycle and the pulse rate value determined during at least one prior measurement cycle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification