Method of controlling blood pressure cuff deflation
First Claim
1. A method of operating a non-invasive blood pressure (NIBP) monitor having an inflatable and deflatable pressure cuff positioned on a patient and using a pressure transducer, with the method comprising the steps of:
- inflating the pressure cuff to an initial inflation pressure;
continuously deflating the pressure cuff from the initial inflation pressure;
obtaining a series of oscillation pulses from the pressure transducer as the pressure cuff is deflated from the initial inflation pressure;
comparing the obtained oscillation pulses to predicted pulse estimates;
interrupting the continuous deflation of the pressure cuff when the obtained oscillation pulses vary from the predicted pulse estimates;
deflating the pressure cuff in a sequence of distinct pressure steps after interruption of the continuous deflation;
obtaining oscillation pulses from the pressure transducer during each pressure step; and
calculating the patient'"'"'s blood pressure based on the plurality of obtained oscillation pulses.
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Accused Products
Abstract
A method of operating a non-invasive blood pressure (NIBP) monitor that includes a blood pressure cuff and a pressure transducer. The method initially inflates the blood pressure cuff to a level above systolic pressure and begins to deflate the pressure cuff using a continuous or linear deflation technique. During the linear deflation of the pressure cuff, the oscillation pulses from the pressure transducer are obtained and compared to predicted pulse estimates. If the obtained oscillation pulses vary from the predicted pulse estimates, the linear deflation technique is interrupted and the pressure cuff is then deflated in a sequence of distinct pressure steps. During each pressure step, the oscillation pulses are obtained and the pressure cuff is not deflated to the next pressure step until the oscillation pulses correspond to each other.
15 Citations
14 Claims
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1. A method of operating a non-invasive blood pressure (NIBP) monitor having an inflatable and deflatable pressure cuff positioned on a patient and using a pressure transducer, with the method comprising the steps of:
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inflating the pressure cuff to an initial inflation pressure; continuously deflating the pressure cuff from the initial inflation pressure; obtaining a series of oscillation pulses from the pressure transducer as the pressure cuff is deflated from the initial inflation pressure; comparing the obtained oscillation pulses to predicted pulse estimates; interrupting the continuous deflation of the pressure cuff when the obtained oscillation pulses vary from the predicted pulse estimates; deflating the pressure cuff in a sequence of distinct pressure steps after interruption of the continuous deflation; obtaining oscillation pulses from the pressure transducer during each pressure step; and calculating the patient'"'"'s blood pressure based on the plurality of obtained oscillation pulses. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of operating a non-invasive blood pressure (NIBP) monitor having an inflatable and deflatable pressure cuff positioned on the patient and a pressure transducer operable to detect oscillometric pulses, the method comprising the steps of:
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deflating the pressure cuff from an initial inflation pressure to a final pressure using a continuous deflation technique; obtaining oscillation pulses from the pressure transducer during the continuous deflation of the pressure cuff from the initial inflation pressure; comparing the obtained oscillation pulses to predicted pulse estimates; and terminating the continuous deflation of the pressure cuff and deflating the pressure cuff in a series of pressure steps when the obtained oscillation pulses vary from the predicted pulse estimates. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification