Blood pressure monitor
First Claim
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1. A blood pressure measuring apparatus comprising:
- a manifold pressurizable with a compressed gas;
pressurization means connected to the manifold to apply compressed gas to the manifold;
linear pressure decay means connected to the manifold;
blood flow occluder means connected to the manifold and configured to block arterial blood flow of the user;
gas connection means, which is the only means interconnecting the occluder means and the manifold, and which transmits sound and gas pressure pulses from the occluder means to the manifold and interchanges gas flow and pressure between the manifold and the occluder means;
pressure transducer means connected to the manifold and yielding an electrical signal varying in amplitude with the static pressure in the manifold;
pulse transducer means connected to the manifold and yielding an electrical signal varying in amplitude and frequency with sound and gas pressure pulses in the manifold;
electronic circuit means, connected to the pressure transducer means and the pulse transducer means, by non-flexible connections, measuring the systolic and diastolic pressure points by determining the pressure values, as measured by the pressure transducer means, at which the sound and gas pressure pulses derived from the pulse transducer means change characteristics; and
display means connected to the electronic circuit means, and displaying the systolic and diastolic pressures measured by the electronic circuit means.
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Abstract
A digital readout electronic blood pressure and pulse rate monitor. A finger cuff occluder is pressurized by a single stroke plunger and an automatic vent means provides linear pressure decay while a pressure transducer measures the pressure and converts it to an electronic signal. A sound transducer senses sound transmitted from the cuff through the pressure tube, and an electronic system distinguishes the various characteristics of the sound to measure the systolic and diastolic pressures. The electronic system also measures the pulse rate. All three readings are digitally displayed only if several predetermined conditions indicating a proper reading are fulfilled.
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Citations
22 Claims
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1. A blood pressure measuring apparatus comprising:
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a manifold pressurizable with a compressed gas; pressurization means connected to the manifold to apply compressed gas to the manifold; linear pressure decay means connected to the manifold; blood flow occluder means connected to the manifold and configured to block arterial blood flow of the user; gas connection means, which is the only means interconnecting the occluder means and the manifold, and which transmits sound and gas pressure pulses from the occluder means to the manifold and interchanges gas flow and pressure between the manifold and the occluder means; pressure transducer means connected to the manifold and yielding an electrical signal varying in amplitude with the static pressure in the manifold; pulse transducer means connected to the manifold and yielding an electrical signal varying in amplitude and frequency with sound and gas pressure pulses in the manifold; electronic circuit means, connected to the pressure transducer means and the pulse transducer means, by non-flexible connections, measuring the systolic and diastolic pressure points by determining the pressure values, as measured by the pressure transducer means, at which the sound and gas pressure pulses derived from the pulse transducer means change characteristics; and display means connected to the electronic circuit means, and displaying the systolic and diastolic pressures measured by the electronic circuit means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification