Pocket-size electronic cuffless blood pressure and pulse rate calculator with optional temperature indicator, timer and memory
First Claim
1. A cuffless electronic blood pressure device including a non-circumferentially engaging pressure applying means, transducer means responsive to the compression degree of the said pressure applying means, acoustical sensor means coupled to said pressure applying means for detecting pulse rate or heart rate sounds and producing an electrical signal in response thereto, systolic signal producing means coupled to said acoustical sensor means for producing a signal representing the systolic pressure of the user, diastolic signal producing means coupled to said acoustical sensor means for producing a signal representing the diastolic pressure of the user, the systolic and diastolic signals produced being an analog representation coordinated to the analog representation of the degree of compression and decompression of the subjected tissues by the non-circumferentially engaging pressure applying means, converting means for changing said analog representation of the systolic and diastolic signals to digital visual displays thereby indicating the respective systolic and diastolic pressure of the user.
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Abstract
Several related preferred embodiments pertaining to a non-invasive type of pocket-size electronic cuffless blood pressure and pulse rate calculator with optional temperature indicator, timer and memory are disclosed, for fast, accurate and reliable determination of both systolic and diastolic blood pressure values of the human or animal subject utilizing the "Korotkoff method" of detection; pulse rate being determined independently or in conjunction with the blood pressure measurement; said device utilizing microcomputers and light-emitting display means such as, but not limited to, LED or LCD pressure display gauge representing the equivalence in millimeters of Hg. a range from 0 to 300. This disclosure is characterized by several models of compact construction and modernistic designs with minimal moving mechanical parts and with a preferrably linearly displaceable pressure head applying means for on-the-spot over-the-artery application, coupled with an optimally located acoustical transducer for detecting the "Korotkoff sounds" created during the process of extravascular and occlusion and gradual deocclusion of the subjected pressurized artery; the device has a manually or electronically operable pressure threshold that can be set about 30 millimeters Hg. equivalence or more above the anticipated systolic pressure, and said pressure threshold capable of being entered into the microcomputer'"'"'s memory to effect the automatic triggering of the systolic and diastolic electronic sensing and latching of the desired blood pressure data only after said pressure threshold has been reached.
160 Citations
52 Claims
- 1. A cuffless electronic blood pressure device including a non-circumferentially engaging pressure applying means, transducer means responsive to the compression degree of the said pressure applying means, acoustical sensor means coupled to said pressure applying means for detecting pulse rate or heart rate sounds and producing an electrical signal in response thereto, systolic signal producing means coupled to said acoustical sensor means for producing a signal representing the systolic pressure of the user, diastolic signal producing means coupled to said acoustical sensor means for producing a signal representing the diastolic pressure of the user, the systolic and diastolic signals produced being an analog representation coordinated to the analog representation of the degree of compression and decompression of the subjected tissues by the non-circumferentially engaging pressure applying means, converting means for changing said analog representation of the systolic and diastolic signals to digital visual displays thereby indicating the respective systolic and diastolic pressure of the user.
- 25. A cuffless electronic blood pressure device including a housing member adapted to be hand-held and having a displaceable piston pressure applying means generally axially oriented with respect to said housing and including transducer means responsive to the compression of the said displaceable piston, acoustical sensor means associated with said displaceable piston for detecting pulse rate or heart rate sounds and producing an electric signal in response thereto, systolic signal producing means associated with said acoustical sensor means for producing a signal representing the systolic pressure of the user, and diastolic signal producing means coupled to said acoustical sensor means for producing a signal representing the diastolic pressure of the user, the systolic and diastolic signal produced being an analog representation coordinated to the analog representation of the degrees of the compression and decompression of the subjected tissues by the displaceable piston pressure applying means, and means for converting said analog representation of the systolic and diastolic signals to digital visual displays thereby indicating the respective systolic and diastolic pressure of the user.
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45. A method for electronically measuring the blood pressure and pulse rate of an individual without the use of an arm encircling compression band comprising the steps of:
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(1) Gradually compressing and then gradually decompressing an axially displaceable pressure applying means having a head portion greater than the diameter of the targeted artery, positioning said head applying means approximately at a right angle position against the axis of the said targeted artery to effect a non-invasive method of occluding the subjected vessel causing total blood flow cessation across the compressed said artery and then to effect blood flow resumption with every successive cardiac contraction so as to detect the blood flow turbulence sounds known as the Korotkoff sounds by means of a sensitive acoustical transducer means located therewithin the said pressure applying means and in close proximity to the said arterial vessel for effectively detecting the systolic and the diastolic blood pressure in coordination with the degree of compression by the axially displaced pressure applying means. (2) axially displacing the pressure means to activate a transducer means and acoustical sensor means therewithin, (3) automatically converting the electrical signals from the pressure applying means which correspond to Korotkoff sounds into both analog as well as digital visual display indicating the respective systolic and diastolic pressure of the individual. - View Dependent Claims (46, 47, 48, 49, 50, 51, 52)
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Specification