Stethoscope with pulse rate display
First Claim
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1. An apparatus for rapid and precise external measurement of the pulse rate per unit time comprising:
- a diaphragm with supporting annulus connected to a housing coupled to flexible tubing connected to ear pieces for the auscultation of physiologic functions;
a transducer for providing an electrical signal in response to sounds or pulses including Korotkoff sounds generated during the process of blood pressure measurement by the use of a sphygmomanometer;
said transducer coupled to said housing or diaphragm in such a manner that said sounds or pulses produce electrical signals in response to said sounds or pulses;
computing means by which said electrical signals being generated are processed to generate a pulse rate per unit time;
means by which said signals are amplified;
means for displaying said pulse rate;
an electrical switch allowing the observer to allow said electrical signal to be processed to generate said pulse rate whereby said sounds or pulses are most prominent;
means by which an abnormal irregular pulse rate be processed in a differing manner thus causing said electrical signal to set off an alarm to alert the observer to the presence of the abnormal irregular pulse rate.
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Abstract
A miniaturized electronic stethoscope designed to be used in conjunction with a standard sphygmomanometer in the measurement of blood pressure and pulse rate simultaneously in which a transducer converts the Korotkoff sounds into electrical signals. The electrical signals are amplified and fed to a counter in which the detected pulse rate per unit time is calculated and then the result is displayed as a digital pulse rate.
42 Citations
11 Claims
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1. An apparatus for rapid and precise external measurement of the pulse rate per unit time comprising:
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a diaphragm with supporting annulus connected to a housing coupled to flexible tubing connected to ear pieces for the auscultation of physiologic functions; a transducer for providing an electrical signal in response to sounds or pulses including Korotkoff sounds generated during the process of blood pressure measurement by the use of a sphygmomanometer; said transducer coupled to said housing or diaphragm in such a manner that said sounds or pulses produce electrical signals in response to said sounds or pulses; computing means by which said electrical signals being generated are processed to generate a pulse rate per unit time; means by which said signals are amplified; means for displaying said pulse rate; an electrical switch allowing the observer to allow said electrical signal to be processed to generate said pulse rate whereby said sounds or pulses are most prominent; means by which an abnormal irregular pulse rate be processed in a differing manner thus causing said electrical signal to set off an alarm to alert the observer to the presence of the abnormal irregular pulse rate. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An electronic stethoscope comprising:
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a housing for placement of a flexible membrane stretched across a concavity; a ring to affix said membrane to said housing; pliable tubing of certain length secured to said housing; a microphone for converting sounds including Korotkoff sounds into electrical signals; means of coupling said membrane to said microphone; means by which amplitude levels of said signals are compared to a predetermined threshold amplitude and any said signals above said threshold be allowed to pass; means by which said signals are elongated in duration; means by which said signals are processed to generate a pulse rate per unit time; means for providing a visual display of said pulse rate; means by which said signals are amplified; means by which an irregular pulse rate is processed in such a manner that an alarm circuit is triggered to notify the observer of such an abnormality. - View Dependent Claims (9, 10, 11)
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Specification