Abstract A heart rate and body temperature measurement system where the temperature is measured by a thermistor placed in intimate contact with the patient which varies in resistance value, the variation being converted to a voltage which is applied to a voltage controlled oscillator forming a pulse train input to a storage register. The register is gated in timed intervals into a digital display utilizing a mode switch and reset switch. The mode switch selects temperature or pulse rate. The pulse rate is determined by transluminating a finger of the patient with a light source such as a bulb and observing coloration changes with a light sensitive device, the signal being applied to an amplifier circuit driving a schmitt trigger, the output being stretched by a monostable multivibrator and the pulses being stored in an integrating amplifier which provides a DC level. The DC level is also applied to the mode switch which is input to the same VCO. The mode switch selects pre-set inputs for the register which again is gated by a timed signal into a digital display. The apparatus described is a portable indicating device.
A physiological indicating system comprising: transducer means for engaging a finger of a patient to form optically created pulse signals and wherein said transducer means includes a lamp means for transilluminating a finger and light responsive means for observing a change in the finger on a heart beat; circuit means for converting the pulse signals into a voltage analogous to the pulse rate, said means comprising an amplifier connected to said transducer means; level responsive circuit means connected to said amplifier for forming a pulse on a pulse of the finger so observed; means for making the pulse so formed uniform in length; means for summing said pulses so said circuit means can form a voltage analogous to the pulse rate; a voltage dependent oscillator connected to said circuit means for forming output pulses at least partly proportional to the voltage level; register means for storing the number of pulses input thereto from said oscillator; pre-set circuit means connected to said register for providing a pre-set number therein serving as a scale factor so that the number of pulses stored in said register is scaled to the measure of interest; timing means which gates said register on for a specifiEd interval; and, digital display means connected to said register means for providing a digital indication.
Claim 2
Dependent Claim
215 words
A physiological indicating system comprising: transducer means for engaging a finger of a patient to form optically created pulse signals and wherein said transducer means includes a lamp means for transilluminating a finger and light responsive means for observing a change in the finger on a heart beat; circuit means for converting the pulse signals into a voltage analogous to the pulse rate, said means comprising an amplifier connected to said transducer means; level responsive circuit means connected to said amplifier for forming a pulse on a pulse of the finger so observed; means for making the pulse so formed uniform in length; means for summing said pulses so said circuit means can form a voltage analogous to the pulse rate; a voltage dependent oscillator connected to said circuit means for forming output pulses at least partly proportional to the voltage level; register means for storing the number of pulses input thereto from said oscillator; pre-set circuit means connected to said register for providing a pre-set number therein serving as a scale factor so that the number of pulses stored in said register is scaled to the measure of interest; timing means which gates said register on for a specifiEd interval; and, digital display means connected to said register means for providing a digital indication.
Claim 3
Dependent Claim
60 words
The apparatus of claim 1, including a thermistor means adapted to be heated by a patient to obtain an indication of the temperature of the patient; second circuit means connected to said thermistor for converting the temperature sensed thereby to a voltage level; and, means for selectively providing the signal from said second circuit means to said voltage dependent oscillator.
Claim 4
Dependent Claim
20 words
The apparatus of claim 2 including pre-heater means for said thermistor means which raises it to a pre-selected temperature level.
Claim 5
Dependent Claim
33 words
The apparatus of claim 1 including housing means for receiving the finger of the patient and wherein said lamp means is positioned by said housing means for illuminating the finger of the patient.