The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 17, 1979
Filed:
Apr. 28, 1977
George Trenkler, East Providence, RI (US);
Richard G Delagi, Sharon, MA (US);
Lyle E McBride, Jr, Norton, MA (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A medical patient condition monitoring system includes a portable battery-operable transmitter module which transmits monitored conditions of the patient via infrared energy to the receiver input stage of a medical monitoring and display unit. In one embodiment, the transmitter module which may be worn on the patient's person includes medical electrodes which are coupled to the patient's skin to receive electrical signals generated by the patient's anatomy. A voltage-controlled pulse position modulator circuit is coupled to the medical electrodes for generating pulses controllably positioned in time from a reference frequency in dependence upon the amplitude of the signal generated by the medical electrodes. An infrared light-emitting device is coupled to the output of the pulse position modulator circuit for generating infrared energy bursts in synchronism with the pulses generated by the modulator circuit. A receiver module having an infrared photodetector device located in the patient's room receives the infrared energy, and provides an electrical signal pulsed in synchronism with the bursts of infrared energy. A demodulator circuit coupled to the photodetector device generates an output signal which corresponds to the electrical signals received via the medical electrodes. This output signal is coupled to the monitoring and/or display unit for monitoring the patient's condition.