US Patent No: 4,273,133

Number of patents in Portfolio can not be more than 2000

Programmable digital cardiac pacemaker with means to override effects of reed switch closure

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A programmable cardiac pacemaker pulse generator utilizing digital circuitry for controlling the provision of cardiac stimulating pulses. The pulse generator is capable of having the rate, the pulse width, the pulse amplitude, the refractory period, the sensitivity and the mode of operation programmed. In addition, the pulse generator can have the output inhibited and can respond to programming signals causing a threshold margin test to be performed, effects of closure of the reed switch overridden, a hysteresis function added and a high rate exceeding the normal upper rate limit programmed. Many of the programmable functions of the pulse generator can either be programmed on a permanent or a temporary basis. The pulse generator further includes means for signaling the acceptance of a programming signal, and means to reset the program acceptance circuit if extraneous signals are detected as programming signals. The program signal acceptance circuit performs several different checks on the detected programming signal including a parity check, an access code check and determining if the proper number of signals were transmitted within a given time. The timing circuit of the pulse generator includes a crystal clock oscillator and counter means for counting the clock pulses therefrom to determine the rate of the pacemaker. The pulse width of each pacemaker pulse is determined by using a voltage controlled oscillator in place of the crystal oscillator to obtain energy compensation due to the battery voltage decreasing with time.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
MED REL, INC.HUMACAO19

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hartlaub, Jerome T St. Paul, MN 52 1528
McDonald, Ray S Roseville, MN 22 561
Rossing, Martin A Coon Rapids, MN 94 2267

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Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
MEDTRONIC, INC. (16)
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7,699,060 Tactile feedback for indicating validity of communication link with an implantable medical device 3 2004
7,934,508 Tactile feedback for indicating validity of communication link with an implantable medical device 3 2010
 
CARDIAC PACEMAKERS, INC. (7)
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7,630,773 Adaptive software configuration for a medical device 8 2006
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TAYONG MEDICAL, LLC (2)
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RE42934 World wide patient location and data telemetry system for implantable medical devices 5 2006
 
Biotronik Mess-und Therapiegeraete GmbH & Co. (1)
4,412,541 Cardiac pacemaker 27 1982
 
BODY SCIENCE LLC (1)
8,771,184 Wireless medical diagnosis and monitoring equipment 0 2007