Cardiac pacer

• US 3,926,198 A
• Filed: 05/02/1975
• Issued: 12/16/1975
• Est. Priority Date: 06/10/1974
• Status: Expired due to Term

• Current Assignee: Steve A. Kolenik
• Original Assignee: Steve A. Kolenik
• Inventors: Kolenik, Steve A.
• Primary Examiner(s): Kamm, William E.
• Application Number:
  US05/574,199
• Time in Patent Office: 228 Days
• Field of Search: 128/419P,419PG,419PS,419R,421,422,423 136/86F,153 307/304,313
• US Class Current: 607/36
• CPC Class Codes: A61N 1/37512 Pacemakers
• CPC Class Codes: A61N 1/378 Electrical supply

Abstract

The forces which are imparted by a cardiac pacer to adjacent tissues are below the threshold of troublesome difficulty when the body is subjected to acceleration or deceleration. Such below-threshold forces are attributed to controlling the weight of the cardiac pacer to be less than 100 grams, and to controlling the specific gravity to be less than 1.7. Such low density and low weight are attainable by reason of the use of a miniaturized oscillator featuring complementary metal oxide semiconductors consuming such a small power that more than 5 years of life are attainable from the thionyl chloride-lithium type of battery having a prolonged stable voltage of at least 3.3 volts. The cardiac pacer is thin enough to avoid troublesome bulging of the skin adjacent the implanting location.

Claims

1. A CARDIAC PACER CONSISTING ESSENTIALLY OF THE COMBINATION OF:

A METAL CASING HERMETICALLY SEALING THE INTERIOR ZONES OF THE CARDIAC PACER FROM EXPOSURE TO BODY FLUIDS IN THE CAVITY IN WHICH THE CARDIAC PACER IS IMPLANTED, SAID CASING BEING LESS THAN 20 MM THICK, AND EACH OTHER ORTHAGONAL DIMENSION BEING LESS THAN 60 MM, SUCH SMALL DIMENSIONS PERMITTING IMPLANTATION WITHOUT TROUBLESOME BULGING OF THE SKIN ADJACENT THE CARDIAC PACER, SAID METAL CASINFG SHIELD ING ELECTRICAL COMPONENTS FROM ELECTRO-MAGNETIC INTERFERENCE AND CONSTITUTING A GROUNDING ELECTRODE FOR THE CARDIAC PACER;

A HERMETICALLY SEALED BATTERY CHAMBER AND A HERMETICALLY SEALED CIRCUITRY CHAMGER WITHIN SAID CASING;

A PLURALITY OF BATTERIES IN SAID BATTERY CHAMBER, THERE BEING AN ELECTRICAL CONDUCTOR TRANSMITTING BATTERY POWER FROM EACH BATTERY TO SAID CIRCUITRY CHAMBER, EACH BATTERY GENERATING NO GAS, EACH BATTERY HAVING A LITHIUM ANODE AND AN ELECTROLYTE CONSISTING PREDOMINANTLY OF THIONYL CHLOTRIDE, EACH BATTERY HAVING PROLONGED LOW IMPEDANCE AND CONSTANT HIGH VOLTAGE OF AT LAST 3.3 VOLTS DURING AN EXPECTED LIFE OF MORE THAN 5 YEARS THE VOLTAGE DIMINISHING SIGNIFICANTLY ONLY DURING THE TERMINAL PERIOD OF USE OF THE BATTERY, WHEREBY DETECTION OF BATTERY DEPLETION IS MANAGEBLE, THE POSITIVE POLE OF THE BATTERIES BEING GROUNDED TO THE METAL CASING;

WIRES AND PASS-THROUGHS WITHIN THE CASING ASSOCIATING AT LEAST TWO BATTERIES IN PARRALLEL AND ASSURING THE REDUNDANT RELIABILITY OF PARALLEL BATTERIES;

A CIRCUITRY UNIT EMPLOYING COMPLEMENTARY METAL OXIDE SEMICONDUCTOR CIRCUIT MEANS FOR PRODUCING PULSES ADAPTED TO STIMULATE THE HEART, SAID CIRCUIT MEANS BEING ELECTRICALLY ENERGIZED BY CURRENT FROM SAID BATTERIES, THE CASING OF THE CIRCUIT MEANS BEING GROUNDED TO THE CASING OF THE HEART PACER, SAID CIRCUIT MEANS BEING WITH SAID CIRCUITRY CHAMBER, SAID CIRCUIT MEANS INCLUDING AN OUTPUT WIRE, SAID WIRE AND PASS-THROUGH BEING ELECTRICALLY CONNECTED TO SAID CIRCUIT MEANS;

SAID COMPLEMENTARY METAL OXIDE SEMICONDUCTORS AND SAID CIRCUIT MEANS CONSUMING SUCH A SMALL AMOUNT OF POWER THAT THE BATTERY LIFE IS MORE THAN 5 YEARS;

ELECTRICAL SOCKET MEANS ADAPTED TO TRANSMIT TO AN ELECTRICAL CONDUIT THE OUTPUT FROM SAID CIRCUIT MEANS SAID ELECTRICAL CONDUIT MEANS BEING ADAPTED TO TRANSMIT THE OUTPUT FROM SAID CIRCUIT MEANS TO A SIGNAL-RECEIVING ZONE OF A HEART, ELECTRIICAL PASS-THROUGH MEANS CONNECTING SAID OUTPUT WIRE TO SAID SOCKET MEANS;

AND SAID COMBINATION OF CASING BATTERIES, WIRESM PASS-THROUGHS CIRCUIT MEANS, AND ELECTRICAL SOCKET MEANS HAVING A WEIGHT LESS THAN 100 GRAMS AND A SPECIFIC GRAVITY LESS THAN 1.7 WHEREBY CHANGES IN ACCELERATION OR DECELERATION OF A BODY HAVING SUCH IMPLANTED CARDIAC PACER IMPART ONLY FORCES WHICH ARE TOLERABLE TO TISSUE ADJACENT THE CAVITY IN WHICH THE CARDIAC PACER IS IMPLANTED.

2. The cardiac pacer of claim 1 in which the casing consists of titanium.

3. The cardiac pacer of claim 1 in which the electrical socket means is an insert within a molded organic plastic shield.