Trans-telephonic acoustical and electrical heart valve monitor system

• US 4,458,687 A
• Filed: 08/12/1982
• Issued: 07/10/1984
• Est. Priority Date: 08/12/1982
• Status: Expired due to Fees

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Dickson, Dale A.
• Primary Examiner(s): Cohen, Lee S.
• Assistant Examiner(s): Hanley, John C.
• Application Number:
  US06/407,537
• Time in Patent Office: 698 Days
• Field of Search: 128/639-641, 128/644, 128/715, 128/904, 128/802, 128/803, 128/773
• US Class Current: 600/397
• CPC Class Codes: A61B 5/282 Holders for multiple electrodes for introduction into the body A61B5/287
• CPC Class Codes: A61B 5/324 Means for providing electrolytes, e.g. syringes
• CPC Class Codes: A61B 7/005 Detecting noise caused by implants, e.g. cardiac valves

Abstract

A heart monitor for transtelephonic monitoring of heart activity and of the functioning of implantable heart valves. The monitor is provided with foam electrodes for monitoring heart activity and with a microphone for simultaneous acoustic monitoring of heart valve function. The monitor is adapted for easy use by the inclusion of an electrode gel reservoir and a pump for transferring gel to the electrodes. A cover for protection of the electrodes is provided. Movement of the cover to expose the electrodes activates the pump and moistens the electrodes with gel. Closing the cover seals the electrodes and prevents evaporation of the gel.

Claims

1. A monitor system comprising:

a monitor body having a first exterior surface;

a reservoir within said monitor body for storage of electrode gel;

at least two electrodes, mounted fixedly to the first surface of said monitor body and protruding therefrom, each of said electrodes having a central bore in fluid connection with said reservoir and open to the exterior of said electrodes;

a cover movably attached to said monitor body having an inner surface facing the first surface of said monitor body and having an outer surface facing away from the first surface of said monitor body and having at least two apertures correspondingly arranged to said at least two electrodes such that said cover is locatable in a first position, a first distance from the first surface of said monitor body, at which said at least two electrodes protrude from said outer surface of said cover through said at least two apertures of said cover, said cover slideably moveable between said first position and a second position at which the apertures of said cover are displaced from said at least two electrodes and at which the inner surface of said cover is in contact with said at least two electrodes and seals the bores of said at least two electrodes.

2. A monitor system according to claim 1 further comprising pump means, mounted to said monitor body in fluid communication with said reservoir and with the bores of said at least two electrodes, for pumping gel from said reservoir to said at least two electrodes.

3. A monitor system according to claim 1 further comprising pump means mounted to said monitor body in fluid communication with said reservoir and with the bores of said at least two electrodes, for pumping said gel from said reservoir to said electrodes, coupled to said cover such that movement of said cover from said second position to said first position results in the pumping of gel from said reservoir to said at least two electrodes.

4. A monitor system according to claim 3 wherein said pump means is comprised of at least one pump which is comprised of a pump body having a pump bore substantially perpendicular to said first surface, a piston slideably mounted within the pump bore of said pump body and protruding slideably through an aperture in said first surface of said monitor body, and a spring mounted within the pump bore of said pump body urging said piston outward from the first surface of said monitor body and into contact with the inner surface of said cover.

5. A monitor system according to claim 4 wherein said at least one pump is further comprised of a first check valve means for allowing flow of gel from said reservoir into the pump bore of said pump body, but preventing flow of gel from the pump bore of said pump body into said reservoir whereby when said cover is moved from said first position to said second position, the pump bore of said pump body fills with gel.

6. A monitor system according to claim 5 wherein said pump is further comprised of a second check valve means for allowing flow of gel from the pump bore of said pump body to at least one of said electrodes but preventing flow of gel from said electrode to the pump bore of said pump body whereby when said cover is moved from said second position to said first position, gel is pumped from the pump bore of said pump body to at least one of said electrodes.

7. A monitor system according to claim 6 wherein said cover is further comprised of a first peg and wherein said monitor body has a first groove slideably receiving said first peg, said first peg and the groove of said monitor body determining the path of movement of said cover from said first position to said second position.

8. A monitor system according to claim 4, or claim 5, or claim 6, or claim 7 wherein said cover is slideably movable from said first position to a third position at which said cover is a second distance from the first surface of said monitor body greater than said first distance and said at least two electrodes protrude through the at least two apertures of said cover.

9. A monitor system according to claim 8 wherein said spring within the pump bore of said pump body, by means of said piston, is further adapted to stabilize said cover in said third position.

10. A monitor system according to claim 9 wherein the at least two apertures of said cover are elongated to permit movement of said cover from said first position to said third position while said at least two electrodes are protruding through the at least two apertures of said cover.

11. A monitor system comprising:

a monitor body having a first exterior surface;

a reservoir within said monitor body for storage of electrode gel;

at least one electrode, mounted fixedly to the first surface of said monitor body and protruding therefrom, having a central bore in fluid communication with said reservoir and open to the exterior of said at least one electrode;

a protective cover movably attached to said monitor body and moveable from a first position covering said bore of said at least one electrode to a second position exposing said at least one electrode; and

pump means for pumping gel to said at least one electrode, mounted to said monitor body, in fluid communication with said reservoir and with the bore of said at least one electrode, further coupled to said protective cover so that movement of said cover from said first position to said second position pumps gel from said reservoir to said at least one electrode.