Medical stimulation and/or monitoring device interacting with the body of a patient based upon selectable parameter set

• US 5,159,926 A
• Filed: 08/28/1990
• Issued: 11/03/1992
• Est. Priority Date: 08/28/1989
• Status: Expired due to Term

• Current Assignee: Pacesetter AB (Abbott Laboratories)
• Original Assignee: Siemens AG
• Inventors: Ljungstroem, Jan
• Primary Examiner(s): Kamm, William E.
• Assistant Examiner(s): SCHAETZLE, KENNEDY
• Application Number:
  US07/573,794
• Time in Patent Office: 798 Days
• Field of Search: 128/419 PG
• US Class Current: 607/30
• CPC Class Codes: A61N 1/36542 controlled by body motion, e.g. acceleration

Abstract

A medical device interacting with the body of a patient for stimulating and/or monitoring a physiological function includes control electronics which uses a parameter set which can be fetched from a memory, the parameter set defining the interaction. A number of different parameter sets can be stored in the memory, with a switching system being provided to fetch respectively different parameter sets under differing conditions.

Claims

1. A medical device comprising:

a housing having a size adapted for implantation in the body of a patient;

means adapted for interacting with the body of said patient with respect to a physiological function of the patient;

control means in said housing and electrically connected to said means adapted for interacting, for defining the interaction of said means adapted for interacting on the basis of a parameter set;

a memory in said housing containing a plurality of different parameter sets each parameter set comprising values of a plurality of individual parameters matched to a specific set of physiological conditions of said patient with each set of conditions requiring a different interaction with said patient by said means for interacting, and each of said parameter sets being stored as a set at a specific Address of said memory;

said control means including means for fetching one of said parameter sets at a time for use by said control means; and

switch means connected to said control means for enabling only the address of a parameter set matched to current conditions, said switch means including pacemaker wearer-operated means for selecting an address which is to be enabled, said pacemaker wearer-operated means being an external unit and further including means for telemetrically communicating between said control means in said housing and said external unit.

2. A medical device as claimed in claim 1, wherein said switch means includes a real-time clock and wherein said switch means is controlled by said real-time clock for enabling fetching of respective parameter sets based on the time of day.

3. A medical device as claimed in claim 1 wherein said human-operated unit further includes human-actuated means for subsequently unihibiting fetching of a previously selected parameter set.

4. A medical device as claimed in claim 1 wherein said switch means includes means for automatically inhibiting fetching of a previously selected parameter set after the expiration of a defined time interval.

5. A medical device as claimed in claim 1 wherein said switch means is a switch means for enabling fetching of a parameter set dependent on the intensity of said physiological function.

6. A medical device as claimed in claim 1 wherein said means adapted for interacting with the body of a patient includes means adapted for detecting physiological events in said patient.

7. A medical device as claimed in claim 1 wherein said means adapted for interacting with the body of a patient includes means adapted for stimulating physiological events in said patient.

8. A medical device as claimed in claim 1 wherein said means adapted for interacting with the body of a patient is a heart pacemaker including means for monitoring the electrical activity of the heart of said patient and means for stimulating heart activity in said patient with electrical stimulation pulses.