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Details for Patent: 5,460,605

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Details for Patent: 5,460,605

Title: Diagnosis, evaluation and treatment of coronary artery disease by exercise simulation using closed loop drug delivery of an exercise simulating agent beta agonist
Abstract:Methods and devices for the diagnosis, evaluation and treatment of coronary artery disease (CAD) by means of a closed-loop drug delivery system that delivers an exercise simulating agent, including novel exercise simulating agents which elicit both acute and adaptive cardiovascular responses similar to those elicited by aerobic activity are provided. The acute responses to the exercise simulating agent are used to diagnose and evaluate CAD in lieu of the acute responses to aerobic exercise. Due to their adaptive responses these compounds may be used to treat CAD in lieu of the adaptive responses caused by aerobic exercise training or to treat other conditions where the adaptive responses caused by aerobic exercise are desirable.
Inventor(s): Tuttle; Ronald R. (Oceanside, CA), Browne; Clinton E. (Escondido, CA)
Assignee: Gensia, Inc. (San Diego, CA)
Filing Date:Dec 07, 1993
Application Number:08/163,839
Claims:1. A device for eliciting cardiovascular responses in a mammal similar to cardiovascular responses elicited by aerobic exercise which comprises:

(a) drug delivery system for administering an exercise simulating agent into said mammal's bloodstream;

(b) infusion control system for controlling infusion of said exercise simulating agent into the bloodstream of said mammal which is operatively connected to said delivery system; and

(c) monitoring system connected to said mammal to measure response level of said mammal to said exercise simulating agent which is operatively connected to said drug delivery system and infusion control system such that infusion of exercise simulating agent may be feedback-controlled to obtain a preselected range of responses of said mammal to said exercise simulating agent, said preselected range of responses being varied as a function of time by the infusion control system.

2. A device according to claim 1 wherein said control system includes a discontinuing system for discontinuing infusion of exercise simulating agent into said mammal's bloodstream when a preselected time period has expired or when said cardiovascular responses are outside said preselected range and which is operatively connected to said drug delivery system.

3. A device according to claim 2 wherein said control system includes a termination system for terminating absorption of said exercise simulating agent into said mammal's bloodstream operatively connected to said discontinuing system which is actively activated simultaneously with said discontinuing system.

4. The device according to claim 1 wherein the monitoring system includes an electrocardiographic monitor.

5. The device according to claim 2 wherein the drug delivery system includes a transdermal iontophoretic element.

6. The device according to claim 5 wherein the discontinuing system includes a switching element which stops or reverses current to the iontophoretic element.

7. The device for eliciting cardiovascular responses of claim 1 wherein the infusion control system includes a microprocessor.

8. A system for the closed-loop administration of a drug which causes a physical response in a mammal comprising:

(a) a drug delivery system connected to the mammal;

(b) a monitor connected to the mammal capable of determining the physical response of the mammal, and

(c) a control system to control the drug infusion to the mammal so as to vary the physical response as a function of time for diagnosis, the control system being connected in closed-loop fashion to the monitor and the drug delivery system.

9. The system of claim 8 wherein the physical response of the mammal is the heart rate.

10. The system of claim 9 wherein the drug is an exercise simulating agent.

11. The system of claim 10 wherein the drug is a catecholamine.

12. The system of claim 8 wherein the monitor includes an electrocardiograph.

13. The system of claim 8 wherein the drug delivery system is a transdermal drug delivery device.

14. The system of claim 8 wherein the drug delivery system is an intravenous drug delivery device.

15. The system of claim 8 further including:

(d) a display for providing an indication of the physical response.

16. The system of claim 8 wherein the control system includes a microprocessor.

17. The system of claim 8 wherein the control system includes means to vary the physical response as a linear function of time.

18. The system of claim 8 wherein the control system includes means to vary the physical response as a step function.

19. The system of claim 8 further including:

(d) a user input device for specifying the desired response of the physical response as a function of time.

20. The system of claim 19 wherein the user input device includes means to specify the rate of increase of a linear increase in the physical response.

21. The system of claim 19 wherein the user input device includes means to specify the time and size of a step function increase in the physical response.

22. The system of claim 19 wherein the user input device includes means to specify patient specific data.

23. The system of claim 19 further including:

(d) an input operatively connected to the control system for initiating a hold of the physical response at the then current value.

24. The system for the closed-loop administration of a drug of claim 8 wherein the control system includes a microprocessor.
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