Remote sensing catheter system and methods

• US 20100168564A1
• Filed: 12/09/2009
• Published: 07/01/2010
• Est. Priority Date: 08/12/2008
• Status: Active Grant

• Current Assignee: Osprey Medical, Inc.
• Original Assignee: Osprey Medical, Inc.
• Inventors: Shapland, James Edward, Quinn, Christopher G., Doan, Tuan M.
• Granted Patent: US 8,409,161 B2
• Time in Patent Office: Days
• US Class Current: 600/433
• CPC Class Codes: A61M 1/74 Suction control underwater drainage A61M1/61
• CPC Class Codes: A61M 2202/049 Toxic

Abstract

A remote sensing catheter system including an injection catheter and a collection catheter. In one method of use, an external sensor of the system determines the timing of operation of the collection catheter. In another method of use, a sensor determines the volume of medium in the injection.

Claims

1. A method of collecting a medium from a coronary sinus using a catheter system, the method comprising the steps of:

a) providing a catheter system including a collection catheter;

b) positioning a distal end of the collection catheter within the patient'"'"'s coronary sinus;

c) detecting an injection of the medium in the catheter system, including;

i) establishing a start time of the injection; and

ii) determining the volume of medium in the injection; and

d) initiating operation of the collection catheter a predetermined time after the start time of the injection, wherein the step of initiating operation occurs only when the volume of medium in the injection is greater than a predetermined amount.

2. The method of claim 1, further including providing an injection sensor that detects the injection of the medium.

3. The method of claim 2, wherein the injection sensor is located outside the patient'"'"'s body during use.

4. The method of claim 2, further including providing an interface unit electrically connected to both the injection sensor and an aspiration unit, the aspiration unit being in fluid communication with the collection catheter, the interface unit controlling the initiation of operation of the collection catheter.

5. The method of claim 1, wherein the predetermined time after the start time of the injection is about 2 to 6 seconds.

6. The method of claim 1, wherein the predetermined time after the start time of the injection is about 4 to 6 seconds.

7. The method of claim 1, wherein the step of determining the volume of medium in the injection is based upon the duration of the injection.

8. The method of claim 7, wherein the step of initiating operation occurs only when the duration of the injection is greater than 1.5 seconds.

9. The method of claim 1, wherein the step of detecting the injection occurs prior to the medium reaching the patient'"'"'s coronary artery.

10. The method of claim 2, wherein the injection sensor is a pressure sensor.

11. The method of claim 1, further including establishing an end time of the injection, and ceasing operation of the collection catheter a predetermined time after the end time of the injection.

12. The method of claim 11, wherein the predetermined time after the end time of the injection is about 4 to 10 seconds after the end time.

13. The method of claim 1, further including providing a collection sensor that detects the absence of the medium in the collection catheter, and ceasing operation of the collection catheter upon detecting the absence of the medium in the collection catheter.

14. The method of claim 13, wherein the collection sensor is an impedance sensor.

15. The method of claim 13, further including providing an interface unit electrically connected to both the collection sensor and an aspiration unit, the aspiration unit being in fluid communication with the collection catheter, the interface unit controlling the cessation of operation of the collection catheter.

16. The method of claim 13, wherein the collection sensor is located outside the patient'"'"'s body during use.

17. The method of claim 1, wherein the step of detecting the injection of the medium includes detecting the injection of a contrast media.

25. The method of claim 1, wherein the step of providing the catheter system includes providing the catheter system including an injection catheter, the method further including positioning a distal end of the injection catheter within a patient'"'"'s coronary artery, and detecting the injection of the medium in the injection catheter of the catheter system.

18. A method of collecting a medium from a coronary sinus using a catheter system, the method comprising the steps of:

a) providing a catheter system including a collection catheter, the collection catheter including a sensor, the sensor being located outside a patient'"'"'s body during use;

b) positioning a distal end of the collection catheter within the patient'"'"'s coronary sinus;

c) initiating operation of the collection catheter to remove the medium from the patient'"'"'s coronary sinus; and

d) ceasing operation of the collection catheter when the sensor detects the absence of the medium in the collection catheter.

19. A method of removing a medium from a coronary sinus, the method comprising the steps of:

a) providing a catheter system including;

i) an injection senor, the injection sensor being external to a patient'"'"'s body during use of the system;

ii) a collection catheter and a collection sensor, the collection sensor being external to the patient'"'"'s body during use of the system;

iii) an aspiration unit in fluid communication with the collection catheter; and

iv) an interface unit electrically connected to each of the injection sensor, the collection sensor, and the aspiration unit, the interface unit controlling the operation of the collection catheter;

b) positioning a distal end of the collection catheter within the patient'"'"'s coronary sinus;

c) detecting the injection of a medium in the catheter system with the injection sensor, prior to the medium reaching the patient'"'"'s coronary artery, the step of detecting including;

i) establishing a start time of the injection; and

ii) monitoring the injection duration;

d) automatically initiating operation of the collection catheter a predetermined time after the start time of the injection, wherein the step of initiating operation occurs only when the injection duration is greater than a predetermined duration parameter;

e) after initiating operation of the collection catheter, monitoring the collection sensor for the presence of the medium in the collection catheter; and

e) automatically ceasing operation of the collection catheter after a desired majority of the medium has been removed from the patient'"'"'s coronary sinus.

20. The method of claim 19, wherein the injection sensor is a pressure sensor.

21. The method of claim 19, wherein the collection sensor is an impedance sensor.

22. The method of claim 19, wherein the predetermined time after the start time of the injection is about 4 to 6 seconds.

23. The method of claim 22, wherein the predetermined duration parameter is 1.5 seconds.

24. The method of claim 19, wherein the step of detecting the injection of the medium includes detecting the injection of a contrast media.

26. The method of claim 19, wherein the step of providing the catheter system includes providing the catheter system including an injection catheter, the method further including positioning a distal end of the injection catheter within a patient'"'"'s coronary artery, and detecting the injection of the medium in the injection catheter of the catheter system.