SYSTEM AND METHOD OF ABLATIVE CUTTING AND PULSED VACUUM ASPIRATION

• US 20140276920A1
• Filed: 03/13/2013
• Published: 09/18/2014
• Est. Priority Date: 03/13/2013
• Status: Active Grant

• Current Assignee: Spectranetics Corporation (Koninklijke Philips N.V.)
• Original Assignee: Spectranetics Corporation (Koninklijke Philips N.V.)
• Inventors: Hendrick, Brandon Thomas, Grace, Kenneth P.
• Granted Patent: US 9,883,885 B2
• Time in Patent Office: Days
• US Class Current: 606/127
• CPC Class Codes: A61B 17/3207 Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions A61B17/32037 takes precedence; endoscopic cutting instruments A61B17/320016
• CPC Class Codes: A61B 17/320758 with a rotating cutting instrument, e.g. motor driven A61B17/320725, A61B17/32075 and A61B17/320783 take precedence; for removing intra-ocular material A61F9/00763; endoscopic rotatable cutting instruments A61B17/32002
• CPC Class Codes: A61B 18/245 for removing obstructions in blood vessels or calculi
• CPC Class Codes: A61B 2017/320775 Morcellators, impeller or propeller like means
• CPC Class Codes: A61B 2218/007 Aspiration
• CPC Class Codes: A61M 1/80 Suction pumps A61M1/64, A61M1/71, A61M60/00 take precedence
• CPC Class Codes: A61M 1/84 Drainage tubes; Aspiration tips for negative pressure wound therapy A61M1/90; for surgical cutting instruments A61B17/32

Abstract

A system for ablation and removal of occlusions from blood vessels is provided. Laser cutting systems and mechanical cutting systems are provided in catheter devices, the cutting systems operable to ablate, cut, dislodge, and otherwise remove occlusions within a blood vessel that may limit or prevent proper circulation. Pulsed aspiration systems are further provided, the pulsed aspiration systems operable to remove ablated, cut, or dislodged material without excessive or unnecessary removal of blood and fluid.

Claims

1. An aspiration system for use with a catheter, the aspiration system comprising:

a vacuum pump in fluid communication with a catheter;

a valve assembly in communication with the vacuum pump, the valve assembly having an open position and closed position; and

a controller for alternating the position of the valve assembly between the open position and the closed position.

2. The aspiration system of claim 1, wherein the valve assembly comprises a solenoid valve.

3. The aspiration system of claim 1, wherein controller comprises a pulse width modulator.

4. The aspiration system of claim 1, further comprising a filter in fluid communication with the catheter.

9. The catheter aspiration system of claim 1, wherein the plurality of optical fibers exposed at the distal end of the catheter are configured in an extending helical configuration.

10. The catheter aspiration system of claim 1, further comprising:

clogging detection means which detects clogging in at least one of the aspiration catheter and an aspiration tube during an aspiration operation, the clogging detection means comprising at least one of pressure sensor and a flow meter for sensing at least one a pressure differential and a flow differential with respect to preferred operating conditions; and

clogging alert means comprising at least one of an audio and a visual indicia when the clogging detection means detects clogging based on the at least one of a pressure differential and a flow differential with respect to preferred operating conditions.

11. The catheter aspiration system of claim 10, wherein the distal end of the catheter further comprises a sharp cutting surface.

12. The catheter aspiration system of claim 11, wherein the sharp cutting surface is aligned with a longitudinal axis of the catheter.

13. The catheter aspiration system of claim 1, wherein the plurality of optical fibers exposed at the distal end are aligned with a longitudinal axis of the catheter.

14. The catheter aspiration system of claim 13, wherein the distal end of the catheter further comprises a sharp cutting surface.

15. The catheter aspiration system of claim 14, wherein the sharp cutting surface is configured in an extending helical configuration.

5. The aspiration system of claim 5, wherein the filter comprises a substantially transparent housing

6. A catheter aspiration system comprising:

a catheter having a tubular wall, the tubular wall comprising a distal end and an orifice for a lumen extending proximally from the distal end, wherein the orifice is smaller than the lumen;

a plurality of optical fibers located within the tubular wall and exposed at the distal end of the catheter;

a vacuum pump in fluid communication with the lumen;

a valve assembly in communication with the vacuum pump, the valve assembly having an open position and closed position; and

a controller for alternating the position of the valve assembly between the open position and the closed position.

7. The catheter aspiration system of claim 6, wherein the valve assembly comprises a solenoid valve.

8. The catheter aspiration system of claim 6, wherein controller comprises a pulse width modulator.

16. A catheter aspiration system comprising:

a catheter comprising a distal tip having a cutting blade attached thereto and extending therefrom;

a vacuum pump in fluid communication with the distal tip;

a valve assembly in communication with the vacuum pump, the valve assembly having an open position and closed position; and

a controller for alternating the position of the valve assembly between the open position and the closed position.

17. The catheter aspiration system of claim 16, wherein the cutting blade is aligned with a longitudinal axis of the catheter.

18. The catheter aspiration system of claim 17, wherein the cutting blade is configured in an extending helical configuration.

19. The catheter aspiration system of claim 16, wherein the cutting blade comprises a plurality of vanes.

20. The catheter aspiration system of claim 19, wherein the lumen is located concentrically within the cutting blade.