Intravascular system for occluded blood vessels and guidewire for use therein

• US 6,936,056 B2
• Filed: 01/31/2003
• Issued: 08/30/2005
• Est. Priority Date: 07/26/1996
• Status: Expired due to Fees

• Current Assignee: Kensey Nash Corporation (DSM-Firmenich AG)
• Original Assignee: Kensey Nash Corporation (DSM-Firmenich AG)
• Inventors: Kaufmann, Joseph W., Henderson, John Michael, Nash, John E., Fisher, William T., Dodson, Charles W. Jr.
• Primary Examiner(s): Truong, Kevin T.
• Application Number:
  US10/355,754
• Publication Number:
  US 20030114869A1
• Time in Patent Office: 942 Days
• Field of Search: 606/159, 606/113, 606/127, 606/167, 606/170, 606/180, 606/192, 606/194, 604/22
• US Class Current: 606/159
• 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 2017/00845 of moving parts with respect to each other
• CPC Class Codes: A61B 2017/00853 low friction, hydrophobic and corrosion-resistant fluorocarbon resin coating (ptf, ptfe, polytetrafluoroethylene)
• CPC Class Codes: A61B 2017/22038 with a guide wire
• CPC Class Codes: A61B 2217/005 with suction drainage system
• CPC Class Codes: A61B 2217/007 with irrigation system
• CPC Class Codes: A61M 1/77 Suction-irrigation systems aspiration tips supplying fluids A61M1/85; specific for negative pressure wound therapy A61M1/92; combined with tracheal tubes A61M16/0463

Abstract

A system and method for opening a lumen in an occluded blood vessel, e.g., a coronary bypass graft, of a living being. The system comprises an atherectomy catheter having a working head, e.g., a rotary impacting impeller, and a debris extraction sub-system. The atherectomy catheter is located within a guide catheter. The working head is arranged to operate on, e.g., impact, the occlusive material in the occluded vessel to open a lumen therein, whereupon some debris may be produced. The debris extraction sub-system introduces an infusate liquid at a first flow rate adjacent the working head and withdraws that liquid and some blood at a second and higher flow rate, through the guide catheter to create a differential flow adjacent the working head, whereupon the debris is withdrawn in the infusate liquid and blood for collection outside the being'"'"'s body. The introduction of the infusate liquid may also be used to establish an unbalanced flow adjacent the working head to enable the atherectomy catheter to be steered hydrodynamically. A guide wire having an inflatable balloon on its distal end may be used with the atherectomy catheter to block the flow of debris distally, while enabling distal tissues to be perfused with an oxygenating liquid. At least one flow control port may be provided in the guide catheter to prevent collapse of the vessel being revascularized. A cradle is provided to fix the guide catheter and guide wire in position within the body of the being while enabling the atherectomy catheter to be advanced along the guide wire and through the guide catheter. The guide catheter includes a wear resistant coating and is constructed so that its distal end includes plural sections of different outside diameters, with the distal most section being of the smallest outside diameter. A control console is provided to establish various modes of operation of the system based on manual inputs via switches or voice commands via voice recognition circuitry. A video panel displays the various modes of operation and instructions to the operator.

Claims

1. An intravascular system for use by an operator to open a lumen in an occluded blood vessel portion of a living being'"'"'s vascular system, the occluded blood vessel portion being occluded by an occlusive material, said intravascular system comprising an instrument for opening a lumen in the occlusive material and a control system, said instrument being arranged to be extended into the blood vessel portion to a position adjacent the occlusive material in the interior of the occluded blood vessel portion to open a lumen therein for the flow of blood therethrough under the control of said control system, said control system enabling plural modes of operation of said instrument and comprising a display and means for accepting an audio command regarding a mode of operation to be accomplished from the operator and for visually displaying that mode of operation on said display.

2. The intravascular system of claim 1 wherein said means for accepting an audio command comprises voice recognition means.

3. The intravascular system of claim 1 comprising a means for providing instructions for continuing use of said system to the operator by said display.

4. The intravascular system of claim 1 wherein said control system is arranged to accept manual inputs thereto to establish said mode of operation.

5. The intravascular system of claim 4 wherein said display displays information about the mode selected by said manual inputs.

6. The intravascular system of claim 5 comprising a means for providing instructions for continuing use of said system to the operator by said display.