Percutaneous aspiration thrombectomy catheter system

• US 5,827,229 A
• Filed: 05/24/1995
• Issued: 10/27/1998
• Est. Priority Date: 05/24/1995
• Status: Expired due to Term

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Corporation Northwest Technology Center Inc.
• Inventors: DeVore, Lauri J., Gordon, Lucas S., Auth, David C.
• Primary Examiner(s): Weiss, John G.
• Assistant Examiner(s): Cho, David J.
• Application Number:
  US08/449,203
• Time in Patent Office: 1,252 Days
• Field of Search: 604/171, 604/264, 604/280, 604/96, 604/22, 604/317, 606/159, 606/198, 606/200
• US Class Current: 604/171
• CPC Class Codes: A61B 17/22 Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for dilators A61M29/00
• CPC Class Codes: A61B 17/22031 Gripping instruments, e.g. forceps, for removing or smashing calculi A61B17/221 takes precedence
• CPC Class Codes: A61B 2017/22039 eccentric
• CPC Class Codes: A61B 2217/005 with suction drainage system
• CPC Class Codes: A61M 2025/0183 Rapid exchange or monorail catheters
• CPC Class Codes: A61M 25/0029 characterized by features relating to least one lumen located at the middle part of the catheter, e.g. slots, flaps, valves, cuffs, apertures, notches, grooves or rapid exchange ports catheter shaft surface irregularities A61M2025/006
• CPC Class Codes: A61M 25/0032 characterized by at least one unconventionally shaped lumen, e.g. polygons, ellipsoids, wedges or shapes comprising concave and convex parts
• CPC Class Codes: A61M 25/0068 Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
• CPC Class Codes: A61M 25/0082 Catheter tip comprising a tool

Abstract

An improved system for removing thrombus from blood vessels comprising a catheter shaft having proximal and distal ends, designed to be advanced through a hemostasis valve and guide catheter and over a guidewire for placement of its distal end at a point proximal to a thrombus, the catheter shaft defining at least one longitudinally-extending lumen, the catheter having a guidewire retainer which retains the guidewire within the catheter in a peripheral or non-centered part of the catheter cross-section, the distal tip of the catheter being angled back from the guidewire retainer to allow the catheter to follow the guidewire around tight bends and across restrictions easily; a suction device in fluid communication with the proximal end of the catheter for providing vacuum down the catheter lumen to the distal tip, for drawing thrombus into the lumen; and the lumen terminating in an angled tip at the distal end, the angled tip improving the removal of thrombus adhering to the vessel wall and reducing clogging of the hole with thrombus.

Claims

1. A percutaneous aspiration thrombectomy catheter system comprising:

(a) a catheter shaft having proximal and distal ends, designed to be advanced through a hemostasis valve and over a guidewire for placement of its distal end at a point proximal to the thrombus, the catheter shaft defining at least one longitudinally-extending lumen, said catheter having a guidewire retaining means which retains the guidewire within the catheter in a peripheral or non-centered part of the catheter cross-section, the distal tip opening of said catheter being angled back from the guidewire retaining means to allow the catheter to follow the guidewire around tight bends and across restrictions easily; and

(b) suction means in fluid connection with the proximal end of the catheter for providing vacuum down a first catheter lumen to the distal tip, for drawing thrombus into said first lumen,

wherein said first lumen terminates in an angled tip at the distal end, the angled tip opening improving the removal of thrombus adhering to the vessel wall and reducing clogging of the hole with thrombus;

wherein the catheter is provided with a second lumen having a distal end and a proximal end as a guidewire retaining means, said second lumen extending proximally from the distal end of the catheter and terminating at a point distal to where the catheter passes through the hemostasis valve; and

wherein the proximal end of the second lumen is provided with a slit for a portion of its length from the proximal end toward the distal end to allow for the peeling of the catheter from the guidewire.

2. A percutaneous aspiration thrombectomy catheter system comprising:

(a) a catheter shaft having proximal and distal ends, designed to be advanced through a hemostasis valve and over a guidewire for placement of its distal end at a point proximal to the thrombus, the catheter shaft defining at least one longitudinally-extending lumen, said catheter having a guidewire retaining means which retains the guidewire within the catheter in a peripheral or non-centered part of the catheter cross-section, the distal tip opening of said catheter being angled back from the guidewire retaining means to allow the catheter to follow the guidewire around tight bends and across restrictions easily;

(b) suction means in fluid connection with the proximal end of the catheter for providing vacuum down a first catheter lumen to the distal tip, for drawing thrombus into said first lumen, wherein said lumen terminates in an angled tip at the distal end, the angled tip opening improving the removal of thrombus adhering to the vessel wall and reducing clogging of the hole with thrombus; and

(c) a collection bottle in fluid connection with the proximal end of the catheter and having a filter means within said collection bottle, said collection bottle also having a window or clear portion through which any clot which collects on the filter means may be visualized,

wherein the collection bottle is provided with an access port located above the filter means through which access port saline or other washing solution may be directed onto the collected thrombus material to improve visualization and discernment of clot fragments.