Atherectomy device with a positive pump means

• US 4,957,482 A
• Filed: 03/22/1989
• Issued: 09/18/1990
• Est. Priority Date: 12/19/1988
• Status: Expired due to Term

• Current Assignee: Samuel Shiber
• Original Assignee: Surgical Systems & Instruments, Inc.
• Inventors: Shiber, Samuel
• Primary Examiner(s): Hafer, Robert A.
• Assistant Examiner(s): NOT, DEFINED
• Application Number:
  US07/326,967
• Time in Patent Office: 545 Days
• Field of Search: 606/159, 606/170, 606/180, 604/22, 604/264, 604/266, 604/268, 128/751-755
• US Class Current: 604/22
• CPC Class Codes: A61B 17/22012 in direct contact with, or very close to, the obstruction or concrement for removing obstructions in blood vessels by laser A61B18/245
• 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 17/320783 through side-hole, e.g. sliding or rotating cutter inside catheter
• CPC Class Codes: A61B 18/082 Probes or electrodes therefor
• CPC Class Codes: A61B 18/24 with a catheter A61B18/26, A61B18/28 take precedence
• CPC Class Codes: A61B 18/245 for removing obstructions in blood vessels or calculi
• CPC Class Codes: A61B 2017/22038 with a guide wire
• CPC Class Codes: A61B 2017/22052 eccentric
• CPC Class Codes: A61B 2090/3614 using optical fibre
• CPC Class Codes: A61B 2217/005 with suction drainage system
• CPC Class Codes: A61M 1/75 Intermittent or pulsating suction A61M1/63, A61M1/772 take precedence
• CPC Class Codes: F16C 1/02 for conveying rotary movements
• CPC Class Codes: F16C 2316/10 in medical appliances, e.g. in diagnosis, dentistry, instruments, prostheses, medical imaging appliances
• CPC Class Codes: F16D 7/02 of the friction type

Abstract

An atherectomy system for cutting, ingesting and removing an obstruction from within a patient'"'"'s artery, comprising a flexible guide-wire insertable into the artery, a flexible rotary-catheter rotatably disposed and slidable over the flexible guide-wire, a blade forming a distal end of the flexible rotary-catheter having teeth on its periphery which are bent inward, a continuous passage for ingesting the cut obstruction material between the flexible rotary-catheter and the flexible guide-wire, means at the proximal end of the flexible rotary-catheter for rotating it and positive displacement pump means connected to the continuous passage to pull the cut obstruction material proximally.

Claims

1. An atherectomy system for cutting, ingesting and removing an obstruction from within a patient'"'"'s artery, comprising in combination:

a flexible guide-wire insertable into said artery,

a flexible rotary-catheter being rotatably disposed and slidable over said flexible guide-wire,

a blade forming a distal end of said flexible rotary-catheter having at least one tooth on its periphery which is bent inward,

a continuous passage surrounding said flexible guide-wire for ingesting the cut obstruction material, said continuous passage being defined between said flexible rotary-catheter and said flexible guide-wire,

coupling means at said proximal end of said flexible rotary-catheter for coupling it to a rotating means, and

suction means connected to said continuous passage to pull said cut obstruction material proximally.

2. An atherectomy system as in claim 1, wherein said suction is provided by a positive displacement pump means.

3. An atherectomy system as in claim 1, wherein said flexible rotary-catheter has an increased wall thickness and increased torque carrying capacity at the vicinity of its proximal end compared with the same at its distal end.

4. An atherectomy system as in claim 1, wherein said flexible rotary-catheter has a wall reinforced with a spiral member.

5. An atherectomy system as in claim 4, wherein said spiral member is made of metal.

6. An atherectomy system as in claim 4, wherein said spiral member is made of a flat metal ribbon.

7. An atherectomy system as in claim 1, said flexible guide-wire having distal barrier means to counter distal movement of surrounding obstruction material while said blade cuts the obstruction material.

8. An atherectomy system as in claim 1, said flexible guide-wire containing a optical fiber.