EMBOLECTOMY CATHETER

• US 3,635,223 A
• Filed: 12/02/1969
• Issued: 01/18/1972
• Est. Priority Date: 12/02/1969
• Status: Expired due to Term

• Current Assignee: Charles H. Klieman
• Original Assignee: Charles H. Klieman
• Inventors: Klieman, Charles H.
• Primary Examiner(s): Truluck, Dalton L.
• Application Number:
  US04/881,363
• Time in Patent Office: 777 Days
• Field of Search: 128/348-351,344,303,325,246,DIG.9,2,356,328
• US Class Current: 606/194
• 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 90/39 Markers, e.g. radio-opaque or breast lesions markers
• CPC Class Codes: A61M 25/1002 characterised by balloon shape A61M25/1006, A61M25/1009 take precedence

Abstract

Apparatus for extracting emboli comprising a cannula, preferably guidable, adapted to be projected through a body passage (e.g., vein or artery) to a point adjacent the embolus to be removed, together with a catheter adapted to be passed through the cannula and having a distal end provided with an inflatable balloon the surface of which has rearwardly angled protrusions designed to engage an embolus into which the catheter end has been projected and to convey the captured embolus into the cannula as the catheter is withdrawn therein.

Claims

1. An embolectomy catheter comprising an elongated tubular body having a closed soft flexible distal tip, at least one perforation through the wall of said tubular body adjacent said tip, inflatable sleeve of elastomeric material covering said perforation and sealed to the surface of said body distally and proximally of said perforation, and a plurality of protrusions of the same material integrally formed on said sleeve at a plurality of circumferential points, projecting laterally therefrom and slanted away from said distal tip, whereby when said tip is inserted within a blood vessel past an embolus, said slanted protrusions will engage said embolus and upon retraction of said catheter will ensure withdrawal of said embolus from the blood vessel.

2. A catheter according to claim 1 which includes a fitting on the proximal end of said body adapted to receive a syringe tip.

3. A catheter according to claim 1 in which the catheter is of a woven plastic material having dimensional stability and being at least partially radiopaque.

4. A catheter according to claim 1, in which the sleeve is sealed to the body by a circumferential tie covered by adhesive.

5. In comBination, a catheter according to claim 1 and an outer cannula having at least one lumen open at both ends, the diameter of said lumen being substantially as great as the diameter of a circle passing through the outer ends of said protrusions, the length of said cannula being less than the length of the catheter, and said catheter being slidably received within in said cannula.

6. The combination of claim 5 in which the distal end of the cannula has a slanted opening, the area of which is larger than the cross-sectional area of the cannula lumen.

7. The combination of claim 5 in which the cannula is a radiopaque vinyl plastic and the catheter is at least partially radiopaque.