Method of percutaneously removing a thrombus from a blood vessel by using catheters and system for removing a thrombus from a blood vessel by using catheters

• US 5,059,178 A
• Filed: 01/18/1991
• Issued: 10/22/1991
• Est. Priority Date: 08/03/1988
• Status: Expired due to Fees

• Current Assignee: Koshin International Corporation
• Original Assignee: Wang D. Ya
• Inventors: Ya, Wang D.
• Primary Examiner(s): Pellegrino, Stephen C.
• Assistant Examiner(s): Lewis, Ralph A.
• Application Number:
  US07/298,547
• Time in Patent Office: 277 Days
• Field of Search: 604/53, 604/96, 604/101, 604/102, 604/103, 604/104, 606/159, 606/191, 606/192, 606/194
• US Class Current: 604/101.03
• 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 2017/22051 with an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation A61B2017/22048, A61B2017/3486 take precedence
• CPC Class Codes: A61B 2017/22084 stone- or thrombus-dissolving
• CPC Class Codes: A61M 2025/109 having balloons for removing solid matters, e.g. by grasping or scraping plaque, thrombus or other matters that obstruct the flow
• 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 25/1011 Multiple balloon catheters

Abstract

A method of percutaneously removing a thrombus from a blood vessel by using catheters and thrombus removing system for executing the method. A guide wire catheter includes a first balloon inflatable for blocking the blood vessel at a position downstream of the thrombus. A suction catheter includes a second balloon inflatable for substantially blocking the blood vessel at a position upstream of the thrombus. A thrombus dissolving agent is supplied to a position between the first and second balloons, and dissolved thrombus is drawn through the suction catheter out of the body. An expansion catheter having a third balloon is used to expand, while allowing blood flows, a location of stricture remaining after removal of the dissolved thrombus.

Claims

1. A thrombus removing system using catheters, comprising:

a guide wire catheter, said guide wire catheter including a hollow main body including a rear end and a forward end, a guide wire extending from the forward end of the hollow main body, and a first balloon disposed adjacent the forward end of said hollow main body for blocking blood flow in a blood vessel, the first balloon being inflatable under a predetermined internal pressure and deflatable under a pressure less than the predetermined internal pressure, the hollow main body defining a supply opening for supplying a first fluid to inflate the first balloon, and outflow bores in said hollow main body located at a position rearward of said first balloon for supplying a thrombus dissolving agent to a rear area of said first balloon,

a thrombus suction catheter having a hollow construction for receiving the guide wire catheter, and including a suction passage for collecting the thrombus as dissolved and the thrombus dissolving agent, and a second balloon disposed adjacent a forward end of said thrombus suction catheter toward the rear of said hollow main body from said outflow bores with said forward end of said guide wire catheter extending beyond the forward end of said thrombus suction catheter, the second balloon being formed against inward and outward overexpansion under a predetermined pressure, the second balloon including an inside wall comprised of elastic webs and relatively rigid wall parts alternately arranged and interconnected in the peripheral direction, said inside wall being surrounded by an inelastic film extending so as to interconnect the rigid wall parts to define a substantially bag-like construction together, and further including an outermost wall disposed outwardly of the inelastic film so as to define an expansion space therebetween, the thrombus suction catheter defining a second fluid supply passage for supplying a second fluid to inflate the second balloon, said second fluid supply passage being further defined by an outer tube of the thrombus suction catheter having a double tube construction, and the suction passage comprising a space in the thrombus suction catheter between the guide wire catheter and the thrombus suction catheter remaining after the guide wire catheter is inserted thereinto,

means for supplying the first fluid under pressure to inflate the first balloon,

means for supplying the thrombus dissolving agent under pressure,

means for supplying the second fluid under pressure to inflate the second balloon, and

suction means for collecting the thrombus as dissolved and the thrombus dissolving agent.