Balloon catheter and method of use of the same

• US 4,983,166 A
• Filed: 04/16/1990
• Issued: 01/08/1991
• Est. Priority Date: 12/28/1987
• Status: Expired due to Fees

• Current Assignee: Yoshiharu Yamawaki
• Original Assignee: Yoshiharu Yamawaki
• Inventors: Yamawaki, Yoshiharu
• Primary Examiner(s): Rosenbaum, C. Fred
• Assistant Examiner(s): NOT, DEFINED
• Application Number:
  US07/511,917
• Time in Patent Office: 267 Days
• Field of Search: 604/93, 604/96, 604/97, 604/98, 604/101-102, 604/280, 604/281, 600/18, 600/31, 606/191-197
• US Class Current: 604/99.04
• CPC Class Codes: A61M 25/10 Balloon catheters A61M25/0125 takes precedence; embolectomy A61B17/22032; retractors A61B17/02; inflatable balloons for placing stents or stent-grafts A61F2/958 ; stomach balloons for treatment of obesity A61F5/0003; oesophagal tubes A61J15/00

Abstract

A balloon catheter comprised a balloon catheter body, a balloon, a main passage and an auxiliary passage. The balloon is provided on the periphery of the tip portion of the catheter body to inflate for blocking a bloodstream at a desired site inside blood vessels. The auxiliary passage is provided for inflating the balloon. The main passage is provided behind the balloon, having an opening to eject a drug. The tip portion of the balloon catheter is inserted into one of branches of the blood vessel near targeted affected part. A fluid is injected into the balloon so that the balloon blocks a bloodstream in the branches. Therefore, a drug is ejected through the main passage of the balloon catheter into other branches.

Claims

1. A balloon catheter for injecting a drug to an affected part through an artery, comprising:

a catheter body having a circulatory curved tip end portion, whereby said tip end portion can be inserted from a thicker artery into a thinner artery diverging from said thicker artery at an acute angle;

a main passage provided in said catheter body for transporting and ejecting said drug, said main passage having an opening formed on a peripheral surface of said curved tip end portion and a curved portion smoothly curved toward said opening whereby a drug ejecting member and a thinner catheter are allowed to go through said main passage;

a balloon provided around the periphery in said curved tip end portion between said tip end and said main passage, for inflating to block a bloodstream at a desired site inside said thinner artery; and

an auxiliary passage provided in said catheter body for injecting fluid into said balloon for inflating said balloon.

2. A balloon catheter according to claim 1 wherein said opening is provided about 1 to 2 cm behind said balloon.

3. A balloon catheter according to claim 2, wherein the tip end of said catheter body is formed into a hemisphere shape.

4. A balloon catheter according to claim 1, further comprising a pair of tubes each having valves and are connected to said catheter body and lead to said main passage and said auxiliary passage, respectively.