Balloon inflation device

• US 5,152,776 A
• Filed: 11/15/1991
• Issued: 10/06/1992
• Est. Priority Date: 04/03/1990
• Status: Expired due to Term

• Current Assignee: Cordis Corporation (Cardinal Health, Inc.)
• Original Assignee: Cordis Corporation (Cardinal Health, Inc.)
• Inventors: Pinchuk, Leonard
• Primary Examiner(s): Thaler, Michael H.
• Application Number:
  US07/793,500
• Time in Patent Office: 326 Days
• Field of Search: 606/192, 606/194, 604/96, 604/97, 604/98, 604/99
• US Class Current: 606/192
• CPC Class Codes: A61M 25/10182 Injector syringes
• CPC Class Codes: A61M 25/10184 Means for controlling or monitoring inflation or deflation

Abstract

A balloon inflation device is provided by which fluid conditions, such as pressure, developed within a known angioplasy balloon may be controlled according to a predetermined pattern. Actual fluid conditions developed within the balloon are identified by a monitor included within the invention and are communicated to a microprocessor from which, when appropriate, corrective orders are sent to the drive mechanism.

Claims

1. A device for the controlled opening of partially or wholly intraluminally blocked biologic passageways, said device comprising:

balloon means for dilating blockage of vasculature and other biologic passageways, said balloon attached to a generally distal end of a catheter;

said device increasing and decreasing the radial size of the balloon according to a predetermined pattern which prevents prolonged cessation of blood flow to distal sites of the biologic passageway;

pump means for dispensing to and withdrawing fluid from said balloon through said catheter;

a drive mechanism for causing said pump means to dispense and withdraw fluid from said balloon for increasing and decreasing, respectively, the radial size of said balloon;

monitoring means for identifying actual pressure conditions developed within said balloon positioned in general alignment with the blockage, said monitoring means including a pressure monitor having a pressure feedback transducer interposed between said drive mechanism and said pump means;

microprocessor means;

interconnection means for transmitting orders from said microprocessor and transmitting information from said monitoring means; and

said microprocessor including means for controlling the drive mechanism according to said predetermined pattern, said controlling logic means including additional logic means for evaluating information transmitted from said monitoring means through said interconnection means as to the actual pressure conditions developed within the balloon, said controlling logic means further containing corrective logic means for comparing the actual pressure conditions with the predetermined pattern and generating appropriate corrective orders for actuating said drive mechanism when differences between the expected pressure conditions and the actual pressure conditions are identified, whereby said controlling logic means automatically assures that said predetermined pattern is adhered to.

2. The balloon inflation device according to claim 1, wherein said pump means includes a piston and cylinder syringe assembly connected to a generally proximal end of said catheter.

3. The balloon inflation device according to claim 1, wherein said drive mechanism includes a motor by which said pump means can be accurately actuated.

4. The balloon inflation device according to claim 3, wherein said motor is a stepper motor.

5. The balloon inflation device according to claim 1, wherein said microprocessor includes a personal computer.

6. The balloon inflation device according to claim 1 wherein said microprocessor includes ports, through one of said ports information from said monitoring means through said interconnection means can be transmitted to said microprocessor.

7. The balloon inflation device according to claim 1, wherein said interconnection means includes an interface card by which said microprocessor transmits orders through said interconnection means to said drive mechanism.

8. The balloon inflation device according to claim 1, wherein said microprocessor includes added logic for determining the actual radial change of the balloon.