Methods and apparatus for aspiration and priming of inflatable structures in catheters
First Claim
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1. A method for priming an inflatable chamber on a catheter with liquid, said method comprising:
- drawing a vacuum in the chamber through the inflation lumen to remove gas, wherein a residual amount of gas is left; and
filling the chamber with liquid;
wherein an aspiration baffle is disposed in the catheter body said baffle defining a sealed interior volume open to an interior of the inflatable chamber through a plurality of microholes only;
wherein the interior volume of the aspiration baffle is evacuated through the microholes as the vacuum is drawn in the interior of the inflatable chamber through the inflation lumen so that the residual amount of gas may pass from the inflatable chamber into the interior volume of said aspiration tube.
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Abstract
An aspiration baffle comprises an outer tube and an inner core wire. Microholes are provided in the outer tubular member to permit passage of gas but inhibit the passage of liquids. The aspiration baffle is used in a catheter having a balloon or other inflatable structure to assist in priming of the structure. After evacuating the inflatable structure by applying a vacuum, the aspiration baffle can collect and trap residual gas which remains during the priming of the inflatable structure.
56 Citations
8 Claims
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1. A method for priming an inflatable chamber on a catheter with liquid, said method comprising:
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drawing a vacuum in the chamber through the inflation lumen to remove gas, wherein a residual amount of gas is left; and
filling the chamber with liquid;
wherein an aspiration baffle is disposed in the catheter body said baffle defining a sealed interior volume open to an interior of the inflatable chamber through a plurality of microholes only;
wherein the interior volume of the aspiration baffle is evacuated through the microholes as the vacuum is drawn in the interior of the inflatable chamber through the inflation lumen so that the residual amount of gas may pass from the inflatable chamber into the interior volume of said aspiration tube. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification