Method for placement of catheter in a blood vessel
First Claim
Patent Images
1. A method for blood vessel catheterization using a catheter with a guide wire slidably inserted through a lumen through the catheter, comprising the steps of:
- extending a J-shaped distal portion of the guide wire out of an open distal end of the catheter by sliding the guide wire within the catheter lumen to an extended position wherein the J-shaped distal portion of the guide wire is outside, and past the distal end of, the catheter and a comparably straight intermediate portion of the guide wire proximally adjoining the J-shaped distal portion is positioned within distal end portion of the catheter, andadvancing the catheter and guide wire, with the guide wire in the extended position, within and along a first blood vessel until the distal end of the catheter is opposite a juncture of the first blood vessel with a second blood vessel;
thenretracting substantially all of the J-shaped distal portion of the guide wire within the catheter by sliding the guide wire within the catheter lumen to a retracted position wherein the J-shaped distal portion of the guide wire is within the distal end portion of the catheter.rotating the guide wire, with the guide wire in the retracted position, until the distal end of the catheter is oriented toward the juncture of the second blood vessel, andadvancing the distal end of the catheter, with the guide wire in the retracted position, into the second blood vessel.
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Abstract
The present invention provides a catheter assembly for placement in a blood vessel which comprises a catheter body having an opening at the distal tip thereof and provided with a luer-connector at proximal portion and a flexible guide wire inserted into said catheter body and bendingly formed to be J-shaped at the distal tip thereof.
136 Citations
3 Claims
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1. A method for blood vessel catheterization using a catheter with a guide wire slidably inserted through a lumen through the catheter, comprising the steps of:
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extending a J-shaped distal portion of the guide wire out of an open distal end of the catheter by sliding the guide wire within the catheter lumen to an extended position wherein the J-shaped distal portion of the guide wire is outside, and past the distal end of, the catheter and a comparably straight intermediate portion of the guide wire proximally adjoining the J-shaped distal portion is positioned within distal end portion of the catheter, and advancing the catheter and guide wire, with the guide wire in the extended position, within and along a first blood vessel until the distal end of the catheter is opposite a juncture of the first blood vessel with a second blood vessel;
thenretracting substantially all of the J-shaped distal portion of the guide wire within the catheter by sliding the guide wire within the catheter lumen to a retracted position wherein the J-shaped distal portion of the guide wire is within the distal end portion of the catheter. rotating the guide wire, with the guide wire in the retracted position, until the distal end of the catheter is oriented toward the juncture of the second blood vessel, and advancing the distal end of the catheter, with the guide wire in the retracted position, into the second blood vessel. - View Dependent Claims (2, 3)
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Specification