Catheter systems, kits, and methods for gaining access to a vessel
Some of the present methods include, and some embodiments of the present systems are configured for gaining access to a patient's vessel by way of the vessel (i.e. from the inside out). Some embodiments facilitate gaining access to an occluded vessel, where part of the access path is through the occlusion.
1. A method for providing access to a central venous system of a patient comprising:
applying a radiopaque target having a radiopaque area and a radiolucent area to the skin of the patient so that the radiolucent area defines an exit area on the skin of the patient;
introducing a catheter and a projection angle catheter into the patient in an area remote from the exit point, wherein the projection angle catheter is configured to extend out a side aperture of a distal tip of the catheter at a projection angle, and a needle wire is configured to extend through the projection angle catheter, wherein the catheter has a aperture at a distal end of the distal tip configured such that the needle wire can extend through the aperture, and wherein the needle wire is configured such that it can penetrate a muscle tissue or thrombus without deflection;
advancing the needle wire through the distal end aperture of the catheter into a thrombus in the central venous system;
advancing the distal tip of the catheter over the needle wire into the thrombus in the central venous system, wherein the side aperture of the distal tip is disposed out of the thrombus;
viewing the catheter and said distal tip under fluoroscopy through the radiolucent area of the radiopaque target;
rotating the catheter so that the side aperture and therefore the projection angle plane is aligned with the radiolucent area of the radiopaque target;
adjusting the projection angle catheter so that the projection angle is aimed at the radiolucent area of the radiopaque target; and
advancing the needle wire through the projection angle catheter when the distal tip of the catheter is disposed in the thrombus and the side aperture of the distal tip is disposed out of the thrombus, such that the distal end of the needle wire advances at an angle relative to the catheter and penetrates the skin of the patient adjacent the radiolucent area of the radiopaque target thereby providing a distal end of the needle wire exterior to the skin.
2. The method of claim 1 , further comprising retracting the needle wire from the thrombus into the catheter.
3. The method of claim 1 , wherein the projection angle catheter comprises a preformed curved distal portion.
4. The method of claim 3 , further comprising retracting the needle wire from beyond the distal end aperture into the catheter and into the projection angle catheter, wherein the distal end of the needle wire is spaced apart from a distal end of the projection angle catheter at least a distance such that the needle wire is not impeding the curvature of the distal portion.
5. The method of claim 3 , further comprising retracting the needle wire from beyond the distal end aperture into the catheter and into the projection angle catheter, wherein the distal end of the needle wire is disposed in a non-curved portion of the projection angle catheter.
6. The method of claim 1 , further comprising retracting the needle wire from beyond the distal end aperture into the catheter and into the projection angle catheter, wherein the distal end of the needle wire is spaced apart from a distal end of the projection angle catheter at least a distance of 3 mm.
7. The method of claim 1 , further comprising:
attaching a dilation catheter to the exteriorized needle wire and drawing the dilation catheter into the exit point by pulling on a proximal end of the needle wire thereby forming a dilated tissue track.
8. The method of claim 7 , further comprising: advancing a guide wire into the dilation catheter and advancing a medical device over the guide wire along the dilated tissue track into the central venous system.
9. The method of claim 1 , wherein the introducing step occurs through a guide catheter.
10. The method of claim 1 , wherein the catheter is configured such that the distal tip can penetrate a thrombus without deflection.
11. A method for providing access to a central venous system of a patient comprising:
introducing a catheter into the patient, wherein the catheter has a projection angle catheter configured to extend out a side aperture of a distal tip of the catheter at a projection angle, and a needle wire configured to extend through the projection angle catheter, wherein the catheter has an aperture at a distal end of the distal tip configured such that the needle wire can extend through the aperture in a direction substantially parallel with a longitudinal axis of the catheter, wherein the projection angle is angled with respect to the longitudinal axis;
advancing the needle wire through the distal end aperture of the catheter and into a vessel occlusion, wherein the needle wire is configured such that it can penetrate a muscle tissue or vessel occlusion without deflection;
advancing the distal tip of the catheter over the needle wire into the vessel occlusion, wherein the aperture at the distal end of the distal tip is disposed out of the vessel occlusion;
retracting the needle wire into the catheter and the projection angle catheter;
advancing the projection angle catheter so that the catheter extends through the side aperture; and
advancing the needle wire through the projection angle catheter and through the skin of the patient when the distal tip of the catheter is disposed in the vessel occlusion and the side aperture of the distal tip is disposed out of the vessel occlusion, thereby providing a distal end of the needle wire exterior to the skin.
12. The method of claim 11 , wherein the vessel occlusion is located within the central venous system.
13. The method of claim 11 , wherein the needle wire follows a substantially straight path when advanced from the catheter to the surface of the skin.