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 catheter system comprising:
a first catheter comprising:
a shaft comprising a proximal end and a distal end extending along a longitudinal axis and defining a shaft lumen extending therebetween;
a distal tip disposed at the distal end of the shaft and defining a lumen extending along a longitudinal axis and in fluid communication with the shaft lumen and comprising a proximal end and a distal end, wherein the distal tip comprises a first side aperture in fluid communication with the shaft lumen and an exit aperture at the distal end of the distal tip in fluid communication with the shaft lumen, the exit aperture defining an opening which is substantially parallel with the longitudinal axis of the shaft;
wherein the first catheter is configured such that the distal tip can penetrate a vessel occlusion without deflection;
a second catheter having a portion configured to extend through the shaft lumen and the first side aperture, the second catheter comprising a proximal end and a distal end and defining a lumen along a longitudinal axis between the proximal end and the distal end, wherein the portion of the second catheter is curved along the longitudinal axis of the lumen and the curved portion is closer to the distal end of the second catheter than the proximal end of the second catheter, wherein the first catheter and the second catheter are configured such that the distal end of the second catheter passes through the first side aperture of the first catheter when advanced through the first catheter; and
a needle wire configured to extend through the second catheter lumen and to extend through the distal end exit aperture of the first catheter in a direction substantially parallel with the longitudinal axis of the shaft, the needle wire having a sharp dissection tip, wherein the needle wire has a bending stiffness sufficient to penetrate a muscle tissue without deflection from a location within a vessel to a location exterior the body.
2. The catheter system of claim 1 , wherein the distal tip further comprises a second side aperture and a radiopaque material defining at least a portion of the second side aperture.
3. The catheter system of claim 2 , wherein the distal tip further comprises a third side aperture located on the opposite side of the distal tip from the second side aperture, wherein the radiopaque material defines the third side aperture disposed opposite of the second side aperture.
4. The catheter system of claim 1 , for use in creating an access path from a location within a vessel to a location on the skin of a patient.
5. The catheter system of claim 4 , wherein the vessel is the right internal jugular or the superior vena cava.
6. The catheter system of claim 1 , wherein a distal portion of the first side aperture is defined by a surface that is a ramp configured to guide the second catheter through the first side aperture.
7. The catheter system of claim 1 , wherein a distal portion of the first side aperture is defined by a curved surface.
8. The catheter system of claim 7 , wherein the curved surface is a concave surface.
9. The catheter system of claim 7 , wherein the curved surface is an inclined surface, wherein an incline angle of the inclined surface is at an angle relative to the longitudinal axis of the first catheter and sloped inward toward the distal end of the shaft.
10. The catheter system of claim 9 , wherein the distal tip comprises a sidewall body having an inner luminal surface, wherein a portion of the inner luminal surface that is proximal and opposite to the first side aperture is a sloped surface.
11. The catheter system of claim 1 , wherein the distal tip further comprises a second side aperture opposite the first side aperture such that a line transverse to the longitudinal axis of the first catheter passes through the first and second side apertures.
12. A catheter system comprising:
a first catheter comprising:
a shaft comprising a proximal end and a distal end extending along a longitudinal axis and defining a shaft lumen extending therebetween;
a distal tip disposed at the distal end of the shaft and defining a lumen extending along a longitudinal axis and in fluid communication with the shaft lumen and comprising a distal end, wherein the distal tip comprises a first, second, and third side aperture in fluid communication with the shaft lumen and an exit aperture at the distal end of the distal tip in fluid communication with the shaft lumen;
wherein the second and/or third side aperture is configured to facilitate circumferential alignment of the first catheter;
wherein the first catheter is configured such that the distal tip can penetrate a vessel occlusion without deflection;
a second catheter having a portion configured to extend through the shaft lumen and the first side aperture, the second catheter comprising a proximal end and a distal end and defining a lumen along a longitudinal axis between the proximal end and the distal end, wherein the portion of the second catheter is curved along the longitudinal axis of the lumen and the curved portion is closer to the distal end of the second catheter than the proximal end of the second catheter, wherein the first catheter and the second catheter are configured such that the distal end of the second catheter passes through the first side aperture of the first catheter when advanced through the first catheter; and
a needle wire configured to extend through the second catheter lumen and to extend through the distal end exit aperture of the first catheter in a direction substantially parallel with the longitudinal axis of the shaft, the needle wire having a sharp dissection tip, wherein the needle wire has a bending stiffness sufficient to penetrate a muscle tissue without deflection from a location within a vessel to a location exterior the body.
13. The catheter system of claim 12 , wherein the distal tip further comprises a second side aperture and a radiopaque material defining at least a portion of the second side aperture.
14. The catheter system of claim 13 , wherein the distal tip further comprises the radiopaque material defining a third side aperture disposed opposite of the second side aperture.
15. The catheter system of claim 12 , wherein a distal portion of the first side aperture is defined by a surface that is a ramp configured to guide the second catheter through the first side aperture.
16. The catheter system of claim 12 , wherein a distal portion of the first side aperture is defined by a curved surface.
17. The catheter system of claim 16 , wherein the curved surface is a concave surface.
18. The catheter system of claim 16 , wherein the curved surface is an inclined surface, wherein an incline angle of the inclined surface is at an angle relative to the longitudinal axis of the first catheter and sloped inward toward the distal end of the shaft.
19. The catheter system of claim 18 , wherein the distal tip comprises a sidewall body having an inner luminal surface, wherein a portion of the inner luminal surface that is proximal and opposite to the first side aperture is a sloped surface.
20. The catheter system of claim 12 , wherein the distal tip further comprises a second side aperture opposite the first side aperture such that a line transverse to the longitudinal axis of the first catheter passes through the first and second side apertures.