Devices for transvascular retrograde access placement
The present invention relates to methods of transvascular retrograde access placement and to devices that facilitate these methods. For purposes of the present invention, transvascular retrograde access placement generally comprises the insertion of a vascular catheter into a central blood vessel through the puncturing of the central blood vessel from the inside of the central blood vessel with a needle or other similarly configured device, or a needle-tipped guidewire of the present invention, and exiting that needle from the patient through the skin rather than the traditional approach of inserting a needle from the outside of the skin surface to the inside of a blood vessel.
1 . A method of accessing a vessel of a patient from an outside of a patient by penetrating the vessel from inside the patient, the method comprising:
inserting a vascular catheter at a cannulation site into a peripheral vein of a patient over a guidewire, the vascular catheter comprising:
a catheter body comprising:
a first lumen for receiving the guidewire, the first lumen extending longitudinally through the catheter body from a proximal end of the catheter body to an opening at a distal portion of the vascular catheter, the distal portion extending at an angle from a longitudinal axis of the catheter body, the catheter body being configured to be inserted into a blood vessel over the guidewire within the first lumen; and
a second lumen for receiving a needle-tipped guidewire, the second lumen positioned exteriorly from the proximal end of the catheter body to the distal portion of the vascular catheter, a distal portion of the second lumen extending at an angle from the longitudinal axis of the catheter body to a distal opening, the distal opening of the second lumen facing a wall of the blood vessel when the catheter body has been inserted into the blood vessel;
advancing the vascular catheter from the peripheral vein of the patient to a central vein of the patient;
positioning the vascular catheter within the central vein such that a distal opening of the second lumen is directed to a desired exit site on the wall of the central vein;
advancing the needle-tipped guidewire through the second lumen; and
piercing the desired exit site on the wall of the central vein and skin of the patient at an exit site with the needle-tipped guidewire.
2 . The method of claim 1 , further comprising passing a secondary vascular catheter over the needle-tipped guidewire from the outside of the skin such that a first end of the secondary vascular catheter passes through the exit site into the second vessel and a second end of the secondary vascular catheter is exposed from the skin of the patient.
3 . The method of claim 2 , further comprising removing the needle-tipped guidewire from the patient while the secondary vascular catheter remains in place.
4 . The method of claim 3 , wherein the needle-tipped guidewire is removed at either the cannulation site or the exit site.
5 . The method of claim 2 , wherein the vascular catheter is removed from the patient.
6 . The method of claim 5 , wherein the vascular catheter is removed from the patient before the secondary vascular catheter is inserted into the central vein.
7 . The method of claim 1 , wherein the curve ranges between 45 to 90 degrees from an axis of a proximal portion of the vascular catheter.
8 . The method of claim 1 , wherein the peripheral vein is a femoral vein.
9 . The method of claim 8 , wherein the central vein is a jugular vein.
10 . The method of claim 8 , wherein the central vein is a subclavian vein.
11 . The method of claim 1 , wherein the peripheral vein is an antecubital vein.
12 . The method of claim 11 , wherein the central vein is a jugular vein.
13 . The method of claim 11 , wherein the central vein is a subclavian vein.
14 . The method of claim 1 , wherein the exit site is at a mid-neck area of the patient.
15 . The method of claim 1 , wherein positioning the vascular catheter within the second vessel includes rotating the vascular catheter such that the distal opening of the second lumen is directed to the desired exit site on the wall of the second vessel.
16 . The method of claim 1 , further comprising visualizing diagnostically-opaque markers the vascular catheter prior to passing the needle-tipped guidewire through the desired exit site.
17 . A method of accessing a vessel of a patient from an outside of a patient by penetrating the vessel from inside the patient, the method comprising:
inserting a vascular catheter at a cannulation site into a first vessel of a patient over a guidewire, the vascular catheter comprising:
a catheter body comprising:
a first lumen for receiving the guidewire, the first lumen extending longitudinally through the catheter body from a proximal end of the catheter body to an opening at a distal portion of the vascular catheter, the distal portion extending at an angle from a longitudinal axis of the catheter body, the catheter body being configured to be inserted into a blood vessel over the guidewire within the first lumen; and
a second lumen for receiving a needle-tipped guidewire, the second lumen positioned exteriorly from the proximal end of the catheter body to the distal portion of the vascular catheter, a distal portion of the second lumen extending at an angle from the longitudinal axis of the catheter body to a distal opening, the distal opening of the second lumen facing a wall of the blood vessel when the catheter body has been inserted into the blood vessel;
advancing the vascular catheter from the first vessel of the patient to a second vessel of the patient;
positioning the vascular catheter within the second vessel such that a distal opening of the second lumen is directed to a desired exit site on the wall of the second vessel;
advancing the needle-tipped guidewire through the second lumen;
piercing the desired exit site on the wall of the second vessel and skin of the patient at an exit site with the needle-tipped guidewire;
passing a secondary vascular catheter over the needle-tipped guidewire from the outside of the skin such that a first end of the secondary vascular catheter passes through the exit site into the central vein and a second end of the secondary vascular catheter is exposed from the skin of the patient; and
removing the vascular catheter and needle-tipped guidewire from the cannulation site while the secondary vascular catheter remains in place and utilizing the secondary vascular catheter as the sole access point to perform an interventional procedure.
18 . The method of claim 17 , wherein removing the vascular catheter and needle-tipped guidewire from the cannulation site while the secondary vascular catheter remains in place further comprising removing the vascular catheter and needle-tipped guidewire from the cannulation site such that the exit site becomes the sole access point to the central vein.