Subcutaneous vascular access port, needle and kit, and methods of using same
First Claim
1. An implantable vascular access port, comprising:
- a main port body having a hollow internal chamber formed therein with a curved floor at the base of the internal chamber, said main port body having an outlet formed in a side wall thereof in communication with the internal chamber, wherein the internal chamber has a proximal portion near the outlet and a distal portion opposite the outlet;
a septum covering a surface of the main port body and formed from a flexibly resilient material; and
a hollow outlet tube attached to the main port body and in fluid communication with the outlet thereof;
wherein the main port body is configured such that when viewed in a cross-section taken along a central vertical plane, the distal portion of the internal chamber has a concavely curved inner surface which slopes gradually downwardly below the septum and which merges smoothly and seamlessly with the curved floor, and the proximal portion has an inner surface which extends toward the outlet, such that the internal chamber of the access port is formed in an asymmetric curved conical shape directed substantially toward the outlet, such that during a medical procedure, when a tip portion of a hollow needle is inserted through the septum, and a guide wire is fed through the needle and into the internal chamber, the shape of the internal chamber passively guides the guide wire toward the outlet.
0 Assignments
0 Petitions
Accused Products
Abstract
A surgically implantable access port has a main port body with an internal chamber formed therein, and an outlet tube connected to the main port body. The internal chamber is configured to readily receive a guide wire therein, and to passively direct the tip of a guide wire to an outlet, which is in fluid communication with the outlet tube. The chamber in the main port body is formed in a directionally aimed conical shape. The outlet may be located at the lowest area of the chamber, to help direct a guide wire thereto. A specialized needle is also described, having a curved tip with an opening formed therein. The top inner surface and the bottom outer surface of the needle, adjacent the tip opening, are rounded and non-sharp to avoid damaging a guide wire or catheter when used therewith. Methods of using the port and needle are also disclosed.
116 Citations
18 Claims
-
1. An implantable vascular access port, comprising:
-
a main port body having a hollow internal chamber formed therein with a curved floor at the base of the internal chamber, said main port body having an outlet formed in a side wall thereof in communication with the internal chamber, wherein the internal chamber has a proximal portion near the outlet and a distal portion opposite the outlet; a septum covering a surface of the main port body and formed from a flexibly resilient material; and a hollow outlet tube attached to the main port body and in fluid communication with the outlet thereof; wherein the main port body is configured such that when viewed in a cross-section taken along a central vertical plane, the distal portion of the internal chamber has a concavely curved inner surface which slopes gradually downwardly below the septum and which merges smoothly and seamlessly with the curved floor, and the proximal portion has an inner surface which extends toward the outlet, such that the internal chamber of the access port is formed in an asymmetric curved conical shape directed substantially toward the outlet, such that during a medical procedure, when a tip portion of a hollow needle is inserted through the septum, and a guide wire is fed through the needle and into the internal chamber, the shape of the internal chamber passively guides the guide wire toward the outlet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 18)
-
-
9. An implantable vascular access port, comprising:
-
a main port body having a hollow internal chamber formed therein with a curved floor below the internal chamber, wherein the internal chamber has a proximal portion near the outlet and a distal portion opposite the outlet, said main port body having an outlet aperture formed in a side wall thereof in communication with the internal chamber; a septum covering a surface of the main port body and formed from a flexibly resilient material; and a hollow outlet tube attached to the main port body and in fluid communication with the internal chamber thereof via the outlet aperture; wherein the main port body is configured such that when viewed in a cross-section taken along a central vertical plane, the distal portion of the internal chamber has a concavely curved inner surface which slopes gradually downwardly below the septum and which merges smoothly with the curved floor, and the proximal portion has an inner surface which extends toward the outlet, such that the internal chamber tapers in an asymmetrical curved conical shape toward the outlet of the main port body, such that during a medical procedure, when a tip portion of a hollow needle is inserted through the septum, and a guide wire is fed through the needle and into the internal chamber, the shape of the internal chamber passively guides the guide wire toward the outlet. - View Dependent Claims (10, 11)
-
-
12. A guide needle for use in feeding a guide wire therethrough during a vascular access procedure, said guide needle comprising:
-
a hollow needle body having a first end and a second end opposite the first end, said first end having an access aperture formed therein configured to receive a guide wire; said second end comprising a curved tip having an opening formed therein, said needle body having a passage formed therethrough extending from the access aperture to the opening of the tip; wherein the opening of the needle tip has a rounded lower edge portion formed thereon at a lower, outwardly facing edge thereof, and also has a rounded upper edge portion formed thereon at an upper, inwardly facing edge of the opening, wherein the needle tip is configured such that when a wire guide is inserted through the passage of the needle body, extended outwardly from the opening of the needle tip during a medical procedure, and is subsequently retracted back through the needle body, the wire guide contacts the rounded upper edge portion of the needle tip at the upper, inwardly facing edge of the opening during such retraction, and passes over said rounded upper edge portion substantially without interference with, or resistance from said rounded upper edge portion. - View Dependent Claims (13, 14)
-
-
15. A guide needle for use in feeding a guide wire therethrough during a vascular access procedure, said guide needle comprising:
-
a hollow needle body having a first end and a second end opposite the first end, said first end having an access aperture formed therein configured to receive a guide wire; said second end comprising a curved tip having an opening formed therein, said needle body having a passage formed therethrough extending from the access aperture to the opening of the tip; and a hollow receptacle body having a space formed therein, the receptacle body attached to the needle body and in fluid communication with the passageway of the needle body; wherein the opening of the needle tip has a rounded lower edge portion formed thereon at a lower, outwardly facing edge thereof, and also has a rounded upper edge portion formed thereon at an upper, inwardly facing edge of the opening; wherein the needle tip is configured such that when a wire guide is inserted through the passage of the needle body, extended outwardly from the opening of the needle tip during a medical procedure, and is subsequently retracted back through the needle body, the wire guide contacts the rounded upper edge portion of the needle tip at the upper, inwardly facing edge of the opening during such retraction, and passes over said rounded upper edge portion substantially without interference with, or resistance from said rounded upper edge portion. - View Dependent Claims (16)
-
-
17. A method of removing an accumulated sheath from a distal end of a catheter attached to an implanted vascular access port in a patient, wherein the vascular access port comprises:
- a main port body having a hollow internal chamber formed therein with a curved floor below the internal chamber, said main port body having an outlet formed in a side wall thereof in communication with the internal chamber, wherein the internal chamber has a proximal portion near the outlet and a distal portion opposite the outlet, a septum covering a surface of the main port body and formed from a flexibly resilient material; and
a hollow outlet tube attached to the main port body and in fluid communication with the outlet thereof;said main port body configured such that when viewed in a cross-section taken along a central vertical plane, the distal portion of the internal chamber has a concavely curved inner surface which slopes gradually downwardly below the septum and which merges smoothly with the curved floor, and the proximal portion has an inner surface which extends toward the outlet, such that the internal chamber tapers in an asymmetrical curved conical shape toward the outlet of the main port body, said method comprising the steps of; inserting a tip of a guide needle through a septum of the vascular port; threading a guide wire through the guide needle, through the internal chamber of the access port, through the outlet, and out through the outlet tube, whereby the shape of the internal chamber passively guides the guide wire toward the outlet and thereby facilitates alignment of the guide wire with the outlet aperture of the access port; extending the guide wire through the catheter and outwardly beyond the distal end of the catheter; placing a loop of a loop snare over the sheath; and pulling the sheath off of the guide wire using the loop snare.
- a main port body having a hollow internal chamber formed therein with a curved floor below the internal chamber, said main port body having an outlet formed in a side wall thereof in communication with the internal chamber, wherein the internal chamber has a proximal portion near the outlet and a distal portion opposite the outlet, a septum covering a surface of the main port body and formed from a flexibly resilient material; and
Specification