Vascular access ports and related methods
Ports for accessing a vessels within a patient include passageways that can guide needles or other access devices directly into the vessels. The ports can be implanted subcutaneously within a patient. Some ports may be used in the creation and use of vascular access buttonholes.
1. A vascular access port configured to be implanted subcutaneously, the vascular access port comprising:
a base that extends in a longitudinal direction and in a transverse direction, wherein the base is configured to be bowed in the transverse direction when the vascular access port is attached to a vessel so as to conform to a contour of a wall of a vessel, and wherein the longitudinal direction of the base is configured to run substantially parallel to a lumen of the vessel when the vascular access port is attached to the vessel;
a guidance passageway that extends through the vascular access port and defines an opening in the base, wherein the guidance passageway comprises a funnel region that decreases in size toward a channel and is rearward of the channel, wherein a central axis that extends through the guidance passageway defines an acute angle relative to a longitudinal length of the base, and wherein the acute angle points in a forward direction toward a front end of the vascular access port; and
an ingrowth-inducing covering on the base, wherein at least a portion of the ingrowth-inducing covering is between the opening of the guidance passageway and the front end of the vascular access port, and wherein the ingrowth-inducing covering is configured to promote attachment of the vascular access port to a vessel so as to maintain the opening of the guidance passageway at a fixed position relative to a wall of the vessel.
2. The vascular access port of claim 1 , wherein the ingrowth-inducing covering encompasses the opening of the guidance passageway.
3. The vascular access port of claim 1 , further comprising a flange that at least partially encompasses the opening of the guidance passageway, wherein the flange comprises one or more attachment passages through which one or more attachment members can extend so as to attach the vascular access port to a vessel.
4. The vascular access port of claim 3 , wherein the flange comprises an attachment passage at the front end of the vascular access port.
5. The vascular access port of claim 3 , wherein the flange comprises a plurality of attachment passages that extend through the base, and wherein the attachment passages define a perimeter of an attachment area that is covered by the ingrowth-inducing covering.
6. The vascular access port of claim 5 , wherein the guidance passageway opening is within the attachment area.
7. The vascular access port of claim 1 , wherein the ingrowth-inducing covering is constrained to a bottom surface of the base of the vascular access port and an upper portion of the vascular access port is smooth so as to discourage ingrowth of fascia at the upper portion of the vascular access port.
8. The vascular access port of claim 1 , wherein the ingrowth-inducing covering comprises a plurality of titanium beads that have an average diameter of no greater than about 5 thousandths of an inch.
9. The vascular access port of claim 1 , wherein a height of the vascular access port is no less than about 0.5 times a width of the base.
10. The vascular access port of claim 1 , wherein the vascular access port further comprises a body that extends upwardly from the base, wherein the guidance passageway extends through at least a portion of the body.
11. The vascular access port of claim 1 , wherein the acute angle between the central axis of the guidance passageway and the longitudinal length of the base is no greater than about 60 degrees.
12. The vascular access port of claim 1 , further comprising a graft extension, a housing, or a patch configured to encompass at least a portion of a vessel in order to secure the vascular access port to the vessel.
13. The vascular access port of claim 1 , wherein a portion of the vascular access port that is configured to be attached to the vessel comprises a first resorbable material.
14. The vascular access port of claim 13 , wherein the guidance passageway comprises a non-resorbable material or a second resorbable material that has a slower resorption rate than the first resorbable material.
15. A vascular access port comprising:
a base that extends in a longitudinal direction and in a transverse direction, wherein the base is configured to be bowed in the transverse direction when the vascular access port is attached to a vessel so as to conform to a contour of a wall of a vessel, and wherein the longitudinal direction of the base is configured to run substantially parallel to a lumen of the vessel when the vascular access port is attached to the vessel;
a guidance passageway that extends through the vascular access port, wherein the guidance passageway comprises a funnel region that decreases in size toward a channel and is rearward of the channel, wherein a central axis defined by the guidance passageway defines an acute angle relative to a longitudinal length of the base, and wherein the acute angle points in a forward direction toward a front end of the vascular access port; and
an attachment passage forward of the guidance passageway through which an attachment device can extend to connect the vascular access port to a vessel so as to resist forward movement of the vascular access port relative the vessel as an access device is advanced toward or through the guidance passageway.
16. The vascular access port of claim 14 , wherein the attachment device comprises one of a suture, a pinch ring, a hook, and a wire.
17. The vascular access port of claim 14 , wherein the vascular access port further comprises a body that extends upwardly from the base, wherein the guidance passageway extends through at least a portion of the body.
18. The vascular access port of claim 14 , further comprising an additional attachment passage at a rearward end of the vascular access port.
19. A kit comprising:
the vascular access port of claim 14 ; and
one or more of a suture, a synthetic graft, and one or more additional vascular access ports.
20. The vascular access port of claim 1 , wherein the base is rigid and is permanently bowed in the transverse direction.
21. The vascular access port of claim 15 , wherein the base is rigid and is permanently bowed in the transverse direction.