Subcutaneous vascular access ports and related systems and methods

摘要

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.

主权项

1. A method of creating a buttonhole in an anatomical vessel that carries a fluid flow, the method comprising:
determining a position of a subcutaneous vascular access port that comprises a guidance passageway and is attached to a wall of the anatomical vessel such that an opening of the guidance passageway faces a portion of the wall of the anatomical vessel,
wherein the guidance passageway is devoid of any closure apparatus;wherein the wall of the anatomical vessel to which the vascular access port is attached defines a lumen through which the anatomical vessel carries the fluid flow,wherein a longitudinal axis of the anatomical vessel extends through the lumen such that the longitudinal axis of the anatomical vessel does not pass through the portion of the wall of the anatomical vessel that the opening of the vascular access port faces, andwherein the guidance passageway extends through the vascular access port and defines a central axis that is oriented at an angle relative to the longitudinal axis of the anatomical vessel; advancing a first needle through the skin of the patient and then into the guidance passageway of the vascular access port; passing the first needle through the guidance passageway toward the opening along a path that is constrained by the guidance passageway; advancing the first needle through the opening of the guidance passageway; and passing the first needle through the wall of the anatomical vessel at an insertion site of the anatomical vessel.