Introducer assembly with selectable side holes

An introducer assembly comprising:

• an introducer sheath defining an introducer sheath lumen and a plurality of introducer sheath side holes distributed longitudinally along the introducer sheath and open to the introducer sheath lumen;
• and
• an inner member defining an inner member lumen and a plurality of inner member side holes distributed longitudinally along the inner member and open to the inner member lumen,
• wherein when the inner member is inserted in the introducer sheath lumen, different subsets of introducer sheath side holes are configured to align with one more of the inner member side holes depending on a rotational orientation of the introducer sheath and the inner member to enable selective fluid delivery through a subset of introducer sheath side holes from the inner member lumen, and
• wherein the inner member is a dilator.

A method comprising:

• introducing a medical assembly into vasculature of a patient, the medical assembly comprising:
• an outer elongated body defining an outer body lumen and a plurality of outer body side holes distributed longitudinally along the outer elongated body and open to the outer body lumen;
• and
• an inner elongated body defining an inner body lumen and a plurality of inner body side holes distributed longitudinally along the inner elongated body and open to the inner body lumen, the inner elongated body being configured to be inserted in the outer body lumen,
• wherein when the inner elongated body is positioned in the outer body lumen, the inner elongated body is configured to rotate relative to the outer elongated body between:
• a first rotational orientation in which a first subset of outer body side holes aligns with a first subset of inner side and in which the inner elongated body blocks a second subset of outer body side holes, and
• a second rotational orientation in which the second subset of outer body side holes aligns with a second subset of inner body side holes and in which the inner elongated body blocks the first subset of outer body side holes, and
• wherein the outer elongated body is an introducer sheath and the inner elongated body is a dilator;
• and
• rotating at least one of the inner elongated body or the outer elongated body to position the inner elongated body in the first rotational orientation.

A medical assembly comprising:

• an outer elongated body defining an outer body lumen and a plurality of outer body side holes distributed longitudinally along the outer elongated body and open to the outer body lumen;
• and
• an inner elongated body defining an inner body lumen and a plurality of inner body side holes distributed longitudinally along the inner elongated body and open to the inner body lumen, the inner elongated body being configured to be inserted in the outer body lumen,
• wherein when the inner elongated body is positioned in the outer body lumen, the inner elongated body is configured to rotate relative to the outer elongated body between:
• a first rotational orientation in which a first subset of outer body side holes aligns with a first subset of inner body side holes and in which the inner elongated body blocks a second subset of outer body side holes, and
• a second rotational orientation in which the second subset of outer body side holes aligns with a second subset of inner body side holes and in which the inner elongated body blocks the first subset of outer body side holes, and
• wherein the inner elongated body defines a closed distal end.